JP2003059193A - Method for recording identification data to digital data recording medium and recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the kinds of the identification data so as to decrease the length of the required identification data in an optical disk medium the recording data of which are managed by identification data in the unit of frames. SOLUTION: In this method, 4 kinds of frame management data is defined to identify 26 frames. Recording 4 kinds of the frame management data to the optical medium in a predetermined sequence, the length of the management data can be minimized while identifying the frames.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of recording identification data on a digital data recording medium and a recording / reproducing apparatus, and more particularly, to an optical disc or the like when recording or reproducing digital data on the recording medium. The present invention relates to a method of recording identification data for identifying a frame number when managing data on a frame-by-frame basis, and a recording / reproducing apparatus using this method.

[0002]

2. Description of the Related Art In a conventional optical disk device represented by a DVD, a plurality of concentric or spiral tracks are formed on a circular recording medium, and the tracks are divided in a circumferential direction at predetermined intervals. Area (sector) is formed, and data is recorded in this sector unit. The recording data of each sector is further divided into predetermined data (frames) and recorded together with special data (SYNC pattern) for identifying the order of the data. The above-mentioned SYNC pattern is from the reproduction binary data string from the recording medium,
Identify byte data delimiters (byte data synchronization)
It is also a special data pattern for

For example, Standard, which is a standard for DVD-RAM
According to ECMA-272 "120mm Rewritable DISK (DVD-RAM)", the recording data is 91 bytes (1456 channel bits) recording data and 2 bytes (32 channel bits) identification data.
93 bytes in total with (SYNC pattern) (1488 channel bits)
Form one frame with 26 frames (2
(418 bytes) is recorded as one sector. here,
The recording data of 91 bytes in one frame is EFM plus
According to the rules of the code (US Patent 5,696,505), the pre-modulation data is modulated at a conversion ratio of 8 bits before modulation and 16 bits after modulation. In addition, the 2-byte (32 channel bits) SYNC pattern included in each frame is classified into 8 types, and by identifying the SYNC pattern included in 1 to 3 consecutive frames, the frame number of the subsequent data ( Position in the sector) can be identified.

FIG. 7 is a diagram for explaining the recording order of the SYNC pattern on the conventional optical disc. The above-mentioned relationship will be described below with reference to FIG. As shown in FIG. 7A, a plurality of recording areas (sectors) are continuously arranged on the recording medium, and one sector is composed of 26 frames. Each frame is composed of a SYNC pattern of 32 channel bits and a data frame of 1456 channel bits, and 8 types of SYNC patterns are used. For convenience, each of these 8 types of SYNC patterns is referred to as SY0, SY1, SY2. , SY3, SY4, SY5, SY6, SY7. These eight types of SYNC patterns are SY0, SY5, SY1, SY5, SY2, SY5, SY3, SY5, from the beginning of the sector.
SY4, SY5, SY1, SY6, SY2, SY6, SY3, SY6, SY4, SY6,
SY1, SY7, SY2, SY7, SY3, SY7, SY4, SY7 are arranged in this order. FIG. 7 (b) shows the relationship between the SYNC pattern and the data frame expressed by 2 frames in each row and 13 rows.

Focusing on the arrangement of the SYNC pattern shown in FIG. 7B, SY0 is used only at the head of the sector.
At the beginning of the sector, data called Data ID, which is important for playing data, is inserted, so one SYNC
The position can be specified only by the pattern SY0. If two consecutive SYNC patterns are SY0 and SY5, the data frame following this SY5 is the data frame.
It is (1). Similarly, three consecutive SYNC patterns are S
If Y0, SY5, and SY1, the data frame following this SYNC pattern SY1 is data frame (2). Similarly, if two consecutive SYNC patterns are SY1 and SY5, the data frame following SY5 is data frame (3). Thereafter, by similarly identifying 1 to 3 consecutive SYNC patterns, it is possible to know the number of the subsequent data frame.

FIG. 8 is a diagram showing a specific example of the SYNC pattern in the conventional optical disk described with reference to FIG. As described above, the recording data is modulated by the EFM plus code. A feature of the EFM plus code is that when recording data is modulated, four states are defined and the modulation is performed by a state machine. That is, the modulation by the EFM plus code is performed so as to output 16 channel bits of data after modulation and the next state from the current state and input data of 8 bits before modulation. The codeword included in each state is unique, and the same codeword does not exist in two states.
During demodulation, the current 16-channel bit pattern and the next
The 8-bit recording data is demodulated from the state to which 16 channel bits belong. The SYNC pattern recorded at the same time as the data modulated by EFM plus also needs to comply with this modulation rule. That is, the SYNC pattern also has a state, and SY
If the state at NC pattern generation is state 1 or 2,
The SYNC pattern shown on the upper side of FIG. 8 is used, and if the state is 3 or 4, the SYNC pattern shown on the lower side of FIG. 8 is used. Further, either the Primary SYNC Code or the Secondary SYNC code is selected so as to suppress the DC signal component in each frame. For example, when it is desired to change the polarity of the DC component of the data string before and after the SYNC pattern, the Secondary SYNC code side is selected, and when the polarity is not changed, the Primary SYNC code is selected.

For any of the SYNC patterns shown in FIG.
Although it includes a pattern of "0100 0000 0000 0001 0001", the number of "0" (run length limit) sandwiched between "1" and "1" in the channel data is minimum as a feature of EFM plus code. Since the modulation is performed so that the number of data is 2, and the maximum is 10, the above-mentioned data pattern of 13 consecutive "0" s does not occur in normal data. Therefore, by identifying this data pattern, it becomes possible to determine the SYNC pattern in the reproduced binary data.

[0008]

[Problems to be Solved by the Invention] In recent years, EFM pl
Various modulation methods suitable for recording at higher density than us code have been proposed. As the prior art of this example, Japanese Patent Laid-Open No. 2000
The technique disclosed in Japanese Patent Publication No. 332613 or the like is known. According to this conventional technique, 4-bit recording data is converted into 6-bit channel data, and the converted run length limit is 1 at the minimum and 7 at the maximum. Also,
This conventional technique can be realized with a simple configuration because there are only four types of conversion tables required for modulation. Therefore, by using this modulation code, it is possible to create an optical disk medium having a high recording density with a simpler structure than the conventional one.

Therefore, the technique described in the above-mentioned publication has been changed to the conventional technique.
Consider constructing sector data by combining SYNC patterns. Then, in order to make the data recording efficiency equal to the conventional one, the data length of the SYNC part is set to 24 channel bits corresponding to 2 bytes before modulation, and as a special pattern for identifying the SYNC pattern in these 24 bits, for example,
An 18-bit data pattern of "01000 000000 0001001" is included. In this case, the remaining SYNC pattern portion is 6 bits, but it is necessary to keep the minimum run length limit even in this SYNC pattern, and it is necessary to prepare a plurality of SYNC patterns in order to suppress the DC component. . Furthermore, there are four types of SYNC patterns defined by the data pattern (state) immediately before the SYNC section.

In summary, the technique for forming sector data by combining the conventional SYNC pattern with the technique described in the above publication requires a total of 64 types of SYNC patterns, 8 types for each of SY0 to SY7. , It is impossible to realize with run-length limited 6-bit channel data.

The object of the present invention has been made in view of the above-mentioned problems, and a SY to be inserted for identifying a frame number.
A method of recording identification data on a digital data recording medium, which can realize an NC pattern with a smaller number of data patterns than before, and can minimize the recording area of the medium for the SYNC pattern, and a recording / reproducing apparatus using this method. To provide.

[0012]

According to the present invention, the above object is to combine data of a predetermined size and identification data for frame identification into one frame, and to combine L + 1 frames into one frame. Record data as sectors,
At that time, special identification data is assigned to the first frame in the sector, and one of M kinds of identification data different from the special identification data is assigned to the other frame in the sector and recorded, and during reproduction, A method of recording identification data on a digital data recording medium, which identifies which frame of L frames is identified by identification data of consecutive N frames to identify a frame number, The identification data is L ≦ M
^N (However, L, M, N are natural numbers, and M <L, N <L
This is achieved by selecting and configuring the smallest combination of M and N that satisfies the relationship (1). L, M, N
May be, for example, L = 25, M = 3, N = 3.

Further, the above-mentioned object is to record data of a predetermined size and identification data for frame identification into one frame, and to record data as one sector by combining L frames together. , One of M types of identification data is assigned to each frame and recorded, and at the time of reproduction, by identification data of N consecutive frames,
In a method of recording identification data on a digital data recording medium, wherein the frame number is identified by specifying which frame among the L frames, the identification data is recorded as L ≦ M ^N (where , L,
M and N are natural numbers, and can be achieved by selecting and configuring the smallest combination of M and N that satisfies the relationship of M <L and N <L. L, M, and N are, for example, L =
26, M = 3, N = 3.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a method of recording identification data on a digital data recording medium and a recording / reproducing apparatus using this method according to the present invention will be described below in detail with reference to the drawings. In the following description, the digital data recording medium is an optical disc.

FIG. 1 is a diagram for explaining the recording order of the SYNC pattern of the optical disc according to the first embodiment of the present invention.

As explained in the prior art shown in FIG. 7,
Also in the first embodiment of the present invention, the data on the recording medium is recorded in sector units as shown in FIG. 1A, and each sector has a plurality of SYNC frames. Also in the example of the embodiment of the present invention, one sector is the same in that one sector is composed of 26 frames and the total data of one sector is 2418 bytes. Further, since the embodiment of the present invention is premised on performing the modulation described in the above-mentioned Japanese Patent Laid-Open No. 2000-332613,
The 4-bit pre-modulation data corresponds to the 6-bit post-modulation data (channel bits). At the beginning of each SYNC frame, a SYNC pattern of 24 channel bits (corresponding to 2 bytes) exists, and following the SYNC pattern, 1092 channel bits (91B
data (corresponding to yte) is recorded. FIG. 1 (b) shows the relationship between the SYNC pattern and the data frame expressed by 2 frames in each row and 13 rows.

The first embodiment of the present invention uses only four types of SYNC patterns, SY0, SY1, SY2, SY3. The recording order of this SYNC pattern is shown in Fig. 1.
As shown in (b), SY0, SY1, SY1, SY1, SY2, SY1,
SY1, SY3, SY1, SY2, SY2, SY1, SY3, SY2, SY1, SY2,
SY3, SY3, SY3, SY2, SY2, SY2, SY3, SY2, SY3, SY1
It is the order of. If the recording order of the SYNC pattern is as described above, in order to specify the SYNC frame number from the SYNC pattern, it is sufficient to use a maximum of three consecutive SYNC patterns. That is, SY0 is used only for the data frame (0). And three consecutive SYNCs detected
If the pattern is SY1, SY1, SY1, the data frame following the last SY1 is data frame (3). Similarly, three consecutive SYNC patterns detected are SY2 and SY.
If 1, SY1, the data frame immediately after the last SY1 is the data frame (6). As described above, the SYNC pattern SY0 at the beginning of the sector can be located independently, and when SY0 is not included, three consecutive SYNC patterns can be used to identify the frame number in the sector. .

The arrangement of the SYNC pattern types as described above is
There are countless other than the example shown in FIG. The feature of the first embodiment of the present invention is that a special SYNC pattern is assigned only to the first frame in a sector, and the number of remaining frames is L.
Where M is the number of SYNC patterns to be assigned to a normal frame and N is the number of consecutive SYNC patterns required for frame number determination, the minimum M and N values that satisfy L <M ^N are used. To construct a frame.

FIG. 2 is a diagram showing a specific example of the SYNC pattern in the optical disc according to the first embodiment of the present invention described with reference to FIG. 1. Next, this will be described.

As mentioned above, the SYNC pattern as a whole is
It has 24 channel bits. Japanese Patent Laid-Open No. 2000-332613
The modulation rule disclosed in the official gazette is to perform modulation by defining four states inside. Therefore, the embodiment of the present invention defines four states of the SYNC pattern in accordance with the internal state transitioned by the data immediately before the SYNC pattern. Also, as a special pattern for identifying the SYNC pattern from the reproduced binary data string, “01000 00
17 channel bits of 0000 000100 "are used. This 17 channel bit pattern is set to the following state so that the channel bit next to the SYNC pattern is always" 1 "regardless of the recording data next to the SYNC pattern. By controlling, the code of the same polarity continues for 13 channel bits, and immediately after that, the code of the opposite polarity continues for 3 channel bits. In the encoding table shown in Japanese Patent Application Laid-Open No. 2000-332613, if the next recording data is 1 or less or 7 or more, S (k) = “2” is selected as the next state, and if not, otherwise. This can be realized by selecting S (k) = “3.” By performing such control, the number of bits of the fixed pattern can be reduced by 1 bit.

In the channel bit string generated by the encoding of Japanese Patent Laid-Open No. 2000-332613, since the code of the same polarity has a maximum of 8 channel bits in succession, it can be easily distinguished from normal data. Further, in the embodiment of the present invention, two kinds of SYNC patterns are defined so that the DC component of the reproduced signal can be suppressed, as in the conventional case. An example of the SYNC pattern satisfying such a condition is shown in FIG.

In FIG. 2, State0, State1, State2,
State3 is an internal state defined in Japanese Patent Laid-Open No. 2000-332613, which is determined by the modulation result of the data immediately before the SYNC pattern portion. Primary SYNC code and S
Either one of the econdary SYNC code is selected for DC suppression. That is, select the Primary SYNC code when changing the polarity of the DC component before and after the SYNC pattern, and select the Secondary SYNC when not changing the polarity of the DC component.
Select code.

For example, assume that the internal state of the modulation circuit when recording the SYNC pattern is State 0. The SYNC pattern to be recorded at this time is SY1, and the SYNC pattern when the polarity for DC suppression is not changed is “010001
001000 000000 000100 ”. The SYNC pattern is determined by the same procedure for other cases. As described above, the SYNC pattern of 24 channel bits has four types of SYNC patterns, SY0 to SY3, which can suppress DC. Can be defined.

However, the SYNC pattern shown in FIG. 2 is an example, and there are innumerable examples of SYNC patterns satisfying the conditions.

FIG. 3 is a diagram showing another specific example of the SYNC pattern in the optical disc according to the first embodiment of the present invention described with reference to FIG. 1. SYNC pattern strings different from those in FIG. It is an example which constituted the SYNC pattern of. Figure 2
The difference between the example shown in FIG. 3 and the example shown in FIG. 3 is that as a special pattern for identifying the SYNC pattern, in the example shown in FIG.
While the 17-channel bit pattern of “01000 000000 000100” was used, in the example shown in FIG.
The point is that the pattern of 16 channel bits of 000 000 100 "is used. By changing the SYNC pattern from FIG. 2 to FIG. 3, the difference between the special pattern and the pattern that can occur with normal random data is reduced, but The degree of freedom of the special pattern configuration is increased, and in particular, it is possible to reduce the proportion of “0101” patterns that are likely to cause a determination error during data reproduction.
Of course, in the case of FIG. 3 as well as in the case of FIG. 2, there are innumerable SYNC pattern sequences that satisfy the conditions.

In the first embodiment of the present invention described above, as described with reference to FIG. 1, data is recorded on the recording medium in sector units, and each sector has a plurality of SYNC frames. However, although it has been described that one sector is composed of 26 frames and the total data of one sector is 2418 bytes, the present invention also applies to the case where the data size or the number of frames in the sector is changed. The first embodiment can be applied.

FIG. 4 is a diagram for explaining the recording order of the SYNC pattern of the optical disc according to the second embodiment of the present invention. In the second embodiment of the present invention, frame identification is performed using three types of SYNC patterns.

Also in the case of the second embodiment of the present invention, as described in the prior art, the data on the recording medium is recorded in sector units as shown in FIG.
Each sector has a plurality of SYNC frames. One sector is composed of 26 frames, and the total data of one sector is 2418 bytes. Further, since the embodiment of the present invention is premised on performing the modulation described in the above-mentioned Japanese Patent Laid-Open No. 2000-332613, 4-bit pre-modulation data becomes 6-bit post-modulation data (channel bit). Correspond. 24 at the beginning of each SYNC frame
There is a SYNC pattern of channel bits (corresponding to 2 bytes), and 1092 channel bits (91 bytes) follow the SYNC pattern.
Data) is recorded. In Fig. 4 (b), this S
The relationship between the YNC pattern and the data frame is represented by 2 frames in each row and 13 rows.

The second embodiment of the present invention uses only three types of SYNC patterns, SY0, SY1 and SY2. The recording order of this SYNC pattern is, as shown in FIG. 4B, SY0, SY0, SY1, SY1, SY0, SY1, SY0, SY2, SY1,
SY1, SY1, SY2, SY1, SY0, SY0, SY2, SY2, SY0, SY2,
They are SY0, SY1, SY2, SY2, SY2, SY1, SY2. By setting the recording order of the SYNC pattern in this way,
In order to specify the number of the SYNC frame, three consecutive
You can use the SYNC pattern. That is, the detected SY
If the NC pattern is SY0, SY1, SY1, the data frame immediately after the last SY1 is the data frame (3), and if the detected SYNC pattern is SY1, SY0, SY1, the last
The data frame immediately after SY1 is the data frame (5). Repeat 3 for all data frames using the same procedure
The frame order within a sector can be specified from two consecutive SYNC patterns.

FIG. 5 is a diagram showing a specific example of the SYNC pattern in the optical disk according to the second embodiment of the present invention described with reference to FIG. 4, and this will be described next.

The SYNC pattern according to the second embodiment of the present invention is similar to that described in FIG.
There are four types (State0, State1, State2, Sta) according to the internal state at the time of modulation described in Japanese Patent Publication No. 0-332613.
te3) SYNC pattern, change polarity to suppress DC component (Primary SYNC code), do not change polarity (Secon
There are 8 kinds of SYNC patterns in total (dary SYNC code), and these SYNC patterns are defined for SY0, SY1 and SY2 respectively. For example, when the internal state of the modulation is State0 and the polarity for DC suppression is changed and SY2 is recorded, “010100 101000 000000 000” is used as the SYNC pattern.
Record 100 ”. In other cases, determine the SYNC pattern in the same way.

As described above, SY of 24 channel bits
Three types of SY, SY0 to SY2, which can suppress DC with an NC pattern
NC patterns can be defined. Note that the SYNC pattern shown in FIG. 5 is an example, and there are numerous examples of SYNC patterns that satisfy the conditions.

FIG. 6 is a diagram showing another specific example of the SYNC pattern different from that of FIG. 5 in the optical disc according to the second embodiment of the present invention described with reference to FIG. The difference between the example shown in FIG. 5 and the example shown in FIG. 6 is that the special pattern for identifying the SYNC pattern is “01000 000000 0” in the example of FIG.
The 17-channel bit pattern of "00100" is used, whereas the 17-channel bit pattern of "00100 000000 000100" is used in the example of FIG.
By changing the SYNC pattern from FIG. 5 to FIG. 6, the difference between the special pattern and the pattern that can occur with normal random data is reduced, but the proportion of “0101” patterns that easily cause a judgment error during data reproduction is reduced. Can be reduced.
Of course, in the SYNC pattern in the case of FIG. 6, as in the case of FIG.

The present invention can be configured by applying the above-described second embodiment even when the data size or the number of frames in a sector is changed, as in the case of the first embodiment. You can The difference between the first embodiment and the second embodiment is that SY0, which was allocated only to the first frame of a sector in the first embodiment, is allocated to other frames in the second embodiment. The point is that the frame number can be specified by three consecutive SYNC patterns including the first frame. That is, in the second embodiment of the present invention, the number of frames in a sector is L, the type of SYNC pattern assigned to each frame is M, and the number of consecutive SYNC patterns required for frame number determination is N. SYNC by using the minimum values of M and N that satisfy L <M ^N
It constitutes a pattern.

FIG. 9 shows the first embodiment of the present invention described above.
FIG. 10 is a block diagram showing the configuration of an optical disc device to which the second embodiment is applied, FIG. 10 is a diagram for explaining the operation of the SYNC addition circuit, and FIG. 11 is a diagram for controlling the operation of the SYNC detection circuit. 9 to 11, 11 is a host interface, 12 is a modulation circuit, 13 is a SYNC addition circuit, 14
Is a recording control circuit, 15 is an optical circuit section, 16 is a recording medium,
17 is a binary data reproduction circuit, 18 is a SYNC detection circuit,
Reference numeral 19 is a demodulation circuit, 20 is a SYNC pattern generation circuit, 21 is a selection circuit, 30 is a SYNC pattern detection circuit, 31 is a serial-parallel conversion circuit, and 32 is a changeover switch.

An optical disk device to which the embodiment of the present invention is applied is constructed as shown in FIG. 9. In FIG.
The host interface (host I / F) 11 controls data transfer between the optical disk device and a host computer such as a personal computer (not shown), and also performs error correction processing during data reproduction. The modulation circuit 12 converts the recording data on the recording medium into the modulation data according to a predetermined rule. The modulated data is the SYNC addition circuit 13
In, the SYNC pattern described above is inserted for each data frame. This data is converted into a pulse signal for optical recording in the recording control circuit 14. The optical circuit unit 15 is
It is composed of a light generating means, a light detecting means, an optical lens, and the like. After the electric signal from the recording control circuit 14 is converted into an optical signal in the light generating means, the recording medium is irradiated with light through the optical lens. The data is recorded on the recording medium 16.

Further, the optical signal reproduced from the recording medium 16 is converted into an electric signal by the light detecting means and transmitted to the binary data reproducing circuit 17. The recording medium 16 is a medium for recording target data. The binary data reproduction circuit 17
The recorded binary data string is reproduced by using the electric signal generated by the light detecting means. The obtained data string is SYNC
The detection circuit 18 detects the frame start position and the frame number, and removes the SYNC pattern. Finally, the demodulation circuit 18 performs the reverse process of the modulation circuit 12 to reproduce the recorded data. This data is sent to the outside via the host interface 11.

Next, referring to FIG. 10, the SYNC addition circuit 1
3 will be described. The SYNC addition circuit 13 includes a SYNC pattern generation circuit 20 and a selection circuit 21 therein. In FIG. 10, reference numeral 22 denotes the modulation circuit 12
The binary data after the modulation generated in
It means binary data in 6-bit units and a SYNC pattern generated by the modulation rule described in JP-A-00-332613.

In the SYNC addition circuit 13 shown in FIG.
The SYNC pattern generation circuit 20 selects and outputs an appropriate pattern from the SYNC patterns controlled by FIG. 2, FIG. 3, FIG. 5 or FIG. In order to make this selection, the SYNC pattern generation circuit 20 separately receives the frame number of data (total number of data), internal state, and DC control information from the modulation circuit 12. The selection circuit 21 receives the modulated channel data 10 input from the modulation circuit 12 to the SYNC addition circuit 13.
The data to be output is switched so that the SYNC pattern of 24 channel bits is inserted every 92 bits.

Next, referring to FIG. 11, the SYNC detection circuit 1
8 will be described. The SYNC detection circuit 18 is configured to include therein a SYNC pattern detection circuit 30, a serial-parallel conversion circuit 31, and a changeover switch 32. In FIG. 11, 33 is a binary data string reproduced by the binary data reproducing circuit 17. This data 33 is sent to both the SYNC pattern detection circuit 30 and the changeover switch 32. SYNC pattern detection circuit 30
Monitors the reproduced binary data string, outputs the corresponding frame number when the SYNC pattern generated by the SYNC pattern generation circuit 20 is detected, and 24 bits of the SYNC pattern string do not become the input data of the demodulation circuit 19. Thus, the changeover switch 32 is changed over. The data string from which the SYNC pattern has been removed is converted into 6-bit parallel data in the serial-parallel conversion circuit 31. The conversion timing (synchronization in 6-bit units) at this time is adjusted so that serial-parallel conversion is performed every 6 bits from the bit immediately after the SYNC pattern. The binary data string reproduced by the binary data reproducing circuit 17 is converted into 6-bit unit data as described above, and then demodulated by the demodulating circuit 19.

[0041]

As described above, according to the present invention, the number of frames in a sector is L, and SY is assigned to each frame.
When the number of NC patterns is M and the number of consecutive SYNC patterns required to determine the frame number is N, L <M
By configuring the SYNC pattern using the minimum values of M and ^N that satisfy ^N , the number of SYNC patterns can be minimized and the length of the SYNC pattern can be shortened.

[Brief description of drawings]

FIG. 1 shows an optical disc according to a first embodiment of the present invention.
It is a figure explaining the recording order of a SYNC pattern.

FIG. 2 is a diagram showing a specific example of a SYNC pattern in the optical disc according to the first embodiment of the present invention described with reference to FIG.

FIG. 3 is a diagram showing another specific example of the SYNC pattern in the optical disc according to the first embodiment of the present invention described with reference to FIG.

FIG. 4 shows an optical disc according to a second embodiment of the present invention.
It is a figure explaining the recording order of a SYNC pattern.

FIG. 5 is a diagram showing a specific example of a SYNC pattern in the optical disc according to the second embodiment of the present invention described with reference to FIG.

FIG. 6 is a diagram showing another specific example of the SYNC pattern in the optical disc according to the second embodiment of the present invention described with reference to FIG.

FIG. 7 is a diagram illustrating a recording order of SYNC patterns on a conventional optical disc.

FIG. 8 is a view of the conventional optical disc described with reference to FIG.
It is a figure which shows the specific example of a SYNC pattern.

FIG. 9 is a block diagram showing a configuration of an optical disc device to which the first and second embodiments of the present invention are applied.

FIG. 10 is a diagram illustrating an operation of a SYNC addition circuit.

FIG. 11 is a diagram for controlling the operation of the SYNC detection circuit.

[Explanation of symbols]

11 Host interface 12 Modulation circuit 13 SYNC additional circuit 14 Recording control circuit 15 Optical circuit section 16 recording media 17 Binary data reproduction circuit 18 SYNC detection circuit 19 Demodulation circuit 20 SYNC pattern generation circuit 21 Selection circuit 30 SYNC pattern detection circuit 31 Serial-parallel conversion circuit 32 changeover switch

Continued front page    (71) Applicant 000004329             Victor Company of Japan, Ltd.             3-12 Moriya-cho, Kanagawa-ku, Yokohama-shi, Kanagawa             Ground (72) Inventor Hideyuki Yamakawa             1099 Ozenji, Aso-ku, Kawasaki City, Kanagawa Prefecture             Ceremony company Hitachi Systems Development Laboratory (72) Inventor Shigeki Hira             1099 Ozenji, Aso-ku, Kawasaki City, Kanagawa Prefecture             Ceremony company Hitachi Systems Development Laboratory (72) Inventor Yukari Katayama             1099 Ozenji, Aso-ku, Kawasaki City, Kanagawa Prefecture             Ceremony company Hitachi Systems Development Laboratory (72) Inventor Takatoshi Kato             1099 Ozenji, Aso-ku, Kawasaki City, Kanagawa Prefecture             Ceremony company Hitachi Systems Development Laboratory (72) Inventor, J. Miyamoto             1-280, Higashikoigakubo, Kokubunji, Tokyo             Central Research Laboratory, Hitachi, Ltd. (72) Inventor Osamu Kawamae             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony Hitachi Digital Media Development Book             Department (72) Inventor Noh long work             70 Yanagicho, Saiwai-ku, Kawasaki City, Kanagawa Prefecture             Toshiba Yanagimachi Office (72) Inventor Yu Kashihara             70 Yanagicho, Saiwai-ku, Kawasaki City, Kanagawa Prefecture             Toshiba Yanagimachi Office (72) Inventor Toyoharu Gushima             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Takashi Ishida             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Jun Hayami             3-12 Moriya-cho, Kanagawa-ku, Yokohama-shi, Kanagawa             Local Victor Company of Japan, Ltd. (72) Inventor Toshio Kuroiwa             3-12 Moriya-cho, Kanagawa-ku, Yokohama-shi, Kanagawa             Local Victor Company of Japan, Ltd. (72) Inventor Takeshi Oki             3-12 Moriya-cho, Kanagawa-ku, Yokohama-shi, Kanagawa             Local Victor Company of Japan, Ltd. (72) Inventor Ken Miyazaki             3-12 Moriya-cho, Kanagawa-ku, Yokohama-shi, Kanagawa             Local Victor Company of Japan, Ltd. F-term (reference) 5D044 BC06 CC06 DE02 DE12 DE37                       DE49 DE57 DE58 EF10

Claims (11)

[Claims] 1. A combination of data of a predetermined size and identification data for frame identification into one frame, and L
Data is recorded as one sector by collecting +1 frames together, in which case special identification data is assigned to the first frame in the sector and different from the special identification data in other frames in the sector. One of M types of identification data is allocated and recorded, and at the time of reproduction, the identification number of consecutive N frames is used to identify which of the L frames the frame is, and identify the frame number. In the recording method of the identification data on the digital data recording medium, the identification data is L ≦ M ^N (where L, M and N are natural numbers, and the relationship of M <L and N <L is established). A method for recording identification data on a digital data recording medium, characterized in that it is configured by selecting a minimum combination of M and N satisfying the above conditions. 2. A frame including a predetermined size of data and identification data for frame identification, and L
Data is recorded collectively as one sector by collecting a plurality of frames, and at this time, one of M kinds of identification data is assigned to each frame and recorded, and at the time of reproduction, consecutive N
The identification data of each frame makes that frame L
In the method of recording identification data on a digital data recording medium, which identifies which frame among the individual frames and identifies the frame number, the identification data is L ≦ M ^N (where L, M , N are natural numbers, and are configured by selecting a minimum combination of M and N that satisfies the relationship of M <L and N <L), and recording the identification data on the digital data recording medium. 3. A method of recording identification data on the digital data recording medium according to claim 1, wherein L = 25 and M.
= 3, N = 3, a method of recording identification data on a digital data recording medium. 4. A method of recording identification data on the digital data recording medium according to claim 2, wherein L = 26 and M.
= 3, N = 3, a method of recording identification data on a digital data recording medium. 5. Identification for a digital data recording medium in which data is recorded in sector units, one sector is composed of 26 frames, and special data for identifying each frame is recorded in each frame as identification data. In the data recording method, when four kinds of identification data are used as the identification data and the identification data are SY0, SY1, SY2, SY3 respectively,
The recording order of the identification data in the sector is SY0, SY1, SY1,
SY1, SY2, SY1, SY1, SY3, SY1, SY2, SY2, SY1, SY3,
SY2, SY1, SY2, SY3, SY3, SY3, SY2, SY2, SY2, SY3,
A method for recording identification data on a digital data recording medium, which is SY2, SY3, SY1. 6. Identification for a digital data recording medium in which data is recorded in sector units, one sector is composed of 26 frames, and special data for identifying each frame is recorded in each frame as identification data. In the data recording method, when three kinds of identification data are used as the identification data and the identification data are SY0, SY1 and SY2, respectively, the recording order of the identification data in the sector is SY0, SY0, SY1, SY1. , SY
0, SY1, SY0, SY2, SY1, SY1, SY1, SY2, SY1, SY0, SY
0, SY2, SY2, SY0, SY2, SY0, SY1, SY2, SY2, SY2, SY
A method for recording identification data on a digital data recording medium, characterized by being 1, SY2. 7. The method for recording identification data on the digital data recording medium according to claim 5, wherein the first identification data of four types of identification data is 010010.
101000 000000 000100, 010100 001000 000000 00010
0, 001010 101000 000000 000100, 000010 101000 0000
00 000100, 010010 101000 000000 000100, 101010 101
000 000000 000100, 010101 001000 000000 000100, 01
Any of 0100 001000 000000 000100 is used, and as the second identification data, 000001 001000 000000 00010
0, 010001 001000 000000 000100, 000010 001000 0000
00 000100, 001001 001000 000000 000100, 101000 101
000 000000 000100, 010001 001000 000000 000100, 10
1001 001000 000000 000100, 100010 001000 000000 00
Any of 0100 is used, and as the third identification data, 010000 001000 000000 00010
0, 010000 101000 000000 000100, 001000 001000 0000
00 000100, 001000 101000 000000 000100, 101010 001
000 000000 000100, 101000 001000 000000 000100, 01
0000 001000 000000 000100, 010000 101000 000000 00
Any of 0100 is used, and as the fourth identification data, 000000 101000 000000 00010
0, 000000 001000 000000 000100, 000100 001000 0000
00 000100, 000101 001000 000000 000100, 100100 101
000 000000 000100, 100001 001000 000000 000100, 10
0000 001000 000000 000100, 100000 101000 000000 00
A method for recording identification data on a digital data recording medium, characterized in that any one of 0100 is used. 8. A method of recording identification data on the digital data recording medium according to claim 5, wherein the first identification data of four types of identification data is 010010.
100 100 000000 000100, 010100 000100 000000 00010
0, 001010 100100 000000 000100, 000010 100100 0000
00 000100, 010010 100 100 000000 000100, 101010 100
100 000000 000100, 010101 000100 000000 000100, 01
Any of 0100 000100 000000 000100 is used, and as the second identification data, 000001 000100 000000 00010
0, 010001 000100 000000 000100, 000010 000100 0000
00 000100, 001001 000100 000000 000100, 101000 100
100 000000 000100, 010001 000100 000000 000100, 10
1001 000100 000000 000100, 100010 000100 000000 00
One of 0100 is used, and as the third identification data, 010000 000100 000000 00010
0, 010000 100100 000000 000100, 001000 000100 0000
00 000100, 001000 100100 000000 000100, 101010 000
100 000000 000100, 101000 000100 000000 000100, 01
0000 000100 000000 000100, 010000 100100 000000 00
Any of 0100 is used, and as the fourth identification data, 000000 100100 000000 00010
0, 000000 001000 000000 000100, 000100 001000 0000
00 000100, 000101 001000 000000 000100, 100100 100
100 000000 000100, 100001 000100 000000 000100, 10
0000 000100 000000 000100, 100000 100100 000000 00
A method for recording identification data on a digital data recording medium, characterized in that any one of 0100 is used. 9. The method of recording identification data on the digital data recording medium according to claim 6, wherein the first identification data of three types of identification data is 010000.
001000 000000 000100, 010000 101000 000000 00010
0, 001000 001000 000000 000100, 001000 101000 0000
00 000100, 101000 101000 000000 000100, 101000 001
000 000000 000100, 010000 001000 000000 000100, 01
Use any of 0000 101000 000000 000100 and use 000000 101000 000000 00010 as the second identification data.
0, 000000 001000 000000 000100, 001010 101000 0000
00 000100, 001010 001000 000000 000100, 101010 001
000 000000 000100, 101010 101000 000000 000100, 10
0101 001000 000000 000100, 010100 001000 000000 00
Any of 0100 is used, and as the third identification data, 010100 101000 000000 00010
0, 010100 001000 000000 000100, 000010 001000 0000
00 000100, 000010 101000 000000 000100, 010010 101
000 000000 000100, 100001 001000 000000 000100, 10
0010 101000 000000 000100, 100010 001000 000000 00
A method for recording identification data on a digital data recording medium, characterized in that any one of 0100 is used. 10. The method for recording identification data on the digital data recording medium according to claim 6, wherein the first identification data of three types of identification data is 010000.
000100 000000 000100, 010000 100100 000000 00010
0, 001000 000100 000000 000100, 001000 100100 0000
00 000 100, 101000 100 100 000000 000 100, 101000 000
100 000000 000100, 010000 000100 000000 000100, 01
Any one of 0000 100100 000000 000100 is used, and as the second identification data, 000000 100100 000000 00010
0, 000000 000100 000000 000100, 001010 100100 0000
00 000100, 001010 000100 000000 000100, 101010 000
100 000000 000100, 101010 100100 000000 000100, 10
0101 000100 000000 000100, 010100 000100 000000 00
Any of 0100 is used, and as the third identification data, 010100 100100 000000 00010
0, 010100 000100 000000 000100, 000010 000100 0000
00 000100, 000010 100100 000000 000100, 010010 100
100 000000 000100, 100001 000100 000000 000100, 10
0010 100100 000000 000100, 100010 000100 000000 00
A method for recording identification data on a digital data recording medium, characterized in that any one of 0100 is used. 11. A unit for recording the identification data on the digital data recording medium according to any one of claims 1 to 10 as one frame on the digital data recording medium by combining the data and the identification data. When,
A digital data recording / reproducing apparatus comprising: a unit for identifying a frame number of a continuous N frame at the time of reading, based on the read identification data of the N frames.