JP2008282456A - Recording apparatus and recording method - Google Patents

Abstract

Generation of noise is suppressed by preventing frequent occurrence of seek between an inner circumference side and an outer circumference side with management file backup.
A management file recorded in a reserved area 201 on the inner circumference side of an optical disk 106 is collectively read when performing finalization processing. Even when the management file in the reserved area 201 is copied to the backup area 203 as a backup data recorded in the backup area 203 on the outer periphery side of the optical disk 106, frequent seeks can be prevented, and noise can be prevented. To prevent frequent occurrence.
[Selection] Figure 1

Description

  The present invention relates to a recording apparatus, a recording method, a program, and a storage medium, and more particularly to a technique suitable for use in backing up a management file that depends on a stream.

  2. Description of the Related Art Conventionally, recording apparatuses that record video data and audio data on an optical disk such as a DVD are known. In such a disk recording apparatus, as shown in FIG. 6, when recording and reproducing in real time, it is necessary to read a file of image / audio data (AV) dividedly arranged on the disk recording medium 10. Therefore, a specific continuous area for recording a management information file (management file) related to the AV file is provided on the disk recording medium 10, and the management file is always recorded in this area. In this way, when the recording apparatus is started up or when the disc recording medium 10 is inserted, the management file has only to be read continuously from the head position of the area, so that the rise time is shortened. Also disclosed is a disk recording / reproducing apparatus that can further reduce the processing time by securing the area in the innermost circumference of the disk (see, for example, Patent Document 1).

  Furthermore, in order to increase the reliability of the management file recorded on the disc, there is also known one that records a back file of the management file located on the inner circumference side on the outer circumference side of the disc.

JP 2002-74851 A

  As described above, in the configuration in which the back file of the management file is recorded on the outer peripheral side of the disc, the back file of the management file related to the AV file is recorded every time one AV file is recorded. However, in order to record the same back file as the management file recorded on the inner circumference of the disc on the outer circumference side of the disc, it is necessary to move the pickup from the inner circumference side of the disc to the outer circumference side. As a result, there is a problem that noise is frequently generated. In particular, when a backup file is recorded each time one AV file is recorded, pickup movement (seek) is frequently performed, and noise from the seek motor becomes a problem.

  The present invention has been made in view of the above-described problems, and it is an object of the present invention to suppress the generation of noise by preventing frequent seeks between the inner peripheral side and the outer peripheral side with management file backup.

  The recording apparatus of the present invention includes a recording means for recording image data on a disk recording medium, providing a reserved area on the disk recording medium, and recording management information of the image data in the reserved area, and the disk recording medium And a memory for storing the management information of the plurality of image data read by the reading unit, in accordance with a finalize instruction for the image data. A control means for controlling the recording means to record a backup area that is discontinuous with the reserved area on the disk recording medium, and recording management information stored in the memory as backup data in the backup area; According to the backup data recorded by the recording means, the disk recording medium And having a file system changing means for changing the § yl system information.

  The recording method of the present invention includes a recording step of recording image data on a disk recording medium, providing a reserved area on the disk recording medium, and recording management information of the image data in the reserved area, and the disk recording medium In response to a finalize instruction, a read step for reading management information of the plurality of image data recorded in the reserved area, and a backup area that is discontinuous with the reserved area are provided on the disk recording medium. A control step for controlling processing in the recording step so as to record management information stored in a memory for storing management information of the plurality of image data read in the step as backup data in the backup region; and According to the recorded backup data, the file related to the disk recording medium And having a file system change step of changing the system information.

  The program of the present invention records image data on a disk recording medium, provides a reserved area on the disk recording medium, and records management information of the image data in the reserved area; In accordance with a finalize instruction, a reading process of reading management information of the plurality of image data recorded in the reserved area, a backup area that is discontinuous with the reserved area on the disk recording medium, and the reading process A control step for controlling the processing in the recording step so as to record the management information stored in the memory for storing the management information of the plurality of image data read in step 1 as backup data, and recording in the recording step According to the backed up data. Characterized in that to execute a file system change step of changing the mail system information to the computer.

  The storage medium of the present invention stores the program described above.

  According to the present invention, the management information recorded in the reserved area of the disk recording medium is read when performing the finalizing process, and recorded as backup data in a backup area that is discontinuous from the reserved area of the disk. . As a result, it is possible to prevent frequent pickup seeks as the backup file is recorded, and to prevent frequent noise generation.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram illustrating an example of the overall configuration of the recording apparatus of the present embodiment.
In FIG. 1, reference numeral 101 denotes a camera signal processing unit that converts an electrical signal output from an image sensor into a camera signal. Reference numeral 102 denotes a moving image data output from the camera signal processing unit 101 that is compressed and encoded by the MPEG method. MPEG circuit.

  Reference numeral 103 denotes a stream buffer that stores compressed data output from the MPEG circuit 102, and reference numeral 104 denotes an ATA interface that serves as an interface with the disk drive 105. Reference numeral 105 denotes a disk drive that reads and writes data from and to the optical disk 106, and reference numeral 106 denotes an optical disk that stores data. The disk drive 105 includes a pickup that writes and reads data by irradiating the optical disk 106 with a light beam, and a sensor that receives reflected light from the disk. Further, the disk drive 105 has a mechanism such as a seek motor that moves the pickup in the disk radial direction and a spindle motor that rotates the optical disk 106.

  Reference numeral 107 denotes a management information processing unit that creates stream data information (stream information) output from the MPEG circuit 102 in a predetermined file format. Reference numeral 108 denotes a management file memory for accumulating stream information output from the management information processing unit 107, and reference numeral 109 denotes a microcomputer that controls each block constituting the recording apparatus 100.

  In FIG. 1, image data output from a CCD (not shown) that is an image sensor is input to the camera signal processing unit 101. The camera signal processing unit 101 performs known processing on the input image data and outputs the processed image data to the MPEG circuit 102. The MPEG circuit 102 encodes the input image data according to the MPEG system and compresses the amount of information. The apparatus shown in FIG. 1 includes an audio input unit (not shown), and the input audio data is also output to the MPEG circuit 102. The MPEG circuit 102 encodes image data and audio data, and outputs the encoded data to the stream buffer 103 as stream data (image / audio data). The stream buffer 103 stores the stream data output from the MPEG circuit 102.

  The stream data stored in the stream buffer 103 is monitored by the microcomputer 109, and the microcomputer 109 reads stream data for a predetermined size when the data stored in the stream buffer 103 exceeds the predetermined size. The read stream data is transferred as a file to the disk drive 105 via the ATA interface 104 in accordance with a file system using UDF (Universal Disk Format) mounted on the microcomputer 109. The disk drive 105 writes the transferred file (image / audio data) to the sequentially designated physical addresses of the optical disk 106.

  In addition, when compressing the moving image data output from the camera signal processing unit 101, the MPEG circuit 102 outputs stream information such as the size of the encoded data and the recording time length to the management information processing unit 107. The management information processing unit 107 takes in the stream information output from the MPEG circuit 102 and stores it in the management file memory 108 that functions as a buffer. Note that the memory size of the management file memory 108 is a size that allows the management files recorded on the optical disk 106 to be stored together.

  The stream information stored in the management file memory 108 is read out as a management file after the recording of the stream is completed according to the file system implemented on the microcomputer 109. The read management file is transferred to the disk drive 105 via the ATA interface 104 and recorded on the optical disk 106.

  In the present embodiment, a series of video and audio streams recorded on the optical disc 106 between a recording start instruction and a recording stop instruction from a user by an operation unit (not shown) is managed as one file. In addition, a management file is created each time one video / audio stream is recorded on the optical disk 106 and recorded in the reserved area 201. Also, the backup file is not recorded at the end of recording of one video / audio stream, but is recorded at the time of finalization as will be described later.

  In this embodiment, the microcomputer 109 generates file system information (UDF information) indicating the recording position and configuration of the file recorded on the optical disc 106. Each time one stream data is recorded on the optical disk 106, the file system information is updated using the internal memory. Then, when the apparatus is turned off or the optical disk 106 is ejected, the data is written in a predetermined UDF area on the innermost circumference side of the optical disk 106.

  Further, when the optical disk 106 is loaded, the microcomputer 109 reads this UDF information, stores it in the internal memory, and updates it according to the data recording on the optical disk 106. Further, as described later, when the backup file is recorded along with the finalization of the optical disk 106, the UDF information is updated and recorded in the UDF area of the optical disk 106.

  FIG. 2 is a diagram showing a recording format on a two-layer optical disc. The reserved area 201, stream area 202, and backup area 203 are allocated in order from the inner circumference side.

  A reserved area (management area) 201 on the inner circumference side is an area for recording stream information (management file) accumulated in the management file memory 108. The stream area 202 is an area for recording stream data. The outer peripheral backup area 203 is an area for copying and backing up the management file recorded in the reserved area 201 when performing the finalizing process. Therefore, the backup area 203 has the same capacity as the reserved area 201. In the finalization process, data recorded on the optical disc 106 can be reproduced by a device other than the recording device 100 of the present embodiment by recording predetermined data such as a management file on the optical disc 106. Is a process for

  In the present embodiment, the size of the stream information generated by the management information processing unit 107 increases in proportion to the recording time of the corresponding stream data. Therefore, the size of the reserved area 201 to be secured at this time is determined based on the recording time of stream data that can be recorded on the optical disk 106.

  FIG. 3 is a diagram showing a state on the optical disc 106 immediately before performing the finalizing process. N stream data are recorded in the stream area 202, and the same number of management files as the stream data are recorded in the reserved area 201. In this state, when an instruction for finalization processing is received from the operator, a backup operation as shown in the flowchart of FIG. 4 is performed.

FIG. 4 is a flowchart illustrating an example of a processing procedure of a backup operation performed by the recording apparatus 100 according to the present embodiment. Each process shown in FIG. 4 is performed under the control of the microcomputer 109 functioning as a control unit.
In FIG. 4, first, when an instruction for finalization processing is received from the operator, the backup operation is started. First, in step S401, the free area of the reserved area 201 is padded. Referring to FIG. 2, the disk drive 105 is connected via the ATA interface 104 to fill the empty area by writing dummy data to the empty area after N management files are recorded in the reserved area 201. Instruct.

  Next, in step S 402 and subsequent steps, data including the management file (management information) recorded in the reserved area 201 is copied to the backup area 203 of the optical disk 106. First, in step S <b> 402, it is determined whether all data in the reserved area 201 has been copied to the backup area 203. If all the data has not been copied to the backup area 203 as a result of this determination, the process proceeds to step S403.

  In step S403, the disk drive 105 functions as a reading unit under the control of the microcomputer 109, and reads data including the management file in the reserved area 201 from the optical disk 106 at a time. Then, it is stored in the management file memory 108 via the ATA interface 104. Note that the size of data to be read can be increased up to the memory size of the management file memory 108, which is the maximum size assumed for the management file. As described above, the memory size of the management file memory 108 is such a size that the management files recorded in the reserved area 201 of the optical disc 106 can be read in a batch.

  Next, in step S 404, the data stored in the management file memory 108 is sent to the disk drive 105 via the ATA interface 104. Then, under the control of the microcomputer 109, the disk drive 105 functions as a recording unit, and writes the data in the backup area 203 of the optical disk 106 all at once. Then, the process returns to step S402.

  At this time, the microcomputer 109 controls the disk drive 105 via the ATA interface 104, reads the management file recorded in the reserved area 201, and then seeks the pickup to the backup area on the outer periphery of the disk.

  On the other hand, if it is determined in step S402 that all the data in the reserved area 201 has been copied to the backup area 203, the process proceeds to step S405. In step S405, the microcomputer 109 functions as a file system changing unit, registers the backup data of the management file in the reserved area 201 existing in the backup area 203 in the file system using UDF, and ends the process.

Next, details of processing for registering the file entry of the management file in the file system using UDF will be described with reference to the flowchart of FIG. Each process shown in FIG. 5 is performed under the control of the microcomputer 109, and is a process for enabling the backup data to be read as the management file when the management file is read.
First, in step S501, it is determined whether all backup management files have been registered in the file system using UDF. If all the management files are not registered as a result of this determination, the process proceeds to step S502.

  In step S502, “File Entry” of the management file in the reserved area 201 is read out. In “File Entry”, file attributes are written, and the file name, file address on the disk, size, update date and time, and the like are written.

  Next, in step S503, the read “File Entry” is converted into the “File Entry” of the management file in the backup area 203. Specifically, the file name “File Entry” of the management file in the reserved area 201 and the address of the management file on the optical disk 106 are changed to those of the management file in the backup area 203. As a result, the address of the management file on the optical disk 106 is obtained by adding a difference from the head of the reserved area 201 to the head of the backup area 203.

  After making these changes, in step S504, “File Entry” of the backup management file is added to the file system using UDF and registered. Then, the process returns to step S501. On the other hand, if all the management files have been registered as a result of the determination in step S501, the process ends.

  The microcomputer 109 records the information of the file system updated and registered in this way on the optical disc 106 by the disc drive 105.

  As described above, in the present embodiment, the management files recorded in the reserved area 201 on the inner periphery side of the optical disc 106 are collectively read when performing the finalizing process. Then, the backup data is collectively recorded in the backup area 203 on the outer peripheral side of the optical disk 106. Thus, even when the management file in the reserved area 201 is copied to the backup area 203, frequent seeks can be prevented, and as a result, frequent noises can be prevented.

  In this embodiment, a management file area is provided on the inner circumference side of the disk recording medium, and a backup area is provided on the outer circumference side. However, the present invention is not limited to this, and when the management file area and the backup area are discontinuous on the disk recording medium, a pickup seek always occurs when the backup file is recorded. Therefore, the present invention can be similarly applied to a configuration in which the management file area and the backup area are discontinuous on the disk recording medium as described above, and the same effect is obtained.

(Other embodiments according to the present invention)
Each means constituting the recording apparatus and each step of the recording method in the embodiment of the present invention described above can be realized by operating a program stored in a RAM or ROM of a computer. This program and a computer-readable storage medium storing the program are included in the present invention.

  In addition, the present invention can be implemented as, for example, a system, apparatus, method, program, storage medium, or the like. Specifically, the present invention may be applied to a system including a plurality of devices. The present invention may be applied to an apparatus composed of a single device.

  The present invention includes a case where a software program (in the embodiment, a program corresponding to the flowcharts shown in FIGS. 4 and 5) for realizing the functions of the above-described embodiments is supplied directly or remotely to a system or apparatus. . This includes the case where the system or the computer of the apparatus is also achieved by reading and executing the supplied program code.

  Accordingly, since the functions of the present invention are implemented by computer, the program code installed in the computer also implements the present invention. In other words, the present invention includes a computer program itself for realizing the functional processing of the present invention.

  In that case, as long as it has the function of a program, it may be in the form of object code, a program executed by an interpreter, script data supplied to the OS, and the like.

  Examples of the storage medium for supplying the program include a flexible disk, a hard disk, an optical disk, and a magneto-optical disk. Further, there are MO, CD-ROM, CD-R, CD-RW, magnetic tape, nonvolatile memory card, ROM, DVD (DVD-ROM, DVD-R) and the like.

  As another program supply method, there is a method of connecting to a homepage on the Internet using a browser of a client computer. It can also be supplied by downloading the computer program itself of the present invention or a compressed file including an automatic installation function from a homepage to a storage medium such as a hard disk.

  It can also be realized by dividing the program code constituting the program of the present invention into a plurality of files and downloading each file from a different homepage. That is, a WWW server that allows a plurality of users to download a program file for realizing the functional processing of the present invention on a computer is also included in the present invention.

  As another method, the program of the present invention is encrypted, stored in a recording medium such as a CD-ROM, distributed to users, and encrypted from a homepage via the Internet to users who have cleared predetermined conditions. Download the key information to be solved. It is also possible to execute the encrypted program by using the key information and install the program on a computer.

  Further, the functions of the above-described embodiments are realized by the computer executing the read program. Furthermore, based on the instructions of the program, an OS or the like running on the computer performs part or all of the actual processing, and the functions of the above-described embodiments can be realized by the processing.

  As another method, a program read from a storage medium is first written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. Then, based on the instructions of the program, the CPU or the like provided in the function expansion board or function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are also realized by the processing.

1 is a block diagram illustrating an example of the overall configuration of a recording apparatus according to an embodiment of the present invention. It is a figure which shows file arrangement | positioning on an optical disk. It is a figure which shows an example of the state of the disc before finalization. It is a flowchart which shows an example of the procedure of the backup process in embodiment of this invention. 5 is a flowchart illustrating an example of a processing procedure for registering a File Entry in a file system using UDF in the embodiment of the present invention. It is a figure which shows file arrangement | positioning on an optical disk.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Recording device 101 Camera signal processing part 102 MPEG circuit 103 Stream buffer 104 ATA interface 105 Disk drive 106 Optical disk 107 Management information processing part 108 Management file memory 109 Microcomputer

Claims (12)

Recording means for recording image data on a disk recording medium, providing a reserved area on the disk recording medium, and recording management information of the image data in the reserved area;
Reading means for reading management information of the plurality of image data recorded in the reserved area in response to a finalize instruction for the disk recording medium;
A memory for storing management information of the plurality of image data read by the reading unit;
A control means for controlling the recording means to record the backup information in the backup area as backup data by providing a backup area discontinuous with the reserved area on the disk recording medium;
A recording apparatus comprising: file system changing means for changing file system information relating to the disk recording medium in accordance with backup data recorded by the recording means.   The file system changing unit changes the file system by registering a file entry indicating a file attribute after all the management information is recorded in the backup area by the recording unit. The recording device described in 1.   3. The file system changing unit converts a file entry of management information recorded in the reserved area into a file entry of the backup data, and registers the converted file entry. Recording device.   The memory has a capacity capable of storing management information corresponding to all the image data recorded on the disk recording medium, and the reading unit collects management information corresponding to all the image data from the reserved area at a time. The recording apparatus according to claim 1, wherein the data is read out and stored in the memory.   5. The recording apparatus according to claim 1, wherein the recording unit records the file system information changed by the file system changing unit on the disc recording medium in accordance with the finalize instruction. 6. Recording device. A recording step of recording image data on a disk recording medium, providing a reserved area on the disk recording medium, and recording management information of the image data in the reserved area;
A reading step of reading management information of the plurality of image data recorded in the reserved area in response to a finalize instruction for the disk recording medium;
A backup area that is discontinuous with the reserved area is provided on the disk recording medium, and management information stored in a memory that stores management information of the plurality of image data read in the reading step is used as backup data, and the backup A control step for controlling the processing in the recording step to record in the area;
And a file system changing step of changing file system information relating to the disk recording medium in accordance with the backup data recorded in the recording step.   The file system changing step includes changing the file system by registering a file entry indicating a file attribute after all the management information is recorded in the backup area in the recording step. 6. The recording method according to 6.   8. The file system change step according to claim 7, wherein a file entry of management information recorded in the reserved area is converted into a file entry of the backup data, and the converted file entry is registered. The recording method described.   The memory has a capacity capable of storing management information corresponding to all the image data recorded on the disk recording medium, and management information corresponding to all the image data from the reserved area in the reading step. 7. The recording method according to claim 6, wherein the data is read out in a lump and stored in the memory.   The file system information changed in the file system changing step is recorded in the disk recording medium in the recording step according to the finalize instruction. Recording method. A recording step of recording image data on a disk recording medium, providing a reserved area on the disk recording medium, and recording management information of the image data in the reserved area;
A reading step of reading management information of the plurality of image data recorded in the reserved area in response to a finalize instruction for the disk recording medium;
A backup area that is discontinuous with the reserved area is provided on the disk recording medium, and management information stored in a memory that stores management information of the plurality of image data read in the reading step is used as backup data, and the backup A control step for controlling the processing in the recording step to record in the area;
A program for causing a computer to execute a file system changing step for changing file system information relating to the disk recording medium in accordance with backup data recorded in the recording step.   A computer-readable storage medium storing the program according to claim 11.

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