WO2005088638A1 - 情報記録媒体の記録再生方法および情報記録再生装置 - Google Patents
情報記録媒体の記録再生方法および情報記録再生装置 Download PDFInfo
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- WO2005088638A1 WO2005088638A1 PCT/JP2005/004081 JP2005004081W WO2005088638A1 WO 2005088638 A1 WO2005088638 A1 WO 2005088638A1 JP 2005004081 W JP2005004081 W JP 2005004081W WO 2005088638 A1 WO2005088638 A1 WO 2005088638A1
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- recording
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Classifications
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
- G11B7/00458—Verification, i.e. checking data during or after recording
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1883—Methods for assignment of alternate areas for defective areas
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
- G11B20/1883—Methods for assignment of alternate areas for defective areas
- G11B2020/1896—Methods for assignment of alternate areas for defective areas using skip or slip replacement to relocate data from a defective block to the next usable block, e.g. with a primary defect list [PDL]
Definitions
- the present invention relates to a method for recording / reproducing information on an information recording medium capable of recording / reproducing Z, and an apparatus for recording / reproducing the information by the method.
- a spiral groove track for tracking is formed on an optical disk substrate, and a recording layer of an organic material or the like is formed thereon.
- the recording layer is partially altered by condensing a high-V, high-power laser beam to generate a minute light spot and irradiating the recording layer with the light spot based on the recording data.
- recording pits are formed and data is recorded.
- the recorded optical disk medium has the same data format as the ROM medium on which the embossed data pit row is formed, and the optical disk medium can provide servo signals with almost the same characteristics as the ROM medium. There is an advantage that it can be easily reproduced even with a drive device. This is called playback compatibility.
- DVD-R format data ID such as a logical address and additional information such as error correction are added to user data, and the resulting data is recorded on the optical disc medium as a series of continuous data.
- This continuous recording format is the same as the DVD-ROM format.
- a device that records information on such an optical disk medium and reads the recorded information is called an optical disk device.
- an optical disk device When a recording operation is performed in an optical disc device, In some cases, the properties of the disk may not be good. In the worst case, the data recorded there will be unreproducible. Therefore, a recording failure area is managed by previously finding an area where a recording failure may occur or confirming a recording failure area.
- the defective recording area is called a defect (default), and the management of the defective recording area is generally called default management. The same data as the data recorded in the defective recording area is recorded in another area.
- Conventional defect management includes a slip replacement method and a linear replacement method.
- the slip replacement method is a method in which a series of data is continuously recorded while jumping over a defect
- the linear replacement method is a method in which data to be written at a default position is recorded in another area. That is, in the slip replacement system, data to be recorded in the default area is recorded in the next recording area, and the information in the default area is recorded in a separately prepared management information area. Therefore, the recording area changes based on whether or not the defect area exists.
- the management information area is referred to, and data is read out of the default area.
- a replacement area is predetermined, and data to be recorded in the defect area and information on the defect area are recorded in the management information area. Data recorded in areas other than the default area is not affected. Immediately, the recorded data becomes discontinuous. With reference to the management information area, the data in the replacement area and the data in the area other than the default area are connected to be reproduced.
- JP-A-2002-184116 discloses a defect management method.
- this conventional defect management method when a defect is detected on an optical disk, a predetermined area is set as a defect area behind the defect position and the position of the defect, and auxiliary data is added before the data immediately after the default. Has been added.
- This method can be applied to both the slip replacement method and the linear replacement method, and information on the default area is secured.
- Japanese Patent Application Laid-Open No. 2002-117627 discloses a data recording method. This In the conventional data recording method, data is recorded on the optical disk in block units using a write clock generated based on information obtained from the optical disk. If a normal write clock is not generated correctly when writing data to the block area A, the data writing is stopped and the replacement processing is performed on the block area A. Thereafter, data is written to the block area A using a reference clock based on a frequency signal from a crystal oscillator different from a normal write clock.
- Japanese Patent Laid-Open Publication No. 2000-090585 discloses a replacement processing method.
- the conventional replacement processing method is executed on an information recording medium in which sector fields having address information are continuously arranged. If the address information cannot be normally reproduced, the sector field is regarded as a defective sector field. When three or more defective sector fields are consecutive, the consecutive defective sector fields are subjected to the replacement process.
- An object of the present invention is to provide a recording / reproducing method and an information recording / reproducing apparatus for an information recording medium capable of improving the recording reliability while maintaining reproduction compatibility with a read-only medium. .
- Another object of the present invention is to provide a recording / reproducing method and an information recording / reproducing apparatus for an information recording medium in which recorded data is continuously recorded and reproduced.
- Another object of the present invention is to provide a recording / reproducing method and an information recording / reproducing apparatus for an information recording medium in which a recording Z reproduction rate is improved.
- Still another object of the present invention is to provide a recording / reproducing method and an information recording / reproducing apparatus for an information recording medium in which a decrease in the recording capacity of the information recording medium is suppressed while performing the decent management.
- Another object of the present invention is to provide a recording and reproducing method and an information recording and reproducing apparatus for an information recording medium in which simple data management is performed.
- an information recording apparatus includes a recording unit that accesses a recording medium and records recording data in recording block units, and a recording unit that controls the recording unit based on the recording data.
- a control unit ; and a detection unit that detects a recording abnormality based on a reproduction signal from the recording unit and outputs an abnormality detection signal.
- the recording control unit is configured to detect the abnormality.
- at least one recording block including the recording block of the recording data recorded when the abnormality detection signal is detected in a recording area is replaced with a recording area next to the recording area. Continue to re-record.
- the recording control unit in response to the abnormality detection signal, re-records the recording block of the recording data that was recorded when the abnormality detection signal was detected, in a next recording area. Is also good.
- the recording control unit in response to the abnormality detection signal, causes the recording block of the recording data recorded when the abnormality detection signal is detected and a recording block immediately before the recording block to be next. Recording area force Re-recording may be performed continuously.
- the abnormality detection signal is preferably a running OPC (Optimum Power Control) signal or a servo error signal.
- the servo error signal is a tracking servo error signal or a focus servo error signal.
- the recording block is preferably an ECC (Error Correction Code) block.
- the recording medium may be an optical disk medium.
- an information reproducing apparatus includes: a reproducing unit that continuously reproduces recording data recorded on a recording medium in recording block units; and the recording block includes a recording unit that specifies the recording block.
- a playback control unit for controlling the playback unit, and a predetermined number of recording blocks played back by the playback unit, wherein the identifier of the recording block currently played back by the playback unit is held.
- a determination unit that determines whether or not the deviation force of the identifier of the recording block is the same as the deviation force, and outputs the currently reproduced recording block when it is determined that they are not the same.
- the determination unit holds the predetermined number of latest recording blocks including the currently reproduced recording block.
- the determining unit when it is determined that the identifier of the currently reproduced recording block is the same as one of the identifiers of the held recording block, the determination of the recording block having the same identifier, One of the recording blocks is output. In this case, the determining unit stores the identifier of the currently reproduced recording block. If it is determined that the recording block is identical to any of the recording block identifiers, the recording block having a low PI error value may be output, or the recording block to be captured later may be output; The recording block may be output instead of an uncorrectable recording block, and the recording block is preferably an ECC (Error Correction Code) block. Good.
- ECC Error Correction Code
- an information recording method includes accessing a recording medium based on recording data, recording the recording data in recording block units, and indicating the recording state. Outputting an abnormal detection signal based on the recording state signal and outputting an abnormality detection signal; and responding to the abnormality detection signal when the abnormality detection signal is detected. It is achieved by re-recording at least one recording block including the recording block of the recording data recorded in a certain recording area continuously in a recording area next to the recording area.
- the re-recording is achieved by re-recording, in response to the abnormality detection signal, the recording block of the recording data recorded when the abnormality detection signal was detected, to a next recording area.
- the recording block of the recording data recorded when the abnormality detection signal is detected, and the immediately preceding recording block may be used as the next recording area force. And may be achieved by re-recording.
- the recording state signal may be a running OPC (Optimum Power Control) signal or a servo error signal.
- the servo error signal may be a tracking servo error signal or a focus servo error signal.
- the recording block is preferably an ECC (Error Correction Code) block
- the recording medium is preferably an optical disk medium.
- an information reproducing method includes continuously reproducing recorded data recorded on a recording medium in recording block units, wherein the recording block includes the recording block.
- a predetermined number of recorded recording blocks that have been reproduced, and the identifier of the recording block that is currently reproduced by the reproduction unit is stored.
- the information reproducing method achieved by determining whether or not the same power is equal to any of the identifiers of the recording blocks and outputting the currently reproduced recording block when it is determined that they are not the same is as follows.
- the method may further comprise maintaining the predetermined number of latest recording blocks including the currently reproduced recording block for the recording block to be reproduced.
- the information reproducing method may include, when it is determined that the identifier of the currently reproduced recording block is the same as any of the identifiers of the held recording blocks, determine which of the recording blocks having the same identifier.
- One of the recording blocks may be output, the recording block having a low PI error value may be output, or the recording block to be reproduced later may be output, or an uncorrectable recording block may be output.
- a recording block may be output instead of a recording block.
- the recording block is an ECC (Error Correction Code) block
- the recording medium is an optical disk medium.
- an optical disc medium includes a lead-in area, a data recording area, and a lead-out area.
- a plurality of recording blocks are sequentially arranged in the data recording area, and recording data is recorded in the data recording area in units of the recording blocks.
- a predetermined number of the recording blocks having the same content are continuously recorded.
- the recording block is an ECC (Error Correction Code) block.
- FIG. 1 is a cross-sectional view showing a configuration of an optical disk medium used in the present invention.
- FIG. 2 is a diagram showing a format of the optical disc medium of FIG. 1.
- FIG. 3 is a diagram showing a detailed format of a data storage area of the optical disc medium of FIG. 2.
- FIG. 4 is a block diagram showing a configuration of an optical disc recording device according to a first embodiment of the present invention.
- FIG. 5 is a flowchart showing an operation of the optical disc recording device according to the first embodiment of the present invention.
- FIG. 6A is a diagram showing a defect management according to the first embodiment.
- FIG. 6B is a diagram showing the defect management according to the first embodiment.
- FIG. 6C is a diagram showing a defect management according to the first embodiment.
- FIG. 7 is a block diagram showing a configuration of an optical disc reproducing device according to a first embodiment of the present invention.
- FIG. 8 is a flowchart showing an operation of the optical disc reproducing device according to the first embodiment of the present invention.
- FIG. 9 is a flowchart showing an operation of the optical disc reproducing device according to the first embodiment of the present invention.
- FIG. 10 is a diagram showing data reproduced in order and data held in order.
- FIG. 11A is a diagram showing a disturbance.
- FIG. 11B is a diagram showing a tracking error.
- FIG. 11C is a diagram showing a recording abnormal (defective) signal.
- FIG. 12 shows measurement results of PI errors of the present invention and a conventional example.
- FIG. 13 is a flowchart showing an operation of the optical disc recording apparatus according to the second embodiment of the present invention.
- FIG. 14A is a diagram showing a recording abnormal (defective) signal.
- FIG. 14B is a diagram showing a re-recording operation in the optical disc recording device according to the second embodiment of the present invention.
- FIG. 14C is a diagram showing a re-recording operation in the optical disc recording device according to the second embodiment of the present invention.
- FIG. 15 is a flowchart showing an operation of the optical disc reproducing device according to the second embodiment of the present invention.
- FIG. 16 is a flowchart showing an operation of the optical disc reproducing device according to the second embodiment of the present invention.
- FIG. 17 is a diagram showing data read from an optical disc medium and data held by a data discriminator.
- an optical disc medium that is an information recording medium used for recording and reproduction will be described.
- a dielectric film 12, a phase change recording film 13, a dielectric film 14, and a reflective film 15 are laminated on a substrate 11.
- the substrate 11 is a disc-shaped transparent substrate made of, for example, polycarbonate and having a thickness of 0.6 mm and a diameter of 12 centimeters.
- Recording film 13 is composed mainly of AgInSbTe
- dielectric film 14 is composed of ZnS-SiO
- reflective film 15 is composed mainly of AlTi.
- a guide groove (not shown) called a pre-group is formed on the substrate 11, and a laser beam spot from an optical head of an information recording / reproducing apparatus, that is, an optical disk recording / reproducing apparatus is used during recording and reproduction. Are scanned along this guide groove.
- the dielectric films 12 and 14 are provided so as to protect the phase change recording film 13 and control the interference condition of the laser beam spot so that the optical head can obtain a larger signal.
- the phase state of the phase change recording film 13 is a crystalline state in an initial state. When the recording laser beam spot is irradiated, the state changes to an amorphous state, whereby information is recorded on the phase-change recording film 13.
- a protective film made of a resin such as an ultraviolet curable resin may be provided on the reflective film 15.
- the optical disk medium has a land group format with a bit pitch of 0.13 m and a track pitch of 0.34 ⁇ m.
- the land group format is a format in which data is recorded in both hills (lands) and grooves (groups) as viewed from the incident light side.
- in-groove format which is a format in which data is recorded only in the group.
- the optical disc medium 60 includes a lead-in area 61, a data recording area 62, and a lead-out area (not shown) concentrically from the inside.
- the lead-in area 61 information on a disc (or information on a session to which the lead-in area belongs) and information on a track recorded by a user are recorded.
- an area for recording information for controlling the disc and an area for performing a recording condition test are also secured.
- the readout area is an area indicating the end of the disc (or the end of the session). Read-a When the bit area is detected, the end of the optical disk medium (or the end of the session) is recognized by the optical disk recording / reproducing apparatus.
- the data recording area 62 is outside the lead-in area 61 and records user data. In the data recording area 62, a spiral recording track 64 is formed.
- ECC Error Correcting Code
- FIG. 4 is a block diagram showing a configuration of an optical disk recording device as an optical disk device of the present invention.
- the optical disk recording device includes a spindle unit 22, an optical head unit 23, an RF circuit unit 25, a demodulator 26, an abnormality detector 27, a system controller 28, a modulator 31, an LD drive unit 33, and a servo controller 35.
- the optical disk recording apparatus of the first embodiment re-records the data when a recording failure is detected.
- the spindle unit 22 drives the optical disc medium 21 to rotate.
- the optical head unit 23 irradiates the optical disk medium 21 with a laser beam spot, detects reflected light from the optical disk medium 21, and converts the reflected light into an electric signal.
- the RF circuit unit 25 performs processes such as amplification, filtering, binarization, generation of focus and tracking servo error signals of the electric signal supplied from the optical head unit 23, and the like.
- the demodulator 26 performs demodulation processing on the signal on which the processing such as filtering has been performed by the RF circuit unit 25.
- the abnormality detector 27 detects a recording failure using a signal output from the RF circuit 25.
- the system controller 28 controls the entire apparatus.
- the modulator 31 modulates a signal corresponding to recording data under the control of the system controller 28 to generate a modulation signal.
- the LD drive unit 33 drives the laser diode (LD) of the optical head unit 23 based on the modulation signal under the control of the system controller 28.
- Servo controller 3 5 controls the servo of the optical head unit 23 according to the instruction of the system controller 28.
- the abnormality detector 27 detects a recording failure based on a running OPC (Optimum Power Control) signal or a disturbance of a track error signal during data recording.
- Running OPC is a method of calibrating recording power during recording. The reflected light from the optical disk medium 21 is monitored during data recording, and running OPC is performed. Even if continuous recording is performed for a long time by running OPC, fluctuations in recording power can be suppressed, and recording reliability can be improved.
- servo control is performed on the optical head unit 23 by the servo controller 35 so that the recording surface of the optical disk medium 21 is accurately scanned by the laser beam spot.
- force servo control for controlling the distance between the optical disk medium 21 and the optical head unit 43 and tracking servo control for controlling the laser beam spot to scan along the recording track are performed. In some cases, tilt control or the like is performed in addition to these controls.
- tilt control or the like is performed in addition to these controls.
- the tracking error signal is used as a signal indicating that there is a recording failure, it is possible to detect a defect other than a medium factor.
- the optical disc recording device shown in FIG. 4 performs a recording operation as shown in FIG.
- the optical disk recording device records data in ECC block units.
- An identifier ID indicating the order of the recording is assigned to the recording data.
- the system controller 28 takes in the recording data ID and the recording data (step S41).
- the system controller 28 controls the modulator 31 and the LD driving unit 33.
- the modulator 31 generates a modulation signal based on the ID of the recording data from the system controller 28, the recording data, and the error correction code, and outputs the modulation signal to the LD driving unit 33.
- LD drive unit 33 The laser diode (LD) of the optical head unit 23 is driven based on.
- the ID of the recording data and the recording data are recorded in the recording block i of the optical disk medium 21.
- the ID is recorded in the ID area 67 of the recording block i
- the recording data is recorded in the data area 68
- these error correction codes are recorded in the ECC area 69 (step S43).
- the reflected light of the laser beam spot irradiated from the laser diode (LD) onto the optical disc medium 21 is detected by the optical head unit 23, and the signal processing is performed by the RF circuit 25. After being performed, it is output to the abnormal signal detector 27 as a processing signal.
- the abnormal signal detector 27 monitors whether or not the recording has been normally performed based on the signal of the running OPC (step S45).
- Step S45 When the abnormal signal detector 27 detects a recording failure (YES), the system controller 28 sends the same data (ID and recording data, ECC) as the data recorded in the recording block i.
- the modulator 31 and the LD drive unit 33 are controlled so that the data is also recorded in the recording block i + 1 (step S47). Therefore, the same ID and recording data are continuously recorded in recording blocks i and i + 1. If a recording failure (abnormality) is also detected in recording block 1 + 1, the same ID and recording data may be consecutively recorded in recording blocks i, i + 1, and 1 + 2. The same is true even if the number of defective recording blocks increases.
- step S45-NO the next data is written, so that the data is recorded in the recording block in the order of ID.
- FIGS. 6A to 6C are diagrams showing the default management according to the first embodiment.
- recording data is recorded in the ECC block (ID: 1 to ID: 2) in the order of ID number.
- ID: 3 When data is recorded in the ECC block with ID: 3 and a recording failure is detected as shown in Fig. 6A, it should be recorded in the ECC block with ID: 3 as shown in Fig. 6B.
- Data is also recorded in the next ECC block. Therefore, ECC blocks with the same ID are continuously present. The recorded data is continuous.
- the conventional recording method shown in FIG. 6C if an error is detected when data is recorded in the ECC block with ID: 3, the data corresponding to ID: 3 is stored in another replacement area.
- FIG. 7 is a block diagram showing a configuration of the optical disk reproducing device.
- the optical disk reproducing device includes a spindle unit 42, an optical head unit 43, an RF circuit unit 45, a demodulator 46, a data selector 47, a system controller 48, a modulator 51, an LD driving unit 53, and a servo controller 55.
- the spindle unit 42 drives the optical disc medium 41 to rotate.
- the optical head unit 43 irradiates the optical disk medium 41 with light, detects reflected light from the optical disk medium 21, and converts the reflected light into an electric signal.
- the RF circuit unit 45 performs processes such as amplification, filtering, binarization, generation of focus and tracking servo error signals, and the like of the electric signal supplied from the optical head unit 43.
- the demodulator 46 performs demodulation processing on the signal that has been subjected to processing such as filtering in the RF circuit section 45.
- the data selector 47 determines the duplication of the reproduced ID and selects data to be used for reproduction.
- the system controller 48 controls the entire apparatus.
- the modulator 51 modulates a signal corresponding to the recording data under the control of the system controller 28 to generate a modulated signal.
- the LD drive unit 53 drives the laser diode (LD) of the optical head unit 23 based on the modulation signal under the control of the system controller 28.
- the servo controller 55 performs servo control of the optical head section 23 according to the instructions from the system controller 28.
- the spindle section 42, the optical head section 43, the RF circuit section 45, the demodulator 46, the system controller 48, the modulator 51, the LD drive section 53, and the servo controller 55 are the same as those in the optical disk recording apparatus.
- the data selector 47 includes a buffer that can store at least one ECC block of data (ID, read data) and a PI error of the ECC block!
- ID the ID of the data to be reproduced from the ECC block
- PI error of the ECC block in the buffer is compared with the PI error of the current ECC block.
- PI errors are the number of errors detected by the inner code parity of the ECC block.
- the ECC block data is transferred to the system controller 48 as output data.
- Such a reproducing method is a very simple process that needs to be built in a read-only optical disc device such as a ROM player in advance. Since only the expression needs to be supported, the cost of the read-only optical disk device does not increase significantly.
- the data for the subsequent ID may be validated and the data for the previous ID may be discarded.
- the optical disc reproducing device shown in FIG. 7 performs a reproducing operation as shown in FIG.
- the optical disk reproducing device fetches reproduced data from the optical disk medium 21 for each ECC block.
- the playback data includes an ID as an identifier for identifying the order of recording.
- the data selector 47 takes in data (ID, recording data) for one ECC block from the optical disk medium 21 via the optical head unit 43, the RF circuit 45, and the demodulation unit 46. Also, a PI error is captured (step S51).
- the ID of the previously captured data stored in the buffer of the data selector 47 is compared with the ID of the currently captured data (step S53). If the ID of the currently acquired data is not the same as the ID of the previously acquired data (step S55—NO), the acquired data is stored in the buffer. On the other hand, if the ID of the data acquired this time is the same as the ID of the data acquired last time (step S55—YES), the data of the lower V of the PI error and the data acquired are selected as positive U and data. Since the PI error is low, more reliable data can be secured (step S57). This is nothing less than regenerating while avoiding the defect part. The selected data is written to the buffer (step S59). In other words, more reliable data is always stored in the buffer.
- the data selector 47 takes in the ID from the notifier (step S61).
- the ID is compared with the ID of the previously output data (step S63). If the result of the comparison is the same ID (step S65-YES), the processing ends without outputting to avoid double output. If the comparison results in a different ID (step S65—NO), the data sorter 47 retrieves the data from the buffer and Output to 48. Since more reliable data is stored in the buffer of the data selector 47, more reliable data is output to the system controller 48.
- FIG. 10 shows the whole of these reproduction operations in time.
- FIG. 10 (a) shows data read from the optical disk medium 21, and IDs are assigned in order from ID: 0 to ID: 6. On the way, the data of ID: 2 is re-recorded to avoid a defect. The ID of the re-recorded data is expressed as force ID: 2 'which is the same as ID: 2.
- FIG. 10 (b) shows the data stored in the buffer of the data selector 47.
- data read from the optical disk medium 21 is written to the buffer at regular time intervals.
- the data of ID: 1 shown in FIG. 10A is written to the buffer at the timing shown in FIG.
- the data of ID: 0 stored in the buffer shown in FIG. 10B is output to the system controller 48 before the data of ID: 1 is written. Normally, this operation is repeated.
- the defect management is performed without specially registering the position of the default. According to this defect management, it is necessary for the optical disc reproducing apparatus to incorporate the above-described defect management reproducing function.
- this function is a very simple process and is easy to install. Also, since the optical head only needs to support the DPD method, the cost of the information reproducing apparatus does not increase.
- the PI error was compared between the case where the defect management was performed, the case where the defect management was performed, and the case where the disturbance was performed.
- an optical disc recorded by the optical disc recording apparatus having the configuration shown in FIG. 4 is reproduced using the optical disc reproducing apparatus shown in FIG.
- a disturbance in which the external force of the device is periodically reduced causes a tracking error of about 0.02 / zm as shown in FIG. 11B.
- the disturbance was calorie in three ECC block cycles.
- a signal for tracking error was used as a signal for abnormality detection. As shown in FIG.
- the abnormality detector 27 when a tracking error corresponding to an off-track of 0.02 m occurs, the abnormality detector 27 generates a pulse and notifies the system controller 28 of a recording failure.
- the optical head 23 has an LD wavelength of 405 nm and an NA (numerical aperture) of 0.65.
- FIG. 12 shows measurement results of PI errors of the present invention and the conventional example.
- the PI error increases at the position of the ID to which the disturbance has been added, but in the present invention, it can be seen that the PI error does not increase even at the ID position to which the disturbance has been added. That is, it was confirmed that the reliability of the optical disk device was significantly improved by the present invention.
- the force that handles the case where the defetat fits in one ECC block In some cases. In such a case, it is more reliable to record the data strength of the ID several times before the ID of the ECC block that detected the abnormality again.
- the optical disk recording device according to the second embodiment has the same configuration as the information recording device according to the first embodiment.
- the system controller 28 has a larger buffer than in the first embodiment, and can store data for at least several ECC blocks, in this example, at least two blocks.
- the optical disc recording apparatus performs a recording operation as shown in FIG.
- the optical disk recording device performs recording for each ECC block, which is a recording unit of recording data.
- An ID is assigned to the recording data as an identifier for identifying the recording order.
- the system controller 28 takes in the ID of the data to be recorded and the recording data (step S71).
- This data is the j-th data, and the ID is j.
- the system controller 28 controls the modulator 31 and the LD drive unit 33.
- the modulator 31 generates a modulation signal based on the ID of the recording data from the system controller 28, the recording data, and the error correction code, and outputs the modulation signal to the LD driving unit 33.
- the LD driving unit 33 drives the laser diode (LD) of the optical head unit 23 based on the modulation signal.
- the data of the ID power ⁇ is recorded in the recording block i.
- the ID (j) is written in the ID area 67 of the recording block i
- the recording data is written in the data area 68
- these error correction codes are written in the ECC area 69 (step S73).
- the reflected light of the laser beam spot applied to the optical disc medium 21 is also detected by the optical head unit 23, and the signal processing is performed by the RF circuit 25. After being performed, it is output to the abnormal signal detector 27 as a processing signal.
- the abnormal signal detector 27 monitors whether or not the recording is normally performed V based on the signal of the running OPC (step S75).
- step S75-YES When the abnormal signal detector 27 detects a recording failure (step S75-YES), the system controller 28 performs the next recording until the data recorded n times before the data recorded in the recording block i. Record continuously from block i + 1. That is, the same, the recording block of the recording data is repeatedly recorded corresponding to i + 1 to i + 1 to i + n (step S77).
- step S75-NO In the case of good recording (step S75-NO), the recording data is recorded continuously in the recording block in the order of ID to write the next data.
- the system controller Since it is necessary to save the data recorded n times before, the system controller needs at least n stages of buffers for storing the data.
- the signal when a signal for detecting a recording failure appears, the signal is recorded when the signal appears, and the previous recording of the ECC block is re-recorded.
- the force that is the re-recording from the previous time and the previous data force may be re-recorded. This is used when the defect management is to be performed more reliably, because the vicinity where the recording failure is detected may be damaged in a relatively wide area.
- the data selector 47 includes a buffer capable of storing data (ID, read data) of at least n stages of ECC blocks and PI errors of the ECC blocks.
- ID data
- PI error is the number of errors detected by the inner code parity of the ECC block.
- the optical disk reproducing device performs a reproducing operation as shown in FIG.
- the information reproducing device fetches reproduced data from the optical disk medium 41 for each ECC block.
- the reproduction data includes an ID as an identifier for identifying the order of recording.
- the data selector 47 takes in data (ID, recording data) for one ECC block recorded from the optical disk medium 41 via the optical head unit 43, the RF circuit 45, and the demodulation unit 46. Also, a PI error is captured (step S81).
- step S83 The ID of the data captured up to n times before and stored in the buffer of the data selector 47 is compared with the ID of the data captured this time (step S83). If the ID of the data captured this time is not the same as the ID of the data captured up to the previous time (step S85—N0), the data captured this time is stored in the buffer. On the other hand, if the ID of the data acquired this time is the same as the ID of the data acquired up to the last turn (step S85—YES), the data acquired with the lower PI error is selected as the correct data. Since the PI error is low, more reliable data can be secured (step S87).
- the selected data is written to the buffer. In other words, more reliable data is always stored in the buffer (step S89).
- the data sorter 47 takes in the ID from the notifier (step S91). A comparison is made as to whether or not the same ID as that of the data output up to n times before exists (step S93). If the comparison results in the same ID (step S95-YES), the process ends without outputting to avoid double output. If the comparison results in different IDs (step S95-NO), the data selector 47 extracts the data from the buffer and outputs it to the system controller 48. Since more reliable data is stored in the buffer of the data selector 47, more reliable data is output to the system controller 48.
- FIG. 17 shows the whole of these reproduction operations in time.
- Figure 17 (a) shows the optical data This indicates data read from the disk medium 41, and IDs from ID: 1 to ID: 7 are sequentially attached as IDs. On the way, the data of ID: 2, ID: 3, and ID: 5 are re-recorded to avoid defects. The IDs of the re-recorded data are the same as ID: 2, ID: 3, and ID: 5, but are expressed as ID: 2, ID: 3, and ID: 5 '.
- FIG. 17B shows data stored in the first buffer of the data selector 47.
- FIG. 17 (c) shows the data stored in the buffer of the second stage of the data selector 47.
- data read from the optical disk medium 41 is written to the buffer at regular time intervals. For example, data of ID: 1 shown in FIG. 17A is written to ID: 1 of the first-stage buffer shown in FIG. 17B. At this time, the data of ID: 0 stored in the first-stage buffer shown in FIG. 17B is moved to the second-stage buffer shown in FIG. 17C. The data in the second-stage buffer shown in FIG. 17C is output to the system controller 48 before the first-stage data is written. Normally, this operation is repeated.
- the data of ID: 4 and ID: 5 shown in FIG. 17A is taken into the data selector 47 and processed.
- the data of the next ID: 5 ′ is taken into the data selector 47
- the data of the ID: 5 is stored in the first-stage buffer shown in FIG. 17B. Since the IDs are the same, data is sorted.
- the data captured by the data selector 47 shown in FIG. 17A is selected, and the first-stage buffer shown in FIG. : 5 'data is stored.
- the ID captured by the data selector 47 shown in FIG. 17 (a) Data is not sorted because ID is different from 5 'data. In this way, the data in the first and second stage buffers is replaced with data with a lower PI error.
- ID: 0, ID: 1, ID: 2, and ID: 3 ′ is output to the system controller 48 from the second buffer shown in FIG. After that, since the data of ID: 2 'and ID: 3' have already been output, they are not output, and the following data of ID: 4 and ID: 5 'are output. In this way, continuous ID data is output to the system controller 48.
- the ECC block having a low PI error is treated as regular data. Can be adopted as normal data and if there is an uncorrectable error, the ECC block with the same ID detected later is treated as normal data.
- the same data is recorded again when a recording failure is detected. Therefore, when the same ID is detected, it is needless to say that there is a high possibility that a block that appears later has few errors. Therefore, when the same ID is detected, a method of reproducing the later detected block as recorded data may be adopted.
- the running OPC signal and the tracking error signal are signals indicating a recording failure, other signals correlated with the recording failure may be used.
- the force exemplifying the error when the wavelength is 405 nm and the NA (numerical aperture) is 0.65 is applicable to any wavelength and NA that are not limited to the above-mentioned wavelength and NA.
- the optical disk device has been described as the information recording Z reproducing device, but the present invention can be applied to a magnetic recording device and the like.
- a block having the same ID is illustrated twice when a block having the same ID is recorded. It is also possible to record a block having the same ID two or more times, and select an appropriate block with a medium force.
- An apparatus, a reproducing method, and an information reproducing apparatus can be provided. Further, according to the present invention, it is possible to provide an information recording medium recording method and an information recording apparatus, an information recording medium reproducing method and an information reproducing apparatus in which recording data is continuously recorded and reproduced.
- an information recording apparatus there is no need to record the information of the dephato in a predetermined recording area at the time of recording, or to check the information of the deafat beforehand at the time of reproduction.
- an information recording apparatus a method of reproducing an information recording medium, and an information reproducing apparatus.
- the recording area consumed every time the default information is updated can be reduced, and a decrease in the recording capacity of the information recording medium is suppressed.
- a recording method and an information recording apparatus for an information recording medium a method for reproducing an information recording medium, and an information reproducing apparatus.
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0927174A (ja) * | 1995-07-07 | 1997-01-28 | Canon Inc | データ記録方法及びデータ記録再生方法 |
JPH09139029A (ja) * | 1995-11-15 | 1997-05-27 | Sony Corp | データ記録再生装置 |
JPH10149633A (ja) * | 1996-11-15 | 1998-06-02 | Toshiba Corp | デジタルデータの記録システム |
JP2000076802A (ja) * | 1998-09-01 | 2000-03-14 | Hitachi Ltd | 情報記録・再生方法 |
JP2003510742A (ja) * | 1999-09-23 | 2003-03-18 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | ディスク状記録媒体にファイルを即時書き込み又は読出しする方法 |
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0927174A (ja) * | 1995-07-07 | 1997-01-28 | Canon Inc | データ記録方法及びデータ記録再生方法 |
JPH09139029A (ja) * | 1995-11-15 | 1997-05-27 | Sony Corp | データ記録再生装置 |
JPH10149633A (ja) * | 1996-11-15 | 1998-06-02 | Toshiba Corp | デジタルデータの記録システム |
JP2000076802A (ja) * | 1998-09-01 | 2000-03-14 | Hitachi Ltd | 情報記録・再生方法 |
JP2003510742A (ja) * | 1999-09-23 | 2003-03-18 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | ディスク状記録媒体にファイルを即時書き込み又は読出しする方法 |
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