JP4853547B2 - Recording apparatus and recording method - Google Patents

Description

The present invention relates to a recording method and apparatus for a write-once optical disc in which data can be recorded only once in an unrecorded area, but once written data cannot be erased and rewritten.

Hitherto, high-density and large-capacity read-only optical discs have been developed. In particular, DVD-ROM (Digital Versatile Disc-Read) containing video and audio data.
Only memory is widely used because high-quality video can be played back by an inexpensive playback-only DVD player.

On the other hand, in recent years, a write-once optical disc, for example, a DVD-R (DVD-Recorder) in which data can be recorded only once but data once written cannot be erased and rewritten.
ble) have been developed, and video recorders and video cameras have been commercialized as devices for recording data on a write-once optical disc. This write-once optical disc can be added to data with a time interval, and can be made a read-only disc that cannot be recorded any more after the finalization process that completes the additional write. It is.
Also, by recording video data in the DVD video format, a playback-only DV
It can also be played back by a D player.

In order to reproduce such a write-once optical disc with a DVD player, the final data and data structure must be compatible with the read-only optical disc.
However, since a write-once optical disc cannot be rewritten, a recording management area for managing the recording state of the disc is provided outside the data structure of the read-only optical disc, for example, on the inner circumference side. In other words, in the state before finalization processing that can be additionally recorded, the recording state of the disc such as the recording position of user data is sequentially recorded in the recording management area, and the data is used at the time of finalization processing to use the lead-in area and lead-out area. By creating and recording the data in the area, the same data and data structure as the read-only optical disc can be obtained and compatibility can be ensured.

Hereinafter, it will be described in more detail with reference to the drawings. FIG. 2 is an area structure diagram of a write-once optical disc.

The disc is divided into a disc recording management area 201, a lead-in area 202, a user data recording area 203, and a lead-out area 204 in order from the innermost circumference which is the head of the disc. In the disc recording management area 201, disc recording management information including position information indicating the reference of the final address of the recorded user data and disc recording information such as a recording in-progress state and a finalized processing state is sequentially recorded. In addition, the lead-in area 202 and the lead-out area 2
In 04, disk access information for performing disk access after the finalizing process is recorded. The disc access information includes the recording capacity of the disc after finalization processing.

In this example, the user data recording area 203 is further divided into a file system area 205, a video / audio management information area 206, and a video / audio recording area 207 from the lead-in area 202 side. In the file system area 205, file position information of a file that is a group of video and audio data after the finalizing process is recorded. Management data for managing video / audio data is sequentially recorded in the video / audio management information area 206. This management data includes unconfirmed video / audio management data before finalization processing and finalized video / audio management data after finalization processing. Video / audio recording area 207
The video and audio data compressed in the MPEG (Moving Picture Experts Group) method are sequentially recorded.

A test writing area for obtaining the recording power exists inside the disk recording management area 201, but is omitted in this description.

Of the areas of the write-once optical disk, the disk management area 201 does not exist on the read-only optical disk, but the other areas have the same area structure as the read-only optical disk. Can be used as a playback-only disc.

In each area of the write-once optical disc, once written data cannot be erased and rewritten. Therefore, at the stage where additional recording of user data is being performed on such a disc, the file position information of each recorded file, the final recording capacity of the disc, etc. are not finalized. Recording is not performed in a part of the lead-in area 202, the lead-out area 204, the file system area 205, and the video / audio management information area 206, which are areas where information to be finally determined is recorded. Disc recording management information including the recording position information of the area is recorded in the disc recording management area 201.

By the way, when the video / audio recording / reproducing apparatus is turned on or a disk is inserted, the head position of the unrecorded portion is searched based on the position information indicating the reference of the final address recorded in the disk recording management area 201. At this time, if the position information recorded in the disk recording management area 201 is not the latest information, the file system area 205 and the video / audio management information area 2
06 and the unrecorded positions of the video / audio recording area 207 are searched, and during this time, recording and reproduction are not possible. Therefore, it is desirable to record the latest position information in the disk recording management area 201 for each recording. However, even in the disk recording management area 201, once written data cannot be erased and rewritten, and since the area size is limited, the number of additional recordings is limited. It is common not to record the latest information.

For example, if the latest disk recording management information is always recorded in the disk recording management area 201 for each recording, the disk recording management information cannot be updated after a fixed number of recordings. This is because, in particular, when a large number of small video / audio data is recorded as in a video camera, there is a problem that the disk recording management information may not be updated. In addition, although it is conceivable to limit the maximum recording capacity of the user data recording area 203 by limiting the number of recording times of the disk recording management information, this makes it impossible to use the capacity of the disk effectively.
Further, during the finalizing process, in order to prohibit the subsequent writing to the disk, the disk recording management information is recorded in the disk recording management area 201 as having been finalized. That is, the unrecorded portion of the recording management area 201 needs to remain even during the finalizing process.

Prior art on this issue is configured to store file management information in memory,
As the data is written, the file management information on the memory is updated to the latest information, and the updated file management information on the memory is recorded on the disk when the power is turned off or the disk (recording medium) is taken out. This makes it possible to reduce the number of times file management information is added. (For example, see Patent Document 1)

JP 2002-238015 A

In the prior art method described in Patent Document 1 described above, the latest disk recording management information in the memory is stored in the disk recording management area 2 when the disk is ejected or the power is turned off after user data is recorded.
01 is recorded. However, there is a problem that the process of recording the latest disc record management information when the disc is ejected or the power is turned off takes time. In other words, since the rotation of the disk is stopped for power saving after the recording is stopped, in order to record the latest disk recording management information from this state, the disk is first rotated, the rotation is waited for stabilization, and then the optical head A series of processes such as moving to the recording area, recording disk recording management information, and stopping disk rotation must be performed, and at least several seconds (for example, 4 seconds) are required. In particular, in the case of a device such as a video camera, it is desirable to record the video and audio data immediately after the user makes a shooting request. However, if it takes a long time to eject the disc or turn off the power, the next power on Or a disc cannot be inserted, and it takes time to start recording, and there is a problem that a momentary photo opportunity may be missed.

The object of the present invention is to record the disc recording management information as much as possible at the end of user data recording in consideration of the above points, so that recording can be performed quickly when the power is turned on or when the disc is inserted, and the disc can be ejected. An object of the present invention is to provide a disk recording apparatus that shortens the power-off processing time and efficiently performs recording in a limited disk recording management area.

A recording method using a write-once optical disc having a user data area for recording user data and a recording management area for recording position information of the user data, the unrecorded capacity of the user data area and the unrecorded capacity of the recording management area, Based on the above, it is determined whether or not the position information related to the user data is to be recorded in the recording management area.

  As described above, an easy-to-use disk recording apparatus can be provided.

Flowchart showing the recording procedure of video / audio data on the disc of this embodiment Area structure diagram of write-once optical disc The block diagram which shows one Example of the disk recording device of a present Example Area configuration diagram showing the state of each area of a write-once optical disc in a write-once enabled state before finalization processing Flow chart showing finalize processing procedure A graph showing the relationship between the recorded rate of the video / audio recording area and the recorded rate of the disc recording management information A graph showing the relationship between the additional rate of the video / audio recording area and the additional rate when recording management data is recorded, based on the time when the previous disc recording management information was recorded

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  FIG. 2 is also an area structure diagram of the write-once optical disc according to the present embodiment.

Since the area structure of the write-once optical disc is the same as the structure described in the background art, description thereof is omitted here.

Next, the configuration of the disk recording apparatus according to this embodiment and the flow of recording processing of video / audio data will be described with reference to FIGS.

FIG. 1 is a flowchart showing a recording procedure of video / audio data on the disk of this embodiment, and FIG.
FIG. 1 is a block diagram showing a disk recording apparatus of the present embodiment.

First, the configuration of this apparatus will be described with reference to FIG. 301 is a write-once optical disk as a recording medium, 302 is an optical head unit, 303 is a spindle motor for rotating the disk, 304 is a control means for controlling the entire apparatus, 305 is a recording / reproducing means for recording / reproducing data, 306 is a memory, Reference numeral 307 denotes a power source of the apparatus, 308 denotes a disk ejection unit, 309 denotes a lens, 310 denotes a solid-state imaging device, 311 denotes a signal processing unit, 312 denotes a buffer memory, and 313 denotes a microphone.

Next, the flow of video / audio data recording processing in this apparatus will be described. In step 101, when the write-once optical disk is inserted or powered on, the control unit 304 drives the spindle motor 303 to rotate the write-once optical disk 301, and performs a learning process for improving the stability of the servo. In step 102, the control unit 304 instructs the recording / reproducing unit 305 to read out the latest disc recording management information recorded in the disc recording management area 201, and the recording / reproducing unit 305 receives the disk via the optical head unit 302. Record management area 20
The latest disc recording management information is read from 1 and output to the memory 306. Next, in step 103, the control means 304 determines that the file system area 205 and the video / audio management information area 2.
It is determined whether the position to be recorded next to 06 and the video / audio recording area 207 is fixed.

Here, the disk recording management information is stored in the disk recording management area 2 after the previous user data recording.
When the recording is normally performed in 01 and the power is turned off without the write-once optical disc 301 being ejected, and the power is turned on again, new data is not added to the user data recording area 203 and stored in the memory 306. The recorded disc record management information is the latest information.
Accordingly, the next recording position is determined from the final recording address of each area of the disk recording management information stored in the memory 306. In this case, the process of step 104 is not performed and the process proceeds to step 105.

In step 103, after recording disk recording management information is recorded in the disk recording management area 201 at the time of the previous recording such as when a new disk is inserted, new data is stored in the user data recording area 203 by another device, for example. If there is a possibility of being added,
If the latest disc recording management information is not recorded when the disc is ejected or the power is turned off, the disc recording management information stored in the reading memory 306 from the disc recording management area 201 may not be the latest information. Therefore, since the recording position after each area is not fixed, in step 104, the recording / reproducing means 305 is searched for each unrecorded position in the file system area 205, the video / audio management information area 206, and the video / audio recording area 207. Give instructions. The recording / reproducing means 305 uses the final address of the user data recorded in each area of the disk recording management information stored in the memory 306 as a reference position, and from this reference position, the file system area 205 and the video / audio management information area 206 And video / audio recording area 20
7 each unrecorded position is searched. Further, the head position of each unrecorded portion as a result of the search is determined as the recording head position of each area, and the disk recording management information stored in the memory 306 is updated. Thereafter, the process proceeds to step 105. After performing the above operations, recording / reproduction of video / audio data becomes possible.

In the search processing of each area in step 104, if the final recording address of each area of the disk recording management information stored in the memory 306 matches the actual final recording address of each area, the search is relatively performed. Although the processing time is shorter, the longer the difference between the final recording address of each area of the disk recording management information stored in the memory 306 and the actual final recording address of each area, the longer the search process. As a result, it takes a long time to record / reproduce the video / audio data. That is, the time until recording / reproduction is possible when the final recording address of each area of the latest disk recording management information recorded in the disk recording management area 201 matches the actual final recording address of each area as much as possible. Desirable for shortening.

Steps 105 and 106 are waiting for an instruction from the user. In step 105, when an instruction to record video / audio data is generated from the user, the process proceeds to step 107. Here, the light incident from the lens 309 is converted into an electrical signal by the solid-state imaging device 310 and input to the signal processing unit 311 as video data. In addition, audio data may be input from the microphone 313 to the signal processing unit 311. The signal processing means 311 performs MPEG compression processing, and the video and audio data are stored in the buffer memory 312. The control means 304 records the video and audio data stored in the buffer memory 312 in order from the recording start position of the video / audio recording area 207 of the recordable optical disc 301 via the recording / reproducing means 305 and the optical head unit 302. Along with this recording operation, recording / reproducing means 305
Updates the disk recording management information stored in the memory 306 to the latest. Thereafter, when a recording stop instruction is issued from the user, the input to the buffer memory 312 from the signal processing unit 311 is stopped, and all the video / audio data stored in the buffer memory 312 is recorded in the video / audio recording area 207. Then, the process proceeds to step 108.

In step 108, the control means 304 records the video / audio management data up to the present time at the recording start position of the video / audio management information area 206 of the recordable optical disc 301 via the recording / reproducing means 305 and the optical head unit 302. Along with this recording operation, recording / reproducing means 305
Updates the disk recording management information stored in the memory 306.

Next, at step 109, the control means 304 makes a first determination as to whether or not the latest disc recording management information can be recorded in the disc recording management area 201. If it is determined that the latest disc recording management information can be recorded, in step 110, the control means 30
4 shows the latest disc recording management information stored in the memory 306, and the recording / reproducing means 305.
And the disc recording management area 201 of the write-once optical disc 301 via the optical head unit 302.
After recording at the recording start position, the process proceeds to step 105. If it is determined in step 109 that the latest disc recording management information cannot be recorded, the process proceeds to step 105 without performing the process in step 110. Details of the first determination method will be described with reference to FIGS.

  When recording the video / audio data continuously, the series of processing from step 107 is repeated.

Further, during recording of the video / audio management data in the video / audio management information area 206 in step 108, or during execution of the recording process of the disk recording management information in the disk recording management area 201 in step 110, a recording start instruction from the user. If the signal is received, the input to the buffer memory 312 from the signal processing unit 311 is resumed and accumulated, and step 108 and step 1 are performed.
After the processing in step 10 is completed, the process proceeds to step 107, where the video and audio data stored in the buffer memory 312 is recorded in the video / audio recording area 207, thereby resuming recording without waiting for the user. I can do it.

In consideration of the case where the power supply is cut off improperly such as a power failure, during recording in the video / audio recording area 207 in step 107, for example, every time a predetermined data capacity is recorded in the video / audio recording area 207 The latest disc recording management information may be recorded in the disc recording management area 201 as appropriate.

Next, when there is no recording instruction in step 105, in step 106, the user
When a disk discharge or power-off instruction is generated, the process proceeds to step 111.

In step 111, the control means 304 makes a second determination as to whether or not the latest disc recording management information should be recorded in the disc recording management area 201. If it is determined that the latest disc record management information is to be recorded, in step 112, the control means 304 determines that the memory 3
The latest disc recording management information stored in 06 is recorded in the recording head position of the disc recording management area 201 of the write-once optical disc 301 via the recording / reproducing means 305 and the optical head unit 302, and then the process proceeds to step 113. . If it is determined not to record the latest disc record management information, the process proceeds to step 113 without performing the process of step 112.

In step 113, the control unit 304 ejects the disc via the disc ejection unit 308 when the user instruction is to eject the disc. If the user instruction is power off, the power source 307 of the apparatus is turned off. The second determination method will be described later.

Each recording area state in the middle of recording the video / audio information on the write-once optical disc will be described with reference to FIG. FIG. 4 is an area configuration diagram showing the state of each area of the write-once optical disc in a recordable state before video / audio information is recorded and finalized. In this embodiment, it is assumed that the video / audio information is recorded n times, and the disk recording management information is recorded m times by ejecting the disk or turning off the power.

Video / audio data is recorded in the video / audio recording area 207 and video / audio management data is recorded n times in the video / audio management information area 206.

In the disk recording management area 201, disk recording management information is recorded m times. The other parts are not recorded.

Next, the finalizing process procedure will be described. FIG. 5 is a flowchart showing the finalize processing procedure.

Upon receiving a finalization processing execution instruction from the user, the control means 304 first records the finally determined video / audio management data in the unrecorded area of the video / audio management information area 206 of the write-once optical disc 301 in step 501. Record in position, and further step 50
2, dummy data such as NULL data is recorded in all remaining unrecorded portions of the video / audio management information area 206. In step 503, the final file position information and the like are recorded in the file system area 205 of the write-once optical disc 301, respectively.
5 and the optical head unit 302 for recording. Next, at step 504, the control means 30.
4 records the disc recording management information including the disc write-once impossible information at the recording start position of the unrecorded area of the disc recording management area 201 of the write-once optical disc 301 via the recording / reproducing means 305 and the optical head unit 302.

In step 505, the disc recording management information and the like are recorded as the lead-out area 204 from the unrecorded area next to the final recording position in the video / audio recording area 207. In step 506, the lead-in area is recorded based on the latest disc recording management information. Data to be recorded in 202 is created and recorded in the lead-in area 202.

Here, when performing the finalizing process, it is necessary to secure an unrecorded area in which at least one disc recording management information can be recorded in the recording management area 201. The securing method will be described later.

Note that the processing order from step 501 to step 506 may be reversed if the final disk data structure is the same.

  Next, the first determination method in step 109 will be described with reference to FIG.

In step 109, it is desirable to determine to record the disc recording management information as much as possible, taking into consideration the limitation of the number of recording times of the disc recording management information depending on the size of the disc recording management area 201.

Here, attention is paid to the recorded ratio of the video / audio recording area 207 and the recorded ratio of the disc recording management information. The recorded rate of the video / audio recording area 207 is the ratio of the recording capacity of video / audio data already recorded to the maximum recordable capacity of the video / audio recording area 207. The recording rate of the disk recording management information is a ratio of the number of recorded disk recording management information to the maximum recording number of the disk recording management information in the disk recording management area 201.

FIG. 6 is a graph showing the relationship between the recorded ratio of the video / audio recording area 207 and the recorded ratio of the disc recording management information. The horizontal axis represents the recorded ratio of the video / audio recording area 207, and the vertical axis represents the recorded ratio of the disc recording management information.

Here, if the relationship between the recorded ratio of the video / audio recording area 207 and the recorded ratio of the disc recording management information is above the line A, it means that a larger amount of disc recording management information is recorded than the audio / video recording. Show. That is, if the recording to the disk recording management area 201 is continued at this rate, the disk recording management area 20 is used before the capacity of the video / audio recording area 207 is used up.
There is a high possibility that the disc recording management information cannot be recorded in the disc recording management area 201 after the capacity of 1 is used up.

Conversely, the relationship between the recorded ratio of the video / audio recording area 207 and the recorded ratio of the disc recording management information is A
If it is below the line, it indicates that there is less disc record management information recording than video / audio recording. With this ratio, even if recording in the disc recording management area 201 is performed, it is considered that the capacity of the disc recording management area 201 will not be used up until the capacity of the video / audio recording area 207 is used up. The maximum recordable capacity in the area 207 can be used effectively.

That is, in step 109, if the relationship between the recorded ratio of the video / audio recording area 207 and the recorded ratio of the disc recording management information is above the A line or below the A line, the video / audio recording area 2
It can be determined that further disc recording management information can be recorded without wasting the recording capacity of 07.

  The above is expressed by the following formula 1.1.

(B1 / b2) / (a1 / a2) ≦ 1 Equation 1.1
a1: Video / audio data capacity already recorded
a2: Maximum recording capacity of the video / audio recording area 207
b1: Number of already recorded disc record management information records
b2: Maximum number of recorded disc record management information in the disc record management area 201

When Expression 1.1 is satisfied, it can be determined that the disk recording management information may be recorded in the disk recording management area 201.

Here, as a result of recording the disc recording management information according to the determination of Expression 1.1, when considering that the line A in FIG. 6 may be exceeded, as a result of recording the disc recording management information, on the A line or the A line In order to make it lower, Formula 1.2 may be obtained by adding 1 to the disc recording management information to be recorded next to the disc recording management information recording number b1 already recorded.

      ((B1 + 1) / b2) / (a1 / a2) ≦ 1 Equation 1.2

Further, in the finalizing process, when it is necessary to secure an unrecorded area in which at least one disk recording management information can be recorded in the recording management area 201, a disc that has already been recorded is recorded. The record management information record count b1 may be further calculated by adding 1.3 to Equation 1.3.

      ((B1 + 2) / b2) / (a1 / a2) ≦ 1 Equation 1.3

Further, according to the second determination in step 111, when the disc recording management information is recorded in the disc recording management region 201, or due to factors such as the contamination of the disc, it is normally recorded at the head of the unrecorded region of the disc recording management region 201. The disc recording management area 20 cannot be again
In consideration of securing a spare area in the recording management area 201 for the case of performing an operation of recording at the next unrecorded position of one, the formula 1.4 may be used. .

((B1 + α) / b2) / (a1 / a2) ≦ 1 Equation 1.4
α: Disc recording management information reserve number (where α> = 2)

In this embodiment, formula 1.4 is used as the first determination criterion. If formula 1.4 is established in step 109, the process proceeds to step 110, and the latest disc record management information is stored in the disc record management area 201. After recording at the recording start position, the process proceeds to step 105. In step 109, when the formula 1.4 is not satisfied, the process proceeds to step 205 without performing the process of step 110.

Here, in the present embodiment, the formula 1.4 is used as the first determination criterion. However, when a reserve area for finalization processing or the like is not required, the formula 1.1 and the formula 1.2 are used. Any one of the formulas 1.3 may be used.

  Next, the second determination method in step 111 will be described.

In step 111, the disk record management information recorded in the disk record management area 201 most recently is compared with the disk record management information stored in the memory 306. If the respective disk record management information matches, It is determined that the latest disc recording management information is not recorded, and the process proceeds to step 113 without performing the process of step 112. In other words, after the recording of the video / audio information is stopped, the first determination in step 109 determines that step 1
When the latest disc recording management information is recorded in step 10, the processing in step 112 is not required. Therefore, the processing time, the time until the disc is ejected, and the time until the power is actually turned off. Shortened.

In addition, after the video / audio information recording is stopped, if the processing of step 110 is not performed by the first determination in step 109, the latest disc recording management information is not recorded in the disc recording management area 201. Therefore, in consideration of the start time when the next disc is inserted or when the power is turned on, it is desirable to record the latest disc recording management information. Therefore, it is determined that the latest disc recording management information is recorded. After recording at the recording head position of the disc recording management area 201, the process proceeds to step 113.

Here, in the finalizing process, at least 1 is stored in the disk recording management area 201.
Considering that it is necessary to secure an unrecorded area enough to record one disc record management information, it may be determined by the following formula 2.1.

b4> 1 Equation 2.1
b4: Remaining recordable number of disc record management information in the disc record management area 201

Furthermore, due to factors such as disc contamination, the normal recording cannot be performed at the beginning of the unrecorded area of the disk recording management area 201, and the recording operation is performed again at the next unrecorded position in the disk recording management area 201. In consideration of securing a spare area for recording in the recording management area 201, the following expression 2.2 may be used.

b4> β Equation 2.2
β: Number of disc recording management information recording reserves (where β ≧ 1)

In this embodiment, Expression 2.2 is used as the second determination criterion. In Step 111, when the latest disk recording management information is not recorded in the disk recording management area 201, Expression 2.2 is satisfied. In step 112, the latest disk recording management information is recorded in the disk recording management area 201, and the process proceeds to step 113. If Equation 2.2 does not hold,
The process proceeds to step 113 without performing the process of step 112.

In this embodiment, Expression 2.2 is used as the second determination criterion. However, Expression 2.1 may be used when a spare area is not required.

Finally, recording conditions for disc recording management information in finalization processing will be described. As for the finalizing process, no additional writing is performed after the finalizing process, so there is no need to make a judgment based on conditions. 201. At this time, the recording management area 20 is determined by the first determination and the second determination according to the present embodiment.
Needless to say, there is an unrecorded area for recording the disk recording management information 1.

As described above, a means for determining whether or not the disk recording management information can be updated is provided based on the ratio between the recorded capacity and the recordable capacity, and the conditions for recording the disk recording management information are appropriately determined, and the user By recording the disc record management information as much as possible at the end of data recording, recording is efficiently performed in a finite disc record management area, and the processing time for disc ejection and power-off is shortened. It is possible to provide an easy-to-use disk recording apparatus that can perform recording quickly when a disk is inserted.

Also in the finalizing process, an area for recording the disc recording management information can be secured and the finalizing process can be performed.

A second embodiment of the first determination method in the disk recording apparatus will be described. The disk recording apparatus according to the second embodiment has the same configuration as that of the first embodiment, and the recording procedure and the recording method thereof are the same as those of the first embodiment.

Here, the time when the disc recording management information was recorded at the previous recording is considered as a reference, and the remaining recordable capacity of the unrecorded area portion of the video / audio recording area 207 at the time when the disc recording management information was recorded at the previous recording. Next, the additional rate, which is the ratio of the recording capacity of the additionally recorded video / audio data, and the remaining recordable number of the unrecorded area portion of the disk recording management area 201 at the time when the disk recording management information was recorded at the previous recording time. Attention is paid to the additional rate, which is the ratio of the number of recorded disc record management information when the disc record management information to be recorded is additionally recorded.

The recording of the disc recording management information at the previous recording is performed in steps 110 and 112.
In addition to the case where the recording is performed by the present disk recording apparatus, the case where the recording is performed by another disk recording apparatus is also included.

FIG. 7 shows a video / audio recording area 2 based on the time point when the last disc recording management information was recorded.
Recording is performed next to the additional rate which is the ratio of the recording capacity of the additionally recorded video / audio data to the remaining recordable capacity of the unrecorded area portion of 07 and the remaining recordable number of the unrecorded area portion of the disc recording management area 201. Is a graph showing the relationship of the addition rate, which is the ratio of the number of recorded disc record management information when the disc record management data is additionally recorded. The horizontal axis represents the additional rate, which is the ratio of the recording capacity of the additionally recorded video / audio data to the remaining recordable capacity of the unrecorded area of the video / audio recording area 207. The vertical axis represents the disk recording management area 201.
This is an additional rate which is a ratio of the number of recorded disc record management information when the disc record management data to be recorded next is additionally recorded with respect to the remaining recordable number of the unrecorded area portion.

Here, the additional rate, which is the ratio of the recording capacity of the video / audio data recorded thereafter to the remaining recordable capacity of the unrecorded area of the video / audio recording area 207, and the remaining recording of the unrecorded area of the disc recording management area 201 are possible. If the relationship of the additional rate, which is the ratio of the number of recorded disc record management information when the disc record management data to be recorded next to the number is recorded, is above the B line, the disc record management information is recorded at the previous recording. This shows that a large amount of disc recording management information is recorded with respect to the video / audio recording recorded thereafter with reference to the recording time. In other words, if the recording is further advanced to the disk recording management area 201 when it is above the line B, the capacity of the disk recording management area 201 is used up before the capacity of the video / audio recording area 207 is finally used up. It can happen.

Conversely, the additional rate, which is the ratio of the recording capacity of the video / audio data recorded thereafter to the remaining recordable capacity of the unrecorded area of the video / audio recording area 207, and the remaining recordable number of the unrecorded area of the disc recording management area 201 If the relationship of the additional rate, which is the ratio of the number of recorded disc record management information when the disc record management data to be recorded next is recorded, is below the B line, the disc record management information is recorded at the previous recording. This indicates that there are few disc record management information records with respect to the video / audio record recorded thereafter with reference to the point in time. With this ratio, even if recording is performed in the disc recording management area 201, the video / audio recording area 207 is recorded.
It is considered that the recording capacity of the disc recording management area 201 will not be used up until the capacity of the video recording area is used up, and the maximum recordable capacity of the video / audio recording area 207 can be used effectively.

That is, in step 109, if the relationship between the addition rate of the video / audio recording area 207 and the addition rate of the disc recording management information is above the B line or below the B line, the video / audio recording area 207.
Therefore, it can be determined that further disc recording management information can be recorded without wasting recording capacity.

  The above is expressed by the following formula 3.1.

(B3 / b4) / (a3 / a4) ≦ 1 Equation 3.1
a3: Recorded audio / video data capacity from the time when the previous disc recording management information was recorded a4: Remaining recording capacity of the video / audio recording area when the previous disc recording management information was recorded b3: Disc recording management to be recorded next Number of information records (ie 1)
b4: Remaining recordable number of disc record management information in the disc record management area 201

When Expression 3.1 is satisfied, it can be determined that the disk recording management information may be recorded in the disk recording management area 201.

Further, in the finalizing process, when it is necessary to secure an unrecorded area in which at least one disk recording management information can be recorded in the recording management area 201, a disc that has already been recorded is recorded. The record management information record count b3 may be set to Equation 3.2 obtained by adding 1 to it.

      ((B3 + 1) / b4) / (a3 / a4) ≦ 1 Equation 3.2

Further, according to the second determination in step 111, when the disc recording management information is recorded in the disc recording management region 201, or due to factors such as the contamination of the disc, it is normally recorded at the head of the unrecorded region of the disc recording management region 201. The disc recording management area 20 cannot be again
In consideration of securing a spare area in the recording management area 201 for the case of performing an operation of recording at the next unrecorded position of one, the expression 3.3 may be used.

((B3 + γ) / b4) / (a3 / a4) ≦ 1 Equation 3.3
γ: Number of disc recording management information recording reserves (where γ ≧ 1)

In the second embodiment, Expression 3.3 is used as the first determination criterion. If Expression 3.3 is satisfied in Step 109, the process proceeds to Step 110, and the latest disk recording management information is recorded in the disk recording. After recording at the recording start position of the management area 201, the routine proceeds to step 105. In step 109, when the expression 3.3 is not satisfied, the process proceeds to step 205 without performing the process of step 110.

Here, in this embodiment, the expression 3.3 is used as the first determination criterion. However, when the spare area is not required, either the expression 3.1 or the expression 3.2 is used. It doesn't matter.

As described above, a means for determining whether or not the disk recording management information can be updated is provided based on the ratio between the recorded capacity and the recordable capacity, and the conditions for recording the disk recording management information are appropriately determined, and the user By recording the disc record management information as much as possible at the end of data recording, recording is efficiently performed in a finite disc record management area, and the processing time for disc ejection and power-off is shortened. It is possible to provide an easy-to-use disk recording apparatus that can perform recording quickly when a disk is inserted.

Also in the finalizing process, an area for recording the disc recording management information can be secured and the finalizing process can be performed.

201: Disc recording management area, 202 ... Lead-in area,
203 ... User data recording area, 204 ... Lead out area,
205 ... File system area, 206 ... Video / audio management information area,
207 ... Video / audio recording area, 301 ... Write-once optical disc, 302 ... Optical head,
303 ... Spindle motor, 304 ... Control means, 305 ... Recording / reproducing means,
306 ... Memory, 307 ... Device power supply, 308 ... Disc ejecting means,
309 ... Lens, 310 ... Solid-state imaging device, 311 ... Signal processing means,
312 ... Buffer memory, 313 ... Microphone

Claims (4)

A recording method using a write-once disc having a user data area for recording user data and a recording management area for recording position information of the user data,
When recording user data in the user data area of the write-once disc, the location information of the user data is stored in a memory,
When said discharging or off power to write-once disc, before SL depending on whether the remaining recordable capacity of the recording management area is capacity than required for finalization processing of the write-once disc, the position stored in the memory A recording method comprising: determining whether or not to update the recording management area using information . A recording method using a write-once disc having a user data area for recording user data and a recording management area for recording position information of the user data,
When recording user data in the user data area of the write-once disc, the location information of the user data is stored in a memory,
When the write-once disc is ejected or powered off, the remaining recordable capacity of the recording management area corresponds to the recording of user data for one time in addition to the capacity required for finalizing the write-once disc. depending on the total amount or more der Luke the dose volume to be recorded in the management area, it determines whether or not to update the recording management area using the position information stored in said memory A recording method characterized by the above. A recording apparatus using a write-once disc having a user data area for recording user data and a recording management area for recording position information of the user data,
Reading means for reading data from the write-once disc;
Recording means for recording user data on the write-once disc;
Storage means for storing position information of the user data in a memory when recording user data in the user data area of the write-once disc ;
When said discharging or off power to write-once disc, before SL depending on whether the remaining recordable capacity of the recording management area is capacity than required for finalization processing of the write-once disc, the position stored in the memory Determining means for determining whether or not to update the recording management area using information ;
A recording apparatus comprising: A recording apparatus using a write-once disc having a user data area for recording user data and a recording management area for recording position information of the user data,
Reading means for reading data from the write-once disc;
Recording means for recording user data on the write-once disc;
Storage means for storing position information of the user data in a memory when recording user data in the user data area of the write-once disc;
When the write-once disc is ejected or powered off, the remaining recordable capacity of the record management area is added to the capacity required for finalizing the write-once disc, and the record management is performed in response to one-time recording of user data. Determining means for determining whether or not to update the recording management area using the position information stored in the memory, depending on whether or not the total amount with the capacity of one time recorded in the area is greater than or equal to ,
Recording apparatus comprising: a.

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