JP2001243722A - Disk recording medium and disk drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To expand an address expression range while maintaining the interchangeability with a standard disk. SOLUTION: Expression range as an address value is expanded by representing a 'second' which is a 16-bit binary code by using minute information, second information and frame information in sub-codes or wobbling grooves as a disk recording medium of a CD format.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a disk recording medium in a CD format and a disk drive apparatus capable of recording or reproducing data in accordance with 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. As is well known, data such as music, video, computer data, and the like are recorded on such a CD-format disk, and addresses are recorded as subcodes. 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 disc, a pointer indicating the head or area of each track is described as so-called TOC information, and an address is also used as the pointer.

In the case of the CD format, the address on the subcode is expressed in 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.

[0004]

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 disc is put to practical use as a variation of the CD format disc, 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. As the address, minutes / seconds / frames are described by the 8-bit BCD code as described above.
By being able to handle up to 9 seconds and 74 frames, the address expression range is sufficient. However, in the case of a high-density disk, for example, if the capacity is doubled, recording for about 150 minutes is possible. However, in the address form of the 8-bit BCD code, a portion of 100 minutes or more cannot be completely expressed. Of course, there is no problem if the address format (subcode format) is developed exclusively for the high-density disk. However, in such a case, the compatibility between the standard disk and the high-density disk (and the corresponding disk drive device) cannot be obtained, which is preferable. Absent. Further, the address expression range can be extended by using an area other than minutes / seconds / frames in the subcode (for example, empty bits or bits that are not normally used). However, compatibility can be maintained, and address decoding processing of the drive device can be performed. This is also not desirable from the viewpoint that it does not lead to complication of the system.
For this reason, there is a demand for an address format that can support high-density discs while maintaining compatibility and using only the minute / second / frame area.

In a CD-R or CD-RW, a recording track is formed by a groove (groove), and the groove is wobbled (meandering) in accordance with a signal modulated based on address information. The address can be determined by extracting the information of the wobbling groove. The address obtained from the wobbling groove can correspond to a maximum of 99 minutes 59 seconds 74 frames in minutes / seconds / frame by the BCD code similarly to the subcode. Therefore, as in the case of the subcode, it is required to support a high-density disk.

[0007]

According to the present invention, there is provided a sub-code form and a groove address form which can cope with a high-density disc and maintain compatibility with a standard disc. Things.

Therefore, in the disk recording medium of the present invention, 24-bit address information is recorded as a subcode,
The address information is a disk recording medium conforming to a format represented by a BCD code value as 8-bit minute information, second information, and frame information.
In the area of the 8-bit minute information and the second information of the bit address information, the second information is recorded by a 16-bit binary code.

In the disk recording medium of the present invention, a recording track is formed by a groove on the recording medium, and 24-bit address information is recorded by wobbling of the groove.
BCD as bit minute information, second information, and frame information
A disc recording medium conforming to a format represented by a code value, wherein in the area of 8-bit minute information and second information of the 24-bit address information, 16
Second information is recorded in binary code of bits.

[0010] The disk drive device of the present invention corresponding to these disk recording media includes a discriminating means for discriminating the type of the loaded disc recording medium, and a first discriminating means.
If the disc type is determined to be a disc type (for example, a standard disc), 24-bit address information expressed by a subcode or a wobbling groove is recognized as minute information, second information, and frame information by an 8-bit BCD code, On the other hand, if the discriminating means determines that the disc type is the second disc type (for example, a high-density disc), the 24-bit address information is converted into 16-bit binary code second information and 8-bit BCD code frame information. Address recognition means to be recognized.

That is, since the minute information as an 8-bit BCD code is "99" at the maximum, it cannot be expressed for more than 100 minutes, but a total of 16 bits of minute / second express "second" in a binary code. As a result, the address expression range can be remarkably expanded, and it is possible to cope with a high-density disk. Considering the unit of “frame” in the CD format, the 8-bit “frame” in the address information is set as a BCD code to maintain compatibility.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a disk and a disk drive according to an embodiment of the present invention will be described in the following order. 1. Disk type 2. 2. Subcode and TOC 3. Wobbling groove 4. Other structural examples of subcode frame and ATIP frame 5. 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. 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, the addresses indicated in the subcodes can express a sufficient address value range even for a high-density disk, and the disk type / area type Is included. Further, as described above, in a recordable type disc such as a CD-R or CD-RW, the address can be determined by extracting the information of the wobbling groove. In this example, the address is obtained from the wobbling groove. The address can express a sufficient address value range even for a high-density disk.

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 block 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 and the like
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, the four bits Q1 to Q4 are used as control data, and are used for discrimination of the number of audio channels, emphasis, CD-ROM, digital copy availability, 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 example, 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, the address format based on the sub-Q data described later is a standard disc (or a standard density area).
In the high-density disc (or high-density area), the second is represented by a 12-bit binary code and the frame is represented by an 8-bit BCD code. It will be shown in the form.

The ADR value 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 in 8 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 (minutes), SEC (seconds), FRAME (frame) as the elapsed time in the lead-in area
Is shown. Q49 to Q56 are set to “00000000”. Furthermore, Q57 to Q64, Q65 to Q72, Q
PMIN, PSEC, P
FRAME is recorded, but this PMIN, PSEC,
The meaning of PFRAME 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.

If 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 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. 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 is recorded in 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 an absolute address is expressed by an AM.
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.

Next, when the mode 9 is indicated by the above 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. 7 shows the structure of the 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, similarly to FIG. 4A, FIG.
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 in FIG. 4A. However, in this case, the 24 bits of Q25 to Q48, that is, the area defined as MIN, SEC, and FRAME in FIG. 4A is replaced with the 16-bit SEC-B of Q25 to Q40.
It is an 8-bit FRAME of Q41 to Q48.
These SEC-B and FRAME are addresses in the lead-in area.

The 24 bits of Q57 to Q80, that is, the area defined as PMIN, PSEC, and PFRAME in FIG. 4A is replaced with the 16-bit PS of Q57 to Q72.
EC-B and 8-bit PFRAME of Q73-Q80
It has been. The PSEC-B and PFRAME are used as address pointers.

Address pointer (PSEC-B, PFR
AME) is the PMIN, PSE of FIG.
Like C and PFRAME, the meaning is determined by the value of POINT. That is, the value of POINT is “01”
When the value is "99", the value of the POINT indicates the track number. In this case, the address pointer (PSEC-
B, PFRAME), the address of the start point of the track of that track number is recorded.

When the value of POINT is "A2",
The address pointer (PSEC-B, PFRAME) indicates the address of the start point of the lead-out area. When the value of POINT is “A0” or “A
1], the address pointer (PSEC-B, PF
The RAME) does not actually indicate the address, but records the track number of the first track, discrimination of disc specifications, the track number of the last track, and the like as described above.
The 24 bits of (CB, PFRAME) may be handled as PMIN, PSEC, and PFRAME in FIG.

The TOC data as shown in FIG. 5 is also represented by the sub-Q data as shown in FIG. 7 (a). In FIG. 5, PMIN, PSEC and PFR are shown.
The address value shown as the value of AME is a 16-bit P
It is shown as SEC-B and 8-bit PFRAME.

In a program area and a 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. 7B 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.

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 ”is the same as in FIG. 4B. In this case, however, the 24 bits Q25 to Q48,
In (b), the area defined as MIN, SEC, and FRAME is replaced with 16-bit SEC-B Q25 to Q40 and Q25 to Q40.
It is an 8-bit FRAME of 41 to Q48. The SEC-B and FRAME are relative addresses in the track.

The 24 bits of Q57 to Q80, that is, the area defined as AMIN, ASEC and AFRAME in FIG. 4B is replaced with the 16-bit AS of Q57 to Q72.
EC-B and 8-bit AFRAME of Q73 to Q80
It has been. The ASEC-B and AFRAME are absolute addresses. 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.

As described above, when ADR = mode 9, the subcode is configured as described above. That is, in this subcode Q data, ASEC-B and AFRAME are arranged as areas for expressing absolute addresses, and SEC-B and FRAME are shown as areas for expressing relative addresses.
Is arranged. Further, PSEC-B, an address pointer indicating the beginning of the track or the lead-out area,
PFRAME is provided.

As these information, ASEC-B, SE
Each of CB and PSEC-B indicates a value of “second” constituting an address by a 16-bit binary code. AFRAME, FRAME, PFRA
The ME indicates the value of “frame” using an 8-bit BCD code, as in the example of FIG. That is, each address value is represented by "seconds" in binary code and "frames" in BCD code.

FIG. 8 shows a 16-bit binary code value of ASEC-B as an example of the value of "second" constituting the absolute address. According to the 16-bit binary code, as shown in FIG.
F "(= 2 ¹⁶ = 65535). Since up to 74 frames can be expressed by the BCD code, the range of the address value (time value) can be expressed up to 65535 seconds 74 frames.
That is, about 1092 minutes. If the time value of the current CD is 74 minutes (or 80 minutes), the range is about 13 times, that is, an address that can correspond to a high-density disc whose recording capacity is about 13 times the standard density. Expression range.

Although FIG. 8 shows ASEC-B as an example, the same applies to SEC-B.
The same applies to the case where the address is indicated by.

In this example, when ADR = mode 1 or mode 9, the subcode structure is as described above.
Therefore, in the case of the high-density disk, the high-order bit of the ADR = “1” indicates the high-density mode (high-density disk / high-density area), and the address expression range is large. This is sufficient for a high-density disc that has been manufactured. In other words,
By using the subcode structure of the CD format, a high-density disc can be realized.

Further, in both cases of ADR = mode 1 and mode 9, the frames (AFRAME, FRAME,
PFRAME) is represented by an 8-bit BCD code. A frame is a concept of a unique data unit defined by the CD format. Considering compatibility between a standard disc and a high-density disc, it is very preferable that the frame recording format is the same.

The high-density / standard-density mode is represented by the most significant bit of the ADR = “1”, so that a sub-code alone is used for a high-density disk (high-density area) or a standard disk (standard density). Area). Note that the definition of ADR is not limited to the above example. Alternatively, the high-density / standard-density mode may be determined based on information other than ADR in the subcode frame.

In the ADR mode, mode 1 and mode 8, mode 2 and mode 9,... Mode 5 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.

3. Wobbling groove

C which is generally called a compact disk
A D-type disc has a single spiral recording track that starts at the center (inner circumference) of the disc and ends at the end (outer circumference) of the disc. On a disk such as a CD-R / CD-RW on which data can be recorded on the user side, before recording, only a guide groove for laser light guide is formed on a substrate as a recording track. By applying a laser beam modulated with high power to the light, a change in reflectivity or a change in phase of the recording film occurs, and data is recorded according to this principle. CD-DA, CD-RO
In the case of a read-only disc such as M, there is no physical groove as a recording track.

In the CD-R, a recording film which can be recorded only once is formed. The recording film is an organic dye, and is a perforated recording using a high power laser. In a CD-RW in which a recording film that can be rewritten a large number of times is formed, the recording method is phase change recording, and data recording is performed as a difference between the reflectance in a crystalline state and the reflectance in an amorphous state. In terms of physical characteristics, the reflectivity of a read-only CD and a CD-R is 0.7 or more, while the CD-RW is about 0.2. -RW cannot be reproduced as it is. AG that amplifies weak signals
It is reproduced with the C (Auto Gain Control) function added.

In a CD-ROM, the lead-in area on the inner circumference of the disk is arranged over a range of a radius of 46 mm to 50 mm, and no pit exists on the inner circumference. CD-
As shown in FIG. 6, in the R and CD-RW, a PMA (Program Memory Area) and a PC are located on the inner side of the lead-in area.
A (Power Calibration Area) is provided.

A lead-in area and a program area used for recording actual data following the lead-in area are a CD.
The data is recorded by a drive device corresponding to -R or CD-RW, and is used for reproducing recorded contents in the same manner as CD-DA and the like. PMA uses a recording signal mode for each track recording,
The start and end time information is temporarily recorded. After all the planned tracks are recorded, a TOC (Table of contents) is formed in the lead-in area based on this information. PCA is an area for trial writing in order to obtain the optimum value of the laser power at the time of recording.

In a CD-R or CD-RW, a groove (guide groove) forming a data track is formed to be wobbled (meandering) for controlling a recording position and a spindle rotation. The wobble is formed based on a signal modulated by information such as an absolute address, and thus includes information such as an absolute address. That is, wobble information such as an absolute address can be read from the groove. Note that the absolute time (address) information represented by such a wobbled groove is represented by ATI.
It is called P (Absolute Time In Pregroove). As shown in FIG. 9, the wobbling groove is slightly sinusoidally meandering (Wobble), and its center frequency is 22.05 kHz.
In z, the meandering amount is about ± 0.03 μm.

The wobble information represented by the wobbling groove will be described below. CD-R / C
Regarding the wobble information detected by the push-pull channel from the groove of the D-RW, if the rotation of the spindle motor is controlled so that the center frequency becomes 22.05 kHz when the disk is rotated at the standard speed, the CD is just obtained.
Linear speed specified by the method (for example, 1.2m / s for standard density)
~ 1.4m / s). CD-DA, CD-RO
In M, it is sufficient to rely on the absolute time information encoded in the subcode Q. However, since this information cannot be obtained on a CD-R or CD-RW disc (blank disc) before recording, it is included in the wobble information. Rely on absolute time information.

One sector (ATI) as wobble information
The P sector) coincides with one data sector (2352 bytes) of the main channel after recording, and writing is performed while synchronizing the ATIP sector and the data sector.

The ATIP information is not directly encoded into wobble information, but is subjected to bi-phase (Bi-Phase) modulation and then to FM modulation as shown in FIG. This is because the wobble signal is also used for rotation control. That is, 1 and 0 are switched every predetermined period by bi-phase modulation, and the average number of 1 and 0 is set to 1: 1 so that the average frequency of the wobble signal at the time of FM modulation is set to 22.05 kHz. I have. Although detailed description is omitted, as wobble information, recording laser power setting information, disc type, and other information are also encoded as special information in addition to time information.

In this example, as in the case of the above-described subcode, the address information (absolute time information) recorded as the wobble information also uses the conventional format corresponding to the standard density and the high-density mode in which the address range is expanded. It is possible. FIG. 11 shows a configuration of one frame (ATIP frame) as wobble information. FIG. 11A shows an ATIP frame on a standard disc, and FIG. 11B shows an ATIP frame on a high-density disc.

First, an ATIP frame on the standard disk shown in FIG. 11A will be described. ATIP frame is 42
As shown in FIG. 11A, a sync (synchronization) pattern of 4 bits from the beginning, a pattern of 8 bits,
8 bit seconds, 8 bit frame, 14 bit CR
C. As in the case of the subcode described above,
The address value is expressed in seconds and frames. In the case of this ATIP frame, the address value is an absolute address value. Since the value of each of the minute, second, and frame is represented by an 8-bit BCD code, a maximum of 99: 59: 7
Up to four frames can be expressed.

On the other hand, an ATIP frame on a high-density disc is as shown in FIG. That is, a 4-bit sync (synchronous) pattern from the beginning, a 16-bit second, an 8-bit frame, and a 14-bit CRC are provided. In this case, as in the case of the sub-code in the high-density mode described above, the address value is expressed by a 16-bit second and an 8-bit frame. In the case of this ATIP frame, as in FIG. 11A, the value is an absolute address. And the second is 1
The value is represented by a 6-bit binary code, and the value of the frame is represented by an 8-bit BCD code. Therefore, as in the case of the above-described high-density mode subcode, up to 65535 seconds and 74 frames can be expressed.

In this example, the address expression range is sufficient for a high-density disk with a large capacity, even as wobble information as described above. In other words, a high-density disc can be realized using the wobble information structure of the CD format. Furthermore, the value of the frame in the wobble information is indicated by an 8-bit BCD code regardless of the high-density / standard-density mode. Therefore, this is preferable when compatibility between the standard disk and the high-density disk is considered.

The ATI obtained as wobble information
From the P frame, it is desirable to be able to identify whether the disc (area) is a high density disc (high density area) or a standard disc (standard density area). For this purpose, it is conceivable to make the sync pattern different between the standard mode ATIP frame and the high density mode ATIP frame. In other words, by enabling the high-density / standard-density mode to be determined based on what kind of sync pattern is detected as an ATIP frame, the disk drive device can immediately determine the mode and appropriately decode the absolute address. Will be able to Of course, the mode determination may be performed by another method.

4. Other examples of structure of subcode frame and ATIP frame By the way, the subcode frame and AT
In the IP frame, the address value is expressed as minutes / seconds / frame by an 8-bit BCD code in the standard mode, and expressed as seconds by a 16-bit binary code and a frame by an 8-bit BCD code in the high-density mode. It was made. In such a subcode frame and ATIP frame, the following structure can be further considered.

That is, in any case, the frame only needs to be able to represent up to 74 frames, and in fact, can be represented by 7 bits. That is, as can be seen from FIG. 6, the MSB does not become "1" in the 8-bit frame information. Therefore, when the MSB of the frame is set to “1”, it is possible to define such that the entire 24 bits representing the address represent completely different information instead of the address. For example, it is conceivable to record physical information of a disk, information for identifying high density / standard density, and the like.

In the high-density mode, 65535
Seconds (approximately 1092 minutes) can be expressed, but it may not be necessary to expand the address to 65535 seconds in view of the disk capacity. So, the 16-bit "second"
Can be used with different meanings.

The form of the sub-code frame in the high-density mode and the sub-code frame structure of the above-described modification can be applied to other areas such as an address portion in a CD-ROM header.

5. 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.

The disk 90 is loaded on the turntable 7, and is driven by the spindle motor 1 during recording / reproducing operation 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 the tracking direction and the 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 reflected light information 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.

As described above, CD-R, CD-R
A groove (groove) serving as a guide for a recording track is previously formed on the disk 90 as W, and the groove is wobbled (meandered) by a signal obtained by FM-modulating time information indicating an absolute address on the disk. It has become. Therefore, during the recording / reproducing operation, the tracking servo can be applied from the groove information,
An absolute address and various kinds of physical information can be obtained as wobble information of the groove. The RF amplifier 9 extracts wobble information WOB by a matrix operation process and supplies the wobble information WOB to the groove decoder 23.

The groove decoder 23 obtains absolute address information by demodulating the supplied wobble information WOB, and supplies the absolute address information to the system controller 10. In addition, by injecting groove information into the PLL circuit, rotation speed information of the spindle motor 6 is obtained, and by comparing the rotation speed information with reference speed information, a spindle error signal SPE is generated and output. Note that there are a standard density disc and a high density disc as the CD-R and CD-RW, but the groove decoder 23 switches the decoding method according to the density type from the system controller 10. Specifically, switching of a frame sync matching pattern is performed.

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. Note that the encoding / decoding unit 12 switches the processing method depending on whether the disk (or unit area) symmetrical for recording or reproduction has the standard density or the high density.

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 for the characteristics of the recording layer, the spot shape of the laser beam, the recording linear velocity, and the like, and the adjustment of the laser drive pulse waveform are 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 detects 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 unit 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.

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 or 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.

6. Processing Example of Disk Drive Device Next, a processing example of the disk drive device will be described. In the following description of the processing, “minute information” or “minute”
“AMIN”, “MIN”, “PMIN” in the sub-code or “minute” in the wobble information, and “second information”
Alternatively, “second” means ASEC, SE in the subcode.
C, PSEC, ASEC-B, SEC-B, PSEC-
It is a generic term for "seconds" in B or wobble information. Also, “frame information” or “frame” is an AFRAM
E, FRAME, AFRAME or “frame” in wobble information.

FIG. 13 shows a processing example of the disk drive device, in the case where a disk on which a subcode is recorded (that is, other than an unrecorded CD-R or CD-RW) is loaded, the disk type (or area) of the disk 90. 9 shows a flowchart of a process for determining the type. 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 location 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.

By such a determination process, 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 according to the disc type or the 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, an address decoding process from a subcode will be described with reference to FIG. 14 as a processing example of the disk drive device. At the time of reproduction, TOC read, or the like, the system controller 10 sets the address (minute / second / frame or second / frame) indicated each time a subcoding frame is fetched from the decoder 12.
Will be recognized. That is, AMIN, ASEC, A
FRAME, or absolute address by ASEC-B, AFRAME-B, MIN, SEC, FRAME, or S
EC-B, relative address by FRAME-B, PMI
N, PSEC, PFRAME, or PSEC-B, PF
The address pointer as the RAME-B is recognized at each point in time, and used for various processes such as recognition of the address being reproduced, time display, and access control. FIG. 14 shows a process of recognizing an address indicated in a subcoding frame every time a subcoding frame is captured and outputting the address to another processing system for use in the various processes.

First, the system controller 10 executes step F
At 201, it is confirmed whether or not ADR = mode 1.
If the mode is mode 1, the system controller 10 sets “minute” in steps F203, F204, and F205.
Each of the 8 bits of “second” and “frame” is recognized as a BCD code, and values of “minute”, “second”, and “frame” are obtained. Then, in step F206, the values of "minute", "second", and "frame" are output as address 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, it is recognized that "seconds" are recorded in the sub-Q data in 16-bit binary, and the value is obtained. That is, the binary code values as SEC-B and PSEC-B (in the case of FIG. 7A) or SEC-B
B and binary code values as ASEC-B (FIG. 7)
(Case (b)) is obtained as a value of “second”.

In step F208, the “frame” 8
Recognize the bits as a BCD code and get a “frame” value. In step F209, the values of “minute”, “second”, and “frame” are output as address data. "Minutes"
“Second” is obtained by converting “second” by 16-bit binary code into minutes and seconds.

By performing the processing as described above, in the case of a standard disk (standard density area), address data in the range of 0 minutes 0 seconds 0 frames to 99 minutes 59 seconds 74 frames is output. In the case of a high-density disc (high-density area), 0 minutes 0 seconds 0 frames to 1092 minutes 15
Address data in the range of 74 frames per second is output.
That is, address decoding can be realized in response to the extension of the address in the high-density disk or high-density area, and the address can be accurately extracted with compatibility according to the disk type or the area type.

FIG. 15 shows a processing example of the disk drive device, in which a disk type (or area type) of the disk 90 when a disk having a wobbling groove (ie, CD-R, CD-RW) is loaded. 5 shows a flowchart of a process of determining. This is an example corresponding to a case where discrimination of the disc type or the area type can be performed by taking in at least one ATIP frame from the disc 90. For example, ATI in high-density mode and standard-density mode
It is assumed that the sync pattern of the P frame is different.

As in the case of the above subcode, this determination process can be performed at any necessary time, for example, when the disc 90 is loaded, when the TOC information of the disc 90 is read, during reproduction, or when accessing. That is, since the groove is formed 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. 15, the system controller 10 first takes in at least one ATIP frame in step F301. And step F30
In step 2, the sync pattern of the ATIP frame is determined. Specifically, the groove decoder 23 is formed so that frame synchronization can be achieved by a plurality of sync patterns. Here, it is necessary to determine what sync pattern has been detected and the frame synchronization has been achieved. Become. If the sync pattern is the pattern set as the wobble information in the high-density mode, the process proceeds to step F304, where various modes corresponding to high-density recording data are set. If the sync pattern is the pattern set as the wobble information in the standard density mode, the process proceeds to step F303 to set various modes corresponding to the standard density print data.

The mode change between the recording and reproducing of the standard density data and the recording and reproducing of the high density data is as described above. By such a determination process, the system controller 10 can accurately determine the recording density at a necessary point in time, and can set a mode accordingly, thereby realizing an accurate recording / reproducing operation according to the disc type or the area type. it can. In particular, since it is based on wobble information detection, it can be determined even when the pickup 1 is tracing any position on the disk 90, and
Even unrecorded CD-Rs and CD-RWs can be discriminated. As in the case of the discrimination from the subcode, the standard density / high density can be discriminated 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 discrimination. Therefore, there is an effect of eliminating useless operation and preventing a malfunction or a runaway state.

Next, as an example of processing of the disk drive device, address decoding processing from wobble information is performed as shown in FIG.
Will be described. At the time of recording or reproduction, the system controller 10 can recognize the absolute address (minute / second / frame or second / frame) indicated every time an ATIP frame is fetched from the groove decoder 23. It can be used for various processes such as recognition of an address during reproduction, time display, access control, and the like. FIG.
Is the ATI every time an ATIP frame is captured.
This is a process of recognizing the address indicated in the P frame and outputting it to another processing system for use in the above various processes.

First, in step F401, the system controller 10 determines high density / standard density from the sync pattern of the fetched ATIP frame. If the mode is the standard density mode, the system controller 10 proceeds to steps F402, F403, and F404.
Each of 8 bits of “minute”, “second” and “frame” is B
Recognize as a CD code, and obtain the values of "minute", "second", and "frame". In step F405, the values of "minute", "second", and "frame" are output as address data.

On the other hand, in the case of the high-density mode, in step F406, it is recognized that "seconds" are recorded in the ATIP frame in 16-bit binary, and the value is obtained. In step F407, the 8 bits of “frame” are recognized as a BCD code, and the value of “frame” is obtained. In step F408, the values of "minute", "second", and "frame" are output as address data. "Minutes"
“Second” is obtained by converting “second” by 16-bit binary code into minutes and seconds.

By performing the processing as described above, the address can be obtained from the groove, and in the case of the standard disk (standard density area), 0 minutes 0 seconds 0 frames to 99 minutes 5
Address data in a range of 9 seconds and 74 frames is output. In the case of high density disc (high density area),
Address data in the range of 0 minute 0 second 0 frame to 1092 minute 15 second 74 frame is output. That is, address decoding can be realized in response to the extension of the address in the high-density disk or high-density area, and the address can be accurately extracted with compatibility according to the disk type or the area type.

Although the example of the embodiment has been described above, the configuration of the disk drive device, the processing example, the structure of the wobble information on the disk, the structure of the sub Q data, and the like are not limited to the above example, and various modifications are possible. Examples are possible.

[0120]

As can be seen from the above description, according to the present invention, as a disc recording medium of CD format, a sub-code or a region of minute information, second information and frame information in a wobbling groove is used as a 16-bit binary code. By expressing "seconds", the expression range as an address value can be sufficiently extended. Therefore, even if the data capacity of a high-density disk is remarkably expanded, sufficient address expression is possible while maintaining compatibility with the standard disk, and an appropriate and practical high-density disk is realized. There is an effect that can be. In the corresponding disk drive device of the present invention, an address is extracted in accordance with the extended address expression format, so that appropriate operation processing using the address (for example, display of recording / reproduction time) can be performed even on a high-density disk. , Address detection during recording / reproduction / access, etc.). In the 24-bit area used for minute information, second information, and frame information,
By expressing the extended address range, the address decoding process does not become complicated.

[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 sub-Q data in mode 9 of the disk of the embodiment.

FIG. 8 is an explanatory diagram of an address value in mode 9 of the disk of the embodiment.

FIG. 9 is an explanatory diagram of a wobbling groove.

FIG. 10 is an explanatory diagram of ATIP encoding.

FIG. 11 is an explanatory diagram of an ATIP frame according to 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 an address decoding process of the disk drive of the embodiment.

FIG. 15 is a flowchart of a type determination process of the disk drive device according to the embodiment.

FIG. 16 is a flowchart of an address decoding process of the disk drive 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 groove decoder, 70 disk drive device, 80 host computer, 90 disk

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D044 AB03 BC04 CC06 DE38 DE39 DE49 DE54 DE55 DE75 5D066 DA03 DA12 5D077 AA26 AA28 DC03 DD01 DE13 DF07

Claims (4)

[Claims] 1. A disc recording medium according to a format in which 24-bit address information is recorded as a subcode, and the address information is represented by a BCD code value as 8-bit minute information, second information, and frame information. A disk recording medium, characterized in that second information is recorded by a 16-bit binary code in an area of 8-bit minute information and second information of the 24-bit address information. 2. A recording track is formed by a groove on a recording medium, and 24-bit address information is recorded by wobbling of the groove, and the address information includes 8-bit minute information, second information, and frame information. A disc recording medium conforming to a format represented by a BCD code value as the above, wherein, in the area of the 8-bit minute information and the second information of the 24-bit address information, the second information is expressed by a 16-bit binary code. A disk recording medium, characterized by having recorded thereon. 3. A disc recording medium in which 24-bit address information is recorded as a subcode, and the address information conforms to a format represented by BCD code values as 8-bit minute information, second information, and frame information. On the other hand, in a disk drive device capable of performing a recording or reproducing operation, a discriminating means for discriminating a type of a loaded disc recording medium, and when the discriminating means discriminates a first disc type, The 24-bit address information is recognized as minute information, second information, and frame information based on an 8-bit BCD code. If the discriminating means determines that the disc type is the second disc type, the 24-bit address information is replaced with the second disc type. Second information by 16-bit binary code and 8-bit BCD
A disk drive device comprising: an address determining unit that recognizes code frame information. 4. A recording track is formed by a groove on a recording medium, and 24-bit address information is recorded by wobbling of the groove, and the address information includes 8-bit minute information, second information, and frame information. A disc drive device capable of performing a recording or reproducing operation on a disc recording medium conforming to a format represented by a BCD code value as a discriminating means for discriminating a type of a loaded disc recording medium; If the discriminating means determines that the disc type is the first disc type, the 24-bit address information is recognized as minute information, second information, and frame information by an 8-bit BCD code. If the type is determined, the 24-bit address information is replaced with a 16-bit byte. S information and an 8-bit BCD by recode
A disk drive device comprising: an address determining unit that recognizes code frame information.