JP2008186542A - Recording device, recording method and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten a mounting completion period at the time after a recording medium is injected. <P>SOLUTION: A data stream of a predetermined content is recorded on an optical disk. This data stream is constituted of the predetermined number of clips (raw material data). On the optical disk, there are management information areas for recording the management information such as a disk metafile, an index file, a disk information file, etc. Time code information of final frames of each clip constituting the data stream are described on non-real time metadata related to each clip. When the disk information file is written back to the optical disk at the ejection, final time code information of a final recording clip of the data stream is recorded on the disk information file. Thus, a period till the final time code information is acquired at the injection of optical disk, can be shortened. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a recording apparatus, a recording method, and a recording medium. Specifically, according to the present invention, recording is performed by including the last time code information of the last material data constituting the data stream in the management information recorded in the management information area of the recording medium for recording the data stream of the predetermined content. The present invention relates to a recording apparatus or the like that can shorten the mounting completion time after injecting a medium.

  In recent years, a method has been proposed in which a content data stream such as image data or audio data is recorded non-linearly using a random-accessible recording medium such as an optical disk or a hard disk (for example, see Patent Document 1).

  In this case, the data stream is composed of a predetermined number of material data. A recording medium, such as an optical disc, is provided with a data area, a material information area, and a management information area. Material data is recorded in the data area, material information (metadata) added to each material data is recorded in the material information area, and disc management information is recorded in the management information area. .

Each material information recorded in the material information area includes the last time code information of the corresponding material data. In order to complete the mounting (recording / playback permission) after the optical disk is mounted on the recording device, in addition to acquiring the management information of the entire disk from the management information area, the last of the data stream comprising the material information area It was necessary to obtain the last time code information of the material data.
JP 2006-109160 A

  The material information (metadata) added to the material data includes a lot of metadata related to the material data in addition to information necessary for recording such as final time code information. For example, the metadata includes an LTC change point table that is list information of frames in which changes in LTC (Linear Time Code) are nonlinear in order to improve searchability of material data. Since LTC is a time code, its value normally increases monotonously (changes linearly) frame by frame in the captured image data.

  However, for example, if a plurality of material data are connected by editing work, a part of frames are deleted, or the LTC value itself is edited, the LTC value does not necessarily change linearly. For example, the method of changing the LTC value changes, such as a change from monotonic increase to monotonic decrease. The change point is the frame in which the way the LTC value changes in this way. The LTC change point table is a table of change point frame numbers (FTC) and LTC values. As the number of change points increases, the capacity of the table increases accordingly.

  If the capacity of the material information (metadata) added to the last material data constituting the data stream is large, it takes a long time to obtain the final time code information from the material information, so the mounting is completed. There is a possibility that the time until (recording / playback permission) is significantly delayed. For example, when recording new material data with the time code continued to the last time code of the last material data, if the time until the completion of mounting is greatly delayed as described above, the time until the start of recording is greatly increased. The inconvenience of delay occurs.

  Note that it is conceivable to shorten the mount completion time by reading only the final time code information from the material information added to the last material data. However, since the material information is recorded in, for example, an XML (Extensible Markup Language) format, it is not known whether the information is really effective unless it is read from the beginning to the end. Therefore, it is difficult to read only the final time code information from the material information.

  An object of the present invention is to shorten the mount completion time after injecting a recording medium.

The concept of this invention is
An input unit for inputting material data constituting a data stream of predetermined content;
The material data input to the input unit is recorded in the data area of the recording medium, the material information added to the material data is recorded in the material information area of the recording medium, and the management information of the recording medium is recorded in the recording medium A recording section for recording in the management information area of
In the recording apparatus, the management information recorded in the management information area by the recording unit includes the last time code information of the last material data constituting the data stream of the predetermined content.

  In this invention, material data constituting a data stream of a predetermined content such as an image or sound is input to the input unit. Here, the material data is composed of image data and audio data for a predetermined time, and is, for example, image data and audio data obtained by one imaging process from when the photographer starts imaging to when it ends.

  The material data input to the input unit is recorded in the data area of the recording medium by the recording unit. The recording medium can be randomly accessed, such as an optical disk, a magnetic disk, or a semiconductor memory. This recording medium has a material information area and a management information area in addition to the data area.

  In the material information area, material information added to the material data is recorded by the recording unit. This material information includes, for example, final time code information of material data. In the management information area, management information of the recording medium is recorded. This management information includes the last time code information of the last material data constituting the data stream of the predetermined content described above.

  In the recording apparatus, in order to complete mounting (recording / playback permission) after a recording medium, for example, an optical disk is mounted, the data recorded in the data area together with the management information of the disk recorded in the management information area It is necessary to acquire the last time code information of the last material data constituting the stream.

  By including the final time code information in the management information recorded in the management information area as described above, the final time code information can be obtained at the same time when the disc management information is obtained from the management information area. Since it is not necessary to acquire the final time code information from the information area, it is possible to shorten the mount completion time after the recording medium is injected. In addition, since the time until the last time code information is acquired can be shortened, when new material data is recorded with the time code continuous to the last time code of the last material data, the time until the start of recording can be shortened. it can.

  In the present invention, the recording unit records, for example, in the management information area when new material data is recorded with the time code continued to the last time code of the last material data constituting the data stream of the predetermined content. If the last time code information of the last material data is included in the managed information, the time code is regenerated using this last time code information, and the last material is added to the management information recorded in the management information area. When the final time code information of the data is not included, the time code is regenerated by the final time code information included in the material information added to the last material data recorded in the material information area.

  In this case, even if the last time code information of the last material data is not included in the management information, the time code can be regenerated using the last time code information included in the material information. It is also possible to deal with a recording medium recorded by an old version recording apparatus that does not include the final time code information of the material data.

  In the present invention, for example, when a plurality of data streams are recorded in the data area of the recording medium, the recording unit includes the last information constituting each data stream in the management information recorded in the management information area of the recording medium. The final time code information of the material data is included. In this case, since the time until the last time code information of each data stream is acquired can be shortened, for each data stream, new material data is recorded with the time code continuous with the last time code of the last material data. In this case, the time until the start of recording can be shortened.

  According to the present invention, the management information recorded in the management information area of the recording medium for recording the data stream of the predetermined content includes the last time code information of the last material data constituting the data stream. Mounting completion time after injecting the medium can be shortened.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration example of an optical disc apparatus 110 as an embodiment.

  The optical disk device 110 includes a system control unit 111, an operation input unit 112, a control information input unit 113, a control information output unit 114, an input unit 115, a recording signal processing unit 116, an information processing unit 117, a network interface 118, and a metadata processing unit. 119, a drive control unit 120, a pickup unit 121, a spindle drive unit 122, a reproduction signal processing unit 123, and an output unit 124.

  The system control unit 111 is a control unit that controls the entire optical disc device 110 as indicated by a dotted arrow. The system control unit 111 includes a CPU (Central Processing Unit) 111a, a ROM (Read Only Memory) 111b, and a RAM (Random Access Memory) 111c.

  The CPU 111a functions as a controller that controls the operation of each unit. The ROM 111b stores a control program for controlling the operation of the CPU 111a. The RAM 111c functions as a working area for the CPU 111a. The CPU 111a reads out the control program stored in the ROM 111b as necessary, transfers the read control program to the RAM 111c and develops it, and reads and executes the developed control program, thereby controlling the operation of each unit. To do.

  The operation input unit 112 is configured by an input device such as a keyboard or a button, for example, receives an operation input from the user, and supplies the information to the system control unit 111. The control information input unit 113 receives information other than information related to content such as material data and metadata as control information from the outside of the optical disc device 110 and supplies the control information to the system control unit 111. The control information output unit 114 outputs information other than information related to contents such as material data and metadata supplied to the system control unit 111 to the outside of the optical disc device 110.

  The input unit 115 is a processing unit that receives information related to content supplied from the outside of the optical disc device 110, a material data input unit 115a that receives material data (image data, audio data, etc.) supplied from the outside, and an external device. And a metadata input unit 115b that receives supplied metadata (such as real-time metadata and non-real-time metadata). The material data input unit 115 a supplies the input material data to the recording signal processing unit 116, and the metadata input unit 115 b supplies the input metadata to the recording signal processing unit 116.

  The recording signal processing unit 116 performs signal processing on the material data, metadata, and the like supplied from the input unit 115, and performs processing such as converting each data from a transmission format to a recording format. The recording signal processing unit 116 supplies the data subjected to signal processing to the information processing unit 117.

  The information processing unit 117 performs processing related to editing of material data based on the control of the system control unit 111. For example, the information processing unit 117 includes an information multiplexing unit 117a that multiplexes a plurality of data and an information decomposition unit 117b that decomposes one piece of information into a plurality of pieces of information, and performs processing such as composition and division. The material data and metadata to be edited are supplied from the recording signal processing unit 116, the network interface 118, the drive control unit 120, or the like. When the information processing unit 117 acquires the material data and metadata supplied from each unit, the information processing unit 117 edits the material data and metadata under the control of the system control unit 111, and the edited material data and metadata are transmitted to the network interface 118. , Supplied to the drive control unit 120 or the reproduction signal processing unit 123. Note that metadata editing is performed in the metadata processing unit 119. Therefore, when the metadata is supplied, the information processing unit 117 supplies the metadata to the metadata processing unit 119.

The network interface 118 is an interface connected to a LAN (Local Area Network) such as Ethernet (registered trademark) or the Internet, for example. The network interface 118 acquires material data and metadata from other devices by communicating with a communication device other than the optical disk device 110 connected to the same network, such as a camera, and the acquired material data and metadata. Data and the like are supplied to the information processing unit 117. Further, the network interface 118 supplies material data, metadata, and the like supplied from the information processing unit 117 to other devices via the network. The metadata processing unit 119 is controlled by the system control unit 111 to edit the metadata supplied from the information processing unit 117 and return the edited metadata to the information processing unit 117.
The drive control unit 120 is a processing unit that controls each unit of a drive (not shown) in which the optical disc 130 is mounted in the optical disc apparatus 110. For example, the drive control unit 120 is controlled by the system control unit 111 to control the pick unit 121 and the spindle drive unit 122. The pickup unit 121 performs a process of reading information recorded on the optical disk 130 mounted on the drive and writing information on the optical disk 130. The spindle drive unit 122 controls the drive of the optical disk 130 mounted on the drive.

  Then, the drive control unit 120 controls the pickup unit 121 and the spindle driving unit 122 to supply the data read by the pickup unit 121 to the information processing unit 117. Further, the drive control unit 120 controls the pickup unit 121 and the spindle drive unit 122 to write the data supplied from the information processing unit 117 to the optical disc 130 via the pickup unit 121.

  The pickup unit 121 is controlled by the drive control unit 120 to irradiate the optical disc 130 mounted on the drive with laser light, read out data recorded on the optical disc 130 and supply the read data to the drive control unit 120. Data supplied from the control unit 120 is written on the optical disk 130. At this time, the pickup unit 121 is controlled by the drive control unit 120 and slides in the radial direction with respect to the optical disc 130 to control the access position in the radial direction of the optical disc 130. The spindle drive unit 122 mainly controls the rotational movement of the optical disc 130 mounted in the drive, and controls the access position with respect to the rotation direction of the optical disc 130 by the pickup unit 121.

  The reproduction signal processing unit 123 performs signal processing on the output signal (or reproduction signal) supplied from the information processing unit 117, for example, performs processing such as converting each data from a recording format to a transmission format. . The reproduction signal processing unit 123 supplies the data subjected to the signal processing to the output unit 124.

  The output unit 124 is a processing unit that outputs information related to content to the outside of the optical disc device 110, and a material that outputs material data (image data, audio data, etc.) supplied from the reproduction signal processing unit 123 to the outside. A data output unit 124a and a metadata output unit 124b for outputting metadata (real-time metadata, non-real-time metadata, etc.) supplied from the reproduction signal processing unit 123 to the outside. Note that the output unit 124 may include an output device such as a display or a speaker, and an image or sound based on the material data supplied from the reproduction signal processing unit 123 may be output from the output device.

  FIG. 2 is a schematic diagram illustrating a configuration example of the recording area 30 of the optical disk 130.

  The recording area 30 of the optical disc 130 includes a replacement area 31, file system areas (FS areas) 32A and 32B, a non-real time (NRT) area 33, and a clip area 34. The replacement area 31 is an area used as a substitute for the read / write defective area when a read / write defective area due to scratches, dirt, manufacturing defects, recording life, or the like occurs in other areas. The file system areas 32A and 32B are areas in which management information for managing data recorded in the NRT area 33 and the clip area 34 as files is recorded. The file system areas 32A and 32B constitute a management information area.

  The NRT area 33 is an area for recording non-real time metadata (NRT metadata) that is metadata corresponding to each clip recorded in the clip area 34. The NRT area 33 constitutes a material information area. The clip area 34 is an area for recording data of each clip. A clip is a unit indicating one imaging process until the photographer starts imaging and ends imaging. The clip area 34 constitutes a data area.

  The data of each clip includes, for example, image data, audio data, real time metadata (RT metadata) composed of metadata corresponding to each frame of image data, and low levels of image data and audio data. It consists of proxy data that is resolution data. Data of each clip (image data, audio data) constitutes material data constituting a data stream of predetermined content. For example, when a plurality of pieces of image data are connected by an editing operation, one piece of image data that is the editing result constitutes one piece of clip data. The metadata added to the clip material data includes real-time metadata composed of data that requires real-time characteristics in the reading process and non-real-time metadata composed of data that does not require real-time characteristics in the reading process. Data exists.

  The real-time metadata includes, for example, LTC (Linear Time Code) that specifies the position of the frame of the image signal using predetermined time information such as hours, minutes, and seconds, the frame number of each frame, and the beginning of the file FTC (File Time Code) which is relative position information from the frame, user bits (UB: User Bit) indicating the signal characteristics of the image signal of the frame, and UMID (Unique Material Identifier) which is an ID for identifying the frame , GPS (Global Positioning System) information indicating the position where the image was taken by the video camera, essence marks that are information on the contents of essence data such as image signals and audio signals, ARIB (Association of Radio Industries and Businesses) metadata, There are settings / control information of the video camera that has been imaged.

  The ARIB metadata is metadata for a communication interface such as SDI (Serial Digital Interface) standardized by the standard organization ARIB. The video camera setting / control information is, for example, information such as an IRIS (iris) control value, a white balance / black balance mode, and lens information related to lens zoom and focus.

  Non-real time metadata is metadata for the entire clip. Non-real-time metadata includes, for example, a conversion table in which LTC corresponding to each frame is associated with a frame number (FTC), UMID, GPS information, or other information. A frame is a unit of image data, and is image data corresponding to an image for one screen (or various data corresponding to the image data). The image data of one clip is usually composed of image data of a plurality of frames.

  The above-described real-time metadata and non-real-time metadata may be added to any unit of image data. In the following, a case where real-time metadata is added to image data for each frame and non-real-time metadata is added to image data for each clip will be described.

  That is, in the following, it is assumed that the real-time metadata is frame metadata added to the image data for each frame and includes data corresponding to the added frame. Further, the non-real-time metadata is clip metadata added for each clip to the image data, and includes data corresponding to the entire added clip. Normally, image data is filed for each clip and managed by a file system. In such a case, the non-real-time metadata may be metadata for each file including image data.

  As shown in FIG. 2, in the clip area 34, data of each clip is recorded in order, such as a clip 34A, a clip 34B,. An area in the clip area 34 where no clip has been recorded yet is an unused area 34C. Note that the clip 34A includes a body A including image data and audio data belonging to the clip 34A, footer information F_A, and header information H_A. Similarly, the clip 34B includes a body B including image data and audio data belonging to the clip 34B, footer information F_B, and header information H_B. The clip data is hereinafter simply referred to as a clip.

  In the optical disk 130, each data is managed as a file as shown in FIGS. 3 to 5 based on the management information in the file system areas 32A and 32B. As a file system for managing data recorded on the optical disc 130, any system may be used, for example, UDF (Universal Disk Format), ISO 9660 (International Organization for Standardization 9660), or the like. A dedicated file system may be used.

  In this file system, data recorded on the optical disk 130 is managed by a directory structure and files as shown in FIG. In FIG. 3, a root directory (ROOT) 51 includes a PROAV directory 52 in which information related to material data such as image data and audio data, an edit list indicating the editing result of the material data, and the like are arranged in a lower directory. Provided. In addition, although illustration is abbreviate | omitted in the root directory 51, structure table data etc. are also provided.

  The PROAV directory 52 includes a disc metafile (DISCMETA.XML) 53, an index file (INDEX.XML) 54 including management information for managing all clips and edit lists recorded on the optical disc 130, and a copy thereof. Index file (INDEX.BUP) 55, disc information file (DISCINFO.XML) 56, a duplicate disc information file (DISKINFO.BUP) 57, a clip root directory (CLPR) 58 in which clips are provided in a lower directory, and An edit list root directory (EDTR) 59 in which edit list data is provided in a lower directory is provided.

  The disc metafile 53 describes disc information to be recognized by the user, such as a disc title.

  The index file 54 is a file for managing information on files recorded in the optical disk 130, and clips stored under the clip root directory are described as a clip table. In the clip table, a clip to be managed is designated using UMID. Furthermore, each piece of data constituting the clip is also specified using the respective UMID. The index file manages the edit list in the same manner, and designates the edit list to be managed using the UMID of the edit list.

  The disc information file 56 describes attribute information of the entire disc that is required when the optical disc 130 is mounted. In this embodiment, the disc information file 56 includes the last time code information of the last material data of the material data (clip data) constituting the data frame of the predetermined content recorded on the optical disc 130. The LTC information of the frame is included. The disc information file 56 is described in the XML format.

  In the clip root directory 58, clip data recorded on the optical disc 130 is managed separately for each clip. For example, in the case of FIG. 3, three clips are stored in the clip directory (C0001) 61. The clip directory (C0002) 62 and the clip directory (C0003) 63 are divided into three directories and managed.

  That is, each piece of data of the first clip recorded on the optical disc 130 is managed as a file in a directory under the clip directory 61, and each piece of data of the clip recorded on the optical disc 130 is subordinate to the clip directory 62. Each piece of clip data recorded on the optical disc 130 as a third directory file is managed as a file in a directory below the clip directory 63.

  Also, in the edit list root directory 59, the edit list recorded on the optical disc 130 is managed by being divided into different directories for each editing process. For example, in the case of FIG. 3, four edit lists are edited. The list directory (E0001) 64, the edit list directory (E0002) 65, the edit list directory (E0003) 66, and the edit list directory (E0004) 67 are managed separately.

  That is, the edit list indicating the first editing result of the clip recorded on the optical disc 130 is managed as a file in a directory below the edit list directory 64, and the editing list indicating the second editing result is the edit list directory 65. The edit list showing the third editing result is managed as a file under the edit list directory 66, and the editing list showing the fourth editing result is the edit list directory 67. It is managed as a file in the lower directory.

  In the directory below the clip directory 61 provided in the above-described clip root directory 58, each piece of data of the clip first recorded on the optical disc 130 is provided and managed as a file as shown in FIG.

  In the case of FIG. 4, the clip directory 61 includes a clip information file (C0001C01.SMI) 71 that is a file for managing this clip, and an image data file (C0001V01.MXF) 72 that is a file including the image data of this clip. , Audio data files (C0001A01.MXF to C0001A08.MXF) 73 to 80 which are eight files including audio data of each channel of this clip, and a proxy which is a file including low resolution data corresponding to the image data of this clip Data file (C0001S01.MXF) 81, metadata corresponding to the entire clip, for example, non-real time metadata that does not require real-time properties, such as a conversion table that correlates LTC (Linear Time Code) and frame number A non-real file that contains metadata Im metadata file (C0001M01.XML) 82, which is metadata corresponding to each frame of the image data of this clip, and is a file including real time metadata which is metadata that requires real time property, such as LTC. The real-time metadata file (C0001R01.BIM) 83 and the frame structure of the image data file 72 (for example, information on the compression format for each picture in the MPEG (Moving Picture Experts Group) etc., the offset address from the beginning of the file, etc. A file such as a picture pointer file (C0001I01.PPF) 84, which is a file in which (information) is described, is provided.

  Information included in the non-real-time metadata file 82 will be described. The non-real-time metadata file 82 is additional information for the entire clip that does not require real-time properties regarding an image data file or an audio data file existing in the same clip directory as the non-real-time metadata file 82.

  In the non-real-time metadata file 82, an LTC change point table (LtcChangeTable) that is list information of frames in which changes in UMID and LTC of the clip (clip information file 71) to which the non-real-time metadata file 82 is added becomes nonlinear. Is included. Further, a typical user bit (TypicalUbit) configured by “reel number” which is information for identifying the recording medium on which the clip is recorded is also included. The “reel number” is information used for facilitating clip management, and is information frequently used in VTRs.

  Further, the non-real-time metadata file 82 includes a basic UMID change point table (list information of frames in which the value of basic UMID (Basic) included in the UMID (BodyUmid) of each frame of image data changes). BodyUmidBasicChangeTable), time information change point table (BodyUmidWhenChangeTable) that is a list of frames in which the value of time information (When) of UMID (BodyUmid) of each frame of image data changes, and UMID (BodyUmid) of each frame of image data The position information change point table (BodyUmidWhereChangeTable), which is a list of frames whose position information (Where) value changes, and the UMID (BodyUmid) person information (Who) value of each frame of image data A person information change point table (BodyUmidWhoChangeTable) which is list information is included.

  The non-real-time metadata file 82 also includes a KLV packet table (KlvPacketTable) that is list information of frames to which KLV packets are added. Furthermore, information on the video format of the image data, information on the audio format of the audio data, information on the hardware and software used for data recording and editing, user information, and title information of the clip to which the non-real-time metadata file 82 corresponds In addition, arbitrary memo information (description) and the like are also included.

  In addition, the non-real time metadata file (C0001M01.XML) 82 includes LTC information of the last frame, which is final time code information, as non-real time metadata for each clip.

  The LTC change point table will be described. Since LTC is a time code, its value normally increases monotonously (changes linearly) frame by frame in the captured image data. However, for example, when a plurality of clips are connected by editing work, a part of frames are deleted, or the LTC value itself is edited, the LTC value does not necessarily change linearly. The method of changing the LTC value may change, such as changing from monotonic increase to monotonic decrease (may change non-linearly). A frame in which the manner of changing the LTC value is changed is referred to as a change point. The LTC change point table is a table of change point frame numbers (FTC) and LTC values. This LTC change point table is used, for example, when searching for a frame based on LTC.

  In the case of FIG. 4, image data, proxy data, and real-time metadata, which are data required to be real-time during reproduction, are each managed as one file so that the reading time does not increase.

  The audio data is also required to be real-time during reproduction, but 8 channels are prepared and are managed as different files in order to cope with multi-channel audio such as 7.1 channels.

  The audio data is described as being managed as eight files. However, the present invention is not limited to this, and the number of files corresponding to the audio data may be seven or less, or nine or more. Similarly, image data, proxy data, and real-time metadata may be managed as two or more files, respectively.

  In FIG. 4, non-real-time metadata that does not require real-time property is managed as a file different from real-time metadata that requires real-time property. This is to prevent unnecessary metadata such as image data from being read out during normal playback. By doing so, the processing time of playback processing and the load required for processing can be reduced. Can do.

  Note that the non-real-time metadata file 82 is described in XML (eXtensible Markup Language) format in order to provide versatility. However, the real-time metadata file 83 has a processing time for reproduction processing and a load necessary for the processing. In order to reduce, it is a BIM format file obtained by compiling an XML format file.

  The configuration example of the file of the clip directory 61 shown in FIG. 4 can be applied to all clip directories corresponding to each clip recorded on the optical disc 130. That is, the configuration example of the file shown in FIG. 4 can also be applied to the other clip directory 62 and clip directory 63 shown in FIG.

  Next, an example of a file structure in a directory below the edit list root directory 59 of FIG. 3 will be described. In the directory below the edit list directory 65 provided in the above-described edit list root directory 59, edit list data, which is information relating to the second editing result of each data of the clip recorded on the optical disc 130, is shown in FIG. It is provided and managed as a file as shown.

  In the case of FIG. 5, the edit list directory 65 includes an edit list file (E0002E01.SMI) 91, which is a file for managing the editing result (edit list), and the edited material data (all clip clips used for editing). Edit list that is a non-real-time metadata corresponding to the whole of the material data (the portion extracted as edited data) or a file containing non-real-time metadata newly generated based on the non-real-time metadata Non real-time metadata file (E0002M01.XML) 92, playlist file (E0002P01.SMI) 93, playlist picture pointer file (C0001I01.PPF) 94, playlist image data file (E0002V01.BMX) 95, play Audio data file for list (E0002A01.BMX to E000 2A04.BMX) 96 to 99, playlist proxy data file (E0002S01.BMX) 100, playlist real-time metadata file (E0002R01.BBM) 101, and the like are provided.

  In FIG. 5, non-real-time metadata that does not require real-time property is managed as a file different from real-time metadata that requires real-time property. This is to prevent unnecessary metadata from being read during reproduction of image data or the like using the reproduction procedure (playlist) (during reproduction of the editing result). The processing time of the reproduction process and the load necessary for the process can be reduced.

  The edit list non-real-time metadata file 92 is generated based on the non-real-time metadata of the clip used for editing (non-real-time metadata file existing in a directory below the clip root directory 58) based on the editing result. It is a file that contains new non-real-time metadata. For example, when editing is performed, a portion corresponding to the edited material data is extracted from the non-real time metadata included in the non-real time metadata file 82 in FIG. 4, and the edited material data is extracted using them. New non-real-time metadata for one clip is reconstructed and managed as a non-real-time metadata file for an edit list.

  In other words, new non-real time metadata in which the edited material data is one clip is added to the edited material data, and the non-real time metadata is managed as one edit list non-real time metadata file. . Therefore, the non-real time metadata file for edit list is generated for each editing. The edit list non-real-time metadata file 92 is described in the XML format in order to have versatility.

  Note that the image data, proxy data, and real-time metadata may be managed as a plurality of files, respectively, depending on circumstances. Similarly, the number of files corresponding to audio data may be 3 or less, or 5 or more.

  The configuration example of the files in the edit list directory 65 shown in FIG. 5 can be applied to all edit lists (edit results). That is, since the configuration example of the file shown in FIG. 5 can also be applied to the other edit list directories 64, 66, or 67 shown in FIG.

  FIG. 6 shows a detailed configuration example of the system control unit 111 in the optical disc apparatus 110 shown in FIG.

  The system control unit 111 includes a control unit 161, a clip processing unit 171, a reference edit list search unit 172, an edit list update unit 173, an index file update unit 174, a disc information file update unit 175, an inconsistency processing unit 176, and an input control unit. 181, a communication control unit 182, a write control unit 183, a read control unit 184, an edit update processing control unit 185, and an output control unit 186.

Each unit is divided into three layers. A control unit 161 that controls the entire system control unit 111 constitutes the highest layer, and includes a clip processing unit 171, a reference edit list search unit 172, an edit list update unit 173, and an index file. The update unit 174, the disc information file update unit 175, and the inconsistency processing unit 176 constitute a second layer that executes the target processing, and includes an input control unit 181, a communication control unit 182, a write control unit 183, and a read control. The unit 184, the edit update processing control unit 185, and the output control unit 186 constitute the lowest layer that controls processing units other than the system control unit 111 of the optical disc apparatus 110.
The control unit 161 starts and ends the processing executed by the clip processing unit 171, the reference edit list search unit 172, the edit list update unit 173, the index file update unit 174, the disc information file update unit 175, or the inconsistency processing unit 176. Control the linkage with other processes. Further, the control unit 161 controls the above-described units based on operation input information supplied from the operation input unit 112 and control information supplied from the control information input unit 113. Further, the control unit 161 supplies the control information to the control information output unit 114, thereby outputting the control information to the outside of the optical disc apparatus 110 via the control information output unit 114. In addition, the control unit 161 controls the output control unit 186 to control processing related to output of material data and metadata.

  The clip processing unit 171 controls the input control unit 181, the communication control unit 182, the write control unit 183, the read control unit 184, and the edit update processing control unit 185, and the clip image data, audio data, real-time metadata, proxy Processing related to recording, reproduction, and editing of data and non-real-time metadata is performed.

  More specifically, the clip processing unit 171 controls the input unit 115 and the recording signal processing unit 116 via the input control unit 181 to process the material data and metadata input from the outside of the optical disc apparatus 110. To the unit 117. Also, the clip processing unit 171 controls the network interface 118 via the communication control unit 182 to supply the material data and metadata supplied from other devices to the information processing unit 117, or from the information processing unit 117. The output editing result is supplied to another device.

  Further, the clip processing unit 171 controls the drive control unit 120 via the write control unit 183 and causes the editing result output from the information processing unit 117 to be written on the optical disc 130. In addition, the clip processing unit 171 controls the drive control unit 120 via the read control unit 184 to read the material data and metadata recorded on the optical disc 130 and supply them to the information processing unit 117. Further, the clip processing unit 171 controls the information processing unit 117 and the metadata processing unit 119 via the edit update processing control unit 185 to perform processing related to editing of material data and metadata.

  The reference edit list search unit 172 controls the read control unit 184 and the edit update processing control unit 185 to perform processing related to search of an edit list that refers to a clip to be destructively edited. More specifically, the reference edit list search unit 172 controls the drive control unit 120 via the read control unit 184 to read the edit list recorded on the optical disc 130 and supplies it to the information processing unit 117. Let Further, the reference edit list search unit 172 controls the information processing unit 117 and the metadata processing unit 119 via the edit update processing control unit 185, refers to the read edit list, and refers to the clip to be destructively edited. A process for searching for an edit list to be executed is executed.

  The edit list update unit 173 controls the write control unit 183 and the edit update processing control unit 185, and performs processing related to the update of the edit list searched by the reference edit list search unit 172. More specifically, the edit list update unit 173 controls the drive control unit 120 via the write control unit 183 to write the updated edit list onto the optical disc 130. Further, the edit list update unit 173 controls the information processing unit 117 and the metadata processing unit 119 via the edit update processing control unit 185, and updates the edit list referring to the destructively edited clip according to the destructive edit. Let

  Here, in destructive editing, when editing material data and metadata recorded on the optical disc 130, the material data and metadata to be edited are updated. Incidentally, in non-destructive editing, the material data and metadata to be edited are left as they are, and data indicating the editing result is newly generated.

  The index file update unit 174 controls the write control unit 183, the read control unit 184, and the edit update processing control unit 185, and performs processing related to the update of the index file 54 (see FIG. 3) recorded on the optical disc 130. More specifically, the index file update unit 174 controls the drive control unit 120 via the write control unit 183 to write the updated index file on the optical disc 130. Also, the index file update unit 174 controls the drive control unit 120 via the read control unit 184 to read the index file recorded on the optical disc 130 and supply it to the information processing unit 117. Furthermore, the index file update unit 174 controls the information processing unit 117 and the metadata processing unit 119 via the edit update processing control unit 185 to update the index file according to the executed recording and editing.

  The disc information file update unit 175 controls the write control unit 183, the read control unit 184, and the edit update processing control unit 185, and performs processing related to the update of the disc information file 56 (see FIG. 3) recorded on the optical disc 130. Do. More specifically, the disc information file update unit 175 controls the drive control unit 120 via the write control unit 183 to write the updated disc information file on the optical disc 130.

  The disc information file update unit 175 controls the drive control unit 120 via the read control unit 184 to read out the disc information file recorded on the optical disc 130 and supply it to the information processing unit 117. Further, the disc information file update unit 175 controls the information processing unit 117 and the metadata processing unit 119 via the edit update processing control unit 185, and updates the disc information file according to executed recording, reproduction, and editing. Let

  The inconsistency processing unit 176 controls the writing control unit 183 and the edit update processing control unit 185, for example, based on a user instruction or the like, for example, does not update other files that refer to the destructively edited file. Processing related to output and recording of inconsistency information that is generated when consistency between files is intentionally prevented. More specifically, the inconsistency processing unit 176 controls the drive control unit 120 via the write control unit 183 and causes the generated inconsistency information to be written on the optical disc 130.

  Further, the inconsistency processing unit 176 controls the information processing unit 117 and the metadata processing unit 119 via the edit update processing control unit 185, acquires the generated inconsistency information, and supplies it to the control unit 161. . Further, the inconsistency processing unit 176 supplies the inconsistency information generated in the information processing unit 117 and the metadata processing unit 119 to the control unit 161, for example, outside the optical disc apparatus 110 via the control information output unit 114. Or output from the output unit 124 to the outside of the optical disc apparatus 110 via the output control unit 186.

  The input control unit 181 controls the input unit 115 and the recording signal processing unit 116 to execute processing for receiving material data and metadata input to the input unit 115 from the outside of the optical disc apparatus 110. The communication control unit 182 controls the network interface 118 and performs processing related to communication with other devices. The write control unit 183 controls the drive control unit 120 to perform processing related to writing data to the optical disc 130.

  The read control unit 184 controls the drive control unit 120 to perform processing related to reading data recorded on the optical disc 130. The edit update processing control unit 185 controls the information processing unit 117 and the metadata processing unit 119, and performs processing related to editing, updating, and the like of material data and metadata according to recording, reproduction, editing, and the like to be executed. The output control unit 186 controls the reproduction signal processing unit 123 and the output unit 124, and performs processing related to output of the data output from the information processing unit 117 to the outside of the optical disc device 110.

  The operation of the optical disc apparatus 110 shown in FIG. 1 will be briefly described.

  First, an example of recording operation will be described. Material data and metadata input from the input unit 115 are supplied to the recording signal processing unit 116. The recording signal processing unit 116 performs processing such as converting the material data and metadata supplied from the input unit 115 from a transmission format to a recording format. The material data and metadata subjected to the signal processing are supplied to the information processing unit 117. The material data and metadata acquired by the network interface 118 are supplied to the information processing unit 117.

  Material data and metadata supplied from the recording signal processing unit 116 or the network interface 118 supplied to the information processing unit 117 are processed as necessary, and then supplied to the drive control unit 120, and the optical disk is picked up by the pickup unit 121. 130 is written.

  Next, an example of playback operation will be described. Material data and metadata read from the optical disc 130 by the pickup unit 121 are supplied to the information processing unit 117 via the drive control unit 120. The material data and metadata supplied to the information processing unit 117 are supplied to another device via the network interface 118, for example. The material data and metadata supplied to the information processing unit 117 are supplied to the reproduction signal processing unit 123. In the reproduction signal processing unit 123, processing such as conversion from a recording format to a transmission format is performed on the material data and metadata supplied from the information processing unit 117. The material data and metadata subjected to the signal processing are output from the output unit 124 to the outside.

  Next, an example of editing operation of material data and metadata recorded on the optical disc 130 will be described. The material data and metadata to be edited read from the optical disk 130 by the pickup unit 121 are supplied to the information processing unit 117 via the drive control unit 120. In the information processing unit 117 and the metadata processing unit 119, the read material data and metadata are edited. Then, the edited material data and metadata are supplied to the drive control unit 120 and written onto the optical disc 130 by the pickup unit 121.

  When the optical disk 130 is inserted into an unillustrated drive and processing such as recording, reproduction, and editing of material data and metadata is performed, when the optical disk 130 is ejected, The disk metafile (DISCMETA.XML), index file (INDEX.XML), disk information file (DISCINFO.XML), and non-real-time metadata updated according to the process are written back.

  In this case, the disc information file (DISCINFO.XML) is the last time code information of the last material data (final recording clip) among the material data (clip) constituting the data frame of the predetermined content recorded on the optical disc 130. Is written back with the LTC information of the last frame included.

  The flowchart of FIG. 7 shows the flow of a disk information file (DISCINFO.XML) write-back process by the system control unit 111. First, in step ST1, the system control unit 111 starts a write-back process, and proceeds to step ST2. In step ST2, the system control unit 111 determines whether or not material data (clip data) constituting the above-described data frame is newly recorded.

  When material data is newly recorded, in step ST3, the system control unit 111 determines the time of the last frame of the recorded material data (the last material data when there are a plurality of material data recorded). From the code (TC) information and user bit (UB) information, the LTC value (lastLtc value) and U bit value (ubit value) of the last frame are recorded in the disc information file (DISCINFO.XML). The system control unit 111 moves to step ST4 after the process of step ST3.

  When the material data is not newly recorded, the system control unit 111 adds the time code (TC) of the last frame of the last material data (clip data) to the disc information file (DISCINFO.XML) in step ST5. Determine whether information exists. When the time code (TC) information of the last frame exists in the disc information file (DISCINFO.XML), the system control unit 111 adds the LTC value (lastLtc value) of the last frame to the disc information file (DISCINFO.XML). Without performing the process of recording the U bit value (ubit value), the process immediately proceeds to step ST4.

  On the other hand, when the last frame time code (TC) information does not exist in the disc information file (DISCINFO.XML), the system control unit 111 proceeds to step ST6. In step ST6, the system control unit 111 obtains the LTC value (lastLtc value) of the last frame from the LTC information (LtcChange / Value value) of the last frame in the non-real-time metadata related to the last material data (clip). Generate and record in a disc information file (DISCINFO.XML).

  After the process of step ST6, the system control unit 111 moves to step ST7. In step ST7, the system control unit 111 determines whether or not a typical Ubit exists in the non-real-time metadata related to the last material data (clip). When the TypicalUbit does not exist, the system control unit 111 immediately moves to step ST4. On the other hand, when the TypicalUbit exists, the system control unit 111 generates the LTC value (lastLtc value) and U-bit value (ubit value) of the last frame from the TypicalUbit value in Step ST8, and the disc information file (DISCINFO .XML). The system control unit 111 moves to step ST4 after the process of step ST8.

  In step ST4, the system control unit 111 records the final reproduction position in the disc information file (DISCINFO.XML). Then, in step ST9, the system control unit 111 serializes the disk information file (DISCINFO.XML), that is, restores the original format obtained by analyzing the disk information file (DISCINFO.XML), and then returns the disk information file (DISCINFO.XML) to the original format. ) Is written back to the optical disk 130. Thereafter, the system control unit 111 ends the write-back process in step ST10.

  FIG. 8 shows an example of recording a data stream on the optical disc 130. In FIG. 8, the data stream of the predetermined content recorded on the optical disc 130 is composed of a clip (Clip1) and a clip (Clip2). In this case, the clip (Clip2) is the last recorded clip (the last material data constituting the data stream), and lastLtc = 23010000, umid = 1234. After the clip (Clip2) is recorded on the optical disc 130, when the optical disc 130 is ejected and the disc information file (DISCINFO.XML) is written back, the disc information file (DISCINFO.XML) As shown in FIG. 9, the LTC frame (lastLtc), user bit information (ubit), and umid of the last frame of the clip (Clip2) are described.

  FIG. 10 shows a description example of non-real-time metadata relating to a clip (Clip2) which is the last recorded clip. LastLtc, ubit, and umid described in the disc information file (DISCINFO.XML) correspond to the descriptions in the non-real-time metadata. In this case, the last frame LTC information (lastLtc) of the disc information file (DISCINFO.XML) is described in the same format as the last frame LTC information (LtcChange / value) in the non-real-time metadata.

  The optical disk apparatus 110 shown in FIG. 1 can handle the optical disk 130 recorded by the old version optical disk apparatus without any problem, and satisfies the upward compatibility.

  That is, as shown in FIG. 11A, when data is written back by an old version optical disc apparatus, the final time code information is not described in the disc information file (DISCINFO.XML). As shown in FIG. 11B, when the optical disc 130 in which the final time code information is not described in the disc information file (DISCINFO.XML) is injected into the optical disc device 110 (new version optical disc device) described above, At the time of FM mounting, the time code information of the last frame of the last recorded clip is acquired from the metadata (non-real time metadata) for each clip. Thereafter, as shown in FIG. 11C, when the optical disc 130 is ejected from the optical disc apparatus 110, the final time code information is described in the disc information file (DISCINFO.XML) and written back to the optical disc 130.

  Further, the optical disc 130 in which the disc information file (DISCINFO.XML) is written back in the processing flow of FIG. 7 described above can be handled without any problem in the old version optical disc apparatus, and satisfies the lower level compatibility.

  That is, as shown in FIG. 12A, in the above-described optical disc apparatus 110 (new version optical disc apparatus), a disc information file (DISCINFO.XML) in which final time code information is described is written back onto the optical disc 130 at the time of ejection. It is. As shown in FIG. 12B, when this optical disc 130 is injected into an old version optical disc apparatus, the last time code information (extension section) described when the optical disc apparatus reads the disc information file (DISCINFO.XML). ) Is incomprehensible and is ignored. Thereafter, as shown in FIG. 12C, when the optical disc 130 is ejected, for example, a disc information file (DISCINFO.XML) in which the final time code information is not written is written back on the optical disc 130.

  FIG. 13 shows an outline of the disk injection (mounting) process in the optical disk apparatus 110 shown in FIG.

  By injecting the optical disk 130 into a drive (not shown), it is possible to start recording other than during time code regeneration. Note that the time code mode includes not only a regeneration mode that is continuous with the final time code, but also a mode in which the time code is given by a free-run counter.

  When the optical disk 130 is injected into the drive and the mounting of the file system (FS) is completed, FM mounting is started. In this FM mounting process, the disk metafile (DISCMETA.XML), index file (INDEX.XML), disk information file (DISCINFO.XML), and non-real-time metadata are read (READ) from the optical disk 130 ( The analysis (Parse) is performed. Regarding the analysis, the disk metafile (DISCMETA.XML) and the index file (INDEX.XML) are the first, and then the disk information file (DISCINFO.XML) is analyzed and the non-real-time metadata is analyzed.

  After the analysis of the disc information file (DISCINFO.XML) is completed, the FM mount is completed when the final time code information of the last material data constituting the data stream is acquired. Completion of FM mounting enables playback, recording start at time code regeneration, recording completion processing, and the like.

  Even after the FM mount is completed in this manner, the analysis of the non-real time metadata is continuously performed, and when this analysis is completed, thumbnail display or the like becomes possible.

  The flowchart of FIG. 14 shows the flow of FM mount processing by the system control unit 111. First, in step ST11, the system control unit 111 starts FM mount processing, and proceeds to step ST12. In step ST12, the system control unit 111 reads the disk metafile (DISCMETA.XML), the index file (INDEX.XML), the disk information file (DISCINFO.XML), and non-real-time metadata from the optical disk 130 (read). : READ).

  Next, in step ST13, the system control unit 111 analyzes the disk metafile (DISCMETA.XML) and the index file (INDEX.XML) (parse). In step ST14, the system control unit 111 analyzes the disc information file (DISCINFO.XML).

  Next, in step ST15, the system control unit 111 determines whether or not the last time code information of the last recorded clip (LTC information of the last frame) exists in the disc information file. When the final time code information exists in the disc information file, the system control unit 111 acquires the time code for regenerating the time code based on the final time code information existing in the disc information file in step ST16.

  In this case, when a new clip is recorded by making the time code continuous with the final time code of the last recorded clip, the time code is regenerated by the final time code information existing in the disc information file. After step ST16, the system control unit 111 ends the FM mount process in step ST17.

  If the last time code information does not exist in the disc information file in step ST15, the system control unit 111 proceeds to step ST18. In step ST18, the system control unit 111 analyzes the non-real time metadata related to the last recorded clip, and in step ST16, acquires a time code for time code regeneration.

  In this case, when a new clip is recorded with the time code continuous with the final time code of the final recorded clip, the time code is regenerated by the final time code information existing in the non-real-time metadata related to the final recorded clip. become.

  In the optical disc apparatus 110 described above, a clip (material) that constitutes a data frame of a predetermined content recorded on the optical disc 130 is included in the disc information file (DISCINFO.XML) written back to the optical disc 130 when the optical disc 130 is ejected. Data) includes the LTC information of the last frame of the last recorded clip (the last material data constituting the data stream) (see FIG. 9).

  In the optical disc apparatus 110 described above, when the optical disc 130 in which the disc information file (DISCINFO.XML) includes the LTC information (final time code information) of the final frame is injected, the FM mount process performs the time The time code for code regeneration is acquired based on the final time code information existing in the disc information file (see FIG. 14).

  Therefore, as in the prior art, it is not necessary to analyze the non-real time metadata related to the last recorded clip and acquire the time code for time code regeneration, and the state of the optical disk 130, that is, the non-real time related to the last recorded clip. The FM mount completion time can be shortened regardless of the metadata capacity. Therefore, for example, when a new clip is recorded with the time code continued to the last time code of the last recorded clip, the time until the start of recording can be shortened.

  Further, in the optical disc apparatus 110 described above, when a new clip is recorded with a time code continued to the last time code of the last recorded clip, the last time code information (LTC of the last frame) is recorded in the disc information file (DISCINFO.XML). Information) is included, the time code is regenerated using the final time code information, but the final time code information (LTC information of the final frame) is not included in the disc information file (DISCINFO.XML). Is to regenerate the time code based on the last time code information included in the non-real-time metadata related to the last recorded clip, and the old version of the disc information file (DISCINFO.XML) does not include the last time code information. Optical display It can be handled without problems the optical disc 130 recorded by the apparatus.

  In the above description, only one data frame of a predetermined content is recorded on the optical disc 130 (see FIG. 8). In this case, as shown in FIG. 9, the disc information file (DISCINFO.XML) describes the last time code information of the last recorded clip in the one data frame.

  In the optical disc apparatus 110 shown in FIG. 1 described above, a plurality of content data streams can be recorded on the optical disc 130. In this case, the disc information file (DISCINFO.XML) describes the last time code information of the last recorded clip in the plurality of data frames.

  FIG. 15 shows an example of recording a data stream on the optical disc 130. This recording example is an example in which data streams of two contents A and B are recorded. In FIG. 15, the data stream of content A is composed of a clip (Clip1) and a clip (Clip4). In this case, the clip (Clip4) is the last recorded clip (the last material data constituting the data stream of the content A), and lastLtc = 23010000, umid = 1234. In FIG. 15, the data stream of content B is composed of a clip (Clip2), a clip (Clip3), and a clip (Clip5). In this case, the clip (Clip 5) is the last recorded clip (the last material data constituting the data stream of the content B), and lastLtc = 01050020, umid = 5678. In FIG. 15, the clip number indicates, for example, the recording order.

  After the clip (Clip5) is recorded on the optical disc 130, when the optical disc 130 is ejected and the disc information file (DISCINFO.XML) is written back, the disc information file (DISCINFO.XML) As shown in FIG. 16, the LTC information (lastLtc), user bit information (ubit), and umid of the last frame of the clip (Clip4) that is the last recorded clip of the data stream of the content A are described, and the data of the content B In this state, LTC information (lastLtc), user bit information (ubit), and umid of the last frame of the clip (Clip5), which is the last recorded clip of the stream, are described.

  By recording the last time code information of the last recorded clip of multiple data streams in the disc information file (DISCINFO.XML) as described above, the time until the last time code information of each data stream is acquired is shortened. Therefore, for any data stream, when a new clip is recorded with the time code continued to the last time code of the last recorded clip, the time until the start of recording can be shortened.

  As described above, when the last time code information of the last recorded clip of a plurality of data streams is recorded in the disc information file (DISCINFO.XML), the last time code information of the last recorded clip in the last recorded data stream is the highest. You may make it describe in high rank. The data stream selected by default when the optical disc 130 is injected may be a data stream in which the last time code information of the last recorded clip is recorded at the top.

  In this case, if you are in a mode in which a new clip is recorded with the last time code of the last recorded clip being recorded, the time code is made to be continuous with the last time code of the last recorded clip of the data stream selected by default. A new clip is recorded.

  Further, as described above, when a plurality of content data streams can be recorded on the optical disc 130, the optical disc apparatus 110 selects one of the plurality of existing data streams according to the menu setting after the injection of the optical disc 130. It is possible. Further, a data stream for which no more clips are to be recorded may be expressed by removing the final time code information from the disc information file (DISCINFO.XML).

  In the above embodiment, the final time code information of the data stream recorded on the optical disc 130 is described in the disc information file (DISCINFO.XML). It may be recorded by being included in other management information such as (INDEX.XML).

  In the above-described embodiment, the recording medium is an optical disk. However, the present invention is naturally applicable even if the recording medium is a magnetic disk, a semiconductor memory, or the like.

  The present invention can shorten the mount completion time after injecting a recording medium, and can be applied to an optical disc apparatus or the like that records a data stream of content such as image data and audio data on an optical disc.

1 is a block diagram illustrating a configuration example of an optical disc device as an embodiment. FIG. It is a schematic diagram which shows the structural example of the recording area of an optical disk. It is a schematic diagram which shows the example of the directory structure of the file recorded on the optical disk. It is a schematic diagram which shows the example of the directory structure of the file recorded on the optical disk. It is a schematic diagram which shows the example of the directory structure of the file recorded on the optical disk. It is a block diagram which shows the detailed structural example of the system control part which comprises an optical disk apparatus. It is a flowchart which shows the example of the write-back process of a disc information file (DISCINFO.XML). It is a figure which shows the example of recording of the data stream to an optical disk. It is a figure which shows the example of a description of the disc information file (DISCINFO.XML) containing the last time code information. It is a figure which shows the example of a description of the non real-time metadata which concerns on the last recording clip. FIG. 10 is a diagram (1/3) for explaining upward compatibility in extension of a disc information file (DISCINFO.XML). FIG. 3C is a diagram (2/3) for explaining upward compatibility in the extension of the disc information file (DISCINFO.XML). FIG. 3C is a diagram (3/3) for explaining upward compatibility in the extension of the disc information file (DISCINFO.XML). It is a figure (1/3) for demonstrating the downward compatibility in the extension of a disk information file (DISCINFO.XML). FIG. 2C is a diagram (2/3) for explaining backward compatibility in the extension of the disc information file (DISCINFO.XML). FIG. 3C is a diagram (3/3) for explaining backward compatibility in the extension of the disc information file (DISCINFO.XML). It is a figure which shows the process outline | summary at the time of injecting an optical disk. It is a flowchart which shows the process example of FM mounting. It is a figure which shows the example of recording of the several data stream to an optical disk. It is a figure which shows the example of a description of the disc information file (DISCINFO.XML) containing the last time code information.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 110 ... Optical disk apparatus, 111 ... System control part, 111a ... CPU, 111b ... ROM, 111c ... RAM, 112 ... Operation input part, 113 ... Control information input part, 114 ... Control information output unit, 115 ... Input unit, 115a ... Material data input unit, 115b ... Metadata input unit, 116 ... Recording signal processing unit, 117 ... Information processing unit 117a, information multiplexing unit, 117b, information decomposing unit, 118, network interface, 119, metadata processing unit, 120, drive control unit, 121, pickup unit, 122 ... Spindle drive unit, 123 ... reproduction signal processing unit, 124 ... output unit, 124a ... material data output unit, 124b ... metadata output unit, 130 .. Optical disc 161... Control unit 171. Clip processing unit 172 Reference edit search unit 173 Edit list update unit 174 Index file update unit 175. Disc information file update unit, 176 ... Mismatch processing unit, 181 ... Input control unit, 182 ... Communication control unit, 183 ... Write control unit, 184 ... Read control unit, 185 ... Edit update processing control unit, 186 ... output control unit

Claims (5)

An input unit for inputting material data constituting a data stream of predetermined content;
The material data input to the input unit is recorded in the data area of the recording medium, the material information added to the material data is recorded in the material information area of the recording medium, and the management information of the recording medium is recorded in the recording medium A recording section for recording in the management information area of
The recording apparatus in which the recording unit records the management information in the management information area includes final time code information of the last material data constituting the data stream of the predetermined content. The recording unit, when recording new material data by continuing the time code to the last time code of the last material data constituting the data stream of the predetermined content,
When the last time code information of the last material data is included in the management information recorded in the management information area, the time code is regenerated by the last time code information,
When the management information recorded in the management information area does not include the last time code information of the last material data, the material information added to the last material data recorded in the material information area The recording apparatus according to claim 1, wherein the time code is regenerated based on the last time code information included in the recording device. The recording unit, when a plurality of the data streams are recorded in the data area of the recording medium,
The recording apparatus according to claim 1, wherein the management information recorded in the management information area of the recording medium includes final time code information of the last material data constituting each data stream. The material data constituting the input data stream of the predetermined content is recorded in the data area of the recording medium, the material information added to the material data is recorded in the material information area of the recording medium, and the recording medium is managed A recording method for recording information in a management information area of the recording medium,
The recording method, wherein the management information recorded in the management information area includes the last time code information of the last material data constituting the data stream of the predetermined content. A data area for recording material data constituting a data stream of predetermined content, a material information area for recording material information added to the material data, and a management information area for recording own management information;
The recording medium, wherein the management information recorded in the management information area includes final time code information of last material data constituting the data stream of the predetermined content.