JP2002074851A - Disk recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that it is needed to read out files which are divided and are arranged on a disk in a real time recording and reproduction. SOLUTION: A specific continuous area where management files are to be recorded is provided on a disk and a disk recording and reproducing device is constituted so as to always record the management files in the area. When the device is started or a disk is loaded in the device, since the device just reads out continuously the management files from the leading position of the area, the rising time of the device is shortened. Moreover, it is possible to further shorten a processing time by constituting the disk so as to secure the area at the innermost periphery of the disk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording / reproducing apparatus, and more particularly to a real-time data recording method for generating and recording video / audio data and management information indicating an outline and additional contents of the data at the time of recording. The present invention relates to a disk recording / reproducing apparatus that outputs the video / audio data using management information.

[0002]

2. Description of the Related Art Methods and apparatuses for recording and reproducing data such as images and sounds (AV) on rewritable recording media such as optical disks and magneto-optical disks have been actively developed. Data recorded on such an optical disk or a magneto-optical disk is managed as a file.

In the conventional example, for example, Japanese Patent Application Laid-Open No. 11-1
As described in JP 87354, an AV file containing a plurality of video / audio data and a management file containing program chain (PGC) information designating a plurality of partial sections in the AV data are recorded on the same optical disk. There is something.

[0004] In the prior art, when editing, a P
By rewriting the GC information and processing / outputting the AV data in response to this, the image / audio editing on a single recording medium is realized.

FIG. 5 shows a directory structure of a file generated on an optical disk by a recording operation as an example. A sub-directory 51 for real-time recording and a sub-directory 52 for recording additional information are arranged below the root directory 50, and all the generated management files and AV data files are stored in the sub-directory 51.
Is placed under Management information of the recorded data is written in the management file 511, and address information and attribute information of AV data, as well as encoding parameter information and PG
C information and the like are included. The moving image file 512 is a file in which AV data coded and multiplexed as a moving image is recorded. Even when a new moving image is recorded, a separate file is not generated, but is sequentially stored in this file. Will be added. The still image file 513 is a file in which AV data encoded and multiplexed as a still image is recorded, and a new still image is added to this file as described above. A file 521 for additional information other than the management file and the image file described above is placed under the subdirectory 52, and is used for a user operation during recording and reproduction.

[0006]

When data is recorded in real time on an optical disk or a magneto-optical disk, the additionally recorded data is added to a predetermined file as a file as described above. Physically, it is randomly arranged in a free area on the disk. The data arranged and recorded in the plurality of portions is read out from the disk through a predetermined recording / reproducing rule called a file system, and apparently provided to the user as a file format such as the above-described AV file or management file. You.

When the data recorded in this way is reproduced from the disk (or new AV data is recorded on the disk), the procedure is as follows.
11 is developed first, and the moving image file 5
It is necessary to reproduce (or record at a desired position) from the desired position of the still image file 12 or the still image file 513. In other words, when the device is turned on or when a disk is inserted, in addition to the time for initial drive of the disk drive, the time for seeking, reading, and reconstructing the management file randomly arranged on the disk is also considered. Was needed.

When the apparatus is operated through the user interface, the above-mentioned additional information file 521 is also read from the state of being randomly arranged on the disk similarly to the case of the management file 511. It took time to read and reconfigure.

However, in the above-mentioned conventional example, these points are not particularly mentioned.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to shorten the management file read time and improve the operational feeling at the time of starting or inserting a disc. Another object of the present invention is to improve the operational feeling at the time of user operation via a user interface or the like by shortening the time required to read an additional information file or the like.

[0011]

In order to achieve the above object, according to the present invention, an area for continuously arranging a management file on a disk is secured, and when rewriting a management file, the area on the disk is always rewritten. It is configured to write to the area. In order to further improve the reading speed, a recording area for the management file is secured at the innermost circumference of the disk.

Regarding the additional information file, an area which can be continuously arranged on the disk is secured in advance, and when the additional information file is newly rewritten, it is always written in the area on the disk.

[0013]

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

FIG. 1 is a block diagram showing a first embodiment of a disk recording / reproducing apparatus according to the present invention. 1 is an input unit, 2 is an encoding / decoding unit (hereinafter referred to as a Codec unit),
3 is a user interface (I / F) unit, 4 is a control unit,
5 is a program memory, 6 is a management information expansion memory,
7 is a track buffer, 8 is a drive, 9 is an optical disk, and 10 is an output unit.

First, the operation at the time of recording will be described. The image and audio data input in the input unit 1 are Cod
In the ec unit 2, the data is encoded by a predetermined encoding method,
The information amount is compressed and sequentially multiplexed. The multiplexed AV data is temporarily stored in the track buffer 7 in order to absorb the difference between the encoding rate and the transfer rate of the drive 8, and is sequentially recorded on the optical disk 9 from the drive 8. The control unit 4 performs control operations of the respective units based on an instruction input by an operator via the user I / F unit 3, and reads and writes the program memory 5 as necessary for the control contents. Is loaded. Cod
Although the ec unit 2 is shown collectively, a case where a part of the encoding is performed by hardware, and other multiplexing is performed by software controlled by the control unit 4 is realized by a complex configuration. There is also.

Since it is difficult to record the management file generated at the time of recording on the optical disk 9 together with the AV data in real time, the management file is temporarily developed and updated in the management information development memory 6, and the recording of the AV data is completed. After that, it is recorded on the optical disc 9. When the AV data is recorded on the optical disc 9 for the first time, the management file is newly generated and developed in the management information development memory 6, but when the AV file is recorded on the optical disc in the past, the management file is After being read from the optical disk 9, the data is expanded in the management information expanding memory 6. As in the new case, when the recording of the AV data on the optical disk 9 is completed, the updated management file is recorded on the optical disk 9.

Next, the operation at the time of reproduction will be described. FIG.
Then, the AV data encoded by the drive 8 is read from the optical disk 9 by a flow reverse to the recording operation described above, and is temporarily stored in the track buffer 7. AV data is read out by absorbing the difference between the transfer rate of the drive and the coding rate of the video and audio data, the video data and the voice data are separated and decoded by the codec unit 2, and output in an appropriate signal format by the output unit 10. Is done.

As in the case of recording, the control section 4 controls the above-mentioned sections by loading the contents of the program memory 5, but prior to this, the optical disk 9
The management file is read out from the management file by the drive 8 and the contents are expanded in the management information expansion memory 6. User I
The instruction input by the operator input via the / F unit 3 is interpreted by the control unit 4, and the above-described reproduction operation is performed according to the management information developed in the management information development memory 6.

Here, the data arrangement on the optical disk 9 updated by the recording / reproducing operation will be described.

FIG. 2 is a diagram schematically showing an area (volume space) on the optical disk 9 where data can be recorded. The hatched portion is the area for the management file, the solid portion is the AV file, and the other white portions have no data recorded or data other than AV applications (such as data for personal computers). Is an area where is recorded.

The moving image file 512 and the still image file 513 in FIG. 5 find a certain continuous area as an AV file as shown in FIG. On the other hand, regarding the management file 511,
It is recorded in an area secured in the management file area so as to be packed in the innermost circumference. If the management file is smaller than the maximum size of the management file area (512 kbytes in this case), the remaining part is stuffed with data 0.
When the device is turned on or when an optical disk is inserted, management information is always read continuously from the innermost circumference of the volume space. can do.

In the present embodiment, the maximum size of the management file area is set to 512 kBytes, which is the same as the maximum file size that the management file 511 can actually take. However, a defective area (unwritable area) on the disk is taken into consideration. Then, a larger area may be reserved as a management file area. In the present embodiment, the management file area is secured at the innermost circumference of the volume space. However, this is not limited to this, and 512 kByte (or a larger size) may be stored in a part other than the innermost circumference. A configuration in which a continuous area is secured may be adopted. In this case, even when another data (such as data for a personal computer) is already recorded in the innermost circumference of the volume space, the area for the management file can be secured as a continuous area by avoiding this.

Next, a second embodiment of the disk recording / reproducing apparatus according to the present invention will be described with reference to FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description is omitted.

FIG. 3 is a block diagram of the disk recording / reproducing apparatus according to the present embodiment, and the additional information expanding memory 11 has a new configuration as compared with FIG.

When recording AV data, the additional information file 521 in FIG. 5 is generated at the same time.

The additional information file includes thumbnail data of AV data to be recorded, attribute information not included in the management file, and the like. As an operation, the additional information file is once expanded in the additional information expansion memory 11,
The data is updated, and is additionally recorded on the optical disk 9 sequentially for each recording unit of the AV data.

On the other hand, when reproducing the AV data, the user I /
The additional information file is read from the optical disk 9 by the drive 8 in accordance with the instruction content of the F unit 3 in the same manner as in the case of the management information described above, and the content is developed in the additional information development memory 11. The expanded additional information is used to assist the user in performing an operation, for example, to constitute a thumbnail displayed on a screen.

FIG. 4 is a diagram schematically showing a volume space on the optical disk 9 when additional information is also recorded. As in the case of FIG. 2, a portion indicated by oblique lines is a management file area, a portion indicated by filling is an AV file,
The white part is an area where no data is recorded or data other than AV applications (such as data for personal computers) is recorded, and the part indicated by a vertical line is an area for additional information files.

The additional information file area is also secured as a continuous area in the same manner as the management file area. Further, as in the case of the management file 511, the additional information file 521 is also recorded in the additional information file area in such a manner that the additional information file area is packed from the inner circumferential direction. .

If it is desired to display a thumbnail or the like using the additional information file, the seek position of the head of the additional information file area on the disk 9 allows the additional information data to be read continuously. With this configuration, the processing time can be reduced as compared with the case where the divided and arranged parts are sought and read and the additional information file is reconfigured.

In this embodiment, the maximum size of the additional information file area is not particularly defined. However, the required size is greatly different depending on, for example, the size of an image to be generated and recorded for a thumbnail. What is necessary is to secure a continuous area of a necessary and sufficient size (or a larger size in consideration of a defective area) as the entire information file. Further, in this embodiment, a case has been described in which the additional information file area is secured at an appropriate position in the volume space. However, for example, a structure is ensured in the innermost circumference of the volume space instead of the management file area. May be. In addition, even when another data (such as data for a personal computer) is already recorded on the innermost circumference of the volume space, a configuration for securing an additional information file area as a continuous area on the innermost circumference excluding it is also possible. It is possible.

[0032]

As described above, according to the present invention, an area for arranging the management file continuously on the disk is secured, and when the management file is rewritten, the area is always written to the area on the disk. By configuring to
It is possible to shorten the rise time when the apparatus is started or when a disc is inserted. Further, by securing the recording area for the first-term management file at the innermost circumference of the disk, the reading time can be further reduced.

Further, according to the present invention, also for the additional information file, an area that can be continuously arranged on the disk is secured in advance, and when the additional information file is newly rewritten, the area is always written to the area on the disk. With such a configuration, the rise time of the user operation using the additional information can be reduced, and the operational feeling can be improved. Further, by securing the recording area of the additional information file at the innermost circumference of the disk, further reduction in processing time can be expected.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a disk recording / reproducing apparatus according to the present invention.

FIG. 2 is a diagram for explaining an arrangement of a management file area in a volume space.

FIG. 3 is a block diagram showing a second embodiment of the disk recording / reproducing apparatus according to the present invention.

FIG. 4 is a diagram for explaining an arrangement of an additional information file area in a volume space.

FIG. 5 is a view showing a file configuration recorded on an optical disc.

[Explanation of symbols]

1 input unit, 2 codec unit, 3 user I / F unit,
4 control unit, 5 program memory, 6 management information expansion memory, 7 track buffer, 8 drive,
9 ... optical disk, 10 ... output unit, 11 ... memory for developing additional information.

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 5C052 AA02 AA03 AB03 AB10 CC11 5D044 AB07 BC06 CC04 DE22 DE53 DE57 5D110 AA17 AA29 DA03 DA04 DB03 DC05 DC16 DE04 DE06

Claims (4)

[Claims] 1. A disk recording / reproducing apparatus which records management information of image / audio data together with image / audio data on a disk in real time and reproduces the image / audio data based on the management information. A disk recording / reproducing apparatus, wherein a sufficient area for continuously recording information is secured, and the management information is always recorded in the continuous area. 2. The disk recording / reproducing apparatus according to claim 1, wherein the continuous area is secured on an innermost circumference on the disk. 3. The image / audio data, together with management information of the image / audio data and additional information necessary for reproduction, are recorded on a disc in real time, and the image / audio data is reproduced based on the management information. In a disc recording / reproducing apparatus that reproduces the video / audio data using the additional information, a sufficient area for continuously recording the additional information on the disk is secured, and the additional information is always stored in the continuous area. A disk recording / reproducing apparatus characterized by being configured to record. 4. The disk recording / reproducing apparatus according to claim 3, wherein the continuous area is secured on an innermost circumference on the disk.