JP2008210493A - Video data recording device and video data recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To record one piece of video and voice data so that reproduction can be correctly performed even when it is recorded ranging over a plurality of recording mediums. <P>SOLUTION: Recording medium management information is created and recorded in each recording medium. The recording medium management information has at least present recording medium identification information which is information for identifying its own recording medium and in which one continuous video and voice data is recorded; information for identifying data recorded in the own recording medium; and the last or next recording medium identification information which is information for identifying the recording medium in which one continuous data of before and after the own recording medium is recorded. This management information between recording mediums is displayed to a user, and reproduction is performed based on this recording medium management information. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a video data recording apparatus and video data recording method for recording video and audio data continuously across a plurality of recording media.

  2. Description of the Related Art Conventionally, there is a data recording / reproducing apparatus capable of recording, reproducing, and further editing various data such as video data and music data using a recording medium such as an optical disk. A typical example of an optical disc is a recordable DVD (Digital Versatile Disc). This recordable DVD is a disc-shaped recording medium having a diameter of 12 cm. There are single-layer recording layers and multilayer recording layers. In the SP mode, which has a recording capacity of about 4.7 GB for each recording layer, and is a mode in which recording is performed at a high recording rate so that recording can be performed with, for example, high image quality and high sound quality. It is possible to record video and audio data for about 2 hours.

  However, if continuous video and audio data such as a movie is recorded on one recording layer for more than 2 hours, the recording capacity exceeds 4.7 GB at a high recording rate as in the SP mode. Therefore, the recording rate must be reduced so that the total recording capacity of the video / audio data to be continuously recorded falls within 4.7 GB, and satisfactory high-quality and high-quality video / audio cannot be provided to the user.

  In order to record continuous video / audio data exceeding two hours as described above with high image quality and high sound quality, the conventional data recording / reproducing apparatus records on a plurality of recordable DVDs. However, a plurality of recordable DVDs that record continuous video and audio data exceeding two hours can manage video and audio data recorded on the DVDs themselves, but are recorded on other recordable DVDs. Video / audio data cannot be managed. Therefore, even if continuous video and audio data is recorded on a plurality of recordable DVDs, information on other recordable DVDs other than itself cannot be obtained, so that effective management cannot be performed. It was.

In view of the above problems, for example, Patent Document 1 and Patent Document 2 propose a method of performing recording management by setting a disk in a disk changer in which a plurality of optical disks are housed in a cartridge or a plurality of disk drives.
JP 2002-157824 A JP 2004-127471 A

However, the above-described conventional method still has a problem that only cartridge unit management is possible.
Moreover, since a disk changer and a plurality of drives are required and the apparatus scale becomes large, there is a problem that it cannot be applied to a mobile apparatus such as a camcorder.

  The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a video data recording apparatus for recording one video data so as to be reproduced correctly even when it is recorded across a plurality of recording media, and It is to provide a video data recording method.

  In order to solve the above-described problems, a video data recording apparatus according to the present invention divides video data into a plurality of pieces and records them across a plurality of detachable recording media, and the recording means records the recording media on the recording media. Recording control means for controlling recording, and when a head recording medium for recording the head data among the divided video data is loaded, the recording control means identifies the recording medium of the head recording medium. Information, data identification information of the top data, recording medium identification information of a next recording medium that is loaded next to the top recording medium and records next data following the top data, and data identification information of the next data The recording means records the head data on the head recording medium and controls the recording medium identification information of the head recording medium under the control of the recording control means. And the data identification information of the head data, the recording medium identification information of the next recording medium, and the data identification information of the next data, and the final data of the video data divided into a plurality is recorded. When a recording medium is loaded, the recording control means sets and temporarily stores recording medium identification information of the final recording medium and data identification information of the final data, and the recording means includes the recording control means Recording the final data on the final recording medium, and at the time of recording the recording medium identification information of the final recording medium, the data identification information of the final data, and the previous data of the previous previous recording medium Recording medium identification information of the previous recording medium set and temporarily stored and data identification information of the previous data are recorded. The video data in the present invention may be either video / audio data including audio data or video data not including audio data.

  Here, when the video data is divided into two parts, the top data and the last data, and recorded across two removable recording media, the recording medium identification information of the previous recording medium is the top data. On the other hand, the data identification information of the previous data becomes the data identification information of the head data, while the recording medium identification information of the recording medium becomes. Further, at the time of the second recording of the head recording medium, the recording means is further controlled by the recording control means to record the recording medium identification information of the next recording medium recorded on the head recording medium and the next recording medium. The data identification information of the data may be rewritten to the recording medium identification information of the final recording medium temporarily stored at the time of recording on the final recording medium and the data identification information of the final data, respectively. . In addition, when the video data is divided into the top data, the final data, and one or a plurality of intermediate data therebetween, and recorded over three or more removable recording media, the intermediate data is recorded. In the intermediate recording medium, the recording control means includes the recording medium identification information of the intermediate recording medium, the data identification information of the intermediate data, and the next data that is mounted next to the intermediate recording medium and follows the intermediate data. Recording medium identification information of the next recording medium after the intermediate recording medium to be recorded, data identification information of the next data of the intermediate data, and before the intermediate data mounted in front of the intermediate recording medium Recording medium identification information of the recording medium before the intermediate recording medium on which data is recorded and data identification information of the previous data of the intermediate data are set and temporarily stored, and the recording unit includes: Under the control of the recording control means, the intermediate data is recorded on the intermediate recording medium, the recording medium identification information of the intermediate recording medium, the data identification information of the intermediate data, and the recording medium next to the intermediate recording medium Recording medium identification information, data identification information of the next data after the intermediate data, recording medium identification information of the recording medium before the intermediate recording medium, and data identification information of the previous data of the intermediate data.

  Further, the recording control means further sets and temporarily stores sequence identification information for identifying the video data respectively recorded across a plurality of recording media, and the recording means includes the recording control means. According to the control, the sequence identification information may be recorded on each of the plurality of recording media on which the video data is recorded. Further, the recording control means further sets and temporarily stores reproduction order information indicating the reproduction order of the video data recorded across a plurality of recording media, and the recording means stores the recording control means. According to the control, the reproduction order information may be recorded on each of the plurality of recording media on which the video data is recorded. When the current recording medium is loaded, the recording control means further includes a previous representative image that is a representative image of video and audio data of the previous recording medium recorded before the current recording medium, and the previous recording medium. Previous representative image identification information for identifying a representative image, a next representative image that is a representative image of video / audio data of a next recording medium recorded next to the recording medium, and a next representative image for identifying the next representative image The representative image identification information is set and temporarily stored, and the recording unit is further controlled by the recording control unit on the current recording medium, the previous representative image, the previous representative image identification information, and the The next representative image and the next data representative image identification information may be recorded.

  Also, the video data recording method of the present invention divides the video data into a plurality of parts and records them across a plurality of removable recording media. When a recording medium is loaded, the recording medium identification information of the leading recording medium, the data identification information of the leading data, and the next recording that is loaded next to the leading recording medium and records the next data following the leading data A step of setting and temporarily storing the recording medium identification information of the medium and the data identification information of the next data, recording the head data on the head recording medium, and recording medium identification information of the head recording medium; Recording the data identification information of the head data, the recording medium identification information of the next recording medium, and the data identification information of the next data; When the final recording medium for recording the final data among the plurality of is loaded, the step of setting and temporarily storing the recording medium identification information of the final recording medium and the data identification information of the final data; In addition to recording the final data on the final recording medium, the recording medium identification information of the final recording medium, the data identification information of the final data, and the data set for recording on the previous recording medium are temporarily stored. Recording the recording medium identification information of the previous recording medium and the data identification information of the previous data.

  According to the present invention, when video data is recorded across a plurality of recording media, each of the recording media includes a recording medium before the recording of the divided video data and a recording medium of the next recording medium. Since the identification information and the identification information of the data recorded on the previous recording medium or the next recording medium are recorded, when reproducing these recording media, the previous recording medium or the next recording medium is recorded. By reading out and using the recording identification information from the above, it is possible to easily grasp the relationship between a plurality of recording media on which video data is recorded and the relationship between video data recorded on a plurality of recording media.

  FIG. 1 is a schematic configuration diagram of an embodiment of a video data recording apparatus, and FIG. 9 is a schematic configuration of an embodiment of a data reproducing apparatus of the present invention for reproducing a recording medium recorded by the above-described video data recording apparatus. FIG. In the following description, a recordable optical disk (hereinafter simply referred to as an optical disk) will be described as an example of a recording medium. However, the recording medium is not limited to an optical disk, and any removable recording medium may be a memory, an HDD, or the like. Also good. In the following, video / audio data will be described as an example, but the present invention is naturally applicable to video data that does not include audio data.

  The video data recording apparatus shown in FIG. 1 includes a video / audio compressor 100, a recording buffer 101, a disk drive 104, a recording control unit 105, and an interface 106 (hereinafter referred to as I / F 106).

  The input audio / video signal is compressed by the audio / video compressor 100, temporarily recorded in the recording buffer 101, and then recorded in a preset audio / video recording area of the optical disc 107 by the disc drive 104.

  The recording control unit 105 receives control instructions such as recording start / stop from the user as control information via the I / F 106, and based on this control information, the video / audio compressor 100, the recording buffer 101, and the disk drive 104. The recording operation is realized by controlling.

  The data playback apparatus shown in FIG. 9 includes a playback buffer 102, a video / audio decoder 103, a disk drive 104, a playback control unit 905, and an I / F 106.

  The compressed video / audio signal recorded in the preset video / audio recording area of the optical disc 107 is reproduced by the disc drive 104, temporarily recorded in the reproduction buffer 102, and then decompressed by the video / audio decoder 103. And output as a basic video / audio signal.

  The controller 105 receives control instructions such as playback start / stop from the user as control information via the I / F 106, and based on this control information, the video / audio decoder 103, the recording buffer 102, and the disk drive 104 are controlled. The playback operation is realized by controlling.

  Note that in a video data recording / reproducing apparatus that simultaneously records and reproduces video / audio data such as a video camera, both the video data recording apparatus shown in FIG. 1 and the video data reproducing apparatus shown in FIG. Will have. In this case, the functional blocks given the same reference numerals are common functional blocks. Further, the recording buffer 101 and the reproduction buffer 102 may be used as one buffer, and the recording control unit 105 and the reproduction control unit 905 may be a single control unit. The decoder 103 may also be a single video / audio compressor / decoder. Note that the recording buffer 101 and the reproduction buffer 102 are desirably large-capacity recording media such as a hard disk drive and a nonvolatile memory.

  Note that the present invention may be realized by executing a software program for performing recording and reproduction management according to the present invention in a computer having a disk drive.

Next, a first embodiment of the video data recording apparatus will be described.
Here, considering that the video data recording device and the data reproducing device have portability, only one optical disc can be loaded into the device, and a simultaneous loading mechanism for a plurality of optical discs that increases the scale of the device, No autochanger mechanism is used. Therefore, it is assumed that the user replaces the optical disk.

[Video data recording device]
First, the operation in the case of recording long-time video / audio data across a plurality of optical disks in the video data recording apparatus of FIG. 1 will be described.

  When it is detected that an optical disk (first optical disk and first disk) 107 is loaded in the disk drive 104, and a control instruction signal for starting recording is input from a remote controller (not shown), the control instruction A signal is supplied as control information to the recording control unit 105 via the I / F 106.

  When receiving a recording start control instruction signal from the outside of the user or the like via the I / F 106, the recording control unit 105 performs various controls for realizing a recording operation for each functional block in the apparatus.

  The video / audio compressor 100 performs compression encoding processing such as MPEG on the input video / audio data, and outputs the compression-coded video / audio data as a bit stream.

  The recording buffer 101 temporarily stores the video / audio data compressed and encoded by the video / audio compressor 100.

  In addition, the recording control unit 105 individually assigns control information (ID) such as a name and an identifier for identifying and managing the video / audio data to the video / audio data recorded in each recording operation. Then, it is temporarily stored in the information recording area, which is a separate area independent of the area for temporarily storing the above-mentioned video / audio data, in the recording buffer 101 as in-disk management information.

  Here, the structure of the video / audio recording area, which is an area for temporarily storing video / audio data, in the recording buffer 101 will be described.

  The video / audio recording area of the recording buffer 10 has a virtual ring structure as shown in FIG. In the video / audio recording area, the compression-coded video / audio data is sequentially recorded clockwise. The recorded video / audio data is accumulated for a time (hereinafter referred to as a grace period) that is assumed to be required for the user to change the disk, and then output to the disk drive 104 and recorded on the optical disk 107. . This grace time is, for example, about 30 seconds.

  Referring to FIG. 2, TE indicates the latest recording position of the video / audio data input from the video / audio compressor 100. TW indicates a position where the recorded video / audio data is sent to the disk drive 104. That is, there are video / audio data not yet recorded on the optical disc 107 in the gray area shown in FIG. 2, and video / audio data already recorded on the optical disc 107 exists in the white area. Therefore, this white area is an area that may be overwritten with video / audio data newly input from the video / audio compressor 100.

  While the recording processing of the video / audio data in the video / audio recording area of the optical disc 107 is being performed using the recording buffer 101 as described above, the recordable area of the video / audio recording area of the optical disc 107 is lost. Is detected by the recording control unit 105 or when the user instructs to eject the optical disc 107, the recording control unit 105 stops the recording operation. This means that the output of video / audio data from the recording buffer 101 to the disk drive 104 is stopped. Further, the generated management information of the inter-disk management information and the management information in the disk is recorded in an information recording area set separately from the video / audio recording area of the optical disk 107. Here, the in-disk management information is management information such as an address for managing recording and reproduction of video / audio data and the like recorded on the optical disk 107, and is known information. Inter-disk management information is new information newly provided in the present invention, and will be described in detail later. However, one continuous video / audio data is divided and continuously straddled across a plurality of recording media such as optical disks. Information indicating the anteroposterior relationship or relationship of the plurality of recording media when the data is recorded, and the anteroposterior relationship or relationship between the data when one continuous video / audio data is divided and recorded.

  On the other hand, the video / audio compressor 100 continues the compression encoding operation and continues to record the compressed video / audio data in the recording buffer 101.

  During this time, the recording control unit 105 ejects the recorded optical disk 107 and records the next optical disk (second optical disk, the last final disk, or an intermediate disk between the first disk and the last disk). An announcement screen including information for prompting the user to wear is generated and displayed on a display unit (not shown) via the I / F 106. The user replaces the optical disk based on the displayed information.

  At this time, if the user replaces the optical disk 107 in the period of ΔT1 in FIG. 2, the two replaced disks from the position TW at which the recording of the first optical disk 107 was stopped without overwriting the gray area. It is recorded on the optical disk 107 of the eye, and the recording of the video / audio data can be realized without interruption of the data.

  If the second optical disk 107 cannot be replaced during the period ΔT1, for example, the video / audio data output from the video / audio compressor 100 is recorded up to the position TW of the recording buffer 101, and then compressed and encoded. May be stopped to prevent overwriting of an unrecorded period (gray area in FIG. 2) on the optical disc 107.

[Disk-to-disk management information]
Next, details of the inter-disk management information generated when the video data recording apparatus described above performs continuous recording across a plurality of optical disks will be described.

  FIG. 3 shows the video / audio data recorded on each of the optical disks A and B in the case of continuous recording over a plurality of optical disks and extending over two optical disks A and B. In this case, since continuous recording is completed with two optical disks, the first optical disk A is the first disk and the second optical disk B is the last disk. Note that all video / audio data including other video / audio data recorded in the optical discs A and B is generated separately for each of the optical discs A and B. Manage with in-disk management information to manage data.

  In FIG. 3, the data identification information of the video / audio data recorded last on the optical disc A (hereinafter, the data identification information may be abbreviated as “data ID” as appropriate) is “BS # NA” (NA is a value of 1 or more). The data ID of the video / audio data first recorded on the optical disc B is “BS # 1”. The video / audio content is continuously recorded from “BS # NA” of the optical disc A to “BS # 1” of the optical disc B, and the recording is stopped after the recording of “BS # 1”.

  When the optical disk is exchanged for continuous recording of one video / audio data, the video data recording apparatus stops recording the video / audio data being recorded before ejecting the optical disk A. Then, the inter-disk management information for managing the continuous recording between the respective discs when recording on the next mounted optical disc from the stopped position is generated and recorded, and the inside of the optical disc before the ejection is recorded. In-disk management information for managing all recorded video and audio data is generated and recorded. When the inter-disk management information and the intra-disk management information are recorded on the optical disk, they are recorded after being temporarily stored in the information recording area of the recording buffer 101 as described above. In the case where one video / audio data is continuously recorded, the continuous recording is completed during the period in which the inter-disk management information is temporarily stored in the recording buffer 101. For example, as shown in FIG. It is desirable that the disc is inserted again until the last disc information is recorded as the inter-disc management information of the first disc.

FIG. 4 shows an example of inter-disk management information represented in a table.
In the inter-disk management information, in order to manage data continuously recorded across a plurality of optical disks, after the optical disk 107 is mounted on the video data recording device, the identification information of the optical disk itself (hereinafter referred to as the following) (Referred to as “disc ID”, which corresponds to the recording medium identification information in the present invention) is determined and set as a parameter for inter-disk management information, and the optical disc connected continuously with its own optical disc. Disc ID and data identification information (hereinafter referred to as “data ID”, which corresponds to the data identification information in the present invention) of video and audio data continuously recorded in the disc ID are separately obtained to obtain inter-disk management information. Set as a parameter. This acquisition method will be described later.

  Further, as parameters of inter-disk management information, sequence identification information (hereinafter referred to as “sequence ID”, which corresponds to the sequence identification information in the present invention) for identifying video and audio data to be continuously recorded, and its sequence identification information. Reproduction order information (corresponding to the reproduction order information in the present invention) indicating the reproduction order of a plurality of optical disks on which continuous video / audio data is recorded is added. Note that the sequence ID and the reproduction order information are arbitrary and may be omitted.

  In the table of FIG. 4, a column in which “-” is described indicates that no data is recorded, and a blank column indicates that “0” is recorded. Note that “0” is not used for the disk ID of the optical disk and the data ID of the video / audio data of the optical disk.

  As an example of recording continuous video / audio data across a plurality of optical disks, for example, a case as shown in FIG. 5 can be considered. This is because when one continuous video / audio data spans only between two optical disks as shown in FIG. 5 (a) and when one continuous video / audio data consists of three optical disks as shown in FIG. 5 (b). It is an example when straddling. When one continuous video / audio data spans three or more optical disks, there are a plurality of optical disks B as intermediate disks in FIG. 5B.

  Next, an example of inter-disk management information when one continuous video / audio data is recorded across two optical disks as shown in FIG. 3 will be described in detail.

  In the example of FIG. 3, when the recording control unit 105 receives an instruction to eject the optical disk A from the user via the I / F 106 or detects that the recordable area of the video / audio recording area of the optical disk A is lost, The recording of video / audio data on the optical disc A is interrupted, and inter-disc management information and intra-disc management information are generated and recorded in the information recording area of the optical disc A via the recording buffer 101.

  FIG. 6 shows an example of inter-disk management information recorded on the optical disk A at this time.

  The recording control unit 105 sets “DIDA” as the disk ID of the disk A itself and “BS # NA” as the data ID of the video / audio data continuously recorded on the disk A itself. Further, the recording control unit 105 sets “SID1” as a sequence ID indicating a series of video and audio data continuously recorded on the optical discs A and B, and “1” as reproduction order information. At this time, the disc ID of the next optical disc B to be mounted and the data ID of the video / audio data of the previous or next optical disc are unknown before replacement, and in this case, management information relating to the next optical disc B cannot be set. Therefore, “NEXT” is determined as information indicating that continuous recording is temporarily performed, and this “NEXT” is set as the disc ID and data ID of the next optical disc B as shown in FIG. Of course, “NEXT” may be set for either the disk ID or the data ID, and “NEXT” may be regarded as being set for both the disk ID and the data ID. However, the optical disk A in this example is the first (first) first disk, the next disk exists, and the previous disk does not exist, so the disk ID of the previous disk and the previous disk The data ID of the video / audio data is not set.

  Therefore, when this optical disk A is reproduced, as shown in FIG. 6, as the inter-disk management information, at least the own disk ID, the disk ID of the next disk, the data ID, etc. are recorded. When no disk ID, data ID, or the like is recorded, it can be determined that this optical disk A is the first head disk that has been continuously recorded according to the present invention.

  On the other hand, the inter-disk management information recorded on the optical disk A temporarily stored in the recording buffer 101 is stored without being erased until the next optical disk B is loaded.

  When the recording control unit 105 detects that the optical disk A has been ejected from the disk drive 104 and a new optical disk B has been loaded, the recording control unit 105 determines the disk ID of the optical disk B, sets it as a parameter, and records immediately before. As a continuation of the data ID “BS # NA” of the video / audio data of the optical disc A, the data ID of the video / audio data to be recorded on the optical disc B is determined as “BS # 1” and set as a parameter. The sequence ID indicating a series of video / audio data continuing from the optical disc A is set with the same “SID1” as that recorded on the optical disc A as a parameter. As the playback order information, “2” indicating the next playback order is set as a parameter. The inter-disk management information to be recorded on the optical disk B in which the parameters are set as described above is as shown in FIG. Similar to the inter-disk management information in the case of the optical disk A shown in FIG. 6, the sequence ID “SID1” and the reproduction order information “2” may be omitted. In this example, the optical disc B is the last final disc for which continuous recording is completed, and there is no next optical disc. Therefore, the disc ID of the next optical disc, the data ID of video / audio data, and the like are not set.

  Therefore, when this optical disk B is reproduced, as shown in FIG. 7, inter-disk management information such as at least its own disk ID, the disk ID of the previous disk, and the data ID is recorded as inter-disk management information. When the disk ID, data ID, etc. of the next disk are not recorded, it can be determined that this optical disk B is the last final disk that has been continuously recorded according to the present invention.

  As in the case of the optical disc A, the recording control unit 105 records inter-disk management information to be recorded on the optical disc B in the information recording area of the recording buffer 101.

  Next, after the recording of the video / audio data with the data ID “BS # 1” on the optical disc B is finished, the optical disc B is ejected from the disc drive 104, and the optical disc A is mounted again. The management information of the next optical disk B is set in the inter-disk management information of the optical disk A recorded incompletely.

  FIG. 8 shows an example of inter-disk management information recorded on the optical disc A when the optical disc A is mounted again.

  That is, when the optical disk A is remounted in the disk drive 104 of the video data recording apparatus, the recording control unit 105 records the inter-disk management information recorded on the optical disk A and the optical disk A recorded in the recording buffer 104. The disk ID of the inter-disk management information is compared. When the recording control unit 105 authenticates that the optical disc A is an optical disc recorded before the optical disc B and is the first recorded continuous disc on which the video / audio data having the same sequence ID is recorded, the recording control unit 105 records in the recording buffer 101. Among the disc-to-disc management information of the optical disc B, the disc ID “DIDB” of the optical disc B and the data ID “BS # 1” are the disc-to-disc management information relating to the next optical disc in the inter-disc management information of the optical disc A. It is set by overwriting as.

  FIG. 8 is a diagram showing a setting example of inter-disk management information recorded when the optical disk A is remounted as described above. Before remounting, “DIDB”, which is the disc ID of the optical disc B, is displayed in the column showing the disc ID and data ID of the next optical disc in which “NEXT”, which is the disc ID indicating that recording is to be performed next, is set. Then, “BS # 1” which is the data ID of the video / audio data continuous from the optical disc A is set. Even if the optical disk A is reinserted, it remains the first head disk, and there is no previous disk, so the disk ID of the previous disk, the ID of the video / audio data of the previous disk, etc. Is not set. Therefore, at the time of reproduction, when the disk ID of the previous disk, the data ID of the video / audio data of the previous disk, etc. are not recorded on the disk as the inter-disk management information, it can be determined that it is the first disk.

  As described above, in the video data recording apparatus of the present invention, when video / audio data is continuously recorded, the relationship between the discs before and after the continuous recording and the video / audio data is shown on each optical disc mounted at the time of replacement. As the inter-disk management information, not only the disk ID and data ID of the own disk, but also the disk ID and data ID of the previous and subsequent disks are recorded, so that one video / audio data spans a plurality of optical disks. Can be recognized continuously by referring to the inter-disk management information of each optical disc, before and after continuous recording.

  Here, the disc ID used for identification of each optical disc 107 may be information recorded in advance on the optical disc 107 by the manufacturer when the optical disc 107 is shipped, or when the optical disc 107 is mounted on the disc drive 104, the disc drive detects that it is not yet an optical disc. Alternatively, a unique disk ID may be recorded. For example, identifiable information such as the manufacturer number and serial number that is uniquely identified by the disk drive, random numbers generated by the video data recording device, time information of the recording start date, and non-volatile information in the video data recording device May be realized by recording a number assigned when a non-optical disc is loaded therein and combining it with the above information.

  In addition, when the second optical disk 107 to be mounted next is a non-optical disk before ejecting the first optical disk 107 for which the recording of video / audio data has been completed at the time of disk replacement, the second optical disk 107 is preliminarily stored. Is assigned with a disc ID different from that of the first optical disc 107 in which the disc drive 104 is currently mounted, and the ID of the video / audio data continuously recorded on the second optical disc 107 is also " It may be pre-assigned as BS # 1 "and recorded on the second optical disk 107 to be mounted next. In this case, when the first optical disk 107 is ejected, the disk ID of the next optical disk 107 is recorded in the inter-disk management information, so the first optical disk is re-recorded after the second optical disk 107 is recorded. It is not necessary to update the inter-disk management information after mounting, and it becomes possible to more easily perform inter-disk management across a plurality of disks.

  In the above description, as shown in FIG. 4 and FIGS. 6 to 8, the inter-disk management information is shown as a table. However, when actually recording on the optical disk, the parameter group manageInfoAmongDiscs as shown in FIG. () Is defined as inter-disk management information, recorded on the optical disk 107 and stored in the recording buffer 101. Each parameter of manageInfoAmongDiscs () corresponds to each column of the tables shown in FIG. 4 and FIGS.

  For example, the syntax is defined in the order as shown in FIG. 11, and 8 bytes are assigned to each parameter, and a total of 88 bytes of information is recorded as inter-disk management information on the optical disk. That is, in FIG. 11, “current_disc_ID” is the disc ID of the optical disc that is currently loaded and recorded, “previous_disc_ID” is the disc ID of the optical disc that is loaded before the current optical disc and is continuously recorded, and “previous_date_ID” is the current disc The data ID of the data recorded on the optical disk mounted and recorded in front of this optical disk, “current_date_ID1” is the data ID of the video / audio data recorded on the current optical disk continuously from the data indicated by “previous_date_ID”, “sequence_ID1” is a sequence ID that is identification information of video / audio data recorded across the current and previous optical disks, and “play_order1” is playback order information of video / audio data recorded across the current and previous optical disks. , “Next_disc_ID” is the disc ID of the optical disc to be loaded next to the current optical disc, and “next_date_ID” is The data ID “current_date_ID2” of the video / audio data recorded on the optical disc loaded next to the current optical disc is the video / audio data recorded on the current optical disc successively before the data indicated by “next_date_ID”. Data ID, “sequence_ID2” is a sequence ID for identifying video / audio data recorded across the current and next optical disks, and “play_order2” is the playback order of the current optical disks recorded across the current and next optical disks Information. When there is no continuous recording on the previous or next optical disc, for example, “0” is recorded as a parameter, and the disc ID of the optical disc or the data of video / audio data recorded on the optical disc is used as a recording rule. It is assumed that “0” is not used for the ID.

  The above description is an example of recording continuous audio / video data across two optical disks, but recording can be performed with the same operation flow when recording over three or more optical disks. is there.

  Below, for example, in a video data recording device such as a video camera that records captured image data on an optical disc such as a DVD or a Blu-ray disc, the video / audio data captured across a plurality of optical discs is recorded as one continuous data. An example of the processing at the time of doing will be described.

  FIG. 15 is a diagram illustrating an example of an outline of the progress of continuous recording when the data recording apparatus of the present embodiment is employed in a video camera or the like.

  FIG. 15 is based on the premise that one continuous video / audio data is continuously recorded and reproduced across a plurality of optical disks. In a data recording / reproducing apparatus such as a video camera, even if the recording capacity of the currently recorded optical disk runs out, it is necessary to continuously record the currently recorded shooting data on the next optical disk without interruption. Therefore, in the data recording apparatus of the present embodiment, even if the recording capacity of the currently recorded optical disk is exhausted, recording is continued in the recording buffer 101, and recording is performed in the recording buffer 101 from the point when recording of the previous optical disk 107 is completed. Before the stored photographic data is overwritten and erased, the optical disk 107 is replaced, and the photographic data from when the previous optical disk 107 has been recorded is recorded on the next optical disk 107 without interruption. Realizes continuous recording between discs. The recording buffer 101 is assumed to be a buffer memory, but may be an HDD.

  Therefore, in the video data recording apparatus of the present embodiment, as shown in FIG. 15, before the remaining capacity of the currently recorded optical disk 107 runs out, that is, at the time T1 when the remaining capacity reaches a predetermined amount, for example, Since the recording capacity of the disk #m is lost, a warning message prompting the user to prepare for disk replacement such as “Please prepare for disk replacement when continuously recording” is displayed.

  Next, in the video data recording apparatus of this embodiment, as shown in FIG. 15, at the time T2 when the remaining capacity of the currently recorded optical disk 107 is exhausted, for example, “the recording capacity of the disk #m has been exhausted. Therefore, if you want to record continuously, please replace the disk immediately. "

  In FIG. 15, after T2, shooting data is recorded in the recording buffer 101, and T3 indicates an upper limit time during which shooting data is not overwritten in the recording buffer 101. Therefore, Δt = T3−T2 is a disc replacement grace time in which recording data can be recorded in the recording buffer 101 without being overwritten.

  That is, in the video data recording apparatus according to the present embodiment, since the recording contents are recorded without being interrupted between the disks, the recording of the currently recorded disk #m is completed, and the in-disk management information and the inter-disk management are recorded on the disk #m. The time until the recording of information, the ejection of the disk #m, the replacement to the next disk #n (n = m + 1) and the recording on the disk #n is resumed is the disk replacement grace time ΔT shown in FIG. It doesn't have to exceed.

  Next, an example of a recording operation when the video data recording apparatus of the present embodiment is a video camera will be described using the flowchart of FIG. Note that the main subject of the operation in this description is the recording control unit 105.

  First, in the video data recording apparatus of the present apparatus, the recording control unit 105 detects that the first optical disk is loaded (“YES” in step S301), and detects that a recording start instruction is input from the user. Then (step S302 “YES”), recording of shooting data which is continuous video / audio data is started (step S303).

  Then, during the recording process, the recording control unit 105 first determines whether or not the time T1 shown in FIG. 15 is reached, that is, whether or not the remaining capacity of the optical disk 107 currently recorded is equal to or less than a predetermined remaining capacity. If it is determined (S304) and the remaining capacity of the optical disc 107 becomes equal to or less than the predetermined amount (S304 “YES”), as described above, for example, “the recording capacity of the disc #m will soon be exhausted. "Please prepare for disk replacement," or the like, a warning message prompting the user to prepare for disk replacement is displayed (S305). If the user finishes recording the current disc and selects or instructs to continue the continuous recording by the warning display, the process proceeds to S313 described later.

  Next, if the recording control unit 105 determines that there is no disk replacement operation or the like by the user even in the warning display of S305, whether or not the time T2 shown in FIG. It is determined whether or not the remaining capacity of the optical disc 107 is 0 (S306), and when the remaining capacity of the optical disc 107 is 0 (S306 “YES”), as described above, for example, “disc #m Since there is no longer any recording capacity, a warning message prompting the user to replace the disc is displayed (S307).

  Next, the recording control unit 105 determines whether or not the user selects to end recording on the current disc and continue continuous recording based on the warning display (S308).

  Here, when the user does not input an instruction to continue continuous recording or when a recording end signal is input to the disk 107 (S308 “No”), the recording control unit 105 continues to record a plurality of recordings so far. It is determined whether or not the recording is continuous recording on the disc (S309), and only when the recording so far is continuous recording on a plurality of discs (S309 "YES"), the above-described inter-disc specific Management information is generated and recorded on the optical disc 107 (S310). However, the inter-disk management information to be recorded here is a case where there is no optical disk 107 to be continuously recorded next, and as shown in FIG. 7, there is no inter-disk management information such as the disk ID or data ID of the next disk. This is inter-disk management information for disks.

  Even when the recording so far is continuous recording on a plurality of disks (S309 “YES”) or not on a plurality of disks (S309 “No”), the recording control unit 105 continues. Then, the same in-disk management information as described above is generated and recorded on the optical disk 107 (S311), and recording on the optical disk 107 is stopped (S312). Note that the order of the processes of S309, S310, and S311 does not necessarily need to be in this order. Of course, the process of S311 may be performed first, and then the processes of S309 and S310 may be performed.

  On the other hand, when an instruction to continue continuous recording is input from the user (S308 “YES”), the recording control unit 105 generates the inter-disk management information unique to the above-described embodiment as in S310, and In addition to recording in the optical disc 107 and the recording control unit 105 or the recording buffer 101 in this apparatus (S313), in-disk management information is generated and recorded on the optical disc 107 in the same manner as S311 (S311). However, the inter-disk management information recorded on the optical disk 107 in S313 is for the case where there is an optical disk 107 to be continuously recorded next. Unlike the inter-disk management information recorded in S310, as shown in FIG. Is the first disk with inter-disk management information for the next disk, or intermediate disk inter-disk management information with inter-disk management information for the previous disk and the next disk (not shown). It should be noted that the order of the processes of S313 and S314 is not necessarily in this order, and it is of course possible to perform the process of S314 first and then perform the process of S313.

  Then, the recording control unit 105 stops recording on the current optical disc 107, ejects the optical disc 107 (S315), and then determines whether or not the next optical disc 107 is loaded (S316). When the next optical disk 107 is loaded (S316 “YES”), it is then determined whether or not the next disk replacement is completed within the above-described disk replacement delay time ΔT shown in FIG. 15 (S317). It is determined whether or not an instruction to start recording on the next disk is input from the user (S318).

  Here, when the replacement of the next disk is completed within the disk replacement grace time ΔT (S317 “YES”) and the recording start instruction to the next disk is input from the user (S318 “YES”), the recording control unit 105 Returns to the above-described S303 and continues the continuous recording for the next optical disk 107. In contrast, if the replacement of the next disk is not completed within the disk replacement grace time ΔT (S317 “No”), and even if the replacement of the next disk is completed within the disk replacement grace time ΔT (S317 “ YES ”), if the user does not input an instruction to start recording on the next disc (“ YES ”in S318), the recording control unit 105 ends the process. Note that the processes of S317 and S318 are omitted, and when the next disk 107 is loaded (S316 “YES”), the process directly returns to the above-described S303 to continue the continuous recording on the next optical disk 107. Of course.

  As described above, according to the video data recording apparatus of the first embodiment, when video / audio data is recorded across a plurality of optical discs 107, the disc ID of the optical disc 107 currently mounted on each of the plurality of optical discs 107 is recorded. If the previous optical disk 107 or the next optical disk 107 exists, the disk ID of the previous optical disk 107 or the next optical disk 107 and the video / audio data recorded on them are included. The data ID is also recorded as inter-disk management information. Therefore, when reproducing these optical disks 107, the inter-disk information such as the disk ID and data ID of the optical disk before and the next optical disk 107 loaded is used. Read the management information By matching the parameter, it is possible to reproduce a plurality of optical disks 107 audiovisual data is recorded over consecutive without wrong order.

  In particular, in the first embodiment, as the inter-disk management information, a sequence ID for identifying video / audio data and reproduction order information indicating the reproduction order on a plurality of optical disks 107 on which the video / audio data is recorded are recorded. In order to reproduce these optical disks 107, the inter-recording medium management information is further read from the mounted optical disk 107, and each parameter of the inter-disk management information is collated. As a result, the plurality of optical discs 107 on which the video / audio data is recorded can be more reliably reproduced.

[Data playback device]
Next, FIG. 9 shows respective optical discs in which inter-disk management information and in-disc management information are recorded together with continuous video and audio data recorded across a plurality of optical discs by the video data recording apparatus. The operation in the case of reproducing in the data reproducing apparatus of the present invention as shown will be described.

  For example, in this data reproduction apparatus, the reproduction control unit 905 reads out the in-disk management information and the inter-disk management information temporarily stored in the information recording area of the reproduction buffer 102, and the inter-disk management information is recorded. Based on the parameters of the in-disk management information and the inter-disk management information, a list of video and audio data recorded on the optical disk 107 is generated as shown in FIGS. And displayed on a display unit (not shown) via the I / F 106.

  The user selects video / audio data to be reproduced via the I / F 106 based on the displayed list information. Here, the following description will be made assuming that the selected video / audio data is the first or intermediate data of continuous video / audio data recorded across a plurality of optical disks.

  The selection signal of the selected video / audio data is transmitted to the reproduction control unit 905, and the reproduction control unit 905 performs the selection on the optical disc 107 on which the selected video / audio data is recorded based on the in-disk management information and the inter-disk management information. Is sent to the disk drive 104. The disk drive 104 starts reproduction from the received address position, reads the selected video / audio data, and outputs it to the reproduction buffer 102. The reproduction buffer 102 temporarily stores the compressed video / audio data output from the disk drive 104 in a video / audio recording area that is a separate area from the information recording area.

The video / audio decoder 103 reads and decodes the video / audio data temporarily stored in the video / audio recording area of the reproduction buffer 102 to generate and output normal video / audio data.
Here, the structure of the video / audio recording area of the reproduction buffer 102 will be described.

  Similar to the recording buffer 101 described above, the video / audio recording area of the reproduction buffer 102 virtually forms a ring structure as shown in FIG. In this storage area, the compressed video / audio data read from the disk drive 104 is sequentially stored clockwise.

  In the video / audio storage area of the playback buffer 102 shown in FIG. 10, TR indicates the latest recording position of the video / audio data read from the disk drive 104. TD indicates a position at which the recorded video / audio data is sent to the video / audio decoder 103. That is, there is video / audio data that has not been output to the video / audio decoder 103 yet in the gray area shown in FIG. 10, and video / audio that has already been output to the video / audio decoder 103 and reproduced in the white area. Data exists. Therefore, this white area is an area that may be overwritten with video / audio data newly input from the disk drive 104.

  Using the reproduction buffer 102 as described above, reproduction processing from the optical disc 107 is performed. When all the selected video / audio data has been read, the recording control unit 105 stops the reproduction operation. This means that the output of the video / audio data to the reproduction buffer 101 is stopped at the TR position.

  On the other hand, the video / audio decoder 103 continues the decoding operation and continues to output the decoded video / audio data.

  During this time, the recording control unit 105 reads the disk ID of the optical disk to be reproduced next (second optical disk) from the inter-disk management information of the currently mounted optical disk in order to continue the continuous reproduction, and has been reproduced. An announcement screen including information for prompting the ejection of the optical disc and the mounting of the next optical disc to be reproduced (second optical disc) and the information of the second disc ID described above is generated and illustrated via the I / F 106. Not displayed on the display. Since the user can specify the next optical disk to be reproduced based on the displayed information, the user replaces the specified optical disk. When it is detected that the second optical disk is loaded, inter-disk management information is read from this optical disk, and the first optical disk recorded in the disk ID of this optical disk and the information recording area of the disk playback buffer 102 is read. The disk ID of the next optical disk in the inter-disk management information is compared. As a result of the comparison, if the disc IDs match and it is authenticated that the disc is the second optical disc, the in-disc management information is read from the second optical disc and temporarily stored in the information recording area of the reproduction buffer 102.

  Then, by using the inter-disk management information of the first or second optical disk temporarily stored in the information recording area of the reproduction buffer 102, recording is continuously performed on the second optical disk from the first optical disk. The ID of the recorded audio / video data is specified, the video / audio data corresponding to the specified ID is searched using the in-disk management information of the second optical disc, and the audio / video data is automatically played from the beginning. To start.

  At this time, if the user exchanges the optical disk in the period of ΔT2 in FIG. 10, the second optical disk replaced from the position TR where the reproduction of the first optical disk was stopped without overwriting the gray area. Therefore, the video / audio data can be reproduced without interruption.

  If the second optical disk cannot be replaced during the period ΔT2, for example, the video / audio data output to the video / audio decoder 103 is read to the position TR of the reproduction buffer 102, and the decoding is stopped. The overwriting of the non-reproduction period (gray area in FIG. 10) on the optical disk may be suppressed.

  The above explanation is an example of reproducing continuous video / audio data recorded across two optical disks, but continuous video / audio data recorded across three or more optical disks is reproduced. In the case of reproduction, reproduction is possible with the same operation flow.

  The flow of processing when reproducing continuous video and audio data recorded across three or more optical disks will be described below with reference to the flowcharts of FIGS. Note that the subject of the operation in this description is the reproduction control unit 905 of the data reproduction apparatus shown in FIG.

  First, in the data reproducing apparatus shown in FIG. 9, when the optical disk 107 is loaded into the disk drive 104 (S401 “YES”), the reproduction control unit 905 displays the above-described inter-disk management information written on the optical disk 107. Reading is performed (S402), and it is determined whether or not inter-disk management information is recorded on the optical disk 107 (S403). As a result, the mounted optical disk 107 is a normal optical disk 107 on which one sheet, one sheet, video / audio data or the like is recorded, or one video / audio data is recorded by the above-described video data recording apparatus of the present embodiment. It is possible to determine which of the plurality of optical disks 107 recorded in a divided manner. In addition, as will be described later, the playback order of a plurality of optical discs in which one video / audio data is divided and recorded includes whether the read inter-disc management information includes inter-disc management information related to the previous disc, or the next disc. Compare the inter-disk management information for the next disk read when the previous disk is loaded with the inter-disk management information for the previous disk recorded on the currently loaded disk. Can be identified. The playback order of the plurality of optical discs 107, that is, the first top disc or the second disc can also be confirmed by confirming the playback order information (see FIGS. 6 to 8, etc.) of the inter-disk management information. You can know if it is the third one. Note that the sequence ID (see FIGS. 6 to 8, etc.) of the inter-disk management information is information for identifying content data of a movie or program recorded on the optical disk 107, as in this example. When photographing data is targeted, it is basically unnecessary data and may be omitted. Similarly, the reproduction order information may be omitted.

  Here, when it is determined that the inter-disk management information is not recorded on the mounted optical disk 107 (S403 “No”), the optical disk 107 is a normal optical disk 107 on which one piece of image data is recorded. In this case, the playback control unit 905 reads the in-disk management information written on the optical disk 107 in accordance with a user instruction as in the conventional case (S405), and based on the in-disk management information. The reproduction of the photographic data according to the user's instruction is started (S406), and the reproduction is continued until the reproduction of the photographic data is completed or until an instruction to stop the reproduction is input from the user (S407 “No”). Then, when the reproduction of the photographic data according to the user's instruction is completed or when a reproduction stop instruction is input from the user (S407 “YES”), the reproduction of the optical disc 107 is stopped (S408). Thereafter, the disc may be ejected according to the user's instruction. Note that the processing of S404 to S408 after S403 is an example of a conventional playback processing procedure for a normal optical disc 107 on which content data such as one piece, one piece, and shooting data is recorded.

  On the other hand, when it is determined in the determination process of S403 that the inter-disk management information is recorded on the mounted optical disk 107 (S403 “YES”), the optical disk 107 is the video data recording apparatus of the present embodiment described above. For example, it is one of a plurality of optical discs 107 in which one video / audio data is divided and recorded. First, whether or not there is inter-disc management information of the previous optical disc 107 in the read inter-disc management information. Is determined (S409). As a result, if there is no inter-disk management information of the previous optical disk 107 in the read inter-disk management information, it can be determined that it is the first head disk. Whether or not “1” is set in the reproduction order information in the inter-disk management information instead of whether or not there is inter-disk management information of the previous optical disk 107 in the read inter-disk management information. With reference to this, it may be determined whether or not it is the first head disk.

  Here, when it is determined that there is no inter-disk management information of the previous optical disk 107 in the read inter-disk management information (S409 “No”), this optical disk 107 is recorded when this optical disk 107 is continuously recorded. The process proceeds to the reproduction process for the first head disk shown in FIG. It should be noted that instead of whether there is inter-disk management information of the previous optical disk 107 in the read inter-disk management information, reference is made to the reproduction order information in the inter-disk management information, and the first piece of reproduction order information is obtained. This is the same when “1” indicating that the first disk is set.

  On the other hand, if it is determined that there is inter-disk management information for the previous optical disk 107 in the read inter-disk management information (“YES” in S409), whether there is further inter-disk management information for the next optical disk 107 or not. Is determined (S410).

  When it is determined that the inter-disk management information of the previous optical disk 107 is also included in the read inter-disk management information (S409 “YES”) and the inter-disk management information of the next optical disk 107 is also present (S410 “YES”). The currently mounted optical disk 107 is the second intermediate disk or the like when continuously recording three or more sheets, and the process proceeds to the reproducing process in the case of the intermediate disk shown in FIG.

  On the other hand, when there is inter-disk management information of the previous optical disk 107 in the read inter-disk management information (S409 “YES”), it is determined that there is no inter-disk management information of the next optical disk 107 (S410). “No”), the currently mounted optical disk 107 is the last final disk for which continuous recording is completed, and the process proceeds to the reproduction process in the case of the final disk shown in FIG.

  FIG. 18 is a flowchart showing the playback processing procedure of the first head disk following the determination of “No” in S409 of FIG.

  That is, if it is determined as “No” in the determination processing of S409 in FIG. 17, the loaded optical disk 107 is the first head disk in the case of continuous recording. Waiting for the input of a reproduction start instruction (S411), and when there is an input of a reproduction start instruction from the user (S411 “YES”), the reproduction control unit 905 reads the disk written on the optical disk 107 in accordance with the user instruction. The internal management information is read (S412), and the reproduction of the photographic data in accordance with the user instruction is started based on the internal management information (S413).

  Then, the playback control unit 905 determines whether or not playback of the shooting data recorded on the first top disc is nearing the end of playback, for example, the remaining playback time is 5 minutes (S414). If it is determined that the end is near (S414 “YES”), the next disk identification information and the next data, which are specific information of the next disk, based on the next disk management information (see FIG. 6 etc.) included in the disk management information. The data identification information is generated and displayed (S415). This prompts the user to prepare for replacement with the next disk before the reproduction of the first head disk is completed.

  When the playback of the first head disk is completed to the end, or when an instruction to stop playback is input from the user (S416 “YES”), the playback control unit 905 reads the first head disk 107. Playback stop is displayed (S417), and a continuous playback instruction from the user is waited (S418).

  Here, when the continuous playback instruction is not input from the user (S418 “No”), the playback control unit 905 ends the series of playback processes, while when the continuous playback instruction is input from the user (S418 “YES”), Returning to the process of S401 in FIG. 17, the next disk is awaited.

  FIG. 19 is a flowchart showing the intermediate disc reproduction processing procedure in the case of continuous recording on three or more discs following the determination of “YES” in S410 of FIG.

  That is, if “YES” is determined in the determination process of S410 of FIG. 17, the inter-disk management information for the previous disk and the inter-disk management information for the next disk are recorded on the mounted optical disk 107. This is the case of the intermediate disc when one video / audio data is continuously recorded, and then waiting for the input of the reproduction start instruction from the user (S420), and when there is the input of the reproduction start instruction from the user (S420 “YES”), the reproduction control unit 905 first stores the disk ID and data ID of the previous disk in the inter-disk management information read from the loaded optical disk 107 before the information stored in the apparatus. It is determined whether or not the disk ID of the next disk read from the optical disk 107 loaded on the disk matches the data ID (S421). As a result, it can be determined whether or not the optical disk 107 loaded this time is an optical disk 107 continuous with the optical disk 107 loaded and played back before.

  Then, the disk ID and data ID of the previous disk read from the mounted optical disk 107 are the disk ID and data ID of the next disk read from the previously mounted optical disk 107 stored in the apparatus. If it is determined that they do not match (S421 “No”), the playback control unit 905 determines that the currently mounted optical disk 107 is not a continuous disk with the previously played disk. Is displayed (S422), the process returns to S401 in FIG. 17, and the next optical disk 107 is put on standby.

  On the other hand, the previous disk ID and previous data ID of the previous disk read from the mounted optical disk 107 are the next disk ID of the next disk read from the previously mounted optical disk 107 stored in the apparatus. If it matches the next data ID (S421 “YES”), the disc loaded this time is a disc continuous with the disc that has been played before that, and the playback control unit 905 responds to the user's instruction. The in-disk management information written on the optical disk 107 is read (S423), and the reproduction of the photographic data according to the user's instruction is started based on the in-disk management information (S424).

  Then, the playback control unit 905 determines whether or not the captured image data being played is nearing the end of playback, for example, the remaining playback time is 5 minutes (S425), and when it is determined that the playback is about to end (S425). “YES”), based on the disc ID and data ID of the next disc recorded as inter-disc management information (see FIG. 6 etc.) on the reproduced intermediate disc, the specific information of the next optical disc 107 is obtained. Generate and display (S426). This prompts the user to prepare for replacement with the next optical disk 107 before the reproduction of the intermediate disk is completed.

  When the playback of the intermediate disk being played is completed to the end, or when an instruction to stop playback is input from the user (“YES” in S427), the playback control unit 905 reads the intermediate disk 107 being played back. Playback stop is displayed (S428), and a continuous playback instruction from the user is awaited (S429).

  Here, when the continuous reproduction instruction is not input from the user (S429 “No”), the reproduction control unit 905 ends the series of reproduction processes, while when the continuous reproduction instruction is input from the user (S429 “YES”), Returning to the process of S401 in FIG. 17, the next disk is awaited.

  FIG. 20 is a flowchart showing the last final disk reproduction processing procedure following the determination of “No” in S410 of FIG.

  That is, if it is determined “No” in the determination process of S410 in FIG. 17, the mounted optical disk 107 is the last final disk when continuously recorded, and then the reproduction from the user is started. Waiting for the input of the instruction (S430), and if there is an input of the reproduction start instruction from the user (S430 "YES"), the reproduction control unit 905 first in the inter-disk management information read from the mounted optical disk 107 Whether the disk ID and data ID of the previous disk match the disk ID and data ID of the next disk read from the inter-disk management information of the previously mounted optical disk 107 stored in the apparatus. Judgment is made (S431). This makes it possible to determine whether or not the disc loaded this time is a disc that is continuous with the disc loaded and played back before that.

  Then, the disk ID and data ID of the previous disk read from the inter-disk management information of the mounted optical disk 107 are read from the inter-disk management information of the previously mounted optical disk 107 stored in the apparatus. If it is determined that the disk ID and the data ID of the disk do not match (S431 “No”), it means that the optical disk 107 loaded this time is not the optical disk 107 continuous with the optical disk 107 loaded before that. The unit 905 displays a warning indicating that the reproduction is not continuous (S432), returns to the process of S401 in FIG. 17, and waits for the next optical 107 disk to be mounted.

  On the other hand, the disk ID and data ID of the previous disk read from the inter-disk management information of the mounted optical disk 107 are read from the inter-disk management information of the previously mounted optical disk 107 stored in the apparatus. When the disk ID and data ID of the next disk match (S431 “YES”), the disk mounted this time is a disk continuous with the optical disk 107 mounted before that, and the playback control unit 905 displays the user ID. In-disk management information written on the optical disk 107 is read in response to the instruction (S433), and reproduction of the photographic data in accordance with the user instruction is started based on the in-disk management information (S434). Until playback ends or until an instruction to stop playback is input from the user (S435 "No ), Continue playing. Then, when the reproduction of the photographic data is completed or when an instruction to stop the reproduction is input from the user (S435 “YES”), the data reproduction stop of the disc is displayed (S436), and the series of reproduction processes is completed. To do.

  As described above, according to the data reproducing apparatus of the first embodiment, when the video / audio data is recorded across the plurality of optical disks 107 by the video data recording apparatus shown in FIG. If the previous optical disc 107 or the next optical disc 107 exists, not only the disc ID of the existing optical disc 107 and the ID of the video / audio data recorded on it, but the disc ID of the previous optical disc 107 or the next optical disc 107 and the recording on them Since the data ID of the video / audio data to be recorded is also recorded as inter-disk management information, when reproducing these optical disks 107, the inter-disk management information is read from the mounted optical disk 107 and mounted before that. The next disk of the inter-disk management information of the optical disk 107 stored in the reproduction buffer 102 By matching the data ID of the disk ID and over data, etc., it can be reproduced without mistake the order of the plurality of optical disks 107 in which one of video and audio data are recorded continuously over.

  In particular, in the first embodiment, as the inter-disk management information, a sequence ID for identifying video / audio data and reproduction order information indicating the reproduction order on a plurality of optical disks 107 on which the video / audio data is recorded are recorded. In order to reproduce these optical disks 107, these inter-disk management information is further read from the mounted optical disk 107, and each parameter of this inter-disk management information is collated. Thus, it is possible to more reliably reproduce the plurality of optical discs 107 on which the video / audio data is recorded.

  In the first embodiment, when reproducing these optical discs 107, a list screen showing the relationship between the previous and next discs is read based on the parameters of the inter-disc management information by reading the inter-disc management information. And the like are generated and displayed, the user can easily grasp the recording status of the data recorded across the recording media.

  Further, when this inter-disk management information is used, when the optical disk 107 that has reproduced the video / audio data is taken out and the optical disk 107 on which the next data of the video / audio data is recorded is loaded, Without instructing the playback position of the next video / audio data, it is possible to automatically search for a subsequent position and continuously play back.

  Furthermore, since an increase in the scale of the apparatus can be suppressed without requiring a disk changer or a plurality of drives, it can be mounted on a mobile apparatus such as a camcorder.

  In particular, when the data recording apparatus of the first embodiment is applied to a video camera or the like and the recording capacity of a recording medium such as an optical disk currently being recorded runs out, the recording is continued in the recording buffer 101 or the like in the apparatus. The current optical disc 107 is replaced with the next optical disc 107 before the photographing data recorded / stored in the buffer 101 is overwritten, and the next disc is recorded without interruption of the photographing data recorded in the recording buffer 101 or the like. 107, even when a plurality of recording media are exchanged to record video / audio data, the captured video / audio data is not interrupted, and the data is correlated between the recording media. Continuous recording can be realized.

Next, a second embodiment of the present invention will be described.
In the second embodiment, in addition to the features of the first embodiment described above, representative images for recording the contents of video and audio data continuously recorded on the preceding and following optical discs are recorded and the representative images for identifying the representative images are recorded. In this embodiment, the identification information is added as one of the parameters of the inter-disk management information.

  FIG. 12 is a diagram illustrating an example of inter-disk management information according to the second embodiment.

  The inter-disk management information of the second embodiment shown in FIG. 12 is the video / audio data of the optical disc continuously recorded before the current optical disc in the inter-disc management information manageInfoAmongDiscs () shown in FIG. 11 used in the first embodiment. Previous_data_image_ID, which is representative image identification information for identifying a representative image representing the contents of the image, and a representative image identification for identifying a representative image representing the contents of the video / audio data of the optical disk recorded continuously after the current optical disk Information and Next_data_image_ID are added as parameters. Of course, current_data_image_ID, which is representative image identification information for identifying a representative image representing the contents of the video / audio data of the current optical disc 107, may be added.

  The control entry 105 generates representative images of the front and rear optical disks 107 and the like together with inter-disk management information when recording data, and records them on the optical disk 107. For example, if 8 bytes are assigned to this representative image identification information as in the other parameters, the inter-disk management information is 104 bytes in total.

[Video data recording device]
Next, the inter-disk management information to which the representative image identification information is added and the video data recording apparatus of the second embodiment for generating and recording the representative image will be described.

  The configuration and operation of the video data recording apparatus according to the second embodiment are substantially the same as those of the first embodiment shown in FIG. 1, and detailed description thereof will be omitted. explain.

  The difference from the first embodiment is mainly the operation of the recording control unit 105, and the operation of the controller 102 will be mainly described.

  That is, the recording control unit 105 in the second embodiment generates a representative image of the video / audio data to be recorded in the video / audio recording area at the same timing as the timing for generating the inter-disk management information in the first embodiment. The representative image identification information for identifying the representative image is added to the parameters of the inter-disk management information. Then, the generated representative image and inter-disk management information are recorded in the information recording area of the optical disk.

  The representative image may be one obtained by extracting any one image of the recorded video / audio data, or may be a reduced image obtained by thinning out pixels of the extracted one image. Further, instead of an arbitrary image, an image selected by the user via the I / F 106 may be used.

  Further, the recording control unit 105 records this representative image in the recording buffer 101 together with the inter-disk management information and the like.

  Then, when the next optical disk 107 is loaded, the recording control unit 105 reads the representative image stored in the recording buffer 101 together with the inter-disk management information, and the previous optical disk 107 is loaded on the next optical disk 107 loaded. The representative image and the inter-disk management information of the next optical disk 107 loaded are recorded as the representative image and the inter-disk management information of the next optical disk 107 to be loaded. To record. Thereby, when the next optical disc 107 is mounted and the inter-disk management information of the next optical disc 107 is set as the inter-disk management information of the next optical disc 107, the representative image identification information for identifying this representative image Is also reset to the representative image identification information of the previous optical disc.

  Note that the representative image on the optical disk 107 to be mounted next must be extracted from the video / audio data that is not yet recorded following the video / audio data to be recorded on the optical disk 107 that is currently mounted. Therefore, for example, the video / audio data scheduled to be recorded on the next optical disk 107, which is temporarily stored in the recording buffer 101, is pre-read and created from this video / audio data. Then, representative image identification information for identifying the generated representative image is also determined in advance at this time.

  Further, like the method for generating inter-disk management information described in the first embodiment, it may be set when the previous optical disk 107 is remounted without being created at the present time.

  The above description is an example of recording continuous audio / video data across two optical disks, but recording can be performed with the same operation flow when recording over three or more optical disks. is there.

  The processing flow in this case is only described by adding representative image identification information as a parameter of the management information between the representative image and the disc to the flowchart showing the processing on the recording side of the first embodiment shown in FIG. To do.

[Data playback device]
Next, the optical data 107 in which the representative image and the inter-disk management information including the representative image identification information of the representative image are recorded together with the continuous video / audio data is reproduced by the video data recording apparatus of the second embodiment. The operation of the data reproducing apparatus will be described with reference to FIGS. 9 and 5 (a).

  FIG. 21 is a flowchart showing an example of the reproducing operation in the data reproducing apparatus of the second embodiment.

  The steps different from the flowchart showing an example of the reproducing operation in the data reproducing apparatus of the first embodiment shown in FIG. 17 are that the optical disk 107 is mounted on the disk drive 104 in the data reproducing apparatus of the second embodiment (S401 “YES”). Then, the above-mentioned inter-disk management information written on the optical disk 107 is read (S402), and if it is determined that the inter-disk management information is recorded on the optical disk 107 (S403 “YES”), the process of S409 Thus, before determining whether the read inter-disk management information includes the previous inter-disk management information related to the previous optical disk 107, as shown in FIGS. A representative image of the video and audio data recorded on the In addition, at least one of the previous representative image and the next representative image is displayed based on the previous representative image ID or the next representative image ID, and the read previous disk ID (DIDA) and previous data ID (BS # NA) are displayed. Alternatively, based on the next disk ID (NEXT) and the next data ID (NEXT), this is a new step for displaying a continuous relationship between the contemporary table image and at least one of the previous representative image or the next representative image. It is only the point which has.

  For example, as shown in FIG. 5A, an optical disc B (an intermediate disc) when the audio / video data is recorded on three or more optical discs 107 as shown in FIG. When the second optical disk) is loaded, the recording control unit 105 detects it, controls the disk drive 104, reads the in-disk management information and the inter-disk management information from the loaded optical disk B, Temporarily store in the reproduction buffer 102. At this time, the representative image specified by the representative image identification information of the inter-disk management information read from the loaded optical disk B is also read and temporarily stored in the reproduction buffer 102.

  Thereafter, the recording control unit 105 reads out the intra-disk management information and the inter-disk management information temporarily stored in the reproduction buffer 102, and based on the parameters of the intra-disk management information and the inter-disk management information, this optical disk The video / audio data list information recorded in 107 is generated as a video list, which will be described later, and displayed on a display unit (not shown) via the I / F 106.

  Therefore, according to the second embodiment, the representative images of the optical disc before and after being identified by the representative image identification information of the previous optical disc and the representative image identification information of the subsequent optical disc added as parameters of the inter-disc management information are obtained. It can be displayed in the list information.

  FIGS. 13 and 14 show that an optical disk B, which is an intermediate disk when the recording control unit 105 of the second embodiment records video and audio data on three or more optical disks 107 as shown in FIG. 5A, is inserted. 22 shows a display example of the video list generated by the inter-disk management information read from the optical disc B and the representative image by the processing of S510 shown in FIG.

  In the video lists shown in FIGS. 13 and 14, representative images of the respective data IDs read from the optical disc B are displayed in squares surrounding “BS # NA” and “BS # 1” indicating the data IDs.

  As shown in FIG. 5A, the optical disk B is an intermediate disk, and there are a disk A and a disk B that are continuous before and after the intermediate disk. The video lists shown in FIGS. 13 and 14 are recorded on the optical disk B. “BS # NA” indicating a data ID is a representative image extracted from the existing audio / video data and a representative image of the audio / video data recorded on the optical discs A and C before and after being continuously recorded on the optical disc B. And “BS # 1” are displayed in a square.

  Further, since the video / audio data continuity is also known from the inter-disk management information of the optical disk B, the reproduction control unit 905 shows the continuous video / audio data based on the inter-disk management information as shown in FIGS. In addition, the connection by the arrow or the like indicates that the video / audio data connected by the arrow is the video / audio data continuously recorded between the disks.

  As described above, according to the second embodiment, when the optical disc 107 is loaded, the inter-disk management information, the representative image, and the video / audio data are read, and the video / audio data recorded on the optical disc B is read. The representative image and the representative images of the video and audio data of the preceding and following optical discs A and C continuously recorded on the optical disc B are displayed, and the disc B mounted based on the inter-disc management information and the disc The representative images of the video / audio data recorded on the discs A and C before and after B are displayed as a video list while the continuous relationship is indicated by an arrow or the like.

  Thus, the user can select the video / audio data to be reproduced via the I / F 106 based on the list information of the representative images in the displayed video list. At this time, for example, as shown in FIG. 14, when the video / audio data of the data ID “BS # 1” recorded on the optical disc B is selected by the user, the video / audio of the data ID “BS # 1” is selected. The data is video / audio data continuously recorded after the video / audio data of the data ID “BS # NA” of the optical disc A. The reproduction control unit 905, for example, reads the disc as “There is a continuation”. A message notifying that the video / audio data of the data ID “BS # NA” of the disc A continuously recorded before the video / audio data of the data ID “BS # 1” of B exists is displayed on the display unit.

  At this time, if the user wants to view the video / audio data of the data ID “BS # 1” on the disc B alone and selects the video / audio data of the data ID “BS # 1”, the user is requested to connect the video / audio data via the I / F 106. Then, a selection signal for reproducing the video / audio data of the data ID “BS # 1” is transmitted to the reproduction control unit 905. Then, based on the in-disk management information and the inter-disk management information of the disk B, the playback control unit 905 stores the position (address) information on the optical disk on which the video / audio data with the data ID “BS # 1” is recorded. Send to drive 104. The disk drive 104 reads the video / audio data with the data ID “BS # 1” by starting reproduction from the received address position.

  On the other hand, when the user wants to view the continuously recorded video / audio data from the beginning, the user ejects the disk B from the disk drive 104 and mounts the disk A.

  When the reproduction control unit 905 detects that the disk A is loaded, the reproduction control unit 905 reads the disk management information and the disk management information from the disk A, and records the disk ID of the disk A itself and the reproduction buffer 102 before the disk replacement. The disk ID of the previous optical disk is compared with the inter-disk management information of the disk B being recorded. When the disk IDs match and it is authenticated that the disk is A, the in-disk management information is read from the disk A and temporarily stored in the reproduction buffer 102 as with the disk B.

  Next, the playback control unit 905 records the video / audio data with the data ID “BS # NA” based on the in-disk management information and the inter-disk management information of the disk A temporarily stored in the playback buffer 102. Position (address) information on the optical disk is sent to the disk drive 104. The disk drive 104 reads the video / audio data with the data ID “BS # NA” by starting reproduction from the received address position. On the other hand, if the disc IDs do not match, the playback control unit 905 displays a message for disc replacement prompting the correct optical disc installation on the I / F 106.

  The above description is an example of reproducing continuous video / audio data recorded over three optical disks, but continuous video recorded over two or four or more optical disks. When audio data is reproduced, it can be reproduced with the same operation flow.

  As described above, the reproduction processing flow of the second embodiment is obtained by adding representative image identification information as a parameter of the management information between the representative image and the disc to the reproduction operation processing in the data reproducing apparatus of the first embodiment. The process of FIGS. 18-20 is also the same.

  As described above, according to the second embodiment, in addition to the effects of the first embodiment, when the data recorded continuously is reproduced, the data is recorded on the recording medium to be reproduced and the recording media before and after the recording medium. As shown in FIGS. 13 and 14, a representative image showing the content of the video / audio data being displayed can be displayed with arrows indicating the continuous relationship. Therefore, in addition to the effects obtained in the first embodiment, it is possible to visually recognize the presence / absence and contents of data for the user, and to provide an on-screen interface for reproduction that is highly compatible with the user. Is possible.

  The present invention includes a program for causing a computer to realize the functions of the apparatus described above, and a recording medium on which such a program is recorded. These programs may be read from a recording medium and loaded into a computer, or may be transmitted via a communication network and loaded into a computer.

  In the above-described embodiments, the optical disk has been described as an example of the recording medium. However, the present invention is not limited to this, and the present invention is also applicable to a recording medium such as a memory or an HDD.

It is a block diagram which shows schematic structure of a video data recording device. It is a figure which shows an example of the recording buffer which comprises a link structure. It is a figure which shows an example of the data recording straddling two optical disks. It is the figure which described the management information between disks recorded on an optical disk. It is a figure which shows an example of the data recording over 3 optical disks. It is the figure which described the management information between disks recorded when the optical disk A was discharged. It is the figure which described the management information between disks recorded at the time of the optical disk B recording. It is the figure which described the management information between disks recorded at the time of the optical disk A remounting. It is a block diagram which shows schematic structure of the data reproduction apparatus of this invention. It is a figure which shows an example of the reproduction | regeneration buffer which comprises a link structure. It is a figure which shows 1st Example which defined the syntax of the management information between disks recorded on an optical disk. It is a figure which shows the 2nd Example which defined the syntax of the management information between disks recorded on an optical disk. It is a figure which shows an example which displays the representative screen of the image data currently recorded on the disc B, and the image data continuous between discs. It is a figure which shows an example which displays the representative screen of the image data currently recorded on the disc B, and the image data continuous between discs. It is a figure which shows an example of the progress outline | summary in the continuous recording in 1st Example. It is a flowchart which shows an example of the recording operation | movement in the video data recording device of 1st Example. It is a flowchart which shows an example of the reproduction | regeneration operation | movement in the data reproduction apparatus of 1st Example. FIG. 18 is a flowchart showing a playback operation portion in the case of the first leading disk in the flowchart shown in FIG. 17. FIG. 18 is a flowchart showing a playback operation portion in the case of an intermediate disc when three or more sheets are continuously recorded in the flowchart shown in FIG. 17. FIG. 18 is a flowchart showing a playback operation portion in the case of the last final disc in the flowchart shown in FIG. 17. FIG. It is a flowchart which shows an example of the reproduction | regeneration operation | movement in the data reproduction apparatus of 2nd Example.

Explanation of symbols

100: video / audio compressor 101: recording buffer 102: playback buffer 103: video / audio decoder 104: disk drive (recording means, playback means)
105: Recording control unit (recording control means)
106: Interface (I / F)
107: Optical disk 905: Playback control unit (playback control means)

Claims (8)

Recording means for dividing the video data into a plurality of pieces and recording them across a plurality of removable recording media,
Recording control means for controlling recording on the recording medium by the recording means,
When the top recording medium that records the top data of the video data divided into multiple parts is loaded,
The recording control means includes
Recording medium identification information of the head recording medium, data identification information of the head data, recording medium identification information of a next recording medium that is loaded next to the head recording medium and records next data following the head data, The data identification information of the next data is set and temporarily stored,
The recording means is
Under the control of the recording control means, the head data is recorded on the head recording medium, recording medium identification information of the head recording medium, data identification information of the head data, and recording medium identification information of the next recording medium And the data identification information of the next data,
When the final recording medium that records the final data of the video data divided into a plurality is loaded,
The recording control means includes
The recording medium identification information of the final recording medium and the data identification information of the final data are set and temporarily stored,
The recording means is
Under the control of the recording control means, the final data is recorded on the final recording medium, and the recording medium identification information of the final recording medium, the data identification information of the final data, and the previous recording medium Recording the recording medium identification information of the previous recording medium that was set and temporarily stored at the time of data recording, and the data identification information of the previous data,
A video data recording apparatus characterized by the above. The video data recording apparatus according to claim 1, wherein
When video data is divided into two parts, the top data and the last data, and recorded across two removable recording media,
The recording medium identification information of the previous recording medium becomes recording medium identification information of the first recording medium, while the data identification information of the previous data becomes data identification information of the first data.
A video data recording apparatus characterized by the above. The video data recording apparatus according to claim 2, wherein
During the second recording of the top recording medium,
The recording means further includes:
Under the control of the recording control means, the recording medium identification information of the next recording medium and the data identification information of the next data recorded on the leading recording medium are temporarily stored at the time of recording on the final recording medium, respectively. Rewriting the recording medium identification information of the final recording medium and the data identification information of the final data,
A video data recording apparatus characterized by the above. The video data recording apparatus according to claim 1, wherein
When video data is divided into the top data, the final data, and one or a plurality of intermediate data therebetween, and recorded across three or more removable recording media,
In the intermediate recording medium for recording the intermediate data,
The recording control means includes
The recording medium identification information of the intermediate recording medium, the data identification information of the intermediate data, and the recording medium next to the intermediate recording medium on which the next data following the intermediate data is recorded. Recording medium identification information, data identification information of data next to the intermediate data, and recording before the intermediate recording medium that is mounted before the intermediate recording medium and records previous data before the intermediate data The recording medium identification information of the medium and the data identification information of the previous data of the intermediate data are set and temporarily stored,
The recording means is
Under the control of the recording control means, the intermediate data is recorded on the intermediate recording medium, recording medium identification information of the intermediate recording medium, data identification information of the intermediate data, and a recording medium next to the intermediate recording medium Recording medium identification information, data identification information of the next data after the intermediate data, recording medium identification information of the recording medium before the intermediate recording medium, and data identification information of the previous data of the intermediate data,
A video data recording apparatus characterized by the above. In the video data recording device according to any one of claims 1 to 4,
The recording control means further sets and temporarily stores sequence identification information for identifying the video data recorded across a plurality of recording media,
The recording means is
Under the control of the recording control means, the sequence identification information is recorded on each of the plurality of recording media on which the video data is recorded.
A video data recording apparatus characterized by the above. In the video data recording device according to any one of claims 1 to 4,
The recording control means further sets and temporarily stores reproduction order information indicating the reproduction order of the video data recorded across a plurality of recording media,
The recording means is
Under the control of the recording control means, the reproduction order information is recorded on each of the plurality of recording media on which the video data is recorded.
A video data recording apparatus characterized by the above. The video data recording apparatus according to claim 4, wherein
If the current recording medium is loaded,
The recording control means further includes:
Next to the previous representative image that is the representative image of the video / audio data of the previous recording medium recorded before the current recording medium, previous representative image identification information for identifying the previous representative image, and the recording medium The next representative image that is the representative image of the video / audio data of the next recording medium to be recorded and the next representative image identification information for identifying the next representative image are set and temporarily stored,
The recording means is
Under the control of the recording control means, the previous representative image, the previous representative image identification information, the next representative image, and the next data representative image identification information are further recorded on the current recording medium.
A video data recording apparatus characterized by the above. When the video data is divided into a plurality of pieces and recorded across a plurality of removable recording media, when the top recording medium for recording the top data of the video data divided into a plurality is attached,
Recording medium identification information of the head recording medium, data identification information of the head data, recording medium identification information of a next recording medium that is loaded next to the head recording medium and records next data following the head data, Setting and temporarily storing data identification information of the next data;
Recording the top data on the top recording medium, recording medium identification information of the top recording medium, data identification information of the top data, recording medium identification information of the next recording medium, and data identification of the next data Performing a step of recording information;
When the final recording medium that records the final data of the video data divided into a plurality is loaded,
Setting and temporarily storing recording medium identification information of the final recording medium and data identification information of the final data;
In addition to recording the final data on the final recording medium, the recording medium identification information of the final recording medium, the data identification information of the final data, and the data set for recording on the previous recording medium are temporarily stored. Recording the recording medium identification information of the previous recording medium and the data identification information of the previous data;
A video data recording method comprising:

Images