JP4085109B2 - Recording apparatus and recording method - Google Patents

Description

  The present invention relates to a recording apparatus and a recording method for recording video data and audio data on an information recording medium, and an information recording medium on which video data and audio data are recorded.

There is an apparatus for recording video data and audio data on an information recording medium such as an optical disk and editing the recorded video data and audio data (see, for example, Patent Document 1). In such an apparatus, it is desirable that video data and audio data be recorded on an information recording medium so that editing and reproduction operations can be performed at high speed.
JP 11-88827 A

  Although not mentioned in Patent Document 1, video data and audio data (auxiliary data, metadata, etc.) other than video data and audio data can also be edited and played back at high speed. It is desirable to record the information recording medium in association with the data.

  The present invention relates to a recording apparatus, a recording method, and a recording method for recording video data, audio data, and other data (auxiliary data, metadata, etc.) in association with each other so that editing and playback operations can be performed at high speed. It is another object of the present invention to provide an information recording medium in which data associated therewith is recorded.

The recording apparatus of the present invention receives video data including a plurality of video unit data indicating video and audio data related to the video data, and identifies the plurality of video unit data for each of the plurality of video unit data. Generating a video data file to which video-specific data for adding is generated, and generating an audio data file to which audio-specific data for identifying the audio data is added to the audio data; and the video data file And the audio data file, the video data file is divided into a plurality of video data elements, and the audio data file is divided into a plurality of audio data associated with each of the plurality of video data elements. The i-th video data element of the plurality of video data elements includes a predetermined number of video unit data of the plurality of video unit data. A division unit, an i-th audio data element related to the i-th video data element of the plurality of audio data elements, and the i-th video data element included in a predetermined recording unit. As described above, an arrangement unit for arranging the i-th video data element and the i-th audio data element, and the arranged i-th video data element and the i-th audio data element as an information recording medium. and a recording unit for recording the, the file generation unit, the bi And further generating a metadata file in which metadata specific data for identifying the metadata is added to the metadata, and the dividing unit generates the metadata file. A plurality of metadata elements associated with each of the plurality of video data elements, and the arrangement unit includes an i-th metadata element associated with the i-th video data element of the plurality of metadata elements; The i-th audio data element is arranged before the i-th video data element in the predetermined recording unit, thereby achieving the above object.

The file generation unit further receives auxiliary data including compressed video data compressed at a compression rate higher than the compression rate of the video data, and gives auxiliary data specific data for identifying the auxiliary data to the auxiliary data An auxiliary data file is further generated, and the dividing unit divides the auxiliary data file into a plurality of auxiliary data elements associated with each of the plurality of video data elements, and the arrangement unit includes the plurality of auxiliary data elements. The i-th auxiliary data element related to the i-th video data element and the i-th metadata element may be arranged adjacent to each other in the predetermined recording unit.

The i-th auxiliary data element may further include compressed audio data compressed at a compression rate higher than that of the video unit data.

The arrangement unit may arrange the i-th auxiliary data element before the i-th video data element.

The arrangement unit may arrange the auxiliary data element before the metadata element, the audio data element, and the video data element.

The recording apparatus of the present invention receives video data including a plurality of video unit data indicating video and audio data related to the video data, and identifies the plurality of video unit data for each of the plurality of video unit data. Generating a video data file to which video-specific data for adding is generated, and generating an audio data file to which audio-specific data for identifying the audio data is added to the audio data; and the video data file And the audio data file, the video data file is divided into a plurality of video data elements, and the audio data file is divided into a plurality of audio data associated with each of the plurality of video data elements. The i-th video data element of the plurality of video data elements includes a predetermined number of video unit data of the plurality of video unit data. A division unit, an i-th audio data element related to the i-th video data element of the plurality of audio data elements, and the i-th video data element included in a predetermined recording unit. As described above, an arrangement unit for arranging the i-th video data element and the i-th audio data element, and the arranged i-th video data element and the i-th audio data element as an information recording medium. A recording unit for recording the file, and the file generation unit Further receiving auxiliary data including compressed video data compressed at a compression rate higher than the compression rate of the data, and further generating an auxiliary data file in which auxiliary data specific data for identifying the auxiliary data is added to the auxiliary data; The dividing unit divides the auxiliary data file into a plurality of auxiliary data elements associated with the plurality of video data elements, and an i-th auxiliary data element of the plurality of auxiliary data elements is the i-th video data. Associated with a data element, wherein the dividing unit specifies a position corresponding to a head of the i-th auxiliary data element of the video data file, and the dividing unit is located before the specified position. A position of an ECC block unit of the information recording medium from the specified position. The video data file is divided so that a position separated by an integer multiple of the data size is at the head of the i-th video data element, thereby achieving the above object .

The recording apparatus of the present invention receives video data including a plurality of video unit data indicating video and audio data related to the video data, and adds the plurality of video unit data to each of the plurality of video unit data. A file generation unit for generating a video data file with video unique data for identifying each other, and generating an audio data file with audio specific data for identifying the audio data added to the audio data; and the video Receiving a data file and the audio data file, dividing the video data file into a plurality of video data elements and a plurality of audio data files associated with each of the plurality of video data elements; A division unit that divides the audio data element, wherein an i-th video data element of the plurality of video data elements is a predetermined number of video unit data of the plurality of video unit data. A predetermined recording unit including a dividing unit, an i-th audio data element related to the i-th video data element of the plurality of audio data elements, and the i-th video data element. An i-th video data element and an i-th audio data element are arranged, and the i-th video data element and the i-th audio data element are recorded as information. A recording unit for recording on a medium, the file generation unit, Further receiving metadata related to the video data and audio data, and further generating a metadata file in which metadata specific data for identifying the metadata is added to the metadata, and the dividing unit includes the metadata Dividing the file into a plurality of metadata elements associated with each of the plurality of video data elements, wherein an i th metadata element of the plurality of metadata elements is associated with the i th video data element; The dividing unit specifies a position corresponding to a head of the i-th video data element in the metadata file, and the dividing unit is a position after the specified position and is specified. A data number that is an integral multiple of the ECC block unit of the information recording medium The metadata file is divided so that the position where the noise is separated becomes the head of the i-th metadata element, and the above object is achieved .

The recording apparatus of the present invention receives video data including a plurality of video unit data indicating video and audio data related to the video data, and adds the plurality of video unit data to each of the plurality of video unit data. A file generation unit for generating a video data file with video unique data for identifying each other, and generating an audio data file with audio specific data for identifying the audio data added to the audio data; and the video Receiving a data file and the audio data file, dividing the video data file into a plurality of video data elements and a plurality of audio data files associated with each of the plurality of video data elements; A division unit that divides the audio data element, wherein an i-th video data element of the plurality of video data elements is a predetermined number of video unit data of the plurality of video unit data. A predetermined recording unit including a dividing unit, an i-th audio data element related to the i-th video data element of the plurality of audio data elements, and the i-th video data element. An i-th video data element and an i-th audio data element are arranged, and the i-th video data element and the i-th audio data element are recorded as information. A recording unit for recording on a medium, and the dividing unit includes the audio unit. A position corresponding to the head of the i-th video data element of the i-data file is specified, and the dividing unit is a position after the specified position, and the information from the specified position. The audio data file is divided so that a position separated by an integer multiple of the ECC block unit of the recording medium is the head of the i-th audio data element. Achieved.

The I-th video unique data of the video unique data for identifying the I-th (I is an integer) video unit data of the plurality of video unit data is added to the I-th video unit data. The file generation unit adds filling data and filling data specific data for identifying the filling data to the I-th video unit data, and adds the I-th video unit data and the I-th video unit data. The data size of the video unique data, the filling data, and the filling data unique data may be equal to an integer multiple of the sector unit of the information recording medium.

The information recording medium may be provided with a header area, and the arrangement unit may output the audio specific data to the recording unit so that the audio specific data is recorded in the header area.

The arrangement unit, when a defective area exists in the information recording medium, provides rearrangement data for forming a rearrangement area used for rearranging predetermined data according to the defect area. The i-th video data element and the i-th audio data element may be arranged so as to be recorded in a recording unit.

The array unit uses, as the predetermined recording unit, shift data for forming a shift area used to shift predetermined data in accordance with the defective area when a defective area exists in the information recording medium. The i-th video data element and the i-th audio data element may be arranged so as to be included and recorded.

The recording method of the present invention receives video data including a plurality of video unit data indicating video and audio data related to the video data, and identifies the plurality of video unit data with each of the plurality of video unit data. Generating a video data file to which video-specific data for adding audio is added, and generating an audio data file to which audio-specific data for identifying the audio data is added to the audio data; the video data file; and Receiving an audio data file, dividing the video data file into a plurality of video data elements and a plurality of audio data associated with each of the plurality of video data elements. The i-th video data element of the plurality of video data elements includes a predetermined number of video unit data of the plurality of video unit data; The i-th audio data element related to the i-th video data element of the plurality of audio data elements and the i-th video data element are recorded in a predetermined recording unit. Arranging the i-th video data element and the i-th audio data element, and recording the arranged i-th video data element and the i-th audio data element on an information recording medium; And generating the file includes the video data. And metadata associated with the audio data, and further generating a metadata file in which metadata specific data for identifying the metadata is added to the metadata. Dividing the data file into a plurality of metadata elements associated with each of the plurality of video data elements, wherein the arranging step is associated with the i-th video data element of the plurality of metadata elements. and arranging the i-th metadata element and the i-th audio data element before the i-th video data element in the predetermined recording unit. Is achieved.

The step of generating the file further receives auxiliary data including compressed video data compressed at a compression rate higher than the compression rate of the video data, and adds auxiliary data specific data for identifying the auxiliary data to the auxiliary data. Generating the attached auxiliary data file, wherein the dividing step includes dividing the auxiliary data file into a plurality of auxiliary data elements associated with each of the plurality of video data elements, and the arranging step is And arranging the i-th auxiliary data element related to the i-th video data element of the plurality of auxiliary data elements and the i-th metadata element adjacent to each other in the predetermined recording unit. May be included.

The i-th auxiliary data element may further include compressed audio data compressed at a compression rate higher than that of the video unit data.

The arranging step may include a step of arranging the i-th auxiliary data element before the i-th video data element .

The arranging step may include a step of arranging the auxiliary data element before the metadata element, the audio data element, and the video data element.

The recording method of the present invention receives video data including a plurality of video unit data indicating video and audio data related to the video data, and identifies the plurality of video unit data with each of the plurality of video unit data. Generating a video data file to which video-specific data for adding audio is added, and generating an audio data file to which audio-specific data for identifying the audio data is added to the audio data; the video data file; and Receiving an audio data file, dividing the video data file into a plurality of video data elements and a plurality of audio data associated with each of the plurality of video data elements. The i-th video data element of the plurality of video data elements includes a predetermined number of video unit data of the plurality of video unit data; The i-th audio data element related to the i-th video data element of the plurality of audio data elements and the i-th video data element are recorded in a predetermined recording unit. Arranging the i-th video data element and the i-th audio data element, and recording the arranged i-th video data element and the i-th audio data element on an information recording medium; And generating the file includes the video data. A step of further receiving auxiliary data including compressed video data compressed at a compression rate higher than the compression rate, and further generating an auxiliary data file in which auxiliary data specific data for identifying the auxiliary data is added to the auxiliary data. And the step of dividing includes the step of dividing the auxiliary data file into a plurality of auxiliary data elements associated with each of the plurality of video data elements, the i-th auxiliary data element of the plurality of auxiliary data elements Is associated with the i-th video data element, and the dividing step includes the step of identifying a position corresponding to the beginning of the i-th auxiliary data element in the video data file, The process is a position before the specified position, and the specified position And a step of dividing the video data file so that a position separated from the position by an integer multiple of the ECC block unit of the information recording medium is a head of the i-th video data element. This achieves the above object.

The recording method of the present invention receives video data including a plurality of video unit data indicating video and audio data related to the video data, and identifies the plurality of video unit data with each of the plurality of video unit data. Generating a video data file to which video-specific data for adding audio is added, and generating an audio data file to which audio-specific data for identifying the audio data is added to the audio data; the video data file; and Receiving an audio data file, dividing the video data file into a plurality of video data elements and a plurality of audio data associated with each of the plurality of video data elements. The i-th video data element of the plurality of video data elements includes a predetermined number of video unit data of the plurality of video unit data; The i-th audio data element related to the i-th video data element of the plurality of audio data elements and the i-th video data element are recorded in a predetermined recording unit. Arranging the i-th video data element and the i-th audio data element, and recording the arranged i-th video data element and the i-th audio data element on an information recording medium; It encompasses, generating the file process, the video data And metadata associated with the audio data, and further generating a metadata file in which metadata specific data for identifying the metadata is added to the metadata. Dividing a data file into a plurality of metadata elements associated with each of the plurality of video data elements, wherein an i th metadata element of the plurality of metadata elements is associated with the i th video data element The dividing step includes a step of specifying a position corresponding to a head of the i-th video data element in the metadata file, and the dividing step is performed after the specified position. And the information recording medium from the specified position. Integral multiple of the data size away the ECC block unit of body, so that the head of the i-th metadata element, characterized in that it comprises a step of dividing the metadata file, the by its The objective is achieved.

The recording method of the present invention receives video data including a plurality of video unit data indicating video and audio data related to the video data, and identifies the plurality of video unit data with each of the plurality of video unit data. Generating a video data file to which video-specific data for adding audio is added, and generating an audio data file to which audio-specific data for identifying the audio data is added to the audio data; the video data file; and Receiving an audio data file, dividing the video data file into a plurality of video data elements and a plurality of audio data associated with each of the plurality of video data elements. The i-th video data element of the plurality of video data elements includes a predetermined number of video unit data of the plurality of video unit data; The i-th audio data element related to the i-th video data element of the plurality of audio data elements and the i-th video data element are recorded in a predetermined recording unit. Arranging the i-th video data element and the i-th audio data element, and recording the arranged i-th video data element and the i-th audio data element on an information recording medium; And dividing the audio data file. Identifying the position corresponding to the head of the i-th video data element in the file, wherein the dividing step is a position after the identified position and from the identified position Including a step of dividing the audio data file so that a position separated by an integral multiple of an ECC block unit of the information recording medium is a head of the i-th audio data element. This achieves the above object.

The I-th video unique data of the video unique data for identifying the I-th (I is an integer) video unit data of the plurality of video unit data is added to the I-th video unit data. And the step of generating the file includes the step of adding filling data and filling data specific data for identifying the filling data to the I-th video unit data, And the I-th video unique data, the filling data, and the filling data unique data may be equal to an integral multiple of the sector unit of the information recording medium.

The information recording medium is provided with a header area, and the arranging step may include a step of outputting the audio specific data so that the audio specific data is recorded in the header area.

In the arranging step, when there is a defect area on the information recording medium, the rearrangement data for forming a rearrangement area used to rearrange predetermined data according to the defect area is stored in the predetermined area. And the i-th video data element and the i-th audio data element may be arranged so as to be recorded in the recording unit.

The step of arranging, when a defective area exists in the information recording medium, shift data for forming a shift area used for shifting predetermined data in accordance with the defective area is the predetermined recording unit. And the i-th video data element and the i-th audio data element may be arranged to be recorded.

  According to the present invention, the data size of the video unit data, the video unique data, the filling data, and the filling data unique data is equal to an integral multiple of the sector unit of the information recording medium. Thereby, when the user performs editing such as partial deletion of the video, it becomes possible to access the frame to be edited at high speed, so that editing can be performed at high speed.

  According to the present invention, the metadata element and the audio data element are arranged before the video data element in a predetermined recording unit. The metadata element and the auxiliary data element are arranged adjacent to each other within a predetermined recording unit. The auxiliary data element is arranged before the metadata element, the audio data element, and the video data element. With these data arrays of the present invention, high-speed playback operation including high-speed search can be performed.

  FIG. 1 shows a recording apparatus 100 according to an embodiment of the present invention.

The recording apparatus 100 receives the video data 101 and the audio data 102, generates a video data file 111 and an audio data file 112, a video data file 111 and the audio data file 112, and a plurality of video data elements. VE 1 to m _(m is an integer) dividing section 120 that divides into a plurality of audio data elements AE _{1 to m,} is recorded contains the video data element and the audio data elements related to each other in the predetermined recording unit An array unit 130 that generates array data 131 arranged in such a manner and a recording unit 140 that records the array data 131 on the information recording medium 150 are provided. The information recording medium 150 is, for example, an optical disk medium.

  The file generation unit 110 receives the video data 101, the audio data 102, the auxiliary AV data 103, and the real time metadata 104.

Video data 101 represents one scene (video content) of a video shot by a camera. For example, one scene of a video refers to a series of videos shot during a period from when a recording button of a camera is pressed to when the recording stop button is pressed. The video data 101 includes a plurality of video unit data VU _{1 to} VU _n (n is an integer).

  The audio data 102 indicates sound (audio content) related to one scene of the video. The auxiliary AV data 103 refers to a set of video data and audio data compressed at a compression rate higher than that of the video data 101. The real-time metadata 104 indicates additional information (eg, time code, UMID) of the video data 101 and the audio data 102. The UMID will be described later.

The video data file 111 will be described. The file generation unit 110 (FIG. 1) receives video data 101 including a plurality of video unit data VU _{1 to} VU _n and generates a video data file 111.

FIG. 2A shows the video data file 111. The format of the video data file 111 shown in FIG. 2A is called MXF (Material Exchange Format) (MXF standard = SMPTE 377M). The format of the plurality of video unit data _VU 1 _{~VU n} is, for example, D10.

  The video data file 111 includes an MXF file header 161, an MXF file body 162, and an MXF file footer 163. The data sizes of the MXF file header 161, the MXF file body 162, and the MXF file footer 163 are, for example, an integer multiple of 65536 bytes. The MXF file header 161 and the MXF file footer 163 include unique data of the MXF file body 162.

The MXF file body 162 will be described. Video unit data _VU 1 _{~VU n} denotes a value of a picture item. File generating unit 110 (FIG. 1) to each of the plurality of video unit data _VU 1 _{~VU n,} the key data _KV 1 _{~KV n} and length data _LV 1 _{~LV n} is a video-specific data grant (are KLV coded Frame wrapping format video essence). The key data KV _{1 to} KV _n are data for identifying the types of the video unit data VU _{1 to} VU _n (picture items). The length data LV _{1 to} LV _n indicate the length of each of the plurality of video unit data VU _{1 to} VU _n (picture items).

File generating unit 110, to each of the plurality of video unit data _VU 1 _{~VU n,} imparting filler data (fill _data) FV 1 _{~FV n.} The filler data indicates a filler item.

File generating unit 110 (FIG. 1) into a plurality of filler data _FV 1 _{~FV n} respectively, to impart the key data _KF 1 _{~KF n} and length data _LF 1 _{~LF n} is unique data of filler data. The key data KF _{1 to} KF _n are data for identifying a plurality of filler data FV _{1 to} FV _n (filler items) from each other. The length data LF _{1 to} LF _n indicate the lengths of the plurality of filler data FV _{1 to} FV _n (filler items).

Video unit data VU _i (i is an integer satisfying 1 ≦ i ≦ n), key data KV _i , length data LV _i , filler data FV _i , key data KF _i , and length data LF _i are summed The data size is equal to the size of an integral multiple (for example, an integral multiple of 2048 bytes) of the information recording medium 150 (FIG. 1). The filler data FV _i is filling data given to the video unit data VU _i in order to adjust the total data size to be equal to an integral multiple of the sector unit. When the format of the video unit data VU _i is, for example, DV-Picture, a VAUX data item and its unique data are added to the video unit data VU _i . In the case of MPEG-Long GOP, the length of the video unit data VU _i varies from frame to frame, but the size of the filler data FV _i is related to the video unit data VU _i and the video unit data VU _i. The total size of the plurality of types of data to be given is set to be an integral multiple of the sector unit.

  The audio data file 112 will be described. The file generation unit 110 (FIG. 1) receives the audio data 102 and generates an audio data file 112.

FIG. 2B shows the audio data file 112. The format of the audio data file 112 shown in FIG. 2B is called MXF. The format of the audio data 102 is, for example, LPCM.

  The audio data file 112 includes an MXF file header 171, an MXF file body 172, and an MXF file footer 173. The data size of each of the MXF file header 171, the MXF file body 172, and the MXF file footer 173 is, for example, an integer multiple of 65536 bytes. The MXF file header 171 and the MXF file footer 173 include unique data of the MXF file body 172.

  The file generation unit 110 (FIG. 1) adds key data KA and length data LA, which are audio-specific data, to the audio data 102 (a clip-wrapping audio essence coded in KLV is obtained for the entire clip). The key data KA is data for identifying the audio data 102 (sound item). The length data LA indicates the length of the audio data 102 (sound item). These key data KA and length data LA are included in the MXF file header 171 instead of the MXF file body 172.

  The file generation unit 110 (FIG. 1) adds filler data (filling data) FA to the audio data 102.

  The file generation unit 110 assigns key data KFA and length data LFA, which are unique data of the filler data, to the filler data FA. The key data KFA is data for identifying the filler data FA. The length data LFA indicates the length of the filler data FA.

  The total data size of the audio data 102, filler data FA, key data KFA, and length data LFA is, for example, an integer multiple of 65536 bytes. In this case, the filler data FA is filling data given to the audio data 102 in order to adjust the total data size to be an integral multiple of 65536 bytes.

  2B is an audio data file for one channel, and the file generation unit 110 receives the audio data 102 for the number of channels and generates the audio data file 112 for the number of channels.

The auxiliary AV data file 113 will be described. The file generation unit 110 (FIG. 1) receives auxiliary AV data 103 including a plurality of content packages CP _{1 to} CP _m (m is an integer), and generates an auxiliary AV data file 113.

  FIG. 2C shows the auxiliary AV data file 113. The format of the auxiliary AV data file 113 shown in FIG. 2C is called MXF.

  The auxiliary AV data file 113 includes an MXF file header 181, an MXF file body 182, and an MXF file footer 183. The data size of each of the MXF file header 181, the MXF file body 182 and the MXF file footer 183 is, for example, an integer multiple of 65536 bytes. The MXF file header 181 and the MXF file footer 183 include unique data of the MXF file body 182.

The MXF file body 182 will be described. The file generation unit 110 (FIG. 1) attaches key data and length data, which are unique data, to items included in each of the plurality of content packages CP _{1 to} CP _m . For example, to describe the contents package CP _1, denoted by the key data KSI and length data LSI system item _{SI 1A} the auxiliary AV data 103 includes, for generating a system item SI _1. Further, the picture essence Pe ₁ is generated by attaching the key data KPe and the length data LPe to the picture essence Pe _1A included in the auxiliary AV data 103. Also, the sound essence Se ₁ is generated by attaching the key data KSe and the length data LSe to the sound essence Se _1A included in the auxiliary AV data 103.

A plurality of contents package _CP 1 ~ CP _m includes system item _SI 1 _{~SI m,} picture essence _Pe 1 -PE _m and sound essence _Se 1 _{~Se m} respectively. Picture essence _Pe 1 -PE _m and sound essence _Se 1 _{~Se m} respectively include video data and audio data compressed at a higher compressibility than the video data 101. System item _SI 1 _{~SI m} are specific data of a plurality of contents packages _CP 1 ~ CP _m.

Picture essence Pe _m is MPEG-4 elementary stream, for example. Content package CP _m includes a sound essence Se _m of several channels minutes. The total data size of the system item SI _m and the picture essence Pe _m is, for example, 6 × 65536 bytes. The size of the sound essence Se _m is, for example, 32768 bytes.

Each element included in the MXF file body 182 is divided based on the reference annual ring period of the annual ring format. Each element has data for an integral multiple of the reference annulus period. The annual ring format will be described later. When the frame frequency is, for example, 59.94 Hz, 29.97 Hz, or 23.98 Hz, the reference annulus period is 2.0 × 1.001 = 2.002 seconds. The reference annulus period is 2.0 seconds when the frame frequency is, for example, 50 Hz, 25 Hz, or 24 Hz. Picture essence _Pe 1 -PE _m each includes a highly compressed video data of about 2 seconds (e.g. 2.002 seconds or 2.0 seconds) corresponding to the reference annulus period.

  The real-time metadata file 114 will be described. The file generation unit 110 (FIG. 1) receives real-time metadata 104 including a plurality of frames 0 to d (d is an integer), and generates a real-time metadata file 114.

  FIG. 2D shows the real-time metadata file 114. The format of the real-time metadata file 114 shown in FIG. 2D is called BiM (Binary format for Multimedia description streams). Details of BiM are described in an ISO / IEC FDIS 15938-1 standard called MPEG7, and detailed description of BiM is omitted in this specification for the sake of simplicity. The real-time metadata file 114 includes a BiM file header 191 and a BiM file body 192 (the BiM file footer does not exist). The BiM file header 191 includes unique data (such as the number of frames) of the BiM file body 192. The BiM file body 192 includes a plurality of frames 0 to d. Similar to the MXF file body 182 (FIG. 2C), each element included in the BiM file body 192 is divided on the basis of the reference annual ring period of the annual ring format.

The format of the plurality of frames 0 to d is called FUU (Fragment Update Unit). The data size of each of the plurality of frames 0 to d is 6144 bytes, for example. Each of the plurality of frames 0 to d includes a metadata item (LTC, UMID, KLV packet, etc.). Also, each of the plurality of frames 0 to d includes ARIB metadata and extended real-time metadata (Extended Real-Time M).
etadata).

  The dividing unit 120 (FIG. 1) receives the video data file 111, the audio data file 112, the auxiliary AV data file 113, and the real-time metadata file 114 output from the file generating unit 110.

  The dividing unit 120 divides the header, body, and footer of the video data file 111, the audio data file 112, and the auxiliary AV data file 113 from each other. The dividing unit 120 divides the header and body of the real-time metadata file 114.

The dividing unit 120 divides the MXF file body 162 shown in FIG. 2A into a plurality of video data elements VE _{1 to} VE _m shown in FIG. 3A (p and q shown in FIG. 3A are integers satisfying p <q <n). . The MXF file body 162 is divided so that, for example, each video data element includes video unit data in an amount that allows a playback image of 2 seconds to be obtained.

The dividing unit 120 divides the MXF file body 172 shown in FIG. 2B into audio data 102, key data KFA, length data LFA, and filler data FA. The dividing unit 120 divides the audio data 102 into a plurality of audio data elements AE _{1 to} AE _m shown in FIG. 3B.

Each of the plurality of audio data elements AE _{1 to} AE _m is associated with one of the plurality of video data elements VE _{1 to} VE _m . For example, the audio data element AE ₁ is to be reproduced at the same time as the data in the range synchronized with the video unit data VU _{1 to} VU _p included in the video data element VE _{1 in} the audio data 102 (ie, the video data element VE _1. Audio data). The dividing unit 120 divides the MXF file body 172 for the number of channels.

The dividing unit 120 divides the MXF file body 182 shown in FIG. 2C into a plurality of auxiliary AV data elements SE _{1 to} SE _m shown in FIG. 3C.

Each of the plurality of auxiliary AV data elements SE _{1 to} SE _m is associated with one of the plurality of video data elements VE _{1 to} VE _m . For example, the auxiliary AV data element SE ₁ is high-compression video data obtained by compressing the video unit data VU _{1 to} VU _p included in the video data element VE ₁ and high-compression audio data related thereto.

The dividing unit 120 divides the BiM file body 192 shown in FIG. 2D into a plurality of real-time metadata elements RE _{1 to} RE _m shown in FIG. 3D (c and e shown in FIG. 3D are integers satisfying c <e <d). ).

Each of the plurality of real-time metadata elements RE _{1 to} RE _m is associated with one of the plurality of video data elements VE _{1 to} VE _m . For example, the real-time metadata element RE ₁ indicates additional information (eg, time code, UMID) of the video unit data VU _{1 to} VU _p included in the video data element VE ₁ and the audio data element AE ₁ related thereto.

The arrangement unit 130 (FIG. 1) includes video data elements VE _{1 to} VE _m output from the dividing unit 120, audio data elements AE _{1 to} AE _m , auxiliary AV data elements SE _{1 to} SE _m , and real-time metadata element RE _1. ˜RE _m , the respective headers and footers of the video data file 111, the audio data file 112, and the auxiliary AV data file 113 and the header of the real-time metadata file 114 are received, and the elements related to each other are included in the same body annual ring. To be recorded.

  FIG. 4 shows array data 131 generated by the array unit 130. The array data 131 is generated in a format called “annular format”. The “annual ring format” refers to a format obtained by dividing each of a plurality of data files into a plurality of elements and arranging these elements with “annulus” as one unit. “Annual ring” means one unit of an annual ring format. There are three types of “annual rings”: “Body Annulus”, “Header Annulus”, and “Footer Annulus”.

  Arrangement data 131 includes m body annual rings (first body annual ring 201 to m-th body annual ring 202), footer annual ring 203, and header annual ring 204.

The first body annual ring 201 includes an auxiliary AV data element SE ₁ , a real-time metadata element RE ₁ , rearrangement data RA ₁ for forming a rearrangement area, audio data elements AE ₁ and video data elements VE _{1 for the} number of channels. and a shift data SA ₁ for forming a shift area.

The m-th body annual ring 202 includes an auxiliary AV data element SE _m , a real-time metadata element RE _m , rearrangement data RA _m for forming a rearrangement area, audio data elements AE _{m for the} number of channels, and video data elements VE _m. And shift data SA _m for forming the shift region is included in this order of arrangement. Audio data elements AE _m corresponding to the number of channels are arranged in the order of channel numbers.

The footer annual ring 203 includes auxiliary AV data element footer data SE _f , rearrangement data RA _f for forming rearrangement areas, audio data element footer data AU _{f for} the number of channels, video data element footer data VE _f and shift areas. The shift data SA _f for forming is included in an array in this order. The auxiliary AV data element footer data SE _f is data included in the MXF file footer 183 (FIG. 2C). The audio data element footer data AU _f is data included in the MXF file footer 173 (FIG. 2B). The video data element footer data VE _f is data included in the MXF file footer 163 (FIG. 2A).

The header annual ring 204 includes auxiliary AV data element header data SE _h , real-time metadata element header data RE _h , rearrangement data RA _h for forming a rearrangement area, audio data element header data AE _{h for} the number of channels, video The data element header data VE _h and the shift data SA _h for forming the shift area are included in this order. The auxiliary AV data element header data SE _h is data included in the MXF file header 181 (FIG. 2C). The real-time metadata element header data RE _h is data included in the MXF file header 191 (FIG. 2D). The audio data element header data AE _h is data included in the MXF file header 171 (FIG. 2B) (the audio data element header data AE _h includes key data KA and length data LA that are audio specific data). The video data element header data VE _h is data included in the MXF file header 161 (FIG. 2A).

  Each annual ring (first body annual ring 201 to m-th body annual ring 202, footer annual ring 203, header annual ring 204) may include reserve area data for forming a reserved area for recording additional data in the future.

  Each annual ring (first body annual ring 201 to m-th body annual ring 202, footer annual ring 203, header annual ring 204) is recorded so as to start from the head sector of the ECC block. Each element is recorded starting at the ECC block boundary and ending at the ECC block boundary. In FIG. 4, the boundary of the ECC block is indicated by ▲.

  The recording unit 140 (FIG. 1) includes a recording head and a recording head control unit that controls the recording head. The recording unit 140 receives the array data 131 output from the array unit 130, irradiates the information recording medium 150 with a laser beam 141 corresponding to the contents of the array data 131, and records the array data 131 on the information recording medium 150. . If the information recording medium 150 is a magnetic recording medium, the recording unit 140 applies a magnetic field according to the contents of the array data 131 to the information recording medium 150.

FIG. 5A shows an information recording medium 150 on which annual ring format array data 130 is recorded. The information recording medium 150 includes a body annual ring area 211 in which the first to m-th body annual rings 201 to 202 are recorded, a footer annual ring area 213 in which the footer annual ring 203 is recorded, and a header annual ring area in which the header annual ring 204 is recorded. 214 is formed. The positional relationship among the body annual ring region 211, the footer annual ring region 213, and the header annual ring region 214 is arbitrary. Since the rearrangement data RA 1 _-m , RA _f , RA _h , shift data SA 1 _-m , SA _f , SA _h are empty data, the rearrangement data RA 1 _{-m of} the information recording medium 150, No specific data is recorded in the area where RA _f , RA _h , shift data SA 1- _m , SA _f , SA _h are arranged. Here, an area where the rearrangement data RA _m and the shift data SA _m are arranged will be described.

Rearrangement area RA corresponding to the rearranged data RA _m, the auxiliary AV data element SE _m, real time metadata element RE _m, audio data element AE _m correctly data at such time the defect area (data overwritten to the recording area This is an area for recording data corresponding to a defective area when there is an area that cannot be written. The data is moved in units of data size that is an integer multiple of ECC units (or an integer multiple of sector units), for example. The size of the rearrangement area RA is, for example, 131072 bytes. As shown in FIG. 5B, for example, when a defective area (× mark) is detected in the region where the auxiliary AV data respectively element SE _m and audio data element AE _m is recorded, the auxiliary AV data element SE _m and audio The data scheduled to be recorded in the defect area of each data element AE _m is recorded in the rearrangement area RA.

Shift area SA corresponding to the shift data SA _m, when the video data element VE _m is recorded area in the defect area (area where data correctly can not be written in such as during data overwriting) is present, the video data element VE _m This is an area for shifting and recording data in the latter half. The data is shifted in units of data size that is an integer multiple of ECC units (or an integer multiple of sector units), for example. The size of the shift area SA is, for example, an integral multiple of 65536 bytes (for example, a data size of 5 percent of the video data element VE _m ). As shown in FIG. 5B, when a defective area (x mark) is detected in the area where the video data element VE _m is recorded, the partial data of the video data element VE _m scheduled to be recorded in the defective area is defective. is recorded by shifting the normal recording area adjacent to the end regions, accordingly, another partial data of video data elements VE _m was reserved recording in the recording area of the behind the defective area is shifted to the back To be recorded. Data in the second half of the size of only the video data element VE _m defect area is recorded by shifting the shift area SA, a new recording area VE _{new new} recording video data element VE _m is formed. The detection of the defective area, the rearrangement of data, and the shift are performed, for example, when the recording apparatus 100 includes a detection unit that detects a defective area where data cannot be correctly recorded, and the arrangement unit 130 detects the defective area. Is performed by adjusting the arrangement pattern of the arrangement data 130.

In addition, the real-time metadata element RE _m (FIG. 5A) includes a UMID (Unique Material Identifier) as additional information. The UMID is an identifier for uniquely identifying the AV element and the unit data included in the AV element. The UMID has a byte string of 32 bytes or 64 bytes, for example.

A UMID having a 32-byte byte string is called a basic UMID (Basic UMID). The basic UMID is used to identify the AV element. The AV element is a compressed or uncompressed video data element, a compressed or uncompressed audio data element, multi-channel data, single channel data, or the like. In this embodiment, for example, the video data element VE _m shown in FIG. 5A is used. And the audio data element AE _m associated with the video data element VE _m .

A UMID having a 64-byte byte string is referred to as an extended UMID (Extended UMID). The extended UMID is used for identifying unit data included in the AV element in addition to the identification of the AV element. Unit data is data indicating video in a predetermined data unit, such as video clip data or one frame data included in an edited video data element in a fully packaged state. a video unit data VU _n shown in 3A.

  The basic UMID includes a globally unique identification value for identifying the AV element. This identification value is, for example, a value obtained by combining the time when the AV element is generated and the MAC (Media Access Control) address of the device that generated the AV element.

  The basic UMID is used to identify the AV element, but may be used to identify other data, for example, auxiliary data elements (data essence, subtitle data, carousel data, etc.). Further, an identification value may be assigned to the basic UMID so that the video data element and the audio data element synchronized with the video data element are identified as one group of elements. Further, an identification value may be assigned to the basic UMID so as to identify video clip data composed of one frame data, an edited video data element in a completely packaged state, and the like. By using the basic UMID, data of an arbitrary length can be identified.

  The extended UMID is used for identifying unit data included in the AV element in addition to the identification of the AV element. An example of the format of the extended UMID is shown in FIG. 5C. The extended UMID 241 illustrated in FIG. 5C includes a basic UMID 242 and a source pack 243. The data size of the extended UMID 241 is, for example, 64 bytes. The data size of each of the basic UMID 242 and the source pack 243 is, for example, 32 bytes. The basic UMID 242 is included in the extended UMID 241 as an identifier for identifying the AV element. The source pack 243 includes time data 244, position data 245, and user data 246 indicating initial generation conditions of unit data included in the AV data element.

The time data 244 indicates the time (year / month / day and time) when the unit data was first generated. The data size of the time data 244 is 8 bytes, for example. By making the time indicated by the time data 244 different for each unit data, the unit data can be identified. For example, when the unit data identified using the extended UMID 241 is frame data, the time data is set so that the time recorded as the time data 244 is counted faster than the frame rate. The time indicated by 244 can be made different for each frame data.

  The position data 245 indicates geographical position information (for example, altitude, latitude and longitude) of the place where the unit data was first generated. The data size of the position data 245 is, for example, 12 bytes. When the position data 245 indicates altitude, latitude, and longitude, the data size of each data indicating altitude, data indicating latitude, and data indicating longitude is, for example, 4 bytes. The position data 245 may indicate the position of the photographer who captured the video, or may indicate the position of the shooting target. Further, GPS data obtained from a GPS (Global Positioning System) receiver may be used as the position data 245. The GPS receiver can be externally connected or built into the imaging device.

  The user data 246 indicates data related to a user (for example, a photographer) who first generated unit data. User data 246 includes country code 247, organization code 248 and user code 249. The data size of the user data 246 is 12 bytes, for example. The data size of each of the country code 247, the organization code 248, and the user code 249 is 4 bytes, for example.

  The country code 247 is a character string indicating the home country of the organization to which the user belongs. For example, according to ISO 3166-1, us (United States), jp (Japan), uk (United Kingdom), de (Federal Republic of Germany), kr ( (Republic of Korea).

  The organization code 248 is a character string representing the organization to which the user belongs. By combining the country code 247 and the organization code 248, the organization to which the user belongs can be specified worldwide. By registering the organization code 248 in advance in the SMPTE (Society of Motion Picture and Television Engineers) Registration Authority, it is possible to avoid the organization code 248 from being duplicated in the same country.

  The user code 249 is a code assigned to the user, and is arbitrarily assigned to the user by the organization to which the user belongs.

  Note that the user data 246 may be configured in another format for identifying a freelancer that does not belong to a specific organization.

  Note that once the data included in the basic UMID 242 and the source pack 243 is determined in order to uniquely identify the AV element and the unit data included in the AV element, the contents thereof are not changed.

Since the real-time metadata element RE _m (FIG. 5A) includes an identifier such as a basic UMID as additional information, the video data element VE _m and the audio data element AE _m (FIG. 5A) related to the video data element VE _m It can be uniquely identified. Thus, even when the video data element VE _m and the audio data element AE _m are transmitted to various users around the world via a network or the like and edited, the video data element VE _m and the audio data element AE _m are identified. I can do it.

Also, real time metadata element RE _m is, when containing an identifier such as expansion UMID241 including source pack 243, the video data element VE _m and audio data element AE _m plus video data element VE _m comprises video unit Data VU _n (FIG. 3A) can be uniquely identified globally.

In addition, since the real-time metadata element RE _m includes an identifier such as the extended UMID 241, various editing operations are facilitated. For example, during playback of the video unit data VU _n, also edited as to display a map showing the shooting location on a part of the display screen, may be stored map data around the world in advance in the editing device, the position data 245 This can be easily performed by the map data indicating the specified position being read by the editing device.

In the present invention, the elements such as the video data elements VE 1 to _m and the audio data elements AE 1 to _m are arranged at the sector boundary of the information recording medium 150. As described above, the total data size of the video unit data VU _i , key data KV _i , length data LV _i , filler data FV _i , key data KF _i , and length data LF _i is the information recording medium. Equal to an integral multiple of 150 sectors. As a result, the head of the frame included in each of the video unit data VU 1 to _n is arranged at the sector boundary. As a result, when the user performs partial deletion of the video, it can be realized by performing deletion in units of sectors, so data movement does not occur, and partial deletion editing is performed at high speed only by changing the management information of the file system. I can do it.

In the present invention, the header annual ring 204 includes auxiliary AV data element header data SE _h , real-time metadata element header data RE _h , audio data element header data AE _{h for} the number of channels, and video data element header data VE _h . . Since each header includes data of recorded time (duration), the contents are determined at the end of recording. By writing the header annual ring in a different area from the body annual ring after the body annual ring recording is completed, the seek operation during recording can be reduced. Further, it is possible to perform respective header data by arranging intensively header annulus 204, the reading of the header data (especially real time metadata element header data RE _h) at a high speed.

In the present invention, the audio data element header data AE _h includes key data KA and length data LA which are audio specific data. Since the length data is determined at the end of recording of the audio data, the seek operation can be reduced by arranging it in the header. Even if the first to mth body annual rings 201 to 202 do not include the key data KA and the length data LA, the first to mth Data included in the body annual rings 201 to 202 can be reproduced.

  Note that a video data file having the same format as the audio data file 112 shown in FIG. 2B may be generated based on the video data 101. Such a video data file is a data file in which video data is arranged instead of the audio data shown in FIG. 2B. In this case, the unique data indicates data related to video data. This video data file is divided into a plurality of video data elements in the same manner as the audio data element shown in FIG.

  Note that the audio data 102 may include a plurality of audio unit data divided in predetermined data units, and an audio data file having the same format as the video data file 111 shown in FIG. 2A may be generated. Such an audio data file is a data file in which audio unit data is arranged instead of the video unit data shown in FIG. 2A. In this case, the unique data indicates data relating to audio unit data. This audio data file is divided into a plurality of audio data elements like the video data element shown in FIG.

FIG. 6A shows the j-th body annual ring 221 (j is an integer satisfying 1 ≦ j ≦ m).
In the j-th body annual ring 221, the real-time metadata element RE _j and the 4-channel audio data element AE _j are arranged in front of the video data element VE _{j in the} playback direction. In FIG. 6, other elements are omitted for simplification of description. FIG. 6B shows a body annual ring 227 for comparison. In the body annual ring 227, the real-time metadata element RE _j and the 4-channel audio data element AE _j are arranged behind the video data element VE _{j in the} playback direction.

In the j-th body annual ring 221, the data reproduction start (display start) becomes possible when the pickup starts reading data from the head of the video data element VE _j . At this time, since all the real-time metadata elements RE _j and the 4-channel audio data elements AE _j in the j-th body annual ring 221 are stored in the buffer memory of the playback device, data is read from the head of the video data element VE _j. This is because the real-time metadata element RE _j , the 4-channel audio data element AE _j, and the video data element VE _j can be reproduced at the same time.

In the body annual ring 227 shown in FIG. 6B, the reproduction of data starts when the pickup starts reading data from the beginning of the audio data element AE _j of the fourth channel. If the video data element VE _j in the body annual ring 227, the real-time metadata element RE _j, and the audio data element AE _j of the first to third channels are not stored in the buffer memory, the real-time metadata element RE _j and the four-channel This is because the audio data element AE _j and the video data element VE _j cannot be reproduced simultaneously.

For example, when the data format is the DV format, each element in the annual ring includes data for 2 seconds, 1 ECC block is 64 KB, the real-time metadata element RE _j is 6 ECC blocks, the audio data element AE _j is 3 ECC blocks, The video data element VE _j is about 100 ECC blocks. As described above, since the video data element VE _j has the largest data size at the same time, the real-time metadata element RE _j and the 4-channel audio data element AE _j are arranged in front of the video data element VE _j. If you are, you can make the data playback start time faster. For this reason, it is possible to shorten the time from when the user instructs the playback apparatus to start playback until the video, audio, and additional information are actually output from the monitor and the speaker.

FIG. 7 shows an auxiliary AV data element SE _j and a real-time meta from a plurality of body annual rings (jth body annual ring 221, j + 1th body annual ring 222, gth body annual ring 223 (g is an integer satisfying j + 1 <g ≦ m)). The pickup access procedure for reading out the data element RE _j is shown. In FIG. 7, some elements are omitted for simplification of description.

When the audio data element AE _j and the video data element VE _j recorded on the information recording medium 150 are searched at high speed, the audio data element AE _j and the video data element VE _j are not reproduced but the auxiliary AV data is reproduced. Element SE _j is reproduced. This is because the auxiliary AV data element SE _j has a higher compression rate than the video data element VE _{j and} can be read from the information recording medium 150 at high speed. In the case of performing a high-speed search, in addition to the video, the time code and UMID included in the real-time metadata element RE _j are displayed on the screen so that a predetermined scene can be easily detected. For this reason, by picking up the auxiliary AV data element SE _j and the real-time metadata element RE _j adjacent to each other and recording them, skipping the pickup between the auxiliary AV data element SE _j and the real-time metadata element RE _j is performed. And the auxiliary AV data element SE _j and the real-time metadata element RE _j can be read from the information recording medium 150 at high speed.

When the auxiliary AV data element SE _j includes high-compression audio data, a predetermined scene can be detected while listening to the audio output during high-speed search.

  FIG. 8 is a diagram for explaining the data reproduction start procedure from the high-speed search.

FIG. 8A shows a j-th body annual ring 221, a j + 1-th body annual ring 222, and a g-th body annual ring 223. In FIG. 8, some elements are omitted for simplicity of explanation. In the j-th to g-th body annual rings 221 to 223, the auxiliary AV data elements SE _{j to} g are arranged in front of the video data elements VE _j to _{g in the} playback direction. FIG. 8B shows body annual rings 224 to 226 for comparison. In the body annual rings 224 to 226, each of the auxiliary AV data elements SE _{j to g} is arranged behind the video data elements VE _j to _{g in the} playback direction.

With reference to FIG. 8A, in the high-speed search using the auxiliary AV data element SE _j in the j-th body annual ring 221, the pickup normally reads ahead at the time when the user designates a specific scene. The auxiliary AV data element SE _j indicating the scene is accessed earlier. In order to read the video specified by the user from the main video data element VE _j , the pickup accesses the video data element VE _j . If the auxiliary AV data element SE _j includes high-compression audio data, a predetermined scene can be detected while listening to the audio output during high-speed search. In addition, by including the real-time metadata element RE _j , metadata can also be output during a high-speed search. For this reason, when outputting not only video data but also audio data and metadata, the real-time metadata element RE _j is also accessed.

Referring to FIG. 8B, in order to access the video data element VE _j corresponding to the image designated by the user at the time when the user designates a specific scene, as shown in FIG. It is necessary to access a distance longer than the distance. This is because in FIG. 8B, necessary data is recorded before the auxiliary AV data element SE _j .

As shown in FIG. 8 (a), by leaving disposed at the top auxiliary AV data element SE _j in the body annulus, it can be quickly output of an main part of the video data from the high speed search.

  FIG. 9 is a diagram for explaining which body annulus includes data in the vicinity of the boundary when the data file is divided into elements at the ECC block boundary before and after the mark.

Data A shown in FIG. 9 represents auxiliary AV data elements SE _j and SE _{j + 1} , and data B and C represent video data elements VE _j and VE _{j + 1} , respectively.

  Data B shows a data configuration when the video data file 111 is divided at a position before the mark position and separated from the mark position by a data size that is an integral multiple of the ECC block unit of the information recording medium 150.

Data C shows a data configuration when the video data file 111 is divided at a position after the mark position and separated from the mark position by a data size that is an integral multiple of the ECC block unit of the information recording medium 150.

Such division processing is performed by the dividing unit 120 (FIG. 1). In order to specify the position corresponding to the head of the auxiliary AV data element SE _{j + 1 in} the video data file 111, the dividing unit 120 marks the corresponding position. Each auxiliary AV data element is obtained by dividing the MXF file body 182 (FIG. 2C) based on the reference annual ring period of the annual ring format. The dividing unit 120 marks the position corresponding to the head position of the auxiliary AV data element SE _{j + 1 in} the video data file 111 (head position of the reference annulus period).

Each video data element is obtained by dividing the MXF file body 162 (FIG. 2A) on the basis of the reference annulus period of the annulus format. Also in the dividing operation shown in FIG. 9, the video data file 111 is divided on the basis of the reference annual ring period. The start byte position VE _SBP (i) of the video data element, which is the division position of the video data file 111, is obtained by VE _SBP (i) = int [{P _VE (i × Na)} / 65536] × 65536. Here, P _VE (x) is the byte position from the beginning of the MXF file body, and is the start position of the frame data of frame number x (x = 1, 2, 3,...). i is a serial number assigned to each body annual ring (i = 1, 2, 3,...). Na is the number of frames per reference annual ring period. The video data file 111 is divided so that the size of the divided video data element is an integral multiple of 65536 bytes.

The data B will be described. When the dividing unit 120 divides the video data file 111, the dividing unit 120 divides the video data 231 corresponding to the terminal portion of the auxiliary AV data element SE _j so as to be included in the first half of the video data element VE _{j + 1.} To do.

The data C will be described. When the dividing unit 120 divides the video data file 111, the dividing unit 120 divides the video data 232 corresponding to the head of the auxiliary AV data element SE _{j + 1} so as to be included in the latter half of the video data element VE _j. To do.

FIG. 10A is a diagram illustrating an access operation to the j-th body annual ring 221 and the j + 1-th body annual ring 222 when the video data file 111 is divided as data B. FIG. Video data 231 corresponding to the terminal portion of the auxiliary AV data element SE _j is included in the first half of the video data element VE _{j + 1} . At the time of data reproduction, after the head data of the auxiliary AV data element SE _j (including auxiliary AV data 233 related to the video data 231) of the j-th body annual ring 221 is read, the auxiliary AV data element of the j + 1 body annual ring 222 SE _{j + 1} is accessed and read, and video data element VE _{j + 1} is accessed and data is read.

FIG. 10B is a diagram for explaining an access operation to the j-th body annual ring 221 and the j + 1-th body annual ring 222 when the video data file 111 is divided like data C. FIG. Video data 232 corresponding to the head of auxiliary AV data element SE _{j + 1} is included in the latter half of video data element VE _j . At the time of data reproduction, the auxiliary AV data element SE _j of the j-th body annual ring 221 is read, and then the auxiliary AV data element SE _{j + 1} (including the auxiliary AV data 234 related to the video data 232) of the j + 1 body annual ring 222 is accessed. Then, the video data element VE _j is accessed to read the data.

Thus, when the access operations of the pickup shown in FIGS. 10A and 10B are compared, the movement distance of the pickup shown in FIG. 10A is the movement distance of the pickup shown in FIG. You can see that it is much shorter. For this reason, when the auxiliary AV data element and the video data element are played back simultaneously, the access time becomes shorter when the video data file 111 is divided by the dividing procedure shown by data B in FIG. If the auxiliary AV data element and the video data element can be reproduced at the same time, the auxiliary AV data element is sent to a remote playback device using a network or the like while the video data element is displayed on the monitor. The data element and the auxiliary AV data element can be reproduced while being synchronized.

  When the video file is divided, if the mark position matches the boundary of the ECC block, the video file may be divided at the boundary of the ECC block.

  FIG. 11 is a diagram for explaining which body annulus includes data near the boundary when the data file is divided into elements at the ECC block boundary before and after the mark.

Data A1 shown in FIG. 11 represents video data elements VE _j and VE _{j + 1} , and data B1 and C1 represent audio data elements AE _j and AE _{j + 1} (or real-time metadata elements RE _j and RE _{j + 1} ), respectively.

  The data B1 is obtained by dividing the audio data file 112 (or metadata file 114) at a position before the mark position and separated from the mark position by an integer multiple of the ECC block unit of the information recording medium 150. The data structure in the case is shown.

  The data C1 is obtained by dividing the audio data file 112 (or the metadata file 114) at a position after the mark position and separated from the mark position by an integer multiple of the ECC block unit of the information recording medium 150. The data structure in the case is shown.

Such division processing is performed by the dividing unit 120 (FIG. 1). In order to specify the position corresponding to the head of the video data element VE _{j + 1 in} the audio data file 112 (or the metadata file 114), the dividing unit 120 adds a mark to the corresponding position. Each video data element is obtained by dividing the MXF file body 162 (FIG. 2A) on the basis of the reference annual ring period of the annual ring format. The dividing unit 120 puts a mark at a position corresponding to the head position of the video data element VE _{j + 1} (the head position of the reference annulus period) in the audio data file 112 (or the metadata file 114).

Each audio data element is obtained by dividing the audio data file 112 on the basis of the start frame data start time of the video element. Also in the dividing operation shown in FIG. 11, the audio data file 112 is divided based on the start time of the first frame data of the video element. The start frame data start time VE _ST (i) of the video element is obtained from VE _ST (i) = T _VE {VE _SBP (i)}. Here, T _VE (y) is the start time of the frame corresponding to the start byte position y of the video data element.

The start byte position AE _SBP (i) of the audio data element that is the division position of the audio data file 112 is AE _SBP (i) = int [{k × Fs × VE _ST (i) + (65536-1)} / 65536. ] × 65536. Here, k is the byte length per sample data (for example, 2 bytes or 3 bytes). Fs is a sampling frequency (for example, 48 kHz). The audio data file 112 is divided so that the size of the divided audio data element is an integral multiple of 65536 bytes.

  Each real-time metadata element is obtained by dividing a real-time metadata file 114 having a BiM file body with reference to the start frame data of the video element. Also in the dividing operation shown in FIG. 11, the real-time metadata file 114 is divided based on the start frame data of the video element.

The frame number VE _SFN (i) of the start frame data of the video element is obtained from VE _SFN (i) = N _VE {VE _SBP (i)}. Here, N _VE (y) is the frame number of the frame corresponding to the start byte position y of the video data element.

The start byte position RE _SBP (i) of the real-time metadata element, which is the division position of the real-time metadata file 114, is RE _SBP (i) = int [{6144 × VE _SFN (i) + (65536-1)} / 65536. ] × 65536. The real-time metadata file 114 is divided so that the size of the divided real-time metadata element is an integral multiple of 65536 bytes.

The data B1 will be described. When the dividing unit 120 divides the audio data file 112 (or the real-time metadata file 114), the audio data (or the real-time metadata) corresponding to the video data 235 at the end of the video data element VE _j ) 237 is included in the first half of the audio data element AE _{j + 1} (or real-time metadata element RE _{j + 1} ).

The data C1 will be described. When the dividing unit 120 divides the audio data file 112 (or real-time metadata file 114), the audio data (or real-time metadata) corresponding to the video data 236 at the head of the video data element VE _{j + 1} is divided. ) 238 is included in the latter half of the audio data element AE _j (or real-time metadata element RE _j ).

FIG. 12A is a diagram for explaining an access operation to the j-th body annual ring 221 and the j + 1-th body annual ring 222 when the audio data file 112 and the real-time metadata file 114 are divided as in the data B1. Audio data (or real-time metadata) 237 corresponding to video data 235 at the end of video data element VE _j is divided so as to be included in the first half of audio data element AE _{j + 1} (or real-time metadata element RE _{j + 1} ). Yes.

At the time of data reproduction, after the real-time metadata element RE _j and audio data element AE _{j of} the j-th body annual ring 221 are read, the real-time metadata element RE _{j + 1} and audio data element AE _{j + 1 of} the j + 1-th body annual ring 222 are The video data element VE _j is read out.

FIG. 10B is a diagram for explaining an access operation to the j-th body annual ring 221 and the j + 1-th body annual ring 222 when the audio data file 112 and the real-time metadata file 114 are divided like the data C1. Audio data (or real-time metadata) 238 corresponding to video data 236 at the head of video data element VE _{j + 1} is divided so as to be included in the latter half of audio data element AE _j (or real-time metadata element RE _j ). Yes.

At the time of data reproduction, after the real-time metadata element RE _j and audio data element AE _{j of} the j-th body annual ring 221 are read, the real-time metadata element RE _{j + 1} and audio data element AE _{j + 1 of} the j + 1-th body annual ring 222 are read.
Are read out, and the video data element VE _{j + 1} is read out.

  Thus, when the access operations of the pickups shown in FIGS. 12A and 12B are compared, the movement distance of the pickup shown in FIG. 12B is the movement distance of the pickup shown in FIG. You can see that it is much shorter. When playing back a real-time metadata element, an audio data element, and a video data element at the same time, it is better to divide the real-time metadata element and the audio data element so that they are arranged before the video data element. Shorter.

  In addition, by dividing the video data file, audio data file, and real-time metadata file in units of ECC blocks, when editing the video data file, audio data file, and real-time metadata file independently, There is no rewriting of data.

  Also, when video data and audio data of the main part are reproduced from an arbitrary point by dividing the audio data file and the real-time metadata file on the basis of the division time of the video data, not on the basis of the auxiliary AV data. In addition, the pickup access processing can be reduced.

  When dividing an audio data file or a real-time metadata file, if the mark position coincides with an ECC block boundary, the audio data file or the real-time metadata file may be divided at the ECC block boundary.

  According to the recording apparatus, information recording medium, and recording method of the present invention, the data size obtained by adding the video unit data, the video unique data, the filling data, and the filling data unique data is an integral multiple of the sector unit of the information recording medium. Is equal to Thereby, when the user performs editing such as partial deletion of the video, it becomes possible to access the frame to be edited at high speed, so that editing can be performed at high speed. As described above, the present invention is useful in a recording apparatus and a recording method for recording video data and audio data on an information recording medium, an information recording medium on which video data and audio data are recorded, and the like.

  According to the recording apparatus, information recording medium, and recording method of the present invention, the metadata element and the audio data element are arranged before the video data element within a predetermined recording unit. The metadata element and the auxiliary data element are arranged adjacent to each other within a predetermined recording unit. The auxiliary data element is arranged before the metadata element, the audio data element, and the video data element. With these data arrays of the present invention, high-speed playback operation including high-speed search can be performed. As described above, the present invention is useful in a recording apparatus and a recording method for recording video data and audio data on an information recording medium, an information recording medium on which video data and audio data are recorded, and the like.

FIG. 1 is a diagram showing a recording apparatus 100 according to an embodiment of the present invention. FIG. 2A shows a video data file 111. FIG. 2B shows an audio data file 112. FIG. 2C shows the auxiliary AV data file 113. FIG. 2D shows a real-time metadata file 114. FIG. 3A shows a plurality of video data elements VE _{1 to} VE _m . FIG. 3B shows a plurality of audio data elements AE _{1 to} AE _m . FIG. 3C shows a plurality of auxiliary AV data elements SE _{1 to} SE _m . FIG. 3D shows a plurality of real-time metadata elements RE ₁ -RE _m . FIG. 4 is a diagram showing array data 131 generated by the array unit 130. FIG. 5A is a diagram showing an information recording medium 150 on which arrangement data 130 in an annual ring format is recorded. FIG. 5B shows the rearrangement region RA and the shift region SA. FIG. 5C is a diagram showing the extended UMID 241. (A) is a figure showing j-th body annual ring 221 (b) is a figure showing body annual ring 227 for comparison. FIG. 7 is a diagram showing a pickup access procedure for reading the auxiliary AV data element SE _j and the real-time metadata element RE _j from a plurality of body annual rings. FIG. 8 is a diagram for explaining the data reproduction start procedure from the high-speed search. FIG. 9 is a diagram for explaining which body annulus includes data near the boundary when the data file is divided into elements at the ECC block boundary before and after the mark. FIG. 10 is a diagram for explaining an access operation to the j-th body annual ring 221 and the j + 1-th body annual ring 222. FIG. 11 is a diagram for explaining which body annulus includes data near the boundary when the data file is divided into elements at the ECC block boundary before and after the mark. FIG. 12 is a diagram for explaining an access operation to the j-th body annual ring 221 and the j + 1-th body annual ring 222.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Recording device 110 File generation part 120 Dividing part 130 Arrangement part 140 Recording part 150 Information recording medium

Claims (24)

Video specific data for receiving video data including a plurality of video unit data indicating video and audio data related to the video data, and identifying the plurality of video unit data from each other, respectively, in the plurality of video unit data A file generator for generating an attached video data file and generating an audio data file in which audio specific data for identifying the audio data is added to the audio data;
The video data file and the audio data file are received, the video data file is divided into a plurality of video data elements, and the audio data file is divided into a plurality of audio data elements associated with each of the plurality of video data elements. A dividing unit, wherein an i-th video data element of the plurality of video data elements includes a predetermined number of video unit data of the plurality of video unit data;
The i-th audio data element related to the i-th video data element of the plurality of audio data elements and the i-th video data element are recorded in a predetermined recording unit. An arrangement unit for arranging the i-th video data element and the i-th audio data element;
A recording unit for recording the arranged i-th video data element and i-th audio data element on an information recording medium;
The file generation unit further receives metadata related to the video data and audio data, and further generates a metadata file in which metadata specific data for identifying the metadata is added to the metadata.
The dividing unit divides the metadata file into a plurality of metadata elements related to the plurality of video data elements,
The arrangement unit includes an i-th metadata element related to the i-th video data element and the i-th audio data element among the plurality of metadata elements in the predetermined recording unit. Recording device characterized by being arranged before the second video data element. The file generation unit further receives auxiliary data including compressed video data compressed at a compression rate higher than the compression rate of the video data, and gives auxiliary data specific data for identifying the auxiliary data to the auxiliary data Generate additional auxiliary data files,
The dividing unit divides the auxiliary data file into a plurality of auxiliary data elements related to the plurality of video data elements,
The arrangement unit adjoins the i-th auxiliary data element related to the i-th video data element and the i-th metadata element among the plurality of auxiliary data elements in the predetermined recording unit. The recording apparatus according to claim 1 , wherein the recording apparatus is arranged in an array. The recording apparatus according to claim 2 , wherein the i-th auxiliary data element further includes compressed audio data compressed at a compression rate higher than the compression rate of the video unit data. The recording apparatus according to claim 2 , wherein the arrangement unit arranges the i-th auxiliary data element before the i-th video data element. The recording apparatus according to claim 2 , wherein the arrangement unit arranges the auxiliary data element before the metadata element, the audio data element, and the video data element. Video specific data for receiving video data including a plurality of video unit data indicating video and audio data related to the video data, and identifying the plurality of video unit data from each other, respectively, in the plurality of video unit data A file generator for generating an attached video data file and generating an audio data file in which audio specific data for identifying the audio data is added to the audio data;
The video data file and the audio data file are received, the video data file is divided into a plurality of video data elements, and the audio data file is divided into a plurality of audio data elements associated with each of the plurality of video data elements. A dividing unit, wherein an i-th video data element of the plurality of video data elements includes a predetermined number of video unit data of the plurality of video unit data;
The i-th audio data element related to the i-th video data element of the plurality of audio data elements and the i-th video data element are recorded in a predetermined recording unit. An arrangement unit for arranging the i-th video data element and the i-th audio data element;
A recording unit for recording the arranged i-th video data element and i-th audio data element on an information recording medium;
The file generation unit further receives auxiliary data including compressed video data compressed at a compression rate higher than the compression rate of the video data, and gives auxiliary data specific data for identifying the auxiliary data to the auxiliary data Generate additional auxiliary data files,
The dividing unit divides the auxiliary data file into a plurality of auxiliary data elements related to the plurality of video data elements,
An i-th auxiliary data element of the plurality of auxiliary data elements is associated with the i-th video data element;
The dividing unit identifies a position corresponding to a head of the i-th auxiliary data element in the video data file;
The division unit is a position before the specified position, and a position separated from the specified position by a data size that is an integral multiple of an ECC block unit of the information recording medium is the i-th video data. A recording apparatus, wherein the video data file is divided so as to be at the head of an element. Video specific data for receiving video data including a plurality of video unit data indicating video and audio data related to the video data, and identifying the plurality of video unit data from each other, respectively, in the plurality of video unit data A file generator for generating an attached video data file and generating an audio data file in which audio specific data for identifying the audio data is added to the audio data;
The video data file and the audio data file are received, the video data file is divided into a plurality of video data elements, and the audio data file is divided into a plurality of audio data elements associated with each of the plurality of video data elements. A dividing unit, wherein an i-th video data element of the plurality of video data elements includes a predetermined number of video unit data of the plurality of video unit data;
The i-th audio data element related to the i-th video data element of the plurality of audio data elements and the i-th video data element are recorded in a predetermined recording unit. An arrangement unit for arranging the i-th video data element and the i-th audio data element;
A recording unit for recording the arranged i-th video data element and i-th audio data element on an information recording medium;
The file generation unit further receives metadata related to the video data and audio data, and further generates a metadata file in which metadata specific data for identifying the metadata is added to the metadata.
The dividing unit divides the metadata file into a plurality of metadata elements related to the plurality of video data elements,
An i th metadata element of the plurality of metadata elements is associated with the i th video data element;
The dividing unit identifies a position corresponding to a head of the i-th video data element in the metadata file;
The division unit is a position after the specified position, and a position separated from the specified position by a data size that is an integral multiple of an ECC block unit of the information recording medium is the i-th metadata. A recording apparatus that divides the metadata file so as to be at the head of an element. Video specific data for receiving video data including a plurality of video unit data indicating video and audio data related to the video data, and identifying the plurality of video unit data from each other, respectively, in the plurality of video unit data A file generator for generating an attached video data file and generating an audio data file in which audio specific data for identifying the audio data is added to the audio data;
The video data file and the audio data file are received, the video data file is divided into a plurality of video data elements, and the audio data file is divided into a plurality of audio data elements associated with each of the plurality of video data elements. A dividing unit, wherein an i-th video data element of the plurality of video data elements includes a predetermined number of video unit data of the plurality of video unit data;
The i-th audio data element related to the i-th video data element of the plurality of audio data elements and the i-th video data element are recorded in a predetermined recording unit. An arrangement unit for arranging the i-th video data element and the i-th audio data element;
A recording unit for recording the arranged i-th video data element and i-th audio data element on an information recording medium;
The dividing unit identifies a position corresponding to a head of the i-th video data element in the audio data file;
The division unit is a position after the specified position, and a position separated from the specified position by a data size that is an integral multiple of an ECC block unit of the information recording medium is the i-th audio data. A recording apparatus, wherein the audio data file is divided so as to be at the head of an element. The I-th video unique data of the video unique data for identifying the I-th (I is an integer) video unit data of the plurality of video unit data is added to the I-th video unit data. Has been
The file generation unit adds filling data and filling data specific data for identifying the filling data to the I-th video unit data,
Data size plus the said I-th video unit data and the I-th video-specific data and the filler data and filler data specific data is equal to an integer multiple of the size of the sector unit of the information recording medium, according to claim 1 The recording apparatus in any one of -8 . The information recording medium is provided with a header area,
The recording apparatus according to claim 1 , wherein the arrangement unit outputs the audio specific data to the recording unit so that the audio specific data is recorded in the header area. The arrangement unit, when a defective area exists in the information recording medium, provides rearrangement data for forming a rearrangement area used for rearranging predetermined data according to the defect area. The recording apparatus according to claim 1, wherein the recording apparatus is arranged together with the i-th video data element and the i-th audio data element so as to be recorded in a recording unit. The array unit uses, as the predetermined recording unit, shift data for forming a shift area used to shift predetermined data in accordance with the defective area when a defective area exists in the information recording medium. The recording apparatus according to claim 1, wherein the recording apparatus is arranged together with the i-th video data element and the i-th audio data element so as to be included and recorded. Video specific data for receiving video data including a plurality of video unit data indicating video and audio data related to the video data, and identifying each of the plurality of video unit data in each of the plurality of video unit data Generating an attached video data file, and generating an audio data file in which audio specific data for identifying the audio data is attached to the audio data;
The video data file and the audio data file are received, the video data file is divided into a plurality of video data elements, and the audio data file is divided into a plurality of audio data elements associated with each of the plurality of video data elements. The i-th video data element of the plurality of video data elements includes a predetermined number of video unit data of the plurality of video unit data; and
The i-th audio data element related to the i-th video data element of the plurality of audio data elements and the i-th video data element are recorded in a predetermined recording unit. Arranging the i th video data element and the i th audio data element;
Recording the arranged i th video data element and i th audio data element on an information recording medium,
The step of generating the file further includes receiving metadata related to the video data and audio data, and further generating a metadata file in which metadata specific data for identifying the metadata is added to the metadata. Including
The step of dividing includes the step of dividing the metadata file into a plurality of metadata elements associated with each of the plurality of video data elements;
In the arranging step, the i-th metadata element related to the i-th video data element and the i-th audio data element among the plurality of metadata elements are arranged in the predetermined recording unit. A recording method comprising the step of arranging before the i-th video data element. The step of generating the file further receives auxiliary data including compressed video data compressed at a compression rate higher than the compression rate of the video data, and adds auxiliary data specific data for identifying the auxiliary data to the auxiliary data. Including the step of generating the attached auxiliary data file,
The step of dividing includes the step of dividing the auxiliary data file into a plurality of auxiliary data elements associated with each of the plurality of video data elements;
In the arranging step, the i-th auxiliary data element related to the i-th video data element and the i-th metadata element of the plurality of auxiliary data elements are adjacent to each other in the predetermined recording unit. The recording method according to claim 13 , comprising a step of arranging them. The recording method according to claim 14 , wherein the i-th auxiliary data element further includes compressed audio data compressed at a compression rate higher than the compression rate of the video unit data. 15. The recording method according to claim 14 , wherein the arranging step includes a step of arranging the i-th auxiliary data element before the i-th video data element. 15. The recording method according to claim 14 , wherein the arranging step includes a step of arranging the auxiliary data element before the metadata element, the audio data element, and the video data element. Video specific data for receiving video data including a plurality of video unit data indicating video and audio data related to the video data, and identifying each of the plurality of video unit data in each of the plurality of video unit data Generating an attached video data file, and generating an audio data file in which audio specific data for identifying the audio data is attached to the audio data;
The video data file and the audio data file are received, the video data file is divided into a plurality of video data elements, and the audio data file is divided into a plurality of audio data elements associated with each of the plurality of video data elements. The i-th video data element of the plurality of video data elements includes a predetermined number of video unit data of the plurality of video unit data; and
The i-th audio data element related to the i-th video data element of the plurality of audio data elements and the i-th video data element are recorded in a predetermined recording unit. Arranging the i th video data element and the i th audio data element;
Recording the arranged i th video data element and i th audio data element on an information recording medium,
The step of generating the file further receives auxiliary data including compressed video data compressed at a compression rate higher than the compression rate of the video data, and adds auxiliary data specific data for identifying the auxiliary data to the auxiliary data. Further including the step of generating the attached auxiliary data file,
The step of dividing includes the step of dividing the auxiliary data file into a plurality of auxiliary data elements associated with each of the plurality of video data elements;
An i-th auxiliary data element of the plurality of auxiliary data elements is associated with the i-th video data element;
The step of dividing includes specifying a position corresponding to a head of the i-th auxiliary data element in the video data file;
The dividing step is a position before the specified position, and a position separated from the specified position by a data size that is an integral multiple of an ECC block unit of the information recording medium is the i-th video. A recording method comprising the step of dividing the video data file so as to be at the head of a data element. Video specific data for receiving video data including a plurality of video unit data indicating video and audio data related to the video data, and identifying each of the plurality of video unit data in each of the plurality of video unit data Generating an attached video data file, and generating an audio data file in which audio specific data for identifying the audio data is attached to the audio data;
The video data file and the audio data file are received, the video data file is divided into a plurality of video data elements, and the audio data file is divided into a plurality of audio data elements associated with each of the plurality of video data elements. The i-th video data element of the plurality of video data elements includes a predetermined number of video unit data of the plurality of video unit data; and
The i-th audio data element related to the i-th video data element of the plurality of audio data elements and the i-th video data element are recorded in a predetermined recording unit. Arranging the i th video data element and the i th audio data element;
Recording the arranged i th video data element and i th audio data element on an information recording medium,
The step of generating the file further includes receiving metadata related to the video data and audio data, and further generating a metadata file in which metadata specific data for identifying the metadata is added to the metadata. Including
The step of dividing includes the step of dividing the metadata file into a plurality of metadata elements associated with each of the plurality of video data elements;
An i th metadata element of the plurality of metadata elements is associated with the i th video data element;
The step of dividing includes a step of identifying a position corresponding to a head of the i-th video data element in the metadata file;
The dividing step is a position after the specified position, and a position separated from the specified position by a data size that is an integral multiple of an ECC block unit of the information recording medium is the i-th meta. A recording method comprising a step of dividing the metadata file so as to be at the head of a data element. Video specific data for receiving video data including a plurality of video unit data indicating video and audio data related to the video data, and identifying each of the plurality of video unit data in each of the plurality of video unit data Generating an attached video data file, and generating an audio data file in which audio specific data for identifying the audio data is attached to the audio data;
The video data file and the audio data file are received, the video data file is divided into a plurality of video data elements, and the audio data file is divided into a plurality of audio data elements associated with each of the plurality of video data elements. The i-th video data element of the plurality of video data elements includes a predetermined number of video unit data of the plurality of video unit data; and
The i-th audio data element related to the i-th video data element of the plurality of audio data elements and the i-th video data element are recorded in a predetermined recording unit. Arranging the i th video data element and the i th audio data element;
Recording the arranged i th video data element and i th audio data element on an information recording medium,
The dividing step includes a step of specifying a position corresponding to a head of the i-th video data element in the audio data file,
The dividing step is a position after the specified position, and a position separated from the specified position by a data size that is an integral multiple of an ECC block unit of the information recording medium is the i-th audio. A recording method comprising a step of dividing the audio data file so as to be at the head of a data element. The I-th video unique data of the video unique data for identifying the I-th (I is an integer) video unit data of the plurality of video unit data is added to the I-th video unit data. Has been
Generating the file includes adding filling data and filling data specific data for identifying the filling data to the I-th video unit data;
Data size plus the said I-th video unit data and the I-th video-specific data and the filler data and filler data specific data is equal to an integer multiple of the size of the sector unit of the information recording medium, according to claim 13 The recording method according to any one of -20 . The information recording medium is provided with a header area,
21. The recording method according to claim 13, wherein the arranging step includes a step of outputting the audio specific data so that the audio specific data is recorded in the header area. In the arranging step, when there is a defect area on the information recording medium, the rearrangement data for forming a rearrangement area used to rearrange predetermined data according to the defect area is stored in the predetermined area. 21. The recording method according to claim 13 , further comprising a step of arranging together with the i-th video data element and the i-th audio data element so as to be recorded in a recording unit. The step of arranging, when a defective area exists in the information recording medium, shift data for forming a shift area used for shifting predetermined data in accordance with the defective area is the predetermined recording unit. The recording method according to any one of claims 13 to 20, further comprising a step of arranging together with the i-th video data element and the i-th audio data element so as to be recorded.

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