JP2000156035A - Digital signal recording system, digital signal recording method and program recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a digital signal having the copyright from being illegally copied to plural recording media. SOLUTION: The certifying process is carried out by an I/O client 11 as to whether the unique ID of a ROM 43 in a PC interface board 20 coincides with the self provided unique ID. when the certification of coincidence is not allowed by the I/O client 11 due to that these unique IDs are noncoincident, the down load is interrupted. When the unique IDs coincide and the coincidence is certified by the I/O client 11, the musical soft of an HDD(hard disk drive) 13 is transmitted to a card-shaped recording medium 30 through a PC bus 17 and the PC interface board 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a digital signal recording system, a digital signal recording method, and a program recording medium for preventing illegal copying of digital signals.

[0002]

2. Description of the Related Art A recording / reproducing system for recording audio data and video data in a solid-state memory such as a flash memory instead of an optical disk or a magnetic disk and reading and reproducing the data has been proposed. In such a recording / reproducing system, by using a solid-state memory as a recording medium, the system can be downsized and the influence of vibration can be reduced.

[0003]

The recording / reproducing system has a recording medium which is replaceable, reproduces digital signals such as audio data recorded on a plurality of recording media, and reproduces a plurality of recording media. It is possible to record digital signals on a medium.

However, digital signals such as audio data and video data are easily copied without deterioration. Therefore, if the digital signal is copyrighted, storing the digital signal in the host computer of the recording / reproducing system and recording the digital signal one after another on a plurality of recording media will result in an infinite number of illegal copies being recorded. It will be recorded on the medium.

The present invention has been proposed in view of the above circumstances, and a digital signal recording system and a digital signal recording system capable of preventing a copyrighted digital signal from being copied to a plurality of recording media. It is an object to provide a method and a program recording medium.

[0006]

In order to solve the above-mentioned problems, a digital signal recording system according to the present invention comprises: a recording medium for recording a digital signal; a first storage means for storing a unique ID; An adapter device having flag addition means for adding a copyright flag to a signal; second storage means for storing a digital signal; third storage means for storing a unique ID; A first reading unit that reads out the first ID, a first authentication unit that authenticates that the unique ID stored in the third storage unit matches the unique ID stored in the first storage unit, When the authentication means has authenticated, the digital signal read by the first reading means is transmitted to the adapter device, and when the first authentication means cannot be authenticated, the first signal is transmitted. Storage means having a first transmission means for stopping transmission of the digital signal read by the output means, wherein the flag adding means of the adapter device has a copyright protection function for the digital signal transmitted from the first transmission means. A flag is added, and the recording medium records the digital signal to which the copyright flag is added by the flag adding means.

A digital signal recording system according to the present invention is a digital signal recording method for recording a digital signal stored in a storage device on a recording medium via an adapter device. It authenticates that the ID and the ID match. If the unique ID cannot be authenticated, transmission of the digital signal stored in the storage device is stopped. If the unique ID can be authenticated, the digital signal is stored in the storage device. A copyright flag is added to an existing digital signal and transmitted to the adapter device, and the transmitted digital signal is recorded on a recording medium via the adapter device.

A program recording medium according to the present invention is a program recording medium in which a control program for recording a digital signal stored in a storage device on the recording medium via an adapter device is recorded.
It authenticates that D and the unique ID of the adapter device match. If the unique ID cannot be authenticated, transmission of the digital signal stored in the storage device is stopped, and if the unique ID can be authenticated. A control program for adding a copyright flag to the digital signal stored in the storage device, transmitting the digital signal to the adapter device, and recording the transmitted digital signal on a recording medium via the adapter device is recorded. I do.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The present invention is applied to, for example, a recording / reproducing system 1 having the configuration shown in FIG. The recording / reproducing system 1 includes a host computer 10 that controls reading and writing of audio data, and a card-type recording medium 30 connected to the host computer 10 via a PC interface adapter 20. The recorded audio data can be recorded on the card-type recording medium 30, and the audio data recorded on the card-type recording medium 30 is reproduced.

The host computer 10 corresponds to a so-called personal computer, and is an I / O client 11 which is a device driver for transmitting and receiving control signals and the like to and from the PC interface adapter 20.
And an audio player 12 as the application software of the I / O client 11 and a hard disk drive (hereinafter referred to as “HDD”) 13 for storing data from the I / O client 11.

The I / O client 11 transmits a control signal indicating the operating state (status) of the host computer 10 and a serial clock SCLK for synchronization to the PC interface adapter 20 via the PC bus 17, and outputs audio data. Or busy signal BSY etc.
O data is received via the PC interface adapter 20. Also, the I / O client 11
It has a unique ID for authentication for identifying the host computer 10.

The audio player 12 is application software for reproducing audio data from the card type recording medium 30 and audio data stored in the HDD 13.

The HDD 13 stores, for example, audio data read out from the card type recording medium 30 via the PC interface adapter 20 or audio data transmitted via a network (not shown).

The PC interface adapter 20 is an interface between the host computer 10 and the card type recording medium 30, and here, the card type recording medium 30
Shall be provided inside the.

The PC interface adapter 20
Uses a PCMCIA card (conforming to the JEIDA / PCMCIA standard) adapter, and stores a PC interface control unit 21, a serial protocol control unit 22, and audio data in one page (512 bytes).
And a memory 23 for storing each of them.

The PC interface control unit 21 stores a redundant area register 41 to which a copyright flag, which is data of a redundant area (hereinafter referred to as "redundant area data") in the flash memory 32 to be described later, and audio data and the like. I to send or receive a given command
/ O register 42 and identification data used for authentication (hereinafter, referred to as
It is called “unique ID”. ) Is stored.

The redundant area register 41 detects whether or not the redundant area data is written therein as shown in FIG. 2 and a copyright flag in the redundant area data is set. Then, the redundant area register 41 performs an authentication process.
The redundant area data is transmitted to the I / O client 11 via the PC bus 17.

As shown in FIG. 3, the I / O register 42 has a lower data register (Lower Data Register).
And Upper Data Register
And the control register (Control Data Register)
, A command register, and a status register. I / O
The register 42 analyzes a command transmitted from the I / O client 11 and a status BS described later using these registers, and performs a process according to the analysis result. For example, when the I / O register 42 receives from the host computer 10 the file address of the card-type recording medium 30 to be read, the card-type recording medium 3
Then, a transfer command to transfer the file from 0 to the host computer 10 is transmitted to the card type recording medium 30. The I / O register 42 stores audio data from the memory 23, a ready signal RDY, and a busy signal BSY.
To the I / O client 11 via the PC bus 17 at a predetermined timing.

The ROM 43 stores a unique ID. The unique ID is used to identify the PC interface board 20. That is, the unique ID is different for each PC interface board 20.

Further, the serial protocol control unit 22
Based on a serial protocol control signal from the PC interface control unit 21, audio data and data in a redundant area are read from the card-type recording medium 30, the audio data is stored in the memory 23, and the copyright flag of the redundant area data is stored in the PC. It is supplied to the interface control unit 21.

The card type recording medium 30 includes a memory controller 31 for controlling reading / writing of audio data and the like, and a flash memory 32 for recording audio data and the like.

The memory controller 31 writes audio data to the flash memory 32 in page units,
Deletes audio data written in block units.

The flash memory 32 has, for example, 1024
Consists of blocks. One block is composed of 16 pages, and one page is composed of 528 bytes. In one page, audio data is recorded in a 512-byte normal area, and redundant area data such as a copyright flag is recorded in a 16-byte redundant area. Therefore, the storage capacity of the flash memory 32 is about 8 Mbytes (≒ 528 × 16 × 1024 [bytes]).

In the recording / reproducing system 1 having such a configuration, the host computer 1
Reading of audio data to 0 is performed according to the time chart shown in FIG.

As shown in FIG. 4A, the I / O client 11 of the recording / reproducing system 1 inverts and outputs a control signal indicating an operation state (status) at a predetermined timing to change the status. Each time the control signal BS is inverted, the operation state changes to the status BS0, BS1, BS2,
The status changes to BS3, and then the status changes to BS0 again.
That is, the four statuses are repeatedly changing.
When the status is BS1, the host computer 10 performs a predetermined operation. When the status is BS0, BS2, or BS3, the PC interface adapter 20 or the card-type recording medium 30 performs a predetermined operation.

When the status is BS0, both the I / O client 11 and the I / O register 42 are idling and do not output any data. I / O client 11
TPC (transfer protocol) to read data
l command) When signal transmission starts, status BS
Becomes 1.

In the status BS 1, the I / O client 11 transmits the I / O register 42 via the PC bus 17.
4B, a TPC signal is transmitted as shown in FIG. 4B, and a serial clock SCLK is transmitted as shown in FIG. 4C. When the transmission of the TPC signal ends, the status becomes BS2.

In the status BS2, the I / O register 4
2 transmits to the I / O client 11 a busy signal BSY indicating that audio data is being read from the flash memory 32.

At this time, the serial protocol control unit 22
Reads audio data and redundant area data from the flash memory 32 via the memory controller 31. The serial protocol control unit 22 supplies the audio data to the I / O register 42 via the memory 23, and transmits the redundant area data to the redundant area register 41.
To supply.

When the reading from the card type recording medium 30 is completed, the I / O register 42 transmits a ready signal RDY indicating that the reading has been completed to the host computer 10. When the transmission of the ready signal RDY is completed, the status becomes BS3.

In the status BS3, the I / O register 4
Reference numeral 2 designates the I / O client 11 from the flash memory 32 to the serial protocol control unit 22 and the memory 3
3 to transmit the read audio data.

At this time, the I / O register 42 is stored in the ROM
The unique ID read from the memory 43 and the audio data from the memory 23 are transmitted to the I / O via the PC bus 17.
Send to client 11. The redundant area register 41 detects whether the redundant area data has a copyright flag, and transmits the redundant area data to the I / O client 11 via the PC bus 17.

The I / O client 11 of the host computer 10 determines whether or not the audio data has a copyright based on the redundant area data. Do.

When the I / O client 11 determines that there is a copyright, the I / O client 11 performs audio data authentication processing. Specifically, the I / O client 11 performs an authentication process to confirm that the unique ID of the I / O client 11 matches the unique ID from the I / O register 42. If the I / O client 11 cannot be authenticated because the unique IDs do not match, the I / O client 11 does not write the audio data to the HDD 13 and stops reading the audio data. If the unique ID matches and the authentication is successful, the I / O client 11 inserts the authenticated unique ID into the file header of the audio data transmitted from the I / O register 42, and writes the audio data. A process for writing to the HDD 13 is performed.

Then, the PC interface board 20
When the transmission of the CRC signal to the host computer 10 is completed, the status returns to the status BS0.

As described above, the I / O client 11
Is designed to write the audio data from the PC interface board 20 to the HDD 13 only when the unique IDs of the host computer 10 and the PC interface board 20 match and can be authenticated.

As a result, the host computer 10
Audio data cannot be read from the card type recording medium 30 unless it is connected to only one corresponding PC interface board 20.

The control program may be installed in the host computer 10 from a program recording medium on which the control program is recorded in order to perform the operation of the I / O client 11 and the like described above. As such a program recording medium, audio data is read from the card-type recording medium 30, authentication is performed so that the unique ID of the PC interface board 20 matches the unique ID of the host computer 10, and the unique ID is read.
Is authenticated, the audio data read from the card-type recording medium 30 is written into the host computer 10 via the PC interface board 20. If the unique ID cannot be authenticated, the audio data is read from the card-type recording medium 30. It is preferable that a control program for stopping writing of the read audio data to the host computer 10 be recorded.

Next, a case where audio data is reproduced by the audio player 12 will be described. I
When playing back the audio data stored in the HDD 13, the / O client 11 reads the unique ID in the file header of the audio data, and
Further, the unique ID of the PC interface board 20 is read from the ROM 43 via the I / O register 42. The I / O client 11 authenticates that these two unique IDs match, and supplies the audio data to the audio player 12 in the application layer when the authentication is successful. Thus, the audio data is reproduced. On the other hand, if the authentication fails because the unique IDs do not match, the audio data is not supplied to the audio player 12. That is, if the unique ID cannot be authenticated, the audio data cannot be reproduced.

Although the I / O client 11 has been authenticated using the unique ID in the file header of the audio data, the I / O client 11 may be authenticated using its own unique ID.

In order to perform the operations of the I / O client 11, the audio player 12, and the like, the control program may be installed in the host computer 10 from a program recording medium on which the control program is recorded. As such a program recording medium,
The audio data stored in the host computer 10 is read, and the unique ID of the file header of the read audio data and the unique ID of the PC interface board 20 are authenticated. It is preferable that a control program is recorded in which the read audio data is reproduced when the reproduction is completed, and the reproduction of the read audio data is stopped when the unique ID cannot be authenticated.

Next, a case where audio data is written from the host computer 10 to the card type recording medium 30 will be described. At this time, the host computer 10 and the PC interface board 20 (or the card type recording medium 30) transmit and receive control signals and audio data according to the time chart shown in FIG.

As shown in FIG. 5A, the I / O client 11 transmits the statuses BS0, BS1,
There are four, BS2 and BS3. Status BS1,
When the status is BS2, the host computer 10 performs a predetermined operation, and when the status is BS0 or BS3, the PC interface adapter 20 or the card-type recording medium 30 performs a predetermined operation.

When the status is BS0, both the I / O client 11 and the I / O register 42 are in an idling state and do not output any data. I / O client 11
Starts transmission of the TPC signal, the status becomes BS1.

In the status BS 1, the I / O client 11 transmits the I / O register 42 via the PC bus 17.
5B, a TPC signal for writing data is transmitted as shown in FIG. 5B, and a serial clock SCLK is transmitted as shown in FIG. 5C. TPC
When the transmission of the signal is completed, the status becomes BS2.

In the status BS2, the I / O client 11 sends the I / O register 42, for example, the HDD
13 is transmitted.

Here, before transmitting the audio data, the I / O client 11 reads the unique ID in the file header of the audio data, and further transmits the unique ID from the ROM 43 through the I / O register 42 to the PC interface board 20. Is also read.
The I / O client 11 uses these two unique IDs.
The audio data is transmitted to the I / O register 42 when the authentication is performed. Although the I / O client 11 performs authentication using the unique ID in the file header of the audio data, the I / O client 11 may perform authentication using its own unique ID. Also, the I / O client 11 does not transmit the audio data when the unique ID cannot be authenticated.

When the transmission of the audio data is completed, the I / O client 11 transmits a CRC signal which is a code for performing error correction. Audio data is recorded in the flash memory 32 of the card type recording medium 30 via the PC interface adapter 20. When the transmission of the CRC signal ends, the status becomes BS3.

In the status BS3, the I / O register 4
2 transmits to the I / O client 11 a busy signal BSY indicating that the flash memory 32 is recording audio data, and upon completion of the recording, a ready signal indicating that preparation for receiving the next command is completed. Signal R
Send DY. Then, when the transmission of the ready signal RDY ends, the status becomes the status 0 again.

In the recording / reproducing system 1, the HD
Similar processing can be performed when the software stored in D13 is recorded on the card type recording medium 30. Here, a case where copyrighted music software is downloaded from the host computer 10 to the card type recording medium 30 will be described as an example.

First, the I / O of the host computer 10
The client 11 determines the unique ID of the client 11 and the unique ID of the ROM 43 in the PC interface board 20.
Authentication is performed to confirm that D matches. If the I / O client 11 cannot be authenticated because the unique IDs do not match, the I / O client 11 stops downloading. I / O client 1
1 is HD if the unique ID matches and authentication succeeds.
The music software of D13 is transmitted to the PC interface board 20 via the PC bus 17.

The redundant area register 41 of the PC interface board 20 writes a copyright flag indicating that the music software has a copyright and supplies it to the serial protocol control unit 22. The I / O register 42 supplies music software from the I / O client 11 to the serial protocol control unit 22. Then, the serial protocol control unit 22 transmits the copyright flag and the music software to the card-type recording medium 30.

The memory controller 31 of the card type recording medium 30 writes the copyright flag in the redundant area of the flash memory 32 and writes music software in the normal area. Note that the memory controller 31 may write the copyright flag in a file header of the music software.

Next, a case where music software is read from the card type recording medium 30 and copied to the host computer 10 will be described. Serial protocol control unit 22
Supplies the copyright flag to the redundant area register 41 when reading the music software from the card type recording medium 30,
The music software is supplied to the I / O register 42.

When the redundant area register 41 does not detect the copyright flag, the I / O register 42 transmits the music software to the I / O client 11 as it is. On the other hand, when the redundant area register 41 detects the copyright flag, the I / O register 42 performs an authentication process. That is, the I / O register 42 stores the unique I / O
The authentication of the uniqueness of D and the I / O client 11 is performed. If the authentication is successful, the music software is transmitted to the I / O client 11. Do not send. That is, the host computer 10 and the PC interface board 20
If they do not correspond to each other, music software cannot be copied from the card-type recording medium 30 to the host computer 10.

In order to operate the above-mentioned I / O client 11 and other circuits, the control program may be installed in the host computer 10 from a program recording medium on which the control program is recorded.
As such a program recording medium, authentication is performed to confirm that the unique ID of the audio data stored in the host computer 10 matches the unique ID of the PC interface board 20. When the host computer 1
Stop transmitting the audio data stored in 0,
If the unique ID matches and the authentication is successful, the audio data stored in the host computer 10 is transferred to the P
It is preferable that a control program for transmitting the audio data to the C interface board 20 and recording the transmitted audio data on the card 6 type recording medium 30 via the PC interface board 20 be recorded.

The program recording medium for preventing unauthorized copying of music software includes the unique ID of the host computer 10 and the PC interface board 2.
0 and the host computer 1 if the unique ID cannot be authenticated.
Stop transmitting the audio data stored in 0,
When the unique ID is successfully authenticated, a copyright flag is added to the audio data stored in the host computer 10 and transmitted to the PC interface board 20. The transmitted audio data is transmitted via the PC interface board 20. It is desirable that a control program to be recorded on the card type recording medium 30 be recorded.

As described above, the recording / reproducing system 1
Can be read from the card type recording medium 30 to the host computer 10.
When the audio data is read into the host computer 10, the audio data read into the host computer 10 is reproduced.
Each time a process such as recording audio data or software from the host computer 10 to the card-type recording medium 30 is performed, authentication of whether the unique ID of the host computer 10 matches the unique ID of the PC interface board 20 is performed. Is going. Therefore,
Unless the pair of host computers 10 and the PC interface board 20 are always connected, it is impossible to read, transfer, or reproduce audio data.

That is, in the recording / reproducing system 1,
Although the unique ID is authenticated to prevent unauthorized copying, even if audio data that has been illegally copied by some method is captured, the playback of the audio data and transfer to other devices are prevented, It is possible to effectively prevent unauthorized copying of audio data.
Thereby, for example, the audio data stored in the card type recording medium 30 is temporarily transferred to the host computer 10.
, And cannot be recorded from the host computer 10 to another card-type recording medium 30.

In the above description, the host computer 10
Although the audio data is exchanged between the PC and the card-type recording medium 30 via the PC interface board 20, the card-type recording medium 30 may be directly connected to the host computer 10. In this case, an interface control unit for exchanging data with the card type recording medium 30 may be provided inside the host computer 10. At this time, the unique ID of the PC interface board 20 is in the host computer 10 itself.

Although the present embodiment has been described by taking audio data as an example, the present invention is not limited to this. For example, the present invention is similarly applied to video data and computer programs for software. Of course you can.

Although the flash memory has been described as an example of the solid-state memory, it is needless to say that the present invention can be applied to a semiconductor memory such as a nonvolatile RAM.

[0063]

As described above in detail, according to the digital signal recording system, the digital signal recording method and the program recording medium of the present invention, the unique ID of the storage device and the unique ID of the adapter device match. If the unique ID cannot be authenticated, the transmission of the digital signal stored in the storage device is stopped. If the unique ID can be authenticated, the digital signal stored in the storage device is copyrighted. By transmitting a digital signal with the flag added to the adapter device and recording the transmitted digital signal on the recording medium via the adapter device, when the storage device and the adapter device do not correspond, Cannot copy digital signal to Thus, it is possible to prevent digital signals from being illegally copied from one storage device to a plurality of recording media.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a digital signal storage system to which the present invention is applied.

FIG. 2 is a diagram illustrating a redundant area register of the digital signal storage system.

FIG. 3 is a diagram illustrating an I / O register of the digital signal storage system.

FIG. 4 is a time chart for explaining reading of audio data from a card type recording medium of the digital signal storage system to a host computer.

FIG. 5 is a time chart for explaining recording of audio data from a host computer of the digital signal storage system to a card type recording medium.

[Explanation of symbols]

1 recording and playback system, 10 host computer, 1
6 HDD, 20 PC interface board, 21
PC interface controller, 22 serial protocol controller, 30 card type recording medium, 32 flash memory

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C053 FA13 FA27 GB11 JA01 JA21 JA30 KA05 KA24 LA11 LA14 5D044 AB05 BC01 CC04 CC08 DE03 DE17 DE49 DE50 DE52 DE60 GK12 HH13 HL08 HL11 5J104 AA07 AA13 KA02 KA10 NA21 PA14

Claims (7)

[Claims] 1. An adapter device having a recording medium for recording a digital signal, first storage means for storing a unique ID, and a flag adding means for adding a copyright flag to the digital signal, and storing the digital signal. A second storage unit, a third storage unit for storing a unique ID, a first reading unit for reading a digital signal from the second storage unit, and a unique ID stored in the third storage unit. The first
A first authentication unit for authenticating that the unique ID stored in the storage unit matches, and a digital signal read by the first reading unit when the first authentication unit has authenticated. A first transmission unit for transmitting to the adapter device, and stopping transmission of the digital signal read by the first reading unit when the first authentication unit cannot be authenticated. The flag adding means of the adapter device adds the copyright flag to the digital signal transmitted from the first transmitting means, and the recording medium stores the digital signal to which the copyright flag has been added by the flag adding means. A digital signal recording system for recording a digital signal. 2. The recording medium according to claim 1, wherein said recording medium comprises a flash memory, wherein said copyright flag is recorded in a redundant area of said flash memory. Is recorded in a normal area of the flash memory. 3. The adapter device includes: a second reading unit that reads a digital signal from the recording medium; and a flag detection unit that detects whether the digital signal read by the second reading unit has a copyright flag. Means, a second authentication means for authenticating that the unique ID stored in the third storage means matches the unique ID stored in the first storage means, and a copyright by the flag detection means. When the flag is detected and the second authentication unit authenticates, the digital signal read by the second reading unit is transmitted to the storage device, and when the copyright flag is not detected by the flag detection unit, or When the second authentication unit fails to authenticate, the transmission of the digital signal read by the second reading unit is stopped. 2. The digital signal recording system according to claim 1, further comprising: a second transmission unit, wherein the second storage unit of the storage device stores a digital signal transmitted from the second transmission unit. 3. . 4. A digital signal recording method for recording a digital signal stored in a storage device on a recording medium via an adapter device, wherein the unique ID of the storage device matches the unique ID of the adapter device. When the unique ID cannot be authenticated, the transmission of the digital signal stored in the storage device is stopped, and when the unique ID is successfully authenticated, the digital signal stored in the storage device is transmitted. A digital signal recording method, comprising: transmitting a digital signal with a copyright flag added thereto to the adapter device; and recording the transmitted digital signal on the recording medium via the adapter device. 5. A digital signal is read from the recording medium, and it is detected whether the read digital signal has a copyright flag. The unique ID of the adapter device matches the unique ID of the storage device. When the copyright flag is detected and the unique ID is authenticated, the read digital signal is transmitted to the storage device, and when the copyright flag is not detected or when the unique ID is
5. The digital signal recording method according to claim 4, wherein when the authentication of D is failed, transmission of the read digital signal is stopped, and the transmitted digital signal is stored in the storage device. 6. A program recording medium in which a control program for recording a digital signal stored in a storage device on a recording medium via an adapter device is recorded, wherein a unique ID of the storage device and a unique ID of the adapter device are recorded. When the unique ID cannot be authenticated, the transmission of the digital signal stored in the storage device is stopped, and when the unique ID is successfully authenticated, the digital signal stored in the storage device is stored. A control program for adding a copyright flag to the digital signal and transmitting the digital signal to the adapter device, and recording the transmitted digital signal on the recording medium via the adapter device. Program recording medium. 7. A digital signal is read from the recording medium, and whether the read digital signal has a copyright flag is detected, and a unique ID of the adapter device matches a unique ID of the storage device. When the copyright flag is detected and the unique ID is authenticated, the read digital signal is transmitted to the storage device, and when the copyright flag is not detected or when the unique ID cannot be authenticated. 7. The program recording medium according to claim 6, wherein a control program for stopping transmission of the read digital signal and storing the transmitted digital signal in the storage device is recorded.