JP2013093073A - Information recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that data recorded in an adjacent area is overwritten due to track deviation during recording and the reproduction of the data in the adjacent area is disabled.SOLUTION: An information recorder includes a storage circuit 11 and a recording circuit 12. In the information recorder, before data is recorded in a disk 14 by the recording circuit 12, data which has been recorded in the adjacent area is stored in advance in the storage circuit 11. Thus, even in the case that the occurrence of track deviation destroys the recorded data in the adjacent area, recovery is possible because the data in the adjacent area is stored in the storage circuit 11.

Description

  The present invention relates to an information recording apparatus for recording information on a recording medium in which recording areas are arranged spirally or concentrically.

  When recording is performed on a recording medium such as an optical disk, there is a problem that if the track is off, the data recorded on the adjacent track is overwritten and destroyed. On the other hand, there has been proposed a method for detecting an out-of-track by checking a continuity of a tracking error signal and a reproduced address.

  In the method of detecting an out-of-track using address continuity confirmation, it is possible to reliably detect an out-of-track, but a detection delay occurs because confirmation can be performed only at intervals at which addresses are recorded. That is, there is a case where data recorded on the adjacent track is destroyed by overwriting when the off-track is detected. On the other hand, in the method of detecting the off-track from the tracking error signal, there is a possibility that the off-track is missed (not detected) or erroneously detected. In order to cope with this, a device has been devised to reduce undetected and erroneous detection (for example, see Patent Document 1).

JP 2009-295211 A

  However, the amplitude of the tracking error signal fluctuates due to various factors such as fluctuations in the reflectivity of the disk and scratches on the disk surface. It is difficult to deal with all of these fluctuations, neither undetected nor erroneously detected, and further eliminate the detection delay.

  In addition, tracking error detection by tracking error signals may be combined with tracking error detection by confirming the continuity of addresses to be reproduced, but there remains a problem that data recorded on adjacent tracks is overwritten and destroyed. . If the amount of data to be destroyed is small, it can be restored by correction using an error correction code. However, since addresses are recorded only at regular intervals, it is difficult to restore in all cases.

  In order to solve the above-described conventional problems, an information recording apparatus of the present invention includes a storage circuit, a recording circuit, and an off-track detection circuit, and previously stores data in an area adjacent to an area where data is recorded. Data is recorded in the state held in

  According to this configuration, even if a track deviation occurs during recording and the recorded data in the adjacent area is overwritten and destroyed, the recorded data in the adjacent area can be recovered using the data held in the storage circuit.

  According to the information recording apparatus of the present invention, it is possible to provide an information recording apparatus that can be restored even if the recording data in the adjacent area is destroyed due to the off-track.

1 is a block diagram of an optical disc apparatus according to Embodiment 1 of the present invention. The figure which shows the recording data which the memory circuit 11 in Embodiment 1 of this invention hold | maintains Area layout diagram of disk 14 in Embodiment 1 of the present invention The figure which shows the locus | trajectory of the light beam at the time of off-track in Embodiment 1 of this invention The figure which shows the locus | trajectory of the light beam at the time of off-track in Embodiment 1 of this invention The figure which shows the locus | trajectory of the light beam at the time of off-track in Embodiment 1 of this invention The figure which shows the recording data which the memory circuit 11 in Embodiment 1 of this invention hold | maintains The figure which shows the recording data which the memory circuit 11 in Embodiment 1 of this invention hold | maintains 1 is a block diagram of an optical disc apparatus according to Embodiment 1 of the present invention. The figure which shows the recording data which the boundary data storage circuit 20 in Embodiment 1 of this invention hold | maintains Block diagram of the optical disc apparatus in Embodiment 2 of the present invention Explanatory drawing of off-track detection in Embodiment 2 of the present invention The figure which shows the recording data which the memory circuit 11 in Embodiment 2 of this invention hold | maintains The figure which shows the recording data which the memory circuit 11 in Embodiment 2 of this invention hold | maintains The figure which shows the recording data which the memory circuit 11 in Embodiment 2 of this invention hold | maintains Explanatory drawing of off-track detection in Embodiment 2 of the present invention Detailed block diagram of recording circuit 12 in the first and second embodiments of the present invention The figure which shows the data which the memory circuit 11 in Embodiment 1 and 2 of this invention hold | maintains

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

(Embodiment 1)
FIG. 1 is a block diagram showing a configuration of an optical disc apparatus according to Embodiment 1 of the present invention, in which 11 is a storage circuit, 12 is a recording circuit, 13 is an optical pickup, 14 is a disc, 15 is a reproduction circuit, and 16 is a track. This is a disconnection detection circuit. FIG. 2 is a diagram showing recording data held by the storage circuit 11, data with diagonal lines indicates recording data recorded on the disk 14, and data without diagonal lines indicates recording data not recorded on the disk 14. . FIG. 3 is an area layout diagram of the disk 14, and 100 to 123 are areas. One block of recording data is recorded in each area. Here, the block is a minimum unit for recording or reproducing the recording data on the disk 14. For example, in DVD and BD, which are optical disks that are frequently used in recent years, recording data 32 kB is one block in DVD, and recording data 64 kB is one block in BD.

  The storage circuit 11 holds recording data sent from an external device. The recording data input from the reproduction circuit 15 is held. Further, in response to a recording instruction from a controller (not shown), the stored recording data is output to the recording circuit 12. The recording circuit 12 performs conversion processing such as error correction coding and modulation on the recording data input from the storage circuit 11 to generate binary data, and outputs the binary data to the optical pickup 13. The optical pickup 13 irradiates a designated area of the optical disc 14 with a light beam according to binary data input from the recording circuit 12 in accordance with a recording instruction from the controller, thereby generating a mark and a space. Further, in response to a reproduction instruction from the controller, a light beam is irradiated onto a designated area of the optical disk 14, and a reproduction signal obtained by converting the intensity of the reflected light into an electric signal is output to the reproduction circuit 15. A tracking error signal indicating how much the light beam is deviated from the currently scanned track is generated and output to the off-track detection circuit 16. The reproduction circuit 15 performs binarization, demodulation, error correction processing, and the like on the reproduction signal input from the optical pickup 13, restores the recorded data, and outputs it to the storage circuit 11. The off-track detection circuit 16 detects the off-track from the tracking error signal input from the optical pickup 13. For example, when the absolute value of the tracking error signal is larger than a predetermined value, it is detected that the track is off. At this time, the direction in which the off-track has occurred can also be detected based on the polarity of the tracking error signal.

  First, the recording operation when recording data to be recorded from the area 103 of the disk 14 to the area 108 is sent from the external device will be described in detail.

  First, recording data (UD_103) to be recorded in the area 103 is received from an external device and held in the storage circuit 11. The recording data held in the storage circuit 11 at this time is as shown in FIG. An area that has a high possibility of destroying recorded data in the case where an off-track occurs during binary data recording in the area 103 is adjacent from the area 100 adjacent to the inner end of the area 103 to the inner end of the area 103. From the region 105 adjacent to the outside of the start end of the region 103 to the region 106 adjacent to the outside of the end of the region 103. If tracking control cannot be performed after the occurrence of the off-track, the light beam moves across a plurality of tracks. Since the recording data recorded on the disk 14 is subjected to error correction coding as a protection against defects such as scratches, if the amount of data is such that it can be destroyed by traversing the light beam, the error correction code is used. Can be restored. However, in the state where tracking control is continued for another track after the occurrence of the track deviation (track jump), a lot of data on the track is destroyed and cannot be restored by the error correction code. Adjacent tracks are most likely to be corrupted by track jumps.

  The controller reproduces at least one turn inside the recording start portion and holds the recording data. When the area 103 serves as a recording start portion, the reproducing circuit 15 reproduces the area from the area 100 adjacent to the inner end of the area 103 to the area 102 immediately before the area 103. The recording data UD_102 is stored in the storage circuit 11 from the obtained recording data UD_100.

  In parallel with the reproducing operation, if there is an unused area in the storage circuit 11, recording data reception from an external device may be continued.

  The controller starts recording if recording data for at least one round following the recording area is held in the storage circuit 11. When the area 103 serves as a recording start portion, if the recording data from the area 103 to the area 106 adjacent to the outside of the end of the area 103 is held in the storage circuit 11 (for example, FIG. 2B) Status) The recording data UD_103 is recorded in the area 103 via the recording circuit 12.

  The reproduction operation and the recording operation may be performed continuously. If the recording data from the area 103 to the area 106 adjacent to the outside of the end of the area 103 is held in the storage circuit 11 when the reproduction up to the area 102 is completed, the recording circuit 12 continues the reproduction operation via the recording circuit 12. The recording data UD_103 may be recorded in the area 103.

  When the recording data UD_103 is completely recorded in the area 103, the recording can be continued if the storage circuit 11 holds the recording data for at least one round following the next recording area. For example, if recording data UD_107 to be recorded in the area 107 adjacent to the outside of the end of the area 104 following the area 103 is held in the storage circuit 11, the area 104 is connected via the recording circuit 12 following the recording in the area 103. Recording data UD_104 is recorded. Recording in the area 105 can be continued similarly.

  When the recording data UD_105 is completely recorded in the area 105, the recording data UD_109 to be recorded in the area 109 adjacent to the outside of the end of the subsequent area 106 is not held in the storage circuit 11 (state in FIG. 2C). That is, recording data for at least one round following the recording area is not held in the storage circuit 11. Therefore, the controller temporarily stops the recording operation. Next, the reproduction circuit 15 reproduces at least one area (from the area 109 to the area 111) following the area 108 in which the last recording data UD_108 held in the storage circuit 11 is recorded. Recording data UD_111 is stored in the storage circuit 11 from the obtained recording data UD_109. Thereafter, the recording data UD_108 from the remaining recording data UD_106 held in the storage circuit 11 is recorded from the area 106 to the area 108 via the recording circuit 12, and the recording of all the recording data is completed.

  Next, FIG. 7 will be added to FIGS. 1 and 3, and the recording operation when recording data to be recorded from the area 103 of the disk 14 to the area 118 will be described in detail. FIG. 7 is a diagram showing recording data held by the storage circuit 11, data with diagonal lines indicates recording data recorded on the disk 14, and data without diagonal lines indicates recording data not recorded on the disk 14. . Here, the number of recording data that can be held by the storage circuit 11 is 12, which is smaller than 16 of the number of recording data to be recorded.

  First, recording data (UD_103) to be recorded in the area 103 is received from an external device and held in the storage circuit 11. The recording data held in the storage circuit 11 at this time is as shown in FIG. An area that may destroy recorded data when a track deviation occurs during binary data recording in the area 103 is adjacent to the inside of the end of the area 103 from the area 100 adjacent to the inside of the starting edge of the area 103. From the region 105 adjacent to the outside of the start end of the region 103 to the region 106 adjacent to the outside of the end of the region 103.

  The controller reproduces at least one turn inside the recording start portion and holds the recording data. When the area 103 serves as a recording start portion, the reproducing circuit 15 reproduces the area from the area 100 adjacent to the inner end of the area 103 to the area 102 immediately before the area 103. An area UD_102 is stored in the storage circuit 11 from the obtained recording data UD_100.

  In parallel with the reproducing operation, if there is an unused area in the storage circuit 11, recording data reception from an external device may be continued. When the recording data UD_111 is held in the storage circuit 11, the unused area disappears. When there is no unused area, reception of recording data from the external device is temporarily stopped.

  The controller starts recording if recording data for at least one round following the recording area is held in the storage circuit 11. When the area 103 serves as a recording start portion, if the recording data from the area 103 to the area 106 adjacent to the outside of the end of the area 103 is held in the storage circuit 11 (state in FIG. 7B) The recording data UD_103 is recorded in the area 103 via the recording circuit 12.

  The reproduction operation and the recording operation may be performed continuously. If the recording data from the area 103 to the area 106 adjacent to the outside of the end of the area 103 is held in the storage circuit 11 when the reproduction up to the area 102 is completed, the recording circuit 12 continues the reproduction operation via the recording circuit 12. The recording data UD_103 may be recorded in the area 103.

  When the recording data UD_103 is completely recorded in the area 103, the next recording area becomes the area 104. At this time, the recording data held in the storage circuit 11 is as shown in FIG. Since the area 101 to the area 103 corresponding to at least one round inside the area 104 is necessary for recovery when an unexpected track deviation to the inside occurs, the recording data UD_100 is stored in the storage circuit 11. It is not necessary to hold. Therefore, the area holding the recording data UD_100 is released to be an unused area (FIG. 7D). When there is an unused area in the storage circuit 11 where the recording data can be received, the recording data reception from the external device is resumed (FIG. 7E).

  When the recording data UD_103 is completely recorded in the area 103, the recording can be continued if the storage circuit 11 holds the recording data for at least one round following the next recording area. For example, if recording data UD_107 to be recorded in the area 107 adjacent to the outside of the end of the area 104 following the area 103 is held in the storage circuit 11, the area 104 is connected via the recording circuit 12 following the recording in the area 103. Recording data UD_104 is recorded. Recording in the area 105 and thereafter can be similarly continued.

  When the recording data UD_110 is completely recorded in the area 110, the area holding the recording data UD_107 is released and unused as shown in FIG. However, since all the recording data up to the recording data UD_118 has already been received, the unrecorded area remains as it is.

  When the recording data UD_115 is completely recorded in the area 115, the recording data UD_119 to be recorded in the area 119 adjacent to the outside of the end of the subsequent area 116 is not held in the storage circuit 11 (state shown in FIG. 2G). That is, recording data for at least one round following the recording area is not held in the storage circuit 11. Therefore, the controller temporarily stops the recording operation. Next, the reproduction circuit 15 reproduces at least one area (from the area 119 to the area 121) following the area 118 in which the last recording data UD_118 held in the storage circuit 11 is recorded. The recording data UD_121 from the obtained recording data UD_119 is held in the memory circuit 11 (FIG. 7 (h)). Thereafter, the recording data UD_118 from the remaining recording data UD_116 held in the storage circuit 11 is recorded from the region 116 to the region 118 via the recording circuit 12, and the recording of all the recording data is completed (FIG. 7 ( i)). After the recording of all data is completed, the recording data UD_121 may be deleted from the storage circuit 11 from the recording data UD_116.

  A process when an unexpected track deviation occurs will be described with reference to FIGS. FIG. 4 is a diagram showing an example of the trajectory of the light beam when an out-of-track occurs inside during recording in the area 103. FIG. 5 is a diagram showing an example of the trajectory of the light beam when an out-of-track occurs during recording in the area 103. FIG. 6 is a diagram showing an example of the trajectory of the light beam when an out-of-track occurs during recording in the area 107.

  First, a process in the case where an unexpected track deviation to the inside occurs will be described. As shown in FIG. 4, when an out-of-track occurs during recording in the area 103, the out-of-track detection circuit 16 detects that an out-of-track has occurred. When the off-track detection circuit 16 detects that a off-track has occurred, the controller immediately stops the recording operation. However, since the detection of the off-track is accompanied by a slight detection delay, recording may be performed on a part of the area 101 and the data recorded in the area 101 may be destroyed.

  The data held in the storage circuit 11 during recording in the area 103 is in the state shown in FIG. 2B, and the recording data UD_101 recorded in the area 101 is held in the storage circuit 11. The controller records the recording data UD_101 in the area 101. Thereby, the area 101 destroyed by overwriting can be restored. When the restoration of the area 101 is completed, the controller performs recording in the area 103 again.

  Next, a process in the case where an unexpected outside track has occurred will be described. As shown in FIG. 5, when an out-of-track occurs during recording in the area 103, the out-of-track detection circuit 16 detects that an out-of-track has occurred. When the off-track detection circuit 16 detects that a off-track has occurred, the controller immediately stops the recording operation. However, since the detection of the off-track is accompanied by a slight detection delay, recording may be performed on a part of the area 105 and the data recorded in the area 105 may be destroyed.

  The data held by the storage circuit 11 during recording in the area 103 is in the state shown in FIG. 2B, and the recording data for at least one round following the recording area is held in the storage circuit 11. Since the area 105 is an area to be recorded from now on, it is not necessary to restore the area 105, and the controller may perform the recording in the area 103 again.

  Further, processing in another case where an unexpected outtrack has occurred will be described. As shown in FIG. 6, when an out-of-track occurs during recording in the area 106, the out-of-track detection circuit 16 detects that an out-of-track has occurred. When the off-track detection circuit 16 detects that a off-track has occurred, the controller immediately stops the recording operation. However, since the detection of the off-track is accompanied by a slight detection delay, recording is performed on a part of the area 109 and the data recorded in the area 109 is destroyed.

  The data held by the storage circuit 11 during recording in the area 106 is in the state shown in FIG. 2D, and unrecorded data for at least one round following the recording area is not held in the storage circuit 11. The area 109 is not an area to be recorded from now on, but the recording data UD_109 recorded in the area 109 is held in the storage circuit 11. The controller records the recording data UD_109 in the area 109. Thereby, the area 109 destroyed by overwriting can be restored. When the restoration of the area 109 is completed, the controller performs recording in the area 106 again.

  As described above, according to the optical disk device of the present embodiment, since the recording can be executed in the state where the recording data on the inner side and the outer side adjacent to the area being recorded are held in the storage circuit while suppressing the decrease in the recording transfer rate. It is possible to provide an optical disc apparatus capable of recovering the destroyed data even when the track is lost during recording and the data (adjacent information) of the adjacent track is destroyed.

  It should be noted that the same effect can be obtained even if the recording data sent from the external device is divided and sent. This will be described with reference to FIG. FIG. 8 is a diagram showing recording data held by the storage circuit 11, data with diagonal lines indicates recording data recorded on the disk 14, and data without diagonal lines indicates recording data not recorded on the disk 14. .

  Recording data to be recorded from the area 103 to the area 118 of the disk 14 is divided into three areas, the area 103 to the area 109 of the disk 14, the area 110 to the area 114 of the disk 14, and the area 115 to the area 118 of the disk 14. Suppose you come. First, when the recording data from the area 103 to the area 109 of the disk 14 is received, the recording data held by the storage circuit 11 is as shown in FIG. Since the storage circuit 11 holds recording data for one or more rounds following the area 103, recording can be started in the area 103 without reproducing the area 110 and subsequent areas. Next, as shown in FIG. 8B, when the recording into the area 106 is completed, the recording data from the area 110 to the area 114 of the disk 14 is sent from the external device and held in the storage circuit 11. If so, it is possible to continue recording after the area 107. Similarly, as shown in FIG. 8C, when the recording in the area 111 is completed, the recording data from the area 115 to the area 118 of the disk 14 is sent from the external device and held in the storage circuit 11. If so, it is possible to continue recording from the area 112 onward. In this way, even when the recording data sent from the external device is sent in a divided manner, the off-track occurs during recording and the adjacent track data is destroyed without performing unnecessary playback operation. Even if it is lost, the corrupted data can be recovered.

  It should be noted that the area to be played back and stored in the storage circuit 11 before the start of recording can be determined by calculation even if the detailed arrangement relationship of each area is not known. For example, it is assumed that the disk 14 has a CLV format in which the length of each area is a fixed length L. Assuming that the radius position of the area to be recorded is R, the number N of areas included in one circumference is N = 2πR / L. Assuming that the smallest integer equal to or greater than N is M, the recording data in the area up to the M area before the recording start area may be held in the storage circuit 11. For example, it is assumed that the number of regions included in one turn at the radius where the region 103 is located is about 2.3. The smallest integer greater than or equal to 2.3 is 3. Therefore, it is only necessary to hold the recording data from the area 100 to the area 102, that is, the area 100 to the area 102.

  Note that whether or not to reproduce the area following the last unrecorded data held in the storage circuit 11 after temporarily interrupting recording can be determined by the storage circuit 11 even if the detailed arrangement relationship of each area is not known. It can be determined from the number of continuous recording data held. For example, it is assumed that the disk 14 has a CLV format in which the length of each area is a fixed length L. Assuming that the radius position of the area to be recorded is R, the number N of areas included in one circumference is N = 2πR / L. If the minimum integer equal to or greater than N is M, the last unrecorded data held in the storage circuit 11 is not stored in the storage circuit 11 unless the recording data in the area up to the M area following the recording start area is held. What is necessary is just to reproduce | regenerate the area | region which continues. For example, it is assumed that the number of regions included in one round at the radius where the region 106 is located is about 2.5. The smallest integer greater than or equal to 2.5 is 3. Therefore, if the recording data from the third area following the recording area, that is, the recording data from the area 106 to the area 109 is not held in the storage circuit 11, the area following the last unrecorded data held in the storage circuit 11 is reproduced. That's fine. At this time, the number of areas to be reproduced is M.

  In addition, when the number N of areas included in one rotation is obtained by calculation, it is preferable to consider individual differences of the disks 14. A certain amount of error is recognized in the physical shape of the disk 14 (for example, the length L of the region). Therefore, it is preferable to use a slightly larger value than the actual number of regions with respect to the number of regions N obtained using standard values. For example, the length L of the area may be calculated as a value that is several percent smaller, or a predetermined value may be added to the number N of areas obtained using a standard value.

  It should be noted that the repair process in the event of an unexpected track deviation may be performed after all the recording data held in the storage circuit 11 has been recorded on the disk 14. In this case, the data to be restored may be held in the storage circuit 11 until the restoration process is completed.

  Note that the present invention can also be applied to a write-once disc in which the disc 14 cannot be rewritten. In the case of a write-once disc, a so-called replacement process in which the recording position is changed to an unused area such as a spare area in place of data restoration by overwriting in the repair process in the event of an unexpected off-track occurs. .

  It should be noted that in the recovery process in the event of an unexpected track detachment, it was determined that the recording for recovering the data requires the recovery circuit 15 to recover the area where the data may have been destroyed and to recover it. It may be done only when. The determination of the necessity for restoration (for example, whether or not the destruction amount is equal to or greater than a predetermined value) may be performed based on the mismatched data amount by comparing the reproduction data with the data held in the storage circuit 11 or during reproduction. This may be performed depending on whether error correction is possible. Even when error correction is possible at the time of reproduction, it is preferable to restore the data if the amount of error data is a predetermined number or more. When error correction is possible at the time of reproduction, it is possible to recover by recording not the recording data held in the storage circuit 11 but recording data obtained as a result of error correction. Further, the length of the amplitude reduction portion of the reproduction signal input to the reproduction circuit 15 during reproduction may be used.

  In this way, it is possible to perform recording only on the area that needs to be repaired, and the number of times of recording on the same area is not inadvertently increased. Further, when the disk 14 is of the write-once type, unnecessary replacement recording can be omitted, so that the reduction of the spare area can be minimized.

  If the off-track detection circuit 16 detects the off-track but does not detect the off-track direction, the area adjacent to the inner and outer circumferences of the area where the off-track has occurred is reproduced by the reproduction circuit 15 and needs to be restored. A repair process may be performed on an area determined as (for example, the destruction amount is equal to or greater than a predetermined value). At this time, when the recording data of the area adjacent to the outer periphery of the area where the track deviation has occurred in the storage circuit 11 is not yet recorded, the confirmation on the outer peripheral side may be omitted.

  Note that after the recording of all data is completed, at least one turn of the last recorded data may be held in the storage circuit 11. In the case of an optical disc, data is often appended to an area where recording has already been completed, so there are cases where the playback operation before the start of recording can be omitted. This is particularly useful for a write-once optical disc. For example, in FIG. 7, the recording data UD_119 to the recording data UD_121 are discarded and the recording data UD_116 to the recording data UD_118 are held in the storage circuit 11 in the state of FIG. . Then, when the recording data is sent from the external device to the area 121, the procedure for reproducing the recording data UD_118 from the recording data UD_116 by the reproducing circuit 15 can be omitted.

  Further, as shown in FIG. 9, a boundary data storage circuit 20 may be provided separately from the storage circuit 11. 9 is a block diagram showing the configuration of the optical disk apparatus according to the first embodiment, and 20 is a boundary data storage circuit. 9, the same components as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

  In this case, when the recording of all data is completed, the recording data for one round immediately before the recording end point is output from the storage circuit 11 to the boundary data storage circuit 20. When an unexpected track deviation occurs, the record data to be recovered from the boundary data storage circuit 20 may be output to the storage circuit 11 and recovered. Further, the recording data for one round immediately after the recording start point may be held in the storage circuit 11 or the boundary data storage circuit 20. For example, in FIG. 7B, if the recording data UD_105 is continuously held from the recording data UD_103, for example, when recording data from the area 100 to the area 102 is sent from the external device, at least one following the area 102 is received. The reproduction process for the circumference can be omitted.

  When the recording data for one round immediately after the recording end point and the recording data for one round immediately after the recording start point are continuously held in the storage circuit 11 or the boundary data storage circuit 20, the recording end and the recording start end are the same. When recorded data is held, the data can be deleted. This will be described with reference to FIG. FIG. 10 is a diagram showing recording data held by the boundary data storage circuit 20. For example, recording is performed on the recording area A from the area 103 to the area 110, and the recording data UD_103 to the recording data UD_105 at the beginning of the recording area A and the recording data UD_108 from the recording data UD_108 at the end of the recording area A are boundaries. It is assumed that recording is performed on the recording area B from the area 111 to the area 118 while being held in the data storage circuit 20. In this case, when the recording data UD_113 from the recording data UD_111 at the start of the recording area B and the recording data UD_118 from the recording data UD_116 at the end of the recording area B are held in the boundary data storage circuit 20, they are held in the boundary data storage circuit 20. The recorded data is as shown in FIG. However, the recording end of the recording area A and the recording start end of the recording area B are the same, and the recording data held as the recording end of the recording area A and the recording start end of the recording area B are data of one continuous area. Since this portion of recording data cannot be an area adjacent to the recording area during a new recording operation, it can be deleted from the boundary data storage circuit 20. Further, if a non-volatile memory is used for the boundary data storage circuit 20, the boundary data can be held even when the power is cut off.

  The number of recording data that can be held by the storage circuit 11 is larger than the number of recording data sent from the external device, and the recording data sent from the external device and at least one round inside the recording start portion and the recording end portion When recording data for at least one outer turn can be stored, at least one turn inside the recording start portion and at least one turn outside the recording end portion are reproduced by the reproduction circuit 15, and from the recording start portion. Recording data sent from an external device may be recorded on the disk 14 after holding the recording data for at least one inner turn and at least one turn outside the recording end portion in the storage circuit 11.

  It should be noted that the area for at least one round inside the recording start portion reproduced by the reproduction circuit 15 and at least one round following the recording area may be reproduced regardless of whether the area is valid or invalid. Of these, areas that are found to be invalid need not be restored even if they become areas to be restored. For example, it is determined that an area where the reproduction signal input to the reproduction circuit 15 does not have sufficient amplitude, an area where recording data cannot be acquired correctly as a result of reproduction, an area where replacement recording is replaced, and the like are invalid areas. The invalid area may be determined by other methods. In addition, it is not necessary to perform data acquisition by reproduction for an area that can be determined to be invalid by a replacement record replacement source or another method.

  As described above, the information recording apparatus in Embodiment 1 mainly has the following configuration.

  That is, the information recording apparatus in the first embodiment includes a storage unit, a recording unit, and a track off detection unit. The information recording apparatus records the recording information held in the storage unit on a recording medium in which regions are arranged in a spiral shape or a concentric shape via the recording unit. The information recording apparatus is adjacent to the area where the recording information was recorded, using the repair information held in the storage means when the off-track detection means detects the off-track while recording the recording information. Repair neighboring information recorded in the area. At this time, the information recording apparatus records the recording information on the recording medium while holding the repair information in the storage unit.

  According to this configuration, even if the off-track occurs during recording and the recorded data in the adjacent area (for example, the adjacent track) is destroyed by overwriting or the like, the data stored in the storage circuit is used to record the adjacent area. Data can be recovered.

  Further, the information recording apparatus in Embodiment 1 holds the recording information recorded on the recording medium in the storage means as repair information until the recording information for one round following the recorded recording information is completed. Also good.

  Further, the storage means for holding the recorded information that has already been recorded may be constituted by a nonvolatile memory.

  In the information recording apparatus according to the first embodiment, the recording unit stores the one block of recording information following the recording information of one block to be recorded next in the storage unit as the restoration information. May be recorded on a recording medium.

  In addition, the information recording apparatus in the first embodiment may include a reproducing unit that reads information recorded on the recording medium. At this time, if the repair information held in the storage means is less than one revolution, the information recording apparatus reads the adjacent information of the portion that is insufficient for one revolution from the recording medium via the reproducing means, adds the information to the repair information, and stores The repair information may be held for one round in the means.

  In addition, the information recording apparatus according to Embodiment 1 includes a reproducing unit that reads information recorded on the recording medium, and an area adjacent to the area where the recorded information is recorded when the off-track detecting unit detects the off-track. The adjacent information may be read by the reproducing means, the destruction amount of the adjacent information is measured, and if the destruction amount is equal to or greater than a predetermined value, the adjacent information may be restored.

  Further, the restoration of the adjacent information may be performed only when the adjacent area is an effective area. The “effective area” is, for example, an area that is not the “invalid area” described above.

  Furthermore, the measurement of the destruction amount of the adjacent area may be performed only when the adjacent area is an effective area.

  In addition, the information recording apparatus according to the first embodiment holds recording information that has not been recorded in the storage unit among the repair information for one round following the recording information when the off-track detection unit detects the off-track. Neighboring information may be repaired for areas other than the area being used.

(Embodiment 2)
The optical disk device according to Embodiment 2 of the present invention will be described with reference to FIGS. In FIG. 11, the same components as those in FIG.

  FIG. 11 is a block diagram showing a configuration of the optical disk apparatus according to the second embodiment, and 21 is an address detection circuit. FIG. 12 is an explanatory diagram of the out-of-track detection in the out-of-track detection circuit 16, wherein 91 is a tracking error signal, 92 is a first threshold value, and 93 is a second threshold value.

  The optical pickup 13 outputs a wobble signal corresponding to the meandering shape of the track of the optical disk 14 to the address detection circuit 21. The address detection circuit 21 detects address information recorded in the meandering shape of the track on the disk 14 from the wobble signal input from the optical pickup 13.

  The off-track detection circuit 16 detects the off-track when the tracking error signal 91 exceeds a predetermined threshold value. That is, the off-track detection circuit 16 has a function of comparing and monitoring the off-track index value based on the tracking error signal and a preset threshold value. The lower this threshold is set, the faster the track off can be detected and the detection delay becomes shorter. The shorter the detection delay, the less data is destroyed. If there is data destroyed at the time of off-track, it takes time to repair the data, which causes a decrease in the recording transfer rate. Therefore, the first threshold 92 is preferably set so that the data is not destroyed when the track is off, or even within the range that can be restored by error correction. Further, even when the tracking error signal 91 has an amplitude fluctuation and the peak value is lowered, it is possible to detect the off-track without omission.

  For example, in FIG. 12, it is assumed that the track is off in the section B. In the section B, the tracking error signal 91 changes greatly. After passing through section B, the light beam scans the adjacent track. When the threshold value is the first threshold value 92, it is possible to detect an out-of-tracking even when the amplitude of the tracking error signal 91 in the section B is slightly reduced. However, when the threshold value is set to the second threshold value 93, there is a possibility that the tracking error cannot be detected when the amplitude of the tracking error signal 91 in the section B is slightly reduced.

  Next, the operation of the off-track detection circuit 16 in the section A in FIG. 12 will be described. In the section A, the tracking error signal 91 varies. However, suppose that it is not so much that track off occurs. When the threshold value is the first threshold value 92, the amplitude of the tracking error signal 91 in the section A detects the out-of-track value. However, in the section A, since no track off actually occurs, this detection is a false detection. If the off-track is detected during the recording operation, the controller immediately stops the recording operation. Since the recording is not completed for the area where the recording operation is stopped, the controller executes the recording operation again. Here, it is assumed that the fluctuation of the tracking error signal 91 generated in the section A is due to the surface of the disk 14 being scratched. Then, when the section A is recorded again, the tracking error signal 91 fluctuates. For this reason, the off-track detection circuit 16 erroneously detects off-track, and recording in the recording area including the section A cannot be completed.

  Therefore, when the off-track is detected many times at the same place, the threshold of the off-track detection circuit 16 is changed to a value that is looser than the first threshold 92, for example, the second threshold 93. When the threshold value is the second threshold value 93, the tracking error signal 91 in the section A has an amplitude smaller than the threshold value, so the off-track detection circuit 16 does not detect the off-track. However, if there is a track detachment due to other factors such as an external impact, the track detachment may not be detected. Therefore, recording may be performed after the recording data in the recording area adjacent to the recording track is held in the storage circuit 11. For example, the method shown in the first embodiment may be used to hold the recording data in the recording area adjacent to the recording track, or another known method may be used.

  If a track outage occurs when the threshold value of the track out detection circuit 16 is changed to a loose value, the address detection circuit 21 can detect the out of track even if the track out detection circuit 16 cannot detect the out of track. it can. The address information recorded on the disk 14 is assigned to each area according to a predetermined rule. In many cases, a number that increases monotonously as the area progresses is assigned as address information. Therefore, if the address information detected by the address detection circuit 21 does not conform to a predetermined rule, or if the address information is not detected even after a predetermined time has elapsed, the controller performs a recording operation on the assumption that an off-track has occurred. Can be stopped. In particular, when the address information detected by the address detection circuit 21 does not conform to a predetermined rule, if the address information is smaller than the expected address information, the track jumps inward, and if the address information is larger than the expected address information, the track outwards. It can also be judged as a jump.

  However, since a large detection delay occurs in the determination of the track deviation using the address information, the recorded data in the adjacent area is not a little destroyed. However, since the recording data in the area adjacent to the memory circuit 11 is held, the destroyed recording data can be restored by using the method described in the first embodiment.

  Here, when recording data is recorded from the area 103 to the area 118 of the disk 14 with reference to FIGS. 13, 14, and 15, the tracking error signal 91 fluctuates due to scratches in the areas 104, 108, and 117, respectively. A specific operation in the case where the occurrence of the error occurs and the off-track is detected will be described. However, it is assumed that the tracking error signal 91 fluctuates in each region not so much as to cause off-track. 13 to 15 are diagrams showing recording data held by the storage circuit 11.

  In any case, the recording data (UD_103) to be recorded in the area 103 is received from the external device and held in the storage circuit 11. The controller sets the threshold of the off-track detection circuit 16 to the first threshold 92 and starts recording. With respect to the recording data for which recording has been completed, it is only necessary to hold in the memory circuit 11 at least one turn inside the start end of the area to be continuously recorded, as in the first embodiment. Further, the recording data received from the external device may be received so that the unused area for at least one round inside the start end of the area to be continuously recorded remains in the storage circuit 11.

  First, a case will be described in which off-track is detected due to fluctuations in the tracking error signal 91 during recording in the area 104. During recording to the area 104, the track off detection circuit 16 detects the track off due to a scratch on the disk 14, and the controller immediately stops the recording operation. The recording data held in the storage circuit 11 at this time is as shown in FIG. The controller reproduces the area 102 to the area 102 by the reproduction circuit 15 and records from the recording data UD_101 in order to hold the recording data UD_103 from the recording data UD_101 in the storage circuit 11 for at least one round inside the start end of the area 104. Data UD — 102 is held in the memory circuit 11. The recording data held in the memory circuit 11 at this time is as shown in FIG. Since the storage circuit 11 holds the recording data UD_107 from at least one round outside the end of the area 104, that is, the recording data UD_105, it is not necessary to acquire it from the disk 14. The controller sets the threshold value of the off-track detection circuit 16 to the second threshold value 93 that is looser than the first threshold value 92 and starts recording in the area 104. When the recording in the area 104 is completed, the recording in the area 105 and thereafter is continued. The threshold of the off-track detection circuit 16 may be returned to the first threshold 92 after the recording in the area 104 is completed.

  Next, a case where an out-of-track is detected due to a change in the tracking error signal 91 during recording in the area 108 will be described. During recording in the area 108, the track off detection circuit 16 detects the track off due to a scratch on the disk 14, and the controller immediately stops the recording operation. The recording data held in the storage circuit 11 at this time is as shown in FIG. The recording data for at least one turn inside the start end of the area 108 and for at least one turn outside the end of the area 108 is held in the storage circuit 11, so it is not necessary to acquire it from the disk 14. The controller sets the threshold of the off-track detection circuit 16 to a second threshold 93 that is looser than the first threshold 92, and starts recording in the area 108. When the recording in the area 108 is completed, the recording in the area 109 and thereafter is continued. The threshold of the off-track detection circuit 16 may be returned to the first threshold 92 after the recording in the area 109 is completed.

  Further, a case where an out-of-track is detected due to the fluctuation of the tracking error signal 91 during recording in the area 117 will be described. During recording in the area 117, the track off detection circuit 16 detects the track off due to a scratch on the disk 14, and the controller immediately stops the recording operation. The recording data held in the storage circuit 11 at this time is as shown in FIG. The controller reproduces the area 121 to the area 121 by the reproduction circuit 15 and records from the recording data UD_119 in order to hold the recording data UD_121 from the recording data UD_118 in the storage circuit 11 for at least one round outside the end of the area 117. Data UD — 121 is held in the memory circuit 11. The recording data held in the storage circuit 11 at this time is as shown in FIG. The recording data for at least one round inside the start end of the area 117 is held in the storage circuit 11 and need not be acquired from the disk 14. The controller sets the threshold of the out-of-track detection circuit 16 to the second threshold 93 that is looser than the first threshold 92 and starts recording in the area 117. When the recording in the area 117 is completed, the recording in the area 118 is continued. The threshold of the off-track detection circuit 16 may be returned to the first threshold 92 after the recording in the area 117 is completed.

  As described above, according to the optical disk apparatus of the present embodiment, an optical disk capable of recording in a place where a tracking error signal fluctuates every time while preventing a loss of data due to a decrease in recording transfer rate and a track off during recording. A device can be provided.

  Note that the threshold value set in the off-track detection circuit 16 may be switched according to the recording data held in the storage circuit 11. If the storage circuit 11 holds recording data for at least one round inside the start of the recording area and at least one round outside the end of the recording area, the second threshold 93 is set. In this case, the first threshold 92 may be set. In particular, when the disk 14 is a write-once disk, it is possible to reduce the consumption of the spare area used for the alternate recording. In the write-once disc, the recording error cannot be re-recorded in the recording area in which the off-track detection circuit 16 detects the off-track and the controller stops the recording operation. The recording data to be rerecorded is recorded alternately in the spare area. If the spare area is used up, the disc may be prohibited from recording. When the off-track is frequently erroneously detected, the spare area is reduced by the alternate recording for re-recording. As the number of sections in which the second threshold 93 is set increases, the number of erroneous detections of off-track can be reduced, so that spare area consumption can be reduced.

  Note that the operation of the controller when the off-track detection circuit 16 detects off-track may be switched by the recording data held in the storage circuit 11. Here, the threshold set in the off-track detection circuit 16 is the first threshold 92. When the off-track detection circuit 16 detects off-track, the recording data for at least one round inside the start of the recording area and at least one round outside the end of the recording area are stored in the storage circuit 11. If held, the controller continues without stopping the recording operation, keeps the recording data in the recording area and the adjacent area in the storage circuit 11, and further detects the off-track. The number of the recorded area is stored. After all the recording data has been recorded, it is checked whether there is any destruction in the recorded data in the area recorded when the recorded track deviation is detected and the area adjacent thereto. When there is destruction, the recording data kept in the storage circuit 11 is used for recovery. When the off-track detection circuit 16 detects off-track, the recording data for at least one round inside the start of the recording area and at least one round outside the end of the recording area are stored in the storage circuit 11. If not, the controller stops the recording operation. In this way, by first confirming and recovering the destruction of the recorded data after completing the recording operation, the recorded data received from the external device can be quickly recorded on the disk 14, and the recorded data is lost due to a power failure or the like. The possibility of doing so can be reduced.

  In addition, although the case where the threshold value is set on the upper side with respect to the reference point has been described as an example in FIG. 12, the threshold value may be similarly set on the lower side. At this time, the magnitude of the threshold may be the same as that on the upper side, or may be different as shown in FIG. FIG. 16 is an explanatory diagram of the out-of-track detection in the out-of-track detection circuit 16, wherein 91 is a tracking error signal, 93 is a second threshold value, and 94 is a third threshold value. For example, it is assumed that when the tracking error signal 91 exceeds the second threshold value 93, the outside track off is detected, and when the tracking error signal 91 exceeds the third threshold value 94, the inside track off is detected. Here, the third threshold value 94 is set to a value that does not destroy the recording data in the adjacent area like the first threshold value 92. With such a setting, when recording data is recorded in a continuous area, the already recorded area is not destroyed by the off-track, and erroneous detection of off-track to the outside can be reduced. Further, the second threshold value 93 is held at a strict value so that the data in the adjacent area is not destroyed by the off-track when at least one round outside the end of the area recorded in the storage circuit 11 is not held. In this case, it may be set to a loose value that reduces false detection. Similarly, the third threshold value 94 is also held at a severe value so that the data in the adjacent area is not destroyed by the off-track when at least one round inside the start end of the area to be recorded in the storage circuit 11 is not held. If it is, it may be set to a loose value that reduces false detection.

  As described above, the information recording apparatus in Embodiment 2 mainly has the following configuration as an example of the configuration.

  That is, the information recording apparatus according to the second embodiment includes a storage unit, a recording unit, and a track off detection unit. The information recording apparatus records the recording information held in the storage unit on a recording medium in which regions are arranged in a spiral shape or a concentric shape via the recording unit. The information recording apparatus is adjacent to the area where the recording information was recorded, using the repair information held in the storage means when the off-track detection means detects the off-track while recording the recording information. Repair neighboring information recorded in the area. Further, the off-track detection means has a function of comparing and monitoring the off-track index value based on the tracking error signal and a preset threshold value. As the threshold value, at least a strict first value that does not cause a detection error of off-track and a second value that is looser than the first threshold value can be selectively set. At this time, when the second value is set for the threshold, the information recording apparatus records the recording information on the recording medium while holding the repair information in the storage unit.

  According to this configuration, it is possible to perform recording even in a place where a tracking error signal fluctuates every time while preventing a loss of data due to a decrease in recording transfer rate and a loss of track during recording.

  Further, when an address number is assigned to the area of the recording medium so as to monotonously increase in the recording direction, in the information recording apparatus according to the second embodiment, the off-track detection means moves toward the side where the address number becomes smaller. It is also possible to detect off-track. At this time, when the second value is set as the threshold value, the information recording device is adjacent to the area where the record information is recorded, and is assigned to the area assigned with an address number smaller than the address number where the record information is recorded. The record information may be recorded on the recording medium in a state where the adjacent information is held in the storage means as repair information.

  Further, when an address number is assigned to the area of the recording medium so as to increase monotonously with respect to the recording direction, in the information recording apparatus according to the second embodiment, the off-track detection means moves toward the side where the address number becomes larger. It is also possible to detect off-track. At this time, when the second value is set as the threshold value, the information recording apparatus is configured to record a block of recording information adjacent to the area where the recording information of one block to be recorded next is recorded. One block of recording information may be recorded on a recording medium in a state where recording information to be recorded in an area to which an address number greater than the address number is allocated is stored in the storage means as repair information.

  Moreover, the information recording apparatus in Embodiment 2 mainly has the following configuration as another example of the configuration.

  That is, the information recording apparatus according to the second embodiment includes a storage unit, a recording unit, and a track off detection unit. The information recording apparatus records the recording information held in the storage unit on a recording medium in which regions are arranged in a spiral shape or a concentric shape via the recording unit. The information recording apparatus is adjacent to the area where the recording information was recorded, using the repair information held in the storage means when the off-track detection means detects the off-track while recording the recording information. Repair neighboring information recorded in the area. At this time, the information recording apparatus records the recording information on the recording medium while holding the repair information in the storage unit. Further, the off-track detection means has a function of comparing and monitoring the off-track index value based on the tracking error signal and a preset threshold value. As the threshold value, at least a strict first value with no omission detection error and a second value that is looser than the first value can be selectively set. At this time, the information recording apparatus sets the second value as the threshold when recording information on the recording medium in a state where the repair information is held in the storage unit.

  Further, when an address number is assigned to the area of the recording medium so as to monotonously increase in the recording direction, in the information recording apparatus according to the second embodiment, the off-track detection means moves toward the side where the address number decreases. It is also possible to detect off-track. At this time, the information recording apparatus holds, in the storage means, adjacent information of an area adjacent to the area where the recorded information is recorded and assigned an address number smaller than the address number of the recorded information area as repair information. When recording information is recorded on the recording medium in this state, a second value may be set as the threshold value.

  Further, when an address number is assigned to the area of the recording medium so as to increase monotonously with respect to the recording direction, in the information recording apparatus according to the second embodiment, the off-track detection means moves toward the side where the address number becomes larger. It is also possible to detect off-track. At this time, the information recording apparatus is adjacent to an area where the next block of recording information is recorded and is assigned to an area assigned an address number larger than the address number of the area where the recording information of one block is recorded. When recording information of one block is recorded on a recording medium in a state where the recording information to be recorded is held in the storage unit as repair information, a second value may be set as the threshold value.

  In the first and second embodiments, the off-track detection method in the off-track detection circuit detects the off-track when the tracking error signal exceeds the threshold, but other detection methods may be used. . For example, it may be detected whether or not the time when the tracking error signal exceeds the threshold is equal to or longer than a predetermined time, or other known methods other than this may be used.

  In the first and second embodiments, the recording data to be recorded on the disk 14 has been described as being sent from an external device, but the present invention can also be applied to recording data generated in the optical disk device. The recording data generated in the optical disc apparatus includes, for example, replacement information having a replacement recording position.

  In the first and second embodiments, it has been described that the recording data is held in the storage circuit 11. However, an intermediate data form that can be converted into the recording data may be held in the storage circuit 11. This will be described in detail with reference to FIGS. FIG. 17 is a block diagram showing the configuration of the recording circuit 12 in more detail in the block diagram showing the configuration of the optical disc apparatus shown in FIG. Reference numeral 17 denotes an encoding circuit, 18 denotes a modulation circuit, and 19 denotes a laser driving circuit. The encoding circuit 17, the modulation circuit 18, and the driving circuit 19 constitute a recording circuit 12. FIG. 18 is a diagram showing data held in the memory circuit 11.

  The recording operation will be described in detail. The storage circuit 11 holds recording data sent from an external device. In response to an encoding instruction from the controller, the storage circuit 11 outputs the stored recording data to the encoding circuit 17. The encoding circuit 17 generates encoded data obtained by performing encoding processing such as error correction encoding and interleave processing on the recording data input from the storage circuit 11, and outputs the encoded data to the storage circuit 11. The storage circuit 11 holds encoded data input from the encoding circuit 17. Further, in response to a modulation instruction from the controller, the storage circuit 11 outputs the encoded data held therein to the modulation circuit 18. The modulation circuit 18 generates binary data subjected to modulation processing such as data conversion with limited run length and addition of a synchronization signal from the encoded data input from the storage circuit 11, and outputs the binary data to the storage circuit 11. The storage circuit 11 holds binary data input from the modulation circuit 18. Further, the storage circuit 11 outputs the stored binary data to the drive circuit 19 in response to a light emission instruction from the controller. The laser drive circuit 19 outputs a drive signal for driving the laser to the optical pickup 13 in accordance with the binary data input from the storage circuit 11. The optical pickup 13 irradiates a designated area of the optical disc 14 with a light beam in accordance with a drive signal input from the laser drive circuit 19 to generate a mark and a space.

  Thus, since the recording data passes through an intermediate data form such as encoded data or binary data, these may be held in the storage circuit 11. For example, immediately after receiving recording data from an external device, encoding processing and modulation processing are performed, and the recording data is converted into a binary data format and stored. Thereafter, binary data may be output to the laser drive circuit 19 in accordance with a recording instruction from the controller.

  In addition, a plurality of data forms may be held in the storage circuit 11 in a mixed state. For example, as shown in FIG. 18, the recording data immediately before recording is held as BIN_103 obtained by converting UD_103 into binary data, and the data to be recorded next is held as ECC_104 obtained by converting UD_104 into encoded data. The data may be retained in the recorded data format.

  In the first and second embodiments, the off-track detection is not performed by the off-track detection circuit 16, but a verify operation for reproducing the recording area after recording and confirming that there is no reproduction error, or reproduced data. Can also be performed by a compare operation for confirming that it matches the recorded data. When performing verification, it may be determined that an out-of-track has occurred in an area where the verification result is determined to be an error. In the case of performing the comparison, if the data of a predetermined amount or more does not match, it can be determined that the off-track has occurred in the mismatched section. When verifying or comparing is performed, the recording data is continuously held in the storage circuit 11 after the recording is completed, and the time when the verifying or comparing is completed may be handled as the recording completion described in the first and second embodiments.

  In the first and second embodiments, the area of the disk 14 is arranged in a spiral from the inside to the outside. However, the area may be arranged in a spiral from the outside to the inside. You just need to read inside and outside. The regions may be arranged concentrically. The address information recorded on the disk 14 may be assigned as address information a number that monotonously decreases as the area advances.

  In the first and second embodiments, the recording data held in the storage circuit 11 has been described as being at least one turn inside the start end of the area to be recorded and at least one turn outside the end. If there is sufficient capacity, it may be increased to two or three laps. If the number of recorded data to be held is increased, the reliability can be further improved.

  The information recording apparatus according to the present invention can recover even if the information of the adjacent area is destroyed during recording by performing recording after holding the information of the adjacent area in the storage circuit. Reliability can be improved and it is useful as data storage.

DESCRIPTION OF SYMBOLS 11 Memory circuit 12 Recording circuit 13 Optical pick-up 14 Disc 15 Playback circuit 16 Out-of-track detection circuit 17 Encoding circuit 18 Modulation circuit 19 Laser drive circuit 20 Boundary data storage circuit 21 Address detection circuit 91 Tracking error signal 92 First threshold value 93 First 2 threshold value 94 3rd threshold value 100-123 area

Claims (15)

A storage unit, a recording unit, and a track-out detection unit;
The recording information held in the storage means is recorded on a recording medium in which regions are arranged in a spiral or concentric manner via the recording means, and when the recording information is recorded, the off-track detection means An information recording device for repairing adjacent information recorded in an area adjacent to an area where the recording information was recorded using the repair information held in the storage means when a disconnection is detected,
An information recording apparatus for recording the recording information on the recording medium in a state where the repair information is held in the storage means. The recording information recorded on the recording medium is held in the storage unit as the repair information until recording information for one round following the recorded recording information is completed. The information recording device described in 1. The information recording apparatus according to claim 2, wherein the storage unit that holds the recorded information is a non-volatile memory. The recording means records the one block of recording information on the recording medium in a state where the recording information for one round following the recording information of one block to be recorded next is held in the storage means as the repair information. The information recording apparatus according to claim 1, wherein: Reproducing means for reading information recorded on the recording medium,
When the repair information held in the storage means is less than one round,
5. The adjacent information of a portion that is insufficient for one round is read from the recording medium through the reproducing unit, is added to the repair information, and the repair information is held in the storage unit for one round. Information recording device. Reproducing means for reading information recorded on the recording medium,
When the out-of-track detecting means detects an out-of-track, the adjacent information of the area adjacent to the area where the recording information was recorded is read by the reproducing means, the destruction amount of the adjacent information is measured, and the destruction amount is The information recording apparatus according to claim 1, wherein the adjacency information is restored when the value is equal to or greater than a predetermined value. The information recording apparatus according to claim 1, wherein the adjacent information is repaired only when the adjacent area is an effective area. 7. The information recording apparatus according to claim 6, wherein the measurement of the destruction amount of the adjacent area is performed only when the adjacent area is an effective area. When the off-track detection means detects off-track,
The adjacent information is restored to an area other than an area in which recording information that has not been recorded in the storage unit is stored in the restoration information for one round following the recording information. Item 4. The information recording device according to Item 1. The out-of-track detection means has a function of comparing and monitoring an out-of-track index value based on a tracking error signal and a preset threshold value,
The threshold value can be selectively set at least as a strict first value with no out-of-track detection omission and a second value looser than the first threshold value,
2. The information according to claim 1, wherein when the second value is set as the threshold, the recording information is recorded on the recording medium in a state where the repair information is held in the storage unit. Recording device. An address number is assigned to the area of the recording medium so as to monotonously increase in the recording direction,
The out-of-track detecting means detects out-of-track to the side where the address number becomes smaller,
When the second value is set as the threshold value,
The recording information is stored in the storage unit as adjacent information of an area adjacent to an area where the recording information is recorded and assigned an address number smaller than an address number for recording the recording information. The information recording apparatus according to claim 10, wherein recording is performed on the recording medium. An address number is assigned to the area of the recording medium so as to monotonously increase in the recording direction,
The out-of-track detecting means detects out-of-track to the side where the address number becomes larger,
When the second value is set as the threshold value,
Recording information recorded in an area assigned an address number larger than the address number of the area where the recording information of one block is recorded adjacent to the area where the recording information of one block to be recorded next is recorded is restored. 11. The information recording apparatus according to claim 10, wherein the recording information of the one block is recorded on the recording medium in a state of being held in the storage unit as information. The out-of-track detection means has a function of comparing and monitoring an out-of-track index value based on a tracking error signal and a preset threshold value,
The threshold value can be selectively set at least as a strict first value with no out-of-track detection omission and a second value looser than the first value,
2. The information recording apparatus according to claim 1, wherein when the recording information is recorded on the recording medium while the repair information is held in the storage unit, the second value is set as the threshold value. . An address number is assigned to the area of the recording medium so as to monotonously increase in the recording direction,
The out-of-track detecting means detects out-of-track to the side where the address number becomes smaller,
Adjacent to an area where the recording information is recorded, adjacent information of an area assigned an address number smaller than the address number of the area where the recording information is recorded is retained in the storage means as the repair information in the storage unit When recording information on the recording medium,
The information recording apparatus according to claim 13, wherein the second value is set as the threshold value. An address number is assigned to the area of the recording medium so as to monotonously increase in the recording direction,
The out-of-track detecting means detects an out-of-track toward the side where the address number is increased, and is adjacent to an area in which recording information of one block to be recorded is recorded, in an area in which recording information of the one block is recorded. When recording the one block of recording information on the recording medium in a state where recording information to be recorded in an area to which an address number larger than the address number is allocated is stored as the restoration information in the storage unit,
The information recording apparatus according to claim 13, wherein the second value is set as the threshold value.

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