JP3433757B2 - Disc playback device, disc recording device - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to a disk recording apparatus corresponding to the recording medium (disc) for carrying out data recording, disk
It relates to a reproducing device.

[0002]

2. Description of the Related Art A recording device capable of recording / reproducing music and the like, a reproducing device, and a magneto-optical disk as a recording medium have been put into practical use. Those capable of recording voices (so-called mini discs) are also known.

When using this mini disk system,
Although so-called music is recorded / reproduced, it is also conceivable to record / reproduce data other than music information in this mini disk system.

In the present specification, a so-called audio signal such as music or voice recorded on a magneto-optical disk is digitized, and is particularly referred to as "audio data", and one unit thereof is referred to as "song". To do. And
Data other than audio data used by information devices such as so-called computers such as characters and graphics that are recorded on a magneto-optical disk are simply referred to as "data" or "general data" and are distinguished from audio data. Then, one recording / reproducing unit of data is defined as a "data file".

[0005]

However, it is not appropriate to use the mini disk system, which is originally formatted for music, for data so that information can be retrieved or updated. Not really. Especially in the case of music management information for music use, unlike data file management information for data use, name data and attribute data for searching are not important (at least corresponding to the song number). Addresses should be managed), data for sending search data to external devices may not be required, and there are many audio data with a small data volume (for example, very short songs). There is no need to deal with the case where there are a large number of small data files such as general data because it is unlikely to do so. For example, in the management information for audio data described later, a maximum of 25
Only 5 songs are supported.

From these various points, the music management information for music use is generated to be suitable for music use, and cannot be said to be suitable for data. That is,
For example, there is a problem that it is not appropriate to expand the mini disk system for recording and reproducing general data by using the management system as it is. Although the mini disk system is taken as an example, the same thing can be said for the recording / reproducing system for music of other systems.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a recording / reproducing system for music has been extended to data recording / reproducing so that it can be used for both audio data and general data. to record / disc Symbol recording apparatus that can be reproduced, and an object thereof to provide a disk reproducing apparatus.

To this end, the disk reproducing apparatus of the present invention
The audio data that is recorded
Area and general data area where general data file is recorded
Area and each audio recorded in the audio data area.
Start address and end address for each audio data and above
Manage the start and end addresses of the general data area
A first management area in which the first management information to be processed is recorded,
The entire audio data area is a single data file
An identifier that identifies a recording / playback prohibited area
And each general data recorded in the above general data area.
The second consisting of the file start position address for each file
A disc having a second management area in which management information is recorded.
In a disc reproducing device capable of reproducing a rectangular recording medium,
The second management area is attached to the mounted disc-shaped recording medium.
And a discriminating means for discriminating whether or not the area exists.
The second disk is attached to the mounted disk-shaped recording medium in a step.
When it is determined that the management area exists, the second
In the above identifier in the second management information recorded in the management area
Recording and playback of the entire audio data area based on
It is prohibited and is recorded in the second management area.
The file for each general data file in the second management information
Each general data file is
And a control means for accessing the file.
It

Further , as the disk recording apparatus of the present invention,
Audio data area where audio data is recorded
And the general data area where the general data file is recorded
And each audio recorded in the audio data area.
Recordable start address and end address for each audio data
Active area start address and end address and the above general data
First to manage the start and end addresses of the entire area
The first management area in which the management information of the
The entire biodata area is treated as one data file
The identifier for identifying the recording and playback prohibited area and the above general
For each general data file recorded in the data area
The second management information consisting of the file start position address
A disk-shaped recording medium having a recorded second management area
In a disc recording device that can record on the body,
The second management area on the disk-shaped recording medium
First discriminating means for discriminating whether or not management information exists
And the disk shape mounted by the first discriminating means
The second management information exists in the second management area on the recording medium.
If it is determined not to do so, the mounted disc above
The first management information in the first management area on the recording medium.
Second discriminating means for discriminating whether or not there exists;
By the discriminating means, the above-mentioned disc-shaped recording medium is
It is determined that the first management information exists in the first management area.
If it is recorded, it can be recorded in the first management area.
Recording is possible based on the start address and end address of the area
The calculation means for calculating the capacity and the calculation means
The recordable capacity and the size of the general data file you want to record
The comparison means for comparing the file size and the comparison means
I want to record with the recordable capacity calculated by the above calculation means.
Determined to be larger than the file size of the general data file
Of the general data file you want to record above
Record and record the second management information in the second management area
And a recording means.

[0010]

By providing management information suitable for data file management for general data in addition to management information provided for audio data, for example, a recording medium for music can be expanded for data, and audio data and general data can be used. It is possible to realize a recording medium compatible with both data.

At this time, the audio data management information has management information capable of identifying and managing the audio data area and the general data area, while the general data management information includes the management information for the audio data area. By providing the management information for prohibiting the recording and reproducing operation, the part used as the audio data area and the part used as the general data area in the recording / reproducing area of the recording medium are clearly managed, Erroneous recording / erase / reproduction error due to data mixture is prevented.

In the case of reproducing audio data, the disk reproducing apparatus may use audio data management information. In other words, the portion used as the audio data area and the portion used as the general data area in the audio data management information are managed without referring to the general data management information, so that the general data is mistakenly written. There is no reproduction and output error.

Similarly, when reproducing general data, the general data management information may be used. That is, in the general data management information, the audio data area is managed as a recording / reproduction prohibited area, so that audio data will not be reproduced by mistake.

When recording audio data, the disk recording apparatus performs required management information updating processing on audio data management information according to the recording operation. That is, since the recording operation is performed in the audio data area and the general data area is not affected by the recording operation, it is not necessary to update the general data management information.

On the other hand, when recording a general data file, it is of course necessary to perform necessary management information update processing on the general data management information according to the recording operation. When the volume of the data file to be recorded is large and the general data area is expanded for recording, a required management information updating process is required for the audio data management information. In other words, it becomes necessary to rewrite the management information for identifying and managing the audio data area and the general data area in the management information for audio data, and by updating in this way, the audio data area and the general data area can be properly maintained thereafter. It is possible to coexist on one recording medium.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk format and a disk recording / reproducing apparatus as embodiments of the present invention will be described below in the following order. 1) Appearance and configuration of disc and disc recording / reproducing apparatus 2) P-TOC format on disc 3) U-TOC format on disc 4) Area structure on disc 5) Format of sector for data 6) Data file by data U-TOC Management method 7) Relationship between management by data U-TOC and management by U-TOC 8) Recording / reproducing operation by data U-TOC management

<1. Appearance and Configuration of Disc and Disc Recording / Reproducing Apparatus> FIG. 1 shows appearances of a recording / reproducing apparatus and a disc according to an embodiment. Although a magneto-optical disk is used as the disk 1, as shown in FIG. 1, the outside thereof is housed in a cartridge K, and the disk recording surface is exposed by sliding a shutter S. The recording / reproducing apparatus 10 is provided with a disc insertion portion 11 into which a cartridge K accommodating a disc 1 is loaded. When the cartridge K is inserted into the disc insertion portion 11, the shutter S is slid by an internal mechanism (not shown). Then, the disc surface of the disc 1 is exposed to enable recording or reproduction.

On the upper surface of the housing of the recording / reproducing apparatus 10, there are provided a key input section 12 for user operation and a display section 13 for displaying and outputting menu information for data retrieval and retrieved data. . As the key input unit 12, a cursor movement key, an enter key, a data input key, etc. are provided. An image scanner unit 14 detects image information written on the paper surface, converts it into dot data, and inputs it as image data.
Further, 15 is an input / output connector section, which is a communication cable C
Other information equipment (computer,
It is designed to be able to send and receive data to and from word processors.

Reference numeral 16 is a terminal used for inputting / outputting an analog audio signal, and is used for inputting a line of a voice signal reproduced from the disc 1 or a voice signal to be recorded on the disc 1 to another acoustic device via an audio code 17. Output is made.

The structure of the main part of the recording / reproducing apparatus 10 is shown in FIG. In FIG. 2, the disk 1 (the cartridge K accommodating the disk 1) is shown as loaded.
Reference numeral 21 denotes a system controller for controlling various operations of the recording / reproducing apparatus, which is formed by, for example, a microcomputer. Reference numeral 22 denotes a spindle motor, and the loaded disk 1 is rotationally driven by the spindle motor 22. Reference numeral 23 denotes an optical head for irradiating a laser beam on the disk 1 at the time of recording / reproducing, which provides a high level laser output for heating a recording track to the Curie temperature at the time of recording, and a reflected light by a magnetic Kerr effect at the time of reproducing. Provides a relatively low level laser power for detecting data from the.

Therefore, the optical head 23 is equipped with a laser diode as a laser output means, an optical system including a deflecting beam splitter, an objective lens and the like, and a detector for detecting reflected light. Objective lens 23a
Is held by a biaxial mechanism 24 so as to be displaceable in the disk radial direction and the direction in which it comes in and out of contact with the disk, and the entire optical head 23 is movable in the disk radial direction by a thread mechanism 25.

Reference numeral 26 denotes a magnetic head which applies a magnetic field modulated by the supplied information to the magneto-optical disk, and is arranged at a position facing the optical head 23 with the disk 1 interposed therebetween.

The information detected from the disk 21 by the optical head 23 by the reproducing operation is supplied to the RF amplifier 27. The RF amplifier 27 calculates the supplied RF signal, the tracking error signal, the focus error signal, the absolute position information (absolute position information recorded as pregroove (wobbling groove) on the disc 1), and the address information by calculating the supplied information. , Subcode information, focus monitor signal, etc. are extracted. Then, the extracted reproduction RF signal is supplied to the decoder unit 28. Further, the tracking error signal and the focus error signal are supplied to the servo circuit 29. Further, the focus monitor signal is supplied to the system controller 21.

The absolute position information obtained by decoding the pregroove information or the address information recorded as data, which is output from the address decoder 29, is supplied to the system controller 21 via the decoder unit 28, and various kinds of information are supplied. It is used for the control operation of.

The servo circuit 29 supplies the supplied tracking error signal, focus error signal, track jump command, seek command from the system controller 21,
Various servo drive signals are generated based on rotational speed detection information, etc. to control the biaxial mechanism 24 and the sled mechanism 25 for focus and tracking control, and the spindle motor 22 to have a constant angular velocity (CAV) or a constant linear velocity (CL).
V).

The reproduced RF signal is subjected to decoding processing such as EFM demodulation, CIRC decoding, and ACIRC decoding in the decoder section 28, and is then subjected to predetermined processing via the system controller 21.

Further, the information supplied to the system controller 21 as the information to be recorded on the disk 1 during the recording operation is subjected to encoding processing such as ACIRC encoding, CIRC encoding and EFM modulation in the encoder section 30, and then the magnetic head driving circuit. 31 is supplied.

The magnetic head drive circuit 31 supplies a magnetic head drive signal to the magnetic head 26 in accordance with the encoded recording data. That is, the magnetic field 26 is applied to the disk 1 by the magnetic head 26.
Further, at this time, the system controller 21 supplies a control signal to the optical head 23 so as to output a laser beam of a recording level.

Reference numeral 32 denotes a conversion memory for converting the code data into font data, which performs font conversion processing for displaying the character data read from the disk 1.

Reference numeral 33 denotes a buffer RAM, which temporarily holds dot data captured by the image scanner 14, display data displayed on the display unit 13, transmission / reception data by the connector unit 15, and read from the disk 1. It also functions as a temporary storage when outputting audio data and data files.

When the recording / reproducing operation is performed on the disc 1, management information recorded on the disc 1, that is, premastered TOC (hereinafter referred to as P-TOC) and audio data recording / reproduction management are performed. TOC for
(Hereinafter referred to as U-TOC), and TOC for managing general data recording / reproduction (hereinafter referred to as data U-TOC)
The system controller 21 discriminates an address to be recorded and an address to be searched for data and reproduced according to the management information, and the management information is held in the buffer RAM 33. That is, the system controller 21 sends these management information to the disk 1
When the disc is loaded, the management information area (for example, the innermost circumference side of the disc) is read out by executing the reproduction operation, stored in the buffer RAM 33, and can be referred to in the recording / reproducing operation for the disc 1 thereafter. I am trying.

In addition, U-TOC and data U-TOC
Is rewritten in response to recording or erasing of data, the system controller 21 rewrites the management information stored in the buffer RAM 33 each time a recording / erasing operation is performed, and a predetermined operation is performed in accordance with the rewriting operation. At this timing, the management information area of the disc 1 is also rewritten.

Reference numeral 34 denotes a communication circuit, which transmits / receives data to / from an external device via the connector section 15. A display controller 35 serves as a control circuit for causing the display unit 13 to execute display data from the system controller 21, that is, display of a search menu, display of data read from the disk 1, and the like. With the above configuration, the recording / reproducing apparatus 10 can perform the recording operation and the reproducing operation of various general data on the disc 1.

When reproducing audio data from the disc 1 and outputting it as an audio signal, the reproduction RF signal as the audio data read from the disc 1 is
After being subjected to EFM demodulation and decoding such as CIRC in the decoder unit 28, the system controller 21 once writes them in the buffer RAM 33. The optical head 2
Reading of data from the magneto-optical disk 1 by 3 and transfer of reproduced audio data from the optical head 23 to the buffer RAM 33 are performed at 1.41 Mbit / sec (intermittently).

The data written in the buffer RAM 33 is read at a timing at which the reproduction audio data is transferred at 0.3 Mbit / sec and is supplied to the audio compression decoder section 38. In this recording / reproducing system, audio signals are subjected to data compression processing at the digital data stage (for example, 2 channels 16 bits and sampling frequency 44.1 Kbit (≈ 1.
4 Mbit / sec) data is recorded by being compressed to about 1/5 of 0.3 Mbit / sec), and therefore, a decoding process, which is the reverse process to this compression process, is performed at the time of reproduction. When reproduction signal processing such as decoding processing for audio compression processing is performed in the decoder section 38, it is converted into an analog signal by the D / A converter 39,
A line is output from the terminal 16b via a predetermined amplifier circuit section or the cord 17, and reproduced and output. For example, it is output as L and R audio signals.

When the audio signal recording operation is performed on the disc 1, the recording signal (analog audio signal) supplied to the terminal 16a from the line input system by the code 17 or a microphone system (not shown) is A / A. D
After being converted into digital data having a sampling frequency of 44.1 Kbits and quantization of 16 bits by the converter 36, the digital data is supplied to the encoder unit 37 and subjected to the audio compression encoding processing described above. The recording data compressed by the encoder unit 34 is once written in the buffer RAM 33 by the system controller 21, read out at a predetermined timing, and sent to the encoder unit 30. Then, after being subjected to encoding processing such as CIRC encoding and EFM modulation in the encoder section 30, it is supplied to the magnetic head drive circuit 31.

The magnetic head drive circuit 31 supplies a magnetic head drive signal to the magnetic head 26 in accordance with the encoded audio data recorded, as in the case of data recording. That is, the magnetic head 26 applies the magnetic field of N or S to the disk (magneto-optical disk) 1. Further, at this time, the system controller 21 supplies a control signal to the optical head 23 so as to output a laser beam of a recording level.

Although the reproducing operation has been described assuming that the disk 1 is a magneto-optical disk, an optical disk on which data is recorded in a pit form like a CD (and also a magneto-optical disk like a P-TOC described later). The pit data) can be reproduced as a so-called mini disk reproducing device. In this case, the optical head 2
3 is not a magnetic Kerr effect, but a reproduction R according to a change in reflected light level depending on the presence or absence of a pit as in the case of a CD player.
The F signal is taken out. Of course, the magnetic field recording operation is not executed on the optical disc (and the pit data area of the magneto-optical disc).

Further, as described above, the buffer RAM 33
The TOC information on the disc 1 is read in,
The disc 1 to which the recording / reproducing apparatus of this embodiment corresponds is
Pre-mastered type (optical disc) type in which music and the like are recorded in advance, data rewritable type (magneto-optical disc) in which the user can record audio data and general data as described later, and data There is a hybrid type that has a ROM area where files and songs are recorded in advance, and a magneto-optical area where recording is possible. These discs have different types depending on the type.
Data for managing areas where music and the like are already recorded and unrecorded areas are recorded as TOC information.

When the audio data (song) is to be recorded as described above, the U-TOC is used.
(TO that can be rewritten according to recording and erasing of audio signals
The unrecorded area on the disc is searched from the C information area) and the audio data is recorded there. Also, when reproducing the audio data, the area in which the music to be reproduced is recorded is from the P-TOC when the music is a premastered music, or U-when the music is magneto-optically recorded. It is judged from the TOC, the area is accessed, and the reproducing operation is performed. On the other hand, for the operation of recording / reproducing general data, the information of the data U-TOC is used as the management information.
In the magneto-optical disk as well, the P-TOC is recorded in the ROM as pit data.

<2. P-TOC Format in Disc> Next, the P-TOC format in the disc 1 will be described. As the P-TOC information, a recordable area of the disc (recordable user area) and the like are designated, and the ROM area is managed. Also,
As an audio data application, in the case of a premastered disc or a hybrid disc, it is possible to manage music recorded in a ROM.

The format of the P-TOC is shown in FIG.
FIG. 3 shows P-recorded repeatedly in an area for P-TOC (for example, ROM area on the innermost side of the disc).
It shows one sector of TOC information.

The data area of the P-TOC sector is formed as a data area of 4 bytes × 587, for example, and shows a sync pattern consisting of 1-byte data of all 0s or all 1s at the head position, and a cluster address and a sector address. An address or the like is added by 4 bytes, and the above is used as a header to indicate that it is a P-TOC area.

Further, an identification ID by an ASCII code corresponding to the character "MINI" is added at a predetermined address position following the header. Furthermore, the disc type, recording level, song number of the first song recorded (First TNO), song number of the last song (Last TNO), lead-out start address RO _A , power cal area start address PC _A. , U-TOC (U of FIG. 4 described later)
-TOC sector 0 data area) start address UST _A , recordable area start address RST
_A, etc. are recorded, and subsequently, a corresponding table instruction data section having a table pointer (P-TNO1 to P-TNO255) that makes each recorded song etc. correspond to a parts table in the management table section described later is prepared. ing.

Then, in the area following the correspondence table instruction data portion, (01h) to (FF) are associated with the table pointers (P-TNO1 to P-TNO255) in the correspondence table instruction data portion.
Up to h), a management table section is prepared, which is provided with 255 parts tables (the numerical values with “h” below are so-called hexadecimal notation). In each parts table, a start address and an end address as a starting point for a certain segment (in this case, a segment means a track portion where data is physically continuously recorded on a disk track) , And the mode information (track mode) of the segment (track) can be recorded.

The mode information of the track in each parts table is information indicating whether or not the segment is set to, for example, overwrite inhibition or data copy inhibition,
Whether or not it is audio information, monaural / stereo type, etc. are recorded.

In each of the parts tables (01h) to (FFh) in the management table section, the contents of the segment are indicated by the table pointers (P-TNO1 to P-TNO255) in the corresponding table instruction data section. In other words, for the first piece of music, a certain parts table (for example, (01h) is used as the table pointer P-TNO1. However, the table pointer is actually a certain parts table at the byte position in the TOC sector 0 by a predetermined calculation process. Is recorded.) In this case, the start address of the parts table (01h) is the start address of the recording position of the first piece of music, and similarly the end address is the first piece of music. Will be the end address of the position where the song was recorded. Further, the track mode information becomes information about the first music piece.

Similarly, for the second music piece, the parts table indicated by the table pointer P-TNO2 (eg (02h))
The start address, end address, and track mode information of the recording position of the second tune are recorded in. Similarly, since the table pointers up to P-TNO255 are prepared, it is possible to manage up to the 255th song on the TOC. By forming the TOC sector 0 in this way, a predetermined music piece can be accessed and reproduced at the time of reproduction, for example.

As will be described later in the present embodiment, in the case of being used for data recording, or in the case of a recording / playback type disc which does not have a premastered music area even for music, the above correspondence table is used. Since the instruction data section and the management table section are not used, each byte is set to "00h".

<3. U-TOC Format on Disc> FIG. 4 shows a format of one sector of the U-TOC, which mainly records management information about music recorded by the user and an unrecorded area in which new music can be recorded. Data area. For example, when the disc 1 is used for music and a certain piece of music is to be recorded on this disc, it is possible to find an unrecorded area on the disc from this user TOC and record audio data there. It is made possible. Further, at the time of reproduction, the area in which the music to be reproduced is recorded is discriminated from the U-TOC information, and that area is accessed to perform the reproduction operation.

In the U-TOC sector shown in FIG. 4, P
Like the TOC, a header is provided first, and then, at a predetermined address position, a marker code, a model code, the song number of the first song (First TNO), and the song number of the last song (Last TN).
Data such as O), sector usage status, disk serial number, disk ID, etc. are recorded, and the area of the recorded music and the unrecorded area recorded by the user are made to correspond to the management table section described later. The table pointers (P-DFA, P-EMPTY, P-FRA, P-TNO1 ~
Area for recording P-TNO255) is prepared.

Then, 255 parts tables from (01h) to (FFh) are provided as management table parts to be associated with the table pointers (P-DFA to P-TNO255) of the corresponding table instruction data part. In the parts table of FIG. 3, a start address as a starting point, an end address as an ending point, and mode information (track mode) of the segment are recorded like the TOC sector 0 in FIG. -In the case of TOC sector 0, the segment indicated in each parts table may be connected to another segment in succession, so a link indicating the parts table in which the start address and end address of the connected segment are recorded. Information can be recorded.

In the case of a mini disk system for music,
For example, the data of one song is physically discontinuous, that is, even if it is recorded over multiple segments, the playback operation will not be hindered by playing back while accessing between segments. May be recorded in multiple segments for the purpose of efficient use of the recordable area. Therefore, link information is provided, for example, numbers (01h) to (FFh) given to each parts table (actually indicated by a numerical value which is a byte position in the U-TOC sector 0 by a predetermined calculation process). The parts tables can be connected by specifying the parts table to be connected. (Because songs that are recorded in advance are not usually segmented,
As shown in FIG. 3, all the link information in the TOC sector 0 is “(00h)”. )

That is, in the management table section of the U-TOC sector 0, one part table represents one segment, and for example, a music piece formed by connecting three segments is linked by link information. The segment position is managed by the three parts tables.

Each of the parts tables (01h) to (FFh) in the management table section of the U-TOC sector 0 has a table pointer (P-DF) in the corresponding table instruction data section.
A, P-EMPTY, P-FRA, P-TNO1 to P-TNO255)
The contents of that segment are shown below.

The table pointer P-DFA is shown for a defective area on the magneto-optical disk 1, and a track portion (= segment) which becomes a defective area due to a scratch or the like is shown.
One part table or the first part table in multiple part tables is specified. In other words, if there is a defective segment in the table pointer P-DFA
Any one of (01h) to (FFh) is recorded, and the defective segment is indicated by the start and end addresses in the parts table corresponding thereto. Further, when there is another defective segment, another part table is designated as the link information in the part table, and the defective segment is also shown in the part table. Then, if there is no other defective segment, the link information is, for example, "(00h)", and thereafter there is no link.

The table pointer P-EMPTY indicates the top part table of one or a plurality of unused part tables in the management table section. If an unused part table exists, the table pointer P-EMPTY is used as a table pointer P-EMPTY. , (01h) to (FFh) is recorded.
If there are multiple unused part tables, the part tables specified by the table pointer P-EMPTY are used to sequentially specify the part tables by link information, and all the unused part tables are linked on the management table section. To be done.

For example, in the case of a magneto-optical disk in which audio data such as music is not recorded and there is no defect, the parts table is not used at all, so that the parts table (01h) is read by the table pointer P-EMPTY. The part table (02h) is specified as the link information of the part table (01h), and the part table (0
The parts table (03) is specified as the link information of 2h), and the parts table (FFh) is linked in this way. In this case, the link information of the parts table (FFh) is set to "(00h)" indicating that there is no connection thereafter.

The table pointer P-FRA indicates a writable unrecorded area (including an erased area) on the magneto-optical disk 1, and a track portion (= segment) to be an unrecorded area is indicated. The top parts table in one or more parts tables is specified. That is, if there is an unrecorded area, the table pointer P-FR
Any one of (01h) to (FFh) is recorded in A, and a segment which is an unrecorded area is indicated by the start and end addresses in the parts table corresponding to that. Further, when there are a plurality of such segments, that is, when there are a plurality of parts tables, the parts table with link information of "(00h)" is sequentially specified by the link information.

FIG. 5 schematically shows the management state of the segment to be the unrecorded area by using the parts table. This is because when the segments (03h) (18h) (1Fh) (2Bh) (E3h) are unrecorded areas, this state corresponds to the corresponding table instruction data P-FR.
Continuing from A, the parts table (03h) (18h) (1Fh) (2Bh) (E3
The state represented by the link of h) is shown. The defective area and the unused parts table management mode described above are the same.

The table pointers P-TNO1 to P-TNO255 indicate music pieces recorded by the user on the magneto-optical disk 1. For example, in the table pointer P-TNO1, one or a plurality of data pieces in which the data of the first music piece are recorded. A parts table indicating the temporally first segment of the segments is specified.

For example, the first music piece is not divided into tracks on the disc (that is, one segment).
When recorded, the recording area of the first music piece is recorded as the start and end addresses in the parts table indicated by the table pointer P-TNO1.

Further, for example, when the second music piece is discretely recorded in a plurality of segments on the disc, each segment is designated in a temporal order in order to indicate the recording position of the music piece. In other words, from the parts table specified by the table pointer P-TNO2, further parts tables are sequentially specified by the link information according to the temporal order, and the parts table whose link information is "(00h)" is linked. (The above-mentioned form similar to FIG. 5). Thus, for example, all the segments in which the data constituting the second music is recorded are sequentially designated and recorded, so that the data of the U-TOC sector 0 is used to reproduce the second music or the second music. When overwriting the area (1), it becomes possible to access the optical head 3 and the magnetic head 6 to take out continuous music information from discrete segments, and to perform recording using the recording area efficiently.

Further, in this embodiment, the disk 1 may be used for data recording (or may be used for both data and dedicated) as will be described later.
In the -TOC, the general data area used for data use is also managed in the same manner as in the case of music, with the entire area of the disk used as the general data area as a unit.

For example, when four songs are recorded and a predetermined area is set as a general data area, each song is a table pointer as a U-TOC.
The general data area is managed by the P-TNO1 to P-TNO4, and the general data area is managed by the table pointer P-TNO5, for example.

That is, for example, a parts table guided by the table pointer P-TNO5 (and, when a plurality of general data areas are discretely formed on the disk, the parts table linked from the parts table by link information). ) Indicates a start address and an end address as a general data area. In this case, it is identified by the data in the track mode that the start address and the end address are not the area in which the music is recorded but the general data area.

The track mode as the mode information is (0
1h) ~ (but are provided one byte (8 bits of d ₁ to d ₈₎ in each part table of up to FFh),
Each bit indicates various mode states as follows. For example, bit d ₁ indicates whether the segment is recordable / non-recordable, bit d ₂ indicates whether the segment is copy-write protected, bit d ₃ indicates whether the segment is copy recorded after the original / 2 generation, d ₄ indicates whether the segment is audio data or general data, bits d ₅ and d ₆ indicate whether the segment is normal audio, bit d ₇ indicates whether the segment is monaural audio data or stereo audio data, and bit d ₈ indicates that segment. A mode is indicated for each emphasis processing of the data of the segment.

Therefore, when the segment is managed as the general data area, the bit d ₄ of this track mode is set to, for example, “1” (bit d ₄ = “0” in the case of audio data) in the corresponding parts table. Then, it will be identified as a general data area.

When the general data is recorded as ROM in the disc as the premastered pits, it is managed in the P-TOC in the same manner as in the case of the premastered music. In this case also, the parts table is used. bit d ₄ of the track mode is "1", as distinguished from the pre-mastered music.

<4. Area Structure in Disc> Here, the area structure in the disc 1 will be described, and the positional relationship and management mode of the above-described P-TOC and U-TOC will be described.

In the case of a magneto-optical disk, it is roughly divided into FIG.
As shown as a pit area, it is divided into an area in which data is recorded by embossed pits (a premastered area) and a groove area in which a groove is provided as a so-called magneto-optical area. Here, the premastered area is a reproduction-only management area in which the above-mentioned P-TOC is recorded, and the P-TOC sector is repeatedly recorded.

The minimum recording / reproducing operation unit for the recording track on the disc 1 is a cluster, that is, the recording operation or the reproducing operation is always executed with one cluster as a minimum unit. One cluster is composed of 36 sectors as shown in FIG. However,
Four of these sectors are sub-data areas used as sub-data and linking areas.
Recording of data, audio data, or audio data or general data realized in this embodiment is performed in the main data area of 32 sectors.

Although not shown, the sector is further subdivided, and the area for 2 sectors is divided into 11 areas called sound groups. In the case of audio data (songs), there is no limitation on which start address managed by the U-TOC is in this sound group, but general data for recording a data file of general data described later. In the case of an area, the start address managed by the U-TOC parts table as described above is the sound group address "0.
It is fixed to 0h ”and the end address is fixed to the sound group address“ 1Ah ”, which prevents audio data and general data from being mixed in the cluster.

The P-TOC and U-TOC have 3 bytes (24
The upper 16 bits of the address data indicated by (bit)
The bits are the cluster address, the following 6 bits are the sector address, and the lower 4 bits are the sound group address. These 4 bits are "00h" or "1Ah".

As shown in FIG. 6, a groove area is formed, for example, from cluster address "0000h" to "0BFFh", following the premastered area on the innermost side of the disk 1. Of these, the cluster address "0"
000h ”to the address indicated as the lead-out start address RO _A in the P-TOC is a recordable recordable area.

Further, among the recordable areas, the recordable user area in which data is actually recorded is located at the position indicated as the recordable user area start address RST _A in the P-TOC (for example, the cluster address “0032h”). To the lead-out start address RO _A. In this case, from the cluster address "0000h" to the recordable user area start address RST _A (cluster address "00
32h '') is a recording / reproducing management area and is an area in which the above-mentioned U-TOC and the like are recorded. One cluster from the position shown as the power cal area start address PC _A in the recording / reproducing management area is provided as a laser power calibration area.

The U-TOC is the cluster address "0000".
In the recording / reproducing management area of "h" to "0032h", three clusters are continuously recorded at a required position.
Which cluster address U-TOC is recorded in is P
-U-TOC start address UST _{A in} TOC
Shown in.

As described above, the area management on the disk is P
-TOC, and when audio data is recorded in the recordable user area, the recordable user area is managed by the U-TOC in the form described above.

Further, in this embodiment, since data other than audio data is recorded / reproduced in the recordable user area, the data U-TOC described later is provided as information for managing this. This data U-TOC Is the cluster address “0000h” to “00
32h ”at the required position in the recording / playback management area.
The clusters are continuously recorded, and the head position thereof is, for example, a cluster offset by "10h" from the head position of the U-TOC indicated by the U-TOC start address UST _A in the P-TOC. It is set as an address. Alternatively, if the start position of the U-TOC is an address position behind “0020h” and “1
If three clusters are recorded from the position offset by “0h” and the cluster extends beyond “0032h” (that is, the recordable user area), recording is performed from the cluster address position offset by, for example, “-10h” from the start position of the U-TOC. Will be done. In any case, the data U-TOC is also recorded in the recording / reproducing management area, and this data U-TOC manages the groove area for data recording / reproducing.

Then, the data U in the recording / reproduction management area
-The TOC start address is not directly indicated in the P-TOC, but only "10h" or "-10h" is the cluster address from the U-TOC start position address indicated in the U-TOC start address UST _A in the P-TOC. Is obtained by adding.

Of course, when recording / reproducing data, the area used for actual data is the recordable user area. Hereinafter, the data area and the data UT for data recording / reproducing use, which is a feature of the present embodiment,
The format of OC will be explained.

<5. Data Sector Format> The structure of the data sector provided in the recordable area for use in recording / reproducing general data is shown in FIG.
This will be described with reference to FIG. The minimum recording / reproducing operation unit (that is, the input unit of the encoder 30 in FIG. 2 or the decoder 2
8 is also an output unit) is one cluster as described above, and one cluster has 32 main data areas.
Although there is a sector, what is shown is the sector structure.

FIG. 8 generally shows the format of the data sector used in this embodiment (data U-
(Including sectors in TOC). One sector is 4 × 587 bytes in total, and the first 12 bytes of the sector is a synchronization pattern. For example, a CD-ROM.
The synchronization pattern of is adopted.

The subsequent 16 bytes are provided as a header. As the header, first, the cluster address is recorded in 2 bytes (Cluster H, Cluster L), and then the sector address is recorded in 1 byte (sector). Further, the mode information specified by the CD-ROM is recorded as the mode information in the subsequent 1 byte. Furthermore, in the next 4 bytes, the address area for the application side (Logical
Sector 0 to Logical Sector 3) are provided.

Next, information indicating the error correction mode (Mod
e), the category information (Cat
egory), and index information (Index) indicating parameters of the data file is provided. A specific example of the index information is determined by the category information and the application (described later), but when the index information is “00h”, it indicates that the data recording content (that is, the volume) is zero. . The information (Mode) indicating the error correction mode and the category information (Category) indicating the attribute of the data file will be described later. The system ID is added to the last 4 bytes of the header.

Following such a 16-byte header, 2
A 048 byte data area is prepared. The 276 bytes after the data area are regarded as an additional area (Aux
0-Aux 275).

As described above, the header has information (Mode) indicating the error correction mode at the 9th byte, and there are three possible error correction modes, mode 0, mode 1, and mode 2, for example. Information for identifying the mode is shown as information (Mode). The format of the data sector in each mode will be described in order.

The format of the data sector in mode 0 is shown in FIG. As information indicating the error correction mode, the ninth byte of the header ((Mode) of the first byte on the fifth line in the figure) is set to "00000000", that is, "00h". In this mode 0, no area for adding data for error detection and correction is provided. In other words, the additional area (Aux 0 to Aux 275) after the 4 × 519th byte remains undefined.

When the format of the data sector is configured as described above, the reproduction information from this disc is only subjected to error detection and correction processing by the CIRC code in the decoder 28 shown in FIG. 2 in the recording / reproducing apparatus. However, as well known, the CIRC code has a practically sufficient error correction capability, and no particular problem occurs in error processing.

The format of the data sector in mode 1 is shown in FIG. The 9th byte (Mode) of the header as information indicating the error correction mode is set to "00000001", that is, "01h" as illustrated. In this mode 1, 4 bytes of error detection parity is added as error detection and correction data. That is, parity (ECD0 to ECD3) is added to 4 bytes following the 2048-byte data area. As a result, the undefined additional area is 2 of (Aux 0 to Aux 271).
It will be 72 bytes. This parity P _(X) (that is, ECD
The generator polynomial for 0 to ECD3) is: P _(X) = (x ¹⁶ + x ¹⁵ + x ² +1) (x ¹⁶ + x ² + x +
1) is.

When the format of the data sector is configured as described above, regarding the reproduction information from this disc, the recording / reproducing apparatus does not use the error detection result from the decoder 28 shown in FIG. The error can be detected only by the digital signal output of.

The format of the data sector in mode 2 is shown in FIG. The 9th byte (Mode) of the header as information indicating the error correction mode is set to "00000010", that is, "02h" as illustrated. In this mode 2, data for error detection and correction is used for all the additional areas. That is 20
P parity (P-parity0 to P-parity171) is added to 172 bytes following the 48-byte data area, and Q parity (Q-parity0 to Q-parity) is added to the following 104 bytes.
103) is added. As a result, an error correction capability of up to 80 bytes is realized. The P-parity and Q-parity are distances (26, 26) from the Galois Field (2 ⁸ ) used in so-called CD-ROM.
It has the same structure as the Reed Solomon code of 24).

In these modes 0 to 2,
Regardless of the mode, the byte position in the sector of the data area is fixed to the 29th byte to the 2048th byte (7th line to 518th line in the figure) as a sector, so it corresponds to the mode 0 format. Even the recording / reproducing apparatus described above can perform the reproducing operation on the disc in which the mode 1 or the mode 2 is adopted without any trouble. That is, by adopting the above-mentioned mode format, the disc has backward compatibility with the recording / reproducing apparatus.

Next, the definition of the category information provided in the 10th byte of the header will be described. ... When category information (Category) = "00h". Indicates that this sector is an open sector with no data recorded, regardless of the state of the data area. Therefore, when erasing the contents of the sector, this category information (Category) may be rewritten to "00h".

... Category information (Category) = "0
1h ”. Indicates that binary data is recorded in this sector. There are no restrictions on the type of data. In such a sector, the bytes recorded in the data area are used as they are as digital data to be passed to the application (software) side. When the category information is "01h", the following index information indicates that the data area is secured by the size of the value recorded in the byte as (Index) x 128 bytes. Become. Since the data area is 2048 bytes, the index information (In
dex) takes any value from "00h" to "10h".

・ ・ ・ Category =
For "10h" to "1Fh". Indicates that document (document) data is recorded in this sector. In this case as well, the subsequent index information similarly indicates that the data area is secured by the size of the numerical value recorded in the byte as (Index) × 128 bytes.

... Category information (Category) =
In the case of "20h" to "2Fh". This shows that a single dot image, that is, one image file is recorded as monochrome dot data in this sector. In this case as well, the subsequent index information similarly indicates that the data area is secured by the size of the numerical value recorded in the byte as (Index) × 128 bytes.

... Category information (Category) =
In the case of "30h" to "3Fh". In this sector, multiple dot images, that is, a plurality of image files are recorded as monochrome dot data. In this case as well, the subsequent index information similarly indicates that the data area is secured by the size of the numerical value recorded in the byte as (Index) × 128 bytes.

[Category] =
For "E0h" to "E2h". Indicates that this sector is used as an allocation table. In the case of this embodiment, the sector corresponds to a cluster allocation table (CAT) described later. The cluster allocation table (CA
T) specific data format (ie 20
The format that defines the usage pattern of the 48-byte data area will be described later. In this case, as the subsequent index information, (Index) = “00h” is not used, (Index)
When it is "00h", it means to use.

... Category information (Category) =
For "F0h" and "F1h". This sector is used as a directory. A specific data format as a sector used as a directory in this embodiment (that is, a format that defines the usage form of a 2048-byte data area) will be described later.

In this case, the subsequent index information indicates the number of directories in which the numerical value shown as (Index) is recorded. As will be described later, 64 units of directories can be configured in a sector, so that the index information (Index) indicates any value from 0 to 64.

... Category information (Category) =
In the case of "FEh" and "FFh". This sector indicates that it is a sector (hereinafter referred to as a heading sector) in which reference information (reference file) by a document or dot image formed by extracting a part of the data file is recorded. A specific data format as a sector used as a heading sector in this embodiment (that is, a format that defines the usage pattern of a 2048-byte data area)
Will be described later.

In this case, the subsequent index information indicates the number of reference files (heading parts) in which the numerical value shown as (Index) is recorded. As will be described later, the heading parts are 32 units in the case of a document in one sector (32 units can be recorded in a 2048-byte data area if one unit is 64 bytes), and 4 units (1 unit in the case of a dot image).
If the unit is 512 bytes, 4 in the data area as well.
Since the unit can be recorded, the index information (In
dex) indicates a numerical value of 0 to 32 or 0 to 4.

<6. Data File Management Method by Data U-TOC> Hereinafter, a data file management method at the time of recording / reproducing with respect to the disc having the above format will be described. The format of the management information is shown below. -A- Cluster configuration of data U-TOC-b- CAT (cluster allocation table) sector-c- Directory sector-d- Heading sector

-A- Cluster configuration of data U-TOC When the disk 1 is inserted into the recording / reproducing apparatus 10, the recording / reproducing apparatus 10 first reads the P-TOC and holds it in the buffer RAM 33, as described above. And that P-
Of TOC information, U-TOC start address US
Confirm the recording position of U-TOC with reference to T _A. As described above, the data U-TOC has a cluster address of "10" from the U-TOC start address UST _A.
Since it is recorded at a position offset by “h” or “−10h” (see FIG. 6), the position is accessed to capture the data U-TOC. If the data U-TOC does not exist at that position, the disc is determined to be a virgin disc on which no data is recorded, and the data U-TOC is initialized. When the data U-TOC is fetched (or when the initial management information is generated and fetched), the management information is used to manage the area in which actual data recording / reproduction is performed and the data search is performed. Will be done.

By the way, when the disc 1 is dedicated to data recording (that is, when it is not necessary to manage the general data area by the U-TOC), the U-TOC (that is, audio data management information) actually exists. You don't have to. The address to be recorded in the U-TOC is P
-Start address U of U-TOC which is information of TOC
It is managed as ST _A , and the position of the data U-TOC is calculated from the start address UST _A of this U-TOC. Therefore, the data U-TOC is generated at a predetermined position regardless of the presence of the U-TOC, and The data U-TOC can be read and used as management information.

A cluster of data U-TOC configured so as to be able to manage recording / reproduction of data will be described. The data U-TOC has a size of one cluster, and the above-mentioned U-
The data is to be triple-written over three clusters at a position offset by "10h" or "-10h" from the TOC start address UST _A.

Then, in the data U-TOC, a cluster allocation table (hereinafter referred to as a cluster allocation table) showing information on the combined state of all clusters (clusters from "0000h" to "0BFFh" in FIG. 6) for the recordable area for recording / reproducing data. , CAT), a data file name, etc. are stored, and the address position at the beginning of the data file (in the case of a directory indicating a lower layer and the directory indicating it, the address position of the lower layer directory), etc. And a sector having a heading part as reference information.

The structure of 32 sectors (1 cluster) of the data U-TOC is shown in FIG. First, the first three sectors (sector 00 to sector 02) are CAT (CAT0 to CAT0).
CAT2). Subsequent sector 03 is allocated for the root directory, starting with sector 04 ...
"Reserved" in 28 sectors up to sector 1F
Is prepared so that it can be used for directory expansion and as a heading sector described later.

-B-CAT (Cluster Allocation Table) Sector The format of CAT0 assigned to sector 00 is shown in FIG. In the case of the sector used as CAT, the system ID (ID0 to ID in FIG. 8) assigned to the last 4 bytes in the 16-byte header is used.
In 3), the character "MINX" is recorded by the ASCII code as shown in FIG. This "MIN
X ”is data U whose sector is not for audio
-It indicates that it is used as a TOC.
Therefore, when the data U-TOC is initialized or rewritten, the recording / reproducing apparatus 10 uses this "MIN".
X ”will be recorded as a system ID in each sector of the data U-TOC. Thereby, it is distinguished from "MINI" which is the identification ID of the P-TOC.

When reading the data U-TOC, the system ID "MINX" is referred to,
Whether or not the sector is the sector as the data U-TOC is determined, and if it is confirmed that the sector is the data U-TOC, the information of the sector is used as the management information.

The format of FIG. 13 is CAT (C
Since the category information of the 10th byte in the header is "11100000", that is, "E0h", this sector is CAT (CAT0).
Will be shown.

C is in the 2048 bytes which is the data area.
Data as an AT unit is recorded. CAT
For all clusters in the recordable area (Fig. 6
From "0000h" to "0BFFh")
The binding state data for
First, in CAT0, information on the 0th to 1023th clusters is allocated and 1024 CATs are allocated.
The unit is recorded.

Among the clusters in the recordable area, the clusters that cannot be handled by 1024 CAT units of CAT0 will be described later in CAT1, C.
It will be managed by AT2. 3 sector C
Since the AT can manage “C00h” (that is, 3072) clusters, the three-sector CAT can cover all clusters from “0000h” to “0BFFh”.

As the CAT unit, 2 bytes are allocated to one cluster, and for example, the 0th cluster is represented by (CAT000-H) and (CAT000-L). Similarly, for example, information about the fourth cluster is (CAT004
-H) and (CAT004-L).

The structure of each CAT unit is shown in FIG. The 2-byte CAT unit is made into words W0 to W3 of 4 bits each. The word W0 indicates the classification of the cluster, and the words W1 to W3 indicate the cluster number to be accessed when the data file continues to a cluster other than continuous clusters.
It is used only when indicating the length of continuous free clusters, or when indicating the combined information in the case of the first cluster of the data file.

The definition in word W0 is shown in FIG.
When the word W0 = “Fh”, it indicates that the cluster is a recordable free cluster. In this case, the lengths of consecutive free clusters are indicated in the words W1 to W3. The word W0 = “Eh” indicates that the cluster is a cluster that is the end of file data. The word W0 = “Dh” indicates that the cluster is a cluster that is continuous to the next cluster in a certain file data. Word W0 = "C
“H” indicates that the cluster is the first cluster of the file data having the cluster. Word W0 = "Bh"
From that cluster, it is indicated that the cluster indicated by the words W1 to W3 should be followed.

The word W0 = “6h” to “1h” indicates that the cluster is a record-inhibited cluster, “6h” is the cluster at the end of the data file, and “5h” is the next cluster. Continuous clusters,
"4h" is the first cluster of the data file, "3h"
Indicates that the cluster should jump to the cluster of the address indicated by the words W1 to W3.

When the word W0 = "0h", it means that the cluster is a cluster for which recording and reproduction are prohibited.

The word W0 = “Ch” or “4h”
If the word W1, W2, W3 is "000h" when it is the first cluster of the data file, it indicates that the data file is continuous to the next cluster, and the words W1, W2, W3 are "FFFh". ], It means that the data file ends only in the first cluster, which is the first cluster, and the words W1, W2, W
If 3 is not "000h" or "FFFh", the data file is word W1 from the first cluster.
This indicates that the clusters indicated by W2 and W3 are continuous.

With the CAT unit thus constructed, when one data file is formed of, for example, four clusters as the CAT, in each CAT unit corresponding to the four clusters, "W0, W1, W
2, W3 ”is“ C000h ”,“ D *** h ”, and“ D ** ”
* H ”and“ E *** h ”(*, that is, W1, W2
W3 is not specified). For example, if the 0th to 3rd clusters are composed of data files in this way, (CAT000
-H, CAT000-L) CAT unit, (CAT003-H, CA
T003-L) CAT unit with "C000h""D***"
It will be recorded as "h", "D *** h", and "E *** h".

Although the CAT is constructed in the above management form, since the recording tracks are formed in a spiral shape on the disk 1, it is considered that the data files are often recorded in continuous clusters. To be Therefore, the above CAT form is often word W1.
For W3, there is no need for calculation, and the cluster connection state can be grasped very efficiently.

The format of the CAT1 recorded in the sector 01 of the data U-TOC is shown in FIG. 14, and also in this sector, the system ID assigned to the last 4 bytes in the 16-byte header is "MINX". Is recorded by an ASCII code.
Further, the category information of the 10th byte in the header is "11100001", that is, "E1h", which indicates that this sector is CAT (CAT1).

C is in the 2048 bytes which is the data area.
Similar to AT0, data as 1024 CAT units are recorded. Here, the 1024th to the 20th
Information about 47 clusters is assigned. CA
T unit (CAT1024-H, CAT1024-L) ~ (CAT2014-H
, CAT2047-L) and the structure of the CAT unit is as shown in FIGS.

The format of CAT2 recorded in sector 02 of data U-TOC is shown in FIG. 15, and in this sector, the system ID assigned to the last 4 bytes in the 16-byte header is "MINX". Is recorded by an ASCII code.
Also, the category information of the 10th byte in the header is “1111000”, that is, “E2h”, which indicates that this sector is CAT (CAT2).

C is in the 2048 bytes which is the data area.
Similar to AT0 and CAT1, data of 1024 CAT units is recorded. Here 2048
To 3071 clusters are assigned information. CAT unit (CAT2048-H, CAT2048-L) ~
The structure of the CAT unit up to (CAT3071-H, CAT3071-L) is as shown in FIG. 16 and FIG.

The above CAT0, CAT1 and CAT2 sectors manage the combined state of all clusters in the recordable area.

-C- The sector (or sector 04 to sector 04-) formed as the root directory in the sector 03 of the direct sector data U-TOC.
(Sector formed as a directory on 1F)
The format of is shown in FIG.

In the case of a sector used as a directory, the system ID (ID0 to ID in FIG. 8) assigned to the last 4 bytes in the 16-byte header is used.
As 3), as in the case of CAT, "MINX" is recorded by an ASCII code as shown in FIG. This "MINX" indicates that the sector is used as data U-TOC. Therefore, when the data U-TOC is initialized or rewritten, the recording / reproducing apparatus 10 records this "MINX" as a system ID also in the sector as a directory. Then, in the recording / reproducing apparatus 10, as in the case of CAT, the directory sector is also processed by the "M".
INX ”is referred to to determine whether or not the sector is a sector as the data U-TOC, and when it is confirmed that the sector is the data U-TOC, the information of the sector is set as management information. Will be used as.

Since the format of FIG. 18 indicates a directory, the category information of the 10th byte in the header is "1111000 *", that is, "F
0h ”or“ F1h ”indicates that this sector is a directory.

Data as a directory unit is recorded in 2048 bytes serving as a data area.
The directory unit (that is, one directory) is provided corresponding to a certain data file,
It consists of 32 bytes. Although FIG. 18 shows only one directory unit consisting of 32 bytes,
In the 048-byte data area, 64 directory units of 32 bytes can be similarly recorded.

The name of the data file is recorded in the first 8 bytes (Name0 to Name7) of the directory unit. Also, the following 3 bytes (Suffix0 to Suffix2)
Is assigned so that the extension is recorded. For example, when searching for a data file recorded in the recordable user area, the name and extension of this directory unit are used.

Category information is contained in 1 byte following the extension.
(Category) is arranged. Category information (Categor
y) indicates the attribute of the corresponding data file of this directory unit, which is the same as the category information described in the format of the data sector described above.

The following 2-byte volume information (Volume1-
0, Volume1-1) represents the number of clusters used by the data file indicated by this directory. That is, it indicates how many clusters are required to access the data file.

[0135] The volume information (Vo
lume2-0, Volume2-1) represents the memory capacity of the host device required to receive and use the data file indicated by this directory. This volume information (Vo
lume1-0, Volume1-1) or (Volume2-0, Volume2-1
) Is "00h" when it is not defined (that is, when it is left to the application side).

The following 2-byte index information (Index
0, Index1) is used when a heading sector as reference information of the data file exists in the same cluster as this directory sector, and the sector number of the heading sector is recorded as index information (Index0). , Index information (In
The part number (described later) within the sector of the heading sector is recorded as dex1). If there is no heading sector, index information (Inde
x0) = “00h”.

Further, the date and time when the data file corresponding to the directory was last updated is recorded in the subsequent 5 bytes after 1 byte. That is, the year, month, day, hour, and minute information are (Year), (Month), (Day), and (Hou), respectively.
r), recorded in the byte as (Minutes).

Then, the address of the corresponding data file is recorded. That is, the cluster address is indicated by 2 bytes of (Cluster-H) and (Cluster-L), and the sector address is indicated by 1 byte of (Sector). A directory unit is formed with the above configuration, and functions as search information for each data file.

If the 12th byte category information (Category) in this directory unit is "F0h" or "F1h" indicating a directory, the sector indicated by that directory unit is the directory one level below. Becomes That is, it is used when hierarchizing directories. In this case, mixing with other directories is prohibited.

When the file structure is hierarchized, a directory unit in which the 12th byte category information (Category) of the directory unit indicates a directory is provided in the root directory of sector 03 of the data U-TOC. A lower directory unit will be created at the address indicated by the directory unit. Of course, the same applies when creating a lower directory unit.

In this case, in this embodiment, the lower directory units can be provided in the sectors 04 to 1F shown in FIG. When the directories are hierarchized, it is necessary to repeatedly access the directory and follow its chain when searching for data in conventional information equipment, and finally reach the data file. In the case of the example, the directories are all concentrated in the data U-TOC, that is, in one cluster. As described above, since the minimum unit of recording / reproducing operation is a cluster, as long as all directory units chained in a hierarchical structure are present in one cluster, access operation between directories becomes unnecessary, Access to data files 1
Only one time is required. Therefore, the efficiency and speed of the search operation can be significantly improved.

If all sectors of the data U-TOC cluster are used, a maximum of 28 directory sectors can be configured, and 64 sector directory units can be formed for each sector. A maximum of 1729 directory units can be formed, and it is possible to deal with a fairly large scale hierarchy. If a directory larger than that is required, a new cluster for the lower layer is provided at an arbitrary location in the recordable user area (where 3 clusters can be recorded continuously) for recording data, and the directory is created. It may be formed.

FIG. 19 shows a conceptual diagram of the directory hierarchical structure. Each block in FIG. 19 indicates a directory unit, a block indicated by the name of “DIR *” is a hierarchical directory unit, and a unit indicated by the name of “File *” is a directory unit corresponding to an actual data file. Is shown.

In the hierarchically-structured directory unit of "DIR *", the sector address indicating the directory unit of the lower layer is recorded (solid arrow). On the other hand, "Fil" is the bottom layer and shows the actual data file.
The cluster address of the data file is recorded in the directory unit of "e *" (dotted line arrow). It is assumed that these directory units are recorded in the sectors 03 to 08 in the data U-TOC as shown on the left side of the drawing.

The data file name is now "FileE".
In consideration of accessing the data file recorded in the cluster 500, the directory unit “DIR0” recorded in the sector 03 as the root directory to “DIR1” → “DIR3” → “DI
The cluster address of the data file is searched by the directory unit “FileE” through the path of the chained directory unit such as “R4” → “FileE”, and the data file access in the cluster 500 is executed. That is, although it is desired to follow the sectors 03 to 07, since the sectors 03 to 07 exist in the same cluster, data retrieval / execution can be actually performed by only one access to 500 clusters. It will be possible.

-B- Heading Desector Next, the heading sector will be described. Data-T that can be formed as a directory sector as described above
The sector in OC can also be used as a heading sector. A format when the sector is used as a heading sector is shown in FIGS. Note that FIG. 20 shows a heading sector in which reference information by characters is formed, and FIG. 21 shows a heading sector in which reference information by dot data is formed.

First, the case where the reference information in characters of FIG. 20 is provided as a heading sector will be described. When a certain sector in the data U-TOC is used as a heading sector, the system ID (ID0 to ID3 in FIG. 8) assigned to the last 4 bytes in the 16-byte header is CAT and directory. As in the case, "MINX" is recorded by the ASCII code. This "MINX" indicates that the sector is used as data U-TOC. Therefore, when the heading sector is formed in the data U-TOC, the recording / reproducing apparatus 10 sets this "MI".
NX ”will be recorded in the heading sector as a system ID.

Then, in the recording / reproducing apparatus 10, as in the case of the CAT and the directory, the heading sector is also referred to by the system ID "MINX",
Whether or not the sector is the sector as the data U-TOC is determined, and if it is confirmed that the sector is the data U-TOC, the information of the sector is used as the management information.

Further, in order to indicate that this sector is a heading sector (heading sector of character data), the category information of the 10th byte in the header is "11111111", that is, "FFh".

Data as a heading part which is reference information corresponding to a predetermined data file is recorded in 2048 bytes which is a data area. The heading part (that is, one piece of reference information) is provided corresponding to a certain data file, for example, by extracting the first letter of the data file, and is composed of 64 bytes. Of course, the heading part is not limited to the initial letter, but may be a character portion designated by the user or a character portion designated by a program on the application side.

Although FIG. 20 shows only one heading part recorded as (Hd-Data0) to (Hd-Data63), a heading part of 32 units similarly composed of 64 bytes is included in the data area of 2048 bytes. Can be recorded. A maximum of 32 units of heading parts per sector is given a part number. And
As described above, each heading part has index information (Index0, Index) in a certain directory unit.
Since the sector number and the part number are recorded in 1), they are chained to a specific directory unit (that is, a specific data file).

Next, a case where the reference information by the dot data of FIG. 21 is provided as a heading sector will be described. When a certain sector in the data U-TOC is used as a heading sector in which reference information by dot data is recorded as in the case of characters, as a system ID assigned to the last 4 bytes in a 16-byte header. As in the case of CAT and directory, "MINX" is recorded by ASCII code.

Further, in order to indicate that this sector is a heading sector (heading sector of dot data), the category information of the 10th byte in the header is "11111110", that is, "FEh".

Data as a heading part which is reference information corresponding to a predetermined data file is recorded in 2048 bytes which is a data area. In this case, the heading part corresponds to a certain data file, for example, a part of the data file is extracted and generated, or a related pattern is arranged (so-called icon), and is composed of 512 bytes. It In this case, of course, various data parts can be considered when the dot data is extracted from the data file.

Then, in FIG. 21, (Hd-Data0) to (Hd-Data)
Although only one heading part to be recorded as 511) is shown, 4 units of heading parts of 512 bytes can be similarly recorded in the 2048-byte data area. A part number is attached to each heading part with a maximum of 4 units per sector. Then, each heading part has index information (Index0, Index0,
It is chained to a specific directory unit (that is, a specific data file) by recording the sector number and part number in Index1).

The reference information as the heading parts is used as a parameter other than the file name when the data file is searched, for example, to facilitate the user's file selection operation and to realize the versatility of the program search. is there.

For example, when the data file has character information, it can be used as a keyword search. In particular, when searching for a data file having a specific keyword from data files shown in a plurality of directories, the file name is often not sufficient, but in such a case, each directory unit By referring to the information of the chained heading parts, it is possible to sufficiently perform the keyword search.

Further, in the present embodiment, since such a heading sector is provided in the same cluster as the directory, no extra access operation is required even when performing a keyword search, and a quick keyword search is realized. Further, as an aid to the user, the beginning of the file, the icon, and the figure in the file are held as a heading part to assist the user in identifying the contents of each file.

As described above, the data U-TOC including the CAT sector, the directory sector, and the heading sector realizes the data management function when recording / reproducing general data. That is, input / output (and record / record) the document data file and its file name.
It is realized as a recording medium for an information device capable of reproducing and communicating these. Also, for image information (dot data) digitized by, for example, an image scanner and arranged according to a predetermined rule, input / output (and recording / reproduction) of a data file and recording on an information device capable of communication are similarly performed. Approved as a medium.
Of course, these data management are completely independent from the audio data management.

<7. Management by data U-TOC and U-
Management Relationship by TOC> The management relationship by the above data U-TOC and U-TOC will be described with reference to FIG. Here, in FIG. 22, 1
The management form for one disk is shown divided into two stages (a) and (b). The upper part (a) shows the management state by the data U-TOC, and the lower part (b) shows U. -The management state by TOC is shown. The lower part (b) also shows the P-TOC region.

Now, it is assumed that three music pieces (M _{1 to} M ₃ ) are recorded as audio data on the disc 1 and four data files (DF _{1 to} DF ₄ ) are recorded as general data. Furthermore, it is assumed that a predetermined area is set as an empty area EA that can be used for recording general data.

As described above, the U-TOC manages the audio data in the recordable user area from the recordable user area start address RST _A to the lead-out start address RO _A , and manages the range of the general data area among them. It is supposed to do. On the other hand, the data U-TOC manages data files and the like in the groove area (from cluster "0000h" to cluster "0BFFh").

As for the U-TOC, the lower part (b) of FIG.
, The areas in which the songs M ₁ , M ₂ and M ₃ are recorded are respectively stored in the table pointer P- as described above.
A start address, an end address, and a track mode are managed in a parts table led after TNO1 to P-TNO3. The track mode of these parts tables is set to "0", which indicates that the data is audio data.

Further, for example, the table pointer P-
In the parts table derived from TNO4, the area set as the general data area is managed. That is, the start address DST _A and end address DE _A shown in the lower part (b) are written in the parts table, the track mode is set to “1”, and the segment is set as the general data area D _1. It is shown that

All such management states of the U-TOC are reflected in the data U-TOC.
Manages each data file. That is, in the data U-TOC, as shown in the upper part (a) of FIG. 22, four data files are recorded in the area (DF
1 to DF4) and U as the general data area D ₁
-A free area EA in which a data file has not yet been recorded in the area set in TOC and data can be recorded thereafter, U-TOC and data U-TO.
Since it is necessary for rewriting C, W is set as a recordable / reproducible area.
A1 and WA2 are managed. In addition, the areas (PWR1 to PWR4) where the recording and reproduction of data are prohibited are also managed.

As the general data area D ₁ managed in the U-TOC, when viewed from the data U-TOC,
Area where each data file is recorded (DF1 to DF
4) and the part including the empty area EA are corresponded, and the UT
On the OC side, all of these are expressed as one song file.

Area where data file is recorded (DF
1 to DF4), directories are created in the data U-TOC, and the file name, extension, update date and time, file start position address, etc. are managed as described above. Then, the continuous state as a data file from the cluster which becomes the file start position address is managed in each CAT unit in the CAT in the form described in FIG. 16 and FIG.
It is accessible. That is, the word W0 of the CAT unit becomes any one of "Fh" to "Bh" shown in FIG. 17, and the words W1 to W3 are used as a jump destination cluster address or the like as necessary.

When a certain data file is set to be rewritable, the word W0 of the CAT unit corresponding to the cluster of the data file is one of "6h" to "3h" shown in FIG. Becomes

UT is set as the general data area D _1.
Regarding the empty area EA of the areas set in OC, the word W0 of the CAT unit corresponding to the cluster of this empty area EA in the CAT is "Fh".
And is managed. Further, for example, when the empty area is made by the erasing operation, in addition to the management by the CAT, the directory unit which is indicated by the category information as the empty area is created.

Since it is necessary to rewrite the U-TOC and the data U-TOC, the areas shown as WA1 and WA2 as the recordable / reproducible areas as shown in FIG. 22 are also managed as recordable / reproducible in the CAT. In addition, the data UT is an area in which neither recording nor reproducing of data is prohibited.
Areas of PWR1 to PWR4 are managed in OC.

Area PW in the recording / reproduction management area
Since R1 and PWR2 are not used for rewriting the U-TOC or the data U-TOC, and the area PWR4, which is the lead-out area, is not used for data recording / reproducing, it corresponds to the cluster of these areas in CAT. The word W0 of the CAT unit is set to “0h” defined in FIG. 17, and recording and reproduction are prohibited. Note that these are areas outside the control of U-TOC, so U
-Not compatible with TOC.

Area PWR3 is composed of music pieces M ₁ , M ₂ ,
M ₃ is the recorded area and is managed correspondingly. Also in this case, the word W0 of the CAT unit corresponding to the cluster of these areas in the CAT is also used.
Is defined as “0h” defined in FIG. 17 and the data U-TO
When viewed from C, recording and reproduction are prohibited. That is,
Since the music pieces M ₁ , M ₂ and M ₃ are audio data,
This should be managed by prohibiting either recording / playback on the data U-TOC, and when a data file is played back using the data U-TOC, it may be mistakenly accessed and played back as general data. To be prevented. Further, when the data file is recorded using the data U-TOC, it is prevented that the data file is accidentally written and the music data is destroyed.

The upper part (a) and the lower part (b) of FIG.
The areas indicated by NA ₁ and NA ₂ are undefined areas, which are managed as unrecorded areas in the U-TOC and are areas where audio data can be recorded. That is, in the U-TOC, it is indicated and managed by the parts table guided from the table pointer P-FRA. In the CAT in the data U-TOC, the word W0 (see FIG. 17) of the CAT unit of the cluster in this portion is any one of "Ah" to "7h".

Since the relationship between the management states of the U-TOC and the data U-TOC is as described above, the recording / reproducing operation is confused even if the audio area and the general data area are mixed on one disc. Disappears. That is UT
When recording / reproducing music using OC, the general data area (D ₁ ) is excluded as an audio recording / reproducing area, and does not affect the general data area. In addition, when recording / reproducing a data file using the data U-TOC, the audio area is managed so that neither recording nor reproducing is prohibited. It will not be accidentally played as a data file.

<8. Recording by data U-TOC management /
Reproducing Operation> The recording / reproducing apparatus 1 at the time of recording / reproducing data using the data U-TOC composed of the CAT, the directory, and the heading sector as described above as management information.
The operation of 0 is shown in the flowchart of FIG. Note that this flowchart shows the control processing operation of the system controller 21 in the recording / reproducing apparatus 10.

When the disc 1 is inserted into the recording / reproducing apparatus 10, the recording / reproducing apparatus 10 first accesses the P-TOC, reads the P-TOC data, and holds it in the buffer RAM 33 (F101). . However, P-TO
If P-TOC is not found during C access, it is determined that the disc is not proper and error processing is performed (F
102 → F103).

After reading the P-TOC data, the P
-In the TOC information, the U-TOC start address U
Referring to ST _A, to confirm the recording position of the U-TOC (a position to be recorded). Then, it is determined whether or not the cluster address portion of the U-TOC start address UST _A is smaller than the cluster address “20h” (F
104). If UST _A ≤ “20h”, there is room to record three consecutive clusters of data U-TOC in the recording / reproducing management area at the address position after the recording position of U-TOC. For this disc, UST _A + "10
Since the position of “h” is set as the start address of the data U-TOC (or is set thereafter), UST
_A + “10h” is grasped as the start address Ad (DU) of the data U-TOC (F105).

If UST _A >"20h",
Next, it is determined whether or not the cluster address portion of the U-TOC start address UST _A is an address smaller than the cluster address “30h” (F104 → F106). UT
OC start address UST _A is cluster address “3
If the address is larger than "0h", the U-TOC is not recorded at the proper position, and it is determined that the disc is not a proper disc, and error processing is performed (F106 → F103).

If UST _A ≤ "30h" in step F106, there is room to record three consecutive data U-TOC in the recording / reproducing management area at the address position ahead of the recording position of U-TOC. For discs, the position of UST _A- "10h" is the data U-TOC.
Since it is set as the start address of (or is set later), UST _A- “10h” is set as the data UT.
Grasping as OC start address Ad (DU) (F10
7).

When the address of the data U-TOC is grasped as described above, it waits for an instruction to record or reproduce the data (F108). If reproduction is instructed, the process proceeds to step F109 to access the data U-TOC at the address Ad (DU). Where the data U-TOC
If no data is found, that is, the data file has not been recorded previously and the data U-TOC has not been generated, and error processing (processing without a file) is performed (F110 → F112).

If the data U-TOC exists at the address Ad (DU), the data U-TOC is read and the data file is searched by the above-mentioned directory or heading data (F111). If the required data file is found, the address of the data file is accessed (F113 → F114), the data is read and the data is read into the buffer RAM 33 (F115). Of course, in this reproducing operation, after confirming the address of the first cluster of the data file to be reproduced from the directory, the CAT refers to the cluster connection state to perform cluster access and reproduce the data file. .

If the required data file is not found by searching the directory, error processing is performed assuming that there is no file (F113 → F112).

If the recording instruction is given in step F108, the process proceeds to step F116, and the address Ad
Access the data U-TOC in (DU). Here, if the data U-TOC is not found, that is, the data file has not been recorded before, the data U-T
It is considered to be a virgin disc in which no OC has been generated, or the disc is considered to be a disc on which music is recorded but no data file is recorded.

On the other hand, the data U-TO is set to the address Ad (DU).
When C is found, in order to determine whether the size (volume) of the data file that is the recording data is the size that can be recorded as it is, the empty area (shown in FIG. 22) shown in the data U-TOC is displayed. Compare with area EA) (F118). If there is sufficient free area, the data file is recorded in the free area on the disc (F119), the data U-TOC is updated according to the recording operation, and the processing is finished (F120).

If it is determined in step F117 that the data U-TOC does not exist, the process proceeds to step F121, where U-TOC
UT by accessing TOC start address UST _A
Read OC. If no U-TOC is found by this access, that is, the disc is a virgin disc in which neither a song nor a data file is recorded. At this time, the process proceeds from step F122 to F124,
The recording capacity of the disc is calculated from the P-TOC, and this is used as the capacity of the empty area.

If the U-TOC exists, the process proceeds from step F122 to F123, and the area indicated by the part table derived from the table pointer P-FRA as the unrecorded area in the U-TOC (FIG. 22). NA
1, NA2) is calculated, and this is regarded as a free area in which a data file can be recorded. Note that, in this case, the area regarded as an empty area is, for example, an area obtained by adding all or a part of the areas NA1 and NA2 to the area EA shown in FIG.

Further, when the free area EA is smaller than the volume of the data file to be recorded in step F118 and the data file cannot be recorded as it is, the U-TOC is accessed and the unrecorded area in the U-TOC is accessed. The area indicated by the parts table derived from the table pointer P-FRA as
, NA1 and NA2) of each of them are calculated, and this is regarded as a free area in which a data file can be recorded. Also in this case, the area regarded as the empty area is, for example, the area obtained by adding all or a part of the areas NA1 and NA2 to the area EA shown in FIG.

Thus, when it is considered that the empty area is created or expanded, in step F126, the newly created or expanded empty area is compared with the volume of the data file to be recorded. If it is determined that the free area is smaller than the volume of the data file to be recorded here as well, it is determined that the data file cannot be recorded on this disc and error processing is performed (F129).

If it is determined in step F126 that there is a recordable empty area for the data file to be recorded, the data file is recorded in the empty area on the disc (area considered to be empty area). Go
(F127).

Also in this case, the data U-TOC is updated according to the recording operation of the data file. Or, if the data U-TOC does not exist, the data U-
A new TOC is generated (initialization and update) and written at the address Ad (DU).

Further, if the area managed as an unrecorded area in the U-TOC is regarded as an empty area for data and the empty area is expanded (when the processing of step F123 or F125 is performed), U -Update TOC as well. That is, when the data file is recorded in the unrecorded area viewed from the U-TOC, the portion excluding the recorded area is guided from the table pointer P-FRA so as to be managed as a new unrecorded area. The segment in which the data file is recorded is assigned for the general data area of P-TNO1 to P-TNO255 so that the part is updated and the recorded area is managed as the general data area. It will be updated so that it will be linked to the part derived from the predetermined table pointer (F12
8).

Thus, in step F128, the data U-T
When the OC is updated and the empty area is expanded, the data U-
After the TOC and U-TOC are updated, the processing is completed.

Although the embodiments have been described above, the input / output unit (data display unit) shown in FIGS. 1 and 2 is a recording device or reproducing device of the present invention which can be used for data recording / reproducing. , Data communication means, image scanner means, key input means) and means for data-font conversion do not necessarily have to include all of them, and only some of them are provided according to the application. May be. Further, other data input / output means may be added.

Further, the audio data may not be used and the disk format may be the same as that described in the embodiment or may be dedicated to the general data recording / reproducing application. In this case, only the audio signal is used as the recording device or the reproducing device. Input / output system corresponding to (encoder 37, decoder 38, A / D converter 36, D / A converter 39, etc.)
Is unnecessary.

[0195]

As described above, the disk recording of the present invention is performed.
The recording medium corresponding to the recording / reproducing apparatus has audio data management information (U-TOC) and general data management information (data) in a predetermined management area as management information for managing recording / reproducing operations. U-TOC), dedicated management information suitable for data file management can be provided for general data in addition to audio data, and an area used for recording / reproducing various data can be provided. There is an effect that a recording medium corresponding to both audio data and general data can be realized by dividing the audio data area or the general data area and sharing it on the recording medium.

At this time, the management information for audio data is at least management information for recording / playback of each audio data unit in the audio data area and management information for discriminating and managing the audio data area and the general data area. In addition, the general data management information should include at least management information for recording / playback of the general data file and management information for prohibiting recording / playback operations in the audio data area. By this, the recording / reproducing area of the recording medium is clearly managed in the portion used as the audio data area and the portion used as the general data area, and erroneous recording / erroneous erasing / reproducing errors due to mixed data are prevented. Then, appropriate data recording / reproduction will be performed.

Further, as a disc reproducing apparatus of the present invention corresponding to such a recording medium, when reproducing audio data, a required audio data unit is reproduced by using audio data management information, and in general, When playing a data file, it is possible to play back properly on a recording medium where audio data and general data are shared by configuring the required data file to be played using the general data management information. The effect is that

That is, in the case of audio data reproduction, if the management information for audio data is referred to, the part used as the audio data area and the part used as the general data area are managed. Even if the management information is not referred to, the general data is reproduced by mistake and no output error occurs. Similarly, in the case of general data reproduction, if the general data management information is referenced, the audio data area is managed as a recording / reproduction prohibited area, and therefore the audio data is reproduced without reference to the audio data management information. It does not happen. Further, since it is sufficient to refer to only one management information in this way, there is an effect that a quick reproduction operation can be performed.

Further, as the disc recording apparatus of the present invention corresponding to such a recording medium, when recording audio data, a required management information updating process according to the recording operation is performed on the audio data management information. On the other hand,
When recording a general data file, the necessary management information update processing is performed on the general data management information according to the recording operation, and if the general data area is expanded during the recording operation, the expansion If the required management information updating process is performed on the audio data management information according to the operation, there is an effect that appropriate recording management can be performed.

That is, since the recording operation is performed in the audio data area and the general data area is not affected by the recording operation, it is not necessary to update the general data management information. Appropriate management of audio data is realized by performing required management information update processing for audio data management information according to the recording operation. In addition, this enables rapid recording of audio data.

On the other hand, when the general data file is recorded, the data file management is properly performed by performing the necessary management information updating process according to the recording operation on the general data management information. Further, when the general data area is expanded and recorded when the data file is recorded, if the management information for discriminating and managing the audio data area and the general data area in the audio data management information is rewritten, Even after that, the audio data area and the general data area can be properly coexisted on one recording medium and managed.

As described above, the present invention is extended to a recording / reproducing system for music as a data recording / reproducing system, and a recording medium and a disk recording device capable of recording / reproducing audio data and general data in common. ,
Also, there is an effect that it is possible to provide a disc reproducing apparatus.

[Brief description of drawings]

FIG. 1 is an external view of a recording medium and a disc recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram of a disk recording / reproducing apparatus of an embodiment.

FIG. 3 is an explanatory diagram of P-TOC information provided on the recording medium of the embodiment.

FIG. 4 is an explanatory diagram of U-TOC information provided on the recording medium of the embodiment.

FIG. 5 is an explanatory diagram of a link structure of U-TOC information provided on the recording medium of the embodiment.

FIG. 6 is an explanatory diagram of an area management state of the recording medium of the embodiment.

FIG. 7 is an explanatory diagram of a track structure of a recording medium of an example.

FIG. 8 is an explanatory diagram of a data sector provided on the recording medium of the embodiment.

FIG. 9 is an explanatory diagram of a data sector mode 0 provided on the recording medium of the embodiment.

FIG. 10 is an explanatory diagram of a data sector mode 1 provided on the recording medium of the embodiment.

FIG. 11 is an explanatory diagram of a data sector mode 2 provided on the recording medium of the embodiment.

FIG. 12 is data UT provided on the recording medium of the embodiment.
It is explanatory drawing of the structure of the cluster of OC.

FIG. 13 is a diagram showing data UT provided on the recording medium of the embodiment.
It is explanatory drawing of the CAT0 sector of OC.

FIG. 14 is data UT provided on the recording medium of the embodiment.
It is explanatory drawing of the CAT1 sector of OC.

FIG. 15 is data UT provided on the recording medium of the embodiment.
It is explanatory drawing of the CAT2 sector of OC.

FIG. 16 is data UT provided on the recording medium of the embodiment.
It is explanatory drawing of the CAT unit of OC.

FIG. 17 is an explanatory diagram of word definition of a CAT unit in the recording medium of the embodiment.

FIG. 18 is data UT provided on the recording medium of the embodiment.
It is explanatory drawing of the directory sector of OC.

FIG. 19 is an explanatory diagram of a directory hierarchical structure in the data U-TOC of the embodiment.

FIG. 20 is data UT provided on the recording medium of the embodiment.
It is explanatory drawing of the heading sector of OC.

FIG. 21 is data UT provided on the recording medium of the embodiment.
It is explanatory drawing of the heading sector of OC.

FIG. 22 is a data UT provided on the recording medium of the embodiment.
It is explanatory drawing of the relationship of OC and the management state of U-TOC.

FIG. 23 is a flowchart of an operation process for a recording medium of the disc recording / reproducing apparatus in the example.

[Explanation of symbols]

1 disc 10 Recording / reproducing device 11 Disc insertion part 12 Key input section 13 Display 14 Image scanner section 15 Input / output connector section 16 input / output terminals 21 System Controller 23 Optical head 28 decoder 30 encoder 32 conversion memory 33 buffer RAM 34 Communication circuit 35 Display controller 36 A / D converter 37 Encoder part 38 Decoder part 39 D / A converter

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) G11B 20/12 G11B 27/00 G11B 20/10

Claims (2)

(57) [Claims] 1. Audio for recording audio data
Audio data area , a general data area in which a general data file is recorded, and audio files recorded in the audio data area.
The start address and end address of each data
Manage the start and end addresses of the entire data area
The first management area in which the first management information is recorded and the entire audio data area are combined into one data file.
An identifier that identifies a recording / playback prohibited area
And each general data recorded in the above general data area.
The second consisting of the file start position address for each file
Disc reproduction capable of reproducing a disc-shaped recording medium having a second management area in which management information is recorded
In the device, the second management area is attached to the mounted disc-shaped recording medium.
Discriminating means for discriminating whether or not there is an area, and the disc-shaped recording medium mounted by the discriminating means.
When it is determined that the second management area exists,
Upper part of the second management information recorded in the second management area
The entire audio data area is recorded based on the identifier.
In addition to the recording and reproduction prohibition control , the upper part of the second management information recorded in the second management area is recorded.
At the file start position address of each general data file
Control access to each general data file based on
A disc reproducing apparatus comprising means . 2. An audio system in which audio data is recorded
Audio data area , a general data area in which a general data file is recorded, and audio files recorded in the audio data area.
Start address and end address of each data and recordable area
Area start address and end address and the above general data area
A first tube that manages the entire start and end addresses
The first management area in which the physical information is recorded and the entire audio data area as a single data file
An identifier that identifies a recording / playback prohibited area
And each general data recorded in the above general data area.
The second consisting of the file start position address for each file
Disc recording capable of recording on a disc-shaped recording medium having a second management area in which management information is recorded
In the device, the second management area is attached to the mounted disc-shaped recording medium.
The first to determine whether the second management information exists in the area
Discriminating means and disc-shaped recording mounted by the first discriminating means
There is no second management information in the second management area on the medium.
If it is determined that the disc is mounted,
The recording medium has the first management information in the first management area.
Second discriminating means for discriminating whether or not the disc-shaped recording is mounted by the second discriminating means.
First management information exists in the first management area on the medium
If it is determined that it is recorded in the first management area
Based on the start address and end address of the recordable area
To calculate the recordable capacity and the recordable capacity calculated by the above calculating means
A comparison tool that compares the file sizes of general data files
And the recordable capacity calculated by the calculating means by the comparing means
File size of the general data file that you want to record
Want to make the above record when it is judged to be larger
The data file is recorded and the second management area is
Recording means for recording physical information.
Disk recording device.