JP2001243698A - Recording control method of optical disk, recording/ reproducing device optical disk, and optical disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem at the time of recording the real time data that a recording rate is lowered than the original value or recording data are interrupted at the worst, when the many recording errors are generated due to the defect on a disk such as scratch or fingerprint. SOLUTION: This method is constituted to provide the step to request the buffer revision for prompting the revision of the storage by depending on the data storage amount of a buffer memory for the temporary storage of the recording/reproducing data, the step to change the recording area for requesting the recording on the other recording areas from the present recording area when the revision of buffer is requested from the above step to request the buffer revision, and the step to request the correction of an input rate for requesting the change of the future input rate of the recording data from the present recording rate and the size of the expected recording area when the buffer revision is requested by the step to request the buffer revision or when the recording area is changed by the above step to change the recording area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audiovisual
The present invention relates to an optical disk recording control method for recording and reproducing data in real time, and an optical disk recording and reproducing apparatus.

[0002]

2. Description of the Related Art An optical disk for recording and reproducing data by condensing light emitted from a semiconductor laser into a minute spot of 1 micron or less on a recording surface of a medium is a conventional tape medium as a high-density and large-capacity recording medium. It has the characteristic that it is excellent in random access property as compared with. Also,
Non-contact recording and reproduction using laser light is possible, so there is little deterioration due to repeated use, and mastering by the disc manufacturer enables mass copying at a low cost. As audio, CDs have become commonplace in place of conventional analog recording records.

Further, in recent years, DVDs in which high-quality image data are digitally recorded are commercialized, and it is expected that optical discs as digital recording media for AV data will further develop in the future.

On the other hand, not only read-only optical disks such as CDs and DVDs in which data is recorded in advance in the form of pre-pits by disk manufacturers, but also record-type optical disks in which users can record AV data at home in recent years,
For example, a DVD-RAM or the like has been developed and is used for recording and reproduction of a television broadcast, and is used as a new product to replace a conventional VHS or other video tape recorder.
The development of optical disk video recorders and the like is currently underway.

[0005] In an optical disk characterized by non-contact and high-density recording as described above, a tracking control technique for stably causing a laser beam to follow a track or a land provided in advance on a medium or a method for forming a minute spot. Focus control technology and laser power control technology for realizing a constant output power are indispensable, and these control technologies require increasingly precise control as the density of optical discs increases. By performing a system-based recovery process using these control technologies, stable recording and reproduction of the optical disk are realized.

[0006]

However, under the situation where the above-described recovery processing is executed, there is a problem that the recording rate is lower than the original value. For example, if the recording target position cannot be detected due to a defect on the disk such as a scratch or a fingerprint, the optical head is moved to the inner peripheral side to try to detect the next recording position. Therefore, the time from the actual recording request to the completion of the recording is extended, and the actual recording rate is lower than the expected recording rate.

For this reason, when such a recovery process is performed when recording real-time data such as a television broadcast, there is a problem that the recorded data is interrupted at the worst during the execution of the process. Further, in order to avoid the problem that the recording is interrupted, there is a problem that it is necessary to add a large-capacity semiconductor memory for temporarily storing the recording data being processed.

An object of the present invention is to provide an optical disk recording control method and an optical disk recording / reproducing apparatus when real-time data is recorded by adding a small-capacity semiconductor memory in view of the above-mentioned problems.

[0009]

According to the present invention, there is provided a recording control method for an optical disk, comprising the steps of: a buffer correction requesting step for prompting correction of storage depending on an amount of data stored in a memory for temporarily storing recording / reproducing data; When a buffer correction is requested from, a recording area change step for requesting recording from the current recording area to another recording area, and when a buffer correction is requested from the buffer correction request step or the recording area change step When the recording area is changed, an input rate correction requesting step for requesting a change of the input rate of the recording data in the future based on the current recording rate and the size of the scheduled recording area is provided.

An optical disk recording / reproducing apparatus according to the present invention comprises: a memory means for temporarily storing AV data to be recorded or reproduced; a recording / reproducing means for recording / reproducing AV data to / from the optical disc; Buffer correction requesting means for accelerating accumulation correction, recording area changing means for changing the recording from the current recording area to another recording area when the buffer correction requesting means requests the buffer correction, and the buffer correction requesting means When a buffer correction is requested from the user or when the recording area is changed by the recording area changing means, an input rate correction requesting a change in the input rate of future recording data based on the current recording rate and the size of the planned recording area. Request means.

[0011]

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

FIG. 8 is a configuration diagram of an optical disk according to an embodiment of the present invention. In FIG. 8, reference numeral 801 denotes a data area in which AV data is recorded; 802, a control track in which disc management information is recorded; and a lead-in area including a test area 804 for executing temperature correction.

In the optical disk configured as described above,
AV data such as TV broadcast is recorded in the data area 801. In an optical disk characterized by random access, one program may be recorded in a plurality of areas as a result of repeated recording and erasing. In FIG. 8, for example, 8
This shows a state in which one program is recorded in three areas 03a, 803b, and 803c. The recording data is first recorded in 803a, and after the execution of the seek,
In the form of an area 803c, seek and recording are repeated, and one continuous piece of AV data is dispersedly recorded in a plurality of areas. The recording data at the time of performing the seek is temporarily stored in the semiconductor memory, and is recorded in the recording area after the completion of the seek.

FIG. 9 is a buffer model showing the amount of recording data temporarily stored in the semiconductor memory when recording the recording data a, b, and c in the areas 803a, 803b, and 803c. In FIG. 9, the horizontal axis is time, and the vertical axis is the data storage amount at that time.

(Recording 901) First, recording data a is recorded. At this time, since the data is recorded at a rate equal to or higher than the input rate of the recording data, the amount of accumulated data is reduced, and the data is recorded on the disc immediately after the data is input.

(Seek period 902) After recording the recording data a, a seek is executed for recording the recording data b. During this time, since data cannot be recorded on the disc, all of the input recording data is temporarily stored in the memory, and the recording data storage amount increases.

(Recording 903) Next, after reaching the area 803b for recording the recording data b, the recording data b including the data accumulated during the seek period 902 is recorded. At this time,
Since data is recorded at a rate higher than the recording data input rate,
The data storage amount decreases, and after the storage amount becomes close to zero, data is recorded on the disk as soon as data is input.

(Seek period 904) Like the seek period 902, a seek is performed to record the recording data c. During this time, since data cannot be recorded on the disc, all of the input recording data is temporarily stored in the memory, and the recording data storage amount increases.

(Recording 905) As in the case of the recording 903, the recording data c including the data accumulated during the seek period 904 is recorded. At this time, since the data is recorded at the recording data input rate or higher, the data storage amount decreases, and after the storage amount becomes close to zero, the data is immediately recorded on the disk when the data is input.

As described above, when the seek and the recording are simply repeated, the recording data during the seek can be temporarily saved by providing a semiconductor memory having a data amount larger than the maximum amount of data input during the maximum seek time, and the AV data is interrupted. Without the need for continuous recording in real time.

In FIG. 9, the minimum required maximum value is A
For example, when the maximum seek time is 1 second and the data input rate is 10 Mbps, A becomes 10 Mbit,
Data can be recorded by using a semiconductor memory larger than this.

FIG. 10 is a buffer model showing a conventional example in which the actual recording rate decreases and recording data is accumulated in the buffer during the recording shown in FIG. In the conventional control method, data is discarded by overwriting data in order not to stop real-time data input. For this reason, at the time of reproduction, image skipping of the discarded data occurs. In FIG. 10, the horizontal axis is time, and the vertical axis is the data storage amount at that time.

(Recording 1001) First, recording data a is recorded. At this time, since the data is recorded at a rate equal to or higher than the input rate of the recording data, the amount of accumulated data is reduced, and the data is recorded on the disc immediately after the data is input.

(Seek period 1002) After recording the recording data a, a seek is performed to record the recording data b.
During this time, data cannot be recorded on the disc,
All the input recording data is temporarily stored in the memory, and the recording data storage amount increases. When the seek is completed, the accumulated amount reaches the maximum value A in FIG.

(Recording 1003) Next, after reaching the recording data b recording area, the recording data b is recorded including the data accumulated during the seek period 1002. At this time, if the data is recorded in the recording stable area 1007, the data is recorded at the recording data input rate or higher, so that the data accumulation amount decreases, and data is input after the accumulation amount becomes close to zero. Is immediately recorded on the disc. However,
Unstable recording area 100 where errors frequently occur during recording
If the recording rate is lower than the input rate when recording at 8, the data storage amount gradually increases.

(Seek period 1004) Seek period 100
Similar to 2, the seek is executed for recording the recording data c. During this time, since data cannot be recorded on the disc, all of the input recording data is temporarily stored in the memory, and the recording data storage amount increases. In this case, if the accumulated amount exceeds the maximum memory capacity, data input during the buffer overflow period 1006 (time until the next recording starts) overwrites unrecorded data in the memory.

(Recording 1005) As in the case of the recording 1001, the recording data c is recorded including the decrease in the recording rate and the data accumulated during the seek period 1004. At this time, since the data is recorded at the recording data input rate or higher, the data storage amount decreases, and after the storage amount becomes close to zero, the data is immediately recorded on the disk when the data is input.

As described above, if the actual recording rate is lower than the input rate due to the occurrence of an error during recording, a buffer overflow may occur depending on the size of the unstable recording area and the presence or absence of a seek. In order to prevent this, unrecorded data must be discarded.

(Embodiment 1) FIG. 2 shows an embodiment of the present invention in the case where the actual recording rate is reduced and recording data is accumulated in a buffer during the recording shown in FIG. 9 is a buffer model showing the first mode of the present invention. According to the input rate control method of the present embodiment, when the recording data stored in the buffer memory is equal to or larger than a predetermined capacity, the input rate of the recording data is made equal to the actual recording rate, thereby increasing the buffer storage amount. It is characterized in that it is controlled so as not to exist. In FIG. 2, the horizontal axis is time, and the vertical axis is the data storage amount at that time.

(Recording 201) First, recording data a is recorded. At this time, since the data is recorded at a rate equal to or higher than the input rate of the recording data, the amount of accumulated data is reduced, and the data is recorded on the disc immediately after the data is input.

(Seek Period 202) After the recording of the recording data a, a seek is performed to record the recording data b. During this time, since data cannot be recorded on the disc, all of the input recording data is temporarily stored in the memory, and the recording data storage amount increases. When the seek is completed, the accumulated amount reaches the maximum value A in FIG.

(Recording 203) Next, after reaching the recording data b recording area, the recording data b including the data accumulated during the seek period 202 is recorded. At this time, if the data is recorded in the recording stable area 207, the data is recorded at an input rate of the recording data or higher, so that the data storage amount decreases, and after the storage amount becomes close to 0, data is input. Is immediately recorded on the disc. However, if the recording rate is lower than the input rate when recording in the unstable recording area 208 where errors frequently occur during recording,
The data storage amount gradually increases.

(Input Rate Request 204) When the amount of data storage reaches the limit for seeking due to a decrease in the actual recording rate, correction of buffer storage is required. In response to this request, a request is made to change the recording data input rate to a rate equal to the current actual recording rate. When the input rate becomes equal to the recording rate, the increase in the amount of stored data stops.

(Seek period 205) As in the case of 202, a seek is executed for recording the recording data c. During this time,
Since data cannot be recorded on a disc, all the input recording data is temporarily stored in the memory, and the recording data storage amount increases. In FIG. 2, the storage amount reaches the maximum memory capacity.

(Recording 206) As in the case of the recording 203, the recording data c including the data accumulated during the seek period 205 is recorded. At this time, since the data is recorded at the recording data input rate or higher, the data storage amount decreases, and after the storage amount becomes close to zero, the data is immediately recorded on the disk when the data is input.

As described above, in the present embodiment, when the recording data storage amount reaches the seekable limit, the input rate of the recording data is set equal to the actual recording rate. There is no. For this reason, the overflow of the buffer memory can be suppressed,
It is possible to guarantee stable recording without stopping real-time data input. The seek limit is set regardless of where the seek occurs after this point.
This means a point in time at which a buffer size capable of reliably storing data input during the seek period can be secured, and is calculated and defined by (maximum buffer memory capacity) − (maximum time required for seek) × (input data rate).

(Embodiment 2) FIG. 1 shows an embodiment of the present invention in a case where the actual recording rate is reduced and recording data is accumulated in a buffer during the recording shown in FIG. 9 as in FIG. 14 is a buffer model showing the second embodiment. In the recording area change control method according to the present embodiment, when the recording data stored in the buffer memory transitions in the increasing direction during recording,
By changing the recording destination to an area where stable recording is possible, data accumulation in the buffer is eliminated. In FIG. 1, the horizontal axis is time, and the vertical axis is the data storage amount at that time.

(Recording 101) First, recording data a is recorded. At this time, since the data is recorded at a rate equal to or higher than the input rate of the recording data, the amount of accumulated data is reduced, and the data is recorded on the disc immediately after the data is input.

(Seek period 102) After the recording of the recording data a, a seek is performed for recording the recording data b. During this time, since data cannot be recorded on the disc, all of the input recording data is temporarily stored in the memory, and the recording data storage amount increases. When the seek is completed, the accumulated amount reaches the maximum value A in FIG.

(Recording 103) Next, after reaching the area where the recording data b is recorded, the recording data b including the data accumulated in the seek period 102 is recorded. At this time, if the data is recorded in the recording stable area 107, the data is recorded at the recording data input rate or higher, so that the data accumulation amount decreases, and after the accumulation amount becomes close to 0, the data is input. Is immediately recorded on the disc. However, if the recording rate is lower than the input rate when recording in the unstable recording area 108 where errors frequently occur during recording,
The data storage amount gradually increases.

(Recording Area Change Request 104) When the data storage amount starts to increase due to a decrease in the actual recording rate, correction of buffer storage is required. In response to this request, it is required to change the recording area to an area where stable recording is possible.

(Seek period 105) A seek is performed to change the recording area. During this time, since data cannot be recorded on the disc, all of the input recording data is temporarily stored in the memory, and the recording data storage amount increases. Determine whether recording is possible at the seek completion destination,
A seek is performed in search of a stable recording area.

(Recording 106) As in the case of the recording 103, the recording data b including the data accumulated during the seek period 105,
Record c. At this time, since the data is recorded at the recording data input rate or higher, the data storage amount decreases, and after the storage amount becomes close to zero, the data is immediately recorded on the disk when the data is input.

As described above, in the present embodiment, data recording is shifted to a stable recording area in which the original recording rate is guaranteed in response to an increase in the amount of storage due to a decrease in the actual recording rate. For this reason, the overflow of the buffer memory can be suppressed, and stable recording can be guaranteed without stopping real-time data input. It should be noted that the determination of the data accumulation amount increasing tendency is, for example, M
It is determined based on whether or not the increase of the stored data is 1 GOP or more in the time unit corresponding to 1 GOP unit of the PEG-compressed recording data from the previous time.

(Embodiment 3) FIG. 3 shows an embodiment of the present invention in a case where the actual recording rate is reduced and recording data is accumulated in a buffer during the recording shown in FIG. 9 as in FIG. 15 is a buffer model showing a third embodiment. This embodiment is characterized in that, in addition to the third embodiment of the present invention, recording is performed with the allocation as originally planned even after the recording area is changed by lowering the input rate. In FIG. 3, the horizontal axis is time, and the vertical axis is the data storage amount at that time.

(Recording 301) First, recording data a is recorded. At this time, since the data is recorded at a rate equal to or higher than the input rate of the recording data, the amount of accumulated data is reduced, and the data is recorded on the disc immediately after the data is input.

(Seek period 302) After the recording of the recording data a, a seek is performed to record the recording data b. During this time, since data cannot be recorded on the disc, all of the input recording data is temporarily stored in the memory, and the recording data storage amount increases. When the seek is completed, the accumulated amount reaches the maximum value A in FIG.

(Recording 303) Next, after reaching the area for recording the recording data b, the recording data b including the data accumulated during the seek period 302 is recorded. At this time, if the data is recorded in the recording stable area 308, the data is recorded at the recording data input rate or higher, so that the data storage amount decreases, and after the storage amount becomes close to 0, the data is input. Is immediately recorded on the disc. However, if the recording rate is lower than the input rate when recording in the unstable recording area 309 where errors frequently occur during recording,
The data storage amount gradually increases.

(Recording area change request 304) When the amount of data storage starts to increase due to a decrease in the actual recording rate, correction of buffer storage is required. In response to this request, it is required to change the recording area to an area where stable recording is possible.

(Seek period 305) A seek is performed to change the recording area. During this time, since data cannot be recorded on the disc, all of the input recording data is temporarily stored in the memory, and the recording data storage amount increases. Determine whether recording is possible at the seek completion destination,
A seek is performed in search of a stable recording area.

(Recording 306) As in the case of the recording 303, the recording data b including the data accumulated during the seek period 305,
Record c. At this time, since the data is recorded at the recording data input rate or higher, the data storage amount decreases, and after the storage amount becomes close to zero, the data is immediately recorded on the disk when the data is input.

(Input rate correction request 307) In the recording area allocated at the start of recording, the seek period 305
Thus, a discard recording area 310 exists. In this case, in order to execute the recording of all data while keeping the initial allocation, the input rate is corrected to compensate for the data amount equal to the discarded size.

As described above, in this embodiment, in addition to the second embodiment, it is possible to protect the initial allocation.

The input rate corrected in FIG. 3 is as follows, where R is the remaining allocation capacity after a seek period 305 to a stable recording area, D is the capacity of the discarded recording area 310, and V is the input data rate. (RD) / RXV.

FIG. 4 shows Embodiment 1 of the present invention described above.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of an embodiment of an optical disc recording / reproducing apparatus which realizes stable recording without stopping a few real-time data inputs.

In the optical disk recording / reproducing apparatus shown in FIG.
A buffer correction requesting means is provided based on the amount of data stored in the buffer memory at the time of recording and the predetermined storable amount prior to recording.

In FIG. 4, reference numeral 401 denotes an optical disk;
Reference numeral 2 denotes an optical head composed of a semiconductor laser and an optical element; 403, a recording / reproduction control circuit for performing laser control and binarization of a reproduction signal; A modulation / demodulation circuit for demodulation; 405, an error detection and correction circuit for performing error detection and correction processing of errors caused by scratches, dust, etc. on the medium; 406, a work RAM for working the error detection and correction circuit 405;
Is a buffer RAM used as a data buffer for recording data or reproduction data, 407 is a buffer control circuit for controlling recording and reproduction of the buffer RAM, 409 is an MPEG encoding / decoding circuit for compressing / expanding digital AV data, and 410 is a TV broadcast. A tuner / AD / DA circuit 411 for converting received and digitized or decompressed AV data into analog to generate a video or audio signal is a control CPU 411 for controlling the entire optical disk recording / reproducing apparatus.

In the optical disk recording / reproducing apparatus configured as described above, when data is recorded, an antenna input such as a TV broadcast is input to the tuner / AD / DA circuit 410, and MPEG data is converted into digital AV data. Sign /
The signal is input to the decoding circuit 409. The MPEG encoding / decoding circuit 409 encodes the input data by MPEG and stores it in the buffer RAM 408 via the buffer control circuit 407. At the time of recording, the buffer RAM 408 is used as a temporary save memory for recording data during a period during which recording on the optical disk 401 cannot be actually performed due to a seek between recording areas or occurrence of an error during recording. The recording data stored in the buffer RAM 408 is sent to the error detection / correction circuit 405, subjected to error detection / correction coding, and sent to the modulation / demodulation circuit 404 as encoded data. The modulation / demodulation circuit 404 is 8/1
Recording / reproduction control circuit 403 which performs digital modulation such as 0 modulation
To send to. The recording / reproduction control circuit 403 performs power modulation of the semiconductor laser based on the modulation data, and records data on the optical disc 401.

The overall control of the recording is performed by the control CPU 411.
Is controlled by In the optical disk recording / reproducing apparatus according to the embodiment of the present invention configured as described above, stable recording control is controlled by the control CPU 411.

In the buffer correction requesting step 412, the recording data storage amount of the buffer RAM 408 is monitored, and when a predetermined data storage amount is detected, it is transmitted to the MPEG code / demodulation circuit 409 through the input rate correction requesting means 413 and the input rate Make changes. Further, in order to ensure stable recording, the recording / reproduction control unit 415 executes actual recording through the recording area change request unit 414.

FIGS. 5 and 6 are flowcharts for explaining the operation of the control CPU 411 in more detail.

FIG. 5 is a flowchart in the case where the input data rate correction requesting step responds to the buffer correction requesting step when recording AV data. In FIG. 5, (501) it is determined whether there is AV data to be recorded.

(504) If there is no data to be recorded, the recording is terminated.

(502) If there is data to be recorded, it is determined whether a buffer correction request has been issued from the buffer correction request means 412.

(503) If the buffer correction request has not been issued, AV data recording is continuously executed.

(505) If a buffer correction request has been issued, the current actual recording rate is calculated.

(506) When the calculation of the rate is completed at 505, the input rate correction requesting means 413 is notified and the input rate is corrected. As a result, 505 is stored in the buffer RAM 408 from the MPEG encoding / decoding circuit 409.
The recording data is transmitted at the rate calculated in step (1).

FIG. 6 is a flowchart in the case where a buffer area correction request step at the time of recording AV data is responded to by a recording area change request step. In FIG. 6, (601) it is determined whether or not there is AV data to be recorded.

(608) If there is no data to be recorded, the recording ends.

(602) If there is data to be recorded, it is determined whether or not a buffer correction request has been issued from the buffer correction request means 412.

(603) If the buffer correction request has not been issued, AV data recording is continuously executed.

(604) If a buffer correction request has been issued, the request is sent to the recording area change request means 414 to change the recording area.

(605) After the seek for changing the recording area is completed, it is determined whether or not stable recording is possible. If not, the recording area change requesting means 414 is notified to change the recording area.

(606) With the change of the recording area, the capacity of the discarded recording area is calculated.

(607) The input rate for completing the recording of the initially planned size is calculated from the discard capacity and the allocating remaining capacity calculated in 606, and is notified to the input rate correction requesting means 413 to correct the input rate. Execute As a result, the MPEG encoding / decoding circuit 409 sends the buffer R
The recording data is sent to the AM 408 at the calculated rate.

(Embodiment 4) FIG. 7 is a fourth embodiment of the present invention showing a recording area actually allocated to a recording area allocated before recording AV data. The present embodiment is characterized in that the recording arrangement is such that a recording defective area due to a defect is skipped with respect to a recording area allocated before recording. In FIG. 7, (701) a 704 recording area a, a 705 recording area b, and a 706 recording area c are allocated as areas to be recorded before recording.

(702) After recording the AV data in the 704 recording area a (707 recorded area a), the recording is interrupted because the recording in the 705 recording area b is unstable, and the next allocated area 706 is recorded in the recording area c. Make a record.

(703) After the recording of the AV data is completed,
8 recorded area a and 709 recorded area b are recorded in the medium management information area assuming that the AV data is arranged on the medium.

As described above, in the embodiment of the present invention,
With respect to the original recording allocation area, the data arrangement recorded with the recording failure area skipped is registered.

As described above, according to the optical disk recording / reproducing apparatus of the embodiment of the present invention, the input rate is corrected by increasing the amount of data stored in the buffer memory due to the decrease in the actual recording rate during recording. Alternatively, by changing the recording area, buffer overflow can be suppressed, and real-time data can be stably recorded.

[0081]

As described above, according to the present invention, there is provided a buffer correction requesting step for prompting the correction of the accumulation depending on the amount of data stored in the buffer memory for temporarily storing recording / reproducing data, and requesting the buffer correction from the buffer correction requesting step. A recording area change step of requesting recording from the current recording area to another recording area, and a recording area being changed when a buffer correction is requested from the buffer correction request step or by the recording area change step. In this case, by providing an input rate correction requesting step for requesting a change of the input rate of future recording data from the current recording rate and the size of the recording area, the overflow of the buffer memory can be suppressed, and Can ensure stable recording without stopping data input. .

[Brief description of the drawings]

FIG. 1 is a diagram showing a buffer model when a recording area is changed according to a second embodiment of the present invention;

FIG. 2 is a diagram illustrating a buffer model when an input rate is changed according to the first embodiment of the present invention;

FIG. 3 is a diagram showing a buffer model when a recording area is changed and an input rate is changed according to a third embodiment of the present invention;

FIG. 4 is a configuration diagram of an optical disc recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 5 is a flowchart at the time of recording according to the first embodiment;

FIG. 6 is a flowchart at the time of recording according to the third embodiment.

FIG. 7 is a diagram showing a medium model showing an allocated area before recording and an actual data arrangement after recording according to a fourth embodiment of the present invention.

FIG. 8 is a configuration diagram of a recordable optical disk.

FIG. 9 is a diagram illustrating a buffer model during recording.

FIG. 10 is a diagram showing a conventional buffer model when data storage increases due to a decrease in recording rate.

[Explanation of symbols]

 101, 103, 106 recording 102, 105 seek period 104 recording area change request 107 recording stable area 108 recording unstable area

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshitoshi Goto 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F-term (reference) 5D044 AB06 AB07 BC02 BC06 CC04 DE62 EF03 HH05 HH17 HL07 5D090 AA01 BB04 CC01 CC16 DD03 DD05 EE01 FF30 FF31 FF36 HH01 LL08

Claims (13)

[Claims] 1. A recording control method for an optical disk for digitally recording AV data, comprising: a buffer correction requesting step for prompting correction of storage depending on a data storage amount of a memory for temporarily storing recording / reproduction data; When a buffer correction is requested from the step, a recording area change step of requesting recording from the current recording area to another recording area, and when a buffer correction is requested from the buffer correction request step or the recording area change step When the recording area is changed, the input rate correction requesting step for requesting a change in the input rate of the recording data in the future based on the current recording rate and the size of the recording scheduled area. Method. 2. The optical disk recording according to claim 1, wherein the buffer correction requesting step prompts correction of the data storage state of the buffer by detecting that the data storage amount has reached a seekable limit. Control method. 3. The optical disk recording control method according to claim 1, wherein the buffer correction requesting step prompts correction of the data storage state of the buffer by detecting that the data storage amount is increasing. . 4. The optical disk recording control according to claim 1, wherein the recording area change request step discards an area currently being recorded and prompts a seek to an area that can be stably recorded. Method. 5. The recording of an optical disk according to claim 1, wherein the input rate correction requesting step calculates a current actual recording rate and prompts a change of the recording data input rate to the actual recording rate. Control method. 6. The input rate correction requesting step includes, without changing the size of the recording area without changing the size of the recording area, based on the size of the recording area and the size of the recording area discarded in the recording area change requesting step. 2. The recording control method for an optical disk according to claim 1, wherein a recording input rate at which recording can be completed is calculated, and a change to the recording input rate is prompted. 7. An optical disk recording / reproducing apparatus for digitally recording AV data, wherein the recording / reproducing AV is performed.
Memory means for temporarily storing data, recording / reproducing means for recording / reproducing AV data on / from the optical disk, buffer correction request means for encouraging the correction of the accumulation depending on the amount of data stored in the memory, and buffering from the buffer correction request means A recording area changing means for changing the recording from the current recording area to another recording area when correction is requested, and a recording area when the buffer correction is requested from the buffer correction request means or by the recording area changing means. Is changed,
An optical disc recording / reproducing apparatus comprising: an input rate correction requesting unit for requesting a change of an input rate of recording data in the future based on a current recording rate and a size of a recording scheduled area. 8. The optical disk recording / reproducing apparatus according to claim 7, wherein said buffer correction request means prompts correction of the data storage state of the buffer by detecting that the data storage amount has reached a seekable limit. apparatus. 9. The apparatus according to claim 7, wherein said buffer correction request unit prompts correction of the data storage state of the buffer by detecting that the data storage amount is increasing.
An optical disk recording / reproducing apparatus according to claim 1. 10. The optical disk recording / reproducing apparatus according to claim 7, wherein the recording area change request unit discards the area currently being recorded and urges seeking to a stable recordable area. . 11. The optical disk recording / reproducing apparatus according to claim 7, wherein said input rate correction requesting means calculates a current actual recording rate and prompts to change the recording data input rate to the actual recording rate. apparatus. 12. The input rate correction requesting means, without changing the size of the scheduled recording area, without changing the size of the scheduled recording area based on the size of the recording area and the size of the scheduled recording area whose recording has been discarded by the recording area change requesting means. 8. The optical disk recording / reproducing apparatus according to claim 7, wherein a recording input rate at which recording can be completed is calculated, and a change to the rate is prompted. 13. The recording apparatus according to claim 1, wherein, after recording the AV data, recording is performed on an area on the medium allocated for recording the AV data so as to avoid defects on the medium such as scratches and fingerprints. Optical disc to do.