JP4171986B2 - Recording apparatus and method, and program - Google Patents

Description

  The present invention relates to a recording apparatus, method, and program, and in particular, when data is recorded on a recording medium, the data recorded on the recording medium even when the recording process is not completed normally The present invention relates to a recording apparatus and method, and a program that can read data.

  As a recording medium for recording an image picked up by a digital video camera, a magnetic tape, an optical disk, and the like are known. Recording medium for managing video data (and collected audio) data (hereinafter referred to as AV data together with video data and audio data) using a file system such as an optical disc In the case of recording on the recording medium, there is an advantage that video and audio can be reproduced from a desired position more quickly than in the case of recording on the magnetic tape.

  Here, the file system is recorded on the optical disc after the recording of the AV data on the optical disc is completed, and includes information such as the file name of the AV data and the recording position of the AV data on the optical disc. .

  Files such as AV data recorded on the optical disc are managed by this file system. For example, when playing back an optical disc, the playback device refers to the file system recorded on the optical disc, and acquires the file name of one or more files recorded on the optical disc, the recording position of each file on the optical disc, and the like. To do. When the user instructs the reproduction of the desired file, the recording position of the instructed file is specified based on the file system, and AV data or the like constituting the file is read from the recording position and reproduced.

  Note that the recording positions of AV data and the like are not necessarily collected at one place, but may be distributed at a plurality of recording positions on the optical disc. In such a case, a plurality of distributed recording positions corresponding to one file are recorded in the file system. Therefore, even when a file composed of AV data and the like recorded in a plurality of recording areas is reproduced, all the AV data and the like recorded in a distributed manner can be read based on the file system (for example, , See Patent Document 1).

Japanese Patent Laid-Open No. 11-88221

  However, in a conventional recording apparatus such as a digital video camera, power is supplied during shooting and while recording AV data on an optical disk or immediately after shooting, for example, by accidentally removing the battery. May stop, the file system corresponding to the recorded AV data may become unrecorded. In such a case, there is a problem that even if an attempt is made to reproduce the optical disk after the power is restored, the recorded AV data is not recognized because the corresponding file system does not exist, and therefore the AV data is not reproduced.

  In order to avoid the occurrence of the above-mentioned situation, a method of updating the file system every time a predetermined unit amount of AV data is recorded on the optical disk is also conceivable. However, since the file system and the AV data are usually recorded at different positions on the optical disk, if the file system is updated frequently, it is necessary to frequently move the pickup for writing to the optical disk. This has a problem that not only the generation of a seek sound but also the ratio of the seek time to a series of recording times increases, resulting in a decrease in recording efficiency.

  Further, the above-described problem is expected to occur even when data other than AV data is recorded on the optical disc.

  The present invention has been made in view of such a situation, and an object of the present invention is to enable data recorded on a recording medium to be read even when recording processing on the recording medium is not normally completed. .

The recording apparatus of the present invention is used for salvage processing for reflecting, in a file system, divided data that is recorded in a recording medium but not reflected in the file system, for each of a plurality of divided data constituting one file. Generating means for generating at least a marker including arrangement information on the recording medium of the divided data recorded on the recording medium, and the divided data and the divided data and the marker so that the divided data and the marker are arranged in a predetermined order on the recording medium. and recording means for recording a marker in the recording medium, viewed contains a holding means for holding the placement information of the marker on the recording medium, generating means, storing the location information on the recording medium of the divided data recorded on a recording medium Then, a marker is generated, and a marker whose marker data size has reached a predetermined upper limit is designated as a key marker .

  The holding means may be a nonvolatile memory.

  The holding means may hold key marker arrangement information generated by the generating means.

  The holding means can also hold arrangement information on the recording medium of the divided data recorded on the recording medium that is not recorded on the recording medium in a state of being included in the marker.

  The recording apparatus of the present invention includes a reading unit that reads a marker from a recording medium based on marker arrangement information held by the holding unit, and a salvage unit that executes salvage processing based on the marker read by the reading unit. Can further be included.

The recording method of the present invention is used for salvage processing for reflecting, in a file system, divided data that is recorded in a recording medium but not reflected in the file system, for each of a plurality of divided data constituting one file. A generating step for generating at least a marker including arrangement information on the recording medium of the divided data recorded on the recording medium, and the divided data and the divided data and the marker are arranged in a predetermined order on the recording medium. accumulation and recording step of recording a marker in the recording medium, viewed including a holding step of holding arrangement information of the marker on the recording medium, generating step, the location information on the recording medium of the divided data recorded on a recording medium Then, a marker is generated, and a marker whose data size has reached a predetermined upper limit is designated as a key marker .

The program of the present invention is used for salvage processing for reflecting, in a file system, divided data that is recorded in a recording medium but not reflected in the file system, for each of a plurality of divided data constituting one file. A generation step of generating a marker including at least arrangement information of the divided data recorded on the recording medium on the recording medium, and the divided data and the marker so that the divided data and the marker are arranged in a predetermined order on the recording medium. a recording step of recording on a recording medium, viewed including a holding step for holding the placement information of the marker on the recording medium, generating step accumulates the placement information on the recording medium of the divided data recorded on a recording medium Te, and it generates a marker, computer processing of the data size of the markers specified in Kimaka what has reached a predetermined upper limit Characterized in that to execute the.

In the recording apparatus, method, and program of the present invention, for each of a plurality of divided data constituting one file, the divided data that is recorded in the recording medium but not reflected in the file system is reflected in the file system. Used for salvage processing for generating a marker that includes at least the arrangement information of the divided data recorded on the recording medium on the recording medium, and arranging the divided data and the marker in a predetermined order on the recording medium It is recorded on the recording medium, and the marker arrangement information on the recording medium is held. In the generation process, arrangement information on the recording medium of the divided data recorded on the recording medium is accumulated to generate a marker, and a marker whose data size has reached a predetermined upper limit is designated as a key marker.

  According to the present invention, it is possible to read data recorded on a recording medium even when the recording process on the recording medium is not normally completed.

  Embodiments of the present invention will be described below. Correspondences between constituent elements described in the claims and specific examples in the embodiments of the present invention are exemplified as follows. This description is to confirm that specific examples supporting the invention described in the claims are described in the embodiments of the invention. Therefore, even if there are specific examples that are described in the embodiment of the invention but are not described here as corresponding to the configuration requirements, the specific examples are not included in the configuration. It does not mean that it does not correspond to a requirement. On the contrary, even if a specific example is described here as corresponding to a configuration requirement, this means that the specific example does not correspond to a configuration requirement other than the configuration requirement. not.

  Further, this description does not mean that all the inventions corresponding to the specific examples described in the embodiments of the invention are described in the claims. In other words, this description is an invention corresponding to the specific example described in the embodiment of the invention, and the existence of an invention not described in the claims of this application, that is, a future divisional application. It does not deny the existence of an invention that is added by correction.

The recording apparatus according to claim 1 (for example, the recording / reproducing apparatus 110 in FIG. 7) records a plurality of divided data (for example, annual ring data) constituting one file on a recording medium (for example, the optical disk 111). Marker (for example, including at least the arrangement information on the recording medium of the divided data recorded on the recording medium, used for salvage processing for reflecting the divided data that is not reflected in the file system to the file system) The generation unit (for example, salvage marker generation unit 21 in FIG. 7) that generates the salvage marker) and the divided data and the marker are recorded on the recording medium so that the divided data and the marker are arranged in a predetermined order on the recording medium. Recording means (for example, the pickup unit 113 in FIG. 7 that performs the process of step S5 in FIG. 10), and a mark on the recording medium. Holding means (e.g., non-volatile memory of FIG. 7) for holding location information for viewing including the generation means accumulates the placement information on the recording medium of the divided data recorded on the recording medium, it generates a marker In this case, a marker whose data size has reached a predetermined upper limit is designated as a key marker (for example, a salvage marker) .

  The recording apparatus according to claim 7 is a reading unit that reads a marker from the recording medium based on the marker arrangement information held by the holding unit (for example, the pickup unit 113 in FIG. 7 that performs the process of step S93 in FIG. 23). ) And salvage means for executing salvage processing based on the marker read by the reading means (for example, the control unit 120 in FIG. 7 that performs the processing in step S94 in FIG. 23).

The recording method according to claim 6 is recorded on a recording medium (for example, optical disc 111) for each of a plurality of divided data (for example, annual ring data) constituting one file, but is reflected in the file system. A generation step (for example, a salvage marker) used for salvage processing for reflecting non-divided data in the file system, including at least arrangement information on the recording medium of the divided data recorded on the recording medium (for example, salvage marker) Step S3 in FIG. 10, a recording step for recording the divided data and the marker on the recording medium so that the divided data and the marker are arranged in a predetermined order on the recording medium (for example, step S5 in FIG. 10), holding step of holding arrangement information of the marker on the recording medium (e.g., step S6 in FIG. 10) and only contains raw The step accumulates the arrangement information of the divided data recorded on the recording medium on the recording medium, generates a marker, and selects the marker whose data size has reached a predetermined upper limit as a key marker (for example, salvage marker) It is specified to .

  The correspondence between the constituent elements described in the claims of the program of the present invention and the specific examples in the embodiments of the present invention is the same as that of the recording method of the present invention described above, and therefore the description thereof is omitted. .

  Embodiments of the present invention will be described below. The recording / reproducing apparatus records audio data and video data managed as files on an optical disc in accordance with a predetermined file system (for example, UDF (Universal Disc format)), and is called a salvage marker between the recorded data. Record information. For example, when the power supply is cut off due to the removal of the battery and the recording process is not normally completed, that is, when the data recorded on the optical disk is not registered in the file system as one file, After recovery, refer to this salvage marker to specify the recording position on the recording medium for the data recorded until the recording process is interrupted, and based on that, the recording process is interrupted. Register the file containing the recorded data in the file system. As a result, even when the recording process is not normally completed, it is possible to reproduce the data recorded on the recording medium before the recording process is interrupted. Hereinafter, such a series of processes is referred to as salvage.

  In order to confirm whether the file system is normally recorded on the optical disk, for example, when UDF (Universal Disk Format) is adopted as the file system, the LVID of the UDF recorded on the optical disk Refer to (Logical Volume Integrity Descriptor). LVID is a flag that indicates whether the file recorded on the optical disk is normally closed. If the file is normally closed and the file system is normally recorded, the LVID has a close flag. If the file is not closed and the file system is not recorded properly, the LVID is set with an open flag.

  FIG. 1 shows an example of area divisions provided on an optical disc on which audio data and video data are recorded by a recording / reproducing apparatus to which the present invention is applied.

  In the case of the example in FIG. 1, an inner peripheral FS recording area 1, a file recording area 2, and an outer peripheral FS recording area 3 are provided on the optical disc in order from the inner peripheral side.

  In the inner circumference FS recording area 1, information indicating what kind of file is recorded in the file recording area 2 and management information to be referred to when the file is read from the optical disk is recorded. . This management information may be referred to as a file system (FS). This management information is updated when a file is recorded in the file recording area 2, a recorded file is updated, or a recorded file is deleted.

  The file recording area 2 is further divided into a non-real time (NRT) area 11 and a real time (RT) area 12.

  In the non-real-time area 11, files that do not require real-time performance during playback, such as index files, disc information files, clip information files, non-real-time metadata files, etc. (all will be described later with reference to FIGS. 3 and 4). ) Is recorded.

  In the real-time area 12, files that require real-time properties, for example, audio data and video data constituting audio files and video files, respectively, are recorded.

  The same management information as that recorded in the inner FS recording area 1 is recorded in the outer FS recording area 3. Thus, by recording the same management information in the inner peripheral FS recording area 1 and the outer peripheral FS recording area 3, it is temporarily recorded in either the inner peripheral FS recording area 1 or the outer peripheral FS recording area 3. Even if the management information cannot be read due to scratches, dirt, etc. on the optical disk, there is a possibility that the management information recorded on the other side can be read, so it is recorded in the file recording area 2. Occurrence of a situation where various files cannot be read can be suppressed.

  Next, an outline of recording of audio data and video data in the real-time area 12 of the optical disc will be described with reference to FIG.

  In FIG. 2A, one frame of video data V and audio data A accompanying the one frame of video data V are alternately arranged. Hereinafter, this recording method is referred to as an interleaving method in units of frames. Called.

  In FIG. 2B, the entire video data sequence and the entire audio data sequence are separately arranged as one file, and this recording method will be referred to as a non-interleaved method as appropriate.

  In FIG. 2C, video data V having a size exceeding one frame but not the entire video data sequence and audio data A having a size exceeding one frame but not the entire audio data sequence are alternately displayed. Is arranged.

  Here, video data V and audio data A of a size exceeding the one frame but not the whole are alternately arranged and recorded from the inner periphery to the outer periphery (or the opposite direction) of the optical disk. In this case, if the recording portion of the video data V and the recording portion of the audio data A are given different shades or colors, for example, the recording portion of the video data V and the recording portion of the audio data A are It looks like an annual ring formed on the cross section of the trunk of the tree.

  Accordingly, video data V, audio data A, and the like that exceed one frame but are not the entire size are hereinafter referred to as annual ring data as appropriate. Further, as shown in FIG. 2C, a recording method for periodically arranging and recording a plurality of data series such as video data V and audio data A in an annual ring data unit is hereinafter referred to as an interleaving method in an annual ring unit. Called.

  In the interleaving method in units of frames shown in FIG. 2A, video data V and audio data A for one frame are alternately written on the optical disk. Therefore, at least video data V or audio data A for one frame is written. This can be done if there is a buffer that can be buffered. Since this buffer is sufficient to store video data V or audio data A for one frame, a delay (recording delay) caused by buffering video data V or audio data A in the buffer is also possible. Can be shortened.

  However, in the interleave method in units of frames, since one frame of video data V and audio data A are alternately recorded on the optical disk, for example, so-called AV in which only one of video and audio is edited. (Audio Video) Even when split editing is performed, both video data V and audio data A are read, making it difficult to efficiently read data from the optical disk.

  That is, for example, when editing only video, only video data V needs to be read. However, when only video data V is read from an optical disc recorded in an interleaved manner in units of frames, one frame of video is read. It is necessary to read the data V, then seek to the recording position of the video data V of the next one frame, and repeat the reading. However, in the interleave method in units of frames, one frame of audio data A is recorded from the recording position of one frame of video data V to the recording position of the next one frame of video data V. When the read time for reading such a small amount of audio data A is compared with the seek time for performing a seek for skipping the audio data A, the read time is generally shorter than the seek time. . Therefore, it takes less time to read the entire video data V and audio data A than to read only the video data V from the optical disk. However, it is difficult to say that it is efficient to read audio data that is not an object of editing.

  On the other hand, in the non-interleaved method of FIG. 2B, the entire video data sequence and the entire audio data sequence are separately arranged and recorded on the optical disc. Therefore, when performing AV split editing, Only the person to be edited can be read efficiently.

  However, in the method without interleaving, the entire video data sequence and the entire audio data sequence are separately arranged and recorded on the optical disk, that is, for example, the recording area of the optical disk is a group of the video area and audio. Since the video data is recorded in the video area and the audio data is recorded in the audio area, the data is written to the optical disc from the inner circumference toward the outer circumference in the manner of one-stroke writing. In some cases, an enormous size buffer that can buffer the entire video data sequence or the entire audio data sequence is required. In addition, the delay (recording delay) caused by buffering video data or audio data in this enormous size buffer becomes very long.

  Therefore, in a method without interleaving, there is a method of alternately writing video data to the video area of the optical disc and writing audio data to the audio area in a time division manner.

  However, in this case, the disk drive pickup (both not shown) frequently seeks to move from the video area to the audio area of the optical disk and vice versa, thereby significantly reducing the effective recording rate. become. Further, when the recording / reproducing apparatus is a digital video camera, it is desirable to avoid a seek operation as much as possible from the viewpoint of impact.

  Therefore, in the interleave method in units of annual rings in FIG. 2C, video data and audio data are alternately arranged and recorded in units of annual ring data. As described above, the size of the annual ring data exceeds one frame, but is not the whole size. However, in terms of mounting, it is desirable that the size satisfies the following first and second conditions.

  That is, as a first condition, when comparing the time for reading the annual ring data from the optical disc and the seek time required for seeking to skip the recording area of the annual ring data, the seek time is: If the reading time is shorter than the reading time, that is, if reading is faster than skipping the annual ring data, it is not different from adopting the interleave method (FIG. 2A) in units of frames. , It is required to skip the reading. Preferably, the seek time is sufficiently shorter than the read time.

  As a second condition, it is required that the size of the annual ring data is such that there is a realistic size buffer for buffering the annual ring data. That is, in the interleave method in units of annual rings, video data V and audio data A are alternately arranged and recorded in units of annual ring data. Therefore, at the time of recording, at least video data V or audio data A in units of annual ring data is recorded. Need a buffer to buffer Therefore, unless there is actually a buffer capable of buffering video data V or audio data A in annual ring data units, data cannot be recorded by an interleave method in annual ring units. As described above, it is required that a buffer having a realistic size for buffering annual ring data exists.

  While the annual ring data is buffered in the buffer, the buffered annual ring data cannot be recorded on the optical disc, and a delay (recording delay) occurs due to buffering of the annual ring data in the buffer. The delay time corresponds to the size of the annual ring data stored in the buffer, that is, the size of the buffer. Therefore, for example, when the delay time due to buffering of the annual ring data in the buffer is limited due to the system design, the buffer size is set to the delay time due to buffering of the annual ring data within the limited time. Must be within the range.

  The first condition requires that the size of annual ring data be as large as possible, whereas the second condition requires that the size of annual ring data be as small as possible. The first and second conditions are contradictory.

  By the way, in order to satisfy the first condition that the seek time for performing the seek for skipping the annual ring data is shorter than the read time for reading the annual ring data, the annual ring data generally straddles a plurality of tracks of the optical disk. That is, the size of the annual ring data needs to be larger than one track of the optical disk. In order to make the seek time for the annual ring data sufficiently shorter than the read time, the size of the annual ring data generally needs to be several tracks of the optical disk. The size of one track is about several hundred KB (kilobytes) although it depends on the radial position of the track.

  Next, regarding the second condition that there is a buffer of a realistic size for buffering annual ring data, the upper limit of the practical size of the buffer is currently, for example, about several tens of megabytes (MB). is there.

  Accordingly, the size of the annual ring data is roughly, but it is appropriate to set it to several MB to several tens MB. This size roughly corresponds to about several tens of tracks on the disk. Here, since the state of the recording area of the optical disk in which the video data V and the audio data A are alternately written at this size is similar to the tree ring, the data of the size is used as described above. I will call it. The annual ring data may include data other than AV data.

  Next, the relationship between annual ring data and salvage markers will be described with reference to FIGS.

  FIG. 3 shows an example of the data recording order. In FIG. 3, “SA # 1”, “SA # 2”, and “SA # 3” indicate salvage markers. “A # 1”, “A # 2”, and “A # 3” indicate audio data. “V # 1” and “V # 2” indicate video data. Note that # 1, # 2, etc. are codes for identifying annual rings.

  In FIG. 3, in order from the left, salvage marker SM # 1, audio data A # 1, video data V # 1, salvage marker SM # 2, audio data A # 2, video data V # 2, salvage marker SM # 3 and audio data A # 3 are recorded. That is, one salvage marker is recorded corresponding to each annual ring data.

  The salvage marker includes a recognition pattern indicating that this data is a salvage marker (hereinafter, a recognition pattern indicating that it is a salvage marker is referred to as a salvage ID), and identification information for specifying a file to which the data belongs (for example, File name) etc. are included. The recording / reproducing apparatus can detect the salvage marker by searching for the salvage ID from the data read from the real-time area 12. Details of the information included in the salvage marker will be described later with reference to FIG.

  When detecting the insertion of an optical disc that has been interrupted halfway without completing the recording process, the recording / reproducing apparatus searches for the salvage ID on the optical disc. For example, when the salvage ID included in the salvage marker SM # 1 is detected, the recording / reproducing apparatus reads the salvage marker SM # 1 recorded at the position of the salvage ID. Then, the recording / reproducing apparatus records subsequent to the salvage marker SM # 1 based on identification information (for example, the file name X) for specifying the file included in the salvage marker SM # 1. It is determined that the audio data A # 1 and the video data V # 1 are data constituting the file X.

  Further, when the salvage ID is subsequently searched and the salvage ID included in the salvage marker SM # 2 is detected, the identification information for identifying the file included in the salvage marker SM # 2 (similarly Based on the file name X), it is determined that the audio data A # 2 and video data V # 2 recorded after the salvage marker SM # 2 are data constituting the file X.

  In the same manner, the salvage marker is read out and data included in the file X is specified. By following the salvage markers in this way, the recorded audio data and video data that are not reflected in the file system as files are searched and finally detected. A file X including audio data and video data is registered in the file system as one file.

  FIG. 4 shows the state of the recording position at the moment when the recording process is interrupted. 4, salvage marker SM # 3, audio data A # 3, video data V # 3, salvage marker SM # 4, and audio data A # 4 are recorded from the left in the same order as in FIG. However, recording of the video data V # 4 is interrupted at the position indicated by the “recording interruption point” arrow in the middle of the video data V # 4 on the right side. Of course, the salvage marker SM # 5 to be recorded behind this is not recorded on the recording medium.

  In the vicinity of such a recording interruption point, the audio data A # 3 and video data V # 3 recorded between the salvage markers SM # 3 and SA # 4 should be adopted as part of the data included in the file. However, data after salvage marker SM # 4 is not adopted. Therefore, one file is created with data prior to the salvage marker SM # 4.

  Note that up to the middle of audio data A # 4 and video data V # 5 after salvage marker SM # 4 may be employed. However, in this case, when a salvaged file is played back, the video may be distorted or not displayed near the end of the file. In such a case, the user only needs to cut and edit the data just before the video is distorted or not displayed, and in that case, the file including all the data recorded up to immediately before the recording interruption point is saved. Can be created.

  In the description of FIGS. 3 and 4, the audio data and the video data are included in the same file as an example. However, the audio data and the video data may be included in different files. Good. In that case, after the recording is interrupted as shown in FIG. 4, the audio data and the video data detected by following the salvage marker are registered in the file system as separate files. In the following description, it is assumed that audio data and video data are managed as separate files.

  Next, FIGS. 3 and 4 show the directory structure when data recorded in the file recording area 2 of the optical disc is managed as a file.

  As shown in FIG. 5, a PROAV directory 32 is provided immediately below the root directory (ROOT) 31. Under this PROAV directory 32, video data, audio data, editing data thereof, and other data are stored directly or with a directory.

  In the PROAV directory 32, a disc metafile (DISCMETA.XML) 41 (corresponding to program metadata), which is a file including titles and comments for all data recorded on the optical disc, and all of the data recorded on the optical disc are recorded. An index file (INDEX.XML) 42 and an index file (INDEX.BUP) 43 including management information for managing clips and edit lists are provided. The index file 43 is a copy of the index file 42, and the reliability is improved by preparing two files.

  Further, the PROAV directory 32 is metadata for the entire data recorded on the optical disc, and is, for example, a disc information file (DISCINFO.XML) which is a file containing information such as disc attributes, playback start position, disc recording prohibition, etc. ) 44 and a disc information file (DISKINFO.BUP) 45 are provided. The disc information file 45 is a duplicate of the disc information file 44, and the reliability is improved by preparing two files.

  In addition to the above-described files, the PROAV directory 32 includes a clip root directory (CLPR) 33 in which clip data is provided in a lower directory, and an edit list root directory in which edit list data is provided in a lower directory. (EDTR) 34 is provided.

  In the clip root directory 33, the clip data recorded on the optical disc is managed separately for each clip. For example, in the case of FIG. 5, the data of three clips is the clip directory (C0001). 51, a clip directory (C0002) 52, and a clip directory (C0003) 53.

  Here, the clip is a unit of the number of imaging processes. In addition, the clip indicates a unit indicating the time from the start of imaging to the end of imaging of the imaging process, a unit indicating the length of various data obtained by the imaging process, or the imaging A unit indicating the data amount of various data obtained by processing is indicated. Furthermore, the clip may also indicate the collection of various data itself.

  In the edit list root directory 34, an edit list (editing information indicating editing contents when a clip is edited) recorded on the optical disc is managed separately for each editing process. For example, in the case of FIG. 5, there are four edit lists: an edit list directory (E0001) 61, an edit list directory (E0002) 62, an edit list directory (E0003) 63, and an edit list directory (E0004) 64. They are managed separately in directories.

  In the directory below the clip directory 51 provided in the above-described clip root directory 33, each piece of data of the clip recorded on the optical disc is provided and managed as a file as shown in FIG.

  In the case of FIG. 6, the clip directory 51 includes a clip information file (C0001C01.SMI) 81 that is a file for managing this clip, and a video data file (C0001V01.MXF) 82 that is a file composed of video data of this clip. , Audio data files (C0001A01.MXF to C0001A08.MXF) 83 to 90 which are eight files composed of audio data of each channel of this clip, low resolution data corresponding to the video data of this clip (the same material as the video data) And a low resolution data file (C0001S01.MXF) 91, which is a file including a lower resolution than the video data and a data amount smaller than the video data, and corresponds to the essence data of this clip For example, LTC (Linear Time Code) and frame Such as the conversion table to associate the item, non-real-time metadata file (C0001M01.XML) 92 is provided is a file containing the clip metadata is metadata do not need to be in real time.

  Further, in the clip directory 51, a frame metadata file (C0001R01.BIM) 93 corresponding to the essence data of this clip, for example, a file including frame metadata which is metadata requiring real-time property, such as LTC. In addition, a picture pointer file (C0001I01.PPF) that is a file in which the frame structure of the video data file 82 (for example, information on the compression format for each picture in MPEG or the like, information on the offset address from the beginning of the file, etc.) is described. ) 94 etc. files are provided.

  Among the files shown in FIGS. 5 and 6, for example, the disk metafile 41, index files 42 and 43, disk information files 44 and 45, and clip directory 51 in the PROAV directory 32 are files for managing this clip. The data constituting the files that do not require real-time properties, such as the clip information file 81 and the non-real-time metadata file 92, are recorded in the non-real-time area 11 provided on the optical disc.

  Other data constituting the files requiring real-time properties such as the video data file 82, the audio data files 83 to 90, the frame metadata file 93, and the picture pointer file 94 in the clip directory 51 are provided on the optical disc. It is recorded in the real-time area 12.

  Next, FIG. 7 shows a configuration example of a recording / reproducing apparatus to which the present invention is applied. In this recording / reproducing apparatus 110, the spindle motor 112 causes the optical disk 111 to have a constant linear velocity (CLV (Constant Linear Velocity)) or a constant angular velocity (CAV (Constant Angular Velocity)) based on a spindle motor drive signal from the servo controller 115. ) And so on.

  During recording, the pickup unit 113 controls the output of the laser beam based on the recording signal supplied from the signal processing unit 116 and records the recording signal on the optical disc 111. During reproduction, the optical disk 111 is irradiated with laser light, and the reflected light from the optical disk 111 is photoelectrically converted to generate a current signal, which is supplied to the RF amplifier 114. Note that the irradiation position of the laser beam is controlled by a servo signal supplied from the servo control unit 115 to the pickup unit 113.

  The RF amplifier 114 generates a focus error signal, a tracking error signal, and a reproduction signal based on the current signal from the pickup unit 113, supplies the tracking error signal and the focus error signal to the servo control unit 115, and outputs the reproduction signal. The signal processing unit 116 is supplied.

  The servo control unit 115 performs a focus servo operation and a tracking servo operation. Specifically, the servo control unit 115 generates a focus servo signal or tracking servo signal based on the focus error signal and tracking error signal from the RF amplifier 114 and supplies the focus servo signal or tracking servo signal to an actuator (not shown) of the pickup unit 13. . The servo control unit 115 generates a spindle motor drive signal for driving the spindle motor 112 and performs a spindle servo operation for controlling the optical disk 111 at a desired rotation speed.

  Further, the servo control unit 115 performs thread control for moving the pickup unit 113 in the radial direction of the optical disc 111 to change the irradiation position of the laser beam. The signal reading position of the optical disc 111 is set by the control unit 120, and the position of the pickup unit 113 is controlled so that a signal can be read from the set reading position.

  The signal processing unit 116 modulates audio data, video data, and other data to be recorded on the optical disc 111 and the salvage marker input from the memory controller 117, generates a recording signal, and supplies the recording signal to the pickup unit 113. . The signal processing unit 116 also demodulates the reproduction signal input from the RF amplifier 114 to generate reproduction data, and supplies the reproduction data to the memory controller 117.

  The memory controller 117 appropriately inputs the audio data, video data, and other data to be recorded on the optical disc 111 and the salvage marker generated by the salvage marker generation unit 121, which are input from the data conversion unit 119, and the memory 118. Are buffered, read out, and supplied to the signal processing unit 116. The memory controller 117 also extracts audio data, video data, and other data included in the reproduction data from the signal processing unit 116, buffers the data in the memory 118 as appropriate, and reads out the data to read out the data conversion unit 119. To supply. Further, the memory controller 117 extracts the salvage marker included in the reproduction data from the signal processing unit 116, stores it in the memory 118 as appropriate, reads it, and supplies it to the control unit 120.

  The data conversion unit 119 receives video and audio signals supplied from the signal input / output device 141 and acquired from a video camera (not shown), and video and audio reproduced from an arbitrary recording medium (not shown). The signal or the like is encoded based on a method such as MPEG (Moving Picture Experts Group) or JPEG (Joint Photographic Experts Group), and the resulting audio data and video data are supplied to the memory controller 117. Note that the data conversion unit 119 is not necessarily provided.

  The data conversion unit 119 also decodes audio data and video data included in the reproduction data supplied from the memory controller 117, and converts the resulting video and audio signals into output signals of a predetermined format. The signal is converted and supplied to the signal input / output device 141.

  The control unit 120 controls the servo control unit 115, the signal processing unit 116, the memory controller 117, the data conversion unit 119, and the salvage marker generation unit 121, and performs a recording process, a reproduction process, and a salvage process (while being recorded on the optical disc 111). Also, a process for reflecting the audio data and video data not reflected in the file system to the file system based on the salvage marker is executed. In addition, the control unit 120 generates nonvolatile memory holding information to be held in the nonvolatile memory 122.

The salvage marker generation unit 121 generates a salvage marker and supplies it to the memory controller 117. Salvage marker generator 121, may have been remembers in a memory-chip salvage marker created. The nonvolatile memory 122 stores nonvolatile memory holding information generated by the control unit 120.

The allocation manager 13 1 which is incorporated in the control unit 120, the recording position of each data in the optical disk 111, for managing the reproduction position, and the like. Incidentally, salvage marker generator 121 also, similar to the allocation manager 13 1, may be incorporated in the control unit 120.

  Although not shown, the recording / reproducing apparatus 110 includes a disk insertion / ejection motor that is driven when the optical disk 111 is inserted and ejected, a display unit that displays the operation status and various guidance of the recording / reproducing apparatus 110, and a user. An operation unit that receives an input of the operation may also be provided.

  Next, information included in the salvage marker will be described with reference to FIG. FIG. 8 shows an example of information included in the salvage marker corresponding to annual ring #n.

  Information included in the salvage marker is classified into management data and storage data. The management data includes a salvage marker ID, an increment number, a recording date and time, a next salvage marker pointer, a key salvage marker pointer, a UMID (Unique Material ID), and a storage data header.

  The salvage marker ID is information for identifying that the data is a salvage marker, and is used for detecting the salvage marker. The increment number is information including, for example, a serial number or the like for indicating continuity with other salvage markers adjacent to each other with audio data and video data interposed therebetween. The increment number of the salvage marker shown in FIG. 8 is #n.

  The recording date and time is information indicating the date and time when the salvage marker is recorded, and is intended to prevent data that is intentionally deleted by the user from being accidentally subjected to full salvage. However, instead of the recording date and time, only one of the date and time may be used, or other data that can specify the recorded timing may be used.

  The next salvage marker pointer is arrangement information (plan) indicating a position where a salvage marker SM # (n + 1) next to the salvage marker SM # n is to be recorded. The key salvage marker pointer is arrangement information (actual result) indicating a position where a key salvage marker (described later) recorded on the optical disc 111 is recorded. Note that a predetermined number (for example, 100) of key salvage marker pointers can be accumulated.

  The UMID is information for uniquely identifying the audio data and video data of the corresponding annual ring #n. The stored data header is information indicating that subsequent data is stored data of the salvage marker.

  Salvage marker storage data is classified into file data and file system management data. The file data includes program metadata which is a non-real-time file corresponding to audio data and video data of annual rings # (n + 1), # (n + 2),... Following the annual ring #n corresponding to the salvage marker SM # n. , Additional index file entries, clip information, and non-real-time metadata. For data other than the index file, only the additional data may be recorded in the storage data.

  The salvage marker storage data corresponds to the program metadata file 41, the index file 42, the clip information 81, and the non-real-time metadata 92 described with reference to FIGS.

  The file system management data includes a file entry, annual ring arrangement information, and a defect list.

  The file entry is identification information for identifying a file restored based on the salvage marker, and is, for example, a file name. As the annual ring arrangement information, audio data and video data of annual ring # (n-2), annual ring # (n-3),... Up to the second annual ring of annual ring #n corresponding to the salvage marker SM # n are recorded. The position is indicated. The defect list is information indicating a position where a defect has occurred when annual ring data was recorded.

  However, the arrangement information of the annual ring data is the annual ring data recorded in the salvage marker SM # (n−1) one year before the annual ring data unless the upper limit (for example, 64 kilobytes) of the size provided in the salvage marker is exceeded. The arrangement information of the annual ring data # (n-2) before the second annual ring can be accumulated and held in the arrangement information of the second annual ring, but the arrangement information of the annual ring data # (n-2) before the second annual ring should be accumulated. Therefore, if the total size of the salvage marker exceeds the upper limit, only the annual ring data # (n-2) before the 2nd annual ring is retained.

  Note that a salvage marker in which the arrangement information of annual ring data up to the second annual ring is accumulated to the maximum is specified as the key salvage marker in a range where the overall size of the salvage marker does not exceed the upper limit.

  Next, non-volatile memory holding information held in the non-volatile memory 122 will be described with reference to FIG. FIG. 9 shows an example of information included in the nonvolatile memory holding information.

  Nonvolatile memory retention information is classified into management data and storage data. The management data includes an update date / time, an index ID, and a storage data header.

  The update date / time is information indicating the latest date / time when the nonvolatile memory holding information is recorded or updated. The index ID is unique information for uniquely identifying the optical disc 111 attached to the recording / reproducing apparatus 110 when the nonvolatile memory holding information is recorded. For example, the index ID is given when the optical disc 111 is formatted. Use the information that you have. The storage data header is information indicating that the subsequent data is storage data of nonvolatile memory holding information.

  The stored data of the nonvolatile memory holding information includes the current salvage marker pointer, the key salvage marker pointer, the arrangement information of the annual rings not recorded on the salvage marker on the disc, and the recorded annual ring information.

  The current salvage marker pointer is information indicating a position where the latest salvage marker recorded in the optical disc 111 is recorded. The key salvage marker pointer is information indicating a position where a recorded key salvage marker is recorded on the optical disc 111. Note that a predetermined number (for example, 100) of key salvage marker pointers can be accumulated. As the arrangement information of annual rings that are not recorded on the salvage marker on the disc, the information that is not recorded on the optical disc 111 in the state of being included in the salvage marker is recorded. The recorded annual ring information is information for identifying the latest annual ring data recorded on the optical disc 111.

  Next, a process for recording audio data and video data on the optical disc 111 by the recording / reproducing apparatus 110 (hereinafter simply referred to as a recording process) will be described with reference to FIG. The process starts when an audio signal and a video signal are supplied from the signal input / output device 141.

  In step S1, the data conversion unit 119 starts a process of compressing the audio signal and the image signal supplied from the signal input / output device 141 according to the control from the control unit 120, and the audio data and video data obtained as a result thereof. Is output to the memory controller 117. The memory controller 117 starts buffering of the audio data and video data input from the data conversion unit 19 into the memory 118 in accordance with control from the control unit 120.

In step S2, the control unit 20 initializes a parameter n used for identification of annual rings to 1. In step S3, the salvage marker generation unit 121 generates a salvage marker SM # n corresponding to the annual ring #n. The processing of the step S 3, will be described in detail with reference to the flowchart of FIG. 11.

  In step S <b> 21, the salvage marker generation unit 121 acquires the previously created salvage marker SM # (n−1) as a model of the salvage marker from the built-in memory. Thereafter, the salvage marker SM # n is created by updating the information included in the salvage marker template. If the previously created salvage marker SM # (n-1) does not exist, a default template stored in the built-in memory is obtained instead.

  Further, without executing the process of step S21, the process after step S22 may be performed by updating the model on the memory built in the salvage marker generation unit 121.

  In step S <b> 22, the salvage marker generation unit 121 updates the model recording date and time to the current date and increments the increment number by one.

  In step S23, the salvage marker generation unit 121 changes the template next salvage marker pointer to the arrangement information (schedule) of the next salvage marker SM # (n + 1). The arrangement information (plan) is calculated based on the fact that the sizes of the salvage marker and the annual ring data are substantially constant.

  In step S24, the salvage marker generation unit 121 has previously designated the salvage marker SM # (n-1) as the key salvage marker in the process of creating the salvage marker SM # (n-1), The arrangement information (actual result) of the salvage marker SM # (n-1) is acquired from the allocation manager 131 and added to the model key salvage marker pointer.

  In step S25, the salvage marker generation unit 121 acquires NRT metadata corresponding to the audio data and video data of the next annual ring # (n + 1) (for example, from the control unit 120), and converts it into the template file data. Overwrite.

  In step S <b> 26, the salvage marker generation unit 121 acquires the arrangement information (actual result) of audio data and video data of the previous annual ring # (n−2) from the allocation manager 131.

  In step S27, the salvage marker generation unit 121 adds the audio data and video data arrangement information (actual results) of annual ring # (n-2) acquired in the process of step S26 to the annual ring arrangement information of the model. It is determined whether the size of the generated salvage marker SM # n exceeds a predetermined threshold (upper limit value, for example, 64 kilobytes).

  If it is determined in step S27 that the size of the generated salvage marker SM # n does not exceed the predetermined threshold, the process proceeds to step S28. In step S28, the salvage marker generating unit 121 adds the arrangement information (actual result) of the audio data and video data of the annual ring # (n-2) acquired in the process of step S26 to the arrangement information of the model annual rings.

  In step S29, the salvage marker generating unit 121 further adds the audio data and video data arrangement information (actual results) for one annual ring to the template annual ring arrangement information, and the generated salvage marker SM # n. It is determined whether the size exceeds a predetermined threshold. If it is determined that the size of the generated salvage marker SM # n exceeds a predetermined threshold, the salvage marker generating unit 121 proceeds to step S30 and designates the generated salvage marker SM # n as a key salvage marker. To do.

  In step S <b> 30, the salvage marker generation unit 121 appropriately updates other information on the model, completes the salvage marker SM # n, and outputs the generated salvage marker SM # n to the memory controller 117. However, the template file entry is the same from the start to the end of the recording process, and when the next recording process is started, a file entry different from the current one is generated. Thereby, annual rings constituting the same file are identified.

If it is determined in step S29 that the size of the generated salvage marker SM # n does not exceed a predetermined threshold, the process of step S30 is skipped.

  If it is determined in step S27 that the size of the generated salvage marker SM # n exceeds a predetermined threshold, the process proceeds to step S32. In step S32, the salvage marker generating unit 121 deletes the arrangement information (actual results) of the audio data and video data before the annual ring # (n-1) recorded in the template, and acquired in the process of step S26. Only the arrangement information (actual result) of the audio data and video data of the annual ring # (n-2) is recorded in the arrangement information of the model annual ring. Thereafter, the process proceeds to step S31.

  This is the end of the description of the salvage marker generation process corresponding to annual ring #n.

  Returning to the description of FIG. After the salvage marker SM # n is generated in the process of step S3, in step S4, the memory controller 117 monitors the memory 118 according to the control of the control unit 120, and the audio data and video for one year ring are stored in the memory 118. It is determined whether or not the data is buffered, and waits until it is determined that the audio data and video data for the annual ring are buffered. Then, when the audio data and video data for one annual ring are buffered in the memory 118, the process proceeds to step S5. In addition, you may perform the process of step S3 and step S4 in parallel.

  In step S <b> 5, the memory controller 117 receives the salvage marker SM # n input from the salvage marker generation unit 121 and the audio data and video data of the annual ring #n buffered in the memory 118 in accordance with control from the control unit 120. The signal processing unit 116 is supplied. Hereinafter, the audio data and video data of annual ring #n are described as audio data A # n and video data V # n, respectively. Both are also described as AV data #n.

  The signal processing unit 116 modulates the supplied salvage marker SM # n, audio data A # n, and video data V # n into a recording signal in this order, and supplies the recording signal to the pickup unit 113. The pickup unit 113 records the recording signal input from the signal processing unit 116 on the optical disc 111.

  In step S <b> 6, the control unit 120 updates the nonvolatile memory holding information in the nonvolatile memory 122. If there is no non-volatile memory holding information on the non-volatile memory 122, the non-volatile memory holding information is newly generated in the same manner as the update of the non-volatile memory holding information described below.

  Specifically, the recording date / time of the management data of the nonvolatile memory holding information is updated to the current date / time, and the current salvage marker pointer of the stored data is set to the salvage marker SM # n recorded on the optical disc 111 in the process of step S5. Update with placement information (actual). Furthermore, if the salvage marker SM # n generated in the process of step S3 is designated as the key salvage marker in the process of step S30, the salvage marker SM that is a key salvage marker is displayed in the key salvage marker pointer of the stored data. Add #n placement information (actual result). In addition, in the stored data “arrangement information of annual rings not recorded in the salvage marker on the disc”, the arrangement information (actual result) of the AV data #n of the annual ring #n and the AV data # (n of the annual ring # (n−1)) -1) arrangement information (actual result) is recorded.

In step S <b> 7, the memory controller 117 determines whether audio data and video data that are not output to the signal processing unit 116 are buffered in the memory 118, and notifies the control unit 120 of the determination result. The control unit 120 determines whether or not to end the recording process based on the determination result from the memory controller 117. Specifically, if the audio data and video data is not output to the signal processing unit 116 is buffered in memory 118, it is determined not to end the recording process, the process proceeds to step S 8, the parameter n Is incremented by 1, the process returns to step S3, and the subsequent processing is repeated.

  In step S7, when the audio data and video data not output to the signal processing unit 116 are not buffered in the memory 118, it is determined that the recording process is finished, and the process proceeds to step S9.

  In step S9, the control unit 120 creates a file system (management information) for managing the salvage marker, audio data, and video data recorded on the optical disc 111 by the process of step S5 as a file, and uses this as a signal processing unit. 116, the file system (management information) recorded in at least one of the inner circumference FS recording area 1 and the outer circumference FS recording area 3 of the optical disc 111 is updated, and the file system is normally closed. To record. For example, when the file system is a UDF, a close flag is set in the LVID (Logical Volume Integrity Descriptor) of the UDF. Further, the control unit 120 erases the nonvolatile memory holding information on the nonvolatile memory 122. This is the end of the description of the recording process.

  The above description is an object of the present invention to cope with a case where the recording process is normally terminated and this recording process is not terminated normally and is interrupted.

  Next, the above-described recording process will be described more specifically. 12 to 20 show the main part of the non-volatile memory holding information held in the non-volatile memory 122, the recorded data reflected in the file system (management information), and the status of data recording on the real-time area 12 of the optical disc 111. , And changes in main information included in the salvage marker are shown in time series.

  FIG. 12 shows a state before the recording process is started. At this time, nothing is recorded in the nonvolatile memory 122. Data already recorded on the optical disk 111 exists, and the data is already reflected in the file system.

  FIG. 13 shows a state where salvage marker SM # 1 and AV data # 1 corresponding to annual ring # 1 are about to be recorded on optical disc 111. The unrecorded salvage marker SM # 1 includes the arrangement information (plan) of the salvage marker SM # 2 as the next salvage marker pointer.

  FIG. 14 shows that salvage marker SM # 1 and AV data # 1 corresponding to annual ring # 1 are partly recorded on optical disc 111, and salvage marker SM # 2 and AV data # 2 corresponding to annual ring # 2 are recorded on optical disc 111. Is in a state of being recorded. The unrecorded salvage marker SM # 2 includes the arrangement information (plan) of the salvage marker SM # 3 as the next salvage marker pointer.

  In FIG. 15, the recording of the AV data # 1 corresponding to the annual ring # 1 on the optical disc 111 is completed, and further, the salvage marker SM # 2 corresponding to the annual ring # 2 and a part of the AV data # 2 are recorded on the optical disc 111. The salvage marker SM # 3 and the AV data # 3 corresponding to the annual ring # 3 are about to be recorded on the optical disc 111. The unrecorded salvage marker SM # 3 includes, as the next salvage marker pointer, arrangement information (planned) of the salvage marker SM # 4 and arrangement information (actual result) of the annual ring # 1 before the second annual ring. Note that the salvage marker SM # 3 including the arrangement information (actual result) of the annual ring # 1 that has been recorded has not been recorded, and therefore the arrangement information (actual result) of the annual ring # 1 before the second annual ring is included in the nonvolatile memory holding information. To be recorded.

In FIG. 16, the recording of the AV data # 2 corresponding to the annual ring # 2 on the optical disc 111 is finished, and further, the salvage marker SM # 3 corresponding to the annual ring # 3 and a part of the AV data # 3 are recorded on the optical disc 111. The salvage marker SM # 4 and the AV data # 4 corresponding to the annual ring # 4 are about to be recorded on the optical disc 111. The unrecorded salvage marker SM # 4 includes, as the next salvage marker pointer, arrangement information (planned) of the salvage marker SM # 5 and arrangement information (actual results) of the annual rings # 1 and # 2 before the second annual ring. ing. The salvage marker SM # 4 is designated as a key salvage marker because the data size approaches the upper limit at this stage. Note that the salvage marker SM # 4 including the arrangement information (actual result) of the annual ring # 2 that has been recorded has not been recorded, so the arrangement information (actual result) of the annual ring # 2 is recorded in the nonvolatile memory holding information.

  In FIG. 17, the recording of the AV data # 3 corresponding to the annual ring # 3 on the optical disc 111 is finished, and further, the salvage marker SM # 4 corresponding to the annual ring # 4 and a part of the AV data # 4 are recorded on the optical disc 111. The salvage marker SM # 5 and the AV data # 5 corresponding to the annual ring # 5 are about to be recorded on the optical disc 111. The unrecorded salvage marker SM # 5 includes the arrangement information (planned) of the salvage marker SM # 6 and the arrangement information (actual result) of the annual ring # 3 before the second annual ring as the next salvage marker pointer. Note that the salvage marker SM # 5 including the arrangement information (actual) of the annual ring # 3 that has been recorded is not recorded, so the arrangement information (actual) of the annual ring # 3 is recorded in the nonvolatile memory holding information. Furthermore, the arrangement information (actual result) of the salvage marker SM # 4 corresponding to the annual ring # 4 is recorded as the key salvage marker pointer. Furthermore, the arrangement information (actual record) of annual ring # 1 and annual ring # 2 included in key salvage marker SM # 4 is deleted from the nonvolatile memory holding information.

  In FIG. 18, the recording on the optical disc 111 up to the AV data # 6 corresponding to the annual ring # 6 is completed, and further, the salvage marker SM # 7 corresponding to the annual ring # 7 and a part of the AV data # 7 are recorded on the optical disc 111. The salvage marker SM # 8 and AV data # 8 corresponding to the annual ring # 8 are about to be recorded on the optical disc 111. The unrecorded salvage marker SM # 8 includes arrangement information (planned) of the salvage marker SM # 9 and arrangement information (actual result) of the annual ring # 6 before the second annual ring as the next salvage marker pointer. The salvage marker SM # 8 including the arrangement information (actual result) of the annual ring # 6 that has been recorded is not recorded, so the arrangement information (actual result) of the annual ring # 6 is recorded in the nonvolatile memory holding information. Further, the arrangement information (actual result) of the salvage marker SM # 7 corresponding to the annual ring # 7 is accumulated and recorded as the key salvage marker pointer. Further, the arrangement information (actual results) of the annual rings # 3 to # 5 included in the key salvage marker SM # 7 is deleted from the nonvolatile memory holding information.

  In FIG. 19, the recording on the optical disc 111 up to the AV data # 9 corresponding to the annual ring # 9 is completed, and further, the salvage marker SM # 10 corresponding to the annual ring # 10 and a part of the AV data # 10 are recorded on the optical disc 111. The salvage marker SM # 11 and AV data # 11 corresponding to the annual ring # 11 are in a state of being recorded on the optical disc 111. The unrecorded salvage marker SM # 11 includes, as the next salvage marker pointer, arrangement information (planned) of the salvage marker SM # 12 and arrangement information (actual result) of the annual ring # 9 before the second annual ring. Note that the salvage marker SM # 11 including the arrangement information (actual result) of the annual ring # 9 that has been recorded is not recorded, so the arrangement information (actual result) of the annual ring # 9 is recorded in the nonvolatile memory holding information. Further, the arrangement information (actual result) of the salvage marker SM # 10 corresponding to the annual ring # 10 is accumulated and recorded as a key salvage marker pointer. Further, the arrangement information (actual results) of the annual rings # 6 to # 8 included in the key salvage marker SM # 10 is deleted from the nonvolatile memory holding information.

  When the power supply is cut off immediately after the state shown in FIG. 19 due to the removal of the battery or the like, as shown in FIG. 20, the optical disk 111 includes AV data # 9 corresponding to the annual ring # 9 and the annual ring. Part of salvage marker SM # 10 and AV data # 10 corresponding to # 10 is recorded, and the non-volatile memory holding information includes annual ring # 4 as arrangement information (actual result) of annual ring # 9 and key salvage marker pointer. Arrangement information (actual results) of salvage markers SM # 4, # 7, and # 10 corresponding to # 7 and # 10, respectively, is accumulated and recorded.

  In the state shown in FIG. 20, although the salvage marker SM # 1 corresponding to the annual ring # 1 to a part of the AV data # 10 corresponding to the annual ring # 10 are recorded on the optical disc 111, the file system (management information) ) Is not reflected. Therefore, these data cannot be read at present. Therefore, a data recovery process described below is executed so that these data can be read.

  Next, disk response processing including data recovery processing will be described with reference to the flowchart of FIG. This disk response process is started when power supply to the recording / reproducing apparatus 110 is started.

  In step S51, the control unit 120 stands by until the optical disk 111 is inserted. When the optical disk 111 is inserted, the control unit 120 proceeds to step S52 and executes a recovery execution determination process. Here, the recovery execution determination process is an optical disk 111 in which the recording process has been interrupted before, and data recovery (data recorded before the recording process is interrupted as a file) This is a process for determining whether or not registration in the system is necessary.

  The restoration execution determination process in step S52 will be described with reference to the flowchart in FIG.

  In step S71, the control unit 120 controls the servo control unit 115 to refer to information indicating whether or not the file system (management information) recorded on the optical disc 11 is normally closed. For example, when the file system is UDF, LVID of UDF is referred. In step S72, the control unit 120 determines whether or not the information referred to in step S71 indicates that the file system (management information) is normally closed. If the file system is UDF, it is determined whether or not the close flag is set in LVID. If the close flag is not set, the process proceeds to step S73.

  In the file system, information such as a file name corresponding to data recorded on the optical disc 111 and a recording position of the data on the optical disc 111 are registered. If the recording process is interrupted, information such as the recording position of the data being recorded on the optical disk 111 and the file name corresponding to the data being recorded are not registered in the file system. Accordingly, the recording area in which data is recorded before the recording process is interrupted is registered as an empty area in which no data is recorded on the file system.

  Therefore, in step S73, the control unit 120 temporarily reserves the continuous free space in the allocation manager 31. The allocation manager 131 identifies an empty area in which no data is recorded in the recording area of the optical disc 111 based on the information regarding the recording position of the data registered in the file system, and temporarily assigns the data to the specified empty area. When recording, the order in which data is recorded from which position in which empty area is specified. In step S74, the control unit 120 controls the servo control unit 115 to detect the salvage ID in the free area reserved in the process of step S73, and reads the salvage marker including the detected salvage ID.

  In step S75, the control unit 120 determines whether or not the recording time included in the salvage marker is newer than the file system update date and time. When it is determined that the recording time information included in the salvage marker is newer than the file system update date and time, the process proceeds to step S76, and the control unit 120 determines that the recovery process is necessary. Thereafter, the processing proceeds to step S53 in FIG.

  If it is determined in step S72 that the close flag is set in the LVID referred to in step S71, the process proceeds to step S78.

  In step S78, the control unit 120 determines that the recovery process is not necessary. Thereafter, the processing proceeds to step S53 in FIG.

  If it is determined in step S75 that the recording time information included in the salvage marker is older than the file system update date and time, the process proceeds to step S77. In step S77, the control unit 120 controls the servo control unit 115 and the signal control unit 116 to display information indicating whether the file system (management information) recorded on the optical disc 111 is normally closed. Update to indicate that it was closed normally. Specifically, the close flag is set in the LVID of the UDF. Thereafter, the process proceeds to step S78.

  This is the end of the description of the recovery execution determination process. Returning to FIG.

  In step S53, the control unit 120 determines whether or not the determination result in the recovery execution determination process in step S52 is “data recovery is required”, and “data recovery is required”. If it is determined, the process proceeds to step S54.

  In step S54, the control unit 120 causes a display unit (not shown) to display a notification that prompts the user to select whether or not to perform data recovery processing (salvage processing). If it is determined in step S55 whether or not an operation for instructing execution of the data recovery process has been performed by the user in response to this notification, and it is determined that an operation for instructing execution of the data recovery process has been performed. In step S56, data recovery processing is executed.

  If it is determined in step S53 that “data recovery is necessary”, the process in step S54 may be omitted and the process in step S56 may be performed immediately.

  If it is determined in step S53 that the determination result in the recovery execution determination process in step S52 is “data recovery is necessary”, the processes in steps S54 to S56 are skipped. Even when it is determined in step S55 that the operation for instructing the execution of the data recovery process has not been performed (the instruction for not performing the data recovery process has been performed), the process of step S56 is skipped. The

  The data recovery process in step S56 will be described with reference to the flowchart in FIG. In step S <b> 91, the control unit 120 determines whether or not nonvolatile memory holding information exists in the nonvolatile memory 122. If it is determined that the nonvolatile memory holding information exists, the process proceeds to step S92.

  In step S92, the control unit 120 reads the index ID, which is identification information of the optical disc 111, from each of the nonvolatile memory holding information of the nonvolatile memory 122 and the file system of the optical disc 111, and determines whether or not they match. judge. If the recording process with respect to the optical disc 111 has been interrupted by the recording / reproducing apparatus 110, it is determined that the both match, and the process proceeds to step S93.

  In step S93, the control unit 120 sequentially reads and stores the key salvage markers from the optical disc 111 based on the key salvage marker pointers recorded in the nonvolatile memory holding information.

  For example, when the data recovery process is performed from the state shown in FIG. 20, as shown in FIG. 24, the key salvage markers SM # 4 and # 7 # 10 are based on the key salvage marker pointer of the nonvolatile memory holding information. Read out.

  At this time, since the key salvage markers are arranged in a jumping manner, the spindle motor 112 that rotates the optical disc 111 can be a CAV system. In this case, all the key salvage markers can be read out at a higher speed than the CLV method.

  In step S94, the control unit 120 updates the file system based on the arrangement information (actual result) of each annual ring recorded in the key salvage marker.

  For example, in the state of FIG. 24, arrangement information (actual) from key salvage marker SM # 4 to annual rings # 1 and # 2, arrangement information (actual) from annual saliva # 3 to # 5 from key salvage marker SM # 7, key Since arrangement information (actual results) of annual rings # 6 to # 8 is acquired from the salvage marker SM # 10 and arrangement information (actual results) of annual ring # 9 is acquired from the nonvolatile memory holding information, as shown in FIG. The system reflects the salvage markers and AV data of annual rings # 1 to # 9.

  If it is determined in step S91 that the nonvolatile memory holding information does not exist, the process proceeds to step S95.

  If it is determined in step S92 that the nonvolatile memory holding information does not match the respective index IDs of the file system of the optical disc 111, the process proceeds to step S95.

  In step S95, the control unit 120 detects salvage markers from the optical disc 111, and sequentially reads and stores them. Thereafter, the process proceeds to step S94. In step S94, the control unit 120 updates the file system based on the arrangement information (actual result) of each annual ring recorded in the salvage marker. In this case, since all the salvage markers are read out, it is difficult to apply the CAV method to the spindle motor 112. Therefore, the time required for reading becomes longer than when only the key salvage marker is read in the process of step S93.

  The salvage markers SM # 1 to # 9 record non-real-time file data corresponding to the annual ring # 10, so that the non-real-time file data corresponding to the annual ring # 10 is used. It is possible to record in the non-real time area 11 and reflect the recorded non-real time file data in the file system.

  This completes the data recovery process. The disk response process is also terminated.

  In step S55, if an operation for not recovering data is performed and the recovery process in step S56 is not executed, if the recording process described above is subsequently executed, the data that has not been recovered (file system New data is overwritten on top of (data not registered as a file). Therefore, the data that has not been recovered will be erased from the optical disc 111.

  As described above, according to the present invention, it is possible to recover data that was being recorded even if the recording did not end normally.

  In the above description, a case where the recording process, the recovery execution determination process, and the data recovery process are executed by the single recording / reproducing apparatus 110 has been described as an example. The salvage device that executes the recovery execution determination process and the data recovery process, and the playback device that plays back the optical disk may be different devices.

  That is, the recording process may be executed by a recording device that does not have a function of executing the recovery execution determination process and the data recovery process and a function of playing back the optical disc, or an optical disc recording process and a playback process are executed. The recovery execution determination process and the data recovery process may be executed by a salvage device that does not have the function to perform the above.

  The present invention can be applied to disc-shaped recording media other than optical discs and other randomly accessible recording media (for example, semiconductor memories). Furthermore, the present invention can be applied to recording data on any recording medium as long as it is managed as a file.

  In the above description, the case where content data such as audio data and video data and a file system (management data for managing content data) are recorded on the same recording medium has been described as an example. The present invention is also applicable when the system (management data) is not recorded on the same recording medium. For example, content data is recorded on a disk medium (or tape medium) out of package media in which a disk medium (or tape medium) and a semiconductor memory are stored in one cartridge, and a file system is recorded on the semiconductor memory. Good. Further, for example, content data may be held in one of two devices connected via a network, and a file system may be held in the other device. Of course, the present invention can also be applied to examples other than the above in which the content data and the file system (management data) are not recorded on the same recording medium.

  The series of processes described above can be realized by hardware, but can also be realized by software. When a series of processing is realized by software, a program constituting the software is installed in a computer, and the program is executed by the computer, whereby the above-described disc recording / reproducing apparatus 110 is functionally realized. The

  In the present specification, the steps for describing a program provided by a recording medium (program storage medium) are not necessarily processed in time series, as well as processes performed in time series in the described order. Both include processes executed in parallel or individually.

It is a figure which shows an example of the area division provided in the optical disk in which audio data and video data are recorded by the recording / reproducing apparatus to which this invention is applied. It is a figure for demonstrating annual ring data. It is a figure for demonstrating the relationship between annual ring data and a salvage marker. It is a figure for demonstrating the relationship between annual ring data and a salvage marker. It is a figure which shows the directory structure when the data recorded on the optical disk are managed as a file. It is a figure which shows the directory structure when the data recorded on the optical disk are managed as a file. It is a block diagram which shows the structural example of the recording / reproducing apparatus to which this invention is applied. It is a figure which shows an example of the information contained in a salvage marker. It is a figure which shows an example of the information contained in non-volatile memory holding information. It is a flowchart explaining a recording process. It is a flowchart explaining a salvage marker production | generation process. It is a figure for demonstrating a recording process concretely. It is a figure for demonstrating a recording process concretely. It is a figure for demonstrating a recording process concretely. It is a figure for demonstrating a recording process concretely. It is a figure for demonstrating a recording process concretely. It is a figure for demonstrating a recording process concretely. It is a figure for demonstrating a recording process concretely. It is a figure for demonstrating a recording process concretely. It is a figure for demonstrating a recording process concretely. It is a flowchart explaining a disk reception process. It is a flowchart explaining a recovery execution determination process. It is a flowchart explaining a disk restoration process. It is a figure for demonstrating a disk restoration process concretely. It is a figure for demonstrating a disk restoration process concretely.

Explanation of symbols

  110 recording / reproducing apparatus, 111 optical disk, 112 spindle motor, 113 pickup unit, 114 RF amplifier, 115 servo control unit, 116 signal processing unit, 117 memory controller, 118 memory, 119 data conversion unit, 120 control unit, 121 salvage marker generation Part, 122 non-volatile memory, 131 allocation manager, 141 signal input / output device

Claims (7)

In a recording apparatus that records data on a recording medium as a file, and also records on the recording medium a file system that indicates a correspondence relationship between identification information for identifying the file and a recording position of the file on the recording medium.
For each of a plurality of divided data constituting one file, it is used for a salvage process for reflecting the divided data that is recorded in the recording medium but not reflected in the file system to the file system. Generating means for generating at least a marker including arrangement information on the recording medium of the divided data recorded on the recording medium;
Recording means for recording the divided data and the marker on the recording medium so that the divided data and the marker are arranged in a predetermined order on the recording medium;
Look including a holding means for holding the placement information of the marker on the recording medium,
The generation means accumulates arrangement information on the recording medium of the divided data recorded on the recording medium, generates the marker, and uses a marker whose data size has reached a predetermined upper limit as a key marker A recording device characterized by specifying . The recording apparatus according to claim 1, wherein the holding unit is a nonvolatile memory. It said retaining means, a recording apparatus according to claim 1, characterized in that holding arrangement information of the Kimaka generated by the generating means. The holding means also holds arrangement information on the recording medium of the divided data recorded on the recording medium that is not recorded on the recording medium in a state of being included in the marker. The recording apparatus according to 1. Based on the marker arrangement information held by the holding means, reading means for reading the marker from the recording medium;
The recording apparatus according to claim 1, further comprising: a salvage unit that executes the salvage process based on the marker read by the reading unit. In a recording method for recording data on a recording medium as a file, and also recording on the recording medium a file system indicating a correspondence relationship between identification information for identifying the file and a recording position of the file on the recording medium.
For each of a plurality of divided data constituting one file, it is used for a salvage process for reflecting the divided data that is recorded in the recording medium but not reflected in the file system to the file system. A generation step of generating a marker including at least arrangement information of the divided data recorded on the recording medium on the recording medium;
A recording step of recording the divided data and the marker on the recording medium so that the divided data and the marker are arranged in a predetermined order on the recording medium;
Look including a holding step of holding arrangement information of the marker on the recording medium,
The generation step accumulates the arrangement information on the recording medium of the divided data recorded on the recording medium, generates the marker, and uses the data whose marker data size reaches a predetermined upper limit as a key marker A recording method characterized by specifying . A file system that records data on a recording medium as a file and also shows a correspondence relationship between identification information for identifying the file and a recording position of the file on the recording medium is a program for recording on the recording medium. There,
For each of a plurality of divided data constituting one file, it is used for a salvage process for reflecting the divided data that is recorded in the recording medium but not reflected in the file system to the file system. Generating a marker including at least arrangement information on the recording medium of the divided data recorded on the recording medium;
A recording step of recording the divided data and the marker on the recording medium so that the divided data and the marker are arranged in a predetermined order on the recording medium;
Look including a holding step for holding the arrangement information of the marker on the recording medium,
The generation step accumulates the arrangement information on the recording medium of the divided data recorded on the recording medium, generates the marker, and uses the data whose marker data size reaches a predetermined upper limit as a key marker A program that causes a computer to execute a specified process.

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