JP3367658B2 - Information recording medium reproduction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] The present invention relates to a DVD-ROM and a DVD-ROM.
D that can record more than 1000 times with compatibility
VD-RW (DVD-RW rewritable)
From information recording media such as high-density optical disksPlay information
Information recording medium reproducing methodBelongs to. [0002] 2. Description of the Related Art Generally, DVD-ROMs are compatible.
DVD-RW, etc. that can record over 1,000 times
Information recording medium, the area where old record information was recorded
If you try to overwrite new record information in the area later,
There is no linking area for
Linking position of new record information, regardless of frequency or phase
As a result, the data cannot be read due to discontinuity. [0003] Therefore, a new type of recordable information recording medium has been developed.
An information recording method and apparatus for additionally recording record information
When recording new record information following the old record information,
Has been used in the link between the old record information and the new record information.
Used in the old record information or new record information.
ECC (Error Correcting C)
ode) The amount of information corresponding to an error correction unit such as a block
A corresponding contiguous area, and the old record corresponding to this contiguous area
The last part of the information and the first part of the new record information,
If there is no meaningful dummy information or predetermined RF (Radio Freq
uency) signal, and then record the new information
Starting to record was done. Here 1
The ECC block is composed of 16 sectors. [0004] The reason for providing this continuous portion is to record later.
When playing back new and old recorded information continuously
If there is no continuous part, the old recording information recording area and the new recording information
Each RF signal is disconnected at the boundary with the recording information recording area.
In such a case, the playback
Sources where focus servo and tracking servo become unstable
It is because it causes. [0005] In addition, a continuous portion for one ECC block is provided.
The reason for recording meaningless dummy information etc. there is
In conventional error correction processing, error correction is
This is performed for each positive unit, and is performed in the error correction unit.
When recording new record information from inside, after recording new record information
When playing back the old record information and the new record information continuously,
About the beginning of the new record information in the error correction unit
Does not perform error correction correctly, and
This is because they will not be able to live. In this regard,
Dummy information that has no meaning in the continuous area
To record 1 ECC block of RF signal
If you keep the old record information and the new record
Even if both are destroyed due to overlapping recorded information,
The information recorded in the part is meaningless dummy information or
Since this is a predetermined RF signal, this part is read without being reproduced.
Skip and record new record information from the next ECC block
By reproducing the information, the old record information and the new record information can be reproduced.
You can live. Another reason for providing the continuous area is as follows.
New recording information can be added continuously to the old recording information without providing a continuous area.
When recording, the old record information and the new record information
Both sides may be destroyed, but the extent of the destruction in that case is
If the error correction unit is exceeded, destroy the recorded information.
This is because it may not be possible to repair it. This question
To solve the problem, Japanese Patent Laid-Open No. 9-270171
The ones mentioned in the report have been proposed. This proposal is based on the
Has a capacity of, for example, about 32 kByte
That this area is filled with information unrelated to playback.
Above, it is necessary to record a large amount of information.
In the case of high density discs,
The recording area on the recording medium cannot be used effectively
Effective recording area of the information recording medium
That new record information can be additionally recorded while utilizing
Both perform accurate reproduction of old and new recorded information
To provide an information recording method and apparatus capable of
Was. [0007] However, as described above,
In the conventional linking method, the division
Trailing end of specific data portion of recorded data
It is determined that the linking part is located near
You. For this reason, during linking,
As a result of discontinuity of data, frequency
Number and phase shifts occurred. Therefore, solve this shift
Since the playback device starts the PLL operation to erase it,
However, to return to the original state without this deviation,
I need some time. Therefore, in the conventional linking method,
Due to linking, reproduced data has no frequency or phase
Playback during the period from when this occurs until this gap is resolved
Data cannot be played back.
The data volume was large. Specifically, for example, 32kBy
An error consisting of columns and rows with a data capacity of about te (bytes)
4 (ECC block shown in FIG. 4B)
Data structure in each sector that constitutes
The linking position is the data of the second sync frame H1.
Near the rear end of the data area (within PI) and before and after this position
In the new data is linked after the old data
Therefore, discontinuity occurs in the old and new data. Also two sinks
Data using the aforementioned PI in data units for frames
Is corrected. As a result, during playback, this new
At the old data seam, the frequency and phase of the old data
The frequency and phase of the new data are shifted. Playback device
The side starts PLL operation to eliminate this deviation.
However, before the frequency and phase of the old and new data are aligned,
It takes a long time (for example, data for two sync frames).
Data playback time). For this, the second sink frame
The next horizontal line (third sync frame H2, fourth frame
When the linked frame H3) is played back,
In this case, the frequency and phase shifts still occur. No.
At the time of playback after five sync frames H3,
Number and phase shifts are eliminated. Therefore, a total of 2 rows
Data (first sync frame H0 to fourth sync frame)
H3), data for a total of 4 sync frames cannot be played
There was a problem. [0008] [0009] The present invention has been made in view of the above problems.
Prevents data errors during playback and ensures stable
Enables easy playbackInformation recording medium reproduction methodFor the purpose of providing
And [0010] [Means for Solving the Problems] To solve the above-mentioned problems.
Therefore, the present invention provides the following information recording mediumPlayback methodOffer
Offer. When recording information in error correction block units,
The recording end position or the start position of additional recording
The marking position at a specific position in the error correction block.
A digitized information recording medium, wherein the error correction block comprises:
It consists of a predetermined number of sectors, each of said sectors being a predetermined number
And a plurality of sync frames each including a sync frame including
Data and parity in the link frameWhenA row consisting of
A regular block and data spanning a plurality of the sync frames.
It consists of a series of correction blocks consisting of data and parity.
The linking position is determined by the specific plurality of the
Of the correction block in the row of the link frame
Near the beginning of the frame data area.
Information recording mediumPlay information fromDoInformation recording medium reproduction
MethodAndTrying to reproduce from the information recording medium
First step for detecting the address of the error correction block
And It corresponds to the linking position of the error correction block.
A second step of setting a position The second step
In the position corresponding to the linking position set in
And a third step of changing the characteristics of the reproduction circuit.
An information recording medium reproducing method characterized by the above-mentioned. [0011] DESCRIPTION OF THE PREFERRED EMBODIMENTS Next,Reproduction of information recording medium of the present invention
Method,The present inventionis connected withInformation recording medium recording device, the present invention
Of recording media and recording methods related to
You. The recording medium related to the present invention is a single error correction block.
Indicates the start of additional recording when recording one piece of information for each position
Linking position to a specific position in the error correction block
In the recording medium provided, each error correction block,
It consists of a predetermined number of sectors, each of which is
Consisting of a constant sync frame, the linking position
The location is the specific sync frame within the specific sector.
Is provided in the data area near the beginning of the program.
It is a recording medium characterized by the following. Further, the recording medium related to the present invention has an error.
When recording one piece of information for each correction block unit,
The linking position indicating the beginning of the recording
A recording medium provided at a specific position in the
The normal block is composed of 16 sectors, each of which is
The receiver consists of 26 sync frames,
The syncing position is the third sync frame in the first sector.
Is provided in the data area immediately after the sync code of
It is a recording medium characterized by the above-mentioned. Further, the recording medium related to the present invention has an error.
When recording one piece of information for each correction block unit,
The linking position indicating the beginning of the recording
A recording medium provided at a specific position in the
The normal block is composed of 16 sectors, each of which is
The receiver consists of 26 sync frames,
The syncing position is the third sync frame in the first sector.
In the data area immediately after the sync code of
Provided between the first byte and 10 bytes of the data area
The recording medium is characterized by being recorded. Further, the recording method related to the present invention has an error.
When additional information is recorded for each correction block,
The linking position indicating the start of additional recording is
This is a recording method provided at a specific position in the correction block.
The information to be additionally recorded on the recording medium.
A first method for detecting a specific sector in an error correction block
And a plurality of synths constituting the specific sector.
The second method of detecting a specific sync frame from the
And the identifying detected in the second step
Link the first byte of the data area in the sync frame of
A third position for additionally recording new one information as a recording position
And a recording method. Further, the recording apparatus of the present invention has an error correction block.
When recording one piece of information for each
The linking position indicating the error correction block on the recording medium.
A recording device provided at a specific position in the recording medium, wherein the recording medium
Error correction block of one information to be additionally recorded on the body
First detecting means for detecting a specific sector in the
From multiple sync frames that make up a specific sector
A second detecting means for detecting a specific sync frame;
The specific sync frame detected by the second detecting means.
The first byte of the data area in the
Recording means for additionally recording new one information.
A recording apparatus characterized in that: Furthermore, the recording medium related to the present invention is
Pre-divided for each set of error correction rows and columns
Performs predetermined signal processing on the recorded information
Information recording medium for storing processing record information consisting of record units
And the position of the additional recording is at the end of the row of the error correction.
A recording medium characterized by being a head position. Further, the recording medium related to the present invention is
In the row of the preset error correction, the sync code etc.
A structure in which record information is arranged after control information,
The additional recording position is the sync code of the row of the error correction.
Recording immediately after the control information such as
Medium. Further, the recording method according to the present invention is
Pre-divided for each set of error correction rows and columns
Performs predetermined signal processing on the recorded information
Generate processing record information consisting of recording units, and
An information recording method for recording information on an information recording medium,
Generates the processing record information and additionally writes on the information recording medium
The recording position shall be the position immediately after the error correction row.
This is a recording method characterized by the following. Further, the recording method related to the present invention
In the row of the preset error correction, the sync code etc.
A structure in which record information is arranged after control information,
The position of additional recording on the information recording medium is determined by the row of the error correction.
The position immediately after the control information such as the sync code of
This is a characteristic recording method. Further, the recording apparatus according to the present invention has a preset
Pre-divided error correction row and column units
Means for performing predetermined signal processing on recording information, multiple recordings
Means for generating processing record information composed of units,
Information recording means for recording recording information on an information recording medium;
The position where additional recording is performed on the
It is characterized by comprising additional recording means for immediately following position.
Recording device. Further, the recording apparatus of the present invention is provided with
The control information such as the sync code is displayed in the row of the specified error correction.
Followed by the recorded information, wherein the information
The position for additional recording on the recording medium is determined by the row in the row of the error correction.
From the position additional recording unit immediately after the control information such as link code
The recording device is characterized in that: Next,Information recording medium reproducing method of the present invention,Book
inventionis connected withInformation recording medium recording device, related to the present invention
Recording medium and recording method based on the drawings.
explain. Note that the following embodiments are compatible with DVD-RWs.do it
Explain, but other additional recordable CD-Rs,
Even when using recording media such as CD-RW, DVD + RW, etc.
It goes without saying that Ming is applicable. "Record formatForm" Hereinafter, first, the "recording format used in the present invention"
FormWill be described. First, record on DVD-RW
General physical format for recording information
FIGS. 1, 2 and 3 show an error correction process for recording information.
This will be described with reference to FIG. First, in the DVD-RW of this embodiment,
Error correction processing and error correction in the error correction processing
The ECC block as a unit is explained using FIG.
I will tell. Generally, recording information recorded on a DVD-RW
The report includes a plurality of data sectors 20 shown in FIG.
It has a physical structure. And one day
In the data sector 20, from the beginning, the data sector
ID information 21 indicating the start position of the ID 20 and the ID information 2
ID information error correction code (I
ED) 22 and spare data (for example, CPM) 23
A data area 24 for storing main data to be recorded;
Error detection for detecting an error in the data area 24.
Outgoing code (EDC) 25, and this data
Recording to be recorded by a plurality of consecutive sectors 20
Information is organized. Next, using this data sector 20, E
The processing when configuring the CC block will be described with reference to FIG.
Will be explained. ECC block using data sector 20
When constructing a network, as shown in FIG.
In addition, one data sector 20 is divided horizontally every 172 bytes.
Each of the divided and divided data (hereinafter referred to as data
Lock 33. ) Are arranged vertically. At this time,
12 rows of data blocks 33 are arranged in the vertical direction.
Become. Then, each of the horizontal data arranged in the vertical direction is
10-byte ECC code (P
I (Pality In) code) 31 to the data block 33
To form one correction block 34. This
In the stage, the correction block to which the ECC internal code 31 is added is set.
In other words, the clocks 34 are arranged in 12 rows in the vertical direction. That
Thereafter, this process is repeated for 16 data sectors for 20 minutes.
You. As a result, a 192 line correction block 34 is obtained.
You. Next, the above-mentioned correction block 34 of 192 lines is used.
Are arranged in the vertical direction.
Vertical correction block 34 from the beginning every byte
16 ECCs for each divided data
An outer code (PO (Pality Out) code) 32 is added. What
Note that the ECC outer code 32 is
Among them, it is also added to the part of the ECC inner code 31. With the above processing, 16 data sectors are obtained.
One ECC block 30 including 20 is shown in FIG.
It is formed as follows. At this time, one ECC block 30
The total amount of information contained within (172 + 10) bytes × (192 + 16) rows = 378
56 bytes Of which is recorded in the actual data area 24
Data is, 2048 bytes x 16 = 32768 bytes Becomes The ECC block 3 shown in FIG.
0 indicates 1-byte data with "D #. *"
ing. For example, “D1.0” is placed in the first row and the zeroth column.
Indicates one byte of data that has been stored, and “D190.
170 "is the one bar located at row 190, column 170.
Shows the data of the site. Therefore, the ECC code 31
Are arranged in columns 172 to 181 and have an ECC outer code
32 is to be arranged from the 192nd line to the 207th line.
You. Further, one correction block 34 is a DVD-R
It is recorded continuously on W. Here, as shown in FIG.
As shown in FIG.
The configuration including both of the CC outer codes 32 is shown in FIG.
Correction of data arranged in the horizontal (horizontal) direction in (B)
Correction is performed using the ECC code 31 and the vertical direction in FIG.
Correction of data arranged in (vertical) direction is ECC outer code
32. That is, E shown in FIG.
In the CC block 30, the horizontal (horizontal) direction and the vertical direction
It is possible to correct errors twice in the (vertical) direction,
Error correction used in conventional CDs (Compact Disks)
Structured to enable more powerful error correction than normal processing
Have been. More specifically on this point, for example,
One correction block 34 (as described above, one line of ECC
A total of 182 bytes of data including the inner code 31
Subsequently, it is recorded on the DVD-RW. ) Up to 5 bytes
If it is, it can be corrected even if it is destroyed by scratches etc.
There is a DVD-RW flaw that is 6 bytes or more and one row is all
Etc., if it is destroyed, etc.
I can no longer do it. However, all rows are destroyed by scratches etc.
Even if done, when viewed from the vertical,
1 byte data destruction for ECC outer code 32 of column
There is only. Therefore, using the ECC outer code 32 of each column,
If error correction is performed, the entire correction block 34
Correct errors and correct
It can be reproduced. However, acquired wounds
Considering occurrence, etc., horizontal (horizontal) scratches will be large
Also leads to the next vertical row (horizontal) error
It goes without saying that it is kept to a minimum. By the way,
This vertical error is described in 8 rows (erasure correction).
Correction is possible even if there are 16 columns (positive). Next, the ECC block 3 shown in FIG.
0 is a data sector 20
-For how it is recorded in the RW, use FIG.
Will be explained. Note that, in FIG. 2, “D #. *” Is used.
The data to be written is the data described in FIG.
Yes, it is. Record ECC block 30 on DVD-RW
At the time of recording, first, as shown in FIG.
C blocks 30 are aligned horizontally in each correction block 34
Are arranged and interleaved, so that 16
It is divided into recording sectors 40. At this time,
One recording sector 40 is 2366 bytes
(37856 bytes @ 16)
These include the data sector 20 and the ECC code 31 or
Indicates that the ECC outer code 32 is mixed. However, each record
At the beginning of the data sector 20
ID information 21 (see FIG. 1A) is arranged. Then, one recording sector 40
Is, as shown in FIGS. 2B and 2C,
The data is divided into data 41, and a sink H is added to each of them.
After that, the recording sector 40 in this state is 8--
By performing 16 modulations, one system is provided for each data 41.
The link frame 42 is formed. At this time, one sink
As shown in FIG. 2D, the frame 42 has a sink H '.
And data 43. Also, one Shin
The information amount in the frame 42 is 91 bytes × 8 × (16
/ 8) = 1456 bytes, and this sync frame 4
Information is written on the DVD-RW disc in a continuous form
Be included. At this time, one recording sector 40
Include 26 sync frames 42. This will be described with reference to FIG. Physical
First sector of ECC block consisting of 16 sectors
Is configured as shown in FIG. That is, the rows are data
172 bytes of data, 10 bytes of PI and 4 bytes of sink
Consists of 186 bytes and adds one row of PO to 12 rows of columns.
It consists of 13 lines. Sync from H0 to H25
26 bytes. By constructing the physical format described above,
By recording information on a DVD-RW disc,
8-16 demodulation and deinterleaving when reproducing the information
The original ECC block 30 (see FIG. 2).
Can be restored, minimizing the amount of data blocks
Strong error correction as described above because it can be small
So you can do the right thing and reproduce the information most accurately
is there. Next, additional recording is performed using FIG. 4 and FIG.
The position, that is, the linking position will be described. FIG.
In FIG. 3, an ECC block conforming to the DVD-R standard shown in FIG.
Based on rock. As shown in FIG.
Of the first sector of the ECC block
The range and rules between 82 and 87 bytes from the beginning of sink H1
Is defined. That is, the second sync frame sy2
Is a 2-byte second sink H1, 81-byte data,
Whether it consists of 10-byte PI code (PI)
Linkin between the 2nd and 7th bytes from the beginning of this PI
Will be performed. Before and after the linking position L
Is the phase or frequency of the recorded data fluctuating (shifting)?
A clock is generated by PLL or the like for the previous data
PLL cannot be locked when trying to establish
Data may not be read. The linking position L corresponds to the position of the second sink H1.
For example, at the position of the 82nd byte from the beginning, 82 to 9
Unable to read 10 bytes of data up to the first byte
Will be. That is, the width of the linking position L is 6 bars.
And the correction capability of the PI column is 5 as described above.
This first row (ie, the first and
Unable to correct each data of the second sync frames sy1 and 2
Becomes Next, the second row containing the sink of H2 (ie, the second row)
Each data of the third and fourth sync frames sy3,4) is
Until the sink position of the third sink H2 is reached, P
If the LL locks, it can be read, but it cannot be added to the phase.
If the frequency fluctuates, the PLL pulls in.
Requires a signal of several tens of bytes, and the third sink H2 is
It cannot be detected. As a result, in the second row
Data cannot be established and this column becomes uncorrectable.
I will. As described above, even if eight PI columns are broken,
In the end, the data can be read
It is possible. However, there are potentially two rows of errors
Is vulnerable to an increase in acquired errors
is there. On the other hand, FIG. 5 shows a recording medium related to the present invention.
1 shows a specification of a DVD-RW or the like, which is an example. here
Then, the linking position L is the first sector of the ECC block.
From the top of the data area immediately after the third sink H2
It is defined as a range between three bytes. That is, this phosphorus
The width of the king position L is 3 bytes (see FIG. 4 described above).
Half of the case), this third sync frame sy3
3rd sink H2 of data, 81 bytes of data, 10 bytes
Since the third sync frame is
From the beginning of the data area of the
Will be used for linking. This link
The synchronization position L is the data area of the third sync frame sy3.
Start data position (3rd byte from start of data area)
Hanging on Before and after this linking position L, the recording data
Data before the data phase or frequency fluctuates (shifts).
A clock is generated by a PLL or the like for the
If you attempt to lock the PLL,
May not be read. This linking position
Example where the position L is from the beginning of the data area immediately after the third sink H3
For example, if the position is up to the 2nd byte, the 2nd to 91st bytes
Unable to read 89 bytes of data until
You. As described above, the correction capability of the PI sequence is up to 5 bytes.
Therefore, the second row (ie, the third and fourth sink frames)
The data of each of the frames sy3 and sy4 cannot be corrected. Only
And the next third row (ie, the fifth and sixth sync frames)
sy5,6)
Is sufficient for the PLL to pull in, even under worst-case conditions.
As a result, the sink of the fourth sink H4 can be detected.
As a result, the data in the second row described above can be established.
It is not possible to correct errors
Only two rows, like the one shown in FIG.
In addition, two rows, the first and second rows, become uncorrectable and
Data can be prevented from being destroyed. That is, P
It is possible to reduce the amount of destruction of data as I column by half
it can. The linking position L is the third sync position.
Set in the third byte from the beginning of the data area of frame sy3
In addition to the above, (1)
The anchoring position L is the data area of the third sync frame sy3.
Using 3 bytes between the 10th byte and the beginning of the area
Or (2) the linking position L is
3 bytes from the beginning of the data area of one sync frame sy1
(3) Linking position
L is from the beginning of the data area of the first sync frame sy3
It is provided using 3 bytes up to the 10th byte
Needless to say, it can be done. [Form of Information Recording Apparatus] Next, FIGS.
3, 4 and FIG.
Information in a DVD-R format in a physical format
About the form of the recording device according to the present invention for recording on W
This will be described with reference to FIG. In the following embodiment, D
In VD-RW, the address information on the DVD-RW
The pre-pit that records the information etc.
Recorded information that has been formed in advance on the information track, etc.
Sometimes, the pre-pit is detected in advance, so that the DV
The address information on the D-RW is obtained, and the recorded information is
Detect and record the recording position on DVD-RW to be recorded
Shall be. Hereinafter,Information recording medium reproducing method of the present invention,Book
inventionis connected withInformation recording medium recording device, related to the present invention
Refer to the drawings for the preferred form of the recording medium and recording method.
This will be described in detail while referring to the figures. First, the configuration of the recording device
This will be described with reference to FIG. FIG. 6 shows a recording medium, a recording method and an apparatus.
The schematic configuration of an optical disk device as an applied form is shown.
You. In this embodiment, for example, M
Uses PEG2 and can be rewritten as an example of an optical disk
DVD-RW that can be used. In the configuration of FIG.
Is usually provided in a so-called DVD device or the like.
Many parts have been omitted. In FIG. 6, the optical disk 1 is, for example,
This is a recordable optical disk made of phase-change material.
In the state, for example, a so-called DVD-RW disc is used.
You. Note that DVD-RW discs are not
(Tracks) are helically arranged and have a constant linear velocity (CL
V), the rotation is controlled, and 16 consecutive sectors
Constitute one block, and this one block is the error
The correction processing unit (ECC block) is used. This
Of the optical disk 1 by a chucking mechanism (not shown).
And is attached to the spindle motor 2. The spindle motor 2 is connected to a driver 7
It is driven to rotate more and is checked by a chucking mechanism.
The rotating optical disk 1 is rotated. Also this
The spindle motor 2 includes an FG generator and a hall element.
And means for detecting a rotational position signal of a child or the like. this
The FG signal from the FG generator and the FG signal from the Hall element
The rotation position signal is passed through the driver 7 as a rotation servo signal.
Then, it is fed back to the servo unit 8. The optical head 3 uses a semiconductor laser as a light source.
Optical collimator lens, objective lens, etc.
Forming a laser spot on a predetermined track of the disc 1;
In addition, the objective lens can be driven by a biaxial actuator.
Focusing and tracking of the laser spot
Do the King. The semiconductor laser is driven by a laser drive circuit.
And the two-axis actuator is driven by the driver 7.
It is. The key input unit 10 is operated by a user.
Key operation input from the user.
The information is sent to the system controller 9. That is, this key
-From the input unit 10, recording start, reproduction start, recording stop,
Various key operation input information for instructing playback stop etc.
Can be entered. The interface unit 13 is, for example, a
Interface for sending and receiving data to and from computers
For example, the so-called ATAPI (ATA Packet
 Interface). The system controller 9 includes the key input unit 1
Recording start and playback start as key operation input information from 0
Start, stop recording, stop playback, etc.
First, the LSI (signal processing unit 5 and
Servo unit 8, amplifier unit 4, AV encoding / decoding unit 6, etc.)
Control. In addition, data is transmitted through the interface unit 13.
Send and receive data. For example, the resolution of the image to be recorded
And high-speed scenes such as car races
Control data for recording or setting with priority on recording time
Is input from the key input unit 10 or the input terminal 12
Also, the system controller 9 recognizes the control data.
To change the recording time based on the recognition result,
An external user can select the setting. Here, for example, a signal is reproduced from the optical disc 1.
When performing playback, an instruction to start playback is issued from the key input unit 10.
At this time, the system controller 9
In response to a raw start command, an amplifier unit 4 and a servo unit to be described later
8 and the driver 7 are controlled. That is, the optical disk 1
When a signal is reproduced from the system controller 9
First, while rotating the optical disc 1,
A laser spot onto the optical disk 1 and
Address previously formed on the signal track on the disk 1.
The eye to read the signal and reproduce from the address information
Target sector (track) and its target sector
Optical so that the laser spot is placed on the (track)
The head 3 is moved. The move to this target sector is complete
After that, signal reproduction from the target sector starts.
You. When the optical disk 1 is reproduced, the amplifier 4
From the target sector of the optical disc 1
Amplify the generated RF signal, and from this RF signal
Playback signal and tracking and focusing servo signals
(Tracking error and focus error signals)
To achieve. In addition, the amplifier unit 4 includes at least a reproduced signal.
Equalizer that optimizes the frequency characteristics of
Extract byte clock and generate speed servo signal
PLL (phase locked loop) circuit and the PLL circuit
The byte clock from the channel and the time axis of the reproduced signal?
A jitter generator for extracting a jitter component from the jitter component.
The jitter value generated by the amplifier unit 4 is
Controller 9 for tracking and focusing.
The servo signal and the speed servo signal are reproduced by the servo unit 8.
The signal is sent to the signal processing unit 5. The servo unit 8 is provided with a speed server from the amplifier unit 4.
Signal and focusing and tracking of the optical head 3
Receiving the servo signal and the spindle motor 2
Receives the rotation servo signals from the
Servo control for each corresponding part based on
U. More specifically, the servo unit 8 controls the PL of the amplifier unit 4.
Speed servo generated by L circuit according to disk rotation speed
Signal and the rotation servo signal from the spindle motor 2
The spindle motor 2 at a predetermined rotational speed
To rotate, i.e. the optical disc to a predetermined constant line
A rotation speed servo control signal such as rotating at a speed
Generate. Although details will be described later, in the present embodiment,
Is the maximum data transfer rate during internal compression / expansion
Faster recording speed (recording data transfer rate) / reproduction speed
Recording / reproduction of the optical disc 1 at a
So that the servo unit 8
The optical disc 1 is moved to a position suitable for the recording speed / reproduction speed.
Rotation speed servo control signal for rotating at constant linear speed
Generate In addition, the servo unit 8 includes focusing and
The optical head 3 emits light based on the tracking servo signal.
Focusing and tracking accurately on disc 1
To generate an optical head servo control signal. this
Rotation speed servo control signal and optical head servo control signal
Is sent to the driver 7. From now on, the optical disc
Recording speed (recording data transfer rate)
The playback speed of the optical disk 1 (playback data transfer rate)
G) is called a reproduction rate. The driver 7 controls each servo from the servo section 8.
It operates based on a control signal, and the servo unit 8
Spindle motor according to the rotation speed servo control signal
2 is rotated and the optical head servo control signal is
The two-axis actuator of the optical head 3 is driven accordingly.
In this embodiment, the driver 7 controls the rotation speed servo control.
By driving the spindle motor 2 according to the control signal
To rotate the optical disc 1 at a predetermined linear velocity,
The driver 7 emits light according to the optical head servo control signal.
By driving the biaxial actuator of the dynamic head 3
Of laser spot on optical disc
And tracking are performed. The signal processing unit 5 during reproduction of the optical disc 1
The reproduction signal supplied from the amplifier unit 4 is converted into an A / D (analog
/ Digital) conversion and obtained by this A / D conversion.
Detects synchronization from digital signals and
So-called EFM + signal (8-1)
6 modulated signals) to NRZ (Non Return to Zero) data
And then perform error correction processing,
Address data and reproduction data of the sector on the optical disc 1
And get Address data obtained by the signal processing unit 5
And the synchronization signal are sent to the system controller 9. What
For error correction processing performed by the signal processing unit 5 and the like.
The details will be described later. Here, the reproduction data is, for example, MPEG
Data that is compressed and encoded at a variable transfer rate
In this case, in the optical disc device of this embodiment, the data is
64 Mbytes of D-RAM (track buffer memory)
7) temporarily store the track buffer memory
7 by controlling the writing / reading of the
To absorb the time variation of the variable transfer rate of data
ing. The track buffer memory used is
A buffer memory that temporarily stores compressed data.
Shown, typically provided in DVDs, for example.
Buffer memory to absorb variable transfer rate
Or a buffer used when encoding or decoding MPEG
Memory. Storage of this track buffer memory 7
Management of capacity and storage area, write / read control,
For example, the system controller 9 is connected via the signal processing unit 5
Do. AV encoding / decoding during reproduction of the optical disk 1
The unit 6 reproduces the data supplied from the track buffer memory 7
The data is compressed and encoded by, for example, MPEG2 and
Audio data and video data are multiplexed data.
At some point, this multiplexed compressed audio data and
Separate compressed video data and convert each to MPEG
2 to decompress and decode, and then D / A (digital / analog
Log) convert to audio and video signals
Output from terminal 11. The video output from this terminal 11
The video signal is transmitted from an NTSC (National Televisio) (not shown).
n System Committee) Monitored by encoder
The audio signal is displayed on the
The sound is sent to the car etc. and emitted. Please note that during this playback
Speed of decompression decoding by the AV encoding / decoding unit 6 (decompression decoding)
Data transfer rate at the time of encryption, hereafter referred to as decompression rate
Is the recording mode set at the time of recording, which will be described later.
Is set according to the expansion rate. In other words, AV mark
The decoding / decoding unit 6 performs decompression decoding according to a plurality of decompression rates.
Can be processed, and the recording set at the time of recording
The expansion rate is determined according to the mode, and at that rate
Perform decompression decoding. This recording mode information is
Recorded on the optical disc 1 together with recording data as rule data
And the control data is stored on the optical disc 1.
Read during playback and sent to system controller 9
The system controller 9 sends this control data
The expansion rate of the AV encoding / decoding unit 6 based on the
You. The D / A conversion is performed by the AV encoding / decoding unit 6.
It is also possible to do it externally. On the other hand, for example, signal recording on the optical disc 1
Is performed, a recording start command is issued from the key input unit 10.
The system controller 9 responds to the recording start command.
Controls the amplifier 4, servo 8 and driver 7 accordingly
I do. That is, when signal recording on the optical disc 1 is performed,
First, while rotating the optical disc 1,
A laser spot onto the optical disk 1 and
Pre-pits are formed in advance on signal tracks on disk 1.
Reads the address signal that is
Find the target sector (track) to be recorded, and
Laser spots on target sectors (tracks)
The optical head 3 is moved so as to perform the operation. Note that the optical
The details of the address signal recorded in advance on the disk 1
This will be described later. From the terminal 11, the audio to be recorded is recorded.
Audio and video signals are input and these signals are
Sent to the decryption unit 6. When recording on the optical disc
The AV encoding / decoding unit 6 outputs an audio signal and a video signal.
A / D-converts the video signal and outputs audio data and
Video data at a speed corresponding to the recording mode described later.
Performs MPEG2 compression encoding and multiplexes them.
And sends it to the signal processing unit 5. Hereinafter, this AV encoding / decoding
Compression encoding speed in the encoding unit 6 (data at the time of compression encoding).
Data transfer rate) is called a compression rate. Sand
That is, the AV encoding / decoding unit 6 includes a plurality of
Compression encoding at a compression rate of The D-RAM 8 of 16 Mbytes stores A
When the data is compressed and decompressed by the V encoding / decoding unit 6,
This is a memory for temporarily storing. This D-RAM8
May have a capacity of 64 Mbytes. Ma
The A / D conversion is performed outside the AV coding / decoding unit 6.
It is also possible to carry out. Further, the apparatus of the present embodiment can
In addition to information, still image information and program files on the computer
It is also possible to record and reproduce data such as files. This
In the case of, the still image information and the professional
Data such as gram files are supplied, and these data
Sent to the signal processor 5 via the system controller 9
You. The signal processing unit 5 at the time of recording on the optical disc is
Is the compressed data or system from the AV encoding / decoding unit 6.
Data such as program files via controller 9
To the NRZ and EFM +
Encoding, and then the system controller 9
Generates recording data by adding the synchronization signal supplied from
You. Here, the recording data is track-backed.
To the optical disk 1 after being temporarily stored in the
At the read rate corresponding to the recording rate of the
It is read from the memory 7. In addition,
Storage capacity of the track buffer memory 7 at the time of this recording
Management of amount and storage area, details of write / read control
Will be described later. This track buffer memory 7
The recording data read from the
Modulation processing is performed and sent to the amplifier unit 3 as a recording signal.
And the target sector on the optical disk 1 by the optical head 3
(Track). At this time, the system controller 9
Indicates that the jitter value from the amplifier unit 4 is A / D (analog / de
Digital) conversion and measurement.
The waveform compensation in the amplifier unit 4 during recording is performed according to the measurement value.
Change the positive amount. That is, a signal is recorded on the optical disc 1.
In this case, the amplifier unit 4 converts the signal from the signal processing unit 5
The waveform is corrected, and the waveform-corrected signal is
Sent to the user drive circuit. Next, the data on the optical disc 1 according to the present embodiment will be described.
The address of the data area will be described below. The optical disc 1 is a DVD video or DVD
Audio, DVD-ROM, etc.
This is a DVD-RW disc conforming to the standard. This D
Not only VD-RW, but also write-once and rewritable optical discs
In general, addresses can be controlled during recording.
Sector addresses are pre-recorded on the disc
Or it is formed. However, the existing light
In a disc, a frequency modulated based on address data
By wobbling the groove according to the wave number
Although the address is recorded, the DVD of the present embodiment is
-RW enables higher-speed and higher-density recording.
Therefore, it is shared with the wobbling frequency signal of the groove.
Then, a predetermined pit is formed in the land on the optical disk.
So-called LPP (land pre-pit) address system
Is also adopted. Here, the data is actually written to the optical disc 1.
When performing data recording, the data previously recorded on the optical disc 1 is
To the LPP address which is also the recording timing signal
Sector address (hereinafter simply referred to as LPP address).
), The security information contained in the recorded data actually recorded
Data address (hereinafter referred to as data address)
It is common to do. Note that, in this manner, the LPP
An example of data recording where the address and data address match
For example, data reproduced from a normal DVD
Recording on DVD-RW.
Wear. In this case, the DVD-RW disc
Data will be recorded subsequently,
A state in which the relationship between the LPP address and the data address matches
Can be in a state. Next,PostscriptThe recording operation is explained below
I do.FIG.As shown in FIG.
One ECC block with 16 data sectors (32 kByte)
This ECC block is used for recording and playback.
It is the smallest basic unit. Also, each data sector
Is an address composed of LPP and a sink for recording.
26 syncs recorded in synchronization with the
Sync frame. In addition, DVD-
In the RW, the addresses of the sectors are formed at predetermined intervals.
Has been established. Here, as shown in FIG.
Like intermittent recording using the track buffer memory 7
After the previously recorded area (data area)
When newly recording continuous data,
Discontinuous data at the joint between the pre-recording and post-recording
Becomes Therefore, the effect of the data discontinuity is minimized.
For example, as shown in FIG.
Of the first sector (physical sector, first sector)
One byte of the third sync frame (3rd sync frame)
Bring the joint position to the third byte from the
To In other words, the linking position
Linking position for performing (linking)
You. The third sink where the linking position L exists
The frame becomes a linking frame and the link
The leading sector including the linking frame is the linking sector.
Becomes As described above, continuous data recording is discontinuous.
To avoid the effect of the discontinuous part
Then, linking is performed at that position. EC recorded before
ECC blocks to be newly recorded for C block
To connect continuously, the first section of the ECC block
Between the first and third bytes of the third sync frame of the
Linking position, no data loss due to linking
In order to achieve this, the second sync frame (2nd sync frame)
Frame), some of the data
Data to be duplicated, and
Over light. The method shown in FIG.
The error correction data of the ECC block is
Data (PI, PO) is generated, and then the previous EC
Following the C block, the first, second,
LP up to the third sync frame sy1, sy2, sy3
Timing of P sync signal (sink shown in FIG. 7 (A))
The data is recorded on the basis of the third sync signal.
Recorded 3 bytes signal for overwriting
At this point, data recording is suspended. Then,
A predetermined amount of data to be recorded in the buffer memory 7
At that point, pick up 3 again on the ECC block
Position and match the third sync signal of the ECC block.
Detecting the timing of the corresponding third sync signal of the LPP,
The overwriting is performed based on this timing.
Overwrite 3 byte signal (linking position L) again
And record the subsequent data continuously.
It becomes possible now. When implementing the method of FIG. 7,
In order to perform the above overwriting, some data is duplicated.
It is necessary to duplicate the data part of the connection
Processing will be performed. The linking position L indicates the recording timing signal.
Immediately after the LPP sync signal (third sync signal)
Yes, because the recording timing can be generated accurately,
The range of linking positions for the current linking method
Can be reduced, and there is no phase
The accuracy of the signal can be improved,
It is possible to reduce the loss area due to tuning. However, even in the method shown in FIG.
Returning destroys a few bytes of the linking part,
Due to discontinuity in phase and frequency before and after this recording,
The worst case during the stabilization time of the road PLL circuit etc.
Can read from a few bytes to hundreds of bytes in the linking part
The problem of disappearing occurs. From the above, the lead of the optical disc 1 is
Inside the doin area, for example a so-called recording
A management data area is set in the management area (RMA).
In the management data area, the linking position L at the time of recording is set.
Is recorded, and at the time of later reproduction, the management data
Based on the information indicating the linking position L of the data area.
Processing (such as response characteristics for linking)
Change or window switching process)
Basically, there is no loss of data, and it is a joint between records.
This makes it possible to avoid the effect of data discontinuity. In addition,
Information indicating the linking position L is stored in the management data area.
Of which, the address of the start position and end position of data recording,
Alternatively, record the interval between the start position and end of data recording.
It is recorded separately from the area where Also, the linking position
The information indicating L is inside the lead-in area of the optical disc 1.
Not in the recording management area of the
For example, in the data recording area,
It is also possible to record as one of the roll data. This recording operation is performed by the optical disk device shown in FIG.
The upper limit capacity of the track buffer memory 7 (full)
And the value of the lower limit capacity (empty) are set respectively,
The signal compressed by the encoding / decoding unit 6 is converted into a predetermined recording unit.
Temporarily in the 64 Mbyte track buffer memory 7
To the track buffer memory 7 and
While controlling the capacity, the operation of the optical head 3 is controlled.
I have to. For example, when recording on the optical disc 1,
Error correction code is added to the compressed data in the rack buffer memory 7.
, Address and sync signals, and
The laser power is modulated by the lattice circuit and the optical head 3
Is recorded on the optical disc 1 from the beginning. Here, when the recording is continued,
Recording signal transfer rate and recording signal
Track buffer memory 7 according to the difference
When the capacity of the battery reaches the lower limit capacity (empty),
Reading from the rack buffer memory 7 is temporarily stopped,
The linking process is performed on the optical disc 1 and recording is performed.
I will stop. Therefore, in the optical disk device shown in FIG.
For example, in the built-in RAM area of the system controller 9,
ECC for managing the ECC block at the marking position
This ECC block tube has a block management area.
The byte corresponding to the linking position in the
For example, by setting it to “1”, the ECC block at the linking position is set.
The lock address is recorded. Next, the remaining capacity of the track buffer memory 7
Is recovered, and data from the track buffer memory 7 is
When reading becomes possible, the system controller 9
Is the ECC block of the address corresponding to the linking position.
From the linking processRecordResume
To do. By repeating this operation,
Make a record. Next, the recording as described above is performed.
When the optical disc 1 is reproduced, the operation is as follows. This
At the time of the reproduction, first, the record on the innermost circumference of the optical disc 1 is recorded.
The management data area on the
The system data is reproduced and the system
Read the linking byte map from the playback data of That is, the system controller 9
Recorded in the coding management area
Located in coding management data (RMD)
Record starting position of the linking byte map
The address of the recording end position is read out, and the
Recognize the range of the area where the recording was performed. Next, the system controller 9 sets the link
Read out the byte map and store it in the built-in RAM.
Stored in the linking position management area. System
Link controller on the built-in RAM
The linking byte map stored in the management area is
To the address signal detected through the sync detection in the
Based on the converted address.
Compare the current address position with the current address position, and play back next
Whether the ECC block address contains linking
calculate. Here, the system controller 9
Predicted that the regenerating ECC part contains linking
In this case, the information is stored in the signal processing unit 5 or the
To the pump unit 4. In the signal processing unit 5 and the amplifier unit 4,
When you receive linking information,
Changes in response characteristics for linking and
Processing for interpolation such as window switching is performed. What
Details of the processing for interpolation in the signal processing unit 5
Will be described later. Further, in the different embodiments, the resources are more simply
The response characteristics of the ECC section including
To perform interpolation processing such as window switching,
Actually linking with linking byte map like
Specify the ECC block where the
Instead of performing interpolation on the lock,
Where the linking of all ECC blocks is performed
Timing (the linking position and
In this case, by performing the interpolation process,
Linking position management 92 in the stem controller 9
An inexpensive device is feasible without the need. in this case,
For DVD-RW, a playback-only D compatible with playback
Exactly the same ECC like VD-ROM format
For discs having a block structure, DVD-RW
There is no linking because overwriting is not performed as in
Therefore, interpolation processing at the position corresponding to the linking position is necessary
Absent. In such a case, determine the disc type.
The disc type is DVD-R or DVD-RW
The interpolation processing described above is performed only for
To make it a read-only disc.
As a result, it is possible to maintain the same playback performance as before.
You. That is, during reproduction, the linking
It is highly possible that part of the data has been destroyed at position L
Therefore, the data of those bytes is re-
There are places where you cannot live. Against this background, this implementation
In the embodiment, the data (signal) corresponding to the linking position
By taking the special measures described below.
Thus, more reliable reproduction is realized. The data corresponding to the linking position L
As a countermeasure for the first problem, the re-operation corresponding to the linking position L is performed.
Performs the following processing on the raw signal
Thus, a method of realizing a stable reproduction process can be considered. That is, recording is intermittent at the linking position L.
Is performed at the linking position L
The signals before and after the playback signal are amplitude, frequency, phase (time
Timing, asymmetry, quality (jitter, etc.)
May be In addition, missing bytes and unnecessary
Sites can also occur. Therefore, in the optical disk device of the present embodiment,
Is located at the linking position during optical disc playback.
For the corresponding reproduction signal, for example, (1) PLL times
Changing the response characteristics of the road (for example, increasing the response speed),
Alternatively, at the linking position L, for example,
Data may not exist as in
Locking the PLL in the section, (2) Reproduction RF signal
Change the slice level for binarizing the signal (for example,
Change the slice level voltage by inserting a transient waveform),
Or the response of the filter (feedback type low-pass filter)
Change the characteristics (for example, increase the frequency characteristics and response speed
And (3) adjusting the gain of the reproduced RF signal.
Switching response characteristics of AGC (automatic gain control) circuit
(E.g., increase the response speed), (4) Reproduction RF signal
Equalizer (EQ) for adjusting the frequency characteristics of the
Changing the coring characteristics, (5) Linking position
Data exists as in the case of defects
Drive in the servo system in that section
Pre-hold output, (6) at linking position
Is shifted from the previous sync signal due to the recording phase shift.
Then, the timing of the next sync signal will be shifted
A window appears next to the expected sync signal.
Since the sync signal may not be input, the next sync signal
At the timing of
Process to ensure a stable
Realize raw processing. However, as described above, for a normal reproduced signal,
Performing processing such as raising the response characteristics
When playing back an optical disc with scratches,
To cope with the above (1) to (6)
The predetermined processing of the method is the section of the signal corresponding to the linking position
Only. It should be noted that the optical disc device has, for example,
Immediately after seeking to a track or immediately after switching between recording and playback
In addition, for the same purpose, switching of response characteristics as described above, etc.
Since there is a configuration to perform this
To be applied to the playback signal section corresponding to the
Can be. FIG. 8 shows a pair of the above (1) to (6).
Of the main part of the optical disk device to realize the processing method
Excerpted and shown. In the example of FIG. 8, the amplifier section of FIG.
(Preamplifier) 4, signal processing unit 5, servo unit 8, system
The internal controller 9
ing. In FIG. 8, the optical head (PU) 3
The reproduced RF signal from the AGC circuit 41 of the amplifier unit 4
Is entered. In the AGC circuit 41, the optical head 3
Automatic gain adjustment of these reproduced RF signals to a predetermined signal level
Then, the reproduced RF signal after the gain adjustment is supplied to the equalizer 42.
send. 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.
You. In this binarization circuit 43, the re-
The raw RF signal is binarized at a predetermined slice level.
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. this
The binary reproduced signal thus PLL-locked is a signal
It is sent to the processing unit 5. The binary reproduced signal input to the signal processing unit 5
Is first sent to the sync detector 51. This sync detection
In the device 51, the above-described FIG.
The sink H # shown in (D) is a clock signal from the PLL.
Is counted, and at the timing of the next coming sync signal
Generate window signal (Fig. 11 (b)) of sync signal
The sync signal that falls within this window is
The next sync signal in this window.
If not, a sync signal is generated as the interpolation sync.
If this sync signal cannot be obtained, for example, twice
May have shifted the next sync timing,
Increase the sync window to a wider value than before
Control so as to obtain a link signal. Also, I will explain later
Linking at the linking position of the ECC block
When the next sync tie after linking
Linking position management
ECC block information including linking from 92;
Information from address detection 52 and information on sync timing
From the report, linking timing generation 54
The timing signal is sent to the sync detection of 51 and the next cycle is detected.
The operation of expanding the window of the link signal is performed (FIG. 11).
(B4) w4). Also, in different examples, the linking position
There are no 92 management units.
Information from dress detection 52 and sync timing information
From the linking timing generation 54
The timing signal is sent to sync detection 51 and the next
An operation of widening the window of the lock signal is performed (FIG. 11B).
W4). As a result, the sync signal is detected stably,
The timing signal based on the sink is applied to an address detector 5.
2 and a linking timing generator 54. Also,
The dress detector 52 is connected through the sink detector 51.
A playback signal is also sent. In the address detector 52, the relevant
The address included in the playback signal is decoded at the timing of the link.
And sends the address to the system controller 9.
You. Also, the reproduced signal via the address detector 52 is
Is sent to the data processor 53. In the data processor 53, the data
Of an EFM + signal with respect to a reproduced signal which is a digital signal
Decode to tone and NRZ data and correct errors
By performing the normal processing, the reproduction data is generated. ECC block of system controller 9
The address management unit 91 receives the address from the address detector 52.
ECC block address management based on address
The signal processing is performed by the address in the ECC block unit.
Block unit in the data processor 53 of the processing unit 5
Control the data processing of. Also the system controller
9, the linking position management unit 92 includes the address detector 52.
Linking position extracted from address and playback signal
Based on the location information,
Generate a timing signal corresponding to the king position. this
Timing corresponding to the linking position in the ECC block
The linking signal is generated by the linking timing generator of the signal processing unit 5.
Sent to 54. In the linking timing generator 54, the
Timing based on the sink supplied from the ink detector 51
Signal and the linking position tube of the system controller 9
In the ECC block supplied from the controller 92
By the timing signal corresponding to the position, (C) in FIG.
The linking timing signal shown in FIG. Different
In an example, the ECC block of the system controller 9
The address management unit 91 receives the address from the address detector 52.
ECC block address management based on address
The signal processing is performed by the address in the ECC block unit.
Block unit in the data processor 53 of the processing unit 5
Control the data processing of. Also the system controller
9 does not have the linking position management unit 92, and
From output unit 52, linking position in all ECC blocks
And generating a timing signal corresponding to the position. This ECC
Timing signal corresponding to locked linking position
Is transmitted to the linking timing generator 54 of the signal processing unit 5.
Sent. That is, the linking timing generator 5
4 is the reproduction RF signal shown in FIG.
Signal section corresponding to linking position as shown in (A)
"H" and "L" shown in FIG.
A binary linking timing signal is generated. The figure
In the example of FIG. 9, the "L" portion of the linking timing signal
Removes the signal section at the linking position from the reproduced RF signal.
It corresponds to the signal section to output. This linking tab
The imaging signal is supplied to each of the switching control circuits 45 and 4 of the amplifier unit 4.
6, 47, 48 and the hold circuit 81 of the servo circuit 8
Sent. The linking timing generator 54
Syncs the timing signal corresponding to the linking position
Send to detection 51, and sync detection 51
Clock signal, and the next coming linking
Widen the sync window of the sync signal
Control so that a sync signal can be obtained within a certain range. Also,
In a different example, there is no linking position management 92
Information from the address detection 52 in the ECC block
Information and sync timing information, linking time
In the linking generation 54, the linking timing signal
Sent to sync detect and widen window for next sync signal
Perform an action. At this time, the disc type discriminating section 100 records
Only when it is determined that the disc is a recordable disc,
It is good to widen the window at the linking position
No. That is, when the disc is inserted, the
Determine the type. As a result, the disc type becomes read-only
DVD-ROMs do not have linking, so
Control not to extend the window, and
Linking position for DVD-R or DVD-RW
Control to expand the window because there may be
Do. The switching control circuit 45 of the amplifier unit 4 has an AGC
A control circuit for switching control of the response characteristic of the circuit 41,
Section in which the timing signal is “L”.
That is, in the signal section corresponding to the linking position, the reproduction RF
Control is performed to increase the response speed of AGC to signals, for example.
U. The switching control circuit 46 of the amplifier section 4
With a control circuit that changes the equalizing characteristics of the equalizer
Yes, the linking timing signal is "L"
In the section, that is, the signal section corresponding to the linking position,
A system for changing the equalizing characteristics for the reproduced RF signal
I will do it. The switching control circuit 47 of the amplifier section 4 is binarized.
Change the slice level of the circuit 43 and the response characteristics of the filter
The control circuit controls the linking timing signal.
In the “L” section, that is, in the linking position,
In the corresponding signal section, the slice level for the reproduced RF signal is
Change the voltage of the device or the process to increase the response speed, or
Control to increase the frequency characteristics and response speed of the filter. The switching control circuit 48 of the amplifier unit 4 includes a PLL
A control circuit that changes and controls the response characteristics of the circuit.
Section in which the timing signal is "L",
In the signal section corresponding to the linking position, the PLL circuit
Improve the response speed, or
Data may be disturbed, so P
Control for locking the LL is performed. Further, the servo section 8 includes a focus servo.
Circuit 82, tracking servo circuit 83, and spindle
And a hold circuit.
Reference numeral 81 denotes a track servo circuit and a tracking servo circuit 82.
Drive of the servo servo circuit 83 and the spindle servo circuit 84
When the linking timing signal is "L"
Section, that is, the signal section corresponding to the linking position
Control to output the pre-hold and reference voltage.
You. An optical disk device according to an embodiment of the present invention
By providing the configuration shown in FIG.
In the signal section to be processed,
Can be realized. Each switching system of the amplifier unit 4
The switching control in the control circuits 45, 46, 47, 48
(L) when the timing signal is “L”.
Switching in the signal section corresponding to the
Taking control, or any one of them
Performing only the switching control or the number of such switching controls
In any combination of the two
Good. In this embodiment, the management data area
Data other than the linking position information, such as when recording
Record laser power, ambient temperature, strategy value, etc.
The data before and after the linking position
Can be predicted, and as a result, the first
Response characteristics of each item in the countermeasure
Can be set. Here, from the linking position in FIG.
The worst time for L to pull in is the worst case of the fourth sync frame.
The linking position is ECC
Because it is the first position immediately after the sync signal in the row of lock
In addition, the time until PLL pull-in is sufficiently secured in one row.
With the advantage of not affecting the next column
I have. Note that this linking position is determined in this embodiment.
Then, as the head position of the second column of the row of the ECC block,
But it may be in the third column or later.
May be a position immediately after the appropriate data (CMP). Optimization processing at linking position during reproduction
Another example of the process will be described with reference to FIG. Rin
In the king position, the previous recording data is as shown in FIG.
After the data has been recorded in FIG.
Since the data is recorded as shown in FIG.
As shown in the figure, there is a discontinuity at the linking position.
For playback, the link in the error correction block
The timing corresponding to the timing is generated.
Based on the linking position (for example, FIG. 11
(A) or the vicinity indicated by w in (a)) or after
(For example, the period indicated by w4 in FIG.
It is necessary to optimize the reproduced information signal (in the vicinity of the above).
Optimization control includes before and after the linking position (for example,
For example, in the period indicated by w in FIG.
Is at least one of (a) to (e) shown below.
One process or a plurality of processes are performed. (A) the response characteristics of the PLL circuit for the reproduced information signal;
Slice level for binarizing the raw RF signal, (c)
AGC (automatic gain) for adjusting the gain of the reproduced RF signal
Control) circuit response characteristics, (d) frequency characteristics of reproduced RF signal
Equalizer (EQ) for adjusting the quality
Characteristics, (e) Servo drive output hold Further, after the linking position,
The arrival position of the sink is shifted as shown in FIG.
Then, control the window of the sync signal.
Is, for example, in the period indicated by w4 in FIG.
Is performed to widen the window. The disc type discriminating section 100 is a recording disc.
(DVD-RW, DVD-R, etc.) and read-only disc
(DVD-ROM, etc.)
In this case, an example of optimizing near the linking position is explained.
As another example, as another example, the data shown in FIG.
Recording on a recordable disc in the disc type discriminating section 100
Determines the difference in playback characteristics, etc., and determines the type of recording medium
Optimization control is performed in accordance with the determination result of (recording / reproduction characteristics).
That is, for example, the above-described optimization processes (a) to (e)
Are selected and combined based on the result of disc type discrimination.
Window of the sync signal window w4
Variable width setting based on disc type discrimination result
It is also possible. In the above description, the linking by
An example using a link map was explained, but the linking bit
It is also possible to use a map. [0111] As described above, according to the present invention,
A specific sync buffer in a specific sector of the error correction block
Frame (for example, the first sector3In sync frame
Near the leading end of the data area, specifically, this data area
3 bytes from the first byte to the third byte of the area, or
Is from the 1st byte to the 10th byte of this data area
Linking part (linking position)
Information), and record additional information after that.
Information that can be connected and played back with additional information
recoding mediaPlayback methodCan be provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows E in recording information recorded on a DVD-RW.
It is a figure showing the structure of 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 a recording medium. FIG. 6 is a block diagram illustrating a schematic configuration of an optical disk device. FIG. 7 is a diagram for explaining the relationship between the configuration of an ECC block and linking. FIG. 8 is a block diagram illustrating a configuration of a main part when a first coping method of the optical disc device is realized. FIG. 9 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. FIG. 10 is a block diagram showing another configuration of a main part when the first coping method of the optical disc device is realized. FIG. 11 is a diagram for explaining processing at a linking position. [Description of Codes] 1 ... optical disk (recording medium), 2 ... spindle motor, 3 ... optical head, 4 ... amplifier section, 5 ... signal processing section, 6 ... AV encoding / decoding section, 7 ... track buffer memory, 8 ... 16 Mbyte D-RAM, 9 ... System controller, 10 ... Key input unit, 11 ... Input / output terminal for audio and video signals, 12 ... Control data input terminal, 13 ... ATAPI interface unit, 100 ... Disk type discrimination unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ identification code FI H04N 5/85 H04N 5/92 H 5/92 G11B 27/02 K (58) Investigated field (Int.Cl. ⁷ , DB name ) G11B 20/10 G11B 7/0045 G11B 20/12 G11B 27/00 H04N 5/92

Claims (1)

(57) [Claim 1] When information is recorded in error correction block units, a linking position which is a recording end position or a head position of additional recording is set to a specific position in the error correction block. an information recording medium provided on said error correction block consists of a predetermined number of sectors, each sector is composed of a sync frame that includes a sink predetermined number, the data and parity in a plurality of said sync frames And a vertical correction block composed of data and parity spanning a plurality of the sync frames, wherein the linking position is the first of a plurality of the horizontal correction blocks of the plurality of the sync frames. wherein the information recording medium is provided near the top position of the data area of the sync frame, information for reproducing the information A recording medium playback method, error correction Bro to be reproduced from the said information recording medium
A first step of detecting an address of a block, and a position corresponding to a linking position of the error correction block.
In the linking position set in the second step,
At a corresponding position, a third switch for changing the characteristics of the reproduction circuit
Information recording medium reproduction method characterized by having a step
Law.