JP2001216720A - Optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a time up to starting the read even when a change destination area of a secondary change of an optical disk is collected to a specified place. SOLUTION: A CPU 25 of an optical disk device reads in continuously the data from the change destination area of the optical disk 1 at a start operation time when the optical disk 1 is inserted, or when the start operation by a command occurs to store them in a RAM 21, and the read is specified from a host not shown in figure, and when the optical disk 1 is satisfied to the secondary change (SDL) while reading in the user area of the optical disk 1, the CPU 25 retrieves the presence of a sector specified to the RAM 21 storing the data of the change destination area, and transfers the data of the change destination from the RAM 21 in the case of specifying.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a DVD-RA
The present invention relates to an optical disk device that records data on an optical disk such as M or reproduces recorded data.

[0002]

2. Description of the Related Art Conventionally, in an optical disk apparatus that handles a rewritable optical disk of the constant linear velocity (CLV) or zone division type constant linear velocity (ZCLV), when recording data is read from a target sector or when a target sector is read. When recording data, it is necessary to move the pickup head to a radial position of a track including the sector. At this time, the rotation speed of the optical disk is changed in order to keep the frequency of the recording signal constant. In other words, since the circumference is long at the outer circumference of the disk, it is necessary to lower the rotation speed at the inner circumference, and to increase the rotation speed at the inner circumference.

[0003] The radial movement of the pickup head is
The operation is completed in a short time compared to the stability of the changed rotation speed, but the reproduction operation and the recording operation cannot be performed until the rotation speed falls within the allowable range of the capture range of the PLL circuit and the cutoff frequency of the waveform equivalent circuit.

In an optical disk provided with a secondary replacement area of a rewritable optical disk, a read (RE)
If the secondary replacement (SDL) exists within the range of AD), the data in the user area starts to be read, and when the data falls under the SDL, seek (SEEK) to the replacement destination and read. After the end of the read operation at the replacement destination, the read operation is continued by seeking the original user area to read the continuation of the user area. If an SDL exists, the above operation is repeated.

In the above-described read from the user area to the spare area and from the spare area to the user area, an optical disc in which an SDL spare area is secured in each zone by a zone division type constant linear velocity system (ZCLV). Then, when seeking to the replacement destination, there is no rotation change,
The time until the start of reading is determined by the access time.

However, when the replacement area of the SDL is located in a specific location, the rotation is changed. Therefore, the time required to start reading is much longer than that of an optical disk in which the replacement area of the SDL is secured in each zone. The transfer rate of the read greatly decreases.

When the SDL exists within the range to be read, the data in the user area starts to be read.
When L is met, seek to the replacement destination and lead. After the end of the read operation at the replacement destination, the read operation is continued by seeking the original user area to read the continuation of the user area. In the above-described read from the user area to the replacement area and the read from the replacement area to the user area, the SDL replacement area is gathered at a specific location by the zone division constant linear velocity method (ZCLV). Took a long time to start reading because of the change in rotation.

That is, at the time of reading, a seek is performed between the user data area and the replacement area every time the data falls under the SDL, and a rotation change occurs. Therefore, it takes a long time to start reading, and the transfer rate of the read decreases.

[0009]

As described above, in the reading from the user area to the replacement area and the reading from the replacement area to the user area of the optical disk, the zone division type constant linear velocity (ZCLV) is used. Secondary replacement (SD
When the replacement destination area in L) is located at a specific location, a rotation change is involved, so that there is a problem that it takes time to start reading.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical disk apparatus capable of reducing the time required to start reading even when the secondary replacement area of the optical disk is located at a specific location. .

[0011]

SUMMARY OF THE INVENTION An optical disk apparatus according to the present invention has a groove and a land track for recording spiral or concentric data, and is composed of a fixed length of groove and land, and is provided with a synchronization given to a head portion. It has a plurality of sectors each consisting of a header section composed of codes and address data and a recording area in which data is recorded, and has a secondary replacement in a user area composed of a plurality of zones for each of the plurality of tracks and a specific combined location In a state where an optical disk provided with a replacement area in which replacement data of a sector is recorded in advance is rotated at a different number of revolutions for each zone, data is recorded on the optical disk or recorded on the optical disk. Operation when inserting the optical disk or starting operation by command in the optical disk device that reproduces the data A first control unit for continuously reading replacement destination data of a secondary replacement sector stored in a replacement destination area provided on the optical disk and storing the replacement destination data in a predetermined storage unit; And a second control means for performing control to transfer the replacement destination data of the corresponding sector by searching the storage section when a secondary replacement sector is detected during data reading of the area.

The optical disk device of the present invention has a groove and a land track for recording spiral or concentric data, and is composed of a fixed length groove and a land, and is composed of a synchronization code and address data given to a head portion. It has a plurality of sectors consisting of a header part and a recording area where data is recorded, and a user area consisting of a plurality of zones for each of the plurality of tracks and a replacement destination data of a secondary replacement sector in a specific grouped place. In a state where an optical disk provided with a pre-recorded replacement area is rotated at a different rotation speed for each zone, data is recorded on the optical disk or data recorded on the optical disk is reproduced. In the optical disk device, when the start operation at the time of the insertion of the optical disk or the start operation by the command, the optical Control means for continuously reading the replacement data of the secondary replacement sector stored in the replacement destination area provided in the storage area and storing the replacement data in a predetermined storage unit; When the storage capacity of the storage unit is exceeded, the storage unit is terminated when the storage capacity of the storage unit is full.

The optical disk device of the present invention has a groove and a land track for recording spiral or concentric data, and is composed of a fixed length of groove and land, and is composed of a synchronization code and address data given to a head portion. It has a plurality of sectors consisting of a header part and a recording area where data is recorded, and a user area consisting of a plurality of zones for each of the plurality of tracks and a replacement destination data of a secondary replacement sector in a specific grouped place. In a state where an optical disk provided with a pre-recorded replacement area is rotated at a different rotation speed for each zone, data is recorded on the optical disk or data recorded on the optical disk is reproduced. In the optical disk device, when the start operation at the time of the insertion of the optical disk or the start operation by the command, the optical Control means for continuously reading the replacement data of the secondary replacement sector stored in the replacement destination area provided in the storage area and storing the replacement data in a predetermined storage unit; Means for ending the storage operation under the control of the control means when the storage capacity of the storage section is full when the storage capacity of the storage section is exceeded, and secondary replacement during data reading of the user area of the optical disk. A search unit for searching for the presence or absence of a corresponding sector in the storage unit when a sector is detected; a transfer unit for transferring replacement data of the corresponding sector from the storage unit when the search unit can search; And reading means for reading replacement data of a corresponding sector from a replacement area provided on the optical disk when the search cannot be performed by the search means.

The optical disk device of the present invention has a groove and a land track for recording spiral or concentric data, is composed of a fixed length of groove and land, and is composed of a synchronization code and address data assigned to a head portion. It has a plurality of sectors consisting of a header part and a recording area where data is recorded, and a user area consisting of a plurality of zones for each of the plurality of tracks and a replacement destination data of a secondary replacement sector in a specific grouped place. In a state where an optical disk provided with a pre-recorded replacement area is rotated at a different rotation speed for each zone, data is recorded on the optical disk or data recorded on the optical disk is reproduced. In the optical disk device, when the optical disk is started by the command from the host, the host is temporarily And reporting means for reporting the command end,
After reporting the end of the command by the reporting means, the storage means continuously reads and stores the replacement data of the secondary replacement sector stored in the replacement destination area provided on the optical disk.

[0015]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an optical disk device. This optical disk device uses an optical disk (DVD-RA
M) Recording data on the optical disk 1 and reproducing data from the optical disk 1.

This optical disk device is configured as a device capable of reading data not only from a DVD-RAM but also from other DVD disks and CD disks, and writing data into a rewritable DVD disk. .

Therefore, the optical pickup 2 is a DVD
And an objective lens 4 for CD. In the optical pickup 2, a DVD objective lens 3 is provided.
DVD and CD corresponding to the objective lens 4 for DVD and CD
A semiconductor laser unit (not shown) is provided, and one of the semiconductor laser units is selected according to whether the loaded optical disk 1 is a DVD disk or a CD disk, and is energized by a laser control unit 5 to correspond to each other. A laser beam having a predetermined wavelength. When either the DVD or CD semiconductor laser unit is selected and energized, the laser beam corresponding to the optical disk 1 is directed to the corresponding objective lens 3, 4, and the objective lens 3, 4 causes the laser beam to be directed to the optical disk 1. Converges. Data is written to or reproduced from the optical disc 1 by the converged laser beam.

The setting of the laser control unit 5 is set by the DVD data processing unit 6. The setting includes a reproduction mode for obtaining a reproduction signal, a recording mode for recording data, an erasing mode for erasing data, and a DV mode.
The DVD mode for executing data processing on the D disk and the CD mode for executing data processing on the CD disk are different. That is, in the DVD mode, the DVD
The semiconductor laser unit for CD is selected and energized, and in the CD mode, the semiconductor laser unit for CD is selected and energized. The laser beam for DVD or CD has three modes: playback mode, recording mode, and erasing mode.
The semiconductor laser unit is energized by the laser control unit 5 so that the two modes have different levels of power and generate a laser beam having a power corresponding to the mode.

The DVD disk or the CD is arranged so that the DVD disk 1 or the CD disk is arranged to face the DVD objective lens 3 and the CD objective lens 4.
The disk is transported into the apparatus by the tray 7 directly or stored in the disk cartridge 1a. A tray motor 8 for driving the tray 7 is provided in the apparatus. Also, the loaded DVD disk 1 or C
The D disk is rotatably held on a spindle motor 10 by a stamper 9.
Rotated by

The optical pickup 2 has a photodetector (not shown) for detecting a laser beam therein. This photodetector is reflected by the optical disc 1 and the objective lens 3,
4 to detect the laser beam returned. A detection signal (current signal) from the photodetector is converted into a voltage signal by a current / voltage converter (I / V) 12, and this signal is supplied to a reference amplifier (RF amplifier) 13 and a servo amplifier 14. . The reference amplifier 13 outputs to the DVD data processing unit 6 a tracking error signal for reproducing data in the header section 51 described later and an addition signal for reproducing data in the recording area 58. In the DVD mode, the servo signals (track error signal and focus signal) from the servo amplifier 14 are DV signals.
The signal is output to the D servo seek control unit 15, and is output to the CD servo seek control and CD data processing unit 16 in the CD mode.

As a method for optically detecting the amount of defocus, there is, for example, the following method.

[Astigmatism Method] An optical element (not shown) for generating astigmatism is arranged on a detection optical path of a laser beam reflected by a light reflection film or a light reflection recording film of the optical disk 1, and light is detected. This is a method for detecting a change in the shape of laser light applied to the vessel. The light detection area is divided into four diagonally. For the detection signal obtained from each detection area, DVD
The difference between the diagonal sums is obtained in the servo seek control unit 15 to obtain a focus error detection signal (focus signal).

[Knife Edge Method] This is a method of arranging a knife edge that asymmetrically shields a part of the laser light reflected by the optical disk 1. The light detection area is divided into two parts, and a difference between detection signals obtained from each detection area is obtained to obtain a focus error detection signal.

Usually, either the astigmatism method or the knife edge method is employed.

The optical disc 1 has spiral or concentric tracks, and information is recorded on the tracks.
Information is reproduced or recorded / erased by tracing the converged spot along this track. In order to stably trace the focused spot along the track, it is necessary to optically detect the relative displacement between the track and the focused spot.

The following method is generally used as a track shift detecting method.

[Differential Phase Detec
Option) Method] A change in the intensity distribution of the laser light reflected by the light reflecting film or the light reflecting recording film of the optical disk 1 on the photodetector is detected. The light detection area is divided into four on a diagonal line. The difference between the diagonal sums of the detection signals obtained from the respective detection areas is calculated in the DVD servo seek control unit 15 to obtain a track error detection signal (tracking signal).

[Push-Pull Method] A change in intensity distribution of a laser beam reflected by the optical disk 1 on a photodetector is detected. The light detection area is divided into two parts, and a track error detection signal is obtained by taking the difference between the detection signals obtained from each detection area.

[Twin-Spot Method] A diffractive element or the like is arranged in a light transmission system between the semiconductor laser element and the optical disk 1 to split the light into a plurality of wavefronts and irradiate the ± 1st-order diffracted light onto the optical disk 1 The change in reflected light amount is detected. A light detection area for individually detecting the reflected light amount of the + 1st-order diffracted light and the reflected light amount of the -1st-order diffracted light is arranged separately from the light detection area for detecting the reproduction signal, and a difference between the respective detection signals is calculated to obtain a track error detection signal. Get.

In the DVD mode, a focus signal, a tracking signal and a feed signal are sent from the DVD servo seek control unit 15 to the focus and tracking actuator driver and the feed motor driver 17,
The focus servo control and tracking servo control of the objective lenses 3 and 4 are performed by the driver 17.

Further, the driver 17 responds to the access signal.
Is supplied to the feed motor 11 to control the conveyance of the optical pickup 2.

This DVD servo seek control unit 15
Are controlled by the DVD data processing unit 6.
For example, an access signal is supplied from the DVD data processing unit 6 to the DVD servo seek control unit 15 to generate a feed signal.

The spindle motor driver 18 and the tray motor driver 19 are controlled by a control signal from the DVD data processing unit 6, the spindle motor 10 and the tray motor 8 are energized, and the spindle motor 10 is rotated at a predetermined speed. The tray motor 8 controls the tray appropriately.

A reproduction signal corresponding to the data of the header section 51 supplied to the DVD data processing unit 6 is supplied to a CPU 25 described later. Thereby, the CPU 25
Determines the sector number as an address of the header section 51 based on the reproduced signal, and compares it with the sector number as an address to access (record data or reproduce recorded data). I have.

The reproduction signal corresponding to the data in the recording area 58 supplied to the DVD data processing unit 6 is stored in the RAM 2
0 is stored in the DVD data processing unit 6, and the necessary data is stored in the DVD data processing unit 6.
SCSI interface control unit having M21 and C
The reproduction processing signal is supplied to the D-ROM decoder 22 and supplied to another device, for example, a personal computer via the SCSI.

In the CD mode, a focus signal from the CD servo seek control and the CD data processing unit 16
The tracking signal and the feed signal are sent to the focus and tracking actuator driver and the feed motor driver 17, and the driver 17 performs focus servo control of the objective lenses 3 and 4 and also performs tracking servo control.

Further, the driver 17 responds to the access signal.
Is supplied to the feed motor 11 to control the conveyance of the optical pickup 2. The spindle motor driver 18 and the tray motor driver 19 are controlled by a control signal from the CD servo seek control and the CD data processing unit 16.
Is controlled, the spindle motor 10 is energized, and the spindle motor 10 is rotated at a predetermined rotation speed.
The reproduction signal supplied to the CD data processing unit 16 is
The data is processed by the processing unit 16 and output via the CD data output amplifier 23.

Each unit shown in FIG. 1 is controlled by the CPU 25 in accordance with the procedure stored in the ROM 24. RA
M26 is used as a memory of the CPU 25.

Next, the structure of the DVD-RAM optical disk 1 created above will be described.

The optical disk 1 has a thickness of, for example, 0.6 m.
m, a disc-shaped substrate made of a transparent resin such as polycarbonate or acrylic, a phase-change recording film, a reflective film, a protective film, and a sheet or adhesive for bonding. Grooves and header information are recorded in an irregular shape on a transparent substrate, a recording film or the like is formed on the irregular surface, and then the irregular surfaces are adhered to each other so that recording and reproduction can be performed on both surfaces.

As shown in FIGS. 2 and 3, the optical disk 1 is composed of a pre-pitted (embossed pit) row indicating a wobbled groove for tracking and a track address in advance.

That is, the tracking groove is wobbled at a constant cycle in order to obtain a reference signal for data recording. At this time, the phase of the signal for wobbling the header section 51 and the tracking groove at a constant period is made to substantially match.

The header portion 51 first wobbles outward, then wobbles inward, and the wobbles of the tracking groove also wobbles outward, and then wobbles inward.

As shown in FIGS. 4 and 5, the optical disc 1 has a data zone 46 rewritable with the emboss data zone 45 of the lead-in area 42, zones 43a,. The readout area 44 includes data zones. The clock signal for each zone is the same, and the rotation speed (speed) of the optical disc 1 and the number of sectors for each track are different for each zone.

The lead-in area 42 has a plurality (189
6) An emboss data zone 45 composed of tracks and a rewritable data zone 46 composed of a plurality of tracks. The emboss data zone 45 includes a blank zone, a reference signal zone, a blank zone, a control data zone, and a blank zone. In the emboss data zone 45, reference signals and control data are recorded at the time of manufacturing. The rewritable data zone 46 includes a guard track zone, a disk test zone, a drive test zone, a disk identification data zone, and a replacement management zone as a replacement management area.

The data area 43 has a plurality (1) in the radial direction.
888), for example, 24 zones 43a,... 43x. However, only the zone 43a has 1888 tracks including the rewritable data zone 46.

The lead-out area 44 has a plurality (144
6) The track is a rewritable data zone similar to the rewritable data zone 46, and can record the same contents as the data zone 46.

Zones 43a,... 43 of the data area 43
In x, the number of rotations (speed 39.78 to 16.91H
z) becomes slow, and the number of sectors per track (17 to 4)
0) increases.

The zones 43a of the data area 43,...
As shown in FIGS. 4 and 5, the 43x track has an ECC (error correction cod) as a data recording unit.
e) Block data unit (for example, 38688 bytes)
Each time, data is recorded.

The ECC block is composed of 16 sectors in which 2 Kbytes of data are recorded. For each sector, two 4-byte (32-bit) sector IDs (identification data) 1 to ID16 as address data are 2 bytes. A horizontal ECC (error) is added to main data (sector data) together with an error detection code (IED: ID error detection code) of the configuration and serves as an error correction code for reproducing data recorded in an ECC block.
correction code) 1 and ECC2 in the vertical direction are recorded. These ECCs 1 and 2 are
The error correction code is added to the data as a redundant word in order to prevent the data from being unable to be reproduced due to the defect of the data.

Each sector is composed of 172 bytes of 12 rows of data, and each row (line) is provided with a 10-byte horizontal ECC1.
A vertical ECC2 for one row of a 2-byte configuration is provided. Thereby, the error correction circuit (not shown)
The error correction process for each line is performed using the horizontal ECC1, and the error correction process for each column is performed using the vertical ECC2.

When the ECC block is recorded on the optical disc 1, byte synchronization is required when data is reproduced at a predetermined data amount of each sector (each predetermined data length interval, for example, 91 bytes: 1456 channel bits). Synchronization code to take (2 bytes: 32 channel bits)
Is given.

Each sector is composed of 26 frames from the 0th frame to the 25th frame, and a synchronization code (frame synchronization signal) given to each frame is:
A specific code (1 byte:
16 bits) and a common code (1 byte: 16 channel bits) common to each frame.

The zones 43a of the data area 43,...
As shown in FIGS. 4 and 5, a header section 51,..., In which a sector number or the like as an address is recorded for each sector, is pre-formatted on the 43x track.

The header section 51 is formed when the groove is formed. This header section 51
Is composed of a plurality of header areas 52 composed of a plurality of pits, as shown in FIGS.
3 is preformatted as shown in the figure, and the center of the pit is located on the same line as the center of the amplitude of the boundary line between the groove 53 and the land 54. FIG. 6 shows a header section 51 added to the first sector of each track, and FIG. 7 shows a header section 51 added to a sector in the middle of each track.

In this case, the headers for the grooves and the headers for the lands are formed alternately (in a staggered manner).

The format for each sector is shown in FIG.
Is shown in

In FIG. 8, one sector is composed of 2697 bytes (bytes), a 128-byte header area (corresponding to the header section 51) 51, a 2-byte mirror area 57,
It is composed of a recording area 58 of 2567 bytes.

The channel bits recorded in the sector have a format in which 8-bit data is modulated into 16-bit channel bits by 8-16 code.

The header area 51 is an area where predetermined data is recorded when the optical disc 1 is manufactured. The header area 51 includes four header 1 areas, two header areas, three header areas, and four header areas.

The header 1 area to the header 4 area are composed of 46 bytes or 18 bytes, and a 36-byte or 8-byte synchronization code part VFO (Variable Frequency O).
scillator), 3-byte address mark AM (Addres
s Mark), 4-byte address part PID (Position Ide)
ntifier), 2-byte error detection code IED (ID Err
or Detection Code) 1 byte postamble PA
(Postambles).

The header 1 area and the header 3 area have a 36-byte synchronization code section VFO1, and the header area 2 and the header 4 area have an 8-byte synchronization code section VFO2.

The synchronization code portions VFO1 and VFO2 are regions for pulling in the PLL, and the synchronization code portion VFO1 converts the continuation of “00010001.
6 "bytes (576 bits of channel bits) are recorded (patterns at constant intervals are recorded), and the synchronization code portion VFO2 is" 00010001 "in channel bits.
.. Are recorded for "8" bytes (128 bits of channel bits). The synchronous code portion VFO1 has a so-called 4T continuous pattern.

The address mark AM is a "3" byte synchronization code indicating where the sector address starts. The pattern of each byte of this address mark AM is “0001000100000000000000000
01000100000000000000010001 "
A special pattern that does not appear in the data portion is used.

The address sections PID1 to PID4 are areas in which a sector number as a 4-byte address is recorded. The sector number is a physical sector number as a physical address indicating a physical position on a track of the optical disc 1. Since this physical sector number is recorded in a mastering process, it cannot be rewritten.

The address part PID (1-4) is composed of 1-byte (8-bit) sector information and 3-byte sector number (physical sector number as a physical address indicating a physical position on a track). Have been. The sector information includes a 2-bit reserved area and a 2-bit physical I
It is composed of a D number area, a 3-bit sector type area, and a 1-bit layer number area.

The physical ID number is, for example, “1” in the case of PID1, and is a number indicating the number of the four times overwriting in one header section 51.

In the sector type area, codes indicating the first sector, the last sector, and the like in the track are recorded.

The error detection code IED is an error (error) detection code for the sector address (including the ID number).
It is possible to detect the presence or absence of an error in the read PID.

The postamble PA includes state information necessary for demodulation, and also has a role of adjusting the polarity so that the header section 51 ends with a space.

The mirror area 57 is used for offset correction of a tracking error signal, timing generation of a land / groove switching signal, and the like.

The recording area 58 has a gap area of 10 to 11 bytes, a guard 1 area of 20 to 27 bytes, and a V area of 35 bytes.
FO3 area, 3-byte pre-synchronous code (P
S) area, data area of 2418 bytes, postamble 3 (PA3) area of 1 byte, guard 2 area of 48 to 55 bytes, and buffer area of 24 to 25 bytes.

The gap area is an area where nothing is written.

The guard 1 area is an area provided in order to prevent terminal deterioration at the time of repetitive recording peculiar to the phase change recording medium from reaching the VFO3 area.

The VFO3 area is also an area for PLL lock.
The sequence of “10001000...
5 "bytes (560 bits of channel bits) are recorded.

The PS (pre-synchronous code) area is a tuning area for connecting to the data area.

The data area includes a data ID and a data ID error detection code IED (Data ID Error Detection Code).
e), synchronization code, ECC (Error Correction Code)
), An EDC (Error Detection Code), user data, and the like. The data ID is 4-byte (32 channel bits) sector data of each sector. The data ID error detection code IED is a two-byte (16-bit) error detection code for data ID.

The PA (postamble) 3 area contains state information necessary for demodulation and indicates the end of the last byte of the previous data area.

The guard 2 area is an area provided in order to prevent the end deterioration at the time of repetitive recording peculiar to the phase change recording medium from reaching the data area.

The buffer area is an area provided for absorbing rotation fluctuation of the motor for rotating the optical disk 1 so that the data area does not cover the next header section 51.

The reason why the gap area is expressed as 10 + J / 16 bytes is that a random shift is performed. The random shift is to shift the data write start position in order to reduce the repetitive recording deterioration of the phase change recording medium. The length of the random shift is adjusted by the length of the buffer area located at the end of the data area, and the entire length of one sector is fixed at 2697 bytes.

FIG. 9 shows a rewritable optical disk of the constant linear velocity system (CLV) or the zone division constant linear velocity system (ZCLV), in which a secondary replacement area (shaded area) is secured in a specific place. 1 shows an example of an optical disk being used. That is, the optical disc 1 as a medium according to the embodiment of the present invention includes a user area 70 and a replacement destination area 80 in which a secondary replacement area is collectively secured.

FIG. 10 shows a rewritable optical disk of the constant linear velocity system (CLV) or the zone division type constant linear velocity system (ZCLV). In each zone different from the optical disk 1, a secondary replacement area (shaded area) is provided. This shows an example of the secured optical disk, and the description will be made below based on the configuration of the optical disk 1.

FIG. 11 shows a conventional operation of the optical disk 1. That is, when a replacement sector exists within the range to be read, a state where the data is read from the replacement area 80 in order to read the data in the replacement area 80 is shown.

FIG. 12 shows the operation of the optical disc 1 according to the embodiment of the present invention. When a replacement sector exists in the range to be read, the RAM (memory) 21 in which data in the replacement destination area 80 is read and stored.
In this case, the data is transferred from the replacement RAM 21 and the read operation is continued without interruption.

That is, according to the present invention, in a start operation when a rewritable optical disk is inserted into an optical disk device or in a start operation by a command, a memory (second RAM 2 in this embodiment) for holding secondary replacement data.
1), the function of reading the registered secondary replacement data into the memory and the function of determining that the data corresponds to the secondary replacement sector during reproduction, so that the rotation of the optical disk is not changed. In this case, the replacement data of the secondary replacement is immediately transferred.

Next, the operation of the optical disk apparatus of the present invention in such a configuration will be described with reference to the flowchart of FIG.

The CPU 25 of the optical disk apparatus uses the fact that the replacement area of the SDL is integrated in the replacement area 80 of the optical disk 1 when the start operation at the time of inserting the optical disk 1 or the start operation by the command occurs (ST1). Then, the replacement data is continuously read and stored in the RAM (memory) 21 (ST2). When the capacity of the RAM 21 is smaller than the registered SDL data amount, the reading operation is performed until the data can be stored in the RAM 21.

When a read operation is specified by a host (not shown) and the CPU 25 corresponds to a secondary replacement (SDL) sector (ST5) while reading the user area 70 of the optical disk 1 (ST3), the replacement destination area A search is made for the presence or absence of the corresponding sector in the RAM 21 storing the replacement data of 80 (ST6).
1 to transfer the replacement data of the corresponding sector (ST7);
If it does not correspond (for example, the data could not be stored in the RAM 21), seek to the replacement area 80 of the SDL and read the replacement data of the corresponding sector as usual (ST8).

When the replacement area data is transferred from the RAM 21 and there is still a designated range for reading, and when reading the user area 70, the CPU 25 determines that the operation reading the user area 70 earlier has transferred the replacement data from the RAM 21. By continuing the read operation without interruption, the read operation can be performed in real time without causing overrun (re-SEEK).

When the CPU 25 reads the replacement destination data from the replacement destination area 80 into the RAM 21 by the start operation based on the command, the completion of the command is delayed for the host (not shown) by the time required for the reading operation. Before executing the command, the end of the command is once reported to a host (not shown), and then the replacement data is read from the RAM 21 so that the execution time of the command is not affected.

If the process ends in step ST4, C
The PU 25 ends the reading of the user area 70.

As described above, according to the embodiment of the present invention, the replacement data of the secondary replacement sector can be transferred immediately without changing the rotation of the optical disk.

[0095]

As described in detail above, according to the present invention,
It is possible to provide an optical disk device that can reduce the time required to start reading even when the secondary replacement area of the optical disk is located at a specific location.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an optical disk device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a schematic configuration of an optical disc.

FIG. 3 is a diagram showing a wobble situation of a header portion and a groove portion of the optical disc.

FIG. 4 is a plan view showing a schematic configuration of an optical disc.

FIG. 5 is a plan view showing a schematic configuration of an optical disc.

FIG. 6 is a view for explaining the state of preformat data in a header portion of an optical disc, and surrounding grooves and lands.

FIG. 7 is a view for explaining the state of preformat data in a header portion of an optical disc and peripheral grooves and lands.

FIG. 8 is a diagram showing a sector format for each sector.

FIG. 9 is a diagram showing an example of an optical disc in which a replacement area for secondary replacement is gathered at a specific location.

FIG. 10 is a diagram showing an example of an optical disk in which a secondary replacement area is secured in each zone.

FIG. 11 is a diagram showing a conventional operation in an optical disc.

FIG. 12 is a diagram showing an operation in the optical disc based on the embodiment of the present invention.

FIG. 13 is a flowchart for explaining the operation of the optical disc device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical disk 2 ... Optical pick-up 3 ... Objective lens 6 ... DVD data processing unit 10 ... Spindle motor 11 ... Feed motor 13 ... RF amplifier 14 ... Servo amplifier 15 ... DVD servo seek control unit 17 ... Drivers 20, 21 RAM 26 (storage unit, storage means) 24 ROM 25 CPU (control means)

Claims (5)

[Claims] The present invention has a track of grooves and lands for recording spiral or concentric data, and has a header and data consisting of a fixed length of grooves and lands and a sync code and address data attached to a head portion. And a plurality of sectors consisting of a recording area to be recorded,
An optical disc provided with a user area composed of a plurality of zones for each of a plurality of tracks and a replacement area in which replacement data of a secondary replacement sector is pre-recorded at a specific location is rotated differently for each zone. In an optical disk device that records data on the optical disk or reproduces data recorded on the optical disk in a state where the optical disk is rotated by a number, the start operation when inserting the optical disk, or the start operation by a command, First control for continuously reading replacement destination data of a secondary replacement sector stored in a replacement destination area provided on an optical disk and storing the data in a predetermined storage unit
And second control means for performing control to search the storage unit and transfer replacement data of the corresponding sector when a secondary replacement sector is detected while reading data from the user area of the optical disk. An optical disc device, comprising: 2. The optical disk device according to claim 1, wherein said storage unit is a RAM. And a track having grooves and lands for recording spiral or concentric data. And a plurality of sectors consisting of a recording area to be recorded,
An optical disc provided with a user area composed of a plurality of zones for each of a plurality of tracks and a replacement area in which replacement data of a secondary replacement sector is pre-recorded at a specific location is rotated differently for each zone. In an optical disk device that records data on the optical disk or reproduces data recorded on the optical disk in a state where the optical disk is rotated by a number, the start operation when inserting the optical disk, or the start operation by a command, Control means for controlling to continuously read replacement data of a secondary replacement sector stored in a replacement area provided on the optical disk and to store the replacement data in a predetermined storage unit; When the storage capacity of the storage unit exceeds the storage capacity of the storage unit, the storage operation under the control of the control unit ends when the storage capacity of the storage unit is full. Optical disc device comprising an end section, that provided with the that. 4. A recording medium having a groove and a land track for recording spiral or concentric data, comprising a fixed length groove and a land, and a header part and a data comprising a synchronization code and address data given to a head portion. And a plurality of sectors consisting of a recording area to be recorded,
An optical disc provided with a user area composed of a plurality of zones for each of a plurality of tracks and a replacement area in which replacement data of a secondary replacement sector is pre-recorded at a specific location is rotated differently for each zone. In an optical disk device that records data on the optical disk or reproduces data recorded on the optical disk in a state where the optical disk is rotated by a number, the start operation when inserting the optical disk, or the start operation by a command, Control means for controlling to continuously read replacement data of a secondary replacement sector stored in a replacement area provided on the optical disk and to store the replacement data in a predetermined storage unit; When the storage capacity of the storage unit exceeds the storage capacity of the storage unit, the storage operation under the control of the control unit ends when the storage capacity of the storage unit is full. Terminating means; searching means for searching for the presence of a corresponding sector in the storage unit when a secondary replacement sector is detected while reading data in the user area of the optical disc; Transfer means for transferring replacement data of the corresponding sector from the storage unit; and reading means for reading replacement data of the corresponding sector from a replacement area provided on the optical disk when the search cannot be performed by the search means. An optical disc device, comprising: And a track having grooves and lands for recording spiral or concentric data. The header and the data are composed of grooves and lands of a fixed length, and are provided with a synchronization code and address data attached to a leading portion thereof. And a plurality of sectors consisting of a recording area to be recorded,
An optical disc provided with a user area composed of a plurality of zones for each of a plurality of tracks and a replacement area in which replacement data of a secondary replacement sector is pre-recorded at a specific location is rotated differently for each zone. In an optical disc apparatus that records data on the optical disc or reproduces data recorded on the optical disc in a state where the optical disc is rotated by a number of times, when the optical disc is started by a command from the host, the host temporarily executes the operation. And a storage unit for continuously reading and storing the replacement data of the secondary replacement sector stored in the replacement destination area provided on the optical disk after reporting the command completion by the reporting unit. An optical disc device comprising: