JP2001236770A - Disk recording medium, recording device, reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend an expression range of a track number and an index number of a sub-code keeping interchangeability for a standard disk. SOLUTION: A value which can be expressed as a track number in a range of 8 bits being same as a conventional sub-code format, a track number indicated by point information, and an index number is extended by using a binary code of 8 bits in track number information of a sub-code, point information, and index information index information. Also, conflict of a setting value of conventional specific definition as a track number and point is prevented by restricting a value corresponding to a track number itself or an index number itself to a range of '01'-'9F' in a binary code, thereby, interchangeability is kept suitable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording medium of a CD format, and a recording apparatus and a reproducing apparatus corresponding to the disk recording medium.

[0002]

2. Description of the Related Art For example, CD-DA (Compact Disc-Digital Audio), C
D-ROM, CD-R (CD-RECORDABLE), CD-RW
(CD-REWRITABLE), CD-TEXT, so-called CD
Various discs belonging to the family have been developed and spread. CD-DA and CD-ROM are read-only media. On the other hand, a CD-R is a write-once medium using an organic dye for a recording layer, and a CD-RW
Is a data rewritable medium using a phase change technique.

As is well known, data such as music, video, computer data, and the like are recorded on such a CD-format disc, and track numbers, indexes, addresses, and the like are recorded as subcodes. The index is a unit that divides a track into smaller pieces. For example, it is a unit that separates movements in music. As the address, an absolute address as a continuous value over the entire disk or a relative address given in units of tracks (also called programs; for example, one music unit in the case of music data) is recorded. Thus, an absolute address (absolute address) and a relative address (relative address) can be recognized by extracting the subcode at each position on the disk. On the innermost side of the disk, so-called TOC information is formed by subcode information, and an address indicating the head or area of each track is described. The content of the indicated address (what address is) is It is identified by the point information presenting the information content.

[0004] In the case of the CD format, the address on the sub-code is expressed by 8 bits of minutes, seconds and frames. The 8 bits are BCD (Binary C)
Since it is an oded decimal (binary-decimal) code, “0” to “99” can be expressed by 8 bits. Therefore, 0 minutes to 99 minutes can be expressed as “minutes”. However, the “second” is naturally from “0” to “59”, and the “frame” is defined as 75 frames from frame 0 to frame 74 in the CD format. Is expressed.

[0005] Similarly, the track number, index, and point are each expressed by a BCD code in 8 bits. Accordingly, the track number can be expressed in decimal notation from "0" to "99" (however, "0" indicates lead-in). The index can be expressed from “1” to “99”. The points used in the TOC are “01” to “BCD value”.
"99" corresponds to the track number of that value, and a value such as "A0" or "A1" in hexadecimal notation indicates the content of the information that follows.

As will be described in detail later, in the subcode (ie, TOC) in the lead-in area, the 8 bits following the track number are used as points, while in the program area and lead-out area, the 8 bits following the track number are used as points. Is an index. That is, in the subcode format, the same bit is used for the index and the pointer depending on the area.

[0007]

In response to recent demands for increasing the capacity of recording media, large-capacity disks (for example, current CDs) have been developed by increasing the recording density. Discs realizing double capacity discs) have been developed. Hereinafter, such a disk will be referred to as a "high-density disk" for explanation, and a CD-format disk having a conventional capacity will be referred to as a "standard disk".

However, when such a high-density disk is put to practical use as a variation of the CD format disk, the following problem occurs. For example, in the case of a CD-DA as a standard disc, a maximum of 7
Music data can be recorded in 4 minutes 59 seconds 74 frames. The data capacity is about 800 Mbytes. On the other hand, with a high-density disc, for example, if the capacity is doubled, recording for about 150 minutes is possible. In such a case, it is not preferable that the track number and the index number are limited to “99” from the above circumstances. That is, for example, 100 songs (10
This is because a disc recording more than (0 track) can be assumed. Of course, the points in the TOC also need to correspond to the track numbers, and thus must be able to cope with a case where, for example, 100 tracks or more are recorded. Because of this, in the information as track number, index, point,
There is a demand to expand the expression range to 100 or more.

Here, if the address format (subcode format) is developed exclusively for a high-density disk, the expressible track number can be easily increased, but in such a case, a standard disk and a high-density disk (and (Compatible disk drive devices), the compatibility cannot be obtained, which is not preferable. In addition, the track number expression range can be extended by using other areas (for example, empty bits or bits that are not normally used) in the subcode. However, compatibility is maintained and the subcode decoding process of the drive device becomes complicated. This is also undesirable from the viewpoint of not inviting. For this reason, a subcode form that can support high-density disks while maintaining compatibility is desired.

[0010]

SUMMARY OF THE INVENTION The present invention provides a sub-code format which can cope with a high-density disc and maintain compatibility with a standard disc.

For this reason, the present invention is as follows as a disk recording medium that can be adopted as a high-density disk, for example. That is, the track number information is 8 as the subcode.
A disc recording medium conforming to a CD format represented by a BCD code of bits, wherein the track number information is recorded by an 8-bit binary code. The value of “01” to “9F” in hexadecimal notation as the binary code value is set to represent the track number itself.
Also, a disc recording medium conforming to a CD format in which point information indicating a content type of predetermined information is represented as an 8-bit BCD code as the subcode, wherein the point information is recorded in an 8-bit binary code In addition, the values of “01” to “9F” as the binary code values are set as point information values indicating the track number itself. A disc recording medium conforming to a CD format in which index information for subdividing a track is represented by an 8-bit BCD code as a subcode, wherein the index information is recorded by an 8-bit binary code. , The values of “01” to “9F” as the binary code values represent the index number itself.

According to the recording apparatus of the present invention, the track number information, the point information, and the index information have a BC of 8 bits.
The first disk recording medium recorded by the D code and the track number information, the point information, and the index information are 8
It is recorded by a binary code of bits, and they are recorded on both the second disk recording medium in which the values of “01” to “9F” in hexadecimal notation represent the track number itself or the index number itself. A recording device that can perform the recording. Discriminating means for discriminating whether the disc recording medium to be recorded is the first disc recording medium or the second disc recording medium; and If the discrimination is made, subcode data expressing track number information, point information, and index information is generated by using an 8-bit BCD code, and recording of the subcode is executed.
Control means for generating sub-code data expressing track number information, point information, and index information using an 8-bit binary code, and executing recording of the sub-code when the disc recording medium is determined as To do.

The playback apparatus of the present invention has a BC number of 8 bits for track number information, point information, and index information.
The first disk recording medium recorded by the D code and the track number information, the point information, and the index information are 8
It is recorded by a binary code of bits, and they are reproduced on both the second disk recording medium in which the value of “01” to “9F” in hexadecimal notation represents the track number itself or the index number itself. The playback device can perform the playback. Discriminating means for discriminating whether the disc recording medium to be reproduced is the first disc recording medium or the second disc recording medium; and If it is determined, the track number information, the point information, and the index information included in the reproduced subcode are recognized as a track number value represented by an 8-bit BCD code, and the second disk recording is performed by the determination unit. Control means for recognizing track number information, point information, and index information included in the reproduced sub-code as a track number value represented by an 8-bit binary code when the medium is determined to be a medium;
Be prepared to have.

That is, in the present invention, by using an 8-bit binary code, it is possible to expand the values that can be expressed as track number information, point information, and index information within a range of 8 bits. That is, by expanding the expression value without changing the bit / byte assignment in the subcode format, it is possible to maintain compatibility with a high-density disc and compatibility with a standard disc. In addition, the value corresponding to the track number itself or the index number itself is limited to the range of “01” to “9F” in the binary code, so that the value conflicts with the setting value of the previous special definition as the track number or point. Thus, compatibility is maintained and simplicity of decoding / encoding of subcode information is maintained.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a disk as an embodiment of the present invention and a disk drive as an embodiment of a recording apparatus and a reproducing apparatus of the present invention will be described in the following order. 1. Disk type 2. 2. Subcode and TOC 3. Configuration of disk drive device Processing example of disk drive device

1. 1. Disc Type FIG. 1 shows the type of disc realized as the CD-format disc of the present embodiment. FIG. 1A shows a standard disc in which the entire area of the disc has a conventional recording density. CD-DA, CD-ROM, and CD currently in widespread use
-R, CD-RW and the like correspond to this. FIG. 1 (b)
Is a high-density disc developed in recent years.
This is a type in which the entire area of the disc is recorded at high density.
For example, a disc having a density twice or more than that of a standard disc has been developed. In particular, CD-R, CD-R
A high-density disk recordable as W has been developed.
FIGS. 1C and 1D show a hybrid disc in which a standard density area and a high density area are separated on the inner circumference side and the outer circumference side (or vice versa).

For example, when considering a standard disk and a high-density disk shown in FIGS. 1A and 1B, it is necessary for the disk drive device to determine the disk type when the disk is loaded. Also, considering the hybrid discs shown in FIGS. 1C and 1D, the disc drive device needs to determine the area type of the area currently being recorded or reproduced is a high-density area or a standard-density area. is there.

In the embodiment of the present invention to be described below, a track number, an index, a point, and a sufficient expression value range can be realized for a high-density disc indicated by a subcode. In this example, the address (absolute time, time in the track) can express a sufficient address value range in a high-density disc, and can include data indicating the disc type / area type. ing.

2. Subcode and TOC The TOC and the subcode recorded in the lead-in area on the CD format disc will be described. The minimum unit of data recorded on a CD disk is one frame. One block is composed of 98 frames.

The structure of one frame is as shown in FIG. 1
The frame is composed of 588 bits. The first 24 bits are used as synchronization data, and the following 14 bits are used as a subcode data area. After that, data and parity are allocated.

One frame is composed of 98 frames, and the subcode data extracted from the 98 frames are collected to form one block of subcode data (subcoding frame) as shown in FIG. ) Is formed. First and second frames at the beginning of 98 frames (frame 98n + 1, frame 98n + 2)
Is a synchronization pattern.
Then, from the third frame to the 98th frame (frame 9
8n + 3 to frame 98n + 98), each of which has 96 bits of channel data, that is, P, Q, R, S, T, U,
V and W subcode data are formed.

Of these, P for managing access, etc.
Channel and Q channel are used. However, the P channel only indicates a pause portion between tracks, and the finer control is performed on the Q channel (Q1 to Q1).
Q96). The 96-bit Q channel data is configured as shown in FIG.

First, four bits Q1 to Q4 are used as control data, and are used for discrimination of the number of audio channels, emphasis, CD-ROM, whether digital copying is possible, and the like.

Next, the four bits Q5 to Q8 are set to ADR, which indicates the mode of the sub-Q data. Specifically, the mode (sub-Q data content) is expressed by the four bits of ADR as follows. 0000: Mode 0: Basically, sub-Q data is all zero (used in CD-RW) 0001: Mode 1: Normal mode 0010: Mode 2: Indicates the catalog number of the disc 0011: Mode 3 ..ISRC (International St
0100: Mode 4: Used for CD-V 0101: Mode 5: CD-R, CD-RW, CD
-Used in multi-session systems such as EXTRA

The above is the mode defined by the conventional CD format. In this embodiment, the following mode is further set according to the ADR value. 1000: Mode 8: Basically, sub-Q data is all zero (used for CD-RW) 1001: Mode 9: Normal mode 1010: Mode A: Indicates the disc catalog number 1011: Mode B ..ISRC (International St
1100: Mode C: Used for CD-V 1101: Mode D: CD-R, CD-RW, CD
-Used in multi-session systems such as EXTRA

As described above, the most significant bit of the ADR is "1".
The contents of the modes 8 to D are the same as those of the modes 0 to 5, but the modes 8 to D indicate the modes corresponding to the high-density disk. That is,
For standard discs (or standard density areas)
R indicates any one of modes 0 to 5, while a high-density disc (or high-density area)
The ADR indicates one of modes 8 to D. In particular, as an address format based on the sub-Q data described later, an 8-bit BCD
In the form of minutes / seconds / frames by code, the track number, pointer, and index are also indicated by the 8-bit BCD code. On a high-density disc (high-density mode), the address is a 24-bit binary. LBA (Logical Block Addres)
s: logical block address), and the track number, pointer, and index are each represented by an 8-bit binary code.

It is merely an example that the address is indicated by a 24-bit binary code on a high-density disc, and the present invention uses a BCD code as in the standard mode. If the address is desired to be further expanded, a form as shown in FIG. 11 described later may be adopted.

The value of the ADR is "0110"
Although "0111", that is, mode 6 and mode 7 are not defined, this is reserved for a mode to be defined in the future for a standard disc. Similarly, "111
“0” and “1111”, that is, modes E and F are reserved for a mode defined in the future for a high-density disc.

The 72 bits Q9 to Q80 following the ADR are used as sub-Q data, and the remaining Q81 to Q96 are CR bits.
C.

The address is expressed by the sub-Q data when the mode 1 or the mode 9 is indicated by the ADR. Regarding the address form in the sub-Q data, the case of a standard disk (ADR = mode 1) will be described first, and the case of a high-density disk (ADR = mode 9) will be described later.

The sub-Q data and TOC structure in the case of ADR = mode 1 will be described with reference to FIGS. In the lead-in area of the disc, the sub-Q
The data is the TOC information. That is, Q9 to Q9 in the Q channel data read from the lead-in area
The 72-bit sub-Q data of Q80 has information as shown in FIG. FIG. 4 (a)
Shows the structure of FIG. 3B in the lead-in area as 72
This shows the details of the sub Q data portion of the bit. The sub-Q data has 8-bit data, and T
Expresses OC information.

First, a track number (TNO) is recorded by eight bits Q9 to Q16. In the lead-in area, the track number is fixed to “00”. Then Q17 ~
POINT (point) is described by 8 bits of Q24. Q25-Q32, Q33-Q40, Q41-Q48
MIN as the elapsed time in the track
(Minute), SEC (second), and FRAME (frame) are shown. Q49 to Q56 are set to “00000000”. Further, Q57 to Q64, Q65 to Q72, Q73
PMIN, PSEC, PFR with 8 bits for each of ~ Q80
AME is recorded, but this PMIN, PSEC, PF
The meaning of RAME is determined by the value of POINT.

When the value of POINT is "01" to "99", the value of POINT means a track number,
In this case, in PMIN, PSEC, and PFRAME, the start point (absolute time address) of the track of the track number is minute (PMIN), second (PSE).
C), frame (PFRAME).

When the value of POINT is "A0", PM
The track number of the first track is recorded in IN.
Further, specifications such as CD-DA (digital audio), CD-I, and CD-ROM (XA specification) are distinguished by the value of PSEC. When the value of POINT is “A1”, the track number of the last track is recorded in PMIN. When the value of POINT is “A2”, the PMI
The start point of the lead-out area is the absolute time address (minute (PMIN), N, PSEC, PFRAME).
Seconds (PSEC), frames (PFRAME)).

For example, in the case of a disc on which six tracks are recorded, data is recorded as TOC based on such sub-Q data as shown in FIG. TOC
Therefore, the track numbers TNO are all "00" as shown in FIG. Block NO. Is 9 as described above
It shows the number of one unit of sub-Q data read as block data (sub-coding frame) of eight frames. Each TOC data has the same contents written over three blocks. As shown in the figure, when POINT is "01" to "06", PMIN, P
The start points of the first track # 1 to the sixth track # 6 are shown as SEC and PFRAME.

When POINT is "A0", PM
“01” is shown as the first track number in IN. The disc is identified by the value of PSEC, and is "00" in the case of a normal audio CD. If the disc is a CD-ROM (XA specification), P
SEC = “20”, and “10” for CD-I.

When the value of POINT is "A1", P
The track number of the last track is recorded in MIN,
When the value of POINT is “A2”, PMIN, PSE
C, PFRAME indicate the start point of the lead-out area. After block n + 27, block n
.. N + 26 are repeatedly recorded.

In the program area and the lead-out area where music and the like are recorded as tracks # 1 to #n, the sub-Q data recorded therein has the information shown in FIG. FIG. 4B shows the structure of FIG. 3B in the program area and the lead-out area in detail for a 72-bit sub Q data portion.

In this case, first, a track number (TNO) is recorded by eight bits Q9 to Q16. That is, for each of the tracks # 1 to #n, the value is any one of "01" to "99". In the lead-out area, the track number is "AA". Subsequently, an index (X) is recorded with 8 bits Q17 to Q24. The index is information that can further subdivide each track.

Q25 to Q32, Q33 to Q40, Q41
Each of the 8 bits from Q48 to Q48 indicates MIN (minute), SEC (second), FRA
The ME (frame) is shown. Q49-Q56 is "00
000000 ”. Q57-Q64, Q65-Q
8 bits of 72, Q73-Q80 are AMIN, ASE
C, AFRAME, which are minute (AMIN), second (ASEC), and frame (AF) as absolute addresses.
RAME). The absolute address is an address continuously added from the head of the first track (that is, the head of the program area) to the lead-out area.

In the CD format, the subcode is configured as described above. In the subcode Q data, an area for expressing the absolute address
IN, ASEC, AFRAME are arranged, and MIN, SEC, FRAM
E is arranged. Further, PMIN, PMIN,
PSEC and PFRAME are provided. Each of these has a form indicating an address value as minutes, seconds, and a frame number. Each of the 8 bits has a value described in a BCD code.

Absolute address AMIN, ASEC, AFR
The BCD code is shown in FIG. 6 taking AME as an example. BC
The D code is a code system expressing “0” to “9” in 4-bit units. Therefore, according to the 8-bit BCD code, values from “00” to “99” can be expressed. That is, up to “99” is represented by the upper 4 bits indicating the tens digit and the lower 4 bits indicating the 1 digit.

For this reason, the AMIN (minute) is "00000000" to "10011001" as shown in the figure.
Can take a value from “0” to “99”. Since ASEC (second) only needs to be expressed up to 59 seconds, "00000000" to "01011001"
Takes a value from “0” to “59”. AFRAME
As (frames), since there are 75 frames per second in the CD format, "00000000"
"01110100" is set to a value from "0" to "74".

Here, absolute addresses AMIN, ASE
C, AFRAME as an example, but the relative address MI
The same applies to N, SEC and FRAME.
The same applies to the case where an address is indicated by IN, PSEC, and PFRAME.

Each of the track number (TNO), point (POINT), and index (X) in the subcode is described by an 8-bit BCD code.

FIG. 7 shows B for track number (TNO), point (POINT) and index (X).
Indicates a CD code. That is, regarding the track number (TNO), “00000000” to “10011001”
As a result, a value from "0" to "99" can be taken as the value of the track number itself. That is, up to 99 tracks can be managed in the format. However, "00" is specified to indicate the lead-in area. “AA” (= 10101010) indicates a lead-out area.

The points (POINT) and the indexes (X) are also "00000000" to "1001".
1001 ”can take a value from“ 0 ”to“ 99 ”. However, what is shown in FIG. 7 is the point (POIN
T) is only when the value itself indicates the track number. As described above, in the TOC, the value of the point (POINT) is “A0” (= 10100).
000), "A2" (= 10100001), and the like, and "B *", "C *", and the like after "A3" can be defined now or in the future. That is, as shown in FIG. 7, the range in which the point (POINT) simply represents a numerical value (track number from 0 to 99) is as shown in FIG. 7, but "10100000" and thereafter are used for various definitions.

Next, when the mode 9 is indicated by the above-mentioned ADR, that is, a high-density disc (or a high-density area)
The structure of the sub-Q data that can be adapted to is described.

FIG. 8 shows the structure of sub-Q data in the case of ADR = mode 9. Also in this case, in the lead-in area of the disc, the sub-Q data recorded there is the TOC information. Q9 to Q80 in the Q channel data read from the lead-in area
72-bit sub-Q data has information as shown in FIG. Note that, like FIG. 4A, FIG. 8A shows FIG. 3 in the lead-in area.
FIG. 7B shows the structure of the sub-Q data of 72 bits in detail.

The structure shown in FIG.
Track number (TNO) of Q16, POINT (point) of Q17 to Q24, “0000” of Q49 to Q56
0000 ”is the same as FIG.
It is the same as (a). However, in this case, the track number (TNO) and the point (POINT) are such that eight bits represent a numerical value as a binary code. However, the expression range of the numerical value as the track number is limited to “00” to “9F”. In decimal notation, it is "0" to "159".

In this case, 24 bits Q25 to Q48 indicate the block address R-LBA as a relative address in the track. Q57
Address pointer P-LBA with 24 bits to Q80
Is recorded. The meaning of the address pointer P-LBA is determined by the value of POINT, like PMIN, PSEC, and PFRAME in FIG.
That is, the value of POINT is "01" to "9F", that is, 1
If the decimal number is "01" to "159", the POI
The value of NT means the track number. In this case, in the address pointer P-LBA, the start point of the track of that track number is recorded as a logical block address.

When the value of POINT is "A2",
The start point of the lead-out area is indicated as a logical block address in the address pointer P-LBA. When the value of POINT is “A0” or “A1”, the address pointer P-LBA does not actually indicate the address, but as described above, the track number of the first track, the discrimination of the disc specification, Since the track number and the like of the last track are recorded, the 24 bits of the address pointer P-LBA are set in FIG.
, PMIN, PSEC, and PFRAME.

The TOC data as shown in FIG. 5 is also represented by the sub-Q data as shown in FIG. 8 (a). In FIG. 5, PMIN, PSEC and PFR are shown.
The address value indicated as the AME value is indicated as a 24-bit logical block address.

In the program area and the lead-out area in which music and the like are recorded as tracks # 1 to #n, the sub-Q data recorded therein has the information shown in FIG. FIG. 8B shows the structure of FIG. 3B in the program area and the lead-out area in detail for the sub-Q data portion of 72 bits.

The structure of the sub-Q data shown in FIG.
Track numbers (TNO) of Q9 to Q16, Q17 to Q
Index of 24, "000000" of Q49-Q56
00 ”in FIG. 4B in terms of bit allocation.
Is the same as However, in this case, the track number (TN)
O) and the index (X) are those whose eight bits represent a numerical value as a binary code. However, the expression range of the numerical value as the track number or the index number is limited to “00” to “9F”. 1
It is "0" to "159" in a 0-base notation.

In this case, the block address R-LBA is indicated as a relative address in the track by 24 bits Q25 to Q48. The block address AL as an absolute address is composed of 24 bits Q57 to Q80.
BA is recorded. The absolute block address is an address continuously added from the head of the first track (that is, the head of the program area) to the lead-out area.

As described above, in the case of ADR = mode 9, the subcode is configured as described above. In this subcode Q data, A-LBA is arranged as an area representing an absolute address. R-LBA is arranged as an area for expressing a relative address. Further, P-LBA is arranged as an address pointer indicating the head of the track or the lead-out area. These are each 24
The bit address is represented by a binary code.

FIG. 9 shows address values in 24-bit binary code, taking the absolute block address A-LBA as an example. According to the 24-bit binary code, as shown, the address value “0” to the address value “FFFFF”
F ”(= 2 ²⁴ ). A block (sector) to which one block address is assigned is a unit corresponding to a sub-coding frame, and its sector capacity is 2048 bytes (or 2352 bytes).
That is, it is 2 ¹¹ (bytes). Therefore, in terms of capacity,
2 ³⁵ (bytes), that is, a capacity of about 34 Gbytes can be expressed in terms of address.

Here, A-LBA is taken as an example, but R-
The same applies to the case of LBA, and also to the case where the address is indicated by P-LBA.

Further, in the subcode in the case of ADR = mode 9, as described above, the track number (TNO), point (POINT), and index (X) are each represented by an 8-bit binary code of "00" to "9F". "
Is expressed in the range. That is, as shown in FIG. 10, the track number (TNO) is “000”.
"0000" to "10011111"
It is possible to take a value up to “9F (= 159)”.
In other words, the number of tracks that can be managed on the format is 159
It will be expanded to the truck. As in the case of the standard mode, “00” is defined to indicate the lead-in area, and “AA” (= 10101010) is defined to indicate the lead-out area.

The points (POINT) and the indexes (X) are also “00000000” to “1001”.
By taking values from “0” to “9F” by “11111”, the point (POINT) can be made to correspond to the track number (TNO), and the index (X) can be set to 159 in one track. It can be subdivided.

By the way, the value of the track number itself or the index number itself in the information is in the range of "00" to "9F" for the following reason. As described above, in the conventional CD format, that is, in the subcode information of FIG.
NT), except for the case where the value indicates the track number, from “A0”, “A2” or “A3”,
Special definitions such as "B *" and "C *" are defined.

Therefore, if the track number (TNO) includes “A0” which is the next value after “9F”, when the point (POINT) indicates the track number, the special code “A0” is added. I have to use it. Then, the point (POINT) is represented by “A” as a value representing the track number by a binary code.
"0" or subsequent "A2""A3" ... "B *"
If “C *” is used, the definition of “A1” must be changed between the high-density mode and the standard mode.
Not appropriate for maintaining compatibility. For example, in a recording / reproducing apparatus, different definitions are used between a high-density disc and a standard disc, so that the load on software or hardware is increased.

For this reason, the track number is increased by "9
F "(= 159) and the range of" A "when the value of the point (POINT) indicates the track number is" A ".
The definition after "A0" is used as it is, as it is not used after "0" even in the high-density mode. Therefore, the value of the point (POINT) is “0” although it is based on a binary code.
Values from "0" to "9F" correspond to the track number,
"A0" and thereafter are used for special definition.

In correspondence with the point (POINT) up to “9F” except for the special definition, the index (X) having the same bit assignment on the subcode format is also “00”. ~ "9F"
Up to the binary code.

Note that setting the track number up to “9F” means that the track number “A” in the standard mode is used.
A ", that is, the definition of the track number value indicating the lead-out can be used as it is even in the high-density mode.

In the case of ADR = mode 1 or mode 9, the subcode structure is as described above.
The LBA mode (high-density disk / high-density area) is indicated by the most significant bit = “1”, and the address value is indicated by a 24-bit binary logical block address. This is sufficient for a high-density disc manufactured. And the track number and index number are 15
Since it can be expanded to 9, the number of tracks and the number of indexes that can be managed (recordable) are sufficient for a high-density disc. Further, the track number is expanded up to 159, that is, up to “9F”, so that the value “A0” specially defined as a point (POINT) is obtained.
.., Or “AA” specially defined as a track number (TNO). Therefore, in other words, according to this example, a high-density disk can be realized by using the sub-code structure and the special definition of the value of the CD format as they are.

Also, by expressing the LBA mode by the most significant bit of the ADR = “1”, whether the disk is a high-density disk (high-density area) or a standard disk (standard-density area) using only subcodes Can be identified.

In the ADR mode, mode 1 and mode 8, mode 2 and mode 9,... Mode 5 mode D have the same contents. In other words, since one code corresponds to one mode content, the lower three bits of the ADR do not complicate the processing due to the extended mode. Further, as described above, it is possible to cope with future mode addition.

In the above description, in the high-density mode sub-code format, the address is represented by a 24-bit binary logical block address. However, the address may be represented by a BCD code. FIG. 11 shows an example. In this FIG.
The eight bits Q49 to Q56 are used every four bits to indicate “time”, which is the higher order of minutes / second / frame.

That is, in the lead-in area, as shown in FIG. 11A, the time "HOUR", which is the higher order of "MIN", "SEC", and "FRAME", is recorded by four bits Q49, Q50, Q51, and Q52. Q53,
4 bits of Q54, Q55 and Q56, "PMIN",
"PSEC", "PFRAME" is the higher time "P
HOUR ”is recorded. Also, in the track # 1... Lead-out area, as shown in FIG. 11B, four bits Q49, Q50, Q51, and Q52 are used to set the time “MN”, “SEC”, and “FRAME” that are higher than HOUR "is recorded, and Q53,
4 bits of Q54, Q55 and Q56, "AMIN",
The time “A” that is higher in “ASEC” and “AFRAME”
HOUR ”is recorded.

Each of the 8-bit values constituting these addresses is represented by a BCD code. Therefore, "HOUR"
“PHOUR” and “AHOUR” can be expressed from 0 to 9 hours, which is a range that can sufficiently cope with high-density discs.

In FIG. 11, the track numbers (TNO) are represented by binary codes "00" to "9".
F "and" AA "are represented, the index (X) is represented by" 00 "to" 9F "by a binary code, and the point (POINT) is represented by" 00 "by a binary code.
To “9F” and values after “A0”. Such a subcode format is suitable for high-density discs and for maintaining compatibility with standard discs.

3. Configuration of Disk Drive Device Next, a description will be given of a disk drive device capable of performing recording / reproduction corresponding to various types of disks as described above. FIG. 12 shows the configuration of the disk drive device 70.
In FIG. 12, a disc 90 is a CD-R, a CD-R
It is a disk of CD format such as W, CD-DA, CD-ROM. As these disks, FIG.
As shown, there are a standard disk, a high-density disk, a hybrid disk, and the like.

The disk 90 is loaded on the turntable 7, and during recording / reproducing operation, the spindle motor 1 drives the disk 90 at a constant linear velocity (CLV) or a constant angular velocity (CA).
V). Then, pit data on the disk 90 is read by the optical pickup 1. The pit is a phase change pit in the case of a CD-RW,
In the case of CD-R, it is a pit due to a change in organic dye (change in reflectance), and in the case of a CD-DA or CD-ROM, it is an emboss pit.

In the pickup 1, a laser diode 4 as a laser light source, a photodetector 5 for detecting reflected light, an objective lens 2 as an output end of the laser light,
An optical system (not shown) for irradiating the laser beam to the disk recording surface via the objective lens 2 and guiding the reflected light to the photodetector 5 is formed. A monitor detector 22 that receives a part of the output light from the laser diode 4
Is also provided.

The objective lens 2 is held by a biaxial mechanism 3 so as to be movable in a tracking direction and a focusing direction. The entire pickup 1 can be moved in the disk radial direction by a thread mechanism 8. The laser diode 4 in the pickup 1 is driven to emit laser light by a drive signal (drive current) from a laser driver 18.

The information of the reflected light from the disk 90 is detected by the photodetector 5, converted into an electric signal corresponding to the amount of received light, and supplied to the RF amplifier 9. Before and after recording data on the disk 90, during recording, and the like, the amount of reflected light from the disk 90 varies more greatly than in the case of a CD-ROM.
An AGC circuit is generally mounted on the RF amplifier 9 due to the fact that it is greatly different from a D-ROM and a CD-R.

The RF amplifier 9 includes a current-voltage conversion circuit, a matrix operation / amplification circuit, and the like corresponding to output currents from a plurality of light receiving elements as the photodetector 5, and generates necessary signals by matrix operation processing. For example, it generates an RF signal as reproduction data, a focus error signal FE for servo control, a tracking error signal TE, and the like. The reproduction RF signal output from the RF amplifier 9 is supplied to a binarization circuit 11, and the focus error signal FE and the tracking error signal TE are supplied to a servo processor 14.

On the disk 90 as a CD-R or CD-RW, a groove (groove) serving as a guide for a recording track is formed in advance, and the groove has time information indicating an absolute address on the disk. The signal is wobbled (meandering) by the FM-modulated signal. Therefore, during the recording operation, tracking servo can be applied from the groove information, and the absolute address can be obtained from the wobble information of the groove. The RF amplifier 9 extracts wobble information WOB by a matrix operation process, and supplies this to the address decoder 23. In the address decoder 23, the supplied wobble information WOB
Is demodulated to obtain absolute address information, which is supplied to the system controller 10. PLL information
By injecting the information into the circuit, the rotational speed information of the spindle motor 6 is obtained, and is compared with the reference speed information to generate and output a spindle error signal SPE.

The reproduced RF signal obtained by the RF amplifier 9 is 2
The signal is binarized by the value conversion circuit 11 to be a so-called EFM signal (8-14 modulated signal), which is supplied to the encoding / decoding unit 12. The encoding / decoding unit 12 includes a functional part as a decoder during reproduction and a functional part as an encoder during recording. During reproduction, processing such as EFM demodulation, CIRC error correction, deinterleaving, and CD-ROM decoding are performed as decoding processing.
The reproduction data converted into the ROM format data is obtained. Further, the encoding / decoding unit 12 is provided with a disk 90
The sub-code extraction process is also performed on the data read from the sub-system, and the TOC and address information as the sub-code (Q data) are supplied to the system controller 10. Further, the encoding / decoding unit 12 generates a reproduction clock synchronized with the EFM signal by PLL processing,
The decoding process is executed based on the reproduced clock. The rotational speed information of the spindle motor 6 is obtained from the reproduced clock, and is compared with the reference speed information to generate a spindle error signal SPE. it can.

At the time of reproduction, the encoding / decoding unit 12
Accumulates the data decoded as described above in the buffer memory 20. As a reproduction output from the disk drive device, data buffered in the buffer memory 20 is read and transferred and output.

The interface unit 13 is connected to an external host computer 80,
The communication of recording data, reproduction data, various commands, and the like is performed with the communication device. Actually, SCSI, ATAPI interface and the like are adopted. At the time of reproduction, the reproduced data decoded and stored in the buffer memory 20 is transferred and output to the host computer 80 via the interface unit 13. Note that a read command, a write command, and other signals from the host computer 80 are supplied to the system controller 10 via the interface unit 13.

On the other hand, at the time of recording, the host computer 8
Recording data (audio data or CD-ROM data) is transferred from 0, and the recording data is sent from the interface unit 13 to the buffer memory 20 and buffered. In this case, the encoding / decoding unit 1
2 is a process for encoding CD-ROM format data into CD format data (when supplied data is CD-ROM data), CIRC encoding and interleaving, adding subcode, Executes EFM modulation and the like.

The EFM signal obtained by the encoding process in the encoding / decoding unit 12 is sent to the laser driver 18 as a laser drive pulse (write data WDATA) after a waveform adjustment process is performed in the write strategy 21. In the write strategy 21, recording compensation, that is, fine adjustment of the optimum recording power with respect to the characteristics of the recording layer, the spot shape of the laser beam, the recording linear velocity, and the like is performed.

In the laser driver 18, the write data WD
A laser drive pulse supplied as ATA is supplied to the laser diode 4 to perform laser emission driving. As a result, pits (phase change pits and dye change pits) corresponding to the EFM signal are formed on the disk 90.

APC circuit (Auto Power Control) 19
Is a circuit unit for controlling the output of the laser so as to be constant irrespective of the temperature while monitoring the laser output power by the output of the monitoring detector 22. The target value of the laser output is given from the system controller 10, and the laser driver 18 is controlled so that the laser output level becomes the target value.

The servo processor 14 determines the focus, tracking, thread, and spindle from the focus error signal FE and the tracking error signal TE from the RF amplifier 9 and the spindle error signal SPE from the encode / decode section 12 or the address decoder 20. Generate various servo drive signals and execute servo operation. That is, the two-axis driver 1 generates the focus drive signal FD and the tracking drive signal TD according to the focus error signal FE and the tracking error signal TE.
6 The two-axis driver 16 drives the focus coil and the tracking coil of the two-axis mechanism 3 in the pickup 1. As a result, a tracking servo loop and a focus servo loop are formed by the pickup 1, the RF amplifier 9, the servo processor 14, the two-axis driver 16, and the two-axis mechanism 3.

Further, in response to a track jump command from the system controller 10, the tracking servo loop is turned off and a jump drive signal is output to the two-axis driver 16 to execute a track jump operation.

The servo processor 14 further sends a spindle error signal S to the spindle motor driver 17.
A spindle drive signal generated according to the PE is supplied. The spindle motor driver 17 applies, for example, a three-phase drive signal to the spindle motor 6 in response to the spindle drive signal, and controls the CLV rotation of the spindle motor 6 or CA.
Execute V rotation. In addition, the servo processor 14 generates a spindle drive signal in response to a spindle kick / brake control signal from the system controller 10, and causes the spindle motor driver 17 to execute operations such as starting, stopping, accelerating, and decelerating the spindle motor 6.

The servo processor 14 generates a thread drive signal based on, for example, a thread error signal obtained as a low-frequency component of the tracking error signal TE, an access execution control from the system controller 10, and supplies the thread drive signal to the thread driver 15. I do. The thread driver 15 drives the thread mechanism 8 according to a thread drive signal. Although not shown, the thread mechanism 8 includes
A mechanism including a main shaft for holding the pickup 1, a thread motor, a transmission gear, and the like is provided.
, The required sliding movement of the pickup 1 is performed.

The various operations of the servo system and the recording / reproducing system as described above are controlled by a system controller 10 formed by a microcomputer. The system controller 10 executes various processes according to a command from the host computer 80. For example, when a read command requesting transfer of certain data recorded on the disk 90 is supplied from the host computer 80,
First, seek operation control is performed for the designated address. That is, a command is issued to the servo processor 14 to execute the access operation of the pickup 1 targeting the address specified by the seek command. afterwards,
An operation control necessary for transferring the data in the designated data section to the host computer 80 is performed. That is, data reading / decoding / buffering from the disk 90 is performed, and the requested data is transferred.

When a write command (write command) is issued from the host computer 80, the system controller 10 first picks up the pickup 1 at the address to be written.
To move. Then, the encoding / decoding unit 12 causes the data transferred from the host computer 80 to perform the encoding process as described above.
FM signal. Then, as described above, the recording is executed by supplying the write data WDATA from the write strategy 21 to the laser driver 18.

In the example shown in FIG. 12, the disk drive device 70 is connected to the host computer 80. As the disk drive device serving as the recording device and the reproducing device of the present invention, for example, an audio CD player, A host computer 80 such as a CD recorder
There may be a form that is not connected to the like. In this case, an operation unit and a display unit are provided, and the configuration of an interface unit for data input / output is different from that in FIG. That is, recording and reproduction are performed in accordance with the operation of the user, and a terminal unit for inputting and outputting audio data may be formed. Further, the display unit may be configured to display the track number and time (absolute address or relative address) during recording / reproduction.

Of course, various other examples of the configuration are also conceivable, for example, a recording-only device and a reproduction-only device.

4. Processing Example of Disk Drive Device Next, a processing example of the disk drive device will be described. FIG.
3 shows a flowchart of a process for determining the disc type (or area type) of the loaded disc 90 as an example of the process of the disc drive device. Each flowchart chart described below is an example of processing performed by the system controller 10.

The disc type or area type can be determined by taking in at least one sub-coding frame from the disk 90, and can be performed at various points. For example, disk 90
Can be read at any time, such as when reading the TOC information of the disc 90, during reproduction, or when accessing, etc. That is, since the subcode is recorded on the entire disk, it can be executed whenever it is necessary to determine the type of the recording density.

In the discrimination processing of FIG. 13, the system controller 10 first takes in at least one sub-coding frame as step F101. Then, in a step F102, it is determined whether or not the most significant bit of the ADR of the subcode is “1”. As described above, in the disc of this example, if the most significant bit of the ADR is “1”, it indicates a high-density disc (or high-density area). In such a case, the process proceeds to step F104, Various mode settings corresponding to high-density recording data are performed. If the most significant bit of ADR is “0”,
Since it indicates a standard disk (or standard density area), the process proceeds to step F103, and various mode settings corresponding to the standard density recording data are performed.

It is necessary to change the mode at a required portion between recording and reproducing standard density data and recording and reproducing high density data. Specific examples include setting the RF gain and equalizing characteristics of the RF amplifier 9, various servo gains such as focusing and tracking, and setting of operation coefficients at the time of seek due to different track pitches. It is necessary to switch between and. The mode setting in steps F103 and F104 is processing for setting these according to high-density data or standard-density data.

[0100] By such determination processing, the system controller 10 can accurately determine the recording density at a necessary point in time and can set a mode in accordance with the determination, so that accurate recording and reproduction can be performed in accordance with the disc type or area type. Operation can be realized. In particular, since it is based on subcode detection, it can be determined even when the pickup 1 is tracing any position on the disk 90. This is also
For example, this means that the standard density / high density can be determined without accessing a specific area on the disc such as the TOC area, and the mode of the reproducing system can be set in accordance with the determination. In other words, it is not necessary to access a specific area without knowing the disk type, and this does not cause a malfunction or a runaway condition due to a mismatch between the disk type and the mode setting at the time of access or the like. .

Next, a subcode decoding process will be described with reference to FIG. 14 as an example of a process of the disk drive device. At the time of reproduction, TOC read, or the like, every time a subcoding frame is fetched from the decoder 12, the system controller 10 causes the track number, point or index, and address (minute / second /
Frame or logical block address). That is, the track recorded on the disc is recognized by TOC read, and at the time of reproduction, the track number, index number, and address of the current reproduction position are recognized, and used for various processes such as time display and access control.

FIG. 14 shows a process of recognizing information indicated in a sub-coding frame every time a sub-coding frame is fetched and outputting the information to another processing system for use in the above-described various processes.

In the following description of the processing, "minute information" or "minute" is a general term for AMIN, MIN, and PMIN, and "second information" or "second" is ASEC, SE
C, PSEC. “Frame information” or “frame” means AFRAME, FRAME, AF
RAME is a generic term. Further, “LBA” is AL
BA, R-LBA, P-LBA.

First, the system controller 10 executes step F for the fetched sub-coding frame.
At 201, it is confirmed whether or not ADR = mode 1.
If the mode is 1, the system controller 10 recognizes the 8 bits of the track number (TNO) as a BCD code in step F203 and obtains the value. In step F204, the index (X) or point (P
OINT) is recognized as a BCD code and its value is obtained. Further, in step F205, the address, that is, each of 8 bits of "minute", "second", and "frame" is recognized as a BCD code, and values of "minute", "second", and "frame" are obtained. Then, in step F206, the track number, point value or index number, "minute"
Each value of “second” and “frame” is output as subcode data.

On the other hand, if ADR = mode 1, it is checked in step F202 whether ADR = mode 9. If the mode is not the mode 9, processing based on the contents of the other modes described above is performed. If ADR = mode 9, in step F207, the track number (TNO)
Is recognized as a binary code to obtain its value. In step F208, the 8 bits of the index (X) or the point (POINT) are recognized as a binary code, and the value is obtained. Further, in step F209,
The address of the sub-Q data is L in 24-bit binary
It recognizes that it is recorded as BA and obtains its value (in the case of the example of FIG. 8). Alternatively, the sub-Q data recognizes that the address is recorded by the BCD code as “hour”, “minute”, “second”, and “frame”, and obtains the value (FIG. 1).
1). Then, the track number, point value or index number, and address value obtained by the above processing are output as subcode data in step F210.

By performing the processing as described above, it is possible to appropriately obtain subcode information in both reproduction on a standard disk (standard density area) and reproduction on a high density disk (high density area). Can be.

When the disk drive 70 records data on a recordable disc 90 such as a CD-R or CD-RW, subcode information is also recorded. FIG. 15 shows a process related to recording of a subcode during a recording operation.

First, the system controller 10 determines in step F301 whether the disk 90 to be recorded is a high-density disk or a standard disk (whether the system operation is in the high-density mode or the standard mode). Is determined. If the disc is a standard disc, the processing of steps F302 to F306 is performed. That is, as a process of generating one subcode frame data,
In step F302, AD
Set the value of R. For example, ADR = mode 1 is set. In step F303, track number (TNO) data is generated using an 8-bit BCD code. Index (X) with 8-bit BCD code in step F304
Alternatively, data as a point (POINT) is generated. In step F305, the address, that is, "minute"
Each of 8 bits of “second” and “frame” is generated as a BCD code. Then, the data generated as described above is generated as data of one subcoding frame, and is output as subcode recording data. That is, the data is supplied to the encoding / decoding unit 12, processed as recording data, and recorded on the disk 90. The above processing is repeated for each sub-coding frame.

On the other hand, if the disc is a high density disc, the processing of steps F307 to F311 is performed. That is, as a process of generating one subcode frame data, the value of ADR is set as a code indicating the high-density mode in step F307. For example, ADR = mode 9 is set. Next, in step F308, the value of the track number (TNO) is generated as an 8-bit binary code. In step F309, the index (X) or point (PO
INT) is generated as an 8-bit binary code. Further, in step F310, a value as an address is generated as a value expressed as LBA in 24-bit binary (in the case of the example of FIG. 8). Alternatively, values as addresses are “hour”, “minute”, “second”, and “frame”, and each is generated by a BCD code (in the example of FIG. 11). Then, the data generated as described above is generated as data of one subcoding frame, and is output as subcode recording data. That is, the data is supplied to the encoding / decoding unit 12, processed as recording data, and recorded on the disk 90. The above processing is repeated for each sub-coding frame.

By performing the processing as described above, both the recording on the standard disk (standard density area) and the recording on the high density disk (high density area) are performed.
The subcode information can be generated and recorded appropriately.

The disc type and the area type in the processing of FIGS. 14 and 15 are determined by using subcode information (ADR).
It is not limited to the method using.

[0112]

As can be seen from the above description, according to the present invention, the 8-bit binary code is used for the track number information, the point information and the index information of the sub-code as the disc recording medium of the CD format, so that the conventional sub-code is used. The values that can be expressed as the track number, the track number indicated by the point information, and the index number can be expanded in the 8-bit range similar to the code format. This makes it possible to support a larger number of tracks and indexes on high-density disks, etc.
This has the effect of making it possible, and also has the effect of easily maintaining compatibility with standard discs, since the bit / byte assignment in the subcode format is not changed. Also, the value corresponding to the track number itself or the index number itself is
By limiting the binary code to the range of “01” to “9F”, the conflict with the previously set value of the special definition as a track number or a point is eliminated, thereby also maintaining compatibility and decoding / decoding subcode information. Maintaining the simplicity of encoding becomes easier.

Further, in the recording apparatus and the reproducing apparatus of the present invention, the recording or reproducing process of the subcode is performed according to the discrimination by the discriminating means, that is, the discrimination result is obtained for the track number information, point information and index information in the subcode. By performing encoding or decoding by determining whether the code is a binary code or a BCD code according to the above, it is possible to appropriately cope with both a standard disc and a high-density disc.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a disc type according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a frame structure of the disk of the embodiment.

FIG. 3 is an explanatory diagram of a sub-coding frame of the disc according to the embodiment;

FIG. 4 is an explanatory diagram of sub Q data in mode 1 of the disk of the embodiment.

FIG. 5 is an explanatory diagram of a TOC structure of the disk of the embodiment.

FIG. 6 is an explanatory diagram of an address value in mode 1 of the disk according to the embodiment;

FIG. 7 is an explanatory diagram of track number, point, and index values in mode 1 of the disk of the embodiment.

FIG. 8 is an explanatory diagram of sub-Q data in mode 9 of the disk of the embodiment.

FIG. 9 is an explanatory diagram of an address value in mode 9 of the disk of the embodiment.

FIG. 10 is an explanatory diagram of track number, point, and index values in mode 9 of the disk of the embodiment.

FIG. 11 is an explanatory diagram of another example of the sub-Q data in mode 9 of the disk of the embodiment.

FIG. 12 is a block diagram of a disk drive device according to an embodiment of the present invention.

FIG. 13 is a flowchart of a disk drive device type determination process according to the embodiment.

FIG. 14 is a flowchart of a subcode decoding process of the disk drive device of the embodiment.

FIG. 15 is a flowchart of a subcode encoding process of the disk drive device of the embodiment.

[Explanation of symbols]

1 pickup, 2 objective lens, 2 biaxial mechanism, 4
Laser diode, 5 photo detector, 6 spindle motor, 8 thread mechanism, 9 RF amplifier, 1
0 system controller, 12 decoder, 13 interface unit, 14 servo processor, 20 buffer memory, 21 write strategy, 23 address decoder, 70 disk drive device, 80 host computer, 90 disk

Claims (9)

[Claims] 1. A disc recording medium conforming to a CD format in which track number information is represented by an 8-bit BCD code as a subcode, wherein the track number information is recorded by an 8-bit binary code. A disc recording medium characterized in that the values of "01" to "9F" as the binary code values represent the track numbers themselves. 2. A disc recording medium conforming to a CD format in which point information indicating a content type of predetermined information is represented as an 8-bit BCD code as a subcode, wherein the point information is an 8-bit binary. A disc recording medium recorded by a code, wherein values of "01" to "9F" as binary code values are point information values indicating a track number itself. 3. A disk recording medium conforming to a CD format in which index information for subdividing a track is represented by an 8-bit BCD code as a subcode, wherein the index information is recorded by an 8-bit binary code. And a value of "01" to "9F" as a binary code value representing the index number itself. 4. A disk recording medium on which subcode recording conforming to the CD format is performed, wherein a track number information is recorded in an 8-bit BCD code in the subcode.
A disc recording medium on which subcode recording conforming to the D format is performed, wherein track number information is recorded in an 8-bit binary code in the subcode, and a binary code value of “01” to “01”
As a recording device capable of performing recording on both of the second disk recording media in which the value of “9F” represents the track number itself, the disk recording medium to be recorded is the first disk recording medium. Discriminating means for discriminating whether the disc is the disc recording medium or the second disc recording medium; and when discriminating the disc disc as the first disc recording medium, the track number is represented by an 8-bit BCD code. The sub-code data representing the information is generated, the recording of the sub-code is executed, and when the discrimination means discriminates the second disc recording medium, the track number information is represented by an 8-bit binary code. And control means for generating sub-code data and executing recording of the sub-code. 5. A disk recording medium on which subcode recording conforming to a CD format is performed, wherein point information indicating a content type of predetermined information in the subcode is recorded as an 8-bit BCD code. And a disk recording medium on which subcode recording is performed in accordance with the CD format, wherein the point information is recorded in an 8-bit binary code, and the binary code value is The values of “01” to “9F” are recording targets as a recording device capable of recording on both of the second disk recording media having the point information value indicating the track number itself. The disc recording medium is the first disc recording medium or the second disc recording medium. Discriminating means for discriminating whether the first disc recording medium has been discriminated by the discriminating means, and generating subcode data in which point information is represented by an 8-bit BCD code to record the subcode. Control means for generating subcode data representing point information by an 8-bit binary code and executing recording of the subcode when the discrimination means determines that the recording medium is the second disk recording medium. A recording device, comprising: 6. A disc recording medium on which subcode recording conforming to the CD format is performed, wherein index information for subdividing a track presenting a content type of predetermined information in the subcode is an 8-bit BCD code. And the first disk recording medium recorded by
A disc recording medium on which subcode recording conforming to the D format is performed, wherein the index information is recorded in an 8-bit binary code in the subcode, and "01" to "9F" Is a recording device capable of performing recording on both the second disk recording medium whose value indicates the index number itself, the disk recording medium to be recorded being the first disk Discriminating means for discriminating whether the disc is a recording medium or the second disc recording medium; and when discriminating the disc disc as the first disc recording medium, the index information is represented by an 8-bit BCD code. The sub-code data is generated and the recording of the sub-code is executed, 2
Control means for generating sub-code data in which index information is represented by an 8-bit binary code and executing recording of the sub-code, if the disc is determined to be a disc recording medium. apparatus. 7. A disc recording medium on which subcode recording conforming to the CD format is performed, wherein a track number information is recorded by an 8-bit BCD code in the subcode.
A disc recording medium on which subcode recording conforming to the D format is performed, wherein track number information is recorded in an 8-bit binary code in the subcode, and a binary code value of “01” to “01”
As a reproducing apparatus capable of reproducing both the second disk recording medium in which the value of “9F” represents the track number itself, the disk recording medium to be reproduced is the first disk recording medium. Discriminating means for discriminating whether the disc is the disc recording medium or the second disc recording medium, and when the discriminating means discriminates that the disc is the first disc recording medium, the disc is included in the reproduced subcode. The track number information is recognized as a track number value represented by an 8-bit BCD code, and when the discrimination means discriminates the track number information from the second disk recording medium, the track number information included in the reproduced subcode is read. Control means for recognizing a track number value represented by an 8-bit binary code. 8. A disk recording medium on which subcode recording conforming to a CD format is performed, wherein point information indicating a content type of predetermined information in the subcode is recorded as an 8-bit BCD code. And a disk recording medium on which subcode recording is performed in accordance with the CD format, wherein the point information is recorded in an 8-bit binary code, and the binary code value is "01" to "9F" are playback targets as a playback apparatus capable of playing back both of the second disk recording media having the point information value indicating the track number itself. The disc recording medium is the first disc recording medium or the second disc recording medium. A discriminating means for discriminating whether or not the first disc recording medium is determined by the discriminating means, the point information contained in the reproduced subcode is represented by a point value represented by an 8-bit BCD code; Control means for recognizing and, when the discrimination means discriminates the second disc recording medium, point information included in the reproduced subcode as a point value represented by an 8-bit binary code; A playback device comprising: 9. A disk recording medium on which subcode recording conforming to the CD format is performed, wherein index information for subdividing a track presenting a predetermined information type in the subcode is an 8-bit BCD code. And the first disk recording medium recorded by
A disc recording medium on which subcode recording conforming to the D format is performed, wherein the index information is recorded in an 8-bit binary code in the subcode, and "01" to "9F" Is a playback device capable of playing back both the second disk recording medium whose value indicates the index number itself, and the disk recording medium to be played is the first disk. Discriminating means for discriminating whether the disc is a recording medium or the second disc recording medium; and if the discriminating means discriminates that the disc is the first disc recording medium, index information included in the reproduced subcode. Is recognized as an index value represented by an 8-bit BCD code, and 2
Control means for recognizing the index information included in the reproduced sub-code as an index value represented by an 8-bit binary code when the disc is determined to be a disk recording medium of .