JP4392593B2 - Optical disk recorder - Google Patents

Description

  The present invention relates to an optical disc recording apparatus for recording a signal on an optical disc.

  In recent years, writable optical disks have meandering (wobbling) between guide grooves (grooves) or between guide grooves (lands), the write clock to the optical disk is synchronized with those wobblings, and addresses are included in those wobblings. It has a function to embed information data.

  FIG. 9 shows waveforms of wobbling signals obtained from various optical disks. The horizontal axis represents time, and the vertical axis represents the amplitude of the signal. The change in amplitude represents the shape of the groove or land as it is. For example, FIG. 9A shows a wobbling signal having a basic frequency of a constant period, and is obtained from an optical disc in which a meandering groove or run is formed with a certain number of channel bits as a unit. The wobbling signals shown in FIGS. 9B, 9C, and 9D have a portion where the wobbling signal of FIG. 9A is frequency-modulated and a portion that is 180 degrees out of phase. However, there is a portion where a pulse-like signal is superimposed for every certain number of periods. FIG. 9C shows wobbling signals obtained from DVD + R and DVD + RW discs, in which address information is embedded in an area where a 180 ° phase shift exists. FIG. 9D shows a wobbling signal obtained from a DVD-R or DVD-RW disc, and a pulse-like signal is obtained from a prepit (land prepit) formed in a land portion. Address information is embedded in this land prepit.

  At the time of recording on the optical disc, information data is written using wobbling in which these address information is embedded. If a wobbling signal and an information data signal are stably detected during writing, stable writing to the optical disc is possible. Recording is performed. However, if those signals cannot be obtained stably for some reason, naturally, stable recording cannot be performed, or stable reproduction cannot be performed during reproduction. For example, when the wobbling signal is detected in a state that is not synchronized with the wobbling of the optical disc during recording, the write clock obtained from the wobbling signal is naturally generated without being synchronized with the wobbling. Recorded data recorded in such a situation cannot be played back during playback. In addition, if the optical disk is defective or if there is dust on the optical disk and the intensity of reflected light from the optical disk decreases, a reliable writing clock cannot be generated. Therefore, it is not preferable to continue recording in such a situation, and a method has been proposed in which recording is temporarily interrupted when such a situation occurs (see, for example, Patent Document 1).

According to this document, in the case of a DVD-RAM, the first based on the detection timing of the physical ID portion (physical address position) formed at 17 locations on the innermost track and 41 locations on the outermost track per track. The period and the second period based on the wobble PLL clock are detected, the state of the wobble PLL clock is determined based on both periods, and if it is determined that it is inappropriate to continue recording, the recording is interrupted. Also, recording is interrupted when a missing wobbling signal is detected.
JP 2000-82212 A (Page 6-9, Fig. 3-5)

  In the above-described prior art, a clock synchronization shift or a wobbling signal loss during recording is detected. However, in actual recording, not only during recording but also a clock synchronization deviation or the like may occur at the recording start time. In this case, recording is performed on the optical disc from the beginning with the clock shifted. In addition, there is a possibility that the synchronization deviation during recording will be enlarged.

  The present invention has been made in view of the above problems, and an object of the present invention is to monitor a synchronization state between an address signal detected from an optical disk and a wobble clock to detect a synchronization shift or to demodulate an address. Detects out-of-synchronization or disk defect due to an abnormal state of information, and records when out-of-synchronization exceeding a predetermined range or an abnormal state of demodulated address information occurs more than a predetermined threshold It is an object of the present invention to provide an optical disk recording apparatus capable of performing stable recording by re-starting the recording operation without starting the recording.

  In order to achieve the above object, according to the present invention, a wobbling data recording track is formed, and an optical disk on which an address information source that embodies address information is preformatted is irradiated with a light beam. An optical disk recording apparatus comprising: means for obtaining an address signal from the recording medium; and means for generating a clock signal using a signal obtained from the wobbling data recording track, wherein the address signal and the clock signal are out of synchronization. An optical disk recording, further comprising means for generating a synchronization deviation detection signal for detecting a recording error, and using the synchronization deviation detection signal to determine appropriate / inappropriate of the start of recording on the optical disk An apparatus is provided.

In order to achieve the above object, according to the present invention, a wobbling data recording track is formed and an optical disc on which an address information source embodying address information is preformatted is irradiated with a light beam, and the address is recorded. An optical disk recording apparatus comprising: means for obtaining an address signal from an information source; means for demodulating the address information from the address signal; and means for generating a clock signal using a signal obtained from the wobbling data recording track An optical disk recording apparatus is provided, wherein the address information is used to determine appropriate / inappropriate of starting recording on the optical disk.
Preferably, when data recording is started from an arbitrary target position on the optical disc, the synchronization deviation between the synchronization deviation detection signal and the clock signal is previously detected during a predetermined data recording start preparation period. When the number of occurrences of out-of-synchronization states that are out of a predetermined range or the number of occurrences of abnormal states in the demodulated address information reaches a number that is equal to or greater than a predetermined threshold, the start of recording is temporarily stopped. Cancel it.

  The optical disk recording apparatus according to the present invention uses the synchronization deviation detection signal for detecting the synchronization deviation between the address signal and the clock signal, or uses the address information to determine whether recording is started or not appropriate on the optical disk. Therefore, if it is determined that the start of recording is inappropriate, the start of recording is temporarily canceled to avoid erroneous recording. By starting recording in a stable state, it is possible to perform more stable recording from the correct recording start position.

Next, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, in the optical disk recording apparatus according to the present invention, a signal read by an optical head 3 from an optical disk 1 rotated by a motor 2 is supplied to a reproduction circuit 7. The rotation of the motor 2 is controlled by the control circuit 4. An address signal is detected by supplying a signal reproduced by the reproduction circuit 7 and passing through the band-pass filter 9 to the address detection circuit 10, and also supplied to the synchronization deviation detection signal generation circuit 11. A detection signal is generated. Further, the clock generation circuit 13 and the PLL circuit 14 generate a wobble clock and a recording channel clock. Using this synchronization error detection signal, recording channel clock, and address signal, the recording start inappropriate detection circuit 12 detects the synchronization error, and the recording start condition determination circuit 5 detects this synchronization error in a predetermined range. A determination is made as to whether or not. When the predetermined range is exceeded, the internal synchronization circuit 8 and the write gate generation circuit 6 control the optical head 3 so as to temporarily stop the recording, and set the recording start operation again. cure.

  Hereinafter, the optical disk recording apparatus of the present invention will be described in detail by taking several DVD specifications as examples.

In this embodiment, the optical disk recording apparatus of the present invention will be described for the DVD + R and DVD + RW specifications.
First, the wobble structure of DVD + R and DVD + RW discs will be described.
In the DVD + R and DVD + RW specifications, an ADIP (ADdress In Pre-groove) data unit consisting of 8 wobbles every 93 wobbles is formed. The remaining 85 wobbles are monotone wobbles, and a total of 93 wobbles of ADIP data units and monotone wobbles are defined as one ADIP bit. One ADIP word is composed of 52 ADIP bits.

  As shown in FIGS. 2A to 2C, there are three patterns (ADIP_word_sync, ADIP_ZERO_bit, ADIP_ONE_bit signal) in the ADIP data unit signal reproduced from the ADIP data unit. The ADIP_word_sync signal is a signal indicating synchronization (ADIP word break) with the ADIP word [(a)]. In this case, the first four wobbles of the ADIP data unit are wobbles that are 180 degrees out of phase with respect to the monotone wobble (negative_wobble), and the latter four wobbles are wobbles that are not out of phase (positive_wobble: positive). Phase wobble). The ADIP_ZERO_bit signal is a signal indicating that the ADIP bit data is “0” [(b)], and the ADIP_ONE_bit signal is a signal indicating that the ADIP bit data is “1” [(c ]]. In both cases, the first 4 wobbles of the ADIP data unit are (1 reverse phase + 3 normal phase) wobbles, but the latter 4 wobbles are (2 normal phase + 2 reverse phase) wobbles in the case of ADIP_ZERO_bit. On the other hand, in the case of ADIP_ONE_bit, it is a wobble (2 reverse phase + 2 normal phase). Any one of these three patterns of ADIP data units is formed for every 93 wobbles (in the case of ADIP_word_sync, it is formed for every 93 × 52 wobbles), and whether the first 4 wobbles are word sync or bit sync. In the case of bit sync, it is determined whether the ADIP bit data is “0” or “1” in the latter four wobbles. 2A to 2C also show signals obtained by binarizing the ADIP_word_sync, ADIP_ZERO_bit, and ADIP_ONE_bit signals.

  FIGS. 3A to 3C show binary signal changes in the ADIP_word_sync, ADIP_ZERO_bit, and ADIP_ONE_bit signals (high for reverse phase wobble and low for normal phase wobble), respectively. In any pattern, the signal of the first wobble is at a high level. FIG. 3D shows a synchronization shift detection signal generated by the synchronization shift detection signal generation circuit 11 of FIG. For any of the ADIP_word_sync, ADIP_ZERO_bit, and ADIP_ONE_bit signals, a synchronization shift detection signal is output 8 wobble clocks after the beginning (at the end of the ADIP data unit signal).

In FIG. 1, the signal reproduced from the optical disc 1 includes an ADIP data unit signal and a signal from a monotone wobble (hereinafter referred to as “wobble signal”) in an unrecorded disc, and recorded data in a recorded disc. , An ADIP data unit signal and a wobble signal are included. By passing such a signal through the band-pass filter 9, an ADIP data unit signal and a wobble signal are extracted. The ADIP data unit is composed of 8 wobbles, and the first wobble is 180 degrees out of phase with the monotone wobble. Therefore, it is easy to separate the ADIP data unit signal from the wobble signal. Then, ADIP data is generated by binarizing a wobble signal that is 180 degrees out of phase as a negative_wobble signal (High level) and a signal that is not shifted as a positive_wobble signal (Low level). Further, the address signal is decoded by the address detection circuit 10. The optical head position is detected by this address signal. Further, the synchronization error detection signal generation circuit 11 generates a synchronization error detection signal as described with reference to FIG. However, the synchronization error detection signal does not necessarily have to be generated as described above, and any signal can be used as long as it can be detected as a signal having a fixed period from the optical disk. It may be a wobble cycle signal.

  As the clock signal, the clock generation circuit 13 and the PLL circuit 14 generate a wobble clock and a recording channel clock from the ADIP data unit signal and the wobble signal. As described above, in the DVD + R / RW specification, 32 channel bits are recorded in one wobble period, so the recording channel clock is generated from the wobble clock as a clock having the 1/32 period.

If the recording is normally performed, the synchronization deviation detection signal has a cycle of 93 × 32 recording channel clock (93 wobbles) . Therefore, when the synchronization deviation detection signal is continuously detected, it is checked whether the synchronization deviation detection signal and the recording channel clock are synchronized with each other, thereby causing the recording start inappropriate state detection circuit 12 in FIG. Thus, it is possible to determine whether the recording is normally performed.

  Next, an operation for starting recording will be described. First, the optical head is jumped to the vicinity of the target address where recording is to be started. For that purpose, the disk synchronization at that position is drawn and the disk address is read, and when it is larger than the target address, the optical head is caused to jump to the inner circumference to the extent that it does not become smaller than the target address. When it is smaller than the target address, it is jumped slightly to the outer periphery so as not to exceed the target address. By repeating this, the optical head reaches the vicinity of the target address. When the optical head confirms the disk address having a certain difference from the target address in synchronization drawn from the groove of the optical disk, it receives an instruction to prepare for recording start, waits for the target address to reach while moving along the track along the disk groove, When it reaches, start recording. During these periods, a light beam having a constant intensity is irradiated from the optical head 3 of FIG. 1 to the optical disk 1, and the light beam reflected from the optical disk 1 is provided in the optical head 3 (not shown). )) And is reproduced as a reproduction signal by the reproduction circuit 7.

At this time, after the optical head receives the recording start preparation instruction, the synchronization shift detection signal is used as the recording channel clock during the entire period or a part of the period until the target address is reached (data recording start preparation period). It is checked whether it is detected inside a detection window having a certain width or detected outside. This detection window is formed with a certain width on the left and right of the recording channel clock every 93 × 32 recording channel clocks from the end of any one ADIP data unit signal during the data recording start preparation period, for example. Is done. This width indicates how much the synchronization deviation between the synchronization deviation detection signal and the recording channel clock is tolerated, and / or how much the error between the wobble clock and the recording channel clock generated by the PLL circuit is. Appropriately determined in consideration. This detection window is generated by the recording start inappropriate state detection circuit 12 using, for example, a counter (hereinafter referred to as “93 × 32 recording channel clock period counter”) that outputs every 93 × 32 recording channel clock. Can be made. Instead of using the recording channel clock, it is possible to use a wobble clock.

FIG. 4 and FIG. 5 illustrate how the determination of whether or not the recording start is appropriate is performed. The determination is based on whether the synchronization error detection signal is detected inside or outside the detection window, and is counted every time it is detected outside the detection window. In this case, it is determined that the start of recording is inappropriate. Here, the detection signal shift synchronization, recording start is unsuitable when it is detected four times outside the detection window. That is, the recording start inappropriate determination threshold is 4. In FIG. 4, the series of synchronization error detection signals detected during the data recording start preparation period and the detection window have the same period. Therefore, none of the synchronization error detection signals are outside the detection window. Not detected. Therefore, the number of detections outside the detection window is 0, and it is determined that it is appropriate to start recording at the recording start position of the target address. On the other hand, in FIG. 5, the phase relationship between the synchronization shift detection signal and the detection window gradually shifts, and when the number of detections outside the detection window reaches 4, the recording start is inappropriate, and the recording start is temporarily stopped. It is determined that it should be withdrawn.

  In recording in a normal stable state, the synchronization shift detection signal appears at a cycle of 93 × 32 recording channel clock. However, for some reason, this relationship can break down. For example, if a correct wobble signal cannot be obtained due to an abnormality in the disk rotation speed and / or scratches on the optical disk, a wobble clock obtained by inputting the wobble signal obtained from the optical disk to the PLL circuit, The recording channel clock is disturbed with respect to the wobble clock and recording channel clock which should be regular. Recording can be started correctly if it is pulled back so that this disturbance can be recovered before reaching the target address, but if the recording start position is reached in a disordered state or when the disorder is enlarged, recording starts. The position will shift. Further, if the wobble signal is drawn in a distorted state, recording starts in a shifted state, and recording is continued thereafter.

  Accordingly, as described above, the relationship between the synchronization error detection signal and the detection window is checked, and if the synchronization error detection signal is not detected within the detection window or is detected outside the detection window, the temporary error detection signal is temporarily detected. It is considered that synchronization has occurred. However, the synchronization error detection signal may not be detected within the detection window or may be detected outside the detection window due to a reproduction error during the above-described data recording start preparation period. When it is not detected within the detection window, or when the number of times detected outside the detection window is detected to be greater than or equal to a predetermined threshold, it is recognized that a real synchronization error has occurred.

  Further, instead of the detection window, the output from the above-mentioned 93 × 32 recording channel clock period counter can be used as it is. That is, the phase relationship between the synchronization deviation detection signal and the output from the 93 × 32 recording channel clock period counter is checked, and the predetermined synchronization deviation detection signal and 93 × are detected in a predetermined data recording start preparation period. When the number of times that the predetermined phase deviation range with the 32 recording channel clock period counter exceeds the predetermined threshold number of times, it can be considered that the synchronization deviation has occurred. Here, the phase relationship between the synchronization shift detection signal and the output from the 93 × 32 recording channel clock cycle counter is, for example, that the synchronization shift detection signal and the output from the 93 × 32 recording channel clock cycle counter appear simultaneously. The case where the phase shift is 0 degree, and the case where the appearance of the synchronization shift detection signal and the output from the 93 × 32 recording channel clock cycle counter is shifted by 1 wobble may be determined as a phase shift of 360 degrees. In other words, it may be determined by the time difference between the synchronization error detection signal and the output from the 93 × 32 recording channel clock period counter.

  In addition, a synchronization error and a disk defect can be detected by detecting an address abnormality. This is because when synchronization loss occurs or when the optical disk has a defect, the address cannot be detected normally and an address error may occur. Therefore, when the number of parity check errors at the time of address detection is greater than or equal to a predetermined threshold at a predetermined fixed number of address detections, or the number of times the detected address is different from the expected value In the case described above, it can be recognized that the recording start state is inappropriate.

  Furthermore, the number of times that the synchronization deviation detection signal is not detected within the window, the number of times the synchronization deviation detection signal is detected outside the window, the synchronization deviation detection signal, and the output from the 93 × 32 recording channel clock cycle counter are inherent. Even if the sum of two or more of the number of times the phase relationship is lost, the number of address parity errors, and the number of mismatches with the expected address exceeds the preset threshold, it is regarded as an inappropriate recording start state. Can do.

  If the above-mentioned recording start inappropriate state occurs, if recording is started as it is, the recording data starts to deviate from the position to be originally recorded on the optical disk, or it is uncertain whether it can be recorded from the correct position. It becomes a record in the state. Therefore, it is better to cancel the recording once in such a state.

  Next, since it was originally impossible to record, it must be recorded again. Therefore, in this case, the optical head is jumped to the inner or outer peripheral side of the optical disk, and the synchronization is re-drawn.

  The recording start condition at this time may be the same as the previous one. Also, if the problem is fixed to the optical disk, it can be considered that the same state will occur again. Therefore, it is possible to relax the above-mentioned inappropriate recording start condition and bring it in the direction to start recording. For example, the width of the above-described detection window can be increased. Of course, if the inappropriate condition for starting recording is masked, recording is performed.

Further, in the data recording start preparation period, a recording start determination area for determining whether to perform recording may be set with an interval from the recording start position. In this case, if it is not possible to determine the recording start inappropriate state in this recording start determination area, recording is performed even if it is determined that the recording inappropriate state is present between this area and the recording start position. If it is determined in this recording start determination area that the recording is in an inappropriate state, the recording start determination area is moved further away from the recording start position in the recording start operation again. If it is not determined that the recording is inappropriate, it is possible to determine that recording is to be performed.
Further, the above-described movement of the recording start determination area and relaxation of the inappropriate recording start condition may be combined. In this way, a more appropriate recording start can be realized.

In this embodiment, an optical disk recording apparatus of the present invention will be described for the DVD-R and DVD-RW specifications.
The same concept as the DVD + R and DVD + RW specifications in the first embodiment can be applied to the DVD-R and DVD-RW specifications. In the DVD-R and DVD-RW specifications, position information (address information) on an optical disc is stored in LPP (Land Pre Pit). LPP is an isolated pit formed on a land between wobbling grooves. By this groove wobbling and LPP, the recording channel clock and wobble clock generation, address information acquisition, optical disk rotation control, etc. are obtained as in the case of the groove wobbling and ADIP data unit in the first embodiment. Can do.

In the following, in the present embodiment, points different from the first embodiment will be described.
FIG. 6 schematically shows two sync frames (hereinafter simply referred to as “frames”) of a signal reproduced from an unrecorded disc. The horizontal axis is time. One frame is composed of 8 wobbles. The groove wobbling signal obtained from the groove is a sinusoidal signal. On the other hand, the LPP signal obtained from the LPP is located at the first three peaks of the groove wobbling signal in the frame and constitutes one set of 3 bits. The LPP signal appears in either an even frame or an odd frame every two frames. In FIG. 6, the LPP signal appears in the even frame. In FIG. 6, the groove is drawn in a straight line, but in actuality, it is wobbling.

  In the DVD-R and DVD-RW specifications, as described above, one frame is composed of 8 wobbles, but one sector is composed of 26 frames.

  As shown in FIGS. 7A to 7D, there are four patterns (SYNC EVEN, SYNC ODD, data 1 and data 0 signals) in the LPP signal. The SYNC EVEN signal is a signal indicating the first EVEN frame of the sector, and all 3 bits exist [(a)]. The LPP signal shown in FIG. 6 is a SYNC EVEN signal. The SYNC ODD signal is a signal indicating an ODD frame which is the second frame of the sector, and the first 2 bits exist, but the last 1 bit does not exist. The data 1 signal and the data 0 signal are signals indicating that the frame data is “1” and “0”, respectively, and there is no second bit, but the third bit is also included in the data 0 signal. not exist. In any of the four patterns, the first bit (sync bit) exists. The second bit determines whether it is a SYNC EVEN signal or SYNC ODD signal, a data 1 signal or a data 0 signal, and the last 1 bit determines whether it is a SYNC EVEN signal or a SYNC ODD signal, a data 1 signal or a data 0 signal. Determined.

  In the DVD-R and DVD-RW specifications, since 186 channel bits are recorded in one wobble, the recording channel clock is a clock having a 1/186 cycle of the wobble clock.

  As described above, one frame is composed of 8 wobbles, and one sector is composed of 26 frames. Since the LPP signal appears in either an even frame or an odd frame for every pair of two frames, if a synchronization shift detection signal is formed using this LPP signal, the synchronization shift detection signal is Detection is possible in units of 8 wobbles (ODD frame → EVEN frame), 16 wobbles (EVEN frame → EVEN frame, or ODD frame → ODD frame), or 24 wobbles (EVEN frame → ODD frame).

  FIG. 8 shows the relationship between the LPP signal and the synchronization shift detection signal used in this embodiment. Since there is a first bit in the four patterns of the LPP signal (SYNC EVEN, SYNC ODD, data 1 and data 0 signal), the bit can be used as a synchronization shift detection signal. That is, when any of the SYNC EVEN, SYNC ODD, data 1 and data 0 signals is detected, for example, a synchronization shift detection signal is output at the fall of the first bit signal. As described above, the interval of the synchronization deviation detection signal is 8 × 186 recording channel clock, 16 × 186 recording channel clock, or 24 × 186 recording channel clock, as described above. . Therefore, as in the first embodiment, a detection window having a certain width is formed for each 8 × 186 recording channel clock on the left and right sides of the recording channel clock, and the synchronization shift detection signal is provided outside the detection window. It is possible to determine whether or not recording is inappropriate depending on whether or not a predetermined number of thresholds is detected. Alternatively, if a detection window is formed for each 24 × 186 recording channel clock, it is possible to determine whether or not recording is inappropriate depending on whether or not the detection window is detected exceeding a predetermined threshold number. It is.

As described above, the differences between the present embodiment and the first embodiment have been described. Regarding the other points, if the ADIP data unit, ADIP bit, and ADIP word in the first embodiment are respectively associated with the LPP, the frame, and the sector, the viewpoint described in the first embodiment is also applied to the present embodiment. Almost entirely true.
In Patent Document 1, the detection timing is obtained for each physical ID, that is, for each sector. However, in the present invention, a synchronization deviation detection signal can be obtained in fine units such as a frame, and a recording start inappropriate state can be obtained quickly and accurately. Can be detected.

1 is a block diagram of an optical disc recording apparatus according to the present invention. FIG. 3 is a waveform diagram of an ADIP data unit signal according to Embodiment 1 of the present invention. FIG. 3 is a waveform diagram showing a relationship between an ADIP data unit signal and a synchronization shift detection signal according to Embodiment 1 of the present invention. FIG. 4 is a waveform diagram showing a relationship between a synchronization shift detection signal determined to be appropriate for recording start and a detection window according to Embodiment 1 of the present invention. FIG. 6 is a waveform diagram showing a relationship between a synchronization shift detection signal determined to be inappropriate for recording start and a detection window according to Embodiment 1 of the present invention. The wave form diagram of the LPP signal and groove wobbling signal which concern on Example 2 of this invention. The wave form diagram of the four patterns of the LPP signal which concerns on Example 2 of this invention. FIG. 6 is a waveform diagram showing a relationship between an LPP signal and a synchronization shift detection signal according to Embodiment 2 of the present invention. The wave form of the wobbling signal of various specifications of DVD.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk 2 Motor 3 Optical head 4 Control circuit 5 Recording start condition judgment circuit 6 Write gate generation circuit 7 Playback circuit 8 Internal synchronization circuit 9 Band pass filter 10 Address detection circuit 11 Synchronization deviation detection signal generation circuit 12 Recording start inappropriate state Detection circuit 13 Clock generation circuit 14 PLL circuit

Claims (16)

Means for irradiating a light beam onto an optical disc on which a wobbling data recording track is formed and an address information source embodying address information is pre-formatted to obtain an address signal from the address information source; and the wobbling data recording Means for generating a clock signal using a signal obtained from a recording track, and detects a synchronization shift between the clock signal and a signal obtained at a fixed period from a wobble signal or the address signal. An optical disc recording apparatus further comprising means for generating a synchronization deviation detection signal for determining whether or not recording is started on the optical disc using the synchronization deviation detection signal. When data recording is started from an arbitrary target position on the optical disc, a synchronization deviation between the synchronization deviation detection signal and the clock signal is out of a predetermined range during a predetermined data recording start preparation period. 2. The optical disc recording apparatus according to claim 1, wherein the start of the recording at the target position is once canceled when the number of occurrences of the out-of-synchronization state reaches a number equal to or greater than a predetermined threshold value. . The clock signal is a wobble clock signal generated based on a signal obtained from the wobbling data recording track or a recording channel clock signal generated using the wobble clock signal. Item 3. The optical disk recording device according to Item 1 or 2. The synchronization error state is a state in which a time difference between the synchronization error detection signal and a periodic output from the counter counted by the clock signal is outside a predetermined range. The optical disk recording apparatus according to claim 2 or 3. 4. The out-of-sync state is a state in which the out-of-sync detection signal is not detected within a window having a predetermined time width before and after the timing defined by the clock. 2. An optical disk recording apparatus according to 1. 3. The out-of-sync state is a state in which the out-of-sync detection signal is detected outside a window having a predetermined time width before and after the timing defined by the clock. 4. The optical disk recording apparatus according to 3. A means for obtaining an address signal from the address information source by irradiating a light beam onto an optical disc in which a wobbling data recording track is formed and an address information source embodying address information is preformatted; An optical disc recording apparatus comprising: means for demodulating address information; and means for generating a clock signal using a signal obtained from the wobbling data recording track, wherein the address information is used to write to the optical disc. An optical disc recording apparatus for determining whether recording is appropriate or not. When data recording is started from an arbitrary target position on the optical disc, the number of occurrences of the abnormal state of the demodulated address information exceeds a predetermined threshold during a predetermined data recording start preparation period. 8. The optical disk recording apparatus according to claim 7, wherein, when the number of times has been reached, even if the light beam reaches the target position, the start of the recording is once canceled. 9. The optical disk recording apparatus according to claim 8, wherein the abnormal state of the address information is an error in parity in the demodulated address information. 9. The optical disc recording apparatus according to claim 8, wherein the abnormal state of the address information is a mismatch state between an address in the demodulated address information and an expected value of the address. 11. The optical disc recording apparatus according to claim 1, wherein the address information source is formed by modulating a part of the wobbling data recording track with the address information. 11. The optical disc recording apparatus according to claim 1, wherein the address information source is preformatted as pits formed on the optical disc. When starting recording data from an arbitrary target position on the optical disc, a recording start determination is performed to determine whether to start the recording adjacent to the target position or at intervals. 13. The optical disk recording apparatus according to claim 2, wherein an area is provided. 14. The optical disc recording apparatus according to claim 2, wherein after the start of the recording is once canceled, the appropriate / inappropriate determination of the start of the recording is performed again. When the appropriate / inappropriate determination of the start of recording is performed again, a predetermined range of the synchronization deviation between the synchronization deviation detection signal and the clock signal or a predetermined threshold number is relaxed. 15. The optical disc recording apparatus according to claim 14, wherein a predetermined threshold number of times of occurrence of the abnormal state of the demodulated address information is relaxed. 16. The optical disk recording apparatus according to claim 14, wherein the recording start determination area is changed when the appropriate / inappropriate determination of the start of recording is performed again.

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