JP3600308B2 - Recording method and recording apparatus for recording data together with management information, and reproduction method and reproduction apparatus for reproducing data according to management information - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a recording method and a recording apparatus for recording data together with management information, a recording medium on which the management information is recorded together with the data, and a reproducing apparatus for reproducing data according to the management information. The present invention relates to a recording method and a recording device for recording on a recording medium such as a recording medium, a recording medium on which management information is recorded together with large-capacity data, and a reproducing device for reproducing data according to the management information.
[0002]
[Prior art]
2. Description of the Related Art In recent years, a moving image-compatible optical disk reproducing apparatus that reproduces digital data such as video and audio from an optical disk on which compressed digital data is recorded and reproduces the digital data on a monitor or a speaker has been developed. In the future, with the development of such an optical disc reproducing apparatus, it is expected that various kinds of reproducing software such as movies and karaoke will be provided from various manufacturers. Of these recording data, in particular, video data is expected to have an enormous data size. However, according to the current volume management method conforming to ISO9660, 4 Gbytes (accurately 4294967295 bytes) ) Cannot be handled as one data stream, so that it is necessary to divide the data into two or more data streams, and it is fully expected that inconvenience will occur when video and audio are continuously reproduced.
[0003]
[Problems to be solved by the invention]
As described above, in the conventional volume management method, a data stream having a data size exceeding 4 Gbytes has to be divided into two or more data streams. It is considered indispensable that the file can be handled as one file in control and file management. However, in the conventional volume management method based on ISO9660, there is a problem that the divided data stream cannot be managed because the standard is not determined in anticipation that the data size exceeds 4 Gbytes. There is a demand for the development of a data recording method, a data recording device, a data recording medium, and a data reproducing device capable of managing a data stream without dividing the data stream even when the data size exceeds 4 Gbytes.
[0004]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to record data with management information without dividing the data even if the data is large-capacity data exceeding a predetermined capacity. It is to provide a recording method which can be performed.
[0005]
Another object of the present invention is to provide a recording apparatus capable of recording data together with management information without dividing the data even if the data is large-capacity data exceeding a predetermined capacity.
[0006]
A further object of the present invention is to provide a recording medium capable of recording data according to management information and reproducing the data even if the data is large-capacity data exceeding a predetermined capacity.
[0007]
Still another object of the present invention is to provide a reproducing method and a reproducing apparatus capable of reproducing even large-capacity data exceeding a predetermined capacity in accordance with management information.
[0008]
[Means for Solving the Problems]
According to the invention,
A reproduction data generating step of generating digital reproduction data;
A data editing step of editing the generated reproduction data into file data according to a predetermined format,
A step of generating management information relating to the recording position of the file data and its size, wherein when the size of the file is within a predetermined value, first file size description information describing the size and the file size Is created, and if the size of the file exceeds a predetermined value, first file size description information in which the size of the predetermined value is described and A management information generating step of creating, as management information, second file size description information in which a file size corresponding to a difference exceeding a predetermined value is described;
Recording management information and file data in different areas of the recording medium;
A recording method for recording data together with management information characterized by comprising:
[0009]
According to the invention,
Reproduction data generation means for generating digital reproduction data;
Data editing means for editing the generated reproduction data into file data according to a predetermined format,
Means for generating management information relating to the recording position of the file data and its size, wherein when the file size is within a predetermined value, first file size description information describing the size and file size Is created, and if the size of the file exceeds a predetermined value, first file size description information in which the size of the predetermined value is described and Management information generating means for generating, as management information, second file size description information in which a file size corresponding to a difference exceeding a predetermined value is described;
Recording means for recording management information and file data in different areas of the recording medium;
A recording apparatus for recording data together with management information, characterized by comprising:
[0010]
Further, according to the present invention,
A first recording area for storing reproduction data in a file format and a second recording area for storing management information relating to the file, a first file size description field in which the size of the file is described, and a second description When the size of the file is within a predetermined value, the size of the file is described in the first description field, and the fact that the file size is zero is described in the second description field. If the size of the file exceeds a predetermined value, the first description field describes the predetermined size, and the second description field describes a file size corresponding to the difference exceeding the predetermined value. A recording medium having a second recording area,
Means for reading management information from the second recording area and reading a file based on the management information; reproducing means for continuously reproducing data from the read file;
A reproducing apparatus for reproducing data according to management information characterized by comprising:
[0012]
[Action]
ADVANTAGE OF THE INVENTION According to this invention, even if it is digital data of enormous size which consists of a video, an audio | voice, etc., it can manage and control collectively without losing the relevance between data, and can continuously reproduce without restriction by data size. It is possible to provide output.
[0013]
【Example】
Hereinafter, embodiments of a recording method for recording data according to management information, a recording device for recording data according to management information, a recording medium on which management information is recorded together with data, and a reproducing apparatus for reproducing data according to management information according to the present invention will be described. Will be described in detail with reference to the drawings.
[0014]
FIG. 1 is a block diagram of an optical disc reproducing apparatus for reproducing data from an optical disc according to an embodiment of the present invention, and FIG. 2 is a block diagram of a disc drive unit for driving the optical disc shown in FIG. FIG. 3 shows the structure of an optical disk as the recording medium shown in FIGS.
[0015]
In the optical disk reproducing apparatus shown in FIG. 1, recording data, that is, video data, sub-video data, and audio data are reproduced from the optical disk 10 by the user operating the key operation section and the display section 4, and the audio signal is reproduced in the apparatus. The video signal is converted to a video signal and reproduced as video and audio by the monitor unit 6 and the speaker unit 8 outside the device. That is, in the optical disk reproducing apparatus, a target address and a read command are sent from the system CPU unit 50 to the disk drive unit 30, and the disk drive unit 30 reads the target data from the optical disk in accordance with the sent command, and The read data pack is sent to the processor unit 50. The system processor 50 temporarily stores the read data pack in the data RAM unit 56, and thereafter, in accordance with the type of data, video data to the video decoder unit 58, audio data to the audio decoder unit 60, and sub-video data Are transferred to the sub-picture decoder unit 62, respectively. Thereby, the data processing is executed, and the moving image with the audio subtitle is reproduced and output on the monitor unit 6 and the speaker unit 8.
[0016]
As is already known, the optical disc 10 has various structures. As shown in FIG. 3, for example, a pair of structures 18 in which a recording layer, that is, a light reflection layer 16 is formed on a transparent substrate 14 are prepared. A high recording density type in which the pair of structures 18 are adhered via an adhesive layer 20 so that the recording layer 16 is sealed therein has emerged. In the optical disc 10 having such a structure, a center hole 22 into which the spindle of the spindle motor 12 is inserted is provided at the center thereof, and a clamping area for holding the optical disc 10 at the time of rotation is provided around the center hole 22. 24 are provided. On an optical disk such as U, various data such as MPEG-compressed moving images, audio and sub-pictures are recorded in a data format that will be described in detail after corresponding to the MPEG2 system layer. Here, the sub-pictures are recorded on the optical disc 10 by performing run-length compression on data of characters and simple animations.
[0017]
An area from the clamping area 24 to the outer peripheral edge of the optical disk 10 is defined as an information recording area 25 where information can be recorded on the optical disk 10. The optical disc shown in FIG. 3 has information recording areas 25 on both sides. Each information recording area 25 has an outer peripheral area in a lead-out area 26 where information is not normally recorded, and an inner peripheral area in contact with the clamping area 24 also has a lead-in area 27 in which information is not normally recorded. The data recording area 28 is defined between the lead-out area 26 and the lead-in area 27. In the recording layer 16 of the information recording area 25, usually, tracks are continuously formed in a spiral shape as areas in which data is recorded, and the continuous tracks are divided into a plurality of sectors. Is recorded. The data recording area 28 of the information recording area 25 is an actual data recording area. As described later, management data, main image data, sub-image data, and audio data are similarly recorded as physical state changes such as pits. Have been. In the read-only optical disk 10, a pit row is formed in advance on the transparent substrate 14 by a stamper, and a reflective layer is formed by vapor deposition on the surface of the transparent substrate 14 where the pit row is formed, and the reflective layer is formed as the recording layer 14. Will be done. In this read-only optical disk 10, no groove is usually provided as a track, and a pit row is defined as a track.
[0018]
In such an optical disk reproducing apparatus that reproduces data from the optical disk 10, the optical disk 10 is searched for by a light beam in the disk drive unit 30 that drives the optical disk. That is, as shown in FIG. 2, the optical disk 10 is mounted on a spindle motor 12 driven by a motor drive circuit 11 and rotated by the spindle motor 12. An optical head for condensing a light beam, that is, a laser beam on the optical disk 10, that is, an optical pickup 32 is provided below the optical disk 10. The optical head 32 is mounted on a guide mechanism (not shown) so as to be movable in the radial direction of the optical disc 10 in order to search the information recording area 25, particularly, the data recording area 28, and receives a signal from the drive circuit 37. The optical disk 10 is moved in the radial direction by a feed motor 33 driven by a drive signal. An objective lens 34 is movably held on the optical disk 10 along its optical axis, is moved in the optical axis direction in response to a drive signal from a focus drive circuit 36, and is always in the focus state. The lens 34 is maintained, and a minute beam spot is formed on the recording layer 16. The objective lens 34 is held so as to be finely movable in the radial direction of the optical disk 10, is finely moved in response to a drive signal from a track drive circuit 38, is always maintained in a tracking state, and is kept in a tracking state. The upper track is tracked with a light beam.
[0019]
The optical head 32 detects the light beam reflected from the optical disk 10, and the detected signal is supplied from the optical head 32 to the servo processing circuit 44 via the head amplifier 40. The servo processing circuit 44 generates a focus signal, a tracking signal, and a motor control signal from the detection signal, and supplies these signals to the drive circuits 36, 38, and 11, respectively. Therefore, the objective lens 34 is maintained in the focus state and the tracking state, the spindle motor 12 is rotated at a predetermined rotation speed, and the track on the recording layer 16 is a light beam by the light beam, for example, the linear velocity is constant. Tracked at. When a control signal as an access signal is supplied from the system CPU unit 50 to the servo processing circuit 44, a movement signal is supplied from the servo processing circuit 44 to the drive circuit 37, and the optical head 32 moves along the radial direction of the optical disk 10. Then, a predetermined sector of the recording layer 16 is accessed, and the reproduced data is amplified by the head amplifier 40 and output from the disk drive unit 30. The output reproduction data is stored in a data RAM unit 56 via a system CPU unit 50 and a system processor unit 54 controlled by a program recorded in a system ROM and RAM unit 52. The stored reproduction data is processed by the system processor unit 54 and classified into video data, audio data, and sub-picture data. The video data, audio data, and sub-picture data are respectively processed by the video decoder unit 58 and the audio decoder unit 60. Then, it is output to the sub-picture decoder 62 and decoded. The decoded video data, audio data, and sub-picture data are converted to analog video signals, audio signals, and sub-picture signals by a D / A and reproduction processing circuit 64, and are also subjected to mixing processing to produce a video signal and sub-picture data. The signal is supplied to the monitor 6, and the audio signal is supplied to the speaker 8. As a result, an image is displayed on the monitor unit 6 and sound is reproduced from the speaker unit 8. The detailed operation of the optical disk device shown in FIG. 1 will be described later in more detail together with the logical format of the optical disk 10 described below.
[0020]
The data recording area 28 from the lead-in area 27 to the lead-out area 26 of the optical disc 10 shown in FIG. 1 has a volume structure as shown in FIG. 4 conforming to ISO9660 as a logical format. This volume structure includes a volume management information area 70 and a file area 80 having a hierarchical structure. The volume management information area 70 corresponds to logical block numbers 0 to 23 defined based on ISO9660, and is assigned a system area 72 and a volume management area 74. Although the contents of the system area 72 are not normally defined as empty areas, for example, the system area 72 is provided for an editor who edits data to be recorded on the optical disk 10 and realizes driving of the optical disk apparatus according to the editor's intention. A system program for performing the operation is stored as needed. The volume management area 74 has a volume for managing a file 78 such as a disk information file 76 (hereinafter simply referred to as a disk information file 76) in a file area 80, a movie file or a music file, as described in detail below. Management information, that is, recording positions, recording capacities, file names, and the like of all files are stored. In the file area 80, files 76 and 78 from file number 0 to file number 99 specified by logical block numbers 24 and subsequent to the logical block number 24 are arranged, and the file 76 with the file number 0 is allocated as the desk information file 76. , Files 78 from file number 1 to file number 99 are allocated as movie files, that is, video files or music files.
[0021]
As shown in FIG. 5, in a volume management information area 74 of the volume management area 74, an area 71 in which a basic volume descriptor (PVD) corresponding to the logical block number 16 is described, and a volume description corresponding to the logical block number 17 An area 73 in which a child set terminator (VDT) is described, an area 75 in which a bus table record corresponding to the logical block number 18 and the logical block number 19 are described, and a directory record corresponding to the logical block number 23 from the logical block number 20 The area 77 in which is described is arranged. The basic volume descriptor describes the volume space of the optical disk 10, and describes information specifying the attributes of the volume, the position of the root directory, the position of the path table group, and the number of volumes in the volume set. Tables and directories are accessed. In the volume descriptor set terminator (VDT), a descriptor at which the set of recorded volume descriptors ends is described. In the bus table record (PT), information on the location of each directory and its hierarchical structure is described. According to this description, files located deep in the directory hierarchy are searched for efficient handling of files. Can be. The directory record describes information about the position and size of each file. In this directory record, a directory is also treated as a file, and a directory of a file such as a root directory, a directory of a disc information file corresponding to file number 0, a directory of a movie file and a music file corresponding to files after file number 1 and so on. Record, that is, information is described.
[0022]
FIG. 6 shows the contents of this directory record. The contents of the directory record are set for each file in the directory, and are described continuously by the number of files. In FIG. 6, the names and contents of the columns for the byte position (BP) in the directory record are described.
[0023]
The directory record length field specifies the number of bytes of the directory record, and the extended attribute record length field specifies the length of the extended attribute record when it is recorded. In the column, the start position of the file is described by a logical block number. The data length of the file is described in the data length column. If the data length exceeds a size (4 Gbytes) that cannot be described in byte positions (BP) 11 to 18 as will be described in detail later, the directory record specified in ISO9660 The data length is also described by using the system column in the description. In the recording date and time fields, the date and time at which information in the file corresponding to the extent described by the directory record is specified. Information such as whether a file corresponds to a directory or a file is described in the file flag column. In the columns of the size of the file unit and the size of the interleave gap, the type of the recording mode related to the recording in the interleave mode and the non-interleave mode, the size of the file unit in the interleave mode and the size of the interleave gap are shown. Is described, and the order number of the volume in which the file described by the directory record is recorded in the volume set is described in the volume order number column. In the file identifier length field, the number of bytes of the file identifier of the directory record is specified. In the file identifier field, an identifier for the file or directory is specified. This identifier is the value of the directory bit in the file flag field. Is interpreted according to In this embodiment, an identifier indicating that the file is a file on an optical disk capable of high-density recording is described as a file identifier. Further, the embedded column is provided for the directory only when the length of the file identifier column is an even number. These fields and contents are provided in common for a directory record of a file such as a root directory record, a directory record of a disc information file, and a directory of a movie file and a music file.
[0024]
A directory record of a disc information file and a directory record of a file such as a directory of a movie file and a music file further include an extended data length column and an extended file identifier corresponding to a system column in the description of a directory record defined in ISO9660. Column is provided.
[0025]
Normally, the file size is expressed in the order of both bytes using the data length column (8 bytes from the 11th byte to the 18th byte) of this directory record. The order of both bytes is a format in which a numerical value of (st uv wx yz) is expressed as (yz wx uv st st uv wx yz) in hexadecimal notation. That is, the maximum value FFFFFFFFh bytes (4, 294, 967, 395 bytes) represented by 4 bytes can be expressed here as the file size.
[0026]
In the embodiment of the recording method according to the present invention, the length of the directory record itself is defined as 40h (64 bytes) and the length of the file identifier is defined as 0Eh (14 bytes). The 16 bytes up to this point correspond to the part called for the system in the description of the directory record defined in ISO9660. The upper 8 bytes of this part are used as the extended data length description area, and are used when the file size exceeds the range that can be described in the data length description area. The description format in the extended data length description area is in both byte order as in the data length description area, and the difference between the file size and the size that can be described in the data length description area (file size-FFFFFFFFh) is described. If the file size is FFFFFFFFh bytes or less, all bytes 00h are described in the extended data length description area. In the case of a file that cannot be managed by only this one extended data length recording area (when the file size exceeds 8 Gbytes), the system area specified by ISO is extended, and a new extended data length description area and extended file identifier are added. Is added, the manageable file size can be increased to 12 GB, 16 GB,.... Here, the same identifier as the file identifier is assigned to the extended file identifier.
[0027]
As shown in FIG. 7, the desk information file 76 includes a file management information area 82 and a menu video data area 84. The file management information area 82 includes a selectable sequence recorded on the entire optical desk 10. That is, file management information for selecting a video or audio title is described. In the menu video data area 84, image data of a menu screen for displaying a selection menu such as a title is stored as a menu data cell 90 in cell units. That is, the menu video data in the menu video data area 84 is divided into units of a required size according to the purpose, as will be described in detail later. It is defined as i menu cells 90 to which numbers are continuously assigned. The menu cell 90 stores movie or audio titles, video data, sub-video data, or audio data related to each title program.
[0028]
As shown in FIG. 7, the file management information area 82 includes a disk configuration information area 86 for storing disk configuration information (DSINF: Disc Structure Information), and a menu configuration information area for storing menu configuration information (MSINF: Menu Structure Information). 87, a cell information table (MCIT: Menu Cell Information Table) 88 for storing cell information, and are arranged in this order.
[0029]
The disc configuration information area 86 mainly includes the number of movie files and music files recorded in the file area 80 of the disc 10, that is, the number of playback files 78 (described as a parameter DSINF in the range of 1 to 99). , The number of sequences (referred to as a series of video data including video, audio, sub-picture, etc.) existing in each file 78, that is, the number of titles (described as the parameter FSINF). Information is described.
[0030]
In the menu configuration information area 87, the number of menu cells 90 of the menu video data area 84 recorded in the disc information file 76 (described as a parameter NOMCEL) and a title existing in the disc are selected. Information such as a start cell number (described as a parameter TMSCEL) of a title menu cell 90 that constitutes a series of menu video data.
[0031]
In the menu cell information table 88, cell information necessary for reproducing each menu cell 90 is defined as a set of i cell information areas 89 in which cell information is described in order of cell numbers. In the cell information table 88, the position of the cell 90 in the file 76 (described as a parameter MCSLBN with a logical block number offset from the beginning of the file), size (described as a parameter MCNLB with the number of logical blocks), and the like. Is described. Here, the disc configuration information (DSINF) and the menu configuration information (MSINF) are continuously described in the file management information area 82, and the menu cell information table (MCIT) 88 is aligned with the boundary of the logical block.
[0032]
Music data or movie data of one or more titles is stored in a movie file and a music file 78 corresponding to file numbers 1 to 99. As shown in FIG. 8, the file 78 includes specification information on data included in the file 78, that is, a file management information area 101 in which management information (for example, address information and reproduction control information) is described. The file 78 has a file structure including a video data area 102 in which video data (video, audio, sub-video data, and the like are simply referred to as video data) is described. In the video data area 102, video data is divided into cell units similarly to the menu cell 90 of the desk information file 76, and the video data is arranged as j video data cells 105.
[0033]
As shown in FIG. 8, the file management information area 101 includes a file management table (FMT: File Management Table) 113, a sequence information table (SIT: Sequence Information Table) 114, a cell information table (CIT: Cell Information Table) 115, and the like. Be composed. The video data cells in the video data area 102 are numbered consecutively from # 1 in the recording order on the disk, and the cell number and information about the cell associated with the cell number are described in the cell information table 115. ing. That is, the cell information table 115 is defined as a set of areas 117 storing j pieces of cell information (CI) describing information necessary for reproducing video data cells in order of cell numbers. ) Describes information such as the position, size, and reproduction time of a cell in the file 78.
[0034]
The sequence information table 114 is defined as a set of areas 116 in which i pieces of sequence information (SI) describing the order of selecting and reproducing the cells 105 within the range specified for each sequence 106 are stored. In the sequence information (SI), the reproduction order and the reproduction control information on the reproduction of the video cells 105 recorded in the sequence 106 are described. The sequence 106 includes a concatenated sequence that is completed in one sequence and a connection type sequence that is branched and connected to the next sequence for each sequence. The connection type sequence includes a head sequence of video data corresponding to a multi-story. There is a connection-type head sequence that can branch from this sequence and be connected to the next sequence, i.e., a connection-type head sequence in which the story changes in a manner selected by the connection-type head sequence. Furthermore, there is a connection-type intermediate sequence connected to another sequence, and a connection-type termination sequence that is connected from another connection-type sequence and ends the sequence, that is, a connection-type termination sequence in which the story ends in this sequence. The sequence information numbers are defined as sequence numbers 1 to i, and the respective start position information is written in the file management information table 113.
[0035]
The file management table (FMT) 113 shows specification information on the video file 78. In the file management table 113, the file name and a file identifier for identifying whether or not the file can be reproduced by the optical disk reproducing apparatus loaded with the optical disk are described. In the file identifier, for example, an identifier for identifying a movie file is described. The file management table 113 also includes start addresses of the sequence information table 114 and the cell information table 115, the number of sequence information and cell information described in each table, and a relative distance from the head of the sequence information table 114. The start address of each sequence 116, the start address for starting the video data of the video data area 102, the data attribute as information for reproducing each data, and the like are described as shown in FIG.
[0036]
Next, the operation of reproducing movie data from the optical disc 10 having the logical format shown in FIGS. 4 to 8 will be described with reference to FIG. 1 again. In FIG. 1, solid arrows between blocks indicate data buses, and broken arrows indicate control buses.
[0037]
In the optical disk device shown in FIG. 1, when the power is turned on, the system CPU unit 50 reads an initial operation program from the system ROM and RAM 52 and operates the desk drive unit 30. Therefore, the target address and the read command are sent from the system CPU unit 50 to the optical disk drive unit 30, and the optical disk drive unit 30 starts reading the target data from the optical disk 10 in accordance with the sent instruction, and sends the read data to the system processor unit 54. The read data pack will be sent. That is, the disk drive unit 30 starts a read operation from the lead-in area 27, and reads volume management information from the volume management information area 74 of the volume management area 70 following the lead-in area 27. The system CPU unit 50 gives a read command to the disk drive unit 30 to read out volume management information from the volume management information area 74 recorded at a predetermined position of the disk 10 set in the disk drive unit 30, The contents of the information are read out and temporarily stored in the data RAM unit 56 via the system processor unit 54. The system CPU unit 50 extracts information such as the recording position and the recording capacity of each file and other information necessary for management from the data string of the volume management information stored in the data RAM unit 56, and a predetermined information of the system ROM & RAM unit 52. Transfer to location and save. In the step of reading out the volume management information, the optical disk 10 to be read out from the basic volume descriptor (PVD) is a high-density type optical disk, and the format of the recorded logical format and the volume size thereof are determined. The volume attributes, the position of the root directory, the position of the path table group, the number of volumes in the volume set, and the like are recognized. Based on this descriptor, a path table, a directory, and the like are accessed as described with reference to FIG. 9, and then a file is accessed.
[0038]
A case where a file having a size exceeding 4 Gbytes is read will be described with reference to FIG. In this embodiment, all the files recorded on the optical disk are on the root directory.
[0039]
First, a basic volume descriptor (PVD) in the volume management information of the disk is read into the data RAM unit 56 (step S1). The system CPU 50 reads the description indicating the position of the path table record in the basic volume descriptor, and identifies the position (step S2). From this identified position, the path table record is read into the data RAM unit 56 (step S3). The CPU 56 reads the description indicating the position of the directory record in the path table record, and identifies the position of the directory record (step S4). Thereafter, a key input for designating a file from the key operation unit and the display unit 4 is awaited (step S5). When a read file is designated by key input (step S6), reading of a directory record is started from the position identified in step S4, and the directory record is temporarily stored in the data RAM 56 (step S7). The file identifier in the directory record is compared with the file identifier specified by the key input in step S6 (step S8), and it is confirmed whether or not the result of the comparison matches (step S9). If the result of the comparison does not match, the next directory record is read (step S7). If the result of the comparison is a match, the head position information of the file described in the directory record (position information of the extent described in the third to tenth bytes) and the data length of the file are read. Is stored in the ROM & RAM unit 52 (step S10). Further, the extension data length in the same directory record is read and similarly stored in the system ROM & RAM unit 56 (step S11). File reading is started using the file position information, the file data length, and the extended data length stored in the system ROM & RAM unit 56 (step S12). FIG. 9 is a flow chart for reading a file having a size exceeding 4 Gbytes. The same applies to a case of reading a file having a size not exceeding 4 Gbytes. The difference is that it reads and handles no extended data. Therefore, the description is omitted.
[0040]
As described above, the system CPU unit 50 refers to the information of the recording position and the recording capacity of each file acquired from the system ROM & RAM unit 52 as follows to display a file, for example, a menu. Obtains the disk information file 76 corresponding to the file number 0. The system CPU unit 50 gives a read command to the disk drive unit 30 by referring to the information on the recording position and the recording capacity of each file previously acquired from the system ROM and RAM unit 52, and if the file number is 0, The file management information of a certain disk information file 76 is read and stored in the data RAM unit 56 via the system processor unit 54. The acquired information is similarly transferred to a predetermined location in the system ROM & RAM unit 52 and stored.
[0041]
The system CPU 50 reproduces a sequence (title) selection menu of the menu video data 84 by using the disc configuration information 86, the menu configuration information 87, and the cell information table 88 of the file management information of the disk information file 76. It is displayed on the screen as described later.
[0042]
The user designates the selection of the sequence (title) to be reproduced by using the key operation and the display unit 4 based on the selection number written on the displayed menu screen. As a result, the file number and sequence information to which the selected sequence belongs are specified.
[0043]
The operation from the acquisition of the designated video file 78 to the reproduction of the video data 102 will be described below. To obtain the sequence information for the designated sequence number, the file position of the video file 78 to which the sequence to be reproduced belongs is first determined using the recording position and the recording capacity of each video file 78 obtained from the volume management information 74. The management information 101 is read out as in the case of the disk information file 76, and stored in the data RAM unit 56.
[0044]
The system CPU unit 50 obtains sequence information corresponding to the designated sequence number from the sequence information table 114 of the file management information 101 stored in the data RAM unit 56, and obtains the data and the data for reproducing the sequence. The cell information 117 in the appropriate cell information table 115 is transferred to the system ROM & RAM unit 52 and stored.
[0045]
The cell information to be reproduced first is obtained based on the cell reproduction order information in the sequence information thus obtained, and the disc drive unit 30 is directed to the disk drive unit 30 based on the video data reproduction start address and size in the cell information. A read instruction from the address is given. The disk drive unit 30 drives the optical disk 10 according to the read command, reads data at a target address from the optical disk 10, and sends the data to the system processor unit 54. The system processor 54 temporarily stores the transmitted data in the data RAM 56 and determines the type of the data (video, audio, sub-picture, playback information, etc.) based on the header information added to the data. Then, the data is transferred to the decoder units 58, 60, 62 corresponding to the determined type.
[0046]
Each of the decoders 58, 60 and 62 decodes the data according to the respective data format and sends the data to the D / A & reproduction processing unit 64. The D / A & reproduction processing section 64 converts the decoded digital signal into an analog signal, performs a mixing process, and outputs the result to the monitor section 6 and the speaker section 8.
[0047]
In the process of determining the type of data, if the data is playback information indicating the playback position of video data, the playback information is not transferred to the decoder, and the playback data is stored in the data RAM unit 56. Is done. The reproduction information is referred to by the system CPU 50 as necessary, and is used for monitoring when reproducing the video data. When the reproduction of one cell is completed, the cell information to be reproduced next is obtained from the cell reproduction order information in the sequence information, and the reproduction is continued similarly.
[0048]
Next, referring to FIGS. 10 and 15, video data in a logical format shown in FIGS. 4 to 8 and a recording method for reproducing the video data on the optical disk 10 and a recording system to which the recording method is applied will be described. explain.
[0049]
FIG. 10 shows an encoder system that generates video files by encoding video data. In the system shown in FIG. 10, as sources of main video data, audio data, and sub-video data, for example, a video tape recorder (VTR) 201, an audio tape recorder (ATR) 202, and a sub-video source (Subpicture source) 203 Is adopted. These generate main video data, audio data, and sub-video data under the control of a system controller (Sys con) 205, which are respectively a video encoder (VEC) 206, an audio encoder (AENC) 207, and a sub-video encoder (SPENC). ) 208, and similarly A / D-converted by these encoders 206, 207, and 208 under the control of a system controller (Sys con) 205 and encoded by respective compression methods. Data and sub-video data (Comp Video, Comp Audio, Comp Sub-pict) are stored in the memories 210, 211, and 212. The main video data, audio data, and sub-video data (Com Video, Comp Audio, Comp Sub-pict) are output to a file formatter (FFMT) 214 by a system controller (Sys con) 205, and the system has already been described. And the information such as setting conditions and attributes of each data is stored in the memory 216 by the system controller (Sys con) 205 as a file.
[0050]
Hereinafter, a standard flow of an encoding process in the system controller (Sys con) 205 for creating a file from video data will be described.
[0051]
The main video data and audio data are encoded according to the flow shown in FIG. 11, and data of the encoded main video and audio data (Comp Video, Comp Audio) is created. That is, when the encoding process is started, parameters necessary for encoding the main video data and the audio data are set as shown in step 70 of FIG. Some of the set parameters are stored in the system controller (Sys con) 205 and used by the file formatter (FFMT) 214. As shown in step S71, the main video data is pre-encoded using the parameters, and the distribution of the optimal code amount is calculated. As shown in step S72, the main video is encoded based on the code amount distribution obtained by the pre-encoding. At this time, the encoding of the audio data is also executed at the same time. If necessary as shown in step S73, partial re-encoding of the main video data is executed, and the main video data of the re-encoded portion is replaced. By this series of steps, the main video data and the audio data are encoded. Further, as shown in steps S75 and S76, the sub-picture data is encoded to create encoded sub-picture data (Comp Sub-pict). That is, parameters necessary for encoding the sub-picture data are set in the same manner. Some of the parameters set as shown in step S75 are stored in the system controller (Sys con) 205 and used by the file formatter (FFMT) 214. Sub-picture data is encoded based on these parameters. By this processing, the sub-picture data is encoded.
[0052]
According to the flow shown in FIG. 12, the encoded main video data, audio data, and sub video data (Com Video, Comp Audio, Comp Sub-pict) are combined, and the video data file described with reference to FIG. Converted to structure. That is, as shown in step S76, the cell 105 as the minimum unit of the video data is set, and the cell information table (CIT) 117 is created. Next, as shown in step 77, the configuration of the cell 117 constituting the sequence 107, the main video, the sub video, the audio attribute, and the like are set (a part of these attribute information is information obtained at the time of each data encoding). File management information (FMI) including the cell information table (CIT) 117 is created. The encoded main video data, audio data, and sub-video data (Com Video, Comp Audio, Comp Sub-pict) are subdivided into fixed packs, and each GOP unit can be reproduced in the order of the time code of each data. Each data cell is arranged while the control pack (DSI) 92 is inserted, and is formatted into a structure of a disk information file 76 and a file 78 such as a movie file as shown in FIGS.
[0053]
In the flow shown in FIG. 12, the sequence information is obtained by using the database of the system controller (Sys con) 205 in the process of step 77, or re-inputting data as necessary. It is described in the sequence information table (SIT) 113.
[0054]
FIG. 13 shows a disk formatter system for recording files 76 and 78 formatted as described above on an optical disk. As shown in FIG. 13, in the disk formatter system, these file data are supplied to a volume formatter (VFMT) 226 from memories 220 and 222 in which a created information file 76 and a file 78 such as a movie file are stored. In the volume formatter (VFMT) 226, in addition to the files 76 and 78, volume information 74 of the disk is further added in the arrangement order shown in FIG. 4 to create logical data in a state to be recorded on the disk 10. At this time, when the volume of the file exceeds 4 G, the size of the file exceeding the extension data length of the directory record is described and an extension file identifier is added. If necessary, an extended data length and an extended file identifier can be further described, and a description relating to the size of a file exceeding 4 G can be described. Data for error correction is added to the logical data created by the volume formatter (VFMT) 226 by a disk formatter (DFMT) 228, and the logical data is converted again to physical data to be recorded on a disk. In the modulator 230, the physical data created by the disk formatter (DFMT) 228 is converted into the recording data to be actually recorded on the disk, and the modulated recording data is recorded by the recorder 232 on the disk 10. Recorded in.
[0055]
A standard flow for creating the above-described disc will be described with reference to FIGS. FIG. 14 shows a flow in which logical data to be recorded on the disk 10 is created. That is, as shown in step S80, parameter data such as the number of video data files, the order of arrangement, and the size of each video data file are set first. Next, volume information is created from the parameters set as shown in step 81 and the file management information of each video data file. Thereafter, as shown in step 82, data is arranged along the corresponding logical block number in the order of volume information including the extended data length and the file identifier, and the video data file, and logical data to be recorded on the disk 10 is created. .
[0056]
Thereafter, a flow for creating physical data to be recorded on the disc as shown in FIG. 15 is executed. That is, as shown in step S83, the logical data is divided into a fixed number of bytes, and error correction data is generated. Next, as shown in step S84, the logical data divided into a fixed number of bytes and the generated data for error correction are combined to create a physical sector. Thereafter, as shown in step S85, physical data is created by combining the physical sectors.
[0057]
As described above, the modulation processing based on a certain rule is performed on the physical data generated by the flow shown in FIG. 25, and the recording data is created. Thereafter, the recording data is recorded on the disk 10.
[0058]
【The invention's effect】
As described above, according to the file management method of the present invention, even a large-capacity file having a size exceeding 4 GB does not need to be divided into two or more files, and the reproduction control is performed as one data stream. As a result, it is possible to withstand special reproductions such as long-time continuous reproduction, fast-forward reproduction, and rewind reproduction. If the system area in the directory record is further expanded and the new extended data length description area is lowered, the manageable file size can be expanded to 12 GB, 16 GB,.
[Brief description of the drawings]
FIG. 1 is a block diagram schematically showing an optical disk device.
FIG. 2 is a block diagram showing details of the disk drive device shown in FIG.
FIG. 3 is a perspective view schematically showing a structure of the optical disc shown in FIG.
FIG. 4 is an explanatory diagram showing a structure of a logical format of the optical disc shown in FIG. 3;
FIG. 5 is an explanatory diagram showing a structure of a volume management information area shown in FIG. 4;
FIG. 6 is a diagram showing the contents of a directory record shown in FIG. 5;
FIG. 7 is an explanatory diagram showing the structure of a desk information file shown in FIG.
FIG. 8 is an explanatory diagram showing the structure of files such as a movie file and a music file shown in FIG. 4;
FIG. 9 is a flowchart illustrating an operation of reading a directory record shown in FIG. 5 and reading a file.
FIG. 10 is a block diagram showing an encoder system that generates video files by encoding video data.
11 is a flowchart showing an encoding process shown in FIG.
12 is a flowchart for creating a file of video data by combining main video data, audio data, and sub-video data encoded according to the flow shown in FIG. 11;
FIG. 13 is a block diagram showing a disk formatter system for recording a formatted video file on an optical disk.
14 is a flowchart for creating logical data to be recorded on a disk in the disk formatter shown in FIG.
FIG. 15 is a flowchart for creating physical data to be recorded on a disk from logical data.
[Explanation of symbols]
6 Monitor part
8 Speaker part
10… optical disk
14… Transparent base
16 Light reflection layer
28… data recording area
30… disk drive
32… Optical pickup
34… Objective lens
36… Focus drive circuit
37… drive circuit
44… Servo processing circuit
50: System CPU
54… System processor
56… Data RAM section
58… Video decoder section
60… audio decoding unit
62… sub-picture decoder
64 D / A and reproduction processing circuit
70: Volume management information area
72… System area
74… Volume management area
76… Disk information file
78… File
71… Basic volume descriptor area
73… Volume descriptor set terminator area
75… Bath table record area
77… directory record area 77
80… File area
82… File management information area
84… Menu video data area
86: Disk configuration information area
87… Menu configuration information area
88… cell information table
90… Menu data cell
101: File management information area
102… Video data area
113… File management table
114 ... sequence information table
115 ... cell information table
201… Video tape recorder
202… Audio tape recorder
203… Sub-picture player
205… System controller
206… Video encoder
207… Audio encoder
208… Sub-picture encoder
205… System controller
220, 222 ... memory
226… Volume formatter
228… Disk formatter
230… modulator
232… Recorder

Claims (16)

A reproduction data generating step of generating digital reproduction data;
A data editing step of editing the generated reproduction data into file data according to a predetermined format,
A step of generating management information relating to the recording position of the file data and its size, wherein when the size of the file is within a predetermined value, first file size description information describing the size and the file size Is created, and if the size of the file exceeds a predetermined value, first file size description information in which the size of the predetermined value is described and A management information generating step of creating, as management information, second file size description information in which a file size corresponding to a difference exceeding a predetermined value is described;
Recording management information and file data in different areas of the recording medium;
A recording method for recording data together with management information, comprising: The management information includes a first file identifier information in which a file identifier for identifying a file is described in relation to the first file size description information, and a file identifier for identifying a file in relation to the second file size description information 2. The recording method according to claim 1, further comprising second file identifier information in which is described. The recording method according to claim 1, wherein the first and second file size description column information uses 8 bytes to describe the file size in both byte order. 2. The recording method according to claim 1, wherein 4, 294, 967, and 395 bytes corresponding to the maximum file size can be described as the predetermined value in the first and second file size description information. . Reproduction data generation means for generating digital reproduction data;
Data editing means for editing the generated reproduction data into file data according to a predetermined format,
Means for generating management information relating to the recording position of the file data and its size, wherein when the file size is within a predetermined value, first file size description information describing the size and file size Is created, and if the size of the file exceeds a predetermined value, first file size description information in which the size of the predetermined value is described and Management information generating means for generating, as management information, second file size description information in which a file size corresponding to a difference exceeding a predetermined value is described;
Recording means for recording management information and file data in different areas of the recording medium;
A recording device for recording data together with management information, comprising: The management information generating means identifies a file in relation to first file identifier information and a second file size description information in which a file identifier for identifying a file is described in relation to the first file size description information. 6. The recording apparatus according to claim 5 , wherein second file identifier information in which a file identifier is described is generated. 6. The recording apparatus according to claim 5 , wherein the first and second file size description column information uses 8 bytes to describe a file size in both byte order. 6. The recording apparatus according to claim 5 , wherein the first and second file size description information can describe 4, 294, 967, 295 bytes corresponding to a maximum file size as a predetermined value. . A first recording area for storing reproduction data in a file format and a second recording area for storing management information relating to the file, a first file size description field in which the size of the file is described, and a second description When the size of the file is within a predetermined value, the size of the file is described in the first description field, and the fact that the file size is zero is described in the second description field. If the size of the file exceeds a predetermined value, the first description field describes the predetermined size, and the second description field describes a file size corresponding to the difference exceeding the predetermined value. A recording medium having a second recording area,
Means for reading management information from the second recording area and reading a file based on the management information; reproducing means for continuously reproducing data from the read file;
A reproducing apparatus for reproducing data according to management information, comprising: The second recording area of the recording medium is associated with a first file identifier field and a second file size description field in which a file identifier for identifying a file is described in relation to a first file size description field. 10. The reproducing apparatus according to claim 9 , further comprising a second file identifier field in which a file identifier for identifying a file is described. 10. The reproducing apparatus according to claim 9 , wherein the first and second file size description fields of the recording medium describe a file size in both byte order using 8 bytes. 10. The reproducing apparatus according to claim 9 , wherein 4, 294, 967, 295 bytes corresponding to the maximum file size can be described as the predetermined value in the first and second file size description fields. . A first recording area for storing reproduction data in a file format and a second recording area for storing management information relating to the file, a first file size description field in which the size of the file is described, and a second description When the size of the file is within a predetermined value, the size of the file is described in the first description field, and the fact that the file size is zero is described in the second description field. When the size of the file exceeds a predetermined value, the first description field describes the predetermined size, and the second description field describes a file size corresponding to the difference exceeding the predetermined value. Reproducing reproduction data from a recording medium having a second recording area,
Reading management information from the second recording area and reading a file based on the management information;
Continuously reproducing data from the read file;
A reproducing method for reproducing data according to management information, characterized by comprising: The second recording area of the recording medium is associated with a first file identifier field and a second file size description field in which a file identifier for identifying a file is described in relation to a first file size description field. 14. The reproducing method according to claim 13 , further comprising a second file identifier field in which a file identifier for identifying a file is described. 14. The reproducing method according to claim 13 , wherein the first and second file size description fields of the recording medium describe a file size in both byte order using 8 bytes. 14. The reproducing method according to claim 13 , wherein 4, 294, 967, 295 bytes corresponding to the maximum file size can be described as the predetermined value in the first and second file size description columns. .

Images