JP2003069551A - Encrypting device and method, decrypting device and method, storage medium, as well as program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent unauthorized usage or alteration of content data. SOLUTION: A content data Dc is encrypted by an encryption key Kc and recorded in HDD 58 as encryption data E (Kc, Dc). An object data Do is encrypted by the encryption key Kc and recorded in HDD 58 as encryption data E (Kc, Do). The encryption key Kc is encrypted by a specific key Kstg included in an encryption program and recorded in HDD 58 as encryption data E (Kstg, Kc). The specific key Kstg used in encryption of the encryption key Kc is encrypted by a device key Kdev and recorded in sub CPU 64 as encryption data E (Kdev, Kstg). The device key Kdev used in encryption of the specific key Kstg is recorded in a flush ROM 52.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an encryption device and method, a decryption device and method, a recording medium, and a program, and in particular, by disposing encrypted data and a plurality of encryption keys in a distributed manner, The present invention relates to an encryption device and method, a decryption device and method, a recording medium, and a program that prevent unauthorized use and falsification.

[0002]

2. Description of the Related Art For example, when recording content data such as music on an information recording medium, the content data is encrypted by an encryption program in order to prevent unauthorized use or falsification of the content data.
The encrypted content data is decrypted by a key for deciphering (hereinafter, referred to as an encryption key) to be in a usable state.

[0003]

Therefore, a person who intends to illegally use or falsify the content data (hereinafter,
If an encryption key is obtained by an unauthorized user), the encrypted content data may be decrypted and used illegally or tampered with.

Further, when an encrypted program is acquired by an unauthorized user, it is analyzed to
There is a problem that the encrypted content data may be decrypted.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent an encryption key for decrypting encrypted content data from being easily obtained by an unauthorized user.

[0006]

A first encryption device of the present invention is an encryption means for encrypting content data using a first encryption key to generate first encrypted data, and an encryption means. First recording means for recording the first encrypted data generated by the information recording medium, and second recording means for recording the first encryption key encrypted by the second encryption key on the information recording medium And a first holding means for holding the second encryption key encrypted by the third encryption key, and a second holding means for holding the third encryption key.

The information recording medium may be a hard disk drive.

The first holding means may be a dedicated IC which outputs the first encryption key encrypted by the second encryption key only through a predetermined interface.

The second holding means may be a flash memory.

The encryption means can also encrypt the object data relating to the right information of the content data to generate the second encrypted data.
The recording means can record the second encrypted data generated by the encryption means on the information recording medium.

According to the first encryption method of the present invention, the first encryption key is used to encrypt the content data to generate the first encrypted data, and the encryption step is performed. A first recording step of recording the first encrypted data on the information recording medium, a second recording step of recording the first encryption key encrypted by the second encryption key on the information recording medium, and a third recording step It is characterized by including a first holding step of holding a second encryption key encrypted by the above encryption key and a second holding step of holding a third encryption key.

The program of the first recording medium of the present invention is
An encryption step of encrypting content data by using a first encryption key to generate first encrypted data, and a first encryption data recorded by the processing of the encryption step in an information recording medium. And a second recording step of recording the first encryption key encrypted by the second encryption key on the information recording medium, and a second encryption key encrypted by the third encryption key. It is characterized by including a first holding step of holding and a second holding step of holding a third encryption key.

The first program of the present invention uses the first encryption key to encrypt the content data to generate the first encrypted data, and the first step generated by the processing of the encryption step. First recording step of recording the encrypted data of No. 2 on the information recording medium, a second recording step of recording the first encryption key encrypted by the second encryption key on the information recording medium, and a third encryption It is characterized in that the computer is caused to execute a first holding step of holding a second encryption key encrypted by the key and a second holding step of holding a third encryption key.

The second encryption device of the present invention uses the first encryption key to encrypt the content data to generate the first encrypted data, and the first encryption device to generate the first encrypted data. Recording means for recording the encrypted data of No. 1 in the hard disk drive, second recording means for recording the first encryption key encrypted by the second encryption key in the hard disk drive, and by the third encryption key It is characterized by including a dedicated IC for holding the encrypted second encryption key and a flash memory for holding the third encryption key.

The encryption means can also encrypt the object data relating to the rights information of the content data, and the first recording means also stores the rights information encrypted by the encryption means in the hard disk drive. It can be recorded.

The second encryption method of the present invention is generated by the encryption step of encrypting the content data using the first encryption key to generate the first encrypted data, and the processing of the encryption step. A first recording step of recording the first encrypted data in the hard disk drive, a second recording step of recording the first encryption key encrypted by the second encryption key in the hard disk drive, and a third encryption It is characterized by including a first holding step of holding the second encryption key encrypted by the key in the dedicated IC, and a second holding step of holding the third encryption key in the flash memory.

The program of the second recording medium of the present invention is
An encryption step of encrypting the content data using the first encryption key to generate the first encrypted data, and a first encryption data recorded by the processing of the encryption step in the hard disk drive. Recording step and second
A second recording step of recording the first encryption key encrypted with the encryption key of
The second encryption key encrypted with the encryption key of
And a second holding step of holding the third encryption key in the flash memory.

The second program of the present invention uses the first encryption key to encrypt the content data to generate the first encrypted data, and the first step generated by the processing of the encryption step. The first recording step of recording the encrypted data of No. 1 in the hard disk drive, the second recording step of recording the first encryption key encrypted by the second encryption key in the hard disk drive, and the third encryption key The computer is made to execute a first holding step of holding the encrypted second encryption key in the dedicated IC and a second holding step of holding the third encryption key in the flash memory.

The third encryption device of the present invention uses the first encryption key to encrypt the content data to generate the first encrypted data, and the first encryption device to generate the first encrypted data. First to record the encrypted data of the data on the information recording medium
Recording means and the first encrypted by the second encryption key
Second recording means for recording the encryption key of the above into an information recording medium,
It is characterized by including a first holding means for holding the second encryption key encrypted by the third encryption key and a second holding means for holding the third encryption key.

The information recording medium may be a hard disk drive.

The first holding means may be a dedicated IC for outputting the first encryption key encrypted by the second encryption key only through a predetermined interface.

The second holding means may be a flash memory.

The encryption means may also encrypt object data relating to right information of content data to generate second encrypted data.
The recording means can record the second encrypted data generated by the encryption means on the information recording medium.

The first decryption device of the present invention comprises an obtaining means for obtaining the encrypted second encryption key held by the first holding means and a third holding means held by the second holding means. Using the first encryption means for decrypting the encrypted second encryption key obtained by the obtaining means and the second encryption key decrypted by the first decryption means, and storing Encrypted data stored by the storage means using the second decryption means for decrypting the encrypted first encryption key stored by the means and the first encryption key decrypted by the second decryption means And a restoring means for decoding the content data and restoring the content data.

The storage means may be a hard disk drive.

The first holding means may be a dedicated IC which outputs the first encryption key encrypted by the second encryption key only through a predetermined interface.

The second holding means may be a flash memory.

The restoration means can decrypt the encrypted data and restore the object data relating to the right information of the content data.

The first decryption method of the present invention comprises an obtaining step of obtaining the encrypted second encryption key held by the first holding means, and a third holding step by the second holding means. A second decryption key for decrypting the encrypted second encryption key obtained in the process of the obtaining step using the encryption key of No. 2, and the second encryption key decrypted in the process of the first decryption step Using the second decryption step of decrypting the encrypted first encryption key stored by the storage means, and the first encryption key decrypted by the processing of the second decryption step. Decrypting the encrypted data stored by and restoring the content data.

The program of the third recording medium of the present invention is
Using the acquisition step of acquiring the encrypted second encryption key held by the first holding means and the third encryption key held by the second holding means, the acquisition step acquires the encrypted second encryption key. The first decryption step for decrypting the encrypted second encryption key and the second encryption key decrypted in the processing of the first decryption step are used to store the encrypted second encryption key stored in the storage means. The second decryption step of decrypting the first encryption key that is present and the first encryption key decrypted in the processing of the second decryption step are used to decrypt the encrypted data stored by the storage means to obtain the content data. And a restoring step of restoring.

A third program of the present invention comprises an acquisition step of acquiring the encrypted second encryption key held by the first holding means, and a third holding step held by the second holding means. First decryption of the encrypted second encryption key acquired in the process of the acquisition step using the encryption key
And a second decryption step of decrypting the encrypted first encryption key stored by the storage means using the second encryption key decrypted in the processing of the first decryption step, The first decoded in the processing of the second decoding step
The decryption step of decrypting the encrypted data stored by the storage means using the encryption key and restoring the content data is executed by the computer.

The second decryption device of the present invention uses the obtaining means for obtaining the encrypted second encryption key held by the dedicated IC and the third encryption key held by the flash memory, First decryption means for decrypting the encrypted second encryption key acquired by the acquisition means,
Second decryption means for decrypting the encrypted first encryption key stored by the hard disk drive using the second encryption key decrypted by the first decryption means;
The first decryption means is used to decrypt the encrypted data stored in the hard disk drive using the first encryption key to restore the content data.

The restoring means can decrypt the encrypted data and also restore the object data relating to the right information of the content data.

A second decryption method of the present invention uses an obtaining step of obtaining an encrypted second encryption key held by a dedicated IC and a third encryption key held by a flash memory, By the first decryption step of decrypting the encrypted second encryption key obtained in the processing of the obtaining step and the second encryption key decrypted in the processing of the first decryption step, the hard disk drive is used. A second decryption of the stored encrypted first encryption key
And a restoration step of decrypting the encrypted data stored by the hard disk drive using the first encryption key decrypted in the processing of the second decryption step and restoring the content data. To do.

The program of the fourth recording medium of the present invention is
Using the acquisition step of acquiring the encrypted second encryption key held by the dedicated IC and the third encryption key held by the flash memory, the encryption is acquired by the processing of the acquisition step. A first decryption step of decrypting the second encryption key and an encrypted first encryption key stored by the hard disk drive using the second encryption key decrypted in the processing of the first decryption step And a restoration step of decrypting the encrypted data stored by the hard disk drive using the first encryption key decrypted in the processing of the second decryption step to restore the content data. It is characterized by including.

The fourth program of the present invention uses the acquisition step of acquiring the encrypted second encryption key held by the dedicated IC and the acquisition step using the third encryption key held by the flash memory. Stored by a hard disk drive using a first decryption step of decrypting the encrypted second encryption key obtained in the processing of step and the second encryption key decrypted in the processing of the first decryption step. The second decryption step for decrypting the encrypted first encryption key and the first encryption key decrypted in the processing of the second decryption step are used to transfer the encrypted data stored by the hard disk drive. And a restoring step of decoding and restoring the content data.

The third decryption apparatus of the present invention comprises an obtaining means for obtaining the encrypted second encryption key held by the first holding means, and a third holding means held by the second holding means. Using the first encryption means for decrypting the encrypted second encryption key obtained by the obtaining means and the second encryption key decrypted by the first decryption means, and storing Encrypted data stored by the storage means using the second decryption means for decrypting the encrypted first encryption key stored by the means and the first encryption key decrypted by the second decryption means And a restoring means for decoding the content data and restoring the content data.

The storage means may be a hard disk drive.

The first holding means may be a dedicated IC which outputs the first encryption key encrypted by the second encryption key only through a predetermined interface.

The second holding means may be a flash memory.

The restoring means can decrypt the encrypted data and also restore the object data relating to the right information of the content data.

In the first encryption device and method, the third encryption device, and the first program of the present invention,
The content data is encrypted using the first encryption key to generate the first encrypted data, and the generated first encrypted data is recorded on the information recording medium. Further, the first encryption key encrypted by the second encryption key is recorded on the information recording medium. Further, the second encryption key encrypted by the third encryption key is held, and the third encryption key is held.

In the second encryption device and method and the program of the present invention, the first encryption key is used to encrypt the content data to generate the first encrypted data, and the first encrypted data is generated. The encrypted data is recorded on the hard disk drive. Further, the first encryption key encrypted with the second encryption key is recorded in the hard disk drive. Furthermore, the second encrypted by the third encryption key
Is stored in the dedicated IC, and the third encryption key is stored in the flash memory.

First Decoding Device and Method of the Present Invention, Third
In the decrypting device and the third program, the encrypted second encryption key is acquired, and the retained third encryption key is used, and the acquired encrypted second encryption key is Decrypted, the decrypted second encryption key is used to decrypt the encrypted first encryption key, and the decrypted first encryption key is used to decrypt the encrypted data to restore the content data. .

In the second decryption apparatus and method and the fourth program of the present invention, the encrypted second encryption key held by the dedicated IC is acquired, and the third decryption key held by the flash memory. The obtained encrypted second encryption key is decrypted by using the encrypted encryption key of No. 1, and the encrypted first encryption stored by the hard disk drive is decrypted by using the decrypted second encryption key. The key is decrypted, and the encrypted data stored by the hard disk drive is decrypted using the decrypted first encryption key to restore the content data.

[0046]

BEST MODE FOR CARRYING OUT THE INVENTION An outline of an audio server according to an embodiment of the present invention will be described with reference to FIG. The audio server 1 reads out PCM (Pulse Code Modulation) data recorded on the music CD 3,
The encoded data obtained by encoding by ATRAC (Adaptive Transform Acoustic Coding) 3 system is recorded in the hard disk drive 58 (FIG. 6), and the recorded encoded data is recorded from the upper layer side into a folder list, a folder, an album, a track, etc. The object is managed in association with the object having the hierarchical structure of.

The folder list can include a plurality of folders located one level below. A folder can include a plurality of albums located in a layer one level below. The album can include a plurality of tracks located one level below. The track located at the bottom of the hierarchical structure has one-to-one correspondence with encoded data for one song.
Corresponding to.

Hereinafter, the encoded data will also be described as content data. Folder lists, folders, albums, and tracks are also described as objects. The user
Specify various objects and issue various commands. Note that FIG. 38 shows details of the hierarchical structure of objects.
Will be described later with reference to.

The audio server 1 is a music CD 3
Is reproduced or the encoded data recorded in the hard disk drive (hereinafter, referred to as HDD) 58 is decoded, and the obtained audio signal is output from the speaker 2.

Further, the audio server 1 has a MagicGate (trademark) inserted in the MS slot 45 (FIG. 5).
For a Memory Stick (trademark) (hereinafter, referred to as MS) 4 corresponding to, and a portable device (hereinafter, referred to as PD) 5 such as a Network Walkman (trademark) connected to a connector 43 (FIG. 5), The encoded data recorded in the HDD 58 is recorded by the checkout process or the moveout process, and
The encoded data recorded on the HDD 4 or the PD 5 is recorded on the HDD 58 by the check-in process, the move-in process, or the import process.

Here, "MagicGate" means encryption of data recorded in MS4 corresponding to MagicGate, and M
It is a technology for protecting the copyright of data by two technologies including mutual authentication of the audio server 1 with S4 inserted and used, and it is possible to prevent unauthorized copying, reproduction and alteration of digital audio data. is there. MagicGate is SDMI (Secure Digital Music Initiative)
It complies with the standard.

The check-out processing, check-in processing, move-out processing, move-in processing, and import processing between the audio server 1 and the MS 4 or PD 5 will be described later.

The MS 4 on which the encoded data is recorded is taken out from the audio server 1 and mounted on, for example, the personal computer 6 so that the recorded encoded data is read and decoded.

The PD 5 on which the encoded data is recorded decodes the encoded data and outputs the obtained audio signal from the headphones.

The remote controller 7 receives an operation from the user and sends a corresponding control signal to the audio server 1.

Next, the external appearance of the audio server 1 will be described with reference to FIGS. FIG. 2 is an external view of the audio server 1 from the front upper side. Figure 3
3 is a top view of the audio server 1. FIG. FIG. 4 is a rear view of the audio server 1. FIG. 5 is a front view.

On the upper surface of the audio server 1, there is provided a lid 40 of a CD tray (not shown) on which a CD is mounted. The lid 40 has a power button 11 as shown in FIG.
In addition to buttons such as the above, a display 15 for displaying various kinds of information is arranged. POWER button 11
Is operated when the power of the audio server 1 is turned on / off. FUNCTION button 12
Is a music CD3, HDD58, AUX in terminal 3 as a sound source
Operated when selecting one of 1, MS4 and PD5.

The play mode (PLAY MODE) button 13 is
In the play mode, all tracks included in the play area are sequentially played once, normal playback, all tracks included in the play area are sequentially played, all-track repeat is repeated, and one track is repeatedly played. , Random repeat that repeats randomly selecting and playing from all the tracks included in the playback area, or displaying and selecting an animation that randomly selects from all the tracks included in the entire HDD. It is operated when switching to slot machine playback that repeats playing the track that was played. The reproduction area will be described later with reference to FIG. 71.

The display (DISPLAY) button 14 is operated when switching the display contents of the display 15. A display 15 formed of an LCD (Liquid Crystal Display) or the like displays information relating to the operating status and audio data.

The volume button 16 is operated to increase or decrease the output volume. Cursor button 17
Is operated when moving the cursor displayed on the display 15. The select button 18
It is operated when selecting an object or the like indicated by the cursor on the display 15 or when switching between ascending order and descending order at the time of search. Erase button 19
Is operated when deleting an object such as a track. The enter button 20 is operated when determining an object such as a displayed menu or a selected track. Menu / Cancel
The (MENU / CANCEL) button 21 is operated when displaying various operation menus hierarchically arranged or when canceling. The EXCHANGE button 22 is operated when automatically performing check-in processing and check-out processing on the MS 4 or PD 5.

The RECORD button 23 is a music CD
It is operated when recording to the HDD 58 while reproducing the audio data of 3. High speed record (HI SPEED
The RECORD button 24 is operated when the audio data of the music CD 3 is recorded on the HDD 58 at high speed. At this time, the voice of the audio data to be recorded is also output from the speaker 2 or the like. The stop button 25 is operated to stop the reproduction or recording that is being executed. The play / pause button 26 is operated when instructing start of play, play pause, and cancellation of play pause. Cue button 27
Is operated when the current track or the previous track is cued or rewind playback is instructed. The cue button 28 is operated to instruct the cue or the fast-forward reproduction of the next track.

Although not shown, the remote controller 7 has a power button 1 arranged on the lid 40.
Buttons having the same function as buttons such as 1 are arranged.

On the back surface of the audio server 1, as shown in FIG. 4, an AUX in terminal 31, a line out terminal 32,
A subwoofer terminal 33, a speaker (L, R) terminal 34, a reset button 35, and a DC in terminal 36 are arranged.

An audio output device (not shown) can be connected to the AUX-in terminal 31, and digital audio data or an analog audio signal from the connected audio output device can be input. An amplifier device (not shown) or the like can be connected to the line-out terminal 32, and an analog audio signal can be output to the connected amplifier device. The subwoofer terminal 33 can be connected to a subwoofer (not shown) and can output the low frequency component of the reproduced audio signal to the subwoofer.
The speaker (L, R) terminals 34 can be connected to the speaker 2 and can output reproduced audio signals to the connected speaker 2. The reset button 35 is operated when resetting the audio server 1. DC power from an AC power adapter (not shown) is supplied to the DC-in terminal 36.

As shown in FIG. 5, an open lever 41, a light receiving portion 42, a connector 43, an access lamp 44, an MS slot 45, a takeout lever 46, and a headphone terminal 47 are arranged on the front surface of the audio server 1. . The open lever 41 is slid when opening the lid 40. The light receiving unit 42 is the remote controller 7
The control signal transmitted from is received. A USB (Universal Serial Bus) terminal is provided in the connector 43, and the PD 5, external HDD, keyboard, etc. can be connected via a USB cable.

It should be noted that the connector 43 is provided with an IEEE 1394 terminal, and the PD is connected via the IEEE 1394 cable.
You may make it connect 5 etc. Or so-called
Bluetooth (trademark) or IEEE802.11b
A terminal for (so-called wireless LAN) may be provided to connect the PD 5 and the like by wireless communication.

The access lamp 44 has an MS slot 45.
Blinks when data is being read from or written to the MS 4 inserted in, the PD 5 connected to the connector 43, or the like. MS4 in the MS slot 45
Is inserted. The take-out lever 46 is the MS slot 4
It is operated when taking out the MS 4 inserted in the device 5. Headphones 47 can be connected to headphones, and can output reproduced audio signals to the connected headphones.

Next, a hardware configuration example of the audio server 1 will be described with reference to FIG. The audio server 1 includes a main CPU (Central Processing Unit) 51 that controls the entire audio server 1. The main CPU 51 has a flash ROM 52, an SDRAM 53, a USB host controller 54, and a D via a bus 66.
MA controller 55, signal processing unit 60, Ethernet
An (R) controller / connector 67 and a PCMCIA controller 68 are connected.

In the flash ROM 52, the activation is completed by the main CPU 51 immediately when the power is turned on.
In addition to TOS (Real Time Operating System) 71 (FIG. 7), firmware executed on RTOS 71 to realize various functions (Firmware, which will be described later with reference to FIG. 7),
The device ID, the encryption key, etc. are stored. SDRAM (Synchr
onous Dynamic Random Access Memory) 53 is the main C
When the PU 51 executes various processes, it temporarily stores predetermined data and programs. USB host controller 5
Reference numeral 4 controls data communication with the PD 5 or the like connected via the connector 43.

The DMA (Direct Memory Access) controller 55 includes a buffer 56, a CD-ROM drive 57, and an HDD 5.
8 and the data transfer between the encoder / decoder 59. The buffer 56 made of SDRAM or the like temporarily buffers data for which the DMA controller 55 controls transfer. The CD-ROM drive 57 reads the audio data recorded on the music CD 3 at CAV 8 times speed. The HDD 58 stores encoded data generated by the encoder / decoder 59.

The encoder / decoder 59 receives the PCM data read by the CD-ROM drive 57 and the audio data input from the AUX in terminal 31 in the 132 Kbps mode,
The ATRAC3 system of 105 Kbps mode or 66 Kbps mode is used to generate encoded data by encoding at a maximum speed of 8 times and an average speed of 5 times. Also, the encoder / decoder 5
9 decodes the encoded data stored in the HDD 58.

Further, the encoder / decoder 59 uses the DE
It has an S (Data Encryption Standard) engine,
The encoded data is encrypted and the encrypted encoded data is decrypted. The encoder / decoder 59
The encryption process and the decryption process by
9 and FIG. 100, it will be described later.

For example, the HDD 58 has a capacity of 9 gigabytes, and the encoder / decoder 59 is in the 105 Kbps mode.
When encoding with ATRAC3 method, the HDD58 has about 1
It is possible to record 00 music CD3s (60 minutes / sheet).

The signal processing unit 60 includes a MagicGate memory stick interface (hereinafter, referred to as MGMS I / F) 60-1, a watermark screen (hereinafter, WM).
Described as screen) 60-2, audio I / F6
0-3, and a sampling rate converter (hereinafter,
Described as SRC) 60-4.

The MGMS I / F 60-1 performs mutual authentication with respect to the MS 4 inserted in the MS slot 45 via the MS connector 61, and based on the result, encrypts data and encrypts the encrypted data. Perform decryption. The WM screen 60-2 detects a watermark (electronic watermark, information indicating whether copying is possible, etc.) of the SDMI standard embedded in the audio data passing through the signal processing unit 60.

The audio I / F 60-3 acquires digital audio data via the AUX in terminal 31,
Supply to SRC60-4. Also, the audio interface 60-3 has a built-in buffer 251 for storing the digital audio data transferred from the buffer 56 or the like.
(Figure 62) Buffered appropriately, then AD / DA6
Output to 2.

The SRC60-4 is an audio I / F60-
The sampling rate of the digital audio data from 3 is converted to 44.1 KHz and output to the encoder / decoder 59.

Although not shown, the signal processing unit 60 further incorporates an ATRAC3 type encoder / decoder operating at 1 × speed.

The MS connector 61 is connected to the MS 4 to be inserted.
It relays data communication with MGMS I / F 60-1. AD / D
A62 is an audio I / F 60-3 of the signal processing unit 60.
The digital audio data input from is converted into an analog audio signal and output to the line-out terminal 32, the speaker terminal 34, or the headphone terminal 47. Further, the AD / DA 62 digitizes the analog audio signal input from the AUX-in terminal 31 and encodes it.
Output to the decoder 59.

The Ethernet® controller / connector 67 controls data communication with other electronic devices via Ethernet (registered trademark). PCMCIA (Personal Comput
er Memory Card International Association) controller 68 is equipped with a PCMCIA standard IC card interface.

A display driver 63 and a sub CPU 64 are connected to the main CPU 51. The display driver 63 controls the display on the display 15. The sub CPU 64 controls the power supply unit 65, reset control of the main body, counting of the built-in clock, detection of operation on the power button 11, etc., control of the light receiving unit 42, control of AD / DA 62, especially when the power is off. And so on. The power supply unit 65 converts the DC voltage supplied from the DC IN terminal 36 into a predetermined voltage and supplies the voltage to the entire audio server 1.

Next, in order to actually perform the functions of the audio server 1 listed below, the main CPU 51 uses the flash ROM.
About the firmware read from 52 and executed,
This will be described with reference to FIG. The functions of the audio server 1 are CD ripping, CD recording, HD recording (digital input), HD recording (analog input), HD play, CD play, MS play, checkout / checkin, import, moveout / movein. The details and correspondence between the firmware and the like will be described later with reference to FIGS. 47 to 56.

The firmware has four layers, namely, an application layer (APP) 72, an upper middleware layer (UMW) 73, and a lower middleware layer.
(LMW) 74 and device driver layer (DD) 75.

The application layer 72 includes a main application (hereinafter, referred to as main APP) 7
6. Hard disk application (hereinafter referred to as HD APP) 77, CD application (hereinafter referred to as CD APP)
78), Memory Stick application (hereinafter referred to as MS APP) 79, portable device application (hereinafter referred to as PD APP) 80,
And Kana-Kanji conversion application (hereinafter, FEP (Fron
t End Processor)) 81 modules are included.

Each module of the application layer 72 corresponds to the user's operation relating to the function executable by the audio server 1, and corresponds to the upper middleware layer 7
It provides a user interface by requesting processing from the corresponding modules of 3 and controlling the display of the status of processing.

The main APP 76 controls each module of the application layer 72. For example, at startup, a startup screen is created and each module is started. The user operation notified from the input middleware 97 is accepted and the corresponding module is notified. The display data from each module is supplied to the display device driver 105. Execute switching of each module.
In response to the volume change operation from the user, the audio I
Notify the O middleware (AIO) 94. The setting value is notified to each module in response to the setup operation from the user. Holds common setting information (play mode, etc.) in each module. System control middleware that terminates each module in response to power-off operation
Request (SYSTEM) 98 to power off.

The HD APP 77 receives an operation for driving the HDD 58, notifies the hard disk middleware 82 of the operation, acquires the operation state of the hard disk middleware 82, and generates display data.

The CD APP 78 receives an operation for driving the CD-ROM drive 57, notifies the CD middleware 88 of the operation, acquires the operation state of the CD middleware 88, and generates display data.

The MS APP 79 receives an operation related to the MS 4 inserted in the MS slot 45, notifies the MS middleware 89 of the operation, acquires the operation state of the MS middleware 89, and generates display data.

The PD APP 80 accepts the operation related to the PD 5 connected to the connector 43, and the PD middleware 9
0 is notified, the operation state of the PD middleware 90 is acquired, and display data is generated.

The FEP 81 executes kana-kanji conversion when inputting the title of the music CD3 to be recorded.

The upper middleware layer 73 is composed of the following modules in which each function of the audio server 1 is modeled and mounted. That is, hard disk middleware (hereinafter referred to as HD MW) 82, CD
Middleware (hereinafter referred to as CD MW) 88, MS middleware (hereinafter referred to as MS MW) 89, and P
Each module of D middleware (hereinafter, referred to as PD MW) 90 is included.

The HD MW82 compresses the audio data of the music CD3 in cooperation with the HDCC83 and the CDMW88 which manage the encoded data stored in the HDD58, encrypts the audio data, and encrypts it.
HD PLAY85, which decodes and expands the encoded data recorded in the HDD 58 in cooperation with the CD RIPPING 84 for recording in 58 and the audio IO middleware 94, and the audio I
In cooperation with the O middleware 94, the audio data input from the AUX in terminal 31 is compressed, encrypted, and stored in the HDD5.
It is composed of C IN / C OUT 87 that controls check-in and check-out with MS 4 or PD 5 in cooperation with HD REC 86, MS MW 89 or PD MW 90 recorded in 8.

The CD MW88 is a CD device driver 10
2 by controlling the CD-ROM drive 57
Realize the function as a player. The MD MW 89 realizes a function as an MS player in cooperation with the audio IO middleware 94 and the MS file system middleware 95. The PD MW 90 controls the PD 5 by cooperating with the USB host middleware 96 and the USB host device driver 104.

In the lower middleware layer 74, the following modules, which are implemented by modeling the functions that can be shared by each module of the upper middle layer 73,
Hard disk object database middleware (hereinafter referred to as HD DB) 91, hard disk file system middleware (hereinafter referred to as HD FS)
92, MGR middleware (MGR) 93, audio IO
Middleware (AIO) 94, Memory Stick File System Middleware (MS FS) 95, USB Host Middleware (USB) 96, Input Handle Middleware (INPU)
T) 97, and system control middleware (SYS
TEM) 98 is included. Each module included in the lower middleware layer 74 is called by each module that constitutes the upper middle layer 73.

In the device driver layer (DD) 75, the following modules that model each hardware device, namely the hard disk device driver 99,
Decoder / encoder device driver 100, DMA device driver 101, CD device driver 102,
Signal processing device driver 103, USB host device driver 104, display device driver 10
5, an audio device driver 106, a key device driver 107, a power device driver 108, and a clock device driver 109. In addition,
In FIG. 7, the audio device driver 106 to the clock device driver 109 surrounded by broken lines are executed by the sub CPU 64. Each module is mainly composed of a library, and a module included in the upper middleware layer 73 or the lower middleware 74 allows the API (Application Program Interface
ace) is called.

Next, FAT (File Allo) applied to the HDD 58
A cation table type file system (data format) will be described with reference to FIGS. 8 to 20. As shown in FIG. 8, in order to specify the file recording area 121 for recording the encoded data (content data) as a file in the HDD 58 and the position where the content data recorded in the file recording area 121 is recorded. An object recording area 122 is provided in which an object including the above information is recorded.

The file management unit 123 executes all file-related processes such as file creation, ID issue for a newly created file, writing, reading, and deletion in the file recording area 121. The file management unit 123 corresponds to the HD FS 92 included in the lower middleware layer 74.

The object management unit 124 recognizes the physical position of the object in the object recording area 122, and executes writing, reading, deleting, etc. of the object. The object management unit 124 corresponds to the HD DB 91 included in the lower middleware layer 74. Note that management of the object by the database will be described later with reference to FIGS. 21 to 37.

FIG. 9 shows the logical structure of the file recording area 121. The file recording area 121 is divided into sectors having a predetermined capacity, which is the minimum unit for writing and reading in the file recording area 121. Serial sector numbers are assigned to all sectors. The file recording area 121 is composed of a FAT area composed of a predetermined number of sectors, a system area, and a plurality of clusters. A fixed-length cluster number is assigned to each cluster. The file recorded in the file recording area 121 is configured by combining a plurality of clusters.

The combined state of a plurality of clusters is FAT141.
It is recorded in a table called (FIG. 10). FAT
Although 141 is recorded in the FAT area of the file recording area 121, when the file management unit 123 operates
It is also transferred to the SDRAM 53.

FIG. 10 shows the structure of the FAT 141. The FAT 141 is composed of a FAT header 142 and a plurality of FAT entries 144 corresponding to each cluster. The header 142 includes a free cluster list start number recording area 143. In the free cluster list start number recording area 143, the head cluster number of a series of free clusters in which no data is recorded is recorded.
When there is no free cluster, -1 = 0xFFFFFFFF is recorded in the free cluster list start number recording area 143.

The FAT entry 144 has the same entry number as the cluster number given to the corresponding cluster. For example, corresponding to cluster number 1
The entry number 1 is given to the FAT entry.
Below, the FAT entry with entry number 1 is referred to as FAT entry E.
Also described as (1). FAT entry 144 is in P column 14
5 and N column 146.

In the P column 145 of the FAT entry 144, the cluster number given to the cluster connected in front of the corresponding cluster is recorded. When there is no cluster connected to the front, that is, when the corresponding cluster is the beginning of the file, 0xFFFF is set in the P column 146.
FFFF is recorded.

In the N column 146 of the FAT entry 144, the cluster number given to the cluster connected behind the corresponding cluster is recorded. When there is no cluster connected to the rear, that is, when the corresponding cluster is the end of the file, 0xFFFF is set in the N column 146.
FFFF is recorded.

For example, when only one file is recorded in the file recording area 121 in five clusters to which cluster numbers 1, 5, 6, 8 and 12 are assigned,
As shown in FIG. 11, the entry number 1 (0x00000001)
In the P column of FAT entry E (1), 0xFFFFFFFF indicating that there is no cluster connected to the front is recorded,
In the N column, the cluster number 5 (0xFFFFFFFF) given to the cluster connected to the rear is recorded.

The cluster number 1 (0x00000001) given to the cluster connected to the front is recorded in the P column of the FAT entry E (5) of the entry number 5 (0x00000005), and the backward in the N column. The cluster number 6 (0x00000006) given to the connected cluster is recorded.

FAT entry E with entry numbers 6 and 8
Recording is similarly performed on (6) and E (8).

The cluster number 8 (0x00000008) given to the cluster connected to the front is recorded in the P column of the FAT entry E (12) of the entry number 12 (0x0000000C), and the backward in the N column. 0xFFFFFFFF indicating that there is no cluster to be connected is recorded.

Free cluster list start number recording area 14
In the present case, since the series of clusters from the cluster with the cluster number (0x00000002) to the cluster number (0x00000014) is an empty cluster, the cluster number (0x00000002) indicating the beginning is recorded in 3.

FIG. 12 shows cluster numbers 1, 5, 6, 8,
It shows that one file is recorded in five clusters to which 12 is added. A size recording area 151 for recording information related to the size of the file is provided in the first cluster of the file (cluster 1 in this case). The data of the file is recorded after the second cluster (in this case, cluster 5). The size recording area 151 may be provided in the last cluster of the file (in this case, the cluster 12).

FIG. 13 shows an example of the structure of the size recording area 151. The size recording area 151 is provided with an effective size recording area 152, a final cluster number recording area 153, and an occupied cluster number recording area 154.
In the effective size recording area 152, the number of effective bytes of the last cluster (cluster 12 in this case) is recorded. Usually, the value is 1 or more, and a value equal to or smaller than the cluster size is recorded. Last cluster number recording area 153
Is the last cluster (in this case, cluster 12)
Cluster number (0x0000000C in this case) is recorded. In the occupied cluster number recording area 154, the number of clusters forming the data recording portion of the file (in this case,
4) is recorded.

Next, the process of creating a file using FAT (that is, the process of recording content data), the process of reading the file, and the reverse reading of the file (that is, the process of reading the content data from the reverse direction) will be described. This will be described with reference to the flowcharts of FIGS. Note that these processes are performed by the file management unit 12
3, ie, controlled by the HD FS 92 belonging to the lower middleware layer 74 of the firmware.

First, the file creating process will be described with reference to the flowchart of FIG. Step S
In No. 1, the HD FS 92 transfers the content data to be recorded in the HDD 58 from the CM-ROM drive 57 or the like to the buffer 56 for each cluster size (the transferred data amount is S bytes). In step S2, HD FS9
2 searches for and acquires (secures) a free cluster in the file recording area 121.

This free cluster acquisition processing is shown in FIG.
This will be described with reference to the flowchart of FIG. Step S2
1, the HD FS 92 reads the value Q recorded in the free cluster list start number recording area 143 recorded in the FAT header 141. In step S22, the HD FS 92 determines whether the value Q is -1, that is, whether there is no free cluster. Value Q is -1
If not, that is, if it is determined that there is a free cluster, the process proceeds to step S23. Step S2
In 3, the HD FS 92 reads the FAT entry E (Q) corresponding to the value Q (cluster number of free cluster).

The FAT entry E corresponding to an arbitrary cluster number X is related to the process of reading the FAT entry E (Q).
The process of reading (X) will be described with reference to the flowchart of FIG. In step S41, HD F
S92 is a known FAT at the known FAT entry start address.
The header size is added, and the product obtained by multiplying the sum (X-1) by subtracting 1 from the value X by the known entry size is added to calculate the address A. In step S42, the HD FS 92 reads the data for one entry size, starting from the address A. The description of the process of reading the FAT entry E (X) corresponding to an arbitrary cluster number X is completed.

Returning to FIG. 15, in step S24,
In the HD FS92, the value of the N column of the FAT entry E (Q) is -1 (0
xFFFFFFFF) is determined. FAT entry E
When it is determined that the value in the N column of (Q) is not -1, the process proceeds to step S25.

In step S25, the HD FS92
The value of the N column of the FAT entry E (Q) is substituted into the variable M.
In step S26, the HD FS 92 reads the FAT entry E (M) corresponding to the cluster number M. In step S27, the HD FS 92 has the FAT entry E (M).
Record -1 (0xFFFFFFFF) in the P column of.

At step S28, the HD FS 92 sets F
-1 (0xFFFFFFFF) is recorded in the N column of the AT entry E (Q), and -1 (0xFFFFFFFF) is recorded in the P column of the FAT entry E (Q). In step S29, the HD FS 92 determines that there is an empty cluster with the cluster number Q, and
Return to. This is the end of the description of the free cluster acquisition process.

When it is determined in step S24 that the value of the N column of the FAT entry E (Q) is -1, the processes of steps S25 to S27 are skipped.

If it is determined in step S22 that the value Q recorded in the free cluster list start number recording area 143 is -1, the process proceeds to step S3.
Go to 0. In step S30, the HD FS 92 returns to FIG. 14 because there is no free cluster.
However, if there is no free cluster, it is determined that the HDD 58 is full, and the file creation process of FIG. 14 ends.

Hereinafter, the free cluster having the acquired cluster number Q is replaced with the free cluster having the cluster number V, and the description will be continued. In step S3, the HD FS92
The cluster number V of the empty cluster is substituted into the variables X and A. In step S4, the HD FS 92 substitutes 0 for the occupied cluster number T. In step S5, HDFS
The 92 acquires a new free cluster similarly to the processing in step S2 described above. Let V be the cluster number of the acquired free cluster. Here, if a new free cluster cannot be acquired, this file creation process is terminated.

In step S6, the HD FS 92 substitutes the value V for the variable B. In step S7, HD FS
92 increments the occupied cluster number T by 1. In step S8, the HD FS 92 converts the cluster number B into a sector number (for example, when the sector and the cluster are associated as shown in FIG. 9, the cluster number 2 is converted into the sector numbers 28 to 35). ). The sector number corresponding to the cluster number B is determined). In step S9, the HD FS 92 records the content data buffered in step S1 in the converted sector number of the file recording area 121.

After the recording of the buffered content data is completed, in step S10, the HD FS92
Connects the cluster of cluster number B to the cluster of cluster number A (which is an empty cluster at this time).
This connection processing will be described with reference to the flowchart in FIG.

Similar to the processing described above with reference to FIG. 16, HD
The FS 92 uses the cluster number A in step S51.
Is read, and in step S52, the FAT entry E (B) corresponding to the cluster number B is read. In step S53, HD F
S92 is the cluster number B in the N column of the FAT entry E (A).
Is recorded, and the cluster number A is recorded in the P column of the FAT entry E (B). Note that the processing in step S53 is SDRAM
This is executed for FAT 141 expanded in 53. The description of the concatenation process of the cluster with cluster number A and the cluster with cluster number B is completed.

Returning to FIG. 14, in step S11,
The HD FS 92 determines whether the data amount S of the content recorded in step S9 is equal to the cluster size.
If it is determined that the data amount S of the content recorded in step S9 is equal to the cluster size, the recording of the content data to be recorded has not been completed, so the process proceeds to step S12.

In step S12, the continuation of the previously recorded content data is transferred to the buffer 56 by the cluster size. In step S13, the cluster number B is substituted for the variable A. In step S14, the HD FS 92 newly acquires a free cluster, as in the process of step S2 described above. Let V be the cluster number of the acquired free cluster. Note that step S14
Then, if a new free cluster cannot be acquired,
The process proceeds to step S17. In step S15, the HD FS 92 substitutes the value V for the variable B. In step S16, the HD FS 92 sets the occupied cluster number T to 1
Increment only.

After that, the process returns to step S8, and the subsequent processes are repeated. Then, in step S11, when it is determined that the data amount S of the content recorded in step S9 is not equal to the cluster size, the recording of the content data to be recorded is completed, so the process proceeds to step S17.

In step S17, the HD FS92
The size recording area 151 is provided in the empty cluster having the cluster number X acquired in step S2, the data amount S recorded in the last cluster is recorded in the effective size recording area 152, and the variable B is stored in the final cluster number recording area 153. The value is recorded, and the value of the variable T is recorded in the occupied cluster number recording area 154.

In step S18, step S10
File recording area 1 with FAT141 rewritten by the process
The FAT 141 recorded in the 21 FAT area is updated. As described above, a new file is created. A file identifier having the same value as the leading cluster number of the series of clusters in which the content data is recorded is issued to the created file.

Next, the reading process of a file whose file identifier is X (hereinafter referred to as file X) will be described with reference to the flowchart of FIG. In step S61, the HD FS 92 executes a search process for determining whether or not the file X exists.

The search process for the file X will be described with reference to the flowchart in FIG. In step S81, the HD FS 92 acquires the FAT entry E (X) corresponding to the entry number X. In step S82,
In HD FS92, the value in the P column of FAT entry E (X) is -1 (0
xFFFFFFFF) is determined. FAT entry E
When it is determined that the value in the P column of (X) is -1, the process proceeds to step S83. In step S83, HD
The FS 92 determines that the file X exists because the cluster with the entry number X (= cluster number X) is the first cluster in the series of clusters in which the file is recorded, and the file reading process of FIG. Return to.

On the contrary, if it is determined in step S82 that the value in the P column of the FAT entry E (X) is not -1, the process proceeds to step S84. In step S84, the HD FS 92 determines that the file X does not exist because the cluster with the entry number X (= cluster number X) is not the first cluster in the series of clusters in which the file is recorded, Returning to the file reading process of FIG. This is the end of the description of the search process for the file X.

Hereinafter, the description will be continued assuming that the file X is determined to exist in the file search process.
In step S62, the HD FS 92 has the FAT entry E.
It is determined whether the value in the N column of (X) is -1 (0xFFFFFFFF). When it is determined that the value of the N column of the FAT entry E (X) is -1, there is no data in the file X, and the reading process is ended.

In step S62, the FAT entry E
The process in which the value in the N column of (X) is not -1 is step S63.
Proceed to. In step S63, the HD FS 92 converts the cluster number X (first cluster) into a sector number. In step S64, the HD FS 92 controls the DMA controller 55 to read out the size recording area 151 recorded in the converted sector number and read the buffer 56.
To buffer. In step S64, HD
The FS 92 stores the effective size S recorded in the effective size recording area 152 of the size recording area 151 buffer-linked in step S63 (recorded in the last cluster of the series of clusters in which the file X is recorded). Read the data amount).

At step S66, the HD FS 92
The value of the N column of the FAT entry E (X) is assigned to the variable C.
In step S67, the HD FS 92 reads the FAT entry E (C) corresponding to the cluster number C, that is, the second cluster, as in the processing described above with reference to FIG. In step S68, HD F
S92 converts the cluster number C into a sector number. In step S69, the HD FS 92 controls the DMA controller 55 to read the content data of one cluster recorded in the sector of the converted sector number,
The buffer 56 is buffered.

At step S70, the HD FS 92 sets F
It is determined whether the value of the N column of the AT entry E (C) is -1 (0xFFFFFFFF). When it is determined that the value of the N column of the FAT entry E (C) is not -1, the process is step S7.
Go to 1. In step S71, the HD FS 92 uses the DMA
The controller 55 is controlled to output all the data buffered by the buffer 56 to the encoder / decoder 59 and the like. Since all the content data of the file X has not been read yet, the process proceeds to step S72. In step S72, HD FS92
Substitutes the value of column N of FAT entry E (C) into variable C. The process returns to step S67, and the subsequent processes are repeated.

After that, when it is determined in step S70 that the value of the N column of the FAT entry E (C) is -1, the reading from the last cluster in which the content data of the file X is recorded is completed. Therefore, the process proceeds to step S73. In step S73, HD F
S92 controls the DMA controller 55 to control the buffer 5
Data for the effective data size S, which is the end of the content data and is buffered by 6, is output to the encoder / decoder 59 and the like.

If it is determined that the file X does not exist in the file search process of step S61,
The process proceeds to step S74, an error determination is made,
The file reading process of the file X ends. This is the end of the description of the read processing of the file X.

Next, the reverse reading process of the file X will be described with reference to the flowchart of FIG. Here, the reverse reading process is, for example, after reproducing the content data having a reproduction time of 100 seconds for about 90 milliseconds to about 100 milliseconds, and then for about 80 milliseconds from about 80 seconds, and then This is a process that can be used when the reproduction is performed every several seconds, such that the reproduction is performed for about 100 milliseconds from the 70th second.

At step S91, the HD FS92
File identifier of file X (= X, hereinafter ID (X)
Is described) to the sector number. However, ID
(X) is the same as the cluster number of the first cluster in the series of clusters in which the file X is recorded.

In step S92, the FAT entry E (X) corresponding to the cluster X is read. Step S9
In 3, the HD FS 92 controls the DMA controller 55 to read the size recording area 151 recorded in the sector of the sector number converted in step S91 and buffer it in the buffer 56. In step S94, the HD FS 92 determines the effective size recording area 152 of the size recording area 151 buffer-linked in step S93.
From the effective size S to the final cluster number recording area 153
The final cluster number Z is read from.

In step S95, the HD FS92
It is determined whether or not the final cluster number Z and ID (X) are the same. If it is determined that the final cluster number Z and ID (X) are the same, there is no content data in the file X, and the reverse read process is terminated.

If it is determined that the final cluster number Z and ID (X) are not the same, the process proceeds to step S96. In step S96, the HD FS 92 converts the final cluster number Z into a sector number. In step S97, the HD FS 92 controls the DMA controller 55 to read the data including the tail portion of the content data recorded in the sector number converted in step S96 and buffer it in the buffer 56. In step S98, the HD FS 92 uses the DMA controller 55.
Of the data buffered by the buffer 56, that is, only the last part of the content data is output to the encoder / decoder 59 and the like.

At step S99, the HD FS92
The FAT entry E (Z) corresponding to the final cluster number Z is read. In step S100, the HD FS 92 sets F
It is determined whether the value in the P column of the AT entry E (Z) is the same as ID (X). When it is determined that the value in the P column of the FAT entry E (Z) is the same as ID (X), it means that the content data of the file X has been recorded in only the last cluster, so reverse reading is performed. The process ends.

The value in the P column of the FAT entry E (Z) is ID
If it is determined that it is not the same as (X), the process proceeds to step S101 in order to read back by one cluster from the tail end side. In step S101, HD FS
92 substitutes the value of the P column of the FAT entry E (Z) into the variable C.

In step S102, the HD FS92
Reads the FAT entry E (C) corresponding to the cluster number C. In step S103, the HD FS92
The cluster number C is converted into a sector number. Step S1
In 04, the HD FS 92 controls the DMA controller 55 to read the content data recorded in the sector number converted in step S103, and store it in the buffer 56.
To buffer. In step S105,
The HD FS 92 controls the DMA controller 55 to output the content data for one cluster buffered in the buffer 56 to the encoder / decoder 59 and the like.

In step S106, the HD FS92
Determines whether the value in the P column of the FAT entry E (C) corresponding to the cluster number C is the same as ID (X).
If it is determined that the value in the P column of the FAT entry E (C) is not the same as ID (X), it means that not all of the file X has been read, so processing is performed in order to read back one cluster. Advances to step S107. In step S107, the HD FS 92 substitutes the value in the P column of the FAT entry E (C) into the variable C. The process is step S10.
Returning to step 2, the processing after that is repeated.

Thereafter, in step S106, FAT
If it is determined that the value in the P column of the entry E (C) is the same as ID (X), it means that the file X has been read up to the beginning, and the reverse read process is terminated. that's all,
The description of the reverse reading process of the file X is finished.

As described above, the audio server 1
According to HD FS92, a fixed-length value, that is, the cluster number of the first cluster of the area in which the file is recorded, is added as the file identifier for specifying the file. It can be easily identified. Therefore, the file search time can be significantly reduced as compared with the case where the file name is not a fixed length.

Further, since the file identifier has a fixed length, the time required to search for a file can be made uniform.

According to the HD FS92 of the audio server 1, the size of the file to be recorded is not limited,
In addition to audio data, larger size data such as video data can be recorded as a file.

Further, according to the HD FS92 of the audio server 1, when recording one file over a cluster of negative and negative numbers, the cluster is used in the forward direction, so that the seek is in a fixed direction during recording or reproduction. Become. Therefore, it is possible to prevent recording omission during recording and sound skipping during reproduction.

Next, the objects corresponding to folders, albums, or tracks will be described with reference to FIGS.
Will be described with reference to. FIG. 21 shows the logical structure of the object recording area 122 in which the object is recorded. The object recording area 122 is the system area 1
61 and a plurality of chunks divided into a predetermined capacity. Objects are recorded in chunks.

In the system area 161, the header 16
2, an object type recording area 163 and an area information recording area 164. For multiple chunks,
Serial numbers 1 and later are sequentially assigned from the beginning thereof. Hereinafter, for example, a chunk assigned the number 1 is referred to as chunk 1, and a chunk assigned the number 2 is referred to as chunk 2.

The chunk is further divided into pages of a predetermined capacity. The pages constituting the chunk are serially numbered from 0 onward from the beginning. For example, the page numbered 0 is the page numbered 0 and the page numbered 1 is the numbered page. Described as page 0.

FIG. 22 shows the structure of the object type recording area 163 of the system area 161. Header 1
It is composed of 65 and T entries. T is a preset constant. An entry number recording area 166 is provided in the header 165. Entry number recording area 1
In 66, the number of entries currently registered (the maximum value is T) is recorded.

Each entry in the object type recording area 163 is provided with a size recording area 167, a basic object type number recording area 168, and a parameter recording area 169. For example, the entry t records information about the object type number t. That is, the size recording area 167 of the entry t records the size of the object having the object type number t. Entry t
In the basic object type number recording area 168 of, the basic object type number indicating the basic object type to which the object of the object type number t belongs is recorded. In the parameter recording area 169 of the entry t, information regarding the size when the size of the object with the object type number t is variable is recorded.

FIG. 23 shows the area information recording area 164 of the system area 161. Area information recording area 16
4 is composed of a bit string of the total number of pages in the object recording area 122 (a value obtained by multiplying the total number of chunks by the number of pages forming one chunk). However, FIG. 23 shows the area information recording area 164 by using a matrix of (total number of chunks) columns × (number of pages forming one chunk) rows for convenience of description. For example, in FIG.
The bit indicated by "○" in column p row is page p of chunk q.
When the page p of the chunk q is in use, 1 is recorded in the bit indicated by “◯”. Conversely, if page p of chunk q is not in use, then "
0 is recorded in the bit indicated by "".

FIG. 24 shows the lower middleware layer 74.
Object management unit 1 corresponding to HD DB91 included in
24 shows a configuration example of 24. Object management unit 124
Is an object type registration unit 171, a storage area management unit 17
2, a session management unit 173, and a cache management unit 174.

The object type registration unit 171 performs object type registration (writing to the object type recording area 163). Also, the object type registration unit 171
A response to the object type inquiry (reading from the object type recording area 163) is performed.

The storage area management unit 172 inverts a predetermined bit of the area information recording area 164. Further, the storage area management unit 172 retrieves a bit of the area information recording area 164 to search for a continuous unused area having a predetermined number of pages. Furthermore, the storage area management unit 172 issues an identifier to each object.

The session management section 173 issues a session number for the currently executing session and manages the session management information 181 (FIG. 25).
Here, the term “session” is a term indicating a process of controlling writing and reading of data.

FIG. 25 shows an example of the structure of the session management information 181. The session management information 181 corresponds to the current session number storage area 182 in which the number of sessions currently opened (hereinafter, referred to as the current session number) is stored, and corresponds to each object and holds the access right. It is composed of S entries in which session information is recorded. The maximum value and the value S of the number of current sessions are preset.

In the entry of the session management information 181, an object identifier storage area 183, a read / write session number storage area 184, read only session number storage areas 185 to 188, an object state storage area 189, a read cache address storage area 19 are included.
0, a write cache address storage area 191, and an access time storage area 192 are provided.

In the object identifier storage area 183,
Object identifier of the corresponding object (Fig. 27)
Is stored. Read / write session number storage area 1
84 stores the session number of the session having the write right for the corresponding object. The read-only session number storage areas 185 to 188 store the session numbers of the sessions having the read right for the corresponding objects. Note that a plurality of sessions having the read right to the object may exist at the same time, and FIG. 25 illustrates a case where when the user has up to four read rights, he has only one write and read right. .

In the object state storage area 189, information indicating the state of the corresponding object (“CR indicating creation”
"EATE", "UPDATE" indicating update, or "RE" indicating delete
MOVE ") is stored. The read cache address storage area 190 stores the address of the read cache for temporarily storing the read object. The write cache address storage area 191 temporarily stores the write object. The address of the write cache to be stored is stored, and the access time storage area 192 stores the last access time to the corresponding object.

The object identifier storage area 183
If there is no information to be stored in the access time storage area 192, 0 is stored.

FIG. 26 shows an example of the structure of a basic object type 1 and a basic object type 2, which are two types of basic object types of objects recorded in chunks.

The first type of basic object is shown in FIG.
As shown in FIG. 3, it is composed of an object identifier recording area 201 in which its own object identifier is recorded and an arbitrary data recording area 202 in which arbitrary data (for example, data such as the name of an object set by the user) is recorded. . The basic object type 1 includes folder list, folder, and album objects.

The second type of basic object is shown in FIG.
As shown in, an object identifier recording area 201 in which its own object identifier is recorded, an arbitrary data recording area 202 in which arbitrary data is recorded, and a file identifier in which a file identifier of a file corresponding to its own (object) is recorded It is composed of a recording area 203.
The basic object type 2 includes a track object.

As shown in FIG. 27, the object identifier recorded in the object identifier recording area 201 is composed of a chunk number, its page number, and a model number that indicate the beginning of a series of pages in which the corresponding object is stored. To be done. The type number is based on the basic object type number to which the corresponding object belongs (one of the basic object first type and the basic object second type) and the entry number of the object type recording area 163 in which the type of the corresponding object is registered. Composed.

Next, the object creating process, the object searching process, the object updating process, the stream object creating process, and the stream object searching process will be described with reference to the flowcharts of FIGS. 28 to 37. Here, the stream object is a term indicating an object, that is, a track, which has a one-to-one correspondence with the content data recorded in the file recording area 121. The stream object belongs to the basic object second type (FIG. 26 (B)). Therefore, an object that is not a stream object is a folder or album object and belongs to the basic object type 1.

Note that these processes are controlled by the object management unit 124, that is, the HD DB 91 belonging to the lower middleware layer 74 of the firmware.

First, the process of creating an object that is not a stream object will be described with reference to the flowchart of FIG. 28, taking the case of creating an object of object type number t as an example. The object type number t includes a basic type number (in this case, the basic object first type) and an entry number, as shown in FIG.

In step S121, the HD DB 91
Opens a light session. The process of opening a light session will be described with reference to the flowchart of FIG. In step S141, HD DB91
Reads the current session number stored in the current session number storage area 182 of the session management information 181, and determines whether the read current session number is smaller than a preset maximum value. When it is determined that the number of current sessions is smaller than the preset maximum value, the process proceeds to step S142.

In step S142, the HD DB 91
Increments the current session number stored in the current session number storage area 182 of the session management information 181 by 1. In step S143, the HD DB 91 opens a write session and issues the session number Z by, for example, a random number. The process returns to FIG. 28.

If it is determined in step S141 that the number of current sessions is not smaller than the preset maximum value, no more sessions can be opened, and the process proceeds to step S144.
In step S144, the HD DB 91 determines that there is an error. The session opening process is terminated and the object creating process of FIG. 28 is interrupted.

In step S122 of FIG. 28, HD D
The B 91 stores the size recording area 167 of the entry t of the object type recording area 163 in order to secure the page of the chunk in which the object of the object type number t is recorded.
From, the size of the object having the object type number t is read out, and the number of pages of the chunk corresponding to the size is calculated. The calculated number of pages is g.

In step S123, the HD DB 91
Secures an empty entry among a plurality of entries forming the session management information 181. The process of securing a free entry will be described with reference to the flowchart of FIG.

In step S151, the HD DB 91
Initializes the variable M to 1. In step S152, the HD DB 91 sets the variable M to the session management information 181.
It is determined whether or not the number S of entries that make up If it is determined that the variable M is equal to or less than the number S of entries, the process proceeds to step S153. Step S153
In the HD DB 91, the object identifier storage area 18 of the entry M forming the session management information 181
Read the value of 3. In step S154, HDDB9
1 determines whether the value of the object identifier storage area 183 of the read entry M is 0. If it is determined that the value of the object identifier storage area 183 of the entry M is 0, it can be determined that the entry M is a free entry, so the entry M is secured and the process returns to FIG. 28.

If it is determined in step S154 that the value of the object identifier storage area 183 of the entry M is not 0, the process proceeds to step S155. In step S155, the HD DB 91 increments the variable M by 1. The process returns to step S152,
The subsequent processing is repeated. After that, step S154
In the object identifier storage area 1 of entry M
The value of 83 is not determined to be 0, and step S
If it is determined in 152 that the variable M is not equal to or less than the number S of entries, there are currently no empty entries, and therefore the process proceeds to step S156 to create empty entries.

In step S156, the HD DB 91
Determines whether or not there is an entry in which the values of the values of the read / write session number storage unit 184 and the read-only session number storage units 185 to 188 are all 0 among the entries forming the session management information 181. If it is determined that such an entry exists,
The process proceeds to step S157. In step S157, the HD DB 91 determines that the read / write session number storage unit 184 and the read-only session number storage unit 18 are included.
Of the entries whose values 5 to 188 are all 0,
The entry with the smallest value in the access time storage area 192 (that is, the entry with the oldest access time) is extracted.

In step S158, the HD DB 91
Is the object identifier storage area 1 of the extracted entry
The value of the access time storage area 192 from 82 is cleared to 0, and the entry is secured as the empty entry M. The process returns to FIG. 28.

It should be noted that, in step S156, among the entries forming the session management information 181, there is no entry in which the values of the read / write session number storage unit 184 and the read-only session number storage units 185 to 188 are all 0. If it is determined that there is no free entry, the process proceeds to step S159. In step S159, the HD DB 91 determines that there is an error. The free entry securing process is completed, and FIG.
Object creation processing is interrupted.

Returning to FIG. 28, in step S124, the HD DB 91 searches the bit string of the area information recording area 164 for the bit string in which 0 is recorded continuously for g bits. The position of the beginning of the searched bit string in which 0s are recorded continuously for g bits is defined as q column and p row. In step S125, the HD DB 91 reserves the entry M
27, the object identifier OID (q, p, t) including the chunk number q, the page number p, and the object type number t is stored in the object identifier storage area 183 of FIG. The HD DB 91 also stores the session management information 18
The session number Z is stored in the read / write session number storage area 184 of the entry M of No. 1, and “CREATE” indicating the creation is recorded in the object state storage area 189.

[0187] In step S126, the HD DB 91
Secures a write cache area d in the buffer 56, which is equal to the number of pages g which is the size of the object. In step S127, the HD DB 91 stores the address of the secured write cache area d in the buffer 56 in the write cache address storage area 191 of the entry M of the session management information 181.

At step S128, the HD DB 91
Is the write cache area d secured in the buffer 56.
26A, recording of the object X of the object basic first type shown in FIG. 26A is started. As the start thereof, the object identifier recording area 2 of the write cache area d is started.
In 01, the object identifier OID (q, p, t) is recorded. In step S129, the HD DB 91 records arbitrary data of the object to be created (for example, the name of the object to be created) in the arbitrary data recording area 202 of the write cache area d.

In step S130, the HD DB 91
Waits for the input of the signal I corresponding to the user's operation. In step S131, the HD DB 91 sends the signal I commit,
That is, it is determined whether or not to confirm the session creation. If signal I is determined to be commit,
The process proceeds to step S132, and the light session Z is confirmed. On the contrary, when it is determined that the signal I is not commit, the process proceeds to step S133, and the write session Z is discarded.

The process of confirming the write session in step S132 will be described with reference to the flowchart of FIG. Note that to confirm a session is to reflect and record the recording in the object recording area 122 in creating, updating, moving, etc. of an object performed after the session is opened.

In step S171, the HD DB91
Initializes the variable M to 1. In step S172, the HD DB 91 sets the variable M to the session management information 181.
It is determined whether or not the number S of entries that make up If it is determined that the variable M is less than or equal to the number S of entries, the process proceeds to step S173. Step S173
At, the HD DB 91 reads out the value of the read / write session number storage area 184 of the entry M forming the session management information 181, and determines whether or not the value matches the session number Z. When it is determined that the value of the read / write session number storage area 184 of the entry M does not match the session number Z, an entry whose value of the read / write session number storage area 184 of the entry M and the session number Z match is searched for. , Processing is step S
Proceed to 174.

[0192] In step S174, the HD DB 91
Increments the variable M by 1. The process returns to step S172, and the subsequent processes are repeated. When it is determined in step S173 that the value of the read / write session number storage area 184 of the entry M matches the session number Z, the process proceeds to step S175. That is, the read / write session number storage area 1
Only the entry in which the session number Z is stored in 84 is extracted, and the processing from step S175 is performed.

In step S175, the HD DB 91
Reads the object identifier from the object identifier storage area 183 of the entry M in which the session number Z is stored in the read / write session number storage area 184. In step S176, the HD DB 91 reads the information J indicating the object state from the object state storage area 189 of the entry M in which the session number Z is stored in the read / write session number storage area 184. In step S176, the HD DB 91 determines that the information J indicating the object state is "CREATE", "UPTATE",
Or, it is judged whether it is "REMOVE".

If it is determined in step S177 that the information J indicating the object state is "CREATE", the process proceeds to step S178. Step S178
In the HD DB 91, the object recorded in the write cache area d secured in the buffer 56 is
It is recorded on page q of the chunk p in the object recording area 122. In step S179, the HD DB91
Records 1 in the g bits after the qth column and the pth row of the area information recording area 164.

In step S180, the HD DB 91
Is the write cache address storage area 1 of entry M
The value of 91 is set to the read cache address storage area 190
To copy. At this time, if a value other than 0 is stored in the read cache address storage area 190, the read cache area provided with the buffer 56 indicated by the value is released.

In step S181, the HD DB 91
Is the read / write session number storage area 184 of the entry M and the write cache address storage area 19
Store 0 in 1. In step S182, HD DB
91 updates the value of the access time storage area 192 of the entry M with the current time.

If it is determined in step S177 that the information J indicating the object state is "UPDATE", the process proceeds to step S183. Step S183
In the HD DB 91, the object recorded in the write cache area d secured in the buffer 56 is
It is recorded on page q of the chunk p in the object recording area 122. The process proceeds to step S180.

When it is determined in step S177 that the information J indicating the object state is "REMOVE", the process proceeds to step S184. Step S184
In the HD DB 91, q of the area information recording area 164.
0 is recorded in g bits after the column p row. Step S18
5, the HD DB 91 has a buffer 56 for the entry M.
Release the write cache and read cache that are secured in. In step S186, the HD DB 91
0 is stored in the object identifier storage area 183 to the access time storage area 192 of the entry M. The process proceeds to step S174.

After that, the subsequent processing is repeated until it is determined in step S172 that the variable M is not less than the number S of entries. If it is determined that the variable M is not less than or equal to the number S of entries, the process of confirming the write session is completed.

FIG. 32 shows the process of step S133 of FIG. 28, that is, the process of discarding the write session.
This will be described with reference to the flowchart in FIG. Step S19
In 1, the HD DB 91 initializes the variable M to 1.
In step S192, the HD DB 91 determines whether or not the variable M is equal to or less than the number S of entries forming the session management information 181. If it is determined that the variable M is equal to or less than the number S of entries, the process proceeds to step S193.

In step S193, the HD DB 91
Reads the value of the read / write session number storage area 184 of the entry M forming the session management information 181, and determines whether or not the value matches the session number Z.
Read / write session number storage area 18 of entry M
If it is determined that the value of 4 and the session number Z do not match, the process proceeds to step S194 to search for an entry in which the value of the read / write session number storage area 184 of the entry M matches the session number Z. In step S194, the HD DB 91 increments the variable M by 1. The process returns to step S192, and the subsequent processes are repeated.

If it is determined in step S193 that the value of the read / write session number storage area 184 of the entry M matches the session number Z, the process proceeds to step S195. That is, only the entry in which the session number Z is stored in the read / write session number storage area 184 is extracted, and the processing from step S195 is performed.

In step S195, the HD DB 91
Releases the write cache area secured in the buffer 56 by the entry M. In step S196,
In the HD DB 91, the object state stored in the object state storage area 189 of the entry M is “CREATE”
Object status is "CREATE"
If it is determined that it is not, the process proceeds to step S197.

In step S197, the HD DB 91
Is the read / write session number storage area 184 of the entry M and the write cache address storage area 19
Store 0 in 1. In step S198, HD DB
91 updates the value of the access time storage area 192 of the entry M with the current time. The process proceeds to step S194.

When it is determined in step S196 that the object state stored in the object state storage area 189 of the entry M is "CREATE", the process proceeds to step S199. Step S199
In the HD DB 91, the read / write session number storage area 184 and the write cache address storage area 191 of the entry M, that is, the object identifier storage area 183, the read-only session number storage areas 185 to 188, and the object state storage area 1 are stored.
0 is stored in the 89, the read cache address storage area 190, and the access time storage area 192. The process proceeds to step S194.

Thereafter, the subsequent processing is repeated until it is determined in step S192 that the variable M is not less than the number S of entries. When it is determined that the variable M is not less than the number S of entries, the process of discarding the write session is completed.

Next, regarding the object search processing,
An example of searching for an object having an object identifier OID = X (hereinafter referred to as object X) will be described with reference to the flowchart of FIG. It is assumed that the session has already been opened.

In step S201, the HD DB 91
Acquires the entry M corresponding to the object X.
The process of acquiring the entry corresponding to the object X will be described with reference to the flowchart of FIG.

[0209] In step S211, the HD DB 91
Initializes the variable M to 1. In step S212, the HD DB 91 sets the variable M to the session management information 181.
It is determined whether or not the number S of entries that make up If it is determined that the variable M is equal to or less than the number S of entries, the process proceeds to step S213.

In step S213, the HD DB 91
Reads the value of the object identifier storage area 183 of the entry M forming the session management information 181, and determines whether or not the value matches the object identifier OID = X of the object X. When it is determined that the value of the object identifier storage area 183 of the entry M does not match the object identifier OID = X of the object X, the entry whose value of the object identifier storage area 183 matches the object identifier OID = X of the object X To search for, the process proceeds to step S214.

In step S214, the HD DB 91
Increments the variable M by 1. The process returns to step S212, and the subsequent processes are repeated. If it is determined in step S213 that the value of the object identifier storage area 183 of the entry M and the object identifier OID = X of the object X match, the entry M corresponding to the object X can be acquired. Is ended, and the process returns to FIG.

The case where it is determined in step S213 that the value of the object identifier storage area 183 of the entry M does not match the object identifier OID = X of the object X continues, and in step S212,
When it is determined that the variable M is not less than the number S of entries, the process proceeds to step S215. Step S215
In, the HD DB 91 determines that there is an error, that is, the entry M corresponding to the object X cannot be acquired, and ends this processing. The process returns to FIG. 33.

Returning to FIG. 33, when the entry M corresponding to the object X can be acquired in the process of step S201, the process proceeds to step S202. Step S202
Since the HD DB 91 was able to acquire the entry M corresponding to the object X, the HD DB 91 determines that the object X exists in the buffer 56 and ends the processing.

On the contrary, if the entry M corresponding to the object X cannot be acquired in the process of step S201, the process proceeds to step S203. Step S203
In, the HD DB 91 decomposes the object identifier OID = X of the object X to obtain the chunk number, page number, and model number t of the object X in the object recording area 122 in which the object is recorded.

In step S204, the HD DB 91
Reads the value of the size recording area 167 of the entry corresponding to the model number t from the object type recording area 163, and calculates the number of pages g required for recording the object X based on the value.

In step S205, the HD DB 91
Refers to the area information storage area 164, and determines whether or not g bits in the qth row and the pth column are 1 or less. When it is determined that the g bits after the q-th row and the p-th column of the area information storage area 164 are 1, the process proceeds to step S206. Step S
In 206, the HD DB 91 sets the read cache area c corresponding to the number of pages g in the buffer 56. In step S207, the HD DB 91 copies the data recorded in the page number g after the page p of the chunk q of the object recording area 122 to the read cache area c of the buffer 56.

In step S208, the HD DB 91
Is the object identifier recorded in the portion corresponding to the object identifier recording area 201 of the data copied to the read cache area c and the object identifier X.
Are determined to match. If it is determined that they match with each other, the data cached in the read cache area c is the object X, and thus the process proceeds to step S2.
Go to 02.

If it is determined in step S208 that the object identifier X recorded in the portion corresponding to the object identifier recording area 201 of the data copied to the read cache area c does not match the object identifier X, the processing is step S209. Proceed to. In step S209, the HD DB 91 determines that the object X also does not exist in the object recording area 122 and ends the process.

Next, the update processing of the object X will be described with reference to the flowchart of FIG. Here, the update process of the object X is a process of rewriting arbitrary data of the object X.

In step S221, the HD DB 91
Establishes a write session Z, similar to the process of step S121 described above with reference to FIG. Step S
In 222, the HD DB 91 determines whether the object X is the same as the process of step S201 described above with reference to FIG.
Get entry M for.

The object X is processed in step S222.
When the entry M corresponding to is acquired, it is determined that the object X is cached in the read cache area c set in the buffer 56, and the process proceeds to step S223. In step S223, HD DB
91 determines whether or not the value of the read / write session number storage area 184 of the entry M is 0. When it is determined that the value of the read / write session number storage area 184 of the entry M is 0, the process proceeds to step S224.

At step S224, the HD DB 91
Read / write session number storage area 18 of entry M
In 4, the session number Z of the light session opened in step S221 is stored. In step S225, the HD DB 91 decomposes the object identifier OID = X of the object X to obtain the chunk number, page number, and model number t of the object X in which the object is recorded in the object recording area 122.

[0223] In step S226, the HD DB 91
Reads the value of the size recording area 167 of the entry corresponding to the model number t from the object type recording area 163, and calculates the number of pages g required for recording the object X based on the value. In step S227, the HD DB 91 sets the write cache area d corresponding to the number of pages g in the buffer 56. Step S22
In 8, the HD DB 91 stores the address of the write cache area d in the write cache address storage area 191 of the entry M.

In step S229, the HD DB 91
Copies the data in the read cache area c of the buffer 56 to the write cache area d. Step S
In 230, the HD DB 91 records the arbitrary data to be updated of the object X in the arbitrary data recording area 202 of the object X copied to the write cache area d. In step S231, the HD DB 91 stores the update information “UPDATE” in the object state storage area 189 of the entry M.

[0225] In step S232, the HD DB 91
Waits for the input of the signal I corresponding to the user's operation. In step S233, the HD DB 91 commits the signal I,
That is, it is determined whether or not to confirm the session update. If signal I is determined to be commit,
The process proceeds to step S234. In step S234, the HD DB 91 determines the write session Z, similarly to the processing in step S132 described above with reference to FIG. On the contrary, if it is determined that the signal I is not commit, the process proceeds to step S235. Step S235
At, the HD DB 91 discards the write session Z, similarly to the processing of step S133 described above with reference to FIG.

When it is determined in step S223 that the value of the read / write session number storage area 184 of the entry M is not 0, it can be determined that the object X is being updated by a session other than the session Z. The process proceeds to step S235.

In the processing of step S222,
If the entry M corresponding to the object X cannot be acquired, the processing proceeds to step S236. Step S2
In 36, the HD DB 91 secures the empty entry M, as in the process of step S123 described above with reference to FIG.

In step S237, the HD DB 91
Decomposes the object identifier OID = X of the object X to obtain the chunk number, page number, and model number t of the object X in the object recording area 122 in which the object is recorded. In step S238, the HD DB 91 deletes the size recording area 16 of the entry corresponding to the model number t from the object type recording area 163.
The value of 7 is read, and the number of pages g required to record the object X is calculated based on the value. In step S239, the HD DB 91 sets the read cache area c and the write cache area d corresponding to the number of pages g in the buffer 56.

At step S240, the HD DB 91
Is the read cache address storage area 1 of entry M
The address of the read cache area c is stored in 90, the address of the write cache area d is stored in the write cache address storage area 191 of the entry M, and the object identifier IOD = X of the object X is stored in the object identifier storage area 183 of the entry M. Store.

[0230] In step S241, the HD DB 91
Reads the data of the object X recorded up to the page number g after the page p of the chunk q of the object recording area 122, in the read cache area c of the buffer 56.
To copy. The process proceeds to step S229.

As described above, in the update processing of the file X, the data of the file X is copied from the read cache area c to the write cache area d, and the data of the file X cached in the write cache area d is rewritten. The rewritten result is recorded in the object recording area 122 by the process of confirming the session.

Next, referring to the flowchart of FIG. 36, for the process of creating the object of the track which has a one-to-one correspondence with the content data recorded in the file recording area 121, that is, the stream object of the object type number t '. Explain. The object type number t'includes the basic type number (in this case, the basic object second type) and the entry number, as shown in FIG.

[0233] In step S251, the HD DB 91
Establishes a write session, similar to the process of step S121 described above with reference to the flowchart of FIG. In step S252, the HD DB 91 selects the object type number t'from the size recording area 167 of the entry t'of the object type recording area 163 in order to secure the page of the chunk for recording the stream object of the object type number t '. Read the size of the object and calculate the number of pages in chunks corresponding to that size. The calculated number of pages is g.

[0234] In step S253, the HD DB 91
Is similar to the process of step S123 described above with reference to the flowchart of FIG.
A free entry M is secured from among the plurality of entries constituting the. In step S254, the HD DB 91 searches the bit string of the area information recording area 164 for the bit string in which 0 is recorded continuously for g bits. The position of the beginning of the searched bit string in which 0s are recorded continuously for g bits is defined as q column and p row. In step S255, HD
The DB 91 stores the object identifier OID (q, p, t ') including the chunk number q, the page number p, and the object type number t'in the object identifier storage area 183 of the secured entry M, as shown in FIG. Store. Also HD
The DB 91 stores the session number Z in the read / write session number storage area 184 of the entry M of the session management information 181, and further stores the object state storage area 1
“CREATE” indicating creation is recorded in 89.

At step S256, the HD DB 91
Is the number of pages, which is the size of the stream object.
A write cache area d equal to is secured in the buffer 56. In step S257, the HD DB 91 stores the address of the secured write cache area d in the buffer 56 in the write cache address storage area 191 of the entry M of the session management information 181.

In step S258, the HD DB 91
Is the write cache area d secured in the buffer 56.
26B, recording of the stream object X of the object basic second type shown in FIG. 26B is started. As its start, in the object identifier recording area 201 of the write cache area d, the object identifier OID (q, p, record t '). In step S259, the HD DB 91
The file identifier F of the content data created by the HD FS 92 corresponding to the stream object (the same value as the leading cluster number of the series of clusters in which this content data is recorded) is acquired. Step S26
At 0, the HD DB 91 records the file identifier F in the file identifier recording area 103 of the write cache area d.

[0237] In step S261, the HD DB 91
Starts the acquisition of arbitrary data of the stream object to be created (for example, the name of the stream object to be created). In step S262, HD DB9
1 waits until the acquisition of arbitrary data is completed. In addition, during the processing of steps S261 and S262, HD
The FS 92 creates a file of content data having the file identifier F corresponding to the stream object and records it in the file recording area 121.

In step S263, the HD DB 91
Is an arbitrary data recording area 20 of the write cache area d.
In 2, the acquired arbitrary data is recorded.

In step S264, the HD DB 91
Waits for the input of the signal I corresponding to the user's operation. In step S265, the HD DB 91 sends the signal I commit,
That is, it is determined whether or not to confirm the session creation. If signal I is determined to be commit,
The process proceeds to step S266. In step S266, the HD DB 91 confirms the write session Z, similarly to the processing in step S132 described above with reference to FIG.

On the contrary, in step S265, the signal
If it is determined that I is not commit, the process proceeds to step S267. In step S267, HD DB9
1 discards the write session Z, similar to the processing in step S133 described above with reference to FIG. In step S268, the HD DB 91 requests the HD FS 92 to delete the file F. This is the end of the description of the stream object creation processing.

Next, a process for searching for a stream object having an object identifier OID = X (hereinafter referred to as stream object X) will be described with reference to the flowchart of FIG. It is assumed that the session has already been opened.

In step S271, HD DB91
Executes the same process as the search process for the object X described above with reference to FIG. In step S272, the object type number included in the object identifier OID = X of the object X retrieved in the process of step S271 is acquired. The acquired object type number is t
And Furthermore, the HD DB 91 has an object type number t
Gets the object basic type number included in.

In step S273, the HD DB 91
Determines whether the basic object type number of the retrieved object X is the basic object second type. When it is determined that the basic object type number of the retrieved object X is the basic object second type,
Since the retrieved object X is a stream object, the process proceeds to step S274. Step S
In 274, the HD DB 91 reads the file identifier from the file identifier recording area 203 of the retrieved stream object X and supplies it to the HD FS 92.

If the object with the object identifier OID = X cannot be retrieved in step S271, the process proceeds to step S275. If it is determined in step S273 that the basic object type number of the retrieved object X is not the basic object second type, the process proceeds to step S275.
In step S275, the HD DB 91 determines that an error, that is, the stream object X does not exist, and ends the stream object search process.

Next, FIG. 38 shows the object recording area 1
22 shows a directory structure of objects recorded in No. 22. In the object recording area 122, the route 2
11, a folder list object 212, a folder object 213, an album object 214,
The track object 215 has a hierarchical structure.

The HD DB 91 can generate a plurality of folder objects 213 under the folder list object 212. A plurality of album objects 214 can be created under the folder object 213. Below the album object 214,
A plurality of track objects 215 can be created. The track object 215 corresponds to content data for one song.

Folder object 213, album object 214, and track object 215
Is an object presented to the user when selecting a music piece to be reproduced. The HD DB 91 is an object of other information (C which is not presented to the user).
A C (Content Control) object 216, etc.) can be created under the root 211, folder list object 212, or folder object 213.

Furthermore, when the HD DB 91 creates a folder object 213 under the folder list object 212, it creates the same folder list object 212.
Other objects than the folder object 213 are prohibited under. In addition, when the album object 214 is generated under the folder object 213, generation of objects other than the album object 214 under the same folder object 213 is prohibited. Further, it is prohibited to generate objects other than the track object 215 under the album object 214.

Since each object is recorded according to the above-mentioned rules, a folder group 217, an album group 218, and a track group 219 are constructed in the object recording area 122.

Next, the data format of each object will be described.

FIG. 39 shows the folder list object 2
12 data formats are shown. Since the folder list object 212 belongs to the basic object first type shown in FIG. 26A, it is composed of an object identifier recording area 201 and an arbitrary data recording area 202. In the object identifier recording area 201 of the folder list object 212, a 4-byte object identifier OID is recorded.

In the arbitrary data recording area 202 of the folder list object 212, the folder objects 2 that can be created under the folder list object 212 are created.
13 maximum value MAX (4 bytes), the number N of folder objects 213 created under the folder list object 212 (4 bytes), and the folder object 213 created under the folder list object 212. 4 × 100 showing the sequence of IDs of
The byte Folder is recorded. A reserve of 612 bytes is provided in the arbitrary data recording area 202 of the folder list object 212.

FIG. 40 shows the data format of the folder object 213. Since the folder object 213 belongs to the basic object first type shown in FIG. 26A, the object identifier recording area 20
1 and an arbitrary data recording area 202.
In the object identifier recording area 201 of the folder object 213, a 4-byte object identifier OID is recorded.

In the arbitrary data recording area 202 of the folder object 213, the folder object 213
Maximum value of album object 214 that can be created under
MAX (4 bytes), the number N of album objects 214 created under the folder object 213
(4 bytes), a 4 × 200-byte Album showing the array of IDs of the album object 214 created under the folder object 213, and a 36-byte album showing the folder name of the folder object 213.
Title is recorded. A reserve of 176 bytes is provided in the arbitrary data recording area 202 of the folder object 213.

FIG. 41 shows the data format of the album object 214. Since the album object 214 belongs to the basic object type 1 shown in FIG. 26A, the object identifier recording area 20
1 and an arbitrary data recording area 202.
In the object identifier recording area 201 of the album object 214, a 4-byte object identifier OID is recorded.

In the arbitrary data recording area 202 of the album object 214, the album object 214
Maximum value of the track object 215 that can be created under
MAX (4 bytes), the number N of track objects 215 created under the album object 214 concerned
(4 bytes), a Track of 4 × 400 bytes showing the ID sequence of the track object 215 created under the album object 214, and a 516-byte Titl showing the title name of the album object 214.
e, 260-byte Artist indicating the artist name of the album object 214, 8-byte Creation Date indicating the creation date and time of the album object 214,
Also, a 32-byte media key indicating the media key of the music CD 3 that is the source of the album object 214 is recorded. A reserve of 1660 bytes is provided in the arbitrary data recording area 202 of the album object 214.

FIG. 42 shows the data format of the track object 215. Since the track object 215 belongs to the basic object second type shown in FIG. 26B, the object identifier recording area 20
1, an arbitrary data recording area 202, and a file identifier recording area 203. A 4-byte object identifier OID is recorded in the object identifier recording area 201 of the track object 215. In the file identifier recording area 203 of the track object 215, a 4-byte SOID indicating a file identifier of content data (recorded in the file recording area 121) corresponding to one to one is recorded.

In the arbitrary data recording area 202 of the track object 215, the track object 215 concerned
A 516-byte Title indicating the title of the track, and a 260-byte Title indicating the artist name of the track object 215.
Artist, 8-byte Time indicating the playback time of the album object 214, and the track object 215
8-byte Last indicating the date and time of the last access to
Access Date and the track object 215
4-byte play counter (PC) showing the number of times
An 8-byte CreationDate indicating the production date and time of the track object 215, and a 12544-byte AC indicating the music attribute and reproduction control information (information for copyright protection) of the content data corresponding to the track object 215 are recorded. . A reserve of 980 bytes is provided in the arbitrary data recording area 202 of the track object 215.

FIG. 43 shows details of the 1255-byte AC recorded in the arbitrary data recording area 202 of the track object 215. AC is a content key
8-byte Ckey that indicates the codec, 1-byte Codec that indicates the codec identification value, and 1-byte Codec Att that indicates the codec attribute
r, 1-byte LT indicating playback restriction information, 1-byte VLD indicating validity check flag, 1-byte LCMLOGNUM indicating the number of check-out destinations, 16-byte CDI indicating codec-dependent information, content serial number 20-byte CID shown, 8-byte PBS showing playback permission start date and time, 8-byte PBE showing playback permission end date and time, extended C
1-byte XCC indicating C, 1-byte CT indicating the remaining number of playbacks, 1-byte CC indicating content control information,
A 1-byte CN indicating the number of remaining check-outs, a 40-byte SRC indicating source information, and a 48 × 256-byte LCMLOG indicating information including a device ID and a flag of the check-out destination are recorded.

[0260] In particular, in the 1-byte CC indicating the content control information, the first bit from the MSB (Most Significant Bit) side indicates the presence or absence of copyright (0: Yes, 1: No). MSB
The second bit from the side indicates the generation (0: original,
1: Other than the original) The 3rd and 4th bits from the MSB side are
Not used.

The information indicated by the 5th to 7th bits from the MSB side of CC is as follows. That is, the MSB of CC
When 010 is recorded in the 5th to 7th bits from the side, checkout permission (editing is permitted) is indicated.
When 011 is recorded in the 5th to 7th bits from the MSB side of the CC, move permission (editing in PD5 is prohibited) is indicated. 1 in the 5th to 7th bits from the MSB side of CC
When 00 is recorded, it indicates import permission (permission for editing in PD5). When 110 is recorded in the 5th to 7th bits from the MSB side of CC, import permission (editing in PD5 is prohibited) is indicated.

FIG. 44 shows a data format of content data which corresponds to the track object 215 on a one-to-one basis. The content data is 16 kilobytes AT3H indicating ATRAC3 header, and 1 indicating ATRAC3 parts.
It consists of 6 kilobytes of PRT and 16 kilobytes of AT3SU-1 to AT3SU-N each indicating a sound unit sequence.

FIG. 45 shows the data format of the CC object 216. CC object 216
Belongs to the basic object second type shown in FIG. Therefore, the CC object 216 includes the object identifier recording area 201 and the arbitrary data recording area 2
It consists of 02. In the object identifier recording area 201 of the CC object 216, a 4-byte object identifier OID is recorded.

In the arbitrary data recording area 202 of the CC object 216, a 16-byte reserve is provided. In the file identifier recording area 203 of the CC object 216, the corresponding CC data (file recording area 1
(Recorded in 21) of 4 bytes indicating the file identifier
SOID is recorded.

[0265] Fig. 46 shows the format of CC data recorded in the file recording area 121. For CC data, 10 kilobytes Cat Folder, 200 kilobytes Cat Album, and 600 kilobytes Cat Track.
Is included. The Cat Folder records information indicating the object identifier OID of the folder object 213 corresponding to the folder selected by the user. Information indicating the object identifier OID of the album object 214 corresponding to the album selected by the user is recorded in the Cat Album. Information indicating the object identifier OID of the track object 215 corresponding to the track selected by the user is recorded in the Cat Track.

Therefore, for example, when the user selects a track to be reproduced during reproduction, the Cat Tr of CC data is
The object identifier OID of the track object 215 corresponding to the selected track is determined based on ack, the corresponding file identifier is acquired from the determined track object 215, and the content data is read and reproduced.

Next, the correspondence between the data flow when each function of the audio server 1 is executed and the firmware will be described with reference to FIGS. 47 to 56.

FIG. 47 shows the flow of data when CD ripping is executed. In the CD ripping for recording the music CD3 at high speed, the digital audio data of the music CD3 is read by the CD-ROM drive 57 at the CAV 8 times speed and buffered in the buffer 56 under the control of the CD MW88. Further, under the control of the HD MW 82, the digital audio data buffered in the buffer 56 is input to the WM screen 60-2 and the watermark is detected. Next, under the control of the HDMW 82, the digital audio data buffered in the buffer 56 is encoded and encrypted by the encoder 59 at an average speed of 5 times by the ATRAC3 method, and the obtained encoded data is buffered in the buffer 56. After being ringed, it is transferred to the HDD 58 and recorded. Although illustration is omitted, during the CD ripping, a sound corresponding to the recorded digital audio data is output from the speaker 2.

FIG. 48 shows the flow of data when CD recording is executed. In the CD recording in which the music CD3 is recorded while being reproduced, the digital audio data of the music CD3 is read by the CD-ROM drive 57 at CAV 8 times speed and buffered in the buffer 56 under the control of the CD MW88. Then HDMW
Under the control of 82, the digital audio data buffered in the buffer 56 is transferred to the encoder 59.
Is encoded by ATRAC3 at an average speed of 5 times and encrypted, and the obtained encoded data is stored in the buffer 5
After being buffered in 6, it is transferred to the HDD 58 and recorded. In addition, the buffer 5 is controlled by the HD MW82.
The audio data buffered in 6 is supplied to the WM screen 60-2 and the watermark is detected.

On the other hand, the buffered digital audio data for the monitor sound is HD MW8
Under the control of No. 2, after being temporarily recorded in the ring buffer 241 (FIG. 61) provided in the HDD 58, it is read and input to the audio I / F 60-3. Then AIO
By the control of MW94, the digital audio data is
It is transferred to the D / A 62 and converted into an analog form, and the corresponding sound is output from the speaker 2.

Details of CD ripping and CD recording will be described later with reference to FIGS. 57 to 70.

FIG. 49 shows the flow of data when HD recording is performed on a digital input. H to encode the digital input and record it in HDD58
In D recording, AUX is controlled by AIO MW94.
The digital audio data input from the IN terminal 31 is supplied to the encoder 59 via the signal processing unit 60. Next, under the control of the HD MW 82, the digital audio data is encoded and encrypted by the encoder 59 according to the ATRAC3 system, and the obtained encoded data is transferred to the buffer 56 and then to the HDD 58 for recording. It Also, by controlling the HD MW82,
The watermark is detected on the WM screen 60-2 of the signal processing unit 60. Furthermore, by the control of AIO MW94,
The digital audio data is transferred to the D / A 62 by the audio I / F 60-3 of the signal processing unit 60, converted into an analog signal, and output from the speaker 2.

FIG. 50 shows the flow of data when HD recording is performed on an analog input. HD that encodes analog input and records it in HDD58
In recording, under the control of the AIO MW94, the analog audio data input from the AUX in terminal 31 is digitized by the A / D 62 and supplied to the encoder 59. Next, under the control of the HD MW82, the digital audio data is ATRAC by the encoder 59.
After being encoded and encrypted by the three methods, the obtained encoded data is transferred to the buffer 56 and then transferred to the HDD 58 for recording. Further, the watermark is detected from the digital output of the A / D 62 by the WM screen 60-2 under the control of the HD MW 82. Further, under the control of AIO MW94, the analog audio data input from the AUX in terminal 31 is output from the speaker 2.

FIG. 51 shows the flow of data when HD play is executed. In HD play that reproduces the encoded data of the HDD 58, the HDD 5 is controlled by the HD MW82.
The coded data read from 8 is buffered in the buffer 56 and then decoded and decoded by the decoder 59. The obtained digital audio data is buffered in the buffer 56 and then transferred to the audio I / F 60-3. Next, under the control of the AIO MW94, the digital audio data is transferred to the D / A 62 by the audio I / F 60-3, converted into an analog signal, and output from the speaker 2.

FIG. 52 shows the flow of data when CD play is executed. In the CD play for playing the music CD3, the digital audio data of the music CD3 is read by the CD-ROM drive 57, buffered in the buffer 56, and transferred to the audio I / F 60-3 under the control of the CD MW88. To be done. Then AI
Under the control of the OMW 94, the digital audio data is transferred to the D / A 62 by the audio I / F 60-3, converted into an analog signal, and output from the speaker 2.

FIG. 53 shows a data flow when the MS play is executed. In the MS play for reproducing the encoded data of MS4, as shown in FIG.
By the control of 89, the encoded data of MS4 is MGMS I / F.
60-1, is decrypted after mutual authentication by the MGMS I / F 60-1, and is decrypted by the decoder incorporated in the signal processing unit 60. Next, under the control of the AIO MW94, the digital audio data obtained as a result of decoding by the audio I / F 60-3 is transferred to the D / A 62, converted into an analog signal, and output from the speaker 2.

Alternatively, as shown in FIG.
Under the control of 89, the encoded data is read from the MS 4 and supplied to the MGMS I / F 60-1, and the MGMS I / F 60-1 decodes it after mutual authentication. The combined encoded data is
Digital audio data obtained by being buffered in the buffer 56 and decoded by the decoder 59 is output to the D / A 62 via the buffer 56.
Next, under the control of the AIO MW94, the audio data analogized by the D / A 62 is output from the speaker 2.

FIG. 54 shows the data flow when the MS checkout / moveout is executed. HDD
In the MS checkout for copying the encoded data of 58 to the MS4 and the moveout for moving the encoded data of the HDD58 to the MS4, the HDD5 is controlled by the control of the HD MW82.
The coded data read from 8 is buffered in the buffer 56. Next, under the control of MS MW89,
The buffered coded data is MGMS I / F60
-1 and recorded in MS4. The check-out and move-out will be described later in detail.

FIG. 55 shows the data flow when the MS import / move-in is executed. In the MS import / move-in in which the encoded data of MS4 is moved to the HDD 58, the encoded data of MS4 is transferred to the buffer 56 via the MGMS I / F 60-1 under the control of the MS MW89. Next, under the control of the HD MW 82, the buffered encoded data is transferred to the HDD 58 and recorded. The import / move-in will be described in detail later.

FIG. 56 shows the flow of data when PD checkout is executed. In PD checkout that copies the encoded data of HDD58 to PD5, HD
Under the control of the MW 82, the encoded data read from the HDD 58 is buffered in the buffer 56, then decoded by the encoder / decoder 59, and again PD
It is encrypted for 5 and buffered in the buffer 56. Next, under the control of the PD MW90, the buffered encoded data is transferred to the USB host controller 5
4, and is recorded on the PD 5 via the USB connector 43.

Details of CD ripping and CD recording will be described with reference to FIGS. 57 to 70. The CD ripping process is a process executed when the user presses the high speed recording button 24. The CD recording process is a process executed when the user presses the recording button 23.

The difference between CD ripping and CD recording will be described with reference to FIGS. 57 and 58.
FIG. 57 (A) shows a period of monitor audio output in CD ripping. FIG. 57B shows the period of the recording process (the process of encoding and recording) in the CD ripping. FIG. 58A shows a period of monitor audio output in CD recording. Fig. 58
(B) shows the period of the recording process (encoding and recording process) in CD recording.

As is clear from comparison between FIG. 57 (B) and FIG. 58 (B), in CD ripping and CD recording, the total time required for the recording processing is the same. That is, audio data (PCM data) of music CD3
Is encoded by the ATRAC3 system and recorded in the HDD 58 at an average speed of 5 times the reproduction speed of the audio data.

[0284] For example, there are 6 songs whose playback time is 10 minutes.
Music CD with songs recorded and total playback time of 60 minutes
When 3 is recorded by CD ripping or CD recording, it takes about 2 minutes per song and is sequentially recorded.

[0285] The difference between CD ripping and CD recording lies in the output period of the monitor sound.

In the case of CD ripping, the monitor sound is output only during the period when the corresponding audio data is recorded. In the example of the music CD3 described above, the sound of about 2 minutes from the beginning of the first song is output at the normal reproduction speed, and then the sound of about 2 minutes from the beginning of the second song is output at the normal speed. After that, the voice for about two minutes from the beginning of each song is output at a normal speed. Therefore, simultaneously with the end of the recording process, the monitor voice output is also ended.

In the case of CD recording, the monitor sound is output regardless of the progress of the recording process of the corresponding audio data. In the example of the music CD3 described above, the first
All the audio of the song is output at the normal playback speed, then
All voices of the second song are output at normal speed,
All audio for each song is output at normal speed. Therefore, even if the recording process is completed, the monitor audio output of the corresponding audio data is continued until the end of the final sixth song.

The CD ripping and the CD recording can be switched appropriately during the process.

Next, FIG. 59 shows CD ripping or C
The state of the buffer 56 when D recording is executed is shown. In the buffer 56, a PCM data read buffer 231 for buffering uncoded audio data (PCM data) read from the music CD 3, and encoded and encrypted by the encoder / decoder 59. An encoded data buffer 232 is provided for buffering encoded data.

FIG. 60 shows the PCM provided in the buffer 56.
The state transitions of the data read buffer 231, the encoded data buffer 232, and the PCM data reproduction buffer 251 incorporated in the audio I / F 60-3 are shown. The PCM data reading buffer 231, the encoded data buffer 232, and the PCM data reproducing buffer 251 respectively have an initial writable state, a writing state that transitions when data writing is started,
The state is either a readable state that transitions when data writing is completed, or a reading in progress state that transitions when data reading is started. It should be noted that when the reading of data is completed from the reading state, the state returns to the writable state.

Next, FIG. 61 shows CD ripping or C
When D recording is executed
The structure of a ring buffer 241 provided in the HDD 58 for buffering PCM data is shown.

A ring buffer 241 having a predetermined capacity (address 0 to address max for convenience of explanation)
Is a read pointer 2 indicating the read start address.
42 and the write pointer 243 indicating the write start address are set. The ring buffer 241 has a readable area 244 from the address indicated by the read pointer 242 to the address indicated by the write pointer 243 in the forward direction, and a writable area from the address indicated by the write pointer 243 to the address indicated by the read pointer 242 in the forward direction. It is divided into areas 245. The capacity of the readable area 244 is called a read margin. The capacity of the writable area 245 is called a write margin.

FIG. 62 shows a data flow between buffers in CD ripping and CD recording. CD-ROM drive 5 for PCM data of music CD3
PCM read by 7 and provided in buffer 56
It is buffered in the data read buffer 231. The PCM data buffered in the PCM data read buffer 231 is transferred to the encoder / decoder 59, encoded and encrypted. The obtained encoded data is buffered in the encoded data buffer 232 provided in the buffer 56. The encoded data buffered in the encoded data buffer 232 is stored in the HDD
58 and is recorded in the file recording area 121.

On the other hand, the PCM data read buffer 231
The buffered PCM data is transferred to the HDD 58 and buffered in the ring buffer 241 provided in the HDD 58. The PCM data buffered in the ring buffer 241 is transferred to the PCM data reproduction buffer 251 built in the audio I / F 60-3 and buffered, and then converted into an analog signal by the AD / DA 62 and output from the speaker 2. To be done.

Next, the recording speed setting processing relating to CD ripping and CD recording will be described with reference to the flowchart in FIG. This recording speed setting process is performed while the music CD 3 is selected as the sound source, that is, the music CD 3 is attached to the CD-ROM drive 57,
While the CD is selected by the function button 12, it is repeatedly executed.

[0296] In step S281, the input handle middleware 97 starts monitoring operation of various buttons by the user. In step S282, the input handle middleware 97 waits until the user operates the various buttons, and when it is determined that the user operates the various buttons, notifies the main APP 76 of the information. The main APP 76 determines whether the record button 23 is operated. If it is determined that the operation is on the record button 23, the process proceeds to step S283.

[0297] In step S283, the main APP7
6 shows that HD APP7
Notify 7. The HD APP 77 notifies the CD RIPPING 84 of the HD MW 82 that the record button 23 has been operated. The CD RIPPING 84 sets the high-speed recording flag provided in the SDRAM 53 or the like to OFF. The process returns to step S281.

If it is determined in step S282 that the user has operated various buttons, and it is determined that this is not an operation on the record button 23, the process proceeds to step S284. Step S28
In 4, the main APP 76 determines whether the high speed record button 24 is operated. If it is determined that the operation is performed on the high speed record button 24, the process proceeds to step S285.

[0299] In step S285, the main APP7
6 notifies the HD APP 77 that the high speed record button 24 has been operated. HD APP77 indicates that the HD MW82 has operated the high speed record button 24.
CD RIPPING 84 of. CD RIPPING 84 sets the high speed recording flag to ON. The process returns to step S281.

If it is determined in step S284 that the high speed record button 24 is not operated, the process returns to step S281.

By the recording speed setting process described above, when the high speed record button 24 is operated and the high speed recording flag is turned on, the CD ripping as shown in FIG. 57 is executed. On the contrary, when the record button 23 is operated and the high speed recording flag is turned off, the CD recording as shown in FIG. 58 is executed. Note that switching from CD ripping to CD recording, and conversely switching from CD recording to CD ripping can be performed at any timing in response to a user's button operation.

Next, the CD recording process will be described with reference to the flowchart in FIG. This CD recording process is a process controlled by the CD RIPPING 84 included in the HD MW82. After the music CD 3 is mounted and the function button 12 is operated to set the sound source to CD, the record button 23 or the high Speed button 2
It is started when 4 is operated.

In step S291, while the user is in the recording paused state by operating the record button 23 or the high speed button 24, the music C
Select the song to be recorded from D3. Specifically, the cursor button 17 is operated to select a song from the songs recorded on the music CD 3, and the enter button 20 is operated to confirm the song selection. By repeating this series of operations,
Select all songs to be recorded. If no song selection operation is performed, all songs recorded on the music CD 3 have been selected.

[0304] When the user finishes selecting the music, he / she plays /
The pause button 26 is operated. The process is step S29.
Go to 2.

In step S292, CD RIPPING8
Reference numeral 4 initializes ring buffer information including information such as a read start address indicated by the read pointer 242 set in the ring buffer 241. This ring buffer information initialization processing will be described with reference to the flowchart in FIG. In step S301, CD RIP
The PING 84 sets the read start address indicated by the read pointer 242 and the write start address indicated by the write pointer 243 to the address 0 of the ring buffer 241.
Set to. Further, the read margin of the ring buffer 241 is set to 0, and the write margin is set to the maximum value.
Set to max. This is the end of the description of the ring buffer information initialization process.

Returning to FIG. In step S293, the CD RIPPING 84 sequentially selects one of the songs selected in step S291 and executes a recording process for one song. The recording process for one song will be described with reference to the flowchart in FIG. In step S311, the CD
By requesting the CD MW 88, the RIPPING 84 can write the PCM data of the music recorded on the music CD 3 for each predetermined amount of data (for example, for 2 seconds) to a writable PC.
Buffer the M data read buffer 231. When the writing (buffering) of the PCM data of a predetermined data amount is completed, the state of the PCM data read buffer 231 transits to the readable state.

[0307] In step S312, CD RIPPING8
Reference numeral 4 causes the encoder / decoder 59 to encode (encode and encrypt) the PCM data of a predetermined data amount buffered in the PCM data read buffer 231. PCM data read buffer 23
When the reading of the PCM data of a predetermined data amount from 1 is completed, the state of the PCM data read buffer 231 transits to the writable state.

Further, the CD RIPPING 84 starts monitor sound output processing. The monitor sound output process is shown in FIG.
This will be described later with reference to FIG.

[0309] In step S313, CD RIPPING8
Reference numeral 4 causes the encoded data of a predetermined data amount obtained by encoding to be buffered in the encoded data buffer 232 in the writable state of the buffer 56. When the writing (buffering) of the encoded data of a predetermined data amount (for example, 2 seconds) is completed, the state of the encoded data buffer 232 transits to the readable state.

At step S314, CD RIPPING8
Reference numeral 4 records the encoded data of a predetermined data amount buffered in the encoded data buffer 232 in the file recording area 121 of the HDD 58. The process of recording encoded data in the file recording area 121 by a predetermined amount of data corresponds to the file creation process described above with reference to FIG. Further, the object creating process described above with reference to FIG. 28 is also performed.

In step S315, CD RIPPING8
4 determines whether or not the encoded data for one song is recorded. If it is determined that the encoded data for one song is not recorded, the process returns to step S311 and the subsequent processes are repeated. Thereafter, when it is determined in step S315 that the encoded data for one song has been recorded, the recording process for the one song is terminated.

After the recording process for one music piece is executed as described above, the process returns to step S294 in FIG. In step S294, the CD RIPPING 84 determines whether all the songs selected in step S291 have been recorded. When it is determined that all the selected songs have not been recorded, the process returns to 293, and the recording process for one song for the next song is performed.

Thereafter, if it is determined in step S294 that all the selected songs have been recorded, this C
The D recording process is ended.

Here, the monitor sound output processing started in step S312 will be described with reference to the flowchart in FIG. In step S321,
The CD RIPPING 84 determines whether or not the high speed recording flag is on. If it is determined that the high-speed recording flag is on, the process proceeds to 322.

In step S322, CD RIPPING8
Step 4 determines whether or not the recording process for one piece of music for the corresponding PCM data has been completed. If it is determined that the recording process for one song for the corresponding PCM data is not completed, the process proceeds to step S323 in order to output the monitor sound of the PCM data during which the recording process for one song is being executed.

In step S323, CD RIPPING8
4 starts the writing process of the PCM data buffered in the PCM data reading buffer 231 with respect to the link buffer 241. Without waiting for the end of the processing in step S323, in step S324, the CD
RIPPING84 is a PC recorded in the link buffer 241.
Start the M data read process.

The write processing to the ring buffer 241 in step S323 will be described with reference to the flowchart in FIG.

At step S331, CD RIPPING8
Step 4 determines whether or not the high speed recording flag is on. If it is determined that the high speed recording flag is on, the process proceeds to 332. In step S332, the CD RIPPING 84 executes the ring buffer information initialization process described above with reference to FIG.

At step S333, CD RIPPING8
4 is a writable area 24 after the write start address indicated by the write pointer 243 of the link buffer information.
At 5, the writing of the PCM data recorded in the PCM data reading buffer 231 is started. Step S33
4, the CD RIPPING 84 advances the value of the write start address indicated by the write pointer 243 included in the link buffer information in the forward direction by the amount of the PCM data written in step S333, and correspondingly, the write margin and the read margin. Update the value of.

If it is determined at step S331 that the high speed recording flag is not on, then the processing advances to 335. In step S335, the CD RIP
By referring to the ring buffer information, the PING 84 determines whether or not the size of the PCM data recorded in the PCM data read buffer 231 is less than or equal to the write margin of the ring buffer 241. If it is determined that the size of the PCM data recorded in the PCM data read buffer 231 is less than or equal to the write margin of the ring buffer 241, the process proceeds to step S333.

If it is determined in step S335 that the size of the PCM data recorded in the PCM data read buffer 231 is not less than or equal to the write margin of the ring buffer 241, the process proceeds to step S3.
After that, by returning to step 31 and changing the recording speed setting by the user, it is determined in step S331 that the high-speed recording flag is on, or the write margin of the ring buffer 241 is increased. The processes of steps S331 and S335 are repeated until it is determined in step S335 that the size of the PCM data recorded in the PCM data read buffer 231 is not less than or equal to the write margin of the ring buffer 241. This is the end of the description of the write processing for the ring buffer 241.

The reading process from the ring buffer 241 in step S324 will be described with reference to the flowchart in FIG. In step S341, the CDRIPPING 84 determines whether or not the PCM data reproducing buffer 251 incorporated in the audio I / F 60-3 is in the writable state, and determines that the PCM data reproducing buffer is in the writable state. Wait until.
When it is determined that the PCM data reproducing buffer is in the writable state, the process proceeds to step S342.

In step S342, CD RIPPING8
4 is a read pointer 242 of the ring buffer 241.
Ring buffer 2 according to the read start address indicated by
The PCM data recorded in the readable area 244 of 41 is read and written in the PCM data reproducing buffer 251.

In step S343, CD RIPPING8
4 is a read pointer 2 included in the link buffer information corresponding to the PCM data read in step S342.
The value of the read start address indicated by 42 is advanced in the forward direction,
Correspondingly, the values of the write margin and the read margin are updated.

At step S344, CD RIPPING8
4 shifts the PCM data reproducing buffer 251 to the readable state. This is the end of the description of the read processing from the ring buffer 241.

Returning to FIG. 67. In step S325, the AIO MW94 sets the PCM data buffered in the PCM data reproduction buffer 251 to AD / DA6.
2 to output. The AD / DA 62 starts reproduction of the input PCM data and causes the speaker 2 to output a corresponding sound.

In step S326, CD RIPPING8
Step 4 determines whether or not the reproduction of the PCM data for one song is completed. If it is determined that the reproduction of one piece of PCM data has not ended, the process returns to step S321, and the subsequent processing is repeated. In step S326, the reproduction of one piece of PCM data has not ended. If it is determined that the monitor sound output process is terminated.

If it is determined in step S322 that the recording process for one tune for the corresponding PCM data has been completed, this monitor audio output process is immediately stopped. This is the end of the description of the CD recording process.

Incidentally, in the process of the CD recording process, the user operates the recording button 23 or the high speed recording button 24, and at any timing, from CD ripping to CD recording, conversely from CD recording to CD ripping. You can switch.

FIG. 70 shows a display example of the display 15 when CD ripping is executed. FIG. 70
(A) is a display example of information relating to recording settings, which is displayed immediately before recording is started. At this time, the display 15 is provided with display areas 261 to 267. In this display example, the display area 261 displays information indicating the recording source and the recording destination. Display area 262
Indicates that information regarding the recording setting is displayed. In the display area 263, the folder name indicating the storage location is displayed. In the display area 264, the album name and artist name of the album to be recorded are displayed. In the display area 265, the bit rate at the time of recording is displayed. The display area 266 displays the recording level at the time of recording. In the display area 267, it is displayed that recording is started by pressing the play / pause button 26. The recording level during recording is displayed.

FIG. 70B shows an example of display during recording. At this time, on the display 15,
Display areas 271 to 278 are provided. In this display example, the display area 271 displays information indicating the recording source and the recording destination. In the display area 272, the character "high-speed recording", which indicates that CD ripping is in progress, blinks. In the display area 273, the album name of the song being recorded and the artist name are displayed. In the display area 274, the song number of the song being recorded on the music CD 3 is displayed. In the display area 275, the elapsed playback time of the song being recorded is displayed. In the display area 276, music C
The remaining playback time of D3 is displayed. In the display area 277, a progress bar 279 whose length changes in proportion to the recording progress with respect to the total number of recorded songs is displayed. The display area 278 shows the total number of songs to be recorded and the number of songs already recorded or being recorded.

For example, when CD ripping is performed for all the songs of an album whose playback time is 60 minutes, the recording is performed at about 5 times speed. Therefore, the length of the progress bar 279 displayed in the display area 277 is equal to that of the recording. The length gradually increases from the start, and the length occupies the entire display area 277 in about 12 minutes.

The length of the progress bar 279 in the display area 277 may be extended in proportion to the elapsed playback time of the music, instead of being adjusted to the progress of recording.

Next, a method of reproducing the content data recorded in the HDD 58 will be described with reference to FIGS. 71 to 77. As described above, in the audio server 1, the music recorded in the music CD 3 is encoded and the content data is recorded in the HDD 58 as a file. However, when designating the music to be reproduced, it is not a file but a hierarchy. Let the user specify the objects for the folders, albums, and tracks that make up the structure.

By designating the entire HDD, an arbitrary folder, or an arbitrary album as the reproduction area, it is possible to designate a plurality of songs as the songs to be reproduced collectively. The reproduction of the music is realized by decoding the content data corresponding to the tracks included in the playlist created based on the specified reproduction area.

FIG. 71 shows an example of the reproduction area. When the entire HDD enclosed by the broken line 281 is designated as the play area, as shown in FIG.
All track numbers in the HDD 58 are registered.

When the my select folder F1 surrounded by the broken line 282 is designated as the reproduction area, as shown in FIG. 73, the album numbers of all the albums belonging to the my select folder F1 are registered in the playlist. .

When the album A1 of the my select folder F1 surrounded by the broken line 283 is designated as the reproduction area,
As shown in FIG. 74, track numbers of all tracks belonging to the album A1 of the my select folder F1 are registered in the playlist.

When the track T1 of the album A1 belonging to the temporary folder F2 is designated as a music piece to be reproduced, as shown in FIG. 75, the track T1 of the album A1 belonging to the temporary folder F2 is registered in the playlist.

Next, the processing for creating a play list corresponding to the designated play area will be described with reference to the flowchart in FIG.

This playlist creation processing is performed by the HD MW82.
This is a process controlled by the HD PLAY85 included in, and the sound source is set to H by operating the function button 12.
Started when set to DD.

[0342] In step S351, HD PLAY85
Determines whether the hierarchy of the object indicating the reproduction area selected by the user is the entire HDD. If it is determined that the hierarchy of the selected object is not the entire HDD, the process proceeds to step S352. The user selects a reproduction area by operating a reproduction area switching button (not shown) provided on the remote controller 7, or by using the cursor button 17, the enter button 20, and the menu provided on the lid 40. / This is performed by pressing the cancel button 21 or the like in a predetermined order.

[0343] In step S352, the HD PLAY85
Determines whether the hierarchy of the object selected by the user is a folder. If it is determined that the hierarchy of the selected object is not a folder, the process proceeds to step S353.

[0344] In step S353, HD PLAY85
Determines that the hierarchy of the object selected by the user is the album, and proceeds to step S354.

[0345] In step S354, the HD PLAY85
Determines whether the play / pause button 26 has been operated. If it is determined that the play / pause button 26 has been operated, the process proceeds to step S355. In step S355, the HD PLAY 85 determines whether or not the playlist corresponding to the layer of the selected object is already formed. If it is determined that the playlist is not already formed, the process proceeds to step S356. If it is determined that it has been completed, step S356 is skipped.

[0346] In step S356, the HD PLAY85
Creates a playlist corresponding to the hierarchy of the selected object.

In step S354, the reproduction /
If it is determined that the pause button 26 has not been operated, the process returns to step S351, and the subsequent processes are repeated.

If it is determined in step S351 that the hierarchy of the selected object is the entire HDD, or if it is determined in step S352 that the hierarchy of the selected object is a folder, The process proceeds to step S354. This is the end of the description of the playlist creation processing.

[0349] A plurality of playlists corresponding to various supposed playback areas are created in advance and recorded in a predetermined location, and when the playback area is designated by the user, the playlist is created and recorded in advance. The corresponding playlist may be read out from the created playlists.

Next, with reference to the flow chart of FIG. 77, a description will be given of the reproducing process executed after the completion of the above-mentioned play list creating process, taking as an example the case where the play mode is set to repeat all songs.

[0351] In step S361, the HD PLAY85
Determines whether or not the end of reproduction is instructed by operating the stop button 25. If it is determined that the end of reproduction has not been instructed, the process proceeds to step S362.
Proceed to. In step S362, the HD PLAY85
1 out of all tracks included in the playlist
Specify each track as a playback track.

[0352] In step S363, the HD PLAY85
Reproduces the content data corresponding to the reproduction track. Specifically, the track object corresponding to the reproduction track is specified based on the CC data, and the file identifier recording area 203 of the specified track object is specified.
The file identifier of the corresponding content data is specified based on the value of, and the content data is read based on the specified file identifier (= cluster number of the file recording area 121). Next, the read content data is decoded and output.

After the reproduction of the content data corresponding to the reproduction track is completed, the process returns to step S361,
The subsequent processing is repeated. Then, step S361
When it is determined that the end of the reproduction is instructed by operating the stop button 25, the reproduction process in the case where the reproduction mode is the all-track repeat is ended.

In the reproduction modes other than the all-track repeat, the method of designating the reproduction area and the reproduction track is different, and the processing procedure is the same.

Next, the process of moving out the content data recorded in the HDD 58 of the audio server 1 to the MS 4 will be described with reference to FIGS. 78 to 81.

Here, the process of moving out the content data recorded in the HDD 58 to the MS 4 is the HDD
This is a series of processes for deleting the content data recorded in the HDD 58 after copying the content data recorded in 58 to the MS 4.

The move-out process will be described with reference to the flowchart in FIG. The move-out process is controlled by the C IN / C OUT 87 of the HD MW 82.

This move-out process is performed in the MS slot 4
5. With MS4 inserted in 5, the user operates the menu / cancel button 21 to display the menu, operates the cursor button 17 to select “Edit”, and then operates the enter button 20 to edit. After displaying the menu and operating the cursor button 17 to select "Move out", operating the enter button 20 and operating the cursor button 17 and select button 18 to select the track to move out. The operation is started when the enter key 20 is operated to display a list of tracks to be moved out and the enter key 20 is operated.

[0359] In step S371, the MS MW89
Requests the C IN / C OUT 87 to copy the move-out content data recorded in the HDD 58 to the MS 4 as right invalid data (unreproducible data). In order to make the data invalid, the flag indicating the presence or absence of the right, which is included in the attribute information of the content data, is turned off.

In step S372, C IN / C OUT8
7 generates move-out history information indicating that the move-out process has started and records it in the HDD 58. The moveout history information includes information that identifies tracks to be moved out. In step S373, C IN
/ C OUT87 turns off the flag indicating whether or not the content data recorded in the HDD 58 has the right,
The content data of is the right invalid data.

In step S374, the MS MW89
Turns on a flag indicating whether or not the content data copied to the MS 4 has the right, and sets the content data of the MS 4 as right valid data.

In step S375, C IN / C OUT8
7 deletes the content data recorded in the HDD 58. In step S376, C IN / C OUT 87
Deletes the moveout history information created in the process of step S372.

Steps S371 to S37 described above
The process of 6 is a move-out process of one content data corresponding to one track, and the processes of steps S371 to S376 are performed on all the selected tracks.

If the move-out process is interrupted due to the power being cut off in the middle of the move-out process, the recovery process is executed after the power is restored to compensate for it. The return process will be described later with reference to FIGS. 86 to 88.

FIG. 79 shows the state transition of the moveout process. State 1 is a state before the moveout process is started. That is, the HDD of the audio server 1
Content data is recorded in 58, and the content data in the HDD 58 is in a state in which the right is valid.

The state 2 is the state after the process of step S371 is performed. That is, the audio server 1
By copying the content data recorded in the HDD 58 to the MS 4, the content data is recorded in both the HDD 58 and the MS 4, and the content data in the HDD 58 is valid and valid.
This shows a state in which the content data of MS4 is invalid.

State 3 is a state after the process of step S373 is performed. That is, in a state where the content data is recorded in both the HDD 58 and the MS 4,
Further, the content data of the HDD 58 and the content data of the MS 4 are in a state where the right is invalid.

State 4 is a state after the processing of step S374 is performed. That is, in a state where the content data is recorded in both the HDD 58 and the MS 4,
In addition, the content data of the HDD 58 is invalid and the content data of the MS 4 is valid.

State 5 is a state after the process of step S375 is performed. That is, the content data in the HDD 58 is erased so that the content data is recorded only in the MS 4 and the content data in the MS 4 is right-valid.

FIG. 80 shows a display example of the display 15 when selecting a track to be moved out.
Only the songs that can be moved out are displayed on the display 15.

FIG. 81 shows a display example of the display 15 during the move-out process. In the display area 291 of the display 15, the character "Move out" indicating that the move out process is being executed is displayed in blinking. Next to the track where the moveout was completed,
A check mark 292 is displayed. Display area 293
Contains information indicating the progress of the move-out process (the number of tracks that are in the process of being moved out or completed).
The total number of tracks to move out) is displayed.

Next, the process of moving the content data recorded in the MS 4 into the HDD 58 of the audio server 1 will be described with reference to FIGS. 82 to 81.

Here, the process of moving in the content data recorded in the MS 4 to the HDD 58 is the MS 4
After copying the content data recorded on the HDD 58 to the HDD 58, the content data recorded on the MS 4 is deleted.

The move-in process will be described with reference to the flowchart in FIG. The move-in process is controlled by the C IN / C OUT 87 of the HD MW82.

This move-in processing is performed by the MS slot 45.
With the MS4 inserted in the
Operate the cancel button 21 to display the menu,
After operating the cursor button 17 and selecting "Edit",
Operate the enter button 20 to display the edit menu,
After moving the cursor button 17 to select "move in", operate the enter button 20, and further operate the cursor button 17 and the select button 18 to move-in the content data recorded in the MS4. After selecting the data, the enter key 20 is operated to display a list of content data to be moved in, and the operation is started when the play / pause button 26 is operated after operating the enter key 20.

[0376] In step S381, the MS MW89
Requests the C IN / C OUT 87 to copy the move-in content data recorded in the MS 4 to the HDD 58 as right invalid data.

In step S382, C IN / C OUT8
7 generates move-in history information indicating that the move-in process is started and records it in the HDD 58. The move-in history information includes information that specifies content data to be moved in. In step S383, MS M
W89 turns off the flag indicating the presence / absence of the right of the content data recorded in MS4, and sets the content data of MS4 as the right invalid data.

In step S384, C IN / C OUT8
7 turns on a flag indicating whether the content data copied to the HDD 58 has a right, and sets the content data in the HDD 58 as right valid data.

In step S385, C IN / C OUT8
7 requests the MS MW 89 to delete the content data recorded in the MS 4. In step S386, the C IN / C OUT 87 deletes the move-in history information created in the process of step S382.

[0380] Steps S381 to S38 described above.
The process of 6 is a move-in process of one content data corresponding to one track, and the processes of steps S381 to S386 are performed on all the selected tracks.

When the move-in process is interrupted due to the power being cut off during the move-in process, the recovering process is executed after the power is restored to compensate for it.

FIG. 83 shows the state transition of the move-in process. State 11 is a state before the move-in process is started. That is, the content data is recorded in the MS 4, and the content data of the MS 4 is in a right-valid state.

State 12 is the state after the process of step S381 is performed. That is, by copying the content data recorded in the MS 4 to the HDD 58, the content data is recorded in both the MS 4 and the HDD 58, and the content data of the MS 4 is right and valid. This shows a state in which the content data of the HDD 58 is invalid.

State 12 is a state after the processing of step S381 is performed. That is, by copying the content data recorded in the MS 4 to the HDD 58, the content data is recorded in both the MS 4 and the HDD 58, and the content data of the MS 4 is right and valid. This shows a state in which the content data of the HDD 58 is invalid.

State 13 is a state after the processing of step S383 is performed. In other words, the content data is recorded in both the MS 4 and the HDD 58, and the content data of the MS 4 and the content data of the HDD 58 are invalid.

State 14 is a state after the processing of step S384 is performed. That is, it shows a state in which content data is recorded in both the MS 4 and the HDD 58, the content data of the MS 4 is invalid, and the content data of the HDD 58 is valid.

State 15 is a state after the processing of step S385 is performed. That is, when the content data of the MS 4 is deleted, the content data is recorded only in the HDD 58.
Shows that the content data is valid.

FIG. 84 shows a display example of the display 15 when selecting content data to be moved in. Of the content data recorded in the MS 4, only the content data that can be moved out are displayed on the display 15.

FIG. 81 shows a display example of the display 15 during the move-in process. In the display area 301 of the display 15, the character “Move in” indicating that the move-in process is being executed is displayed in blinking. A check mark 302 is displayed next to the content data for which the move-in has been completed. Display area 3
In 03, information indicating the progress status of the move-in process (the number of pieces of content data being moved in or completed of move-in / the total number of pieces of content data to be moved-in) is displayed.

The move-in process has been described above, but the process of importing content data from the MS 4 to the HDD 58 is also processed in the same manner. The difference between the move-in process and the import process lies in the handling of the content data recorded in the HDD 58 by the move-in process or the import process.

The audio server 1 can move out and check out the content data recorded in the HDD 58 by the move-in process to another MS 4 or PD 5. However, the audio server 1 can check out the content data recorded in the HDD 58 by the import process to another MS 4 or PD 5, but cannot move it out.

Next, a return process for compensating for interruption of the move-out process or move-in process due to power interruption during the process will be described with reference to FIG. This restoration process is performed after the power is restored and C IN / CO
Started immediately by UT87.

At step S391, C IN / C OUT8
7 determines whether or not there is moveout history information in the HDD 58. If it is determined that the moveout history information exists in the HDD 58, the process proceeds to step S392 in order to compensate for the interruption of the moveout process.

In step S392, C IN / C OUT8
7 executes a move-out restoration process. The move-out restoration process will be described with reference to the flowchart in FIG.

In step S401, C IN / C OUT8
7 determines whether or not the content data of the HDD 58 is invalid. If it is determined that the content data in the HDD 58 is invalid, the process proceeds to step S402.

In step S402, C IN / C OUT8
7 deletes the content data existing in the HDD 58. If it is determined in step S401 that the content data in the HDD 58 is not invalid, step S402 is skipped.

In step S403, C IN / C OUT8
7 deletes the moveout history information of the HDD 58.

The processing returns to FIG. 86. Step S393
In, the C IN / C OUT 87 determines whether the move-in history information exists in the HDD 58. If it is determined that the move-in history information exists in the HDD 58, the process proceeds to step S394 to compensate for the interruption of the move-in process.

In step S394, C IN / C OUT8
7 executes a move-in restoration process. The move-out restoration process will be described with reference to the flowchart in FIG. 88.

In step S421, C IN / C OUT8
7 determines whether or not the content data of the HDD 58 is invalid. If it is determined that the content data of the HDD 58 is invalid, the process proceeds to step S422.

In step S422, C IN / C OUT8
7 deletes the content data existing in the HDD 58. When it is determined in step S421 that the content data in the HDD 58 is not invalid, the step S422 is skipped.

In step S423, C IN / C OUT8
The number 7 deletes the move-in history information of the HDD 58. This is the end of the description of the move-in restoration process. The processing returns to FIG. 86, and the return processing ends.

If it is determined in step S391 in FIG. 86 that the moveout history information does not exist in the HDD 58, the moveout process has been normally completed, so the process in step S392 is skipped. If it is determined in step S393 that the move-in history information does not exist in the HDD 58, the move-in process has been normally completed, so the process of step S394 is skipped.

Further, even if the restoration process is interrupted after the power is cut off, it will be compensated because it is executed again from step S391 after the power is restored. This is the end of the description of the restoration process.

Next, the process of checking out the content data recorded in the HDD 58 of the audio server 1 to the MS 4 will be described with reference to FIGS. 89 to 91.

Here, the process of checking out the content data recorded in the HDD 58 is a process for temporarily making a copy of the content data recorded in the HDD 58 in the MS 4 or the like and using it. The number of possible check-outs of content data is set in advance, and the number of possible check-outs is decreased by 1 by the check-out process, but the number of possible check-outs is decreased by 1 by executing the check-in process described later. Restored.

Check-out processing will be described with reference to the flowchart in FIG. The check-out process is controlled by the C IN / C OUT 87 of the HD MW 82.

In this checkout process, with the MS 4 inserted in the MS slot 45, the user operates the menu / cancel button 21 to display the menu, and operates the cursor button 17 to select "edit". After that, operate the enter button 20 to display the edit menu, and operate the cursor button 17 to "check out".
It is started when the enter button 20 is operated after selecting.

[0409] In step S441, C IN / C OUT8
7 controls the HS DB 91 to acquire the checkout possible count (remaining checkout count) of the content data corresponding to all the tracks belonging to the currently selected album. The number of times content data can be checked out is determined by the AC of the corresponding track object (see FIG. 4).
It is recorded in the CN included in 2) (Fig. 43).

In step S442, C IN / C OUT8
7 requests the related firmware to display on the display 15 the information (song title, checkout allowable number, etc.) regarding the track having the checkout allowable number of 1 or more. FIG. 90 shows a display example of the display 15. Display area 3 of display 15
11 indicates "H" as information indicating the sound source of checkout.
DD "is displayed. The display in the display area 312 indicates the number of times the content data corresponding to each track can be checked out.

At step S443, C IN / C OUT8
7 indicates that the user has a cursor button 17 and a select button 1
By operating 8, it is determined whether or not the track to be checked out is selected from the displayed checkable tracks. If it is determined that the track to be checked out has been selected, the process proceeds to step S444.
Proceed to.

In step S444, C IN / C OUT8
7 adds the selected track to the checkout list. In step S445, C IN / C OUT 87
Decrements the display of the number of times the content data can be checked out to the selected track by one. The process returns to step S441, and the subsequent processes are repeated.

If it is determined in step S443 that the track to be checked out is not selected, the process proceeds to step S446. Step S44
6, C IN / C OUT 87 is set by the user to enter key 2
By operating 0, a list of tracks to be checked out is displayed, and by further operating the enter key 20, it is determined whether or not the execution of checkout is instructed. If it is determined that the checkout execution is not instructed, the process returns to step S441, and the subsequent processes are repeated.

Thereafter, in step S446, if it is determined that the execution of checkout is instructed, the process proceeds to step S447. In step S447, the CIN / C OUT 87 reads the content data corresponding to the track included in the checkout list from the HDD 58 and requests the MS MW 89 to copy the read content data to the MS 4. Note that the copy of the content data includes information that identifies the HDD 58 that is the checkout source.

In step S448, C IN / C OUT8
Reference numeral 7 decrements the number of possible checkouts recorded in the CN of the AC of the track object corresponding to the copied content data by 1, and updates the value of CN. Further, the C IN / C OUT 87 records the information for specifying the MS 4 as the information of the check-out destination in the LCMLOG of the AC.

Although not described, in this check-out process as well, as in the move-out process described above, by using a flag indicating permission / prohibition of reproduction (valid right or invalid right), the power is shut off. Compensation and fraudulent copy creation are suppressed.

FIG. 91 shows a display example of the display 15 during the checkout process.
In the display area 321, the character “Check out” indicating that the checkout is in progress is displayed in blinking. A checkmark 32 appears next to the track that has been checked out.
2 is displayed. A pointer 323 is displayed next to the track currently being checked out. Display area 324
Displays information indicating the progress of the check-out process (the number of content data items being checked out or having been checked out / the total number of content data items included in the check-out list). This is the end of the description of the checkout process.

Next, the process of checking in the content data checked out to the MS 4 into the HDD 58 will be described with reference to FIGS. 92 and 93.

Here, the process of checking out the content data recorded in the MS 4 is to erase the copy of the content data temporarily reproduced from the HDD 58 to the MS 4 and increment the check-out possible count of the HDD 58 by one. Then, the number of possible checkouts is restored to the original value.

Check-in processing will be described with reference to the flowchart in FIG. The check-in process is controlled by the C IN / C OUT 87 of the HD MW 82.

This check-in process is performed in the MS slot 4
5. With MS4 inserted in 5, the user operates the menu / cancel button 21 to display the menu, operates the cursor button 17 to select “Edit”, and then operates the enter button 20 to edit. It is started when the enter button 20 is operated after displaying the menu and operating the cursor button 17 to select "check-in".

In step S451, C IN / C OUT8
7 requests the MS MW 89 to identify the check-in possible content data (the content data checked out from the HDD 58 of the audio server 1) of the data recorded in the MS 4, and request the relevant firmware. Then, the information of the content data that can be checked in is displayed on the display 15.

In step S452, C IN / C OUT8
7 causes the display 15 to display information (track titles, etc.) about the tracks that can be checked in. FIG. 93 shows a display example of the display 15. In the display area 331 of the display 15, "MS" is displayed as information indicating the sound source of check-in. An arrow 332 displayed after the information such as the song title name of the content data indicates that the content data can be checked in.

In step S452, C IN / C OUT8
7 indicates that the user has a cursor button 17 and a select button 1
By operating 8, it is determined whether or not the content data to be checked in is selected from among the displayed checkable content data. If it is determined that the content data to be checked in is selected, the process proceeds to step S453.

In step S453, C IN / C OUT8
7 adds the selected content data to the check-in list. The process returns to step S451, and the subsequent processes are repeated.

When it is determined in step S452 that the content data to be checked in is not selected, the process proceeds to step S454. In step S454, the C IN / C OUT 87 displays a list of content data to be checked in by the user operating the enter key 20, and the enter key 2
By operating 0, it is determined whether or not the execution of check-in is instructed. If it is determined that the execution of check-in is not instructed, the process returns to step S451 and the subsequent processes are repeated.

Thereafter, if it is determined in step S454 that the execution of check-in has been instructed, the process proceeds to step S455. In step S455,
The C IN / C OUT 87 requests the MS MW 89 to erase the content data of the MS 4 included in the check-in list (the flag indicating whether reproduction is possible may be set to no, that is, the right may be invalidated).

In step S456, C IN / C OUT8
The number 7 updates the value of CN by incrementing the number of possible checkouts recorded in the CN of the AC of the track object corresponding to the original content data recorded in the HDD 58 by 1. Also, C IN / C OUT 87 is
The information identifying the MS 4 recorded as the information of the checkout destination is deleted from the LCMLOG of the AC. This is the end of the description of the check-in process.

[0429] Next, a process of checking in the content data recorded in the MS4, and a process of collectively checking out a plurality of tracks belonging to the album including the last track reproduced by the HD play function to the MS4. The exchange processing for continuously executing the above will be described with reference to FIGS. 94 to 97.

This exchange process is started when the user operates the exchange button 22 with the MS 4 inserted in the MS slot 45.

In step S461, C IN / C OUT8
7 requests the MS MW 89 to identify the check-in possible content data among the data recorded in the MS 4. In step S462, C IN / C OUT87
92 cooperates with MS MW89 to check-in the content data that can be checked in by MS4, one content data at a time.
Check-in is performed in the same manner as the check-in processing described above with reference to.

FIG. 95 shows a display example of the display 15 during the process of step S462. In the display area 381 of the display 15, "MS" is displayed as information indicating the sound source of check-in.
In the display area 382, the character "Now Check in" indicating that the check-in is being executed is displayed in blinking. The "x" mark 383 displayed before the information such as the song title name of the content data indicates that the content data cannot be checked in. Check mark 3
Reference numeral 84 indicates that the check-in of the content data has been completed. The pointer 385 indicates that the check-in of the content data is being executed.

[0433] In step S463, C IN / C OUT8
7 determines whether or not all the check-in possible content data of the MS 4 have been checked in. If it is not determined that all the check-in content data of the MS 4 is checked in, the process returns to step S462, and the next content data is checked in. After that, in step S463, if it is determined that all the check-in content data of the MS 4 are checked in, the process proceeds to step S464.

[0434] In step S464, C IN / C OUT8
7 cooperates with the HD DB 91 to determine an album for which the tracks to which it belongs are collectively checked out. Specifically, for example, the HD DB 91 stores the object recording area 122.
The last played track is determined based on the last access date and time (FIG. 42) of each track object recorded in, and the album to which the track belongs is determined as the album to be checked out.

At step S465, C IN / C OUT8
7 selects one track (that is, content data) from the album to be checked out. Step S4
At 66, the C IN / C OUT 87 determines whether the selected content data can be checked out. If it is determined that the selected content data can be checked out, the process proceeds to S467.

[0436] In step S467, C IN / C OUT8
7 requests the MS MW 89 to determine whether or not the MS 4 has enough capacity to check out the selected content data. If it is determined that the MS 4 has enough space to check out the selected content data, the process proceeds to step S468.

In step S468, C IN / C OUT8
7 checks out the selected content data in the same manner as the checkout processing described above with reference to FIG. 89.

FIG. 96 shows a display example of the display 15 during the process of step S468. In the display area 391 of the display 15, "HDD" is displayed as information indicating the sound source for checkout. In the display area 392, the character "Now Check out" indicating that the checkout is being executed is displayed in blinking. The “x” mark displayed before the information such as the song title name of the content data indicates that the content data cannot be checked out, and the check mark indicates that the content data has been checked out. It indicates that

In step S469, C IN / C OUT8
7 is a step S for all tracks (that is, content data) included in the album to be checked out.
In 465, it is determined whether or not the selection is made. If it is determined in step S465 that all content data has not been selected, the process returns to step S465, and the subsequent processes are repeated. In step S469, it is determined that all content data has been selected in step S465. If so, the exchange process is terminated.

If it is determined in step S466 that the selected content data cannot be checked out, steps S467 and S468 are skipped. If it is determined in step S467 that the MS 4 does not have enough capacity to check out the selected content data, step S4
68 is skipped.

FIG. 97 shows a display example of the display 15 immediately after the exchange process is completed. In the display area 401 of the display 15, the character "COMPLETE" indicating that the exchange process is completed is displayed.

As described above, the user only operates the exchange button 22 and the MS 4 to HDD 5
It is possible to automatically execute the check-in processing for 8 and the check-out processing for the MS 4 from the HDD 58. This is the end of the description of the exchange process.

By the way, the above-mentioned move-out processing, move-in processing, import processing, check-out processing,
The check-in process is performed not only between the HDD 58 and the MS 4, but also between the HDD 58 and the PD 5 connected to the connector 43.
It is also possible to execute between and.

FIG. 98 shows a hardware configuration example of the PD 5. LSI (Large Scale Integratio) that realizes PD5
n) 410 has a built-in CPU 411 for controlling the whole. The ROM 411 is connected to the CPU 411 via the bus 421.
2, RAM 413, DMA controller 414, DSP (Digital
Signal Processor) 415, buffer 416, LCD interface (I / F) 417, serial interface (I / F) 418, and interfaces 419 and 42.
0 is connected.

The ROM 412 stores programs for realizing various functions of the PD 5, device IDs, encryption keys and the like. The RAM 413 temporarily stores predetermined data and programs when the CPU 411 executes various processes. DM
The A controller 414 controls data transfer between the buffer 416, the flash memory 426, and the USB controller 424 via the serial interface 418. The DSP 415 decodes the content data recorded in the flash memory 426 or the like. Also,
The DSP 415 has a DES engine and performs encryption / decryption of content data using an encryption key. Buffer 4
16 temporarily buffers data for which the DMA controller 417 controls transfer.

The LCD interface 417 is followed by an LCD
The driver 422 and the LCD 423 are connected. A USB controller 424 and a USB connector 425 are connected to the subsequent stage of the serial interface 418. USB
The controller 424 controls data communication with the audio server 1 connected via the USB connector 425. In the flash memory 426 connected via the interface 419, the content data moved out from the audio server 1 and the additional information such as the song title are recorded. A DAC 427 and an amplifier (AMP) 428 are connected to the subsequent stage of the interface 420. The power supply unit 429 supplies power to the LSI 410.

Audio data obtained by the decoding of the DSP 415 is the interface 420 and the DAC 42.
7 and an amplifier (AMP) 428 to output to headphones or the like.

The move-out processing between the HDD 58 and the MS 4 and the move-out processing between the HDD 58 and the PD 5 are almost the same, so only the differences will be described.

The encryption of the content data recorded in the MS 4 is performed by the same encryption key as the encryption of the content data recorded in the HDD 58 of the audio server 1. Therefore, between the HDD 58 and the MS 4, the encrypted content data can be moved out without being decrypted.

On the other hand, the encryption of the content data recorded in the PD 5 uses an encryption key different from the encryption of the content data recorded in the HDD 58 of the audio server 1. Therefore, as described above with reference to FIG. 56, the encryption of the content data recorded in the HDD 58 is decrypted between the HDD 58 and the PD 5, and the content data is recorded again.
Content that has been encrypted by using a different encryption key for PD5 is moved out.

The above is the description of the move-out process, move-in process, import process, check-out process, and check-in process between the HDD 58 and the PD 5.

Next, the encryption processing and the decryption processing by the encoder / decoder 59 will be described with reference to FIG.

FIG. 99 shows the recording positions of the encrypted content data and object data, and the recording positions of the encryption keys used for encryption and decryption. Below, the content data is Dc and the object data is D
Describe as o. Further, the data (or key) D encrypted with the encryption key K, that is, the encrypted data (or key) D that can be decrypted with the encryption key K is converted into the encrypted data E.
Notated as (K, D).

The content data Dc is encrypted by the encryption key Kc, and the encrypted data E (Kc, Dc) is HD.
Recorded on D58.

The object data Do is encrypted by the encryption key Kc and is converted into encrypted data E (Kc, Do).
It is recorded in the HDD 58.

It is desirable that the encryption key Kc is unique to each content data Dc, that is, a different encryption key Kc is used for each content data Dc.

The encryption key Kc for encrypting each object data Do may be unique or common.

The encryption key Kc used to encrypt the content data Dc or the object data Do is encrypted with the unique key Kstg included in the encryption program and recorded in the HDD 58 as encrypted data E (Kstg, Kc). .

Unique key K used for encryption of encryption key Kc
stg is encrypted by the device key Kdev, and is stored in the sub CPU 64 as encrypted data E (Kdev, Kstg).
Recorded in.

The device key Kdev used to encrypt the unique key Kstg is recorded in the flash ROM 52.

Next, the decoding process by the encoder / decoder 59 will be described with reference to the flowchart in FIG.

[0462] In step S481, the encoder /
The decoder 59 acquires the encrypted data E (Kdev, Kstg) recorded in the sub CPU 64 via the main CPU 51. In step S482, the encoder / decoder 59 uses the device key Kdev recorded in the flash ROM 52 to generate the encrypted data E (Kdev, Kdev).
stg) is decrypted to obtain the unique key Kstg.

At step S483, the encoder /
The decoder 59 uses the unique key Kstg to decrypt the encrypted data E (Kstg, Kc) recorded in the HDD 58, and obtains the encrypted key Kc. In step S484, the encoder / decoder 59 decrypts the encrypted data E (Kc, Dc) using the encryption key Kc to obtain the content data Dc.
To get

Since the same applies to the process of decoding object data, the description thereof will be omitted. This is the end of the description of the decoding process by the encoder / decoder 59.

As described above, in order to decrypt the encrypted content data E (Kc, Dc) and decrypt the content data Dc, the sub CPU 64 and the flash R are used.
A plurality of keys distributed in the OM 52 and the HDD 58 are required.

Particularly, the encrypted data E (Kdev, Kst
The sub CPU 64 for recording g) is not a general-purpose IC but a dedicated IC for configuring the audio server 1, and the encrypted data E (Kde
v, Kstg) can be read.

Therefore, for example, an unauthorized user disassembles the audio server 1 and takes out the sub CPU 64,
Even if a device such as an OM reader is used, it is possible to read the recorded encrypted data E (Kdev, Kstg) information, so the disassembled audio server 1 can be converted to HD.
Even if D58 is taken out and the encrypted content data is read out, the encryption is not easily broken. Therefore, content data is used illegally,
It is possible to prevent tampering.

By the way, although the series of processes described above can be executed by a dedicated device such as the audio server 1, it is necessary to install and execute the firmware shown in FIG. 7 in a general-purpose personal computer or the like. Can also be achieved by.

This firmware is distributed separately from a general-purpose computer to distribute the program to the user. The firmware stores a magnetic disk (including a floppy disk), an optical disk (CD-ROM (Com
pact Disc-Read Only Memory), DVD (Digital Versatile
(Including Disc)), a magneto-optical disc (including MD (Mini Disc)), or a package medium including a semiconductor memory and the like, and firmware provided to the user in a state where the computer is pre-installed. It consists of a ROM and a hard disk in which is recorded.

In this specification, the steps for writing a program (firmware) are not limited to the processing performed in time series according to the order described, but are not necessarily performed in time series, and may be performed in parallel or individually. It also includes the processing to be performed.

[0471]

As described above, according to the first encryption device and method, the third encryption device, and the first program of the present invention, the first encrypted data generated and the second encrypted data are generated.
The first encryption key encrypted by the encryption key is recorded on the information recording medium. Further, since the second encryption key encrypted by the third encryption key is held and the third encryption key is held, the encryption key for decrypting the encrypted data can be easily used by an unauthorized user. It is possible to record so that it will not be acquired.

According to the second encryption device and method and the program of the present invention, the generated first encrypted data,
And the first encryption key encrypted by the second encryption key is recorded in the hard disk drive. Further, the second encryption key encrypted by the third encryption key is held in the dedicated IC, and the third encryption key is held in the flash memory. Therefore, the encryption key for decrypting the encrypted data is It is possible to record so that it cannot be easily acquired by an unauthorized user.

First Decoding Apparatus and Method of the Present Invention, Third
According to the decryption device of 3rd Embodiment, and the third program, the encrypted second encryption key is acquired, and the encrypted second encryption key is decrypted using the retained third encryption key, The first encryption key encrypted with the encrypted second encryption key is decrypted, and the decrypted first encryption key is used to decrypt the encrypted data to restore the content data. It is possible to decrypt the encrypted data by using the recorded encryption key so that it will not be easily acquired by another user.

According to the second decryption apparatus and method and the fourth program of the present invention, the encrypted second encryption key stored in the dedicated IC is acquired and stored in the flash memory. The obtained encrypted second encryption key is decrypted using the encryption key of No. 3, and the decrypted second encryption key is used, and the encrypted first encryption stored in the hard disk drive. Since the key is decrypted and the decrypted first encryption key is used to decrypt the encrypted data stored by the hard disk drive to restore the content data, it is recorded so that it cannot be easily obtained by an unauthorized user. The encrypted data can be decrypted using the encrypted key.

[Brief description of drawings]

FIG. 1 is a diagram for explaining an outline of an audio server 1 according to an embodiment of the present invention.

FIG. 2 is an external view of the audio server 1.

FIG. 3 is a top view of the audio server 1.

FIG. 4 is a rear view of the audio server 1.

5 is a front view of the audio server 1. FIG.

FIG. 6 is a block diagram illustrating a hardware configuration example of the audio server 1.

FIG. 7 is a diagram showing firmware executed by the audio server 1.

FIG. 8 is a diagram for explaining a FAT type file system (data format) applied to the HDD 58.

9 is a diagram showing a logical structure of a file recording area 121. FIG.

FIG. 10 is a diagram showing a configuration of a FAT 141.

FIG. 11 is a diagram showing an example of a FAT 141.

FIG. 12 is a diagram showing an example of recording in a file recording area 121.

FIG. 13 is a diagram showing a configuration of a size recording area 151.

FIG. 14 is a flowchart illustrating a file creation process.

FIG. 15 is a flowchart illustrating a free cluster acquisition process.

FIG. 16 is a flowchart illustrating a FAT entry reading process.

FIG. 17 is a flowchart illustrating a connection process.

FIG. 18 is a flowchart illustrating a reading process of a file X.

FIG. 19 is a flowchart illustrating a search process for a file X.

FIG. 20 is a flowchart illustrating reverse reading processing of file X.

FIG. 21 is a diagram showing a logical structure of an object recording area 122.

22 is a diagram showing the structure of an object type recording area 163. FIG.

FIG. 23 is a diagram for explaining an area information recording area 164.

FIG. 24 is a diagram showing a configuration of an object management unit 124.

FIG. 25 is a diagram showing the structure of session management information 181.

FIG. 26 is a diagram showing two types of basic object types.

FIG. 27 is a diagram showing the structure of an object identifier.

FIG. 28 is a flowchart illustrating an object creation process.

FIG. 29 is a flowchart illustrating a session opening process.

FIG. 30 is a flowchart illustrating a free entry securing process.

FIG. 31 is a flowchart illustrating a write session confirmation process.

FIG. 32 is a flowchart illustrating session discard processing.

FIG. 33 is a flowchart illustrating an object search process.

FIG. 34 is a flowchart illustrating an entry acquisition process.

FIG. 35 is a flowchart illustrating an object update process.

FIG. 36 is a flowchart illustrating a stream object creation process.

FIG. 37 is a flowchart illustrating a stream object search process.

FIG. 38 is a diagram showing a directory structure of an object.

FIG. 39 is a diagram showing a format of a folder list object.

FIG. 40 is a diagram showing a format of a folder object.

FIG. 41 is a diagram showing a format of an album object.

FIG. 42 is a diagram showing a format of a track object.

[Fig. 43] Fig. 43 is a diagram illustrating details of an AC of a track object.

FIG. 44 is a diagram showing a format of content data.

FIG. 45 is a diagram showing a format of a CC object.

FIG. 46 is a diagram showing a format of CC data.

FIG. 47 is a diagram showing a data flow when CD ripping is executed.

FIG. 48 is a diagram showing a data flow when CD recording is executed.

[Fig. 49] Fig. 49 is a diagram illustrating a data flow when HD recording is performed on a digital input.

[Fig. 50] Fig. 50 is a diagram illustrating a data flow when HD recording is performed on an analog input.

[Fig. 51] Fig. 51 is a diagram illustrating a data flow when HD play is executed.

FIG. 52 is a diagram showing a data flow when CD play is executed.

FIG. 53 is a diagram showing a data flow when MS play is executed.

FIG. 54 is a diagram showing a data flow when MS checkout / moveout is executed.

FIG. 55 is a diagram showing a data flow when MS import / move-in is executed.

FIG. 56 is a diagram showing a data flow when PD checkout is executed.

FIG. 57 is a diagram for explaining CD ripping.

FIG. 58 is a diagram for explaining CD recording.

FIG. 59 is a diagram for explaining division of the buffer 56 in CD ripping or CD recording.

FIG. 60 is a diagram showing state transition of each buffer.

FIG. 61 is a ring buffer 241 provided in the HDD 58.
FIG.

FIG. 62 is a diagram for explaining the flow of data between the buffers during CD ripping.

FIG. 63 is a flowchart illustrating a recording speed setting process.

FIG. 64 is a flowchart illustrating a CD recording process.

FIG. 65 is a flowchart illustrating a ring buffer information initialization process.

FIG. 66 is a flowchart illustrating a recording process for one song.

FIG. 67 is a flowchart illustrating monitor sound output processing.

[Fig. 68] Fig. 68 is a flowchart illustrating a write process to a ring buffer.

[Fig. 69] Fig. 69 is a flowchart illustrating a read process for a ring buffer.

FIG. 70 is a diagram showing a display example of the display 15 during CD ripping.

71 is a diagram for explaining setting of a reproduction area. FIG.

FIG. 72 is a diagram showing an example of a playlist.

FIG. 73 is a diagram showing an example of a playlist.

FIG. 74 is a diagram showing an example of a playlist.

FIG. 75 is a diagram showing an example of a playlist.

FIG. 76 is a flowchart illustrating a playlist creation process.

[Fig. 77] Fig. 77 is a flowchart illustrating a reproduction process of an all-track repeat.

FIG. 78 is a flowchart illustrating moveout processing.

[Fig. 79] Fig. 79 is a diagram illustrating a state transition of the moveout process.

FIG. 80 is a display 15 in a moveout process.
It is a figure which shows the example of a display of.

FIG. 81 is a display 15 in a moveout process.
It is a figure which shows the example of a display of.

FIG. 82 is a flowchart illustrating move-in processing.

[Fig. 83] Fig. 83 is a diagram illustrating a state transition of a move-in process.

[Fig. 84] Fig. 84 is a diagram showing a display example of the display 15 in the move-in process.

FIG. 85 is a diagram showing a display example of the display 15 in the move-in process.

FIG. 86 is a flowchart illustrating a return process.

FIG. 87 is a flowchart illustrating moveout restoration processing.

FIG. 88 is a flowchart illustrating a move-in restoration process.

FIG. 89 is a flowchart illustrating checkout processing.

FIG. 90: Display 1 in checkout processing
It is a figure which shows the example of a display of 5.

FIG. 91: Display 1 in Checkout Processing
It is a figure which shows the example of a display of 5.

FIG. 92 is a flowchart illustrating check-in processing.

FIG. 93 is a display 15 in the check-in process.
It is a figure which shows the example of a display of.

FIG. 94 is a flowchart illustrating exchange processing.

FIG. 95: Display 1 in exchange processing
It is a figure which shows the example of a display of 5.

FIG. 96: Display 1 in exchange processing
It is a figure which shows the example of a display of 5.

FIG. 97: Display 1 in exchange processing
It is a figure which shows the example of a display of 5.

[Fig. 98] Fig. 98 is a block diagram illustrating a hardware configuration example of the PD 5.

FIG. 99 is a diagram showing recording positions of encrypted content data and object data, and recording positions of encryption keys used for encryption and decryption.

[Fig. 100] Fig. 100 is a flowchart illustrating a decoding process by the encoder / decoder 59.

[Explanation of symbols]

1 audio server, 2 speakers, 3 music C
D, 4 MS, 5 PD, 6 PC, 22 exchange buttons, 51 main CPU, 52 flash ROM, 58 HDD, 64 sub CPU, 71RTOS
, 72APP, 73 UMW, 74 LMW, 75
DD, 76 Main APP, 77HD APP, 78 CD
APP, 79 MS APP, 80 PD APP, 81 FEP,
82 HD MW, 83 HD CC, 84 CD RIPPING,
85 HD PLAY, 86 HD REC, 87 C IN / C OU
T, 88 CD MW, 89 MS MW, 90 PDMW

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kei Inoue             6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Soni             -Inside the corporation F-term (reference) 5D044 AB05 BC01 CC04 CC10 DE50                       DE57 DE58 GK17                 5J104 AA16 EA02 EA07 JA03 NA02

Claims (36)

[Claims] 1. An encryption device for encrypting content data, comprising: an encryption means for encrypting the content data using a first encryption key to generate first encrypted data; and an encryption means for generating the encrypted data. First recording means for recording the encrypted first encrypted data on an information recording medium, and second recording for recording the first encryption key encrypted by a second encryption key on the information recording medium Means, a first holding means for holding the second encryption key encrypted by a third encryption key, and a second holding means for holding the third encryption key. Encryption device. 2. The encryption device according to claim 1, wherein the information recording medium is a hard disk drive. 3. The first holding means is a dedicated IC for outputting the first encryption key encrypted by the second encryption key only through a predetermined interface. The encryption device according to Item 1. 4. The encryption device according to claim 1, wherein the second holding unit is a flash memory. 5. The encrypting means also encrypts object data relating to right information of the content data to generate second encrypted data, and the first recording means generates the second encrypted data. The encryption device according to claim 1, wherein the second encryption data is also recorded in the information recording medium. 6. An encryption method of an encryption device for encrypting content data, comprising: an encryption step of encrypting the content data with a first encryption key to generate first encrypted data; A first recording step of recording the first encrypted data generated by the process of the encryption step on an information recording medium; and the first encryption key encrypted by a second encryption key on the information recording medium. A second recording step of recording, a first holding step of holding the second encryption key encrypted by a third encryption key, and a second holding step of holding the third encryption key An encryption method comprising: 7. A program for encrypting content data, comprising: an encryption step of encrypting the content data by using a first encryption key to generate first encrypted data; and the encryption step. A first recording step of recording the first encrypted data generated in the processing of 1. on an information recording medium; and recording the first encryption key encrypted by a second encryption key on the information recording medium. A second recording step; a first holding step of holding the second encryption key encrypted by a third encryption key; and a second holding step of holding the third encryption key. A recording medium having a computer-readable program recorded thereon. 8. An encryption step of encrypting the content data by using a first encryption key in a computer for encrypting the content data to generate first encrypted data, and a process of the encryption step. A first recording step of recording the encrypted first encrypted data on an information recording medium, and a second recording of recording the first encryption key encrypted by a second encryption key on the information recording medium A program for executing a step, a first holding step of holding the second encryption key encrypted by a third encryption key, and a second holding step of holding the third encryption key. 9. An encryption device for encrypting content data, comprising: an encryption means for encrypting the content data with a first encryption key to generate first encrypted data; and an encryption means for generating the encrypted data. First recording means for recording the encrypted first encrypted data in a hard disk drive, and second recording means for recording the first encryption key encrypted by a second encryption key in the hard disk drive An encryption device comprising: a dedicated IC that holds the second encryption key encrypted by the third encryption key; and a flash memory that holds the third encryption key. 10. The encrypting unit also encrypts object data relating to right information of the content data to generate second encrypted data, and the first recording unit generates the second encrypted data. The encryption device according to claim 9, wherein second encryption data is also recorded in the hard disk drive. 11. An encryption method of an encryption device for encrypting content data, comprising: an encryption step of encrypting the content data with a first encryption key to generate first encrypted data; A first recording step of recording the first encrypted data generated in the process of the encryption step in a hard disk drive, and recording the first encryption key encrypted by a second encryption key in the hard disk drive A second recording step; a first holding step of holding the second encryption key encrypted by the third encryption key in a dedicated IC; and a second holding step of holding the third encryption key in a flash memory. And a holding step of the encryption method. 12. A program for encrypting content data, comprising: an encryption step of encrypting the content data with a first encryption key to generate first encrypted data; and the encryption step. A first recording step of recording the first encrypted data generated in the processing of 1) in a hard disk drive; and a second recording step of recording the first encryption key encrypted by a second encryption key in the hard disk drive. Recording step, a first holding step of holding the second encryption key encrypted by the third encryption key in a dedicated IC, and a second holding step of holding the third encryption key in a flash memory. A recording medium having a computer-readable program recorded thereon, comprising: 13. A computer for encrypting content data, wherein the computer uses a first encryption key to encrypt the content data to generate first encrypted data, and a process of the encryption step. A first recording step of recording the encrypted first encrypted data in a hard disk drive, and a second recording step of recording the first encryption key encrypted by a second encryption key in the hard disk drive A first holding step of holding the second encryption key encrypted by the third encryption key in the dedicated IC, and a second holding step of holding the third encryption key in the flash memory Program to let. 14. A dedicated encryption device for encrypting content data, and an encryption means for encrypting the content data using a first encryption key to generate first encrypted data, First recording means for recording the first encrypted data generated by the encryption means on an information recording medium, and recording the first encryption key encrypted by a second encryption key on the information recording medium A second recording means, a first holding means for holding the second encryption key encrypted by a third encryption key, and a second holding means for holding the third encryption key. An encryption device comprising. 15. The encryption device according to claim 14, wherein the information recording medium is a hard disk drive. 16. The first holding means is a dedicated IC for outputting the first encryption key encrypted by the second encryption key only through a predetermined interface. Item 15. The encryption device according to Item 14. 17. The encryption device according to claim 14, wherein the second holding unit is a flash memory. 18. The encryption means also encrypts object data relating to right information of the content data to generate second encrypted data, and the first recording means,
The second encrypted data generated by the encryption means is also recorded on the information recording medium.
4. The encryption device according to 4. 19. Storage means for storing a first encryption key for decrypting the encrypted data and a second encryption key, and a third encryption key for storing the first encryption key for decrypting the encryption data. And a second holding unit that holds the third encryption key and a second holding unit that holds the third encryption key. An acquisition unit that acquires the encrypted second encryption key held by the first holding unit; and the acquisition unit that uses the third encryption key held by the second holding unit A first decryption means for decrypting the encrypted second encryption key acquired by the means, and a second decryption key decrypted by the first decryption means for storing by the storage means Cipher Using the second decryption means for decrypting the encrypted first encryption key and the first encryption key decrypted by the second decryption means, the encrypted data stored by the storage means is stored. A decryption device, comprising: a decryption unit that decrypts and restores the content data. 20. The decoding device according to claim 19, wherein the storage unit is a hard disk drive. 21. The first holding means is a dedicated IC for outputting the first encryption key encrypted by the second encryption key only through a predetermined interface. Item 20. The decoding device according to Item 19. 22. The decoding device according to claim 19, wherein the second holding unit is a flash memory. 23. The decryption device according to claim 19, wherein the restoration unit also decrypts the encrypted data to restore object data relating to right information of the content data. 24. Storage means for storing a first encryption key for encrypting the encrypted data and a second encryption key, the encrypted encryption data being decrypted by the third encryption key. And a second holding unit that holds the third encryption key, and a first holding unit that holds the second encryption key, and a decryption device that decrypts the encrypted data to restore the content data. In the decryption method, an acquisition step of acquiring the encrypted second encryption key held by the first holding means, and the third encryption key held by the second holding means are used. A first decryption step of decrypting the encrypted second encryption key obtained in the process of the obtaining step, and a second decryption key decrypted in the process of the first decryption step. Use the memory A second decryption step of decrypting the encrypted first encryption key stored by means, and the storage means using the first encryption key decrypted in the process of the second decryption step. Decrypting the encrypted data stored by, and restoring the content data. 25. Storage means for storing a first encryption key for decrypting the encrypted data and a second encryption key, and a third encryption key for encrypting the encrypted data. And a second holding unit that holds the third encryption key, and a first holding unit that holds the second encryption key, and a decryption device that decrypts the encrypted data and restores the content data. A program for controlling, the obtaining step of obtaining the encrypted second encryption key held by the first holding unit, and the third holding unit held by the second holding unit. A first decryption step of decrypting the encrypted second encryption key obtained in the process of the obtaining step by using the encryption key of 2 encryption key Using a second decryption step of decrypting the encrypted first encryption key stored by the storage means, and the first encryption key decrypted in the process of the second decryption step. And a decryption step of decrypting the encrypted data stored by the storage means and restoring the content data, the recording medium having a computer-readable program recorded thereon. 26. Storage means for storing a first encryption key for decrypting the encrypted data and a second encryption key, and a third encryption key for storing the first encryption key for decrypting the encryption data. A first holding means for holding the second encryption key, and a second holding means for holding the third encryption key, and a computer for decrypting the encrypted data to restore content data, An obtaining step of obtaining the encrypted second encryption key held by the first holding means, and an obtaining step of using the third encryption key held by the second holding means A first decryption step of decrypting the encrypted second encryption key obtained in the process of 1., and the second encryption key decrypted in the process of the first decryption step, By means A second decryption step of decrypting the stored encrypted first encryption key; and the first encryption key decrypted in the process of the second decryption step, and stored by the storage means. And a restoring step of decrypting the encrypted data that has been decrypted and restoring the content data. 27. A hard disk drive which is encrypted by encrypted data and a second encrypted key, and which stores a first encrypted key for decrypting the encrypted data, and an encrypted by a third encrypted key. In a decryption device that includes a dedicated IC that holds the second encryption key and a flash memory that holds the third encryption key, the decryption device that decrypts the encrypted data to restore content data Using the acquisition means for acquiring the encrypted second encryption key, and the third encryption key acquired by the acquisition means using the third encryption key held by the flash memory. A second decryption means for decrypting the second encryption key and the second encryption key decrypted by the first decryption means Second decoding the first cipher key encrypted stored I
And decrypting means for decrypting the encrypted data stored in the hard disk drive by using the first encryption key decrypted by the second decrypting means, and restoring the content data. A decoding device characterized by. 28. The decryption apparatus according to claim 27, wherein the restoration unit decrypts the encrypted data and also restores object data relating to right information of the content data. 29. A hard disk drive, which stores the first encryption key for decrypting the encrypted data and the second encryption key, and the third encryption key. A decryption method for a decryption device, comprising: a dedicated IC that holds the second encryption key; and a flash memory that holds the third encryption key; An acquisition step of acquiring the encrypted second encryption key held by the IC, and an encryption acquired by the processing of the acquisition step using the third encryption key held by the flash memory A first decryption step of decrypting the second encryption key that has been decrypted, and the second encryption key decrypted in the processing of the first decryption step, A second decryption step of decrypting the encrypted first encryption key stored by a hard disk drive; and the hard disk using the first encryption key decrypted in the process of the second decryption step A decryption method of decrypting the encrypted data stored by a drive to restore the content data. 30. A hard disk drive, which stores the first encryption key for decrypting the encrypted data and the second encryption key, and the third encryption key. A program for controlling a decryption device that includes a dedicated IC that holds the second encryption key and a flash memory that holds the third encryption key, and that decrypts the encrypted data to restore the content data. In the processing of the acquisition step, the acquisition step of acquiring the encrypted second encryption key held by the dedicated IC, and the third encryption key held by the flash memory are used. A first decryption step of decrypting the acquired encrypted second encryption key; and the second decryption step decrypted by the process of the first decryption step. A second decryption step of decrypting the encrypted first encryption key stored by the hard disk drive using a No. key, and the first encryption decrypted by the processing of the second decryption step. And a decryption step of decrypting the encrypted data stored by the hard disk drive by using a key to restore the content data, the recording medium having a computer-readable program recorded thereon. 31. A hard disk drive storing a first encryption key for decrypting the encrypted data and a second encryption key, and a third encryption key for encrypting the first encryption key for decrypting the encryption data. A dedicated IC that holds the second encryption key and a flash memory that holds the third encryption key, and a computer that decrypts the encrypted data to restore the content data. An acquisition step of acquiring the encrypted second encryption key, and the encrypted encryption acquired in the processing of the acquisition step using the third encryption key held by the flash memory. A first decryption step of decrypting a second encryption key; and the hard disk using the second encryption key decrypted in the process of the first decryption step. A second decryption step for decrypting the encrypted first encryption key stored by a disk drive; and the hard disk using the first encryption key decrypted in the process of the second decryption step. A program for executing a restoration step of decrypting the encrypted data stored by a drive and restoring the content data. 32. Storage means for storing a first encryption key for decrypting the encrypted data and a second encryption key, and a third encryption key for storing the first encryption key for decrypting the encryption data. And a second holding unit for holding the third encryption key, and a second holding unit for holding the third encryption key, which is dedicated for decrypting the encrypted data and restoring the content data. In the decrypting device, the acquisition unit for acquiring the encrypted second encryption key held by the first holding unit, and the third encryption key held by the second holding unit Using a first decryption unit for decrypting the encrypted second encryption key acquired by the acquisition unit, and the second encryption key decrypted by the first decryption unit, Described by storage means A second decryption unit that decrypts the stored encrypted first encryption key, and the first encryption key that is decrypted by the second decryption unit, are stored by the storage unit. A decryption device comprising: a restoration unit that decrypts the encrypted data and restores the content data. 33. The decoding device according to claim 32, wherein said storage means is a hard disk drive. 34. The first holding means is a dedicated IC for outputting the first encryption key encrypted by the second encryption key only through a predetermined interface. Item 32. The decoding device according to Item 32. 35. The decoding device according to claim 32, wherein the second holding unit is a flash memory. 36. The restoring means decrypts the encrypted data and restores object data relating to right information of the content data.
The decoding device according to.