JP2005259342A - Digital recording device, digital recording method and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance operability especially in reproducing/editing processing. <P>SOLUTION: In a recording device which is made capable of recording data, such as a plurality of pieces of image and audio data using a disc shape recording medium, such as an optical disc 20, a file generation device 5 is also configured to be equipped. From a plurality of pieces of the data recorded by the optical disc 20, extracted information, such as a part of the image data, is, for example, extracted. A file generation device 5 generates an index file composed by storing the extracted information. The generated index file is recorded on a designated position, such as the innermost circumference, for example, of the optical disc 20. In the reproducing/editing, and the like, the extracted information is read from the index file and is outputted via a designated display part, and the like, arranged at the device. Retrieval for specifying a requested one among the plurality of pieces of data recorded on the optical disc 20 can be easily performed based on the outputted extracted information. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a digital recording apparatus, a digital recording method, and a recording medium for recording video data and / or audio data.

  For example, in a recording device that records video data and / or audio data, such as a device in which a video camera and a recording device are integrated, data obtained by imaging and / or recording several scenes is stored for each file. To be recorded. Also, a recording / reproducing apparatus having a function of reproducing / editing recorded data by adding a display unit such as a liquid crystal display panel and a sound generating unit such as a speaker to the recording apparatus is known. . In such a recording / reproducing apparatus, particularly when a randomly accessible recording medium such as a magneto-optical disk is used, a user or the like can select desired data as an object for reproduction / editing by designating a file. Is possible.

  In this case, the file is generally designated by inputting a file name, for example. However, when a large number of files are recorded, there is a risk that the operability in reproduction / editing and the like may be impaired due to factors such as failure to store the file names and the like of files desired by the user.

  Accordingly, an object of the present invention is to provide a digital recording apparatus, a digital recording method, and a recording medium capable of improving operability.

In order to solve the above-described problem, a first aspect of the present invention is a digital recording apparatus using a recording medium.
Means for extracting information of a plurality of files recorded on a recording medium;
Means for associating the extracted information with each of a plurality of files;
Means for recording the extracted information on a recording medium,
The extracted information includes at least two pieces of information of property information, thumbnail information, and title information,
The property information indicates a plurality of attributes of a plurality of files, the thumbnail information includes a plurality of representative images representing the plurality of files, and the property information is a digital recording apparatus that associates the file with thumbnail information or title information.

According to a second aspect of the present invention, in a digital recording method using a recording medium,
Extracting information of a plurality of files recorded on the recording medium;
Associating the extracted information with each of a plurality of files;
Recording the extracted information on a recording medium,
The extracted information includes at least two pieces of information of property information, thumbnail information, and title information,
This is a digital recording method in which property information indicates a plurality of attributes of a plurality of files, thumbnail information includes a plurality of representative images representing the plurality of files, and the property information associates the file with thumbnail information or title information.

According to a third aspect of the present invention, in a recording medium for recording a plurality of files and extraction information of each of the plurality of files,
Multiple files and extraction information are associated,
Extraction information can be recorded on a recording medium,
The extraction information includes at least two pieces of information among property information, thumbnail information, and title information,
Property information indicates a plurality of attributes of a plurality of files, thumbnail information includes a plurality of representative images representing a plurality of files, and property information is a recording medium that associates the file with thumbnail information or title information.

  According to the present invention, the extraction information relating to each of the plurality of files recorded on the disk-shaped recording medium can be output, and desired data can be easily retrieved in relation to the extraction information.

  FIG. 1 shows an example of the configuration of a digital recording / reproducing apparatus according to an embodiment of the present invention. In FIG. 1, 1 indicates a video encoder. A video signal generated by supplying imaging light to an imaging device such as a CCD (Charge Coupled Device) by an optical system (not shown) is supplied to the video encoder 1, and the video signal is compressed and encoded in the video encoder 1. Is done. Reference numeral 2 denotes an audio encoder. An audio signal generated by an audio signal generation unit such as a microphone is supplied to the audio encoder 2, and the audio signal is compressed and encoded in the audio encoder 2. For example, MPEG is used as compression encoding for video signals and audio signals. The outputs of the video encoder 1 and the audio encoder 2 are called elementary streams.

  In the case of MPEG, the video encoder 1 includes a motion prediction unit that detects a motion vector, a picture order rearrangement unit, a subtraction unit that forms a prediction error between an input video signal and a local decoded video signal, and a DCT that performs DCT conversion on the subtraction output. , A quantization unit that quantizes the output of the DCT unit, a variable length coding unit that performs variable length coding on the quantized output, and a buffer memory that outputs encoded data at a constant rate. The picture order rearranging unit rearranges the picture order to one suitable for encoding processing. That is, the I and P pictures are encoded first, and then the pictures are rearranged in an order suitable for encoding the B picture. The local decoding unit includes an inverse quantization unit, an inverse DCT unit, an addition unit, a frame memory, and a motion compensation unit. In the motion compensation unit, forward prediction, backward prediction, and bidirectional prediction are possible. In the case of intra coding, the subtraction unit does not perform the subtraction process and simply passes the data. The audio encoder 2 includes a subband encoding unit, an adaptive quantization bit allocation unit, and the like.

  As an example, in the case of a portable camera-integrated disk recording / playback apparatus, an image captured by a video camera is used as a video input, and sound collected by a microphone is used as an audio input. In the video encoder 1 and the audio encoder 2, the analog signal is converted into a digital signal and processed. In this embodiment, a rewritable optical disc is used as a recording medium. As this type of optical disk, a magneto-optical disk, a phase change disk or the like can be used. In one embodiment, a relatively small-diameter magneto-optical disk is used.

The outputs of the video encoder 1 and the audio encoder 2 are supplied to the file generator 5. The file generator 5 has a data structure of a video elementary stream and an audio elementary stream so as to have a file structure that can be handled by computer software for synchronously playing back moving images and the like without using special hardware. Convert. In this embodiment, for example, QuickTime is used as software. QuickTime includes video, still images, text, audio, MIDI (Musical Instrument
It is software that can handle various data such as (Digital Interface) and can control these data along the time axis. Data obtained by storing various data using QuickTime is called a QuickTime movie file.

  In the file generator 5, the encoded video data and the encoded audio data are multiplexed. The file generator 5 is controlled by the system control microcomputer 9 in order to create the structure of the QuickTime movie file. The index file according to the present invention is also generated by the file generator 5.

  QuickTime movie files from the file generator 5 are sequentially written into the memory 7 via the memory controller 8. When a data write request to the disk is input from the system control microcomputer (microcomputer) 9 to the memory controller 8, a QuickTime movie file is read from the memory 7 by the memory controller 8. Here, the transfer rate of QuickTime movie encoding is lower than the transfer rate of write data to the disc, for example, about 1/2. Therefore, while QuickTime movie files are continuously written in the memory 7, reading from the memory 7 is performed intermittently while the system control microcomputer 9 monitors that the memory 7 does not overflow or underflow.

  The QuickTime movie file read from the memory 7 via the memory controller 8 is supplied to the error correction code / decoder 11. The error correction code / decoder 11 once writes the QuickTime movie file in the memory 10, performs processing for generating interleaved and error correction code redundant data, and reads the data with the redundant data added thereto.

  The output of the error correction code / decoder 11 is supplied to the data modulator / demodulator 13. The data modulator / demodulator 13 modulates data so as to facilitate clock extraction during reproduction and prevent problems such as intersymbol interference when recording digital data on a disc. For example, RLL (1, 7) can be used.

  The output of the data modulator / demodulator 13 is supplied to the magnetic field modulation driver 14 and outputs a signal for driving the optical pickup 23. The magnetic field modulation driver 14 drives the magnetic field head 22 in accordance with the input signal and applies a magnetic field to the optical disc 20. The optical pickup 23 irradiates the optical disk 20 with a recording laser beam. In this way, data is recorded on the optical disc 20. The optical disk 20 is rotated by a motor 21 at CLV (constant linear velocity), CAV (constant velocity), or ZCAV (zone CLV).

  Since intermittent data read from the memory controller 8 is recorded on the optical disc 20, normally, a continuous recording operation is not performed. When a certain amount of data is recorded, the recording operation is interrupted and waits until the next recording request. As described above, the recording operation is performed intermittently.

  In response to a request from the system control microcomputer 9, the drive control microcomputer 12 issues a request to the servo circuit 15, and the entire disk drive is controlled. Thereby, a recording operation is performed. The servo circuit 15 performs servo movement of the optical pickup 23 in the disk radial direction, tracking servo, focus servo, and spindle servo of the motor 21. Although not shown, a user operation input unit is provided in association with the system control microcomputer 9.

  Next, the configuration and operation for reproduction will be described. During reproduction, the optical disc 20 is irradiated with a reproduction laser beam, and the reflected light from the optical disc 20 is converted into a reproduction signal by a detector in the optical pickup 23. In this case, a tracking error and a focus error are detected from the output signal of the detector of the optical pickup 23, and the read laser beam is positioned on the track and controlled by the servo circuit 15 so as to be focused on the track. Further, the movement of the optical pickup 23 in the radial direction is controlled to reproduce data at a desired position on the optical disc 20.

  At the time of reproduction, similarly to the case of recording, data is reproduced from the optical disk 20 at a rate higher than, for example, twice the transfer laser of the QuickTime movie file. In this case, normally, continuous reproduction is not performed, and when a certain amount of data is reproduced, the reproduction operation is interrupted and an intermittent reproduction operation is performed to wait for the next reproduction request. In the reproduction operation, as in the recording operation, the drive control microcomputer 12 issues a request to the servo circuit 15 in response to a request from the system control microcomputer 9, and the entire disk drive is controlled.

  A reproduction signal from the optical pickup 23 is input to the data modulator / demodulator 13 and demodulated. The demodulated data is supplied to the error correction code / decoder 11. In the error correction code / decoder 11, the reproduction data is once written in the memory 10, and deinterleave processing and error correction processing are performed. The QuickTime movie file after error correction is written into the memory 7 via the memory controller 8.

  The QuickTime movie file written in the memory 7 is output to the file decoder 6 in accordance with the request of the system control microcomputer 9 in accordance with the synchronization timing for demultiplexing. The system control microcomputer 9 monitors the amount of data reproduced from the optical disc 20 and written to the memory 7 and the amount of data read from the memory 7 and output to the file decoder 6 in order to continuously reproduce the video signal and the audio signal. The memory controller 8 and the drive control microcomputer 12 are controlled so that the memory 7 does not overflow or underflow, and data is read from the optical disk 20.

  The file decoder 6 decomposes the QuickTime movie file into a video elementary stream and an audio elementary stream under the control of the system control microcomputer 9. The video elementary stream is supplied to the video decoder 3 and the audio elementary stream is supplied to the audio decoder 4. The video elementary stream and the audio elementary stream from the file decoder 6 are output so that both are synchronized.

  The video decoder 3 and the audio decoder 4 perform compression encoding decoding, respectively, and generate a video output and an audio output. For example, MPEG is used as a compression encoding of video signals and audio signals. The video decoder 3 includes a buffer memory, a variable-length code decoding unit, an inverse DCT unit, an inverse quantization unit, an addition unit that adds the output of the inverse quantization unit and the local decoding output, a picture order rearrangement unit, a frame memory, and a motion The local decoding unit is composed of a compensation unit.

  In the case of intra coding, the adding process is not performed in the adding unit, and the data passes through the adding unit. The decoded data from the adding unit is made the original image order by the picture order rearranging unit. The output of the video decoder 3 is supplied to a display unit (not shown) such as an LCD (Liquid Crystal Display). Further, it may be supplied to an external image display device via an external output terminal. The output of the audio decoder 4 is supplied to a sound generator (not shown) such as a speaker. Moreover, you may supply to an external audio | voice generator via an external output terminal.

  Since the optical disk 20 on which data is recorded as described above is detachable, it can be reproduced by other devices. For example, a personal computer operating with QuickTime application software can read data recorded on the optical disc 20 and reproduce video and audio data recorded by the personal computer. Furthermore, the present invention can be applied to the case where only video data or only audio data is handled.

  An example of the external shape of one embodiment of the present invention is schematically shown in FIG. Reference numeral 210 is a photographing lens. In addition, a display corresponding to a reproduced image and operation content is performed via the display panel 220. The display panel 220 includes a piezoelectric element and the like together with a display element such as an LCD, and the user can input an operation such as reproduction by an operation such as pressing each display portion with the pointing device 230. It is said that.

  In a randomly accessible disc-shaped recording medium, for example, a desired reproduction target can be selected by inputting a file name or the like. However, when a large number of files are recorded, the file name or the like of the file desired by the user cannot be stored, and as a result, the convenience in operations such as reproduction and editing may be impaired. In order to improve such a situation, in one embodiment of the present invention, as shown in FIG. 3, representative images P1 to P9 (thumbnail images: Thumbnail Picture) of nine files in the display panel 220 are called. And the user can refer to select a desired file. Then, for example, a file can be selected by an operation such as pressing a display portion of any screen with the pointing device 230.

  In addition, by operating the display units 223, 224, 225, 226, 227, 228 and the like with the pointing device 230, it is possible to input desired operation contents such as reproduction and editing for the selected file. Here, it is possible to generate a sound corresponding to the screen selected by the pointing device 230 for a predetermined time such as several seconds.

  The display 221 is a display indicating an operation mode such as reproduction / editing or recording. The display 222 is a display showing the remaining recordable time. In addition, the display 229 is a scroll bar, and a screen that cannot be displayed at one time can be displayed at any time in response to moving the position of the display 229a up and down by operating the pointing device 230. Thereby, even when more screens than the number of screens that can be displayed at a time, such as nine, are recorded, these screens can be displayed at any time.

  As a method for enabling file search as described above, in one embodiment of the present invention, a part of image data and / or audio data in a plurality of files recorded on a disk-shaped recording medium is collected. An index file to be held is created, and the created index file is recorded at a predetermined position on the disc-shaped recording medium. The index file can be created, for example, in the form of a QuickTime movie file.

  The QuickTime movie file is first described below. An example of a QuickTime movie file that handles audio data and image data is shown in FIG. The largest components of a QuickTime movie file are a movie resource portion and a movie data portion. The movie resource portion stores time necessary for reproducing the file and data for referring to actual data. The movie data portion stores actual data such as video and audio.

  The movie resource part will be described in detail. The movie resource portion includes a movie header 41 that describes information relating to the entire file and a track for each data type. FIG. 4 shows an example of the internal structure of the video track 50 in detail. The video data track includes a track header 42 that describes information related to the entire track and a media part. The media part includes a media header 43 describing information related to the entire medium and a media handler 44 describing information related to the handling of media data.

  The media information section includes a sample table along with a video media handler 45 that describes information related to image media, a data handler 46 that describes information related to handling image data, and a data information 47 that describes information about data. It is recorded. In the sample table, a sample description that describes each sample, a time-to-sample that describes the relationship between the sample and the time axis, a sample size 48 that describes the sample size, and a relationship between the sample and the chunk Stored are a time-to-chunk, a chunk offset 49 describing the start bit position of the chunk in the movie data, a sync sample for describing the synchronization, and the like. Here, in Quick Time, a minimum unit of data (for example, a picture in MPEG encoded data) is handled as a sample, and a chunk is defined as an aggregate of samples. In order to improve accessibility during recording and reproduction, consecutive samples are stored in the chunk. The audio track 51 also has an internal structure similar to the internal structure of the video track, although not shown.

  On the other hand, in the movie data portion, for example, audio data encoded by a compression encoding method based on, for example, MPEG Audio Layer 2, and image data encoded by a compression encoding method in accordance with, for example, the MPEG (Moving Picture Expert Group) standard, respectively. Stored in units of chunks consisting of a predetermined number of samples. However, the encoding method is not limited to these, and it is also possible to store linear data that has not been subjected to compression encoding.

  Each track in the movie resource portion is associated with the data stored in the movie data portion. That is, since the example shown in FIG. 3 handles audio data and image data, the movie resource portion includes a video track and an audio track, and the movie data portion includes actual audio data and image data. Data and are included. When other types of data are handled, the content of the track in the movie resource part and the actual data in the movie data part may be matched with the data to be handled. For example, when dealing with text, MIDI, etc., the movie resource portion may include a track for text, MIDI, etc., and the movie data portion may include actual data such as text, MIDI, etc.

  In one embodiment of the present invention, an index file is created using a QuickTime movie file. In the index file, data depending on the type of data handled in the file to be searched is handled. Here, the description will be made on the assumption that the file to be searched is a file that handles image data and audio data (hereinafter referred to as an AV file). In this case, the index file handles four types of data: property, title, thumbnail picture, and intro music. The property is data indicating the attribute of each AV file. The title is data indicating the title of each AV file. A thumbnail picture is representative image data of one image such as the first image in each AV file. Intro music is a representative few seconds of audio data such as the first few seconds in each AV file.

  An example of an index file created using a QuickTime movie file is shown in FIG. In this example, the movie resource part includes a movie header 61 and tracks corresponding to four types of data: a property track 62, a title track 63, a thumbnail picture track 64, and an intro music track 65. However, only the property track 62 is an indispensable track, and other tracks may be used according to the type of data handled in the index file. In this example, the movie data portion includes four types of actual data, ie, properties, titles, thumbnail pictures, and intro music. However, only property data is an essential track, and other data may be used according to the type of data handled in the index file.

An example of the property track 62 is shown in FIG. AV File Property # 1, AV File defined as chunks related to property data corresponding to each AV data
For each of Property # 2,..., AV File Property # n, the data length (for example, variable length displayed in bytes) L_AP1, L_AP2,..., L_APn, and start byte position 0, L_AP1, The table format indicates L_AP1 + L_AP2,.

  An example of property data (actual data) for each AV data is shown in FIG. One byte with the 0th byte as the start byte position indicates version information. Two bytes with the first byte as the start byte position are used as a flag area described later. One byte with the third byte as the start byte position indicates a data type such as a moving image, a still image, or audio. Four bytes with the fourth byte as the start byte position indicate the creation date and time of the AV file. The 4th byte with the 8th byte as the start byte position indicates the date and time when the AV file was modified.

  Four bytes starting from the 12th byte indicate the length of time required for the AV file to be played. The variable length byte L_FI with the 16th byte as the start byte position indicates the file name of the AV file. Therefore, the total data length of the property data corresponding to each AV file is variable length L_AP1, L_AP2,..., L_APn as described above.

  An example of the flag area is shown in FIG. The 0th bit is 0 when the entered data is a file, and is 1 when the entered data is a grouped file group or directory. The first bit is set to 0 when there is no file to be referenced in the AV file, and is set to 1 when there is a file to be referenced in the AV file. The second bit is 0 when no title is registered, and 1 when a title is registered. The third bit is 0 when the title data is in the index file, and is 1 when the title data is in the AV file indicated by the property data. The fourth bit is set to 0 when a thumbnail image is not registered in the AV file, and is set to 1 when a thumbnail image is registered in the AV file.

  The fifth bit is 0 when the thumbnail image data is in the index file, and is 1 when the thumbnail image data is in the AV file indicated by the property data. The sixth bit is set to 0 when intro music data is not registered in the AV file, and is set to 1 when intro music data is registered in the AV file. The seventh bit is set to 0 when the intro music data is in the AV file, and is set to 1 when the intro music data is in the AV file indicated by the property data. The 8th to 15th bits are reserved.

  An example of the title track 63 is shown in FIG. In one embodiment of the present invention, a title can be registered for each AV file to be searched. The registered title is stored as actual data in the movie data portion, and the title data length and start position for each AV file are indicated by the title track. As shown in FIG. 9, the title track is defined for each of AV File Title # 1, AV File Title # 2,..., AV File Title #n defined as chunks related to title data corresponding to each AV data. , L_AT1, L_AT2,..., L_ATn, and start byte positions 0, L_AT1, L_AT1 + L_AT2,... Yes.

  Next, an example of the thumbnail track 64 is shown in FIG. In one embodiment of the present invention, one thumbnail image can be registered for each AV file to be searched. The thumbnail image to be registered is stored as actual data in the movie data portion, and the thumbnail image data length and start position for each AV file are indicated by a thumbnail track. The thumbnail track has a data length (for example, byte unit) for each of AV File Thumbnail # 1, AV File Thumbnail # 2,..., AV File Thumbnail #n defined as chunks related to thumbnail data corresponding to each AV data L_TH1, L_TH2,..., L_THn, start byte position 0, L_TH1, L_TH1 + L_TH2,.

  An example of the intro music track 65 is shown in FIG. In one embodiment of the present invention, one intro part (for example, 5 seconds from the beginning) of audio data can be registered for each AV file to be searched. The intro music to be registered is stored as actual data in the movie data portion, and the data length and start position of the intro music for each AV file are indicated by the intro music track. The intro music track has a data length for each of AV File Intro Music # 1, AV File Intro Music # 2,..., AV File Intro Music #n defined as chunks related to intro music corresponding to each AV data. (For example, variable length displayed in byte units) L_IS1, L_IS2,..., L_ISn, and start byte positions 0, L_IS1, L_IS1 + L_IS2,.

  The contents of the property track 62, the title track 63, the thumbnail track 64, the introscopic track 65, and the like described above are displayed as shown in FIG. 12 under the QuickTime movie file format. As described above, the sample size table and the chunk offset table are described in the media information part in each track in the movie resource portion corresponding to the AV file (see FIG. 4). In the property track 62, title track 63, thumbnail track 64, and intro music track 64, the sample size table includes property data, title data, thumbnail image data, and intro music data data corresponding to each AV file. Describe the size.

That is, S11, S12,..., S1n indicate the size of property data corresponding to AV File # 1, AV File # 2,. Further, S21, S22,..., S2n indicate the sizes of title data corresponding to AV File # 1, AV File # 2,. S31, S32,..., S3n are AV File # 1, AV File # 2,.
The size of the thumbnail image data corresponding to #n is shown. In addition, S41, S42,..., S4n indicate the sizes of intro music data corresponding to AV File # 1, AV File # 2,.

Similarly, the chunk offset table describes the recording start byte position of the property, title, thumbnail image data, intro music data, etc. corresponding to each AV file. That is, O11, O12,..., O1n indicate the start byte positions of property data corresponding to AV File # 1, AV File # 2,. In addition, O21, O22,..., O2n indicate start byte positions corresponding to AV File # 1, AV File # 2,. In addition, O31, O32,..., O3n are respectively AV File.
# 1, AV File # 2,..., AV File #n indicates the start byte position of the thumbnail image data. In addition, O41, O42,..., O4n indicate the start byte positions of intro music data corresponding to AV File # 1, AV File # 2,.

  With the above description, property data, title data, thumbnail image data, intro music data, and the like corresponding to each AV file can be accurately accessed in the movie data portion.

  In the above description, data for search is output based on an AV index file having a movie resource portion and a movie data portion. On the other hand, it is also possible to output an image, sound, etc. for search by designating data stored in the movie data part in another index file by a file consisting only of the movie resource part. . Such a case will be described below. As shown in FIG. 13, an AV Index File # 1 including only a movie resource portion is recorded together with an AV Index File # 0 having a movie resource portion and a movie data portion. When the 0th bit is set to “1” in the flag area of the property data in AV Index File # 0, the entry data is a group of files or directories (see FIG. 8). Here, AV Index File # 1 is designated as a source part corresponding to each grouped file group or actual data in the directory.

  AV Index File # 1 is data for each AV file with respect to part of the data stored in the movie data portion in AV Index File # 0, such as property data, title data, and thumbnail image data as shown in FIG. Describe size, starting byte position, etc. AV Index File # 1 can also indicate only data corresponding to some AV files among the data stored in the movie data portion in AV Index File # 0. In this way, only a part of the stored data such as title data, thumbnail image data, intro music data, etc. is output for search, or it is output to a part of the AV file on the recording medium. Processing such as outputting only the corresponding one is possible. Thereby, it is possible for the user or the like to perform an operation such as performing a search after narrowing down the search range in advance.

  In addition, the description of the movie resource part in the index file having the movie resource part and the movie data part can be made to correspond to the data stored in the movie data part in another index file. For example, if the fifth bit is “1” in the flag area of the property data in AV Index File # 0, it is assumed that the thumbnail image data exists in the file designated in the property track. This is the case (see FIG. 8). The file indicated here is QT Movie File # 1. This QTMMovie File # 1 has a movie resource portion and a movie data portion, and thumbnail image data and normal image data are stored in the movie data portion.

  As a result, it is possible to handle data at the time of search even under file formats other than the above-described index file format, and the file format related to the search can be made more flexible. QT Movie File # 1 is such that thumbnail image data is stored in the movie data portion, but title data and intro music data may be stored in the movie data portion. In this case, for example, the seventh bit in the flag area in the property data in AV Index File # 0 is set to “1”.

  As described above, when the 0th bit is set to “1” in the flag area in the property data and the entered data is a grouped file group or directory, the data is hierarchically arranged. It can be handled. That is, as shown in FIG. 14, an index file AVIF0000. Having a movie resource portion and a movie data portion. Treat MOV as root directory. Here, AVIF0000. In the movie resource portion of the MOV, the sample size and the chunk offset are described, whereby AVIF0000. Property data, title data, thumbnail image data, intro music data, etc. stored in the movie data portion of the MOV are designated.

  At this time, the file name is described in the title data, so that AVIF0001. MOV is indicated. AVIF0001. Since the MOV also has the format of the QuickTime movie file, AV000001 as another (lower level) directory is described by the description in the property data. MOV, AV000002. MOV is instructed. With such a hierarchical file structure, data can be handled hierarchically.

  Further, the index file is recorded at a predetermined position such as the innermost peripheral position 21 of the disc-shaped recording medium 20 as shown in FIG. Then, it is first played back at the start of the playback / editing mode. Thereby, a search screen as shown in FIG. 2 is displayed at the start of the reproduction / editing mode or the like. A general AV file or the like is recorded in another storage area.

  In the above-described embodiment of the present invention, data for search related to an index file is output using a display panel, a speaker, and the like provided in the recording apparatus. On the other hand, the present invention can also be applied to a case where an operation such as reproduction / editing is performed using an external device that outputs image data, audio data, and the like.

  The present invention does not depend on the compression encoding method used when recording image data, audio data, etc., and can be generally applied to data that can be handled, for example, in the format of a QuickTime movie file. it can.

  The present invention is not limited to the above-described embodiment of the present invention, and various modifications and applications can be made without departing from the gist of the present invention.

It is a block diagram which shows an example of a structure of the digital recording / reproducing apparatus in one Embodiment of this invention. It is a basic diagram which shows an example of the external shape of one Embodiment of this invention. It is a basic diagram which shows an example of the display by a display panel. It is a basic diagram shown in an example of a QuickTime movie file. It is a basic diagram shown in an example of the index file in this invention. It is an approximate line figure for explaining a property track in detail. It is an approximate line figure for explaining property data in detail. It is an approximate line figure for explaining a part of property data in detail. It is an approximate line figure for explaining a title track in detail. It is a basic diagram for demonstrating in detail about a thumbnail track. It is an approximate line figure for explaining an intro music track in detail. It is a basic diagram for demonstrating in detail the instruction | indication regarding real data by a property track | truck etc. FIG. It is a basic diagram for demonstrating the case where the part of the data stored in the movie data part is instructed from another file. It is a basic diagram for demonstrating the hierarchical structure of a directory. It is a basic diagram for demonstrating the recording position of an index file.

Explanation of symbols

9 System control microcomputer 20 Optical disk

Claims (30)

In a digital recording apparatus using a recording medium,
Means for extracting information of a plurality of files recorded on a recording medium;
Means for associating the extracted information with each of the plurality of files;
Means for recording the extracted information on a recording medium,
The extracted information includes at least two pieces of information of property information, thumbnail information, and title information,
The property information indicates a plurality of attributes of the plurality of files, the thumbnail information includes a plurality of representative images representing the plurality of files, and the property information associates the file with the thumbnail information or the title information. Digital recording device. In claim 1,
The means for associating the extracted information is a digital recording device that generates an index file. In claim 2,
A digital recording apparatus in which the index file includes at least the property information. In claim 3,
A digital recording apparatus, wherein the property information includes data indicating whether thumbnail information is included in the index file. In claim 3,
A digital recording apparatus, wherein the property information includes data indicating whether title information is included in the index file. In claim 4,
A digital recording apparatus in which data indicating that thumbnail information is included in a file specified by the index file is included in property information. In claim 5,
A digital recording apparatus in which data indicating that title information is included in a file specified by the index file is included in property information. In claim 1,
A digital recording apparatus in which the extracted information is recorded at a predetermined position of a recording medium. In claim 8,
A digital recording apparatus in which the extracted information is recorded in a recording area near the innermost periphery of the recording medium. In claim 1,
A digital recording apparatus in which the extracted information is reproduced at the start of a predetermined operation mode, and the reproduced extracted information is output in association with each of the plurality of files. In claim 10,
A digital recording apparatus wherein the predetermined operation mode is a reproduction and / or editing mode. In claim 1,
A digital recording apparatus in which the extracted information includes attribute data of each of the plurality of files. In claim 12,
A digital recording apparatus in which the attribute data includes a date and time when each of the plurality of files is recorded. In claim 12,
A digital recording apparatus, wherein the attribute data includes a date and time when each of the plurality of files is modified. In claim 12,
A digital recording apparatus in which the attribute data includes the length of each of the plurality of files. In claim 12,
A digital recording apparatus in which the attribute data includes a data type representing the types of the plurality of files. In claim 1,
A digital recording apparatus in which the extracted information includes titles of the plurality of files. In claim 1,
A digital recording apparatus in which the extracted information includes a part of image data included in each of the plurality of files. In claim 1,
A digital recording apparatus in which the extracted information includes a part of audio data included in each of the plurality of files. In claim 2,
The above index file is
A first region comprising a collection of the extracted information;
A second area including association information for associating the extracted information with the file from which the extracted information is extracted, and position information indicating a position where each of the extracted information is recorded in the first area; A digital recording device comprising: In claim 20,
The digital recording apparatus, wherein the second area includes association information that associates the extracted information with a data group selected from the plurality of files. In claim 20,
A resource file including data in the same format as the second area is further recorded,
The resource file has position information indicating the position of the extracted information in the first area,
A digital recording apparatus in which the plurality of files recorded on the recording medium are easily searched when an operation mode including a reproduction operation is performed. In claim 22,
A digital recording apparatus, wherein the resource file includes information associating the extracted information with a data group selected from a plurality of files recorded on the recording medium. In claim 20,
A digital recording apparatus wherein the second area indicates data of the first area of another index file. In claim 20,
A digital recording apparatus in which the second area indicates data of another file. In claim 25,
A digital recording apparatus in which the other file includes the extracted information. In a digital recording method using a recording medium,
Extracting information of a plurality of files recorded on the recording medium;
Associating extracted information with each of the plurality of files;
Recording the extracted information on a recording medium,
The extracted information includes at least two pieces of information of property information, thumbnail information, and title information,
The property information indicates a plurality of attributes of the plurality of files, the thumbnail information includes a plurality of representative images representing the plurality of files, and the property information associates the file with the thumbnail information or the title information. Digital recording method. In a recording medium that records a plurality of files and extraction information of each of the plurality of files,
Multiple files and extraction information are associated,
The extracted information can be recorded on a recording medium,
The extracted information includes at least two pieces of information among property information, thumbnail information, and title information,
The property information indicates a plurality of attributes of the plurality of files, the thumbnail information includes a plurality of representative images representing the plurality of files, and the property information associates the file with the thumbnail information or the title information. recoding media. In a digital recording apparatus using a recording medium,
Means for generating image data;
Means for recording the image data as an image file on a recording medium;
Means for extracting information of each of the plurality of image files recorded on the recording medium;
Means for associating the extracted information with the plurality of image files;
Means for recording the extracted information on the recording medium,
The extracted information includes at least two pieces of information of property information, thumbnail information, and title information,
The property information indicates a plurality of attributes of the plurality of files, the thumbnail information includes a plurality of representative images representing the plurality of files, and the property information includes the image file and the thumbnail information or the title information. Associated digital recording device. In claim 29,
Means for displaying the representative image on the display surface;
Means for indicating the representative image on the display surface;
A digital recording apparatus in which image data is reproduced on the display surface based on the extracted information when the representative image is designated.

Images