JP3039561B2 - Information recording disk and information reproducing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to an information recording disk which is a disk having a non-recordable recorded area and a non-recordable unrecorded area (hereinafter referred to as a hybrid disk). And an information reproducing method.

(Prior Art) In recent years, while various recordable write-once discs have been proposed, an area in which data is recorded in advance in a desired area of the disc (hereinafter, referred to as a ROM area) and A hybrid disc having a recordable area (hereinafter referred to as a recordable area) has been proposed.
This enables the user to freely record information in addition to a conventional package medium such as a compact disk, and thus leads to an added value of the medium.

In such a hybrid disc, it is desirable that the inner peripheral side of the disc be a ROM area and the outer peripheral side be a recordable area so that at least the ROM area can be reproduced by a conventional compact disc player.

In addition, TOC which records TOC (Table Of Contents) information in which the absolute time recorded on the disc, the start time of each track, and the like are recorded in advance in the inner circumference of the ROM area in absolute time.
Although it is necessary to provide the C area, it is also necessary to store comprehensive TOC information on the data recorded in the post-recordable area at any time.
It is necessary to provide a landing area corresponding to the area.

(Problems to be Solved by the Invention) However, the data to be recorded is not always completed by one data, and is subsequently added sequentially.

Therefore, it is necessary to access the disc to the end of the data and detect whether or not there is a recordable unrecorded area following the disc prior to the recording or reproducing operation.

However, in a data unrecorded area, there is no synchronization signal for controlling the reproducing apparatus and other control data, so that the player may run out of control.

The present invention has been made in view of such a situation, and an object of the present invention is to provide an information recording disk and an information reproducing method capable of preventing a runaway of a player.

(Means for Solving the Problems) An information recording disc according to claim 1 of the present invention is a hybrid disc having a non-recordable recorded area and a recordable non-recorded area. Landing area containing track information
Data and a lead-out area are recorded in the landing area, and identification information for identifying whether or not the next write-once unit can be accessed is recorded.

An information recording disc according to claim 2 of the present invention is a hybrid disc having a recorded area on which data cannot be recorded and an unrecorded area on which data can be recorded, wherein a recording unit to be additionally recorded on the unrecorded area has track information. Divided into a first recording unit composed of a landing area and data not to be used, a second recording unit composed only of data, a landing recording area having track information, and a third recording unit composed of data and a lead-out area And record
In the landing area having the track information, identification information for identifying whether or not the next write-once unit can be accessed is recorded.

According to a third aspect of the present invention, there is provided an information reproducing method, comprising: a recorded area in which additional recording is not possible; and an unrecorded area in which additional recording is possible, wherein the information additionally recorded in the unrecorded area includes at least landing information including track information. A method for reproducing information recorded on a hybrid disc in units of an area, a program area in which data is recorded, and a lead-out area, wherein a landing area of the hybrid disc is sequentially accessed, and a track located at the rear end is accessed. The present invention is characterized in that the access permission / inhibition information of the next additional recording unit in the landing area including the information is read, and the access is stopped according to the result of the reading.

(Operation) According to the information recording disk of the present invention, it is determined whether or not one of the data blocks to be recorded can access the data to be recorded next at a position preceding the data block. The landing area including the identification information to be recorded is recorded.

According to the information recording disk of the present invention, the data to be recorded is divided into a plurality of data blocks, and the data to be recorded next is placed at a position preceding the data block located at the end of the plurality of data blocks. A landing area including identification information for identifying whether access is possible is recorded.

According to the information reproducing method of the third aspect, the last one of the landing areas is sequentially accessed,
The access permission / inhibition information for the next data block included in the landing area is obtained. When the access inaccessibility information for the next data block is obtained, the access to the next data block is stopped.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

First, the physical configuration of the hybrid disk used in the present invention will be described.

FIG. 7 is a plan view showing the ROM area and the recordable area in the hybrid disc,
There are a type A in which an area is formed by pits as in a conventional compact disk and the like, and a type B in which a mark is formed on a recording thin film similar to a recordable area.

FIG. 7 (a) shows the disk format of a type A hybrid disk, in which the left side of the drawing is the disk inner circumference and the right side is the disk outer circumference.

At a predetermined position on the innermost circumference of the disk, a lead-in area is provided similarly to a conventional compact disk, in which the total recording time of the following ROM area, the number of tracks in the ROM area, And TOC information indicating the start time difference between the tracks in the ROM area.

A program area is formed following the lead-in area, and a lead-out area is formed at the end of the ROM area. That is, when focusing only on the lead-in area, the program area, and the lead-out area, a disk format similar to that of a conventional compact disk is configured.

At a position following the ROM area, a recordable area is formed with an appropriate non-recording area therebetween. A PCA (Power Carribration Area) is placed at the beginning of the recordable area.
A PMA (Program Memory Area) is provided. Details of these will be described later.

Subsequently, a landing area is formed as a period corresponding to the above-described lead-in area, and a program area is subsequently formed.

FIG. 7B shows a disc format of a type B hybrid disc.

In type B, the ROM area also has the same physical characteristics as the recordable area, and the PCA and PMA described above are provided further inside the lead-in area of the ROM area. Thereafter, a ROM area is formed by a lead-in area, a program area, and a lead-out area, and a recordable area is provided immediately after the ROM area.

The recordable area and the type B ROM area have pre-grooves formed in advance, and are used for tracking control so that recording is performed along the pre-grooves.
The pre-groove is wobbled at a predetermined frequency, and the wobbling frequency is specified, for example, at 22.05 KHz, and is used as a signal for spindle servo during recording. Of course, it may be used at the time of reproduction.

The wobbled groove is frequency-modulated so as to represent data representing the absolute time on the disk. Even on an unrecorded disk, the absolute time (ie, address information) can be obtained by demodulating the data. .

The above-described PMA is an area in which the start time and the end time of a track (song in the case of audio data) to be recorded are recorded. In the conventional compact disc format, information corresponding to these is recorded as TOC information in the lead-in area, but in the case of a hybrid disc,
The start / end of each track is uncertain due to the data recorded in the unrecorded portion, and the start / end time is recorded in the PMA in response to the new track number being incremented.

According to the disc standard, a maximum of 99 track numbers are allowed, so the PMA also has an area corresponding to this.

The PCA area is a test cutting area for defining the laser power during recording to an optimum value.

FIG. 1 shows the configuration of an embodiment of the above-described hybrid disk recording / reproducing apparatus.

In the figure, the disk 10 is rotatable by a spindle motor 22, and the rotation of the spindle motor is controlled by a spindle servo circuit 21.

The signal on the disk read by the optical pickup 11 is
The data is supplied to a data demodulation circuit 13, a slider servo circuit 18, an actuator servo circuit 20, and a wobble detection unit 23 via an HF (high frequency) amplifier 12.

The data demodulation circuit 13 is for demodulating digital data from the read RF signal, and is an EFM for demodulating EFM-modulated data into 16-bit digital data.
Demodulation unit 13a, clock extraction unit 13 for extracting the recovered clock
b, a sync detector 13c for detecting a synchronization signal, a data extractor 13d for extracting control data (address, control data, etc.) in the signal, a subcode demodulator 13e for demodulating subcode data, and The descrambler 13f for returning the data to the disk, the RAM 13g from which the data is read under the control of the descrambler 13f, the RAM 13g from which the data is read, and the CIRC correction unit 13h for detecting and correcting and interpolating the data error. It is configured. Then, data read from the RAM 13g by the descrambler 13f becomes reproduction data.

The slider servo circuit 18 has the pickup 11 mounted thereon,
It controls the movement of a slider (not shown) movably supported in the radial direction of the disk in the radial direction of the disk. More specifically, the DC component of the tracking error signal obtained from the reproduction signal is transmitted to the slider mechanism 19. To be applied.

The actuator servo circuit 20 includes a focus servo for accurately converging a beam spot on the disk 10,
This is a circuit that drives an actuator for tracking servo or the like for the beam spot to follow the track.

The spindle servo circuit 21 makes the wobbling frequency detected by the wobble detection unit 23 constant for an unrecorded disk, and sends a drive signal to the spindle motor 22 so that the reproduced clock has a predetermined frequency for a recorded disk. Is to give.

The wobble detector 23 generates an envelope-detected signal because the amplitude of the RF signal component fluctuates due to, for example, meandering of the groove. Since the wobbling information detected by the envelope indicates the data indicating the absolute time of the disk as described above, the wobbling information is detected by the ATIP (Absolute Time In Pre-groove) detecting unit 24, and the detected absolute time is detected by the system. Controller section 16
To supply.

The system controller 16 controls the entire recording / reproducing apparatus shown in FIG. 1, and is provided with a memory 17 for storing track information including TOC information.

On the other hand, 14 is a data modulation circuit used at the time of recording, and the recording data input via the line 28 generates a CIRC adding section 14c for adding a CIRC code, an interleave circuit 14a for performing interleaving, a RAM 14b, and a subcode. Sub-code 14e, an EFM modulator 14d for EFM-modulating digital data processed by these, a sync adding unit 14f for adding a synchronization signal, and the like, and the data generated by the data modulation circuit 14 drives a laser diode. Is modulated by a diode drive circuit 15 for the optical disc, and the optically modulated signal is supplied to a laser diode in the pickup 11 and recorded on the disk 10 by the modulated light beam.

Reference numeral 26 denotes a loading mechanism for loading or discharging a disk onto or from a spindle motor, and is driven by a loading driver 25 controlled by a control signal from the system control unit 16.

FIG. 2 shows an information supply apparatus for supplying information to be recorded to the information recording and reproducing apparatus shown in FIG.

As shown in the figure, the information supply device is provided with a host computer 33 that stores data read from a data storage 31 such as a CD-ROM in a buffer memory 32 and sends the data to the hybrid disk recorder unit side. ing.

Then, a command is supplied to the system control unit 16 of FIG. 1 via the bus line 27. Also, data to be recorded is supplied to the data modulation circuit 14 of FIG. 1 via the bus line 26.

The data to be recorded on the disk 10 needs to be managed as data blocks.

For this reason, the host computer 33 manages the data length to be recorded and calculates the block length required for one data block. Also, it sends out control such as writing of landing data and lead-out to the system control unit 16, and furthermore, when there is a data transfer waiting time for the recording / reproducing apparatus 1, interruption of reading of the data storage 31 is performed.
It also controls resumption, etc.

Here, a case where the data to be recorded fits in one data block on the disk 10 and is completed will be described.

FIG. 3A shows a state in which one unit including a landing area, data, and a lead-out area is continuously recorded in a recordable area subsequent to a ROM area. In the figure, two units have been recorded, and after that, are unrecorded, but may be recorded in an unrecorded area following this in the future.

In this case, the host computer sends a command to the system control unit 16 to write the following information in the landing area.

All the information written in the latest landing area, including the information in the lead-in area in the ROM area,
Information about the data block to be written.

Start address information of a data block to be recorded next (hereinafter, these information are collectively referred to as track information).

Here, the start time of the next data block to be recorded should be defined by adding the time required for lead-out and landing area to the length of the data block to be written, since the length has been calculated in advance by the host computer. Can be.

On the other hand, FIG. 3 (b) shows that one unit consisting of a landing area, data and a lead-out area is continuously recorded in the record information of the recordable area following the ROM area as in FIG. 3 (a). The figure shows that no data is written after the data written at the end.

This includes the case where the recordable area on the disc has reached the physical limit and the recording is prohibited in the remaining recordable area by a command from the host computer 33.

In such a case, control is performed such that only the above-described information is recorded in the landing area when the last data block is written, and the leading address information of the subsequent data block is not recorded.

Thus, the end of the data on the disc can be determined based on whether or not the start address information of the next data block is recorded in the landing area.

This means that when reading out the TOC information prior to reproduction, it is necessary to access the last landing area, but if it is determined that the next data does not exist, the TOC information can be determined at that time.

FIG. 3 (c) shows the recording contents when the data to be recorded does not fit in one data block and is divided into a plurality of data blocks and recorded.

In the case of FIGS. 3 (a) and 3 (b), each landing area is provided prior to each data block. However, when a plurality of divisional recordings are made, each landing area is useless. Therefore, an imaginary landing area having no track information is formed at a position preceding the first data block when the divided data is 1 to N,
Further, only data blocks are recorded in the data blocks from 2 to N-1.

Then, a landing area including the above information is formed at a position preceding the data block N which is the final data, and a lead-out area is recorded after the end of the data block N.

In this case, when the host computer instructs not to write subsequent data, writing only the above information is the same as the description of FIG. 3B.

In this case, since a substantial landing area is recorded only at the end of the divided data block, the recording / reproducing apparatus operates in exactly the same manner as the recording format shown in FIGS. 3 (a) and 3 (b). The tail of the data can be determined.

Here, the landing area includes (a) a landing area including the TOC information and a start address of the next data block. (B) a landing area including the TOC information and not including the start address of the next data block. There will be a landing area that does not contain any information.

 An example for identifying these will be described below.

In the landing area, information is recorded in a data format conforming to the compact disc format.

Here, the subcode on the compact disc will be described with reference to FIG.

FIG. 4 shows the Q data format in the subcode.

In the figure, S0 and S1 are sub-coding syncs, and the CONTROL section has presence / absence of emphasis and 2 channels / 4
A flag for discriminating channels is indicated by a 4-bit configuration.

The subsequent ADR is 4-bit data for determining the mode, and the modes 1 to 3 up to now are used. CRC is a 16-bit Cyclic Redundant for error correction.
An ancy check character, and these data groups are repeatedly recorded.

Next, DATA-Q differs in the information content carried by the information in the program area and the lead-out area and the information in the lead-in area.

In the program area, track numbers (TN
O), index code (X), elapsed time in track (MIN, SEC), frame (FRAME), ZERO fixed at 0 bit, absolute elapsed time (AMIN, ASEC), and absolute frame (AFRAME) are recorded. You. This information is recorded in the Q data in the data block in the recordable area.

On the other hand, in the Q data in the lead-in area,
The track number (TNO) is fixed to “00”, and POINT, PM
TOC information is stored in IN, PSEC, PFRAM, PMIN, PSEC, PFRAM
Gives the start position and the like of the track indicated by POINT. PMIN, PS when POINT = A2 is indicated
EC and PFRAM indicate the lead-out start time, that is, the time information and the frame at the end of the data.

If the disc is a hybrid disc, mode = 5
, The start time of the first data block in the recordable area is represented by MIN, SEC, and FRAM when POINT = B0. Similarly, the start time of the lead-out area from the outermost possible outer periphery of the recordable area (that is, the time located at the end of the recording area) is represented by PMIN, PSEC, and PFRAM when POINT = B0.

In the Q data in the landing area, information of data to be newly recorded including the information of the landing area recorded immediately before is updated and recorded together with the above information. Accordingly, the TOC information of the last landing area indicates the TOC information of all data recorded on the disc.

For example, by setting the mode recorded in the ADR to mode = 5, it is identified that the disc is a hybrid disc. Whether the disc is a type A or a type B is determined by recording 00 in the ZERO data when POINT = B0. If a type A or 01 is recorded, it is determined that the disc is a type B disc.

Further, the identification information (a) to (c) described above is identified by data recorded in the POINT.

For example, data (a) and (b) having substantial track information is set to POINT 00 with mode = 5.

For example, PMIN, PSEC, PFRAME corresponding to POINT = 01 to 99 indicates the start position of each track.

When POINT = A0, the information shown in PMIN indicates the first track number of the recordable area. This is a number obtained by adding 1 to the last track number in the ROM area.

When POINT = A1, indicates the last track number recorded in the recordable area by the information indicated by PMIN.

When POINT = A2, the start time of the lead-out area of the recordable area (that is, the last time of the data block) is recorded in PMIN, PSEC, and PFRAME.

When POINT = A3, PMIN, PSEC, and PFRAME indicate the start time of the data block of the next recording unit in the recordable area.

Therefore, if POINT = A3 is recorded, it is identified as a landing area having the information of (a), and
If T = A3 is not recorded, the information is identified as (b), and can be used as information prohibiting access to the next data block.

On the other hand, in the landing area (c) having no track information, identification is possible by fixing POINT = 00.

In short, it is sufficient that the Q data include unique identification data indicating which one of the landing areas (a) to (c).

Next, a recording / reproducing method of the hybrid disc recorded as described above will be described.

First, it is necessary to identify whether or not the disc is a hybrid disc before the recording operation, and if the disc is a hybrid disc, it is necessary to identify whether the disc is a type A or a type B. After that, it is necessary to take in the TOC information of the information portion that has been recorded up to that time, and determine whether or not recording is possible in an unrecorded area.

An example of these series of operations will be described with reference to the flowchart shown in FIG.

First, at step 501, the track information stored in the memory 17 is cleared, and the track information of the preceding lead-in area in the ROM area is read (step 502). The read track information is stored in the memory 17 in step 503.

MODE as the mode of the track information read here
= 5, it is determined that the disk is a hybrid disk. If it is determined in step 504 that the disk is a hybrid disk, the process proceeds to step 505 to determine whether the disk is a type A disk. As described above, this can also be determined from the ZERO data when POINT = B0 in the track information.

Therefore, the type A disk and the type B disk have different positions on the disk where the PMA area is located.
If it is type A, the type A PMA area is accessed in step 506 to read the start address of the last track, and if it is type B, the type B disk PMA area is accessed in step 507 and the start address of the last track is read. Read.

Here, since the landing area is set to be recorded for one minute prior to the data block, a search is made for a range that is within one minute from the start address of the last track (step 508). For the details of the search operation at this time, a known technique is appropriately used, and the details are omitted.

When the target point is accessed, it is determined in step 509 whether or not a landing area exists there. Because it is allowed that a plurality of track numbers exist in the same data block, there is a possibility that the data of the previous track number is recorded immediately before the last track. Is because the landing area cannot be read. Therefore, if there is no landing area at this point, in step 511, a search is made for the landing area including the track information located at the beginning of the data block while sequentially reading the reproduced data at a low speed. When the landing area can be read, the process proceeds to step 510, and the track information is stored in the memory 17.

Here, whether the next recording area can be written, that is, POIN
It is determined whether T = A3 is indicated, and if the recording is not possible, the recording operation is prohibited. On the other hand, if recording is possible, the range up to one minute before the start time of the next data block recorded in the Q data is accessed in step 514,
At step 515, the information to be recorded in the landing area, that is, the track information recorded until immediately before, the updated track information on the data to be newly recorded this time is recorded.

Thereafter, in step 516, a data block is recorded, and in step 517, a lead-out area is recorded. And finally, the start address associated with the recorded data block,
At step 518, data such as an end address is recorded in the PMA area, and a series of recording operations is completed.

Note that the lead-out area is recorded immediately after step 516. However, in the case of recording in the recording format shown in FIG. It is needless to say that the area is recorded and the lead-out area is written after writing the Nth data block.

This series of instructions is issued from the host computer to the system control unit.

In this manner, whether or not the access to the unrecorded area after the end is permitted or not is determined depending on whether or not the start position of the next data block is recorded in the landing area, and the recording operation is enabled when the access is possible. You.

Next, the operation in reproducing the hybrid disc will be described with reference to the flowchart in FIG.

In step 601, memory 17 is cleared, and in step 602, RO
The lead-in area to be shifted in the M area is accessed, the information is read in step 603, and the read track information is stored in the memory 17 in step 604.

In step 605, it is determined whether or not the disc is a hybrid disc.If it is determined that the disc is not a hybrid disc, there is no need to update the track information stored in the memory because there is no landing area. Transfer and complete playback preparation.

If the disc is a hybrid disc, the starting point of the first data block is read from MIN, SEC, FRAME indicated by POINT = B0, and this is set as the target address in step 606.

Since the target address set here is the start of the data block, the landing area immediately before it is 1
Started more than a minute ago. Therefore, in step 607, access to the landing area calculated from the target address is started.

Next, in the case of a virgin disk, although data is recorded in the ROM area in advance, since nothing is recorded in the recordable area, the landing area is not recorded as a matter of course. Therefore, in step 608, it is determined whether or not the disc is a recorded area, and if the disc has nothing recorded in the recordable area, access preparation is completed.

If the area is a recorded area, the data of the landing area is read, and it is determined whether or not the area is a landing area including track information (step 610). If the area includes track information, the information is stored in the memory 17.

Then, it is determined in step 615 whether or not the start address of the next data block is included.If the start address of the next data block is included, the address is set as a new target address in step 616. Move to 607. If the start address of the next data block is not included, it is assumed that data after the data block does not exist, and the process proceeds to step 617.

At step 610, if the track information is not included in the accessed landing area, that is, if it is the fictitious landing area in FIG. 3 (c), a step is performed to search for a landing area including the track information. The pickup is transferred at a low speed (queue operation) at 612, and a search operation is performed until a landing area is searched (step 613). If it is determined in step 613 that the landing area has been searched, the landing area is read in step 614, and the process proceeds to step 611.

By the above-described access preparation operation, the track information including the TOC information of the recorded data is stored in the memory 17 prior to the reproduction.

In addition, at step 615, it is determined whether or not the start address of the next data block is recorded in the track information included in the landing area, and when this is not recorded, access to the unrecorded area is prevented beforehand. Can prevent runaway of the player.

If it is determined in step 608 that the area is not a recorded area, it means that the area has entered an unrecorded area. At this point, since all track information has been stored in the memory 17, access is not performed. Preparation can be completed, and the risk of runaway of the player is eliminated.

(Effect of the Invention) As described above, in the information recording disk of claim 1, when recording data completed in one data block, a landing area having track information is recorded for each data block. Therefore, it is easy to search for track information to be read prior to recording and reproduction. In addition, since data indicating whether the next data block is accessible or not is recorded in the data in the landing area, it is easy to determine the end of the data block.

In the information recording disk according to the present invention, although data to be recorded is divided into a plurality of data blocks, a landing including track information is recorded only in the last data block, so that the recording capacity of the disk is wasted. Moreover, it is easy to determine the end of the data block in the same manner as in the information recording disk according to the first aspect.

In the information reproducing method according to the third aspect, when storing the latest track information, it is possible to prevent unnecessary access to an unrecorded area by accessing only the landing area, and thus the risk of runaway of the player may occur. Disappears.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of an information recording / reproducing apparatus according to an embodiment of the information recording disk and the information reproducing method of the present invention, and FIG. 2 is information to be recorded on the information recording / reproducing apparatus of FIG. And FIG. 3 (a), (b) and (c) show a format on a disc recorded by the information recording and reproducing apparatus of FIG. FIG. 4, FIG. 4 is a reference diagram of the data format of the subcode, FIG. 5 is a flowchart for explaining an operation for performing a preparation operation at the time of recording, FIG. FIG. 7 is a diagram showing a format on a hybrid disc. 10 ... optical disk, 11 ... optical pickup, 12 ... HF
(Treble range) amplifier, 13 data demodulation circuit, 14 data modulation circuit, 15 LD drive circuit, 16 system control unit, 17 memory, 23 wobble detection unit,
24 …… ATIP detector.

Claims (3)

(57) [Claims] 1. A hybrid disc having a non-recordable recorded area and a recordable unrecorded area, wherein a unit to be additionally recorded in the unrecorded area is a landing area including track information, data and a lead-out area, An information recording disk, wherein identification information for identifying whether the next additional recording unit can be accessed or not is recorded in the landing area. 2. A hybrid disc having a non-recordable recorded area and a non-recordable unrecorded area, wherein a recording unit to be additionally recorded in the non-recorded area comprises a landing area and data having no track information. The recording is divided into a first recording unit, a second recording unit composed only of data, a third recording unit composed of a landing area having track information, data and a lead-out area, and recording is performed. An information recording disk in which identification information for identifying accessibility / inaccessibility to a next additional recording unit is recorded in a landing area having the following. 3. A program which has a recorded area on which no additional recording is possible and an unrecorded area on which additional recording is possible, wherein the information additionally recorded on the unrecorded area includes a landing area including at least track information, and a program on which data is recorded. A method of reproducing information recorded on a hybrid disc in units of an area and a lead-out area, wherein a landing area of the hybrid disc is sequentially accessed, and a landing area including track information positioned at the end is read. An information reproducing method characterized by reading access permission / non-permission information of a certain next additional write unit and stopping access according to a result of the read.