JP2000311449A - Medium, method, and device for recording and method and device for reproduction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the recording medium where a recording area can effectively be used when new data are additionally recorded in the recording area and old and new data can be reproduced successively and accurately. SOLUTION: This recording medium is provided with a linking position indicating the head of an additional record at a specific position in an error correction block when information is recorded by error correction blocks. An error correction block 34 is composed of a specific number of sectors 20, which each consist of a specific number of sync frames H0 to H25, and the correcting capability for the specific sync frames is composed of (n) bytes and the linking position L is provided in a data area nearby a rear end position within (n) bytes from the rear end position of a specific sync frame in a specific sector.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a D
A recording medium capable of additionally recording new recording information consecutively with old recording information previously recorded on an information recording medium such as a high-density optical disk, such as a VD-RW (DVD-RW rewritable). It belongs to a method, a recording device, a reproducing method, and a reproducing device.

[0002]

2. Description of the Related Art Generally, in an information recording medium such as a DVD-RW capable of recording more than 1000 times with compatibility with a DVD-ROM, new recording information is overwritten later on an area where old recording information is recorded. In this case, since there is no linking area for connection, there is a shift in the frequency and phase relationship at the linking positions of the old recording information and the new recording information, and reading cannot be performed due to discontinuity.

[0003] Therefore, in an information recording method and apparatus for additionally recording new record information on this type of recordable information recording medium, when recording new record information contiguously with old record information, conventionally, At the connection between the record information and the new record information, an ECC (Error Correcting Coding) in error correction processing used in the old record information or the new record information is performed.
de) A concatenated area corresponding to an information amount corresponding to an error correction unit such as a block is provided. For example, a meaningless dummy Information or specified RF (Radio Freq
uency) signal is recorded, and then recording of the original new recording information is started. Here 1
The ECC block is composed of 16 sectors.

The reason for providing the connection portion is that when the new recording information and the old recording information recorded later are continuously reproduced, if the connection portion is not provided, the recording area of the old recording information and the new recording information are not reproduced. This is because each RF signal may be discontinuous at the boundary with the recording area, in which case the focus servo and tracking servo during reproduction may become unstable.

[0005] Also, the reason why a connection portion for one ECC block is provided and meaningless dummy information or the like is recorded therein is as follows.
In the conventional error correction processing, error correction is performed for each error correction unit. If new record information is recorded in the middle of the error correction unit, the old record information and the new record information are recorded after the new record information is recorded. When playing back information continuously,
This is because the error correction is not correctly performed on the leading portion of the new recording information in the error correction unit, and therefore, accurate continuous reproduction cannot be performed. In this regard, if it is determined in advance that meaningless dummy information or a predetermined RF signal is recorded for one ECC block in the connection area as described above, even if the old recording information and the new recording information overlap in the connection section. Therefore, even if both are destroyed, the information recorded in that portion is meaningless dummy information or a predetermined RF signal. Therefore, this portion is skipped without being reproduced and read from the next ECC block of the connecting portion. By reproducing the new record information, the old record information and the new record information can be reproduced.

Another reason for providing the connection area is as follows.
If new recording information is recorded consecutively to old recording information without providing a connection area, both the old recording information and the new recording information may be destroyed at the overlapped portion, but the range of destruction at that time may be incorrect. This is because if the number of correction units is exceeded, the destroyed recorded information may not be able to be repaired. As a solution to this problem, one disclosed in Japanese Patent Application Laid-Open No. 9-270171 has been proposed. This scheme has a capacity of, for example, about 32 kByte of a conventional error correction unit, and since this area is filled with information irrelevant to reproduction, the above-described high-density information that needs to record a large amount of information is used. For discs, etc., which is extremely inefficient and the recording area on the information recording medium cannot be used effectively, new recording information is added while effectively utilizing the recording area of the information recording medium. An object of the present invention is to provide an information recording method and apparatus capable of recording information and capable of accurately performing continuous reproduction of old recorded information and new recorded information.

[0007]

However, in the above-mentioned conventional linking method, of the data divided and recorded in the error correction unit, the linking portion is located near the rear end of a specific data portion. Stipulated. For this reason, at the time of reproduction, discontinuity of reproduced data occurs in a linking portion, and as a result, a deviation in frequency or phase occurs in reproduced data. Therefore, in order to eliminate this deviation, the reproducing apparatus starts the PLL operation, but it takes a certain time to return to the original state without this deviation. Therefore, in the conventional linking method,
Since the reproduced data cannot be reproduced during a period from the occurrence of a frequency or phase shift in the reproduced data due to the occurrence of linking until the deviation is eliminated, the amount of such non-reproducible data is large. Specifically, for example, 32kBy
In the configuration of the error correction unit composed of columns and rows having a data capacity of about te (bytes) (data configuration in each sector constituting one ECC block shown in FIG. 4), the linking position is the data area of the second sync frame H1. This is near the rear end (within PI), and before and after this position, the old data is linked to the new data, so that discontinuity occurs in the new and old data. Further, error correction of data using the above-described PI is performed in units of data for two sync frames. As a result, at the time of reproduction, a shift of the frequency and phase of the new data from the frequency and phase of the old data occurs at the joint of the new and old data. The reproducing apparatus starts the PLL operation so as to eliminate this deviation. However, a required time is required until the frequencies and phases of the new and old data are aligned (for example, the time for reproducing data of two sync frames). ). Therefore, the second sync frame H1
When the next horizontal row (third sync frame H2, fourth sync frame H3) is reproduced, the reproduced data still has a frequency or phase shift. At the time of reproduction after the fifth sync frame H3, such frequency and phase shifts are eliminated. Therefore, a total of two rows of data (first sync frame H0 to fourth sync frame H
3) There is a problem that data for a total of four sync frames cannot be reproduced. For example, while the correction capability of the PI sequence is up to 5 bytes, if the number of bytes from the linking position to the position of the next sync exceeds 6 bytes, for example, by the time the next sync is reached. Even if the PLL is pulled in, an error exceeding 6 bytes occurs due to a clock shift of the reproduction signal, extra pulses or missing bits, so that the PI column cannot be corrected and the PI column becomes an error. There was a problem of becoming.

Accordingly, the present invention has been made in view of the above-mentioned problems. (1) The configuration of the above-described error correction unit is similar to the data configuration in each sector constituting one ECC block shown in FIG. In addition, the point where there are a large number of rows where the data for two sync frames is one horizontal row, (2)
As a result of the discontinuity of the data generated in the linking portion, if the data in which the frequency or phase shift continues exceeds the correction capability of the PI column, the data cannot be corrected. From this, if the linking position is set so that the interval between the next syncs in the sync frame is within the range of the correction capability, and the PLL is pulled in until the next sync, a normal error can be generated without generating a correction error. As a result, the amount of unreproducible data can be reduced to zero as compared with the above-described conventional technique, thereby minimizing such an error amount and effectively utilizing the recording area of the recording medium. A recording medium that can additionally record new recording information while performing continuous reproduction of old recording information and new recording information accurately.
It is an object to provide a recording method, a recording device, a reproducing method, and a reproducing device.

[0009]

In order to solve the above-mentioned problems, the present invention provides a recording medium, a recording method, a recording apparatus, a reproducing method, and a reproducing apparatus having the following constitutions (1) to (15). provide. (1) As shown in FIGS. 1, 5 and 6, when recording predetermined information for each error correction block unit, a linking position indicating the head of additional recording is provided at a specific position in the error correction block. Each of the error correction blocks 34 includes a predetermined number of sectors (192 data sectors) 192, and each of the sectors 20 includes a predetermined number of sync frames (26 sync frames) H0 to H0. H
25, the error correction block has a correction capability of n bytes (n = 5 bytes) per the predetermined number of sync frames, and the linking position L is determined after the specific sync frame in the specific sector. Data area within n bytes from the end position (second sync H1 of the first sector)
(Between 87 and 88 bytes from the beginning of the data area). (2) As shown in FIGS. 1, 5, 6, and 10, when recording predetermined information for each error correction block unit, a linking position indicating the head of additional recording is specified in the error correction block. A recording medium provided at a position, wherein each of the error correction blocks is composed of a predetermined number of sectors, and each of the sectors is composed of a predetermined number of sync frames;
The correction capability of the error correction block is n bytes (n is a positive integer) per the predetermined number of sync frames, and the linking position is n bytes from the rear end position of the specific sync frame in the specific sector. The data area within is composed of m bytes (n = 5, m = 5), and the m bytes are at least m1 bytes (m1 = 2) of the linking area where the linking position L is provided, and A recording medium comprising m2 bytes (m2 = 3) of a pull-in area for pulling in a signal. (3) The recording medium according to claim 2, wherein a predetermined signal for pull-in is recorded in m2 bytes of the pull-in area. (4) When recording predetermined information for each error correction block unit, the linking position indicating the start of additional recording is determined by setting the correction capability of the error correction block to n bytes (n is a positive integer) per a predetermined number of sync frames. A recording method provided at a specific position in the error correction block, wherein a first step of detecting a specific sector in the error correction block of predetermined information to be additionally recorded on a recording medium; A second step of detecting a specific sync frame from a predetermined number of sync frames constituting the sector of the sector, and a data area within n bytes from a rear end position of the specific sync frame detected in the second step. A third step of additionally recording predetermined information as a linking position. (5) When recording predetermined information for each error correction block unit, the linking position indicating the start of additional recording is determined by setting the correction capability of the error correction block to n bytes (n is a positive integer) per a predetermined number of sync frames. A recording method provided at a specific position in the error correction block, wherein a first step of detecting a specific sector in the error correction block of predetermined information to be additionally recorded on a recording medium; A second step of detecting a specific sync frame from a predetermined number of sync frames constituting the sector of the sector, and m bytes (n bytes or less from the rear end position of the specific sync frame detected in the second step) n ≧ m), wherein m includes at least m1 and m2 bytes
A third step of additionally recording predetermined information by setting the position of the m1 byte of a byte as a linking area where the linking position is provided, and setting the position of the m2 byte as a pull-in area for pulling in a signal after linking; And a recording method comprising: 6. The recording method according to claim 5, further comprising: a fourth step of additionally recording attraction information different from predetermined information to be additionally recorded in the attraction area. (7) When recording predetermined information for each error correction block unit, the linking position indicating the start of additional recording is determined by setting the correction capability of the error correction block to n bytes per a predetermined number of sync frames (n is a positive integer). A recording device provided at a specific position in the error correction block, wherein the first means for detecting a specific sector in the error correction block of predetermined information to be additionally recorded on a recording medium; Means for detecting a specific sync frame from a predetermined number of sync frames constituting a sector of the sector, and a data area within n bytes from a rear end position in the specific sync frame detected by the second means And a third means for additionally recording predetermined information with a linking position as a linking position. (8) When recording predetermined information for each error correction block unit, the linking position indicating the head of the additional recording is determined by setting the correction capability of the error correction block to n bytes per a predetermined number of sync frames (n is a positive integer). A recording device provided at a specific position in the error correction block, wherein the first means for detecting a specific sector in the error correction block of predetermined information to be additionally recorded on a recording medium; A second means for detecting a specific sync frame from a predetermined number of sync frames constituting the sector of the sector, and m bytes within n bytes from a rear end position of the specific sync frame detected by the second means ( n ≧ m), m1, m
The position of the m1 byte of the m bytes composed of at least two bytes is defined as a linking area provided with the linking position, and the position of the m2 byte is defined as a pull-in area for pulling in a signal after linking. And a third means for additionally recording information. (9) The recording apparatus according to (8), further comprising: fourth means for additionally recording attraction information different from predetermined information to be additionally recorded in the attraction area. (10) A reproduction method for reproducing information in units of error correction blocks in which a linking position indicating the start of additional recording of predetermined information is provided at a specific position in the error correction block on a recording medium for each error correction block. A first step of reading information indicating a linking position recorded at a specific position on the recording medium, and a step of identifying information in an error correction block of predetermined information in order to reproduce an information signal recorded on the recording medium. A second step of detecting a particular sync frame; a third step of detecting a specific sync frame from a predetermined number of sync frames constituting the specific sector;
From the data area within n bytes (n is a positive integer) from the rear end position in the specific sync frame detected in the third step based on the information indicating the linking position read in the first step A reproducing method comprising: a fourth step of extracting a signal at a linking position; and a fifth step of reproducing the extracted signal at the linking position by optimizing a reproduction signal circuit. (11) A linking position indicating the beginning of additional recording of predetermined information is provided at a specific position in the error correction block on the recording medium for each error correction block unit, and the error correction block has a predetermined number of sync frames having a correction capability. A reproducing method for reproducing the information in units of error correction blocks, which is n bytes (n is a positive integer) per one bit, wherein an error correction of predetermined information is performed to reproduce an information signal recorded on the recording medium. A first step of detecting a specific sector in a block, a second step of detecting a specific sync frame from a predetermined number of sync frames forming the specific sector, and a step of detecting the specific sector. A third step of extracting a signal at a linking position from m-byte (n ≧ m) positions within n bytes from the rear end position in the specific sync frame; , M1, m2 bytes of the linking area in the m bytes, at least
4. A reproducing method comprising: a byte signal; and a fourth step of optimizing a reproduction signal circuit and reproducing the extracted signal at the linking position with respect to the m2 byte signal in the pull-in area. (12) A linking position indicating the start of additional recording of predetermined information for each error correction block unit is provided at a specific position in the error correction block of the recording medium, and the correction capability of the error correction block is a predetermined number of sync frames. A reproducing method for reproducing the information of the error correction block unit, which is n bytes (n is a positive integer), wherein a first step of reading information indicating a linking position recorded at a specific position on the recording medium; A second step of detecting a specific sector in an error correction block of predetermined information to reproduce an information signal recorded on the recording medium; and a predetermined number of sync frames constituting the specific sector. And a third step of detecting a specific sync frame from the linking position read in the first step. M bytes (n ≧ n) within n bytes from the rear end position in the specific sync frame detected at
a fourth step of extracting a signal at the linking position from the position of m), the m1 byte signal of the linking area in the m bytes, which is at least composed of m1 and m2 bytes, and the m2 byte signal of the pull-in area And reproducing the signal at the extracted linking position by optimizing a reproduction signal circuit. (13) A reproducing apparatus for reproducing information in units of error correction blocks in which a linking position indicating the head of additional recording of predetermined information is provided at a specific position in the error correction block on a recording medium for each error correction block. First means for reading out information indicating a linking position recorded at a specific position on the recording medium, and specifying information within an error correction block of predetermined information to reproduce an information signal recorded on the recording medium. Second means for detecting a specific sector, third means for detecting a specific sync frame from a predetermined number of sync frames constituting the specific sector, and information indicating a linking position read by the first means. From the data area within n bytes (n is a positive integer) from the rear end position in the specific sync frame detected by the third means based on A reproducing apparatus comprising: fourth means for extracting a position signal; and fifth means for reproducing the extracted linking position signal by optimizing a reproduction signal circuit. (14) A linking position indicating the start of additional recording of predetermined information is provided at a specific position in the error correction block on the recording medium for each error correction block unit, and the error correction block has a predetermined number of sync frames having a correction capability. A reproducing method for reproducing the information in units of error correction blocks, which is n bytes (n is a positive integer) per one bit, wherein an error correction of predetermined information is performed to reproduce an information signal recorded on the recording medium. First means for detecting a specific sector in a block, second means for detecting a specific sync frame from a predetermined number of sync frames constituting the specific sector, and detection by the second means M bytes (n ≧ n) within n bytes from the rear end position in the specific sync frame
third means for extracting a signal at the linking position from the position of m), the m1 byte signal of the linking area in the m bytes, which is at least composed of m1 and m2 bytes, and the m2 byte signal of the pull-in area And a fourth means for optimizing a reproduction signal circuit and reproducing the extracted signal at the linking position. (15) A linking position indicating the start of additional recording of predetermined information for each error correction block unit is provided at a specific position in the error correction block on the recording medium, and the correction capability of the error correction block is a predetermined number of sync frames. A reproducing method for reproducing the information of the error correction block unit, which is n bytes (n is a positive integer) per unit, wherein first means for reading information indicating a linking position recorded at a specific position on the recording medium; A second means for detecting a specific sector in an error correction block of predetermined information for reproducing an information signal recorded on the recording medium; and a predetermined number of sync frames constituting the specific sector. From the linking position read by the first means, the third means for detecting a specific sync frame from the first means. Means for extracting a signal at the linking position from m-byte (n ≧ m) positions within n bytes from the rear end position in the sync frame of the above-mentioned sync frame; Fifth means for optimizing a reproduction signal circuit and reproducing the extracted signal at the linking position with respect to the m1 byte signal in the linking area and the m2 byte signal in the pull-in area. Characteristic playback device.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Next, preferred embodiments of a recording medium, a recording method, a recording apparatus, a reproducing method, and a reproducing apparatus of the present invention will be described with reference to the drawings. In the following embodiment, an embodiment in which the present invention is applied to an information recording device for recording information on a DVD-RW will be described. CD-R
Needless to say, the present invention can be applied to a high-density recording medium such as W, DVD + RW, and next-generation DVD.

[Embodiment of Recording Format]
First, an embodiment of the recording format used in the present invention will be described. First, a general physical format when recording information is recorded on a DVD-RW and an error correction process on the recording information will be described with reference to FIGS. 1, 2, and 3. FIG.

First, an error correction process in a DVD-RW according to the present embodiment and an ECC block as an error correction unit in the error correction process will be described with reference to FIG.

In general, recording information recorded on a DVD-RW has a physical structure including a plurality of data sectors 20 shown in FIG. Then, in one data sector 20, from the top, ID information 21 indicating the start position of the data sector 20, and the ID information 2
ID information error correction code (I
ED) 22, spare data (for example, CPM) 23, a data area 24 for storing main data to be recorded, and an error detection code (EDC) 25 for detecting an error in the data area 24. Recording information to be recorded is constituted by a plurality of continuous data sectors 20.

Next, using this data sector 20, E
Processing for configuring a CC block will be described with reference to FIG. When constructing an ECC block using the data sector 20, as shown in FIG. 1B, first, one data sector 20 is divided horizontally into 172 bytes, and each divided data (this Is hereinafter referred to as a data block 33). At this time,
12 rows of data blocks 33 are arranged in the vertical direction.

A 10-byte ECC code (P) is assigned to each of the horizontal data blocks 33 arranged in the vertical direction.
I (Pality In) code) 31 to the data block 33
To form one correction block 34. At this stage, 12 correction blocks 34 to which the ECC internal code 31 is added are arranged in the vertical direction. Thereafter, this process is repeated for 16 data sectors for 20 times. As a result, a correction block 34 of 192 rows is obtained.

Next, the above-mentioned correction block 34 of 192 lines is used.
Are arranged in the vertical direction, this time, the correction block 34 of 192 rows is vertically divided from the beginning for each byte, and 16 ECCs are applied to each divided data.
An outer code (PO (Pality Out) code) 32 is added. The ECC outer code 32 is also added to the ECC inner code 31 in the correction block 34.

By the above processing, one ECC block 30 including 16 data sectors 20 is formed as shown in FIG. At this time, one ECC block 30
The total amount of information contained in is: (172 + 10) bytes × (192 + 16) rows = 378
56 bytes, and the data recorded in the actual data area 24 is 2048 bytes × 16 = 32768 bytes.

The ECC block 3 shown in FIG.
0, 1-byte data is indicated by “D #. *”. For example, “D1.0” indicates 1-byte data arranged in the first row and the zeroth column, and “D190.
“170” indicates 1-byte data arranged in the 190th row and the 170th column. Therefore, the ECC code 31
Are arranged in the 172nd to 181st columns, and the ECC outer code 32 is arranged in the 192nd to 207th rows.

Further, one correction block 34 is a DVD-R
It is recorded continuously on W. Here, as shown in FIG. 1B, the ECC block 30 is divided into ECC inner codes 31 and ECC.
The configuration including both of the CC outer codes 32 is shown in FIG.
1B, the data arranged in the horizontal (horizontal) direction is corrected by the ECC inner code 31, and the data arranged in the vertical (vertical) direction in FIG. 1B is corrected by the ECC outer code 32. It is. That is, E shown in FIG.
In the CC block 30, it is possible to perform double error correction in the horizontal (horizontal) direction and the vertical (vertical) direction,
It is configured so that error correction can be performed more strongly than error correction processing used for a conventional CD (Compact Disk) or the like.

More specifically on this point, for example,
One correction block 34 (as described above, one line of ECC
It contains a total of 182 bytes of data including the inner code 31, and is recorded continuously on the DVD-RW. ) Is up to 5 bytes, it can be corrected even if it is destroyed by a flaw or the like. However, if one row is destroyed by a flaw or the like in DVD-RW with 6 bytes or more, it can be corrected by the ECC internal code 31. Will be gone. However, even if all of the rows were destroyed by scratches or the like, when viewed from the vertical direction,
There is only one byte of data destruction for the ECC outer code 32 in the column. Therefore, if error correction is performed using the ECC outer code 32 of each column, even if all of one correction block 34 is destroyed, error correction can be performed correctly and accurate reproduction can be performed. However, in consideration of the occurrence of acquired scratches and the like, it is needless to say that if a row (horizontal) scratch becomes large, the next vertical row (horizontal) error will also occur, so that it is minimized. By the way,
This vertical error can be corrected even if there are 8 vertical columns (16 columns by erasure correction).

Next, the ECC block 3 shown in FIG.
0, the data sector 20 is a DVD
How the information is recorded in the RW will be described with reference to FIG. In FIG. 2, the data indicated by “D #. *” Corresponds to the data described in FIG.

When recording the ECC block 30 on a DVD-RW, first, as shown in FIG.
The blocks 30 are divided into 16 recording sectors 40 by being arranged in a row in the horizontal direction for each correction block 34 and interleaved. At this time, one recording sector 40 has 2366 bytes (3
7856 bytes ÷ 16), which includes the data sector 20 and the ECC code 31 or E
CC outer code 32 is mixed. However, at the beginning of each recording sector 40, ID information 21 (see FIG. 1A) in the data sector 20 is arranged.

Then, one recording sector 40
As shown in FIGS. 2B and 2C, is divided into data 41 of 91 bytes each, and a sink H is added to each.
After that, the recording sector 40 in this state is 8--
By performing the 16 modulation, one sync frame 42 is formed for each data 41. At this time, one sync frame 42 has a sync H ′ as shown in FIG.
And data 43. The amount of information in one sync frame 42 is 91 bytes × 8 × (16/8) = 1456 bytes.
Information is written to the D-RW disc. At this time, one recording sector 40 includes 26 sync frames 42.

This will be described with reference to FIG. The leading sector of an ECC block consisting of 16 physical sectors is configured as shown in FIG. That is, the row is composed of 186 bytes of 172 bytes of data, 10 bytes of PI and 4 bytes of sync, and is composed of 13 rows obtained by adding one row of PO to 12 columns. The sink is 2 from H0 to H25
26 bytes.

By recording information on a DVD-RW disc by constructing the physical format described above, if the information is reproduced by 8-16 demodulation and deinterleaving (see FIG. 2), the original Since the ECC block 30 can be restored and the amount of destroyed data blocks can be minimized, information can be reproduced most accurately by performing strong error correction as described above.

Next, referring to FIGS. 4 and 5, a description will be given of a position for additionally recording, that is, a linking position. FIG.
Is based on the ECC block conforming to the DVD-R standard shown in FIG. As shown in FIG. 4, here, the linking position L is defined as a range between 82 and 87 bytes from the beginning of the second sync H1 of the first sector of the ECC block. That is, the second sync frame sy2
Is a 2-byte second sink H1, 81-byte data,
Since it is composed of a 10-byte PI code (PI), linking is performed in the second to seventh bytes from the head of this PI. Before and after the linking position L, the phase or frequency of the recording data fluctuates (shifts). Therefore, if a clock is generated by a PLL or the like with respect to the previous data and the data is to be established, the PLL cannot be locked, and the data cannot be locked. Reading may not be possible.

If the linking position L is, for example, the position of the 82nd byte from the head of the second sink H1, 82-9
This means that 10-byte data up to the first byte cannot be read. That is, the width of the linking position L is 6 bytes, and the correction capability of the PI column is 5 bytes as described above.
Since there are up to bytes, the first row (that is, each data of the first and second sync frames sy1 and sy2) cannot be corrected. Next, the second row including the H2 sync (ie, each data of the third and fourth sync frames sy3 and sy4) is:
Until the sink position of the third sink H2 is reached, P
If the LL is locked, it can be read, but if there is a variation in frequency in addition to the phase, a signal of several tens of bytes is required for the PLL to pull in, and the third sink H2 cannot be detected. As a result, the data in the second row described above cannot be established, and this row cannot be corrected.

As described above, even if eight PI columns are broken, correction can be made by PO, so that data can be finally read. However, potentially having two rows of errors has a problem that it is vulnerable to an increase in errors due to acquired factors.

5 and 6 show the specifications of a next-generation high-density DVD, which is an example of the recording medium of the present invention. Here, the linking position L is 8 from the beginning of the data area of the second sync H1 in the first sector of the ECC block.
It is defined as a range between 7 and 88 bytes. That is, the width of the linking position L (the ringing area, FIG. 10)
M1) of (A) is 2 bytes. Since the second sync frame sy2 is composed of a 2-byte second sync H1, 81-byte data, and a 10-byte PI, the second sync frame sy2 extends from the beginning of the PI area of the second sync frame sy2 to the sixth to seventh bytes. Will be used for linking. Further, three bytes from the linking position L to the next third sync frame sy3 are allocated to the PLL pull-in area (using the 8th to 10th bytes from the head of the PI area, m2 in FIG. 10A). ). Also,
A high-frequency signal is superimposed on the PLL pull-in area so that PLL pull-in can be easily performed.

In the two-byte range of the linking position L, there are a number of linking positions due to differences in compatibility of recording apparatuses and recording conditions. Occurs, and the phase or frequency of the recorded data fluctuates (shifts) in any number of places. Therefore, when a clock is generated by a PLL or the like for the previous data and the data is to be established, the PLL can be locked at several places. Data may not be read. Suppose that the linking position L is a position from the beginning of the data area of the second sink H2 to, for example, the 87th byte, and the subsequent PLL pull-in area is from the 89th to 91st bytes. If the error signal is held and the PLL pull-in process in the PLL pull-in region is optimized, the data in the 55-byte region cannot be read out.
The next third sync frame can be accurately read. As described above, since the correction capability of the PI row is up to 5 bytes, this first row (that is, each data of the first and second sync frames sy1 and sy2) can also be corrected. As in the case shown in FIG. 4 described above, it is possible to prevent the two columns of the first and second rows from being error-corrected and data being destroyed.

The linking position L is described as being provided at the 87th to 88th bytes from the head of the data area of the second sync frame sy2. In addition to this, as shown in FIG. And any other sync frame can be provided at the 87th to 88th bytes from the beginning of the data area. In other words, the interval between the linking position and the next sync position is arranged at a position within the correctable number of bytes (here, 5 bytes of PI), and the PLL is pulled in during this period. Since signals can be read accurately, linking can be performed without any error.

[Embodiment of Information Recording Apparatus] Next, FIG.
6 is a physical format having the “embodiment of recording format” described with reference to FIG.
An embodiment of a recording apparatus according to the present invention for recording data on a recording medium will be described with reference to FIG. In the following embodiment, in a DVD-RW, pre-pits in which address information and the like on the DVD-RW are recorded are formed in advance on information tracks where recording information is to be recorded. Sometimes, pre-pits are detected in advance to obtain address information on the DVD-RW, and thereby, a recording position on the DVD-RW where the recording information is recorded is detected and recorded.

Hereinafter, a recording medium, a recording method,
Preferred embodiments of a recording device, a reproducing method, and a reproducing device will be described in detail with reference to the drawings. First, the configuration of the recording apparatus according to the present invention will be described with reference to FIG.

FIG. 7 shows a schematic configuration of an optical disk device as an embodiment to which the recording medium, the recording method, the recording device, the reproducing method, and the reproducing device according to the present invention are applied. In the embodiment of the present invention, a rewritable DVD-RW is cited as an example of an optical disk by employing, for example, MPEG2 as a compression / expansion technique. Further, in the configuration of FIG. 7, many parts usually provided in a so-called DVD device or the like are omitted.

In FIG. 7, the optical disk 1 is a recording type optical disk made of, for example, a phase change material. In this embodiment, for example, a so-called DVD-RW disk is used. In the DVD-RW disc, sectors (tracks) are spirally arranged in the disc, the rotation is controlled at a constant linear velocity (CLV), and one block is composed of continuous 16 sectors. The block is a processing unit (ECC block) for the error correction. The optical disc 1 is attached to a spindle motor 2 by a chucking mechanism (not shown).

The spindle motor 2 is driven to rotate by a driver 7 and rotates the optical disk 1 chucked by a chucking mechanism. The spindle motor 2 includes an FG generator and a rotation position signal detecting means such as a Hall element. The FG signal from the FG generator and the rotation position signal from the Hall element are fed back to the servo unit 8 via the driver 7 as a rotation servo signal.

The optical head 3 uses a semiconductor laser as a light source and forms a laser spot on a predetermined track of the optical disk 1 by a collimator lens, an objective lens, and the like.
In addition, focusing and tracking of a laser spot are performed by driving an objective lens with a biaxial actuator. The semiconductor laser is driven by a laser drive circuit, and the biaxial actuator is driven by a driver 7.

The key input unit 10 includes a plurality of keys operated by the user, and sends key operation input information from the user to the system controller 9. That is, from the key input unit 10, recording start, reproduction start, recording stop,
Various key operation input information for instructing stop of reproduction and the like can be input by the user.

The interface unit 13 is an interface for transmitting and receiving data to and from a computer or the like.
Interface).

The system controller 9 includes the key input unit 1
As key operation input information from 0, various types of key operation input information such as recording start, reproduction start, recording stop, reproduction stop, etc.
(The signal processing unit 5, the servo unit 8, the amplifier unit 4, the AV encoding / decoding unit 6, etc.). In addition, data is transmitted and received via the interface unit 13. For example, when the resolution of an image to be recorded, a high-speed scene such as a car race, or the like is selected, or when control data for setting with priority on the recording time is input from the key input unit 10 or the input terminal 12. The system controller 9 recognizes the control data, changes the recording time based on the recognition result, and allows an external user to select the setting.

Here, for example, when a signal is reproduced from the optical disk 1, a reproduction start command is issued from the key input unit 10, and the system controller 9 at this time responds to the reproduction start command by an amplifier (to be described later). The control unit 4 controls the servo unit 8 and the driver 7. That is, the optical disk 1
When a signal is reproduced from the system controller 9
First, the optical disk 1 is rotated and a laser spot is irradiated onto the optical disk 1, an address signal formed in advance on a signal track on the optical disk 1 is read, and a target sector (to be reproduced) is read from the address information. The optical head 3 is moved so that the laser spot is located on the target sector (track). After the movement to the target sector is completed, signal reproduction from the target sector is started.

The amplifier section 4 during reproduction of the optical disk 1 amplifies the RF signal reproduced from the target sector of the optical disk 1 by the optical head 3, and reproduces a reproduction signal, a tracking and focusing servo signal (tracking signal) from the RF signal. Error and focus error signals). Further, the amplifier unit 4 includes an equalizer that optimizes at least the frequency characteristics of the reproduced signal, a PLL (phase locked loop) circuit that extracts a bit clock from the reproduced signal and generates a speed servo signal, and a signal from the PLL circuit. A jitter generator for extracting a jitter component from a comparison between the bit clock and the time axis of the reproduced signal.
The jitter value generated by the amplifier unit 4 is sent to the system controller 9, the tracking and focusing servo signal and the speed servo signal are sent to the servo unit 8, and the reproduction signal is sent to the signal processing unit 5.

The servo section 8 receives the speed servo signal from the amplifier section 4 and the focusing and tracking servo signals of the optical head 3, and receives the spindle motor 2
, And based on each of these servo signals, performs servo control of a corresponding portion. More specifically, the servo unit 8 controls the PL of the amplifier unit 4.
Based on a speed servo signal generated by the L circuit according to the disk rotation speed and a rotation servo signal from the spindle motor 2, the spindle motor 2 is rotated at a predetermined rotation speed, that is, the optical disk is rotated at a predetermined constant speed. A rotation speed servo control signal for rotating at a linear speed is generated. Although details will be described later, in the present embodiment, a recording speed (recording data transfer rate) higher than the maximum data transfer rate at the time of internal compression / expansion is used.
The recording / reproducing of the optical disk 1 is performed at the reproducing speed (reproducing data transfer rate). Therefore, the servo unit 8 rotates the optical disk 1 at a constant linear speed that matches the recording speed / reproducing speed. A rotation speed servo control signal is generated. Further, the servo unit 8 generates an optical head servo control signal for the optical head 3 to accurately perform focusing and tracking on the optical disc 1 based on the focusing and tracking servo signals. The rotation speed servo control signal and the optical head servo control signal are sent to the driver 7. After this,
The recording speed (recording data transfer rate) of the optical disk 1 is called a recording rate, and the reproduction speed (reproduction data transfer rate) of the optical disk 1 is called a reproduction rate.

The driver 7 operates based on each servo control signal from the servo section 8. The driver 7 drives the spindle motor 2 to rotate in accordance with the rotation speed servo control signal from the servo section 8, and controls the optical head servo. The two-axis actuator of the optical head 3 is driven according to the control signal.
In the present embodiment, the driver 7 drives the spindle motor 2 in accordance with the rotation speed servo control signal, thereby rotating the optical disc 1 at a predetermined linear speed.
Further, the driver 7 drives the biaxial actuator of the optical head 3 according to the optical head servo control signal, so that focusing and tracking of the laser spot on the optical disk are performed.

The signal processing unit 5 at the time of reproducing the optical disc 1
The reproduction signal supplied from the amplifier unit 4 is A / D (analog / digital) converted, synchronization is detected from the digital signal obtained by the A / D conversion, and a so-called EFM + signal applied to the digital signal is converted. (8-1
6 modulated signals) to NRZ (Non Return to Zero) data, and further perform error correction processing.
The address data and reproduction data of the sector on the optical disk 1 are obtained. The address data and the synchronization signal obtained by the signal processing unit 5 are sent to the system controller 9. The details of the error correction processing and the like performed by the signal processing unit 5 will be described later.

Here, the reproduction data is, for example, MPEG
In the case of the data compressed and encoded at the variable transfer rate, the optical disk device of the present embodiment temporarily stores the data in, for example, a 64-Mbit D-RAM (track buffer memory 7), By controlling the writing / reading of the memory 7, the time variation of the variable transfer rate of the reproduced data is absorbed. Note that the track buffer memory used in the present embodiment refers to a buffer memory that temporarily stores compressed data, for example, for absorbing a variable transfer rate generally provided in DVD. It includes a buffer memory and a buffer memory used for MPEG encoding and decoding. The management of the storage capacity and storage area of the track buffer memory 7 and the write / read control are performed by the system controller 9 via the signal processing unit 5, for example.

The AV encoding / decoding section 6 at the time of reproducing the optical disk 1 converts the reproduction data supplied from the track buffer memory 7 into data obtained by compression-encoding, for example, MPEG2 and multiplexing audio data and video data. , The multiplexed compressed audio data and compressed video data are separated, and
2, the data is subjected to decompression decoding, further D / A (digital / analog) converted, and output from a terminal 11 as an audio signal and a video signal. The video signal output from the terminal 11 is transmitted to an NTSC (National Televisio) (not shown).
n System Committee) Processed by an encoder or the like and displayed on a monitor device, and the audio signal is sent to a speaker or the like (not shown) and emitted. Note that the speed of the decompression decoding by the AV encoding / decoding unit 6 at the time of this reproduction (the data transfer rate at the time of decompression decoding; hereinafter, referred to as the decompression rate) is the recording speed set at the time of recording, which will be described later. The expansion rate is set according to the mode. In other words, the AV encoding / decoding unit 6 is capable of performing expansion / decoding processing according to a plurality of expansion rates, determines the expansion rate in accordance with a recording mode set at the time of recording, and determines the expansion rate at that rate. Perform decompression decoding. The information of the recording mode is recorded on the optical disc 1 together with the recording data as control data, and the control data is read out when the optical disc 1 is reproduced and sent to the system controller 9. The decompression rate of the AV encoding / decoding unit 6 is set. The D / A conversion can be performed outside the AV encoding / decoding unit 6.

On the other hand, when performing signal recording on the optical disc 1, for example, a recording start command is issued from the key input unit 10, and the system controller 9 responds to the recording start command by the amplifier unit 4 and the servo unit 8. And the driver 7. That is, when performing signal recording on the optical disc 1, first, the optical disc 1 is rotated and a laser spot is irradiated onto the optical disc 1, and an address signal previously formed as a pre-pit on a signal track on the optical disc 1 is recorded. Is read, a target sector (track) to be recorded is found from the address information, and the optical head 3 is moved so that the laser spot is arranged on the target sector (track). The details of the address signal recorded in advance on the optical disc 1 will be described later.

From the terminal 11, audio and video signals to be recorded are input, and these signals are sent to the AV encoder / decoder 6. At the time of recording on the optical disk, the AV encoding / decoding unit 6 performs A / D conversion on the audio signal and the video signal, and converts the audio data and the video data into MPEG2 compression codes at a speed corresponding to a recording mode described later. And multiplexes them and sends them to the signal processing unit 5. Hereinafter, the speed of compression encoding (data transfer rate at the time of compression encoding) in the AV encoding / decoding unit 6 is referred to as a compression rate. That is, the AV encoding / decoding section 6 can perform compression encoding at a plurality of compression rates according to the recording mode.

The D-RAM 8 of 16 Mbytes stores A
This is a memory for temporarily storing data at the time of compression / expansion in the V encoding / decoding section 6. This D-RAM8
May have a capacity of 64 Mbytes. Also, the A / D conversion can be performed outside the AV encoding / decoding unit 6.

The apparatus according to the present embodiment can record and reproduce still image information and data such as program files on a computer in addition to video and audio information. In this case, data such as still image information and a program file is supplied from the interface unit 13, and the data is sent to the signal processing unit 5 via the system controller 9.

At the time of recording on the optical disk, the signal processing unit 5 adds an error correction code to the compressed data from the AV encoding / decoding unit 6 and data such as a program file via the system controller 9 to add an NRZ code. And EFM +
And further adds a synchronization signal supplied from the system controller 9 to generate recording data.

Here, the recording data is temporarily stored in the track buffer memory 7 and then read from the track buffer memory 7 at a reading rate corresponding to the recording rate on the optical disk 1. In addition,
The details of the management of the storage capacity and storage area of the track buffer memory 7 and the write / read control during this recording will be described later. The recording data read out from the track buffer memory 7 is subjected to a predetermined modulation process in the signal processing unit 5 and sent to the amplifier unit 3 as a recording signal. Track).

At this time, the system controller 9
A / D (analog / digital) converts and measures the jitter value from the amplifier unit 4, and changes the waveform correction amount in the amplifier unit 4 during recording according to the measured jitter value and asymmetry value. That is, when recording a signal on the optical disk 1, the amplifier unit 4 corrects the waveform of the signal from the signal processing unit 5 and sends the signal whose waveform has been corrected to the laser drive circuit of the optical head 4.

Next, the address of the data area on the optical disk 1 according to the embodiment of the present invention will be described below.

The optical disc 1 of the present embodiment is a DVD-RW disc that is compatible with DVD video, DVD audio, DVD-ROM, etc., and conforms to the DVD standard. Not only this DVD-RW, but also on a write-once or rewritable optical disk, sector addresses are usually recorded or formed on the disk in advance in order to enable address control during recording. However, in the conventional optical disc, the address recording is performed by wobbling the groove according to the frequency modulated based on the address data. However, in the case of the DVD-RW of the present embodiment, the address recording is more performed. In order to enable high-speed and high-density recording, a so-called LPP (land pre-pit) for forming a predetermined pit in a land portion on an optical disk together with a wobbling frequency signal of the groove.
It also uses an address method.

Here, when data is actually recorded on the optical disk 1, a sector address (hereinafter simply referred to as an LPP address) based on an LPP address which is recorded in advance on the optical disk 1 and is also a recording timing signal is used. Generally, a sector address (hereinafter, referred to as a data address) included in recording data to be actually recorded is made to match. As an example of data recording in which the LPP address and the data address match in this way, for example, there is a case where data reproduced from a normal DVD is completely recorded on a DVD-RW. In this case, data is continuously recorded on the DVD-RW disc, and therefore, the relationship between the LPP address and the data address can be made to match.

Next, the operation of the additional recording which is handled in the embodiment of the present invention will be described below. In the present embodiment, as shown in FIG.
One ECC block is composed of six data sectors (32 kBytes), and this ECC block is the minimum basic unit for recording and reproduction. Each data sector is composed of a sync frame having 26 syncs recorded in synchronism with an address composed of LPP and a sync timing signal for recording. Furthermore, DVD-R
In W, sector addresses are formed at predetermined intervals.

FIG. 8B shows data recorded with linking according to the LPP address of FIG.
FIG. 8C shows a process of recording the data of FIG. 8B. Here, as shown in FIG. 8B, for example, as in the above-described intermittent recording using the track buffer memory 7, continuous data is newly recorded after an area (data area) previously recorded. In such a case, the data at the joint between the pre-recording and the post-recording becomes discontinuous. Therefore, in order to minimize the influence of the data discontinuity, for example, as shown in FIG. 8C, 87 of the second sync frame (2rd sync frame) of the first sector (first sector of the physical sector) of the ECC block is used. The joint position is brought from the byte to the 88th byte. That is, the position of the joint is a linking position for performing linking. The second sync frame where the linking position L exists is a linking frame, and the leading sector including the linking frame is a linking sector.

As described above, when continuous data recording becomes discontinuous, linking is performed at that position in order to avoid the influence of the discontinuous portion. EC recorded before
Since the ECC block to be newly recorded is continuously connected to the C block, a linking position is set between the 87th and 88th bytes of the second sync frame of the first sector of the ECC block, and no data is lost by linking. In order to achieve this, the data recorded from the 87th to 88th bytes of the second sync frame (2nd sync frame) is recorded, for example, from the 88th byte so that some data may be duplicated. And overwrite as continuous data.

In the method shown in FIG. 8, the track buffer memory 7 is used to generate correction additional data (PI, PO) of an ECC block in advance, and thereafter, the previous EC
After the C block, data is recorded on the basis of the timing of the LPP sync signal (the sync shown in FIG. 8A) in the first and second sync frames sy1 and sy2 of the subsequent ECC block. When the 88-byte signal for overwriting with the sync signal is recorded, the data recording is temporarily stopped. Thereafter, when a predetermined amount of data to be recorded in the track buffer memory 7 has accumulated, the pickup 3 is positioned again in the ECC block,
LPP corresponding to the second sync signal of the ECC block
Is realized by detecting the timing of the second sync signal, and overwriting the 88-byte signal (linking position L) for overwriting again with reference to this timing, and continuously recording data thereafter. It becomes possible. When the method of FIG. 8 is realized, it is necessary to duplicate 88 bytes of data in order to perform the above-mentioned overwriting, and therefore, the overlapping data portion is subjected to duplication processing.

The description of the linking frame where the linking position L exists in FIG. 10 will be omitted while omitting common parts. In this sync frame, 86 bytes are normal data, 2 bytes of 87 and 888 bytes are linking positions, and 3 bytes of 89 to 91 bytes are PLL.
This is a pull-in area. As described above, according to this method, the correction additional data (PI, PO) of the ECC block is generated in advance using the track buffer memory 7 described above.
Thereafter, the first and second sync frames sy1 and sy2 of the subsequent ECC block following the previous ECC block are set to L.
Data is recorded based on the timing of the PP sync signal (the sync shown in FIG. 8A), and when the 88-byte signal for overwriting with the second sync signal is recorded, the data recording is started. Suspend. Thereafter, when a predetermined amount of data to be recorded in the track buffer memory 7 has accumulated, the pickup 3 is positioned again in the ECC block, and the timing of the second sync signal of the LPP corresponding to the second sync signal of the ECC block is adjusted. This can be realized by detecting and overwriting the 88-byte signal (linking position L) for overwriting again with reference to this timing and continuously recording the data thereafter. Since the 89th to 91st bytes have a function as a PLL pull-in signal, in order to make it easy for the PLL to pull in this 3-byte data, for example, by recording a 3T signal of the highest frequency in EFM modulation, the PLL pull-in is performed. Be more stable. Although the present invention does not specify the frequency of the PLL pull-in area, the modulation data to be recorded is such that the PLL pull-in operation at the time of reproduction is more stabilized by embedding a high frequency signal pattern in the modulation frequency. It is possible to record different data.

In the linking additional recording according to the method shown in FIG. 8, the linking position is not always the same due to the effects of compatibility between devices, changes in the environment, and the like. In some cases, the PLL circuit of the reproducing circuit is touched many times due to discontinuity in the phase and frequency before and after this recording, and it takes time for stabilization. In the worst case, the next sync from the linking part The PLL cannot pull in before the signal,
A problem occurs that the entire next sync frame cannot be read.

For this reason, as one embodiment, a management data area is provided inside the lead-in area of the optical disk 1, for example, in a so-called recording management area (RMA), and a linking position for recording is provided in this management data area. L (linking bitmap) is recorded, and at the time of subsequent reproduction, predetermined processing (change of response characteristics for linking) described later is performed based on the information indicating the linking position L of the management data area. And window switching processing), the data is basically not lost much, and the effect of data discontinuity due to the connection between recordings can be avoided. The information indicating the linking position L is stored in the management data area.
The address of the start and end positions of the data recording, or
It is recorded separately from the area for recording the interval between the start position and the end of data recording. Further, the information indicating the linking position L may be recorded not in the recording management area inside the lead-in area of the optical disc 1 but in an area called a border zone or an R zone which divides the recording area. In the data recording area, it is also possible to record simultaneously with the recording data as one of the control data.

This recording operation is performed according to the upper limit capacity (full) of the track buffer memory 7 in the optical disk apparatus shown in FIG.
And the lower limit capacity (empty) value, respectively,
The signal compressed by the encoding / decoding unit 6 is temporarily written into a 64 Mbyte track buffer memory 7 in a predetermined recording unit, and the operation of the optical head 3 is performed while managing the remaining capacity of the track buffer memory 7. To control. For example, at the time of recording on the optical disk 1, an error correction code, an address and a sync signal are added to the compressed data in the track buffer memory 7, and the laser power is modulated by the strategy circuit of the amplifier unit 4.
Is recorded on the optical disc 1 from the beginning.

Here, when the recording is continued, the track buffer memory 7 is determined by the difference between the transfer rate of the input recording signal and the transfer rate of the recording signal to be recorded on the disk.
When the capacity of the track buffer memory becomes the lower limit capacity (empty), the reading from the track buffer memory 7 is temporarily stopped,
The linking process on the optical disc 1 is performed, and the recording is temporarily stopped.

For this reason, in the optical disk apparatus shown in FIG.
A block management area is provided, and the byte corresponding to the linking position is set to, for example, "1" in the ECC block management area, so that the ECC block address of the linking position is recorded.

Next, when the remaining capacity of the track buffer memory 7 is restored and data can be read from the track buffer memory 7, the system controller 9
The linking process is started from the ECC block at the address corresponding to the linking position, and the recording is restarted. By repeating this operation, continuous recording is performed.

Next, when reproducing the optical disk 1 on which the above-described recording is performed, the following processing is performed. At the time of the reproduction, first, the management data area on the recording management area on the innermost circumference of the optical disc 1 is reproduced, and the system controller 9 reads the linking bitmap from the reproduction data in the management data area.

That is, the system controller 9 reads the addresses of the data recording start position and the recording end position of the linking bit map arranged in the recording management data (RMD) described in the recording management area. Recognize the range of the area where the recording was performed.

Next, the system controller 9 reads the linking bitmap, stores it in a linking position management area provided in the built-in RAM, and manages it. The system controller 9 converts the linking bit map stored in the linking position management area on the built-in RAM into an address position based on the address signal detected through the sync detection in the signal processing unit 5, and converts the converted address. The position is compared with the current address position, and it is calculated whether the address of the next ECC block to be reproduced contains linking.

Here, if the system controller 9 predicts that the ECC section to be reproduced next contains linking, it sends the information to the signal processing section 5 and the amplifier section 4 as described later. When the signal processing unit 5 and the amplifier unit 4 receive the linking information, based on the information,
Processing for interpolation, such as changing response characteristics for linking and switching windows as described below, is performed. The details of the processing for interpolation in the signal processing unit 5 will be described later.

By the way, at the time of reproduction, the linking position can be known by reading the information in the above-mentioned management data area. Sometimes, the data of those bits cannot be reproduced.

From the above, in the present embodiment,
By taking special measures as described below for the data (signal) corresponding to the linking position, more reliable reproduction is realized.

As a first countermeasure against the data at the linking position L, a predetermined processing as described below is performed on a reproduction signal corresponding to the linking position L, thereby realizing stable reproduction processing. A method is conceivable.

That is, since recording is performed intermittently at the linking position L, the signals before and after the reproduced signal corresponding to the linking position L include the amplitude, frequency, phase (temporal timing), asymmetry, The quality (jitter etc.) may have changed. At the linking position, missing bits or unnecessary bits may occur.

Therefore, in the optical disk device of the present embodiment, for example, (1) the response characteristic of the PLL circuit is changed according to the timing signal for the reproduction signal corresponding to the linking position during the reproduction of the optical disk. For example, PLL
Is held at the previous value in the signal before the linking area. (2) The slice level for binarizing the reproduced RF signal is held at the previous value of the signal before the linking area. (3) The response characteristic of an AGC (automatic gain control) circuit for adjusting the gain of the reproduced RF signal is held at a value before the linking area. (4) The equalizing characteristic of the equalizer (EQ) for adjusting the frequency characteristic of the reproduction RF signal is held at the previous value in the signal before the linking area. (5) Since there is a possibility that no data exists at the linking position, as in the case of a defect, for example, the drive output of the servo system is held at the previous value in the section before the linking area. And so on. Next, with respect to the reproduction signal in the PLL pull-in area after the linking position, for example, (1) the response characteristic of the PLL circuit is changed (for example, the response speed is increased) in accordance with the timing signal. (2) Changing the slice level for binarizing the reproduced RF signal (for example, changing the voltage of the slice level by inserting a transient waveform) or changing the response characteristics of the filter (feedback type low-pass filter) (For example, increase the frequency characteristics and response speed). (3) The response characteristics of an AGC (automatic gain control) circuit for adjusting the gain of the reproduced RF signal are switched (for example, the response speed is increased). (4) Change the equalizing characteristics of an equalizer (EQ) for adjusting the frequency characteristics of the reproduced RF signal. By performing such processing, stable reproduction processing is realized.

If a process such as always improving the response characteristics as described above is performed on a normal reproduced signal, the performance may be deteriorated when, for example, an optical disk having a fingerprint or a scratch is reproduced. The predetermined processing of the coping method described above is performed only in the signal section corresponding to the linking position and the PLL pull-in position. The optical disc device performs the above-described switching of the response characteristic for the same purpose, for example, immediately after seeking to a target track, immediately after switching of recording / reproduction, or when a scratch or a fingerprint occurs. Therefore, this circuit configuration can be applied to the reproduction signal section corresponding to the linking position.

FIG. 9 shows an essential configuration of an optical disk apparatus according to an embodiment of the present invention for realizing the above-described coping method. In the example of FIG. 9, the amplifier unit (preamplifier) 4, signal processing unit 5, servo unit 8, and system controller 9 of FIG. 7 are extracted and the internal configuration thereof is shown.

In FIG. 9, the optical head (PU) 3
Is input to the AGC circuit 41 of the amplifier unit 4. The AGC circuit 41 automatically adjusts the reproduction RF signal from the optical head 3 to a predetermined signal level, and sends the reproduction RF signal after the gain adjustment to the equalizer 42. The equalizer 42 controls the reproduction R from the AGC circuit 41.
The frequency characteristic of the F signal is raised and sent to the binarization circuit 43. The binarization circuit 43 binarizes the reproduced RF signal from the equalizer 42 at a predetermined slice level, and
The value reproduction signal is sent to the PLL circuit 44. PLL circuit 44
In this case, the PLL is locked by the binary reproduction signal. The binary reproduced signal thus PLL-locked is sent to the signal processing unit 5.

The binary reproduced signal input to the signal processing unit 5 is first sent to the sync detector 51. In the sync detector 51, the above-described FIG.
The sync H ′ shown in (D) is detected, and a timing signal based on the sync is sent to the address detector 52 and the linking timing generator. Also, the address detector 52
, The reproduced signal via the sync detector 51 is also sent. The address detector 52 decodes the address included in the reproduction signal at the timing of the sink, and sends the decoded address to the system controller 9. The reproduction signal via the address detector 52 is sent to the data processor 53. The data processor 53 demodulates the reproduced signal, which is a digital signal, into an EFM + signal and decodes it into NRZ data, and further performs error correction processing.
Generate playback data.

The ECC block address management section 91 of the system controller 9 manages the address of each ECC block on the basis of the address from the address detector 52, and the data processor of the signal processing section 5 uses the address of each ECC block. The data processing in ECC block unit 53 is controlled. Further, the linking position management unit 92 of the system controller 9
A timing signal corresponding to the linking position in the ECC block is generated based on the address from the ECC block and information on the linking position extracted from the reproduction signal. The timing signal corresponding to the linking position in the ECC block is sent to the linking timing generator 54 of the signal processing unit 5.

The linking timing generator 54 generates a timing signal based on the sync supplied from the sync detector 51 and a timing signal corresponding to the linking position in the ECC block supplied from the linking position manager 92 of the system controller 9. As a result, a linking timing signal as shown in (B) and (C) of FIG. 10 is generated. That is, the linking timing generator 54
"H" and "L" binary linking for extracting a signal section corresponding to a linking position as shown in FIG. 10B from a signal included in the reproduced RF signal shown in FIG. Generate a timing signal. Also, “H” for extracting a signal section corresponding to the PLL pull-in area after the linking position as shown in FIG. 10C from the signal included in the reproduced RF signal shown in FIG.
An “L” binary PLL pull-in timing signal is generated. In the example of FIG. 10, the "L" portion of the linking timing signal corresponds to a signal section for extracting a signal section at the linking position from the reproduced RF signal. The "L" portion of the PLL pull-in timing signal corresponds to a signal section for extracting a signal section at the PLL pull-in position from the reproduced RF signal. The linking timing signal and the PLL pull-in signal are supplied to the switching control circuits 45, 46, 47, 48 of the amplifier unit 4 and the servo circuit 8
Is sent to the hold circuit 81.

Switching hold control circuit 45 of amplifier section 4
Is a control circuit for switching control of the response characteristics of the AGC circuit 41. In a section where the linking timing signal is "L", that is, a signal section corresponding to the linking position, the response of the AGC to the reproduced RF signal is set to the previous value. The control for holding the signal level is performed, and the control for increasing the response speed of the AGC to the reproduced RF signal in a section where the PLL pull-in signal is “L”, that is, a signal section corresponding to the position of the PLL pull-in signal, is performed. Do.

The switching control circuit 46 of the amplifier section 4
A control circuit for changing the equalizing characteristic of the equalizer. Similarly, in the section where the linking timing signal is "L", that is, in the signal section corresponding to the linking position, the equalizing characteristic for the reproduced RF signal is set to the previous value signal level. Hold control and PLL
The section where the pull-in signal is "L", that is, PL
In the signal section corresponding to the position of the L pull-in signal, the reproduction RF
Control is performed to increase the response speed of the equalizing characteristic to the signal, for example.

The switching control circuit 47 of the amplifier section 4 is a control circuit for changing and controlling the slice level of the binarization circuit 43 and the response characteristic of the filter, and similarly, the section in which the linking timing signal is "L". That is, in the signal section corresponding to the linking position, control is performed to hold the slice level voltage or response speed for the reproduced RF signal, or to hold the frequency characteristics and response of the filter. Further, in a section where the PLL pull-in signal is “L”, that is, in a signal section corresponding to the position of the PLL pull-in signal, the slice level voltage or the response speed to the reproduced RF signal is increased, or the filter frequency characteristics or Control is performed to increase the response speed, for example.

The switching control circuit 48 of the amplifier unit 4 includes a PLL
A control circuit for changing and controlling the response characteristic of the circuit, in which the response of the PLL circuit is held in a section in which the linking timing signal is “L”, that is, in a signal section corresponding to the linking position. Control is performed such that the response speed of the PLL circuit is increased in the section “L”, that is, the signal section corresponding to the position of the PLL pull-in signal.

Further, the servo section 8 includes at least a focus servo circuit 82, a tracking servo circuit 83, and a spindle servo circuit 84. The hold circuit 81 includes these focus servo circuit 82, tracking servo circuit 83, and spindle servo circuit. Each drive output 84 is placed in a section where the linking timing signal is “L”, ie, a signal section corresponding to the linking position, and a section where the PLL pull-in signal is “L”, ie, the position of the PLL pull-in signal. Control is performed so as to output a pre-hold and a reference voltage in a corresponding signal section.

The optical disk device according to the embodiment of the present invention
Providing the configuration shown in FIG. 9 makes it possible to realize the above-described processing of the third countermeasure method in a signal section corresponding to the linking position. The switching control in each of the switching control circuits 45, 46, 47, and 48 of the amplifier unit 4 is performed in such a manner that the section in which the linking timing signal is “L” (the signal section corresponding to the linking position) and the PLL pull-in signal are “ In the section "L", that is, in the signal section corresponding to the position of the PLL pull-in signal, all the switching controls are performed, or only one of the switching controls is performed, or the switching control is performed. May be performed by adaptively combining some of them.

In this embodiment, if data other than the linking position information, for example, the laser power, the ambient temperature, and the strategy value at the time of recording are recorded in the management data area, the linking position can be changed. The difference between the data before and after can be predicted, and as a result, it is possible to more appropriately set the response characteristics and the like of each item in the first countermeasure.

In this case, the ECC block has a sector of 2048 bytes and 16 sectors as one unit. However, it is apparent that other configurations may be used.

Note that the linking position and the number of bytes are merely examples, and can be changed in any way depending on the correction capability, the configuration of the PLL circuit, and the like.

[0094]

As described above, according to the present invention,
By setting a linking portion (linking position) near a rear end of a data area in a specific sync frame of a specific sector of the error correction block (for example, in a second sync frame of the first sector, new information is already stored. Since it is possible to obtain a recording medium additionally recorded after the recording information, as a result, when reproducing the recording medium, even if the reproduction scanning is performed on the linking position, the sync frame of the sync frame where the linking position exists can be obtained. After the elapse of the period, it is possible to obtain high-quality reproduction data having no frequency or phase shift, and it is also possible to improve the splicing reproduction of the already recorded information and the additional information additionally recorded thereafter, Recording medium, recording method, recording apparatus, and reproducing method capable of eliminating the amount of unreproducible data at a linking position as compared with conventional ones , It is possible to provide a reproducing apparatus.

[Brief description of the drawings]

FIG. 1 shows E in recording information recorded on a DVD-RW.
FIG. 3 is a diagram illustrating a structure of a CC block.

FIG. 2 is a diagram showing a physical format of recording information recorded on a DVD-RW.

FIG. 3 is a diagram showing a physical format of one sector.

FIG. 4 is a diagram showing a physical format including a conventional linking position of one sector.

FIG. 5 is a diagram showing a physical format including a linking position of one sector on the recording medium of the present invention.

FIG. 6 is a diagram showing a physical format including a linking position of one sector on the recording medium of the present invention.

FIG. 7 is a block diagram illustrating a schematic configuration of an optical disc device.

FIG. 8 is a diagram for explaining the relationship between the configuration of an ECC block and linking.

FIG. 9 is a block diagram showing a configuration of a main part when realizing a first coping method of the optical disc device.

FIG. 10 is a waveform diagram used to explain a linking timing signal for extracting a signal section corresponding to a linking position from a reproduced RF signal.

[Explanation of symbols]

1 ... optical disk (recording medium), 2 ... spindle motor, 3
... Optical head, 4 ... Amplifier section, 5 ... Signal processing section, 6 ... AV
Encoding / decoding unit, 7: track buffer memory, 8: 1
6 Mbytes D-RAM, 9 ... System controller, 1
0 ... key input unit, 11 ... input and output terminals for audio and video signals, 12 ... input terminal for control data, 13 ... ATAP
I interface

Claims (15)

[Claims] 1. A recording medium wherein a linking position indicating a head of additional recording is provided at a specific position in said error correction block when predetermined information is recorded for each error correction block unit. The block is composed of a predetermined number of sectors, each of the sectors is composed of a predetermined number of sync frames, and the correction capability of the error correction block is n bytes (n is a positive integer) per the predetermined number of sync frames. The recording medium, wherein the linking position is provided in a data area within n bytes from a rear end position of the specific sync frame in the specific sector. 2. A recording medium wherein a linking position indicating a head of additional recording is provided at a specific position in the error correction block when predetermined information is recorded for each error correction block unit. The block is composed of a predetermined number of sectors, each of the sectors is composed of a predetermined number of sync frames, and the correction capability of the error correction block is n bytes (n is a positive integer) per the predetermined number of sync frames. The linking position includes m bytes (n ≧ m) in a data area within n bytes from a rear end position of the specific sync frame in the specific sector, and the m bytes include at least the linking position. And m2 bytes of a pull-in area for pulling in a signal after linking. Recording medium comprising a Rukoto. 3. A recording medium according to claim 2, wherein a predetermined signal for pull-in is recorded in said pull-in area m2 bytes. 4. When recording predetermined information for each error correction block unit, a linking position indicating the head of additional recording is set to n bytes (n is a positive number) per a predetermined number of sync frames having a correction capability of the error correction block. A first step of detecting a specific sector in an error correction block of predetermined information to be additionally recorded on a recording medium, comprising: A second step of detecting a specific sync frame from a predetermined number of sync frames constituting the specific sector; and data within n bytes from a rear end position of the specific sync frame detected in the second step. A third step of additionally recording predetermined information using the area as a linking position. 5. When predetermined information is recorded for each error correction block unit, a linking position indicating the head of additional recording is set to n bytes (n is a positive number) per a predetermined number of sync frames having a correction capability of the error correction block. A first step of detecting a specific sector in an error correction block of predetermined information to be additionally recorded on a recording medium, comprising: A second step of detecting a specific sync frame from a predetermined number of sync frames constituting the specific sector; and m within n bytes from a rear end position of the specific sync frame detected in the second step. Bytes (n ≧ m)
Of the m bytes consisting of at least m1 and m2 bytes, the position of the m1 byte is a linking area provided with the linking position, and the position of the m2 byte is a pull-in for drawing a signal after linking. A third step of additionally recording predetermined information as an area. 6. The recording method according to claim 5, further comprising: a fourth step of additionally recording, in said attraction area, attraction information different from predetermined information to be additionally recorded. 7. When recording predetermined information for each error correction block unit, a linking position indicating the head of additional recording is set to n bytes (n is a positive number) per a predetermined number of sync frames having a correction capability of the error correction block. An integer), a first unit for detecting a specific sector in the error correction block of predetermined information to be additionally recorded on a recording medium, Second means for detecting a specific sync frame from a predetermined number of sync frames constituting the specific sector; and n bytes or less from a rear end position in the specific sync frame detected by the second means. And a third means for additionally recording predetermined information with the data area as a linking position. 8. When recording predetermined information for each error correction block unit, a linking position indicating the head of additional recording is set to n bytes (n is a positive number) per a predetermined number of sync frames having a correction capability of the error correction block. An integer), a first unit for detecting a specific sector in the error correction block of predetermined information to be additionally recorded on a recording medium, A second means for detecting a specific sync frame from a predetermined number of sync frames constituting the specific sector; m within n bytes from a rear end position of the specific sync frame detected by the second means; M, which is at least composed of m1 and m2 bytes out of bytes (n ≧ m)
A third means for additionally recording predetermined information by setting the position of the m1 byte of a byte as a linking area where the linking position is provided, and setting the position of the m2 byte as a pull-in area for pulling in a signal after linking; A recording device comprising: 9. The recording apparatus according to claim 8, further comprising: fourth means for additionally recording attraction information different from predetermined information to be additionally recorded in said attraction area. 10. A reproducing method for reproducing information in units of error correction blocks in which a linking position indicating the start of additional recording of predetermined information is provided at a specific position in the error correction block on a recording medium for each error correction block unit. A first step of reading information indicating a linking position recorded at a specific position on the recording medium; and an error correction block of predetermined information for reproducing an information signal recorded on the recording medium. A second step of detecting a specific sector, a third step of detecting a specific sync frame from a predetermined number of sync frames constituting the specific sector, and a linking position read in the first step. N bytes (n is a positive integer) from the rear end position in the specific sync frame detected in the third step based on the information A fourth step of extracting a signal at a linking position from a data area in the data area, and a fifth step of reproducing the extracted signal at the linking position by optimizing a reproduction signal circuit. . 11. A linking position indicating the start of additional recording of predetermined information for each error correction block unit is provided at a specific position in the error correction block of the recording medium, and the correction capability of the error correction block is a predetermined number. N per sync frame
A reproduction method for reproducing information in units of error correction blocks, each of which is a byte (n is a positive integer), wherein an error correction block of predetermined information is reproduced in order to reproduce an information signal recorded on the recording medium. A first step of detecting a specific sector of the specified sector; a second step of detecting a specific sync frame from a predetermined number of sync frames forming the specific sector; and the detecting step of detecting the specific sector. M bytes within n bytes from the rear end position in the sync frame of
a third step of extracting a signal at a linking position from the position of m); a signal of the m1 byte of the linking area in the m bytes at least composed of m1 and m2 bytes; and a signal of the m2 byte of the pull-in area. And reproducing the signal at the extracted linking position by optimizing a reproduction signal circuit. 12. A linking position indicating the start of additional recording of predetermined information for each error correction block unit is provided at a specific position in the error correction block of the recording medium, and the correction capability of the error correction block is a predetermined number. N per sync frame
A reproducing method for reproducing information in units of error correction blocks each being a byte (n is a positive integer), wherein a first step of reading information indicating a linking position recorded at a specific position on the recording medium; A second step of detecting a specific sector in an error correction block of predetermined information in order to reproduce an information signal recorded on a recording medium; and determining a specific sector from a predetermined number of sync frames constituting the specific sector. A third step of detecting the sync frame of the specified sync frame, and m within n bytes from a rear end position in the specific sync frame detected in the third step based on the linking position read in the first step. Bytes (n
≧ m) The fourth step of extracting the signal at the linking position from the position
And reproducing the extracted signal of the linking position with respect to the m1 byte signal of the linking area in the m bytes, which is at least composed of m1 and m2 bytes, and the m2 byte signal of the pull-in area. A fifth step of optimizing and reproducing the signal circuit. 13. A reproducing apparatus for reproducing information in units of error correction blocks, wherein a linking position indicating the head of additional recording of predetermined information is provided at a specific position in the error correction block on a recording medium for each error correction block. A first means for reading information indicating a linking position recorded at a specific position on the recording medium; and an error correction block for predetermined information for reproducing an information signal recorded on the recording medium. A second means for detecting a specific sector, a third means for detecting a specific sync frame from a predetermined number of sync frames constituting the specific sector, and a linking position read by the first means. N bytes (n is a positive integer) from the rear end position in the specific sync frame detected by the third means based on the indicated information
A fourth means for extracting a signal at a linking position from a data area within a range, and a fifth means for optimizing a reproduction signal circuit and reproducing the extracted signal at the linking position. . 14. A linking position indicating the start of additional recording of predetermined information for each error correction block unit is provided at a specific position in the error correction block of the recording medium, and the correction capability of the error correction block is a predetermined number. N per sync frame
A reproduction method for reproducing information in units of error correction blocks, each of which is a byte (n is a positive integer), wherein an error correction block of predetermined information is reproduced in order to reproduce an information signal recorded on the recording medium. A first means for detecting a specific sector of the specified sector; a second means for detecting a specific sync frame from a predetermined number of sync frames constituting the specific sector; and the specified means detected by the second means. Third means for extracting a signal at a linking position from m-byte (n ≧ m) positions within n bytes from the rear end position in the sync frame of the above-mentioned sync frame; With respect to the m1 byte signal in the linking area and the m2 byte signal in the pull-in area, the extracted signal at the linking position is reproduced by optimizing a reproduction signal circuit. A reproducing apparatus, comprising: fourth means. 15. A linking position indicating the start of additional recording of predetermined information for each error correction block unit is provided at a specific position in the error correction block of the recording medium, and the correction capability of the error correction block is a predetermined number. N per sync frame
A reproduction method for reproducing information in units of error correction blocks, which are bytes (n is a positive integer), wherein: first means for reading information indicating a linking position recorded at a specific position on the recording medium; Second means for detecting a specific sector in an error correction block of predetermined information in order to reproduce an information signal recorded on a recording medium; and determining from a predetermined number of sync frames constituting the specific sector. A third means for detecting the sync frame of the specified sync frame, and m within n bytes from a rear end position in the specific sync frame detected by the third means based on the linking position read by the first means. Fourth means for extracting a signal at the linking position from the position of the byte (n ≧ m); Fifth means for optimizing a reproduction signal circuit and reproducing the extracted signal at the linking position with respect to the m1 byte signal and the m2 byte signal in the pull-in area is provided. Playback device.