JP2001167559A - Optical disk, recorder, reproducer and computer readable recording medium having record or reproduction program recorded thereon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk on which particular information is recorded so as to keep relation with a VOB despite the uncertain change of time information on the VOB. SOLUTION: A VOB corresponding to a broadcast program is recorded in a DVD-RAM, and the VOB-REC-TIME showing the recording date of the VOB and the VOB-Start-PTM showing the reproduction start timing of the VOB are recorded in an RTRW management file. The VOB-REC-TIME and VOB-Start-PTM are equal to the information to which an offset based on the deletion length is added when the VOB is partly deleted. Meanwhile, a file with the information on the broadcast program recorded thereon is also recorded in the DVD-RAM and a file name including the identification information, i.e., the difference between the VOB-REC-TIME and VOB-Start-PTM is given to the file.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video object including moving image data, an optical disk on which management information is recorded, a recording device for the optical disk, and a reproducing device for the optical disk.

[0002]

2. Description of the Related Art In recent years, DVD-RAM and DVD-
Various consumer devices using a phase change type optical disk such as RW as a recording medium are being developed, and a grand change is about to be started in the audiovisual field mainly using a magnetic tape. VTRs using DVD-RAM and DVD-RW are typical of consumer devices that use phase-change optical disks as recording media.
There are alternative recorders. In general, VTR recorders are widely used in households to record TV broadcast programs. It is expected that enormous demand will occur regardless of the demand. In order to keep such enormous demand in the hands of manufacturers, manufacturers have been struggling to develop alternatives to VTR recorders with better performance.

In developing a DVD-RAM recorder as an alternative to a VTR recorder, a study will be made as to what data format is used to record a television program on a phase-change optical disc. A typical standard for recording video and audio on phase-change optical discs is the DVD Application Formatf published by the DVD Forum in January 1999.
or DVD Rewritable Discs Part1 VIDEO RECODING Standard v
er 0.9 (hereinafter referred to as VIDEO RECORDING standard)
-Specifies the data format for recording data in the RAM, the specifications of the reproducing device for reproducing the data, and the like.

According to this standard, in a DVD-RAM, video and audio in a television program are recorded as VOBs. VOB (Vi
deo OBject) is a video stream in which video is encoded according to the MPEG standard, and audio is linear-PCM, Dolby-AC
3, a stream obtained by interleaving and multiplexing an audio stream encoded based on MPEG1-Audio and MPEG2-Audio. In this way, video and audio are recorded on DVD-RAM in units of VOB, so it is not the case that the relationship may be "TV program equal VOB".
The reason is as follows. That is, the recorded VOB
If the DVD contains a commercial, the DVD-RAM recorder can delete the commercial. However, if the commercial is partially deleted as described above, seamless reproduction is not maintained before and after the partial deletion, and the DVD-RAM recorder manages the two parts before and after the deleted part as two separate VOBs. If the VOB before and after the part that was partially deleted is a separate VOB, for example,
If one commercial is inserted, deleting the commercial will result in the VOB being split into six VOBs, and what was originally one TV program will be split into six TV programs become.

When one television program is originally divided into a plurality of television programs, the management of the television programs becomes complicated, and the user is unnecessarily confused. For this reason, when developing a DVD-RAM recorder as an alternative to a VTR recorder,
It is said that it is better to set a relationship called "TV program equal PG" instead of setting a relationship called "VOB".

A program (ProGrram: hereinafter abbreviated as PG) is a unit including one or more VOBs and a cell corresponding to the VOB (a cell is a VOB designated using time information). Is a unit for designating the whole section or the partial section of.). Hereinafter, how a PG changes in the course of editing when a broadcast program is designated as a PG will be described.

In this description, it is assumed how a partial section of a VOB is specified when a VOB is partially deleted. FIG. 33 is a diagram assuming how a partial section of a VOB is specified when a VOB is partially deleted. When two television programs, broadcast programs A and B, are recorded, the video and audio in the television programs are changed as shown in FIG.
As shown in the fourth row of (a), as VOB # 1 and VOB # 2, DV
Recorded in D-RAM. These VOBs are managed as cells as shown in the third row, and are recorded as PGs as shown in the second row. These two PGs are further included in units called original program chain information as shown in the first row.

[0008] Thus, the VOB for the television programs A and B,
After the cell and PG are recorded, it is assumed that commercial parts t1, t2, t3, and t4 located in the middle of VOB # 1 and VOB # 2 have been deleted as shown in FIG. If partial deletion is performed in this manner, as described above, the first VOB # 1 (old) is
As shown in (a), VOB # 1 before and after the part to be partially deleted
(New), VOB # 2 (New), and VOB # 3 (New). The second VOB # 2 (old) is VOB # 4 (new), VOB # 5 (new), VOB #
6 (new) is divided into three VOBs. As described above, along with the division of the VOB, cell # 1 (old) is also divided into three cells, cell # 1 (new), cell # 2 (new), and cell # 3 (new), and cell # 2 (old). ) Is also divided into three cells, cell # 4 (new), cell # 5 (new), and cell # 6 (new), but the inclusion relationship that these three divided cells are included in the PG is no change. That is, before the division, the television program A is managed as PG # 1 including one cell and one VOB, and after the division, the television program B is managed as PG # 2 including three cells and three VOBs. It is.

FIG. 34 (b) shows a state in which, as shown in FIG. 33 (b), after dividing VOBs and cells, only the leading part of VOB # 1 included in PG # 1 is partially deleted. FIG.
Also in this case, Cell # 1, Cell # 2, Cell # 3, VOB # 1, VOB are added to PG # 1.
It can be seen that the inclusion relation that # 2 and VOB # 3 are included has not changed. As described above, PG is used as a management unit for broadcast programs.
By using, even if the middle of the VOB is deleted or the beginning is deleted, the number of broadcast programs does not increase or decrease before and after deletion, making it easier to manage recorded TV programs It has the effect of becoming.

The unit of PG corresponding to a broadcast program is VIDEO
Because it is provided in the RECORDING standard, information related to the broadcast program (hereinafter referred to as related information), such as the story of each broadcast program, the profile of the cast, and comments on the broadcast program, is recorded on the DVD-RAM. In addition, those related information files can be associated with each PG.

FIG. 35 is a diagram assuming a case where a file containing related information on broadcast programs A and B is recorded on a DVD-RAM. In this figure, the related information on broadcast program A is recorded in a file with the file name IFOPG1.dat and recorded on the DVD-RAM, and the related information on broadcast program B is stored in the file with the file name IFOPG2.dat. It is recorded and recorded on DVD-RAM. As described above, even if the VOB is edited, the inclusion relationship between the PG, VOB, and Cell does not change, so the link relationship between the PG and the file containing the related information of the broadcast program fluctuates before and after the editing. do not do. For example, when the reproduction for a certain PG is specified by the operator, the related information corresponding to the PG is read and displayed, or if a file containing the certain related information is specified, the The corresponding PG can be reproduced.

In the VIDEO RECORDING standard, PG includes:
Thumbnail (Thumbnail is a reduced image of an image included in PG, and is used for the purpose of indicating what content is reproduced when a video object constituting a program is reproduced.) In addition, a primary text area and an item text area are reserved to record text information related to the PG (however, the size that can be described is limited, and the related information is limited). The amount of description of the text information is limited as compared with the case of recording in a file.) If PG is managed as a TV program, thumbnails of this TV program can be recorded on DVD-RAM,
Text information about a TV program can be recorded as a primary text area and an item text area. In this way, if text information about a TV program is recorded on a DVD-RAM, When a broadcast program is recorded, it is easy to specify which PG is which program.

[0013]

By the way, manufacturers tend to define their own information in order to differentiate themselves from DVD-RAM recorders developed by other companies. The unique information is related to the information specified in the VIDEO RECORDING standard such as VOB and PGC,
This is information to supplement functional aspects that cannot be provided by the information specified in the ING standard. If the information recorded on the DVD-RAM is edited by the in-house recorder, the original information is VIDEO
The original function of supplementing functions that cannot be provided by the information specified in the RECORDING standard can be demonstrated,
If edited by another company's recorder,
There is a problem that inconsistency with the information specified in the VIDEO RECORDING standard occurs, and the original function cannot be exhibited. Here, the in-house recorder is a DVD-RAM recorder developed by a certain manufacturer and conforms to the VIDEO RECORDING standard.
A DVD-RAM recorder that has an obligation to update both information conforming to the DING standard and proprietary information. And VID
Although it is obliged to update information according to the EO RECORDING standard,
It is a DVD-RAM recorder that has no obligation to update its own information.

[0014] When information specified in the VIDEO RECORDING standard is edited by another company's recorder, the other company's recorder has no obligation to update its own information.
Unique information that is related to the information specified in the CORDING standard is left as it is before editing. If the DVD-RAM is loaded into the recorder after editing by another company's recorder, the original information is in the state before editing, so the information defined by the VIDEO RECORDING standard and the original information An inconsistency appears, and the unique information can no longer be used.

[0015] Three typical cases in which inconsistency between the information specified by the VIDEO RECORDING standard and the unique information appears will be described below. (First Case) As described in the related art, if information related to a program is stored in a PG-related file, the information for each program can be suitably managed, as described in the related art. However, the PG-related information file conforms to the VIDEO RECORDING standard. DVD-RAM recorder is not the information specified in
When a G-related file is used, a process of uniquely specifying a PG-related file from a VOB (Cell) must be performed. Here, in the VIDEO RECORDING standard, there is information indicating which VOB corresponds to which cell (V in CI)
OB_SRP), information on how many cells each PG contains
(C_Ns in PGI) also exists in the VIDEO RECORDING standard, so when using the PG related information file as described above,
Based on the VOB-cell correspondence and the number of cells per PG,
It is necessary to perform a process of uniquely specifying a PG-related file for each PG from the VOB (Cell). However, such a specific process based on the VOB-cell correspondence and the number of cells for each PG is performed by the DVD-RAM recorder.
-It will put extra processing on the RAM recorder.
Ideally, it is desirable to define information for uniquely specifying a PG-related file from a VOB (Cell) and to save the trouble of performing such processing. Therefore, the cell (VOB) and P
It is conceivable to define a table that associates the file name of the G related information file with the unique information. FIG.
(A) is a diagram showing a table in which cells (VOBs) are associated with file names of PG-related information files. In this figure, the PG related information file IFOPG1.dat contains Cell # 1 (VOB #
1) is associated, and the PG related information file IFOPG2.dat
Since it is clear that Cell # 2 (VOB # 2) is correlated, by referring to such a table,
It is possible to immediately determine which PG contains B.

When such a table is defined, the in-house recorder needs to record the table on the DVD-RAM, and updates such a correspondence table every time the PG is edited. Have an obligation to do so. FIG.
(B) is a figure which shows an example of the content of the correspondence table after editing. In FIG. 36A, the only VOB associated with IFOPG1.dat is VOB # 1, but FIG.
Then, VOB # 1, VOB are associated with IFOPG1.dat
# 2, VOB # 3, and IVOPG2.dat correspond to VOB # 4, VOB # 5, and VOB # 6, so before and after editing, the DVD-RAM recorder It can be seen that rewriting is performed. Before and after editing, DVD-RA
There is a problem that the M recorder bears the process of rewriting the table.

Even if the rewriting process is burdened, there is no problem if such a table is correctly rewritten, but the DVD-RAM storing the PG-related information file can be transferred to another recorder. When the recorder is loaded and another recorder performs editing, such as partial deletion, of the VOB included in the PG, there is a problem that such inclusion relation can no longer be maintained. That is, by another company's recorder
If the VOB is partially deleted and the VOB is divided, for example, the recorders of other companies do not have an obligation to update the correspondence table, so the correspondence table is left in an old state. If the VOB is edited in this way and the correspondence table is left in an old state, even if the information related to the broadcast program is recorded on the DVD-RAM in the PG related information file, such There is a problem that the file of the related information cannot be specified.

(Second Case) In the development of an alternative device for a VTR recorder, an interactive screen that allows the user to grasp at a glance what the content of the program is is desired. As such an interactive screen, when a plurality of programs are recorded on DVD-RAM, thumbnails corresponding to those programs are displayed.
It is desirable to have a plurality of them. However, as described above, in the VIDEO RECORDING standard, only one thumbnail can be provided for one program. Thumbnail
There is a problem that only one is displayed, giving a poor impression to the viewer.

What comes to mind is that the unique information is defined so as to associate a thumbnail with each of a plurality of scenes displayed in the program. That is, when each video object constituting the program is reproduced from a plurality of intermediate positions of the program, thumbnails are used as a plurality of intermediate reproduction information indicating what contents are reproduced. However, even if multiple thumbnails are made to correspond to one PG using such unique information, editing such as partial deletion of arbitrary scenes or partial insertion of other scenes to the program by another company's recorder When an operation is performed, VOB, PGC, and cell are updated by the editing operation,
Since the management information that associates this with the thumbnail is left as it is before editing, the correspondence between the thumbnail and the scene in the program is shifted, and the dialog screen with the correspondence between the thumbnail and the scene is shifted. Is displayed.

(Third Case) Recently, in terrestrial broadcasting and satellite broadcasting, a transmission service of broadcast guide information indicating a broadcast schedule of a daily or weekly program, a so-called Electric Program Gui.
de (EPG) broadcasting service is provided. By using the broadcast guide information transmitted in such a manner, the DVD-RAM recorder can efficiently perform the recording reservation processing of the broadcast program. In addition, the broadcast guide information transmitted as
In the RAM, the data can be recorded in a reserved area provided for each program, such as a primary text area and an item text area. If the broadcast guide information is recorded in the primary text area and the item text area secured for each program in this manner, the operator refers to the contents of the broadcast guide information, and the operator can determine how the program is. It is easy to remember at a later date if the program is a good one.

It should be noted that the broadcast guide information is a copyrighted work created by the organizer of the EPG broadcast service,
When recording the broadcast guide information and using it later, the D-RAM recorder must display a logo indicating that the copyright belongs to the organizer of the EPG broadcast service. By displaying such a logo, the DVD-RAM recorder allows the operator to know that the broadcast guide information has been obtained from the EPG broadcast service and that the copyright belongs to the organizer of the EPG broadcast service. . However, since the broadcast guide information recorded in the primary text area or the item text area is text information, if only the text information is edited, the broadcast guide information is rewritten as desired by the operator. If the EPG logo is displayed on the broadcast guide information that is freely rewritten by the operator and the identity of the copyrighted work is impaired, third parties who do not know the history of the rewriting will be able to use the rewritten broadcast The guide information is mistaken as if it were obtained from the EPG broadcasting service. That is, the broadcast guide information whose identity has been impaired is falsely displayed as if it were obtained from an EPG broadcast service, that is, a false display is performed.

If the functions of the in-house recorder are restricted so that the rewriting is not performed and the rewriting of the broadcast guide information is prohibited, false display of the EPG logo can be avoided. However, since DVD-RAM can be accessed by personal computers and various types of DVD-RAM recorders, even if prohibiting free rewriting of such text information in one model, the text information can be rewritten by another company's recorder. The rewritten DVD-RAM is again
When the DVD-RAM recorder is inserted into a DVD-RAM recorder recording broadcast guide information, the DVD-RAM recorder performs a false display of displaying the EPG logo on the rewritten broadcast guide information.

A first object of the present invention is to provide an optical disc on which unique information is recorded so that the relationship with the VOB can be maintained even when the time information about the VOB changes dynamically. To provide. A second object of the present invention is to
In addition to recording thumbnails of broadcast programs in excess of the number specified in the VIDEO RECORDING standard, if a broadcast program is edited by another recorder,
An object of the present invention is to provide an optical disc capable of causing a reproducing apparatus to detect a mismatch between information specified by the RECORDING standard and a thumbnail.

A third object of the present invention is to record broadcast guide information and, when the recorded broadcast guide information is likely to be rewritten by a recorder of another company, verify whether or not the rewrite has been performed by a reproducing apparatus. The present invention provides an optical disk that can be used for optical disks.

[0025]

A first object of the present invention is that a plurality of video objects each including moving image data, recording time information indicating a recording time of each video object, and encoding of each video object is started. The display start time information indicating the time to start displaying the moving image data and the difference value obtained by subtracting the display start time information from the recording time information among the plurality of video objects are obtained by the relative time based on the reference time. A plurality of program files that record information related to a plurality of video objects having the same value as information about a program constituted by the video objects are recorded. Each program file includes a corresponding program. From the recording time information for the video objects that make up, Difference value obtained by subtracting the start time information is achieved by an optical disc has been granted as the identification information.

The second object is to provide a plurality of pieces of intermediate playback information indicating what content is to be played when each video object constituting the program is played from a plurality of intermediate positions of the program. Entry point management information including a plurality of combinations of entry point designation information for designating the midway position of the program as an entry point of the program and recording time information at the time when the midway reproduction information for the midway position is recorded. If the recording time information of the video object is recorded at the same time as the copy of the recording time information included in the entry point management information, the correspondence between the plurality of pieces of intermediate playback information and the video object is valid. This is achieved by an optical disk indicating that

The third object is to secure a program and have a program-specific area in which text information about the program is recorded, and an extended area for the program-specific area. The text information required to maintain the identity is recorded in each of the program-specific area and the extension area, and the program file contains text information on the program contents, and the identity is maintained. Achieved by an optical disc containing undesired text information.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an optical disk, a recording apparatus for the optical disk, and a reproducing apparatus for the optical disk will be described with reference to the drawings.
In addition, each of the following sentences is given a classification number having the following system at the beginning of the sentence. The number of digits of the {x1_x2-x3_x4-x5} classification number indicates the hierarchical depth of the item. More specifically, x1 indicates the number of the embodiment, and x2 is the figure number cited in the description (in addition, when there is no figure to be particularly cited, the symbol "
X "is added.) X3 indicates a reference numeral of an object to be described in the configuration diagram shown in x2.
When an explanatory diagram is referred to to explain the components of x3 in more detail, the figure number of the explanatory diagram is shown. x5 indicates a reference number of a component in the quoted explanatory diagram (first embodiment) {1-1} Structure of DVD-RAM FIG. 1 shows an external view of a DVD-RAM disc which is a recordable optical disc. FIG. As shown in this figure, DVD-RAM
Is loaded into the DVD-RAM recorder while being stored in the cartridge 75. The cartridge 75 is for protecting the recording surface of the DVD-RAM.
At the time of storing the DVD-RAM 5, the DVD-RAM is accessed by opening and closing the shutter 76 (note that storing in the cartridge 75 is not essential, and it is needless to say that the DVD-RAM may be directly accessed). 1-2} Recording area of DVD-RAM FIG. 2 is a diagram showing a recording area of a DVD-RAM disc which is a recordable optical disc. As shown in the figure, DVD-RAM
The disc has a lead-in area at the innermost circumference, a lead-out area at the outermost circumference, and a data area between them.
In the lead-in area, a reference signal necessary for stabilizing a servo at the time of access of the optical pickup, an identification signal with another medium, and the like are recorded. The same reference signal as the lead-in area is recorded in the lead-out area. The data area is divided into sectors (2 kbytes) as the minimum access unit {1-3} Data configuration in DVD-RAM The logical configuration on DVD-RAM will be described. FIG. 3 shows a data structure on a disk identified through a file system.

At the head of the data area, management information for a file system called volume information is recorded. By passing through the file system, the data in the disk can be handled as directories and files as shown in FIG. The structure specified by the VIDEO RECORDING standard is DVD_RTAV directly under the ROOT directory as shown in FIG.
(RealTimeAV) directory, under which at least one or more AV files exist. AV files are classified into three files: moving images, still images, and audio dubbed into still images. These three AV
RTRW management file is 1 as file management information
Is placed. The directory structure specified in the VIDEO RECORDING standard has been described above. It should be noted in this figure that there is a file (PG related information file) containing information related to broadcast programs in addition to these. .

{1-4} Recording Method of AV File FIG. 4 is a diagram showing how an AV file is recorded on a volume area in a DVD-RAM. The video stream and the audio stream shown in the fifth row of FIG. 4 are divided into small parts of about 2 Kbytes as shown in the fourth row. The small parts obtained by the division are stored in a video pack-audio pack defined by the MPEG standard, and are stored in VOB # 1 and VOB # in the AV file shown in the third row.
2 is interleaved and multiplexed. AV files are ISO / IEC
Based on 13346, the data is divided into a plurality of extent data as shown in the second row and recorded in a free area in one zone area on the volume area shown in the first row. still,
Note that even if a plurality of VOBs are recorded on the DVD-RAM, those VOBs are collectively recorded in one AV file.

{1-5} Configuration of Video Stream FIG. 5 shows the configuration of the video stream. The video stream shown in FIG. 5 includes a plurality of pieces of picture data corresponding to one frame of image. The picture data is obtained by compressing an NTSC or PAL video signal according to the MPEG standard. Plural pieces of picture data obtained by compressing a video signal of the NTSC system are displayed in a video frame having a frame period of about 33 msec (accurately 1 / 29.97 sec).
A plurality of picture data obtained by compressing a video signal
It is displayed as a video frame having a frame period of 40 msec. 5 shows an example of a video frame. In the figure, a section specified by a pair of “<” symbol and “>” symbol indicates a video frame. In a video frame, the symbol “<” indicates the playback start time (Presentation_Start_Time) of the video frame, and the symbol “>” indicates the video frame playback end time (Presentation_End_Time). The closed section specified by these symbols includes a plurality of video fields.

The picture data to be displayed in such a video frame must be input to the decoder by the reproduction start time of the video frame, and must be extracted from the buffer by the decoder at the reproduction start time. The compression according to the MPEG standard is compression using spatial frequency characteristics in an image of one frame and time correlation characteristics with images to be reproduced in the past and in the future. , Each picture data is compressed using the bidirectionally predictive Pre
Predictive (B) pictures, Predictive (P) compressed using time correlation characteristics with images to be reproduced in the past direction
Intra compressed using the spatial frequency characteristics within one frame of image without using the picture and time correlation characteristics
(I) Converted to any of the pictures. In this figure
It should be noted that the B, P, and I pictures are shown with uniform sizes, but their data sizes vary.

In order to decode a P picture and a B picture that have been compressed using the time correlation property, it is necessary to refer to images to be reproduced in the past and future directions. For example, when decoding a B picture, it is necessary to wait until decoding of a future image that is a reference destination ends.

Therefore, in the MPEG video stream, the display order of each picture is defined and the coding order of each picture is defined. The second and third rows in FIG. 5 show the picture data arranged in the display order and the picture data arranged in the encoding order. In FIG. 5, it can be seen that the reference destination of the B picture is an I picture to be reproduced in the future. In the display order, this I picture exists after the B picture, but since the B picture is compressed by utilizing the correlation characteristics with the I picture, the B picture is decoded by this I picture. I have to wait for Therefore, in the encoding order, the decoding of the I picture is prescribed before the B picture. Changing the order from the encoding order to the display order is called reordering.

As shown in the third row in FIG. 5, each picture data is divided into units of about 2 KBytes in a state of being arranged in the encoding order, and stored in a video pack sequence as shown in the bottom row. In addition, if only P pictures and B pictures are used continuously, a problem occurs when decoding is performed in the middle of a stream in trick play or the like. Therefore, I pictures are inserted into picture data about every 0.5 seconds. This I
A picture data sequence from a picture to the beginning of the next I picture is called a GOP (Group of Pictures),
Is defined in the MPEG standard system layer as one compression unit. The “|” symbol in the third row of FIG. 5 indicates a GOP boundary. In the GOP, the picture type of the picture data located last in the display order must be a P picture, and the picture type of the picture data located first in the coding order must be an I picture.

{1-6} Configuration of VOB FIG. 6 is a diagram in which the configuration of the VOB is detailed in steps. VOB
(Video Object) # 1, # 2, # 3 ... are video streams and IS obtained by multiplexing audio streams.
A program stream that conforms to the O / IEC13818-1 standard and does not have a program_end_code at the end. That is, in the figure, the logical format located at the upper level is a detail of the logical format located at the lower level.

In the figure, the video stream located at the first stage is composed of a plurality of G streams shown in FIG.
Divided into OPs. As shown in FIG. 5, picture data in GOP units is divided into a plurality of 2KByte units. on the other hand,
The audio stream located on the right side of the first stage is divided into a plurality of units of about 2 KBytes as shown in the third stage. 2KByte
The picture data in GOP units divided into GOPs are interleaved and multiplexed with audio streams divided in about 2 KByte units to form a pack sequence shown in the fourth row.
Such a pack sequence includes a plurality of VOBUs (Video
Object Units are formed, and it can be seen that the VOB shown in the sixth row has a configuration in which a plurality of VOBUs are arranged in time series.
The lead line shown by a broken line in this drawing clearly shows which part of the lower logical format has been detailed in the upper logical format. Referring to the broken line in the figure based on this notation, the VOBU in the fifth row corresponds to the pack sequence shown in the fourth row, and further corresponds to the picture data in GOP units shown in the second row .

As is clear from the correspondence shown by the broken line, the VOBU is multiplexed with at least one or more GOPs composed of picture data whose reproduction time is about 0.4 to 1.0 seconds. It is understood that the unit is a unit including audio data, and is configured by arranging a video pack and an audio pack in the MPEG standard. In the MPEG standard, the unit called GOP is defined in the system layer, but the GOP indicates only video data as shown in the second row of FIG.
Audio data and other data multiplexed with the data (including sub-picture data and control data) are not specified in the GOP. In order to interpolate this, in the DVD-RAM standard, a VOBU is provided as a unit equivalent to a GOP, and at least one or more GOPs composed of picture data whose reproduction time is about 0.4 to 1.0 seconds, and this picture data Together with the multiplexed audio data.

The VOB is partially deleted using the VOBU as a minimum unit. For example, it is assumed that a video stream recorded on a DVD-RAM as a VOB includes a video such as a commercial having no recording value. Since the VOBU in the VOB includes one or more GOPs constituting the commercial and audio data multiplexed with the picture data, the VOBU corresponds to the commercial among a plurality of VOBs constituting the VOB. If only the part is deleted, it is not necessary to watch the video having no recording value as described above when the VOB is reproduced. Also, even if one VOBU is deleted,
In the VOBUs before and after the VOBU, a video stream exists in GOP units and an I picture is inserted at the head thereof, so that normal decoding and reproduction can be performed.

Each of the video pack and the audio pack included in the VOBU has a data length of 2 Kbytes. this
The size of 2 KByte matches the DVD-RAM sector size. Therefore, the video pack and the audio pack are recorded in each sector at a ratio of 1: 1. The arrangement of the video packs and the audio packs is equivalent to the arrangement of the logical sector rows, and the data stored in these packs is read from the DVD-RAM. That is, the arrangement of the video pack and the audio pack means the order of reading from the DVD-RAM. Each video pack has a storage capacity of about 2 KBytes.For example, since the data size of a video stream per VOBU is several hundred KBytes, the video stream is divided into several hundred video packs and stored. become.

Next, the structure of the management information file defined by the VIDEO RECORDING standard will be described. Here, the description mainly focuses on the management information for moving images, particularly PG (parts not directly related to the present embodiment are omitted,
Please refer to VIDEO RECORDING standard Ver 0.9 for details. ). {1-7} Configuration of RTRW Management File FIG. 7 is a diagram in which the contents of the RTRW management file in the embodiment are detailed in a stepwise manner. That is, in the figure, the logical format located on the right is a detailed version of the logical format located on the left, and the dashed line indicates that the logical format on the right is within the logical format on the left. It clarifies which part of has been refined. In the following description, for the information specified in the VIDEO RECORDING standard, in order to simplify the explanation, the full spelling of each information element is not described, but the information element is abbreviated in the VIDEO RECORDING standard. Shall be instructed.

According to such notation, VOB in FIG.
Referring to the logical format of FIG.
The management file is stored in the RTRVMGI
, M_AVFIT which is management information related to moving images, S_AVFIT which is management information related to still images, ORG_PGCIT, and UD
_PGCIT, TXTD_MG, and MNFIT. ORG_PGCI is
PGC_GI and PGI # 1, ... as shown by the broken line h1
.. #N, CI_SRP # 1... #N, and CI # 1.

The "CI (Cell Information)" contains general information (C_GI) about the Cell, as indicated by a broken line h2.
And the entry point information of each Cell (Cell_EP # 1 ...
・ #K). Here, “PGC” in “ORG_PGCIT” and “UD_PGCIT” defines a playback order of cells in which an arbitrary partial section (or all sections) in a VOB is one logical playback unit. In other words, VOB is one unit having a meaning as MPEG, and PGC is one unit in which the player performs reproduction.

"C_GI" is a search pointer (VOBI_SRP) to the VOBI of the VOB corresponding to the Cell, and a reproduction start time of the Cell (Cell_Start_PT) as indicated by a broken line h3.
M), the reproduction end time of the Cell (Cell_End_PTM), and the number of Cell entry point information (Number_of_Cell_EPIs). "M_AVFIT" includes VOB_STIT (VOB Stream attribute information table) as shown by a dashed leader line h4,
VOBIT (VOB information table). "VOB_STIT"
Is the VOB_STI number (Number_of
_STIs) and VOB STI # 1, which is attribute information about each VOB
.. #K. "VOB STI" is a dashed arrow h6
Video Attribute (Video Attribute Information), A
udio Number of Audio Streams, Sub Pic
number of streams (Number of Sub Picture Stream
s), Audio Attribute (Audio attribute information), Sub Picture A
ttribute (Sub Picture attribute information), Sub Picture Color
Consists of Pallete.

[VOBIT (VOB Information Table)]
Is the number of VOBIs (Number
_of_VOBIs) and each VOBI, and the VOBI is a reproduction start indicating the type of the VOB (VOB_Type) and the time at which the reproduction of the first video frame of the video stream constituting the VOB is started, as indicated by a broken line h8. Time (VOB_Start_PTM
(May be referred to as VOB_V_S_PTM)), a playback end time (VOB_End_PTM (also referred to as VOB_V_E_PTM)) indicating the time at which the playback of the last video frame of the video stream constituting the VOB ends, and a record indicating the recording date and time of the beginning of the VOB It is composed of elements such as date and time information (VOB_REC_TM), a reference pointer (VOB_STIN) to the VOB STI indicating the attribute information of the VOB, and time map information (TMAPI) of the VOBU constituting the VOB. In the VOBI of this figure, VOBs having a common attribute refer to the same VOB STI in the reference pointer (VOB_STIN). Thus, in the present embodiment, the occupied size in the DVD-RAM is kept small. The structure is taken up as an example this time. The information of VOB STI is the individual VOBI
It may be built in.

{1-8} RTRW Management File Next, referring to the logical format in FIG.
The management file will be described. The difference between FIG. 7 and FIG. 8 is that FIG. 7 does not show UD_PGCIT at all, while FIG. 8 shows UD_PGCIT. In FIG. 8, UD_PGCIT includes UD_PGCITI, UD_PGCI_SRP # 1... #N, and UD_PGCITI, as indicated by a broken line h9.
PGCI # 1... #N. UD_PGCI is a dashed arrow h10
..., PGC_GI, CI_SRP # 1 ... # m, CI # 1 ... #
Consists of n. Similar to FIG. 7, these CIs include general information (C_GI) on the Cell, as indicated by a broken line h2,
Entry point information of each Cell (Cell_EP # 1 ... #
k). C_GI is a broken line h as in FIG.
As shown in FIG. 3, the search pointer (VOBI_SRP) to the VOBI of the VOB corresponding to the Cell, the playback start time of the Cell (Cell_S
tart_PTM), Cell playback end time (Cell_End_PTM), Ce
Number of ll entry point information (Number_of_Cell_EPI
s).

{1-7.8} Time information It should be noted in this RTRW management file that the VOB_REC_TIME, VOB_Star
The point is that there are two time information, t_PTM. (For details of other management information, see DVD Application
Format for DVDRewritable Discs Part1 VIDEO RECODIN
Please refer to G standard ver 0.9). At first glance, the presence of two pieces of time information to represent the start time of one VOB seems redundant, but it is not. The two pieces of time information are
These are used for different purposes, and represent the start time of the VOB in different formats.

That is, while “VOB_REC_TIME” is recorded for the purpose of presenting the recording date, hour, minute, and second at which the VOB was recorded to the operator, the video playback start time “VOB_REC_TIME”
B_Start_PTM ”is used as a pair with the video playback end time VOB_V_E_PTM, and when two VOBs are played seamlessly,
Recorded for the purpose of calculating STC-Offset. STC offs
et is from VOB_V_E_PTM of the VOB that is played in advance,
This is a value obtained by subtracting VOB_Start_PTM of the VOB to be reproduced subsequently, and is used as an offset added to the reference time output by the system time clock STC. Even if the time stamp is discontinuous between VOBs, the playback device
By referring to the reference time to which C-Offset has been added,
The playback device can behave as if the time stamps between VOBs are continuous.

The reason why the time stamps between VOBs behave as if they are continuous will be described. In the DVD-RAM standard, an extended STD model (hereinafter, referred to as “E-STD”) is defined as a standard model of the playback device. Generally M
The PEG standard decoder has a system time clock STC for measuring a reference time, and the video decoder and the audio decoder perform decoding and display processing with reference to the reference time measured by the STC. E-STD
Means STC-Offset in addition to STC at the reference time output by STC.
, And one of the reference time output from the STC and the output value of the adder can be selected and provided to the video decoder and the audio decoder. With this configuration, even if the time stamps are discontinuous between VOBs, it is possible to behave as if the time stamps between VOBs are continuous by giving the output value of the adder to decoding. , Front VOB V
Even if the OB_V_E_PTM and the VOB_V_S_PTM of the rear VOB have a discontinuous relationship as described above, seamless reproduction is performed. For more detailed technical contents of the above E-STD and STC_offset, refer to International Publication No. WO97 / 13364.

[0050] "VOB_REC_TIME" is used for presenting the recording date, hour, minute, and second to the operator, and VOB_Start_PTM is used for seamlessly reproducing two VOBs whose time stamps are not continuous. VOB_REC_TIME and VOB_Start_PTM because they are used for completely different purposes
Represents the start time of the VOB in a unique format. First, the description of the VOB playback start time in VOB_REC_TIME will be described. In VOB_REC_TIME, the date, hour, minute, and second in which the VOB was recorded must be described, and the description format is defined as shown in FIG.

{1-9a} Configuration of VOB_REC_TIME FIG. 9A is a diagram showing a 5-byte format indicating VOB_REC_TIME. 6 bits from 0 to 5 are assigned to the second (Second [5..0]) of the recording date and time.
6 bits from bit to 11 bit (Minute [1..0], M
inute [5..2]). 5 bits from 12 bits to 16 bits are assigned to hour (Hour [4], Hour [3..0]), and 5 bits from 17 bits to 21 bits are assigned to day (Day
[4..0]), 4 bits from 22 bits to 23 bits are converted to month (Mon
th [1..0]), 5 bits from 26 bits to 31 bits are converted to year (Y
ear [5..0]), 8 bits from 32 bits to 39 bits
(Year [13..6]).

FIG. 9A is a diagram showing a 5-byte format indicating VOB_REC_TIME. Six bits from bit 0 to bit 5 are assigned to the second (Second [5..0]) of the recording date and time, and bits 6 to 11 are assigned to the minute (Min
ute [1..0], Minute [5..2]). 5 bits from 12 bits to 16 bits (Hour [4], Hour [3..0])
And 17 bits to 21 bits are assigned to the day (Day [4..0]), 22 bits to 23 bits are assigned to the month (Month [1..0]), and 26 bits to 5 bits up to 31 bits as year (Year [5..0]), 8 bits from 32 bits to 39 bits
Bits are assigned to year (Year [13..6]).

FIG. 9A shows a format in which time information is changed to a 5-byte variable, but this format can be used only for 47 years. Considering this point, Year 2
Calculation method using various formats, such as assigning byte, 1 byte for Month, 1 byte for Day, 1 byte for hour, 1 byte for minute, 1 byte for second, and converting them to 8-byte numbers for calculation Can be considered.

{1-9b} Configuration of VOB_Start_PTM On the other hand, in VOB_Start_PTM, it is not necessary to describe the date, hour, minute, and second when the VOB was recorded, but the time in VOB_Start_PTM is used to calculate STC-Offset. Therefore, time accuracy in seconds is insufficient, and must be expressed with time accuracy taking into account the frequency of the system time clock of 27 MHz. Therefore, VOB_Start_PTM describes time in a unique description format called a PTM description format.

In the PTM description format, the time to be described is expressed by a time accuracy of 1 / 27,000,000 seconds and 1 / 90,000 (= 300/2
This format is specified to be expressed using a time accuracy of 7,000,000) seconds. Here, the time accuracy of 1 / 90,000 seconds is based on the common multiple of the frame frequency of NTSC signal, PAL signal, Dolby AC-3, and MPEG audio, and is 1 / 27,0
The time accuracy of 00,000 seconds takes into account the STC frequency of 27 MHz.

FIG. 9B is a diagram showing a PTM description format. In the figure, the PTM description format has a base part (PTM_base) representing a quotient when the reproduction start time is divided by 1 / 90,000 seconds, and a remainder obtained by dividing the reproduction start time by the base part by 1 / 27,000,000 seconds. Extended part (PTM_
extension). As can be seen from the above description, VOB_REC_TIME and VOB_Start_PTM represent the time at which VOB playback is started with completely different time accuracy.

{1-10a.b} VOB_REC_TM in edit processing,
Update VOB_Start_PTM, set VOB_REC_TIME and VOB_Start
As described above, _PTM has a different time accuracy for expressing the start time of the VOB, but when the VOB is edited, how it is updated and how it is set Are common. When the editing work of deleting the head part of the VOB is performed, the VOB_REC_TM and VOB_
Explain how Start_PTM is updated. FIG.
As shown in FIG. 0 (a), there is a VOB recorded at 12:00:00 on September 2, 1999. If one minute of data is deleted from the beginning of this VOB, VOB_REC
_TM and VOB_Start_PTM are defined to be updated as shown in FIG. That is, a new value is obtained by adding the reproduction time of the deleted portion to the old value. In terms of the expression, new VOB_REC_TM = old VOB_REC_TM + length of deleted part new VOB_Start_PTM = old VOB_Start_PTM + length of deleted part.

In the case of FIG. 10B, the length of the deleted portion is 1 minute (= 0x00527ad8) in the time accuracy of the PTM.
In time accuracy of VOB_REC_TIME, the length of the deleted part is 1s
If they are econds, use VOB_REC_TIME, VOB_Start_
If added to each of the PTMs, new VOB_REC_TM is 1999 /
9/2 12:01:00 (= 1999/9/2 12:01:00 + 00:01:00), new VOB_Start_PTM is 0x00527ad8 (0x00000000 + 0x0
0527ad8).

It should be noted here whether the beginning of the VOB is deleted or whether the middle of the VOB is deleted and the remaining VOB is replaced with a new VOB (details will be described later. The time length of the preceding VOB is added to VOB_REC_TIME and VOB_Start_PTM), VOB_REC_TM and VOB_S
The point is that the same value is added to each tart_PTM. In other words, the fact that the same number is added means that VOB_RE
This means that the difference between C_TM and VOB_Start_PTM does not change before and after editing. Since the difference between the VOB_REC_TIME and VOB_Start_PTM does not change before and after the deletion editing, if this difference is used as the ID of the PG corresponding to the VOB, even if any of the above-described editing operations is performed on the VOB, The PG corresponding to the VOB can be uniquely determined.

In view of the property that the difference between VOB_REC_TM and VOB_Start_PTM does not change before and after editing, in the present embodiment, this difference is used as a PG identifier (PG_ID), and a file containing information related to a broadcast program is recorded. (FIG. 5
) Is assigned a file name including the PG_ID. In the example of FIG. 9, VOB_REC_TIME is set to 5
Although expressed in the byte format, in FIG. 10B, only the lower 4 bytes of VOB_REC_TIME are used.
This is because when the difference between VOB_REC_TM and VOB_Start_PTM is used as the PG identification information, the data length of the identification information is better when using the identification information of the 4-byte identification information than when using the 5-byte identification information. This is because the length can be shortened, and various processes using the identification information of the PG can be easily performed.

{1-11} VOB_Start_PTM and VOB_REC_TIME
FIG. 11 is a diagram showing the correspondence between VOB_Start_PTM and VOB_REC_TIME included in VOBI and the PG-related information file. In the figure, arrow y11,
As shown in y12, a subtraction of subtracting VOB_Start_PTM from VOB_REC_TIME is performed, and it can be seen that the result is defined as PG_ID. On the other hand, PG in FIG.
The related information file is given a file name of IFO (PG_ID) .dat that partially includes the PG_ID defined in this way.

The difference between VOB_REC_TIME and VOB_Start_PTM is
Because it is specified as G_ID. The link relationship between the VOB and the PG related information file is as follows. When a certain VOB is instructed and it is desired to obtain data of a PG corresponding to this VOB, a PG_ID is calculated from the VOB_REC_TM and VOB_Start_PTM of the VOB, a file including the PG_ID in a file name is searched, and information relating to the PG is obtained. To get.

On the contrary, the file containing the PG is specified,
If you want to get the corresponding VOB, get the PG_ID of the file, read VOB_REC_TIME and VOB_Start_PTM from each VOBI, calculate the difference between them, and identify the one whose difference matches the PG_ID. A VOB corresponding to a certain PG is specified. Hereafter, the specific PG_ID
The calculation method of will be described.

{1-12} Partial deletion of PG including two Cell information and VOB FIG. 12 shows two Cell (Cell # 1 and Cell # 2) and two V
FIG. 9 is a diagram showing a PG # 1 composed of OBs (VOB # 1, VOB # 2). Each Cell refers to VOB # 1 and # 2, and VOB #
1, VOB # 2 shall be recorded continuously. VOB_ for VOB
Information called REC_TM and VOB_Start_PTM is defined in VOBI.

In this case, VOB_REC_TIME and VOB_Start_PTM do not change for VOB # 2 specified in cell # 2, but it is assumed that VOB # 1 has its head part partially deleted. In this case, VOB_REC_TIME and VOB_Start_PTM
Is added with the time length corresponding to the deleted portion. In the case of FIG. 12, the length of the deleted portion is 1 minute as in the case of FIG.
(= 0x00527ad8), these are VOB_REC_TIME, VOB_REC_TIME
Add to each of _Start_PTM to get new VOB_REC_TM
Is 1999/9/2 12:01:00 (= 1999/9/2 12:01:00 + 00: 01: 0
0), and new VOB_Start_PTM is 0x00527ad8 (= 0x00000
000 + 0x00527ad8).

In the time accuracy of VOB_REC_TIME, (length of deleted portion) is 1 second, so 0x00527ad8 is set to 1 minute.
minute, then VOB_REC_TIME = 0x6644c040
(1999/9/2 12:01:00) VOB_Start_PTM = 0x00000040 (1s
PG_ID (= 0x6644c000) is obtained by reducing econd). Here, consider the case where PG information is recorded in a file. The PG_ID is calculated by the method described above. For example, when the PG_ID is calculated to be 0x6644c000 in the example shown in FIG. 11, a file having the PG_ID = 0x6644c000 as a part of the file name is created. That is, a file having a file name “IFO6644c000.dat” is created by adding “IFO” to the beginning of the PG_ID = 0x6644c000 and adding an extension (.dat), Includes related information.

It should be noted that a file containing the PG_ID in the file name is created and information related to the PG is recorded.
Prepare one file for recording PG related information, divide the file into a plurality of areas, and use
PG_ID may be used. {1-13｝ VOB_REC_TIME-VOB_Start_ at partial deletion
Update of PTM VOB_R in VOBI for newly generated VOB when editing work to delete the middle part of VOB is performed
The following describes how EC_TM and VOB_Start_PTM are set. FIG. 13 is a diagram illustrating how the PG_ID is set for a newly generated VOB when a middle part of the VOB is deleted. PG # 1 shown in FIG.
VOB # 1 recorded at 12:00:00 on September 2, and Cell # 1. Among them, as shown in FIG.
Part of the VOB is deleted, and the part after the deleted part is
B # 2). Here, if the length from the beginning of VOB # 1 to the deleted portion is Length1, and the length of the deleted portion is Length2, VOB_REC_TIME for VOB # 2
Is (VOB_REC_TIME of VOB # 1 + Length1 + Length2), and VOB_Start_PTM for VOB # 2 is (VOB_S of VOB # 1
tart_PTM + Length1 + Length2).

As described above, by adding Length1 and Length2, VOB_REC_TIME for VOB # 2 becomes “1999”.
/ 9/2 13:00:00 ", and VOB_Start_PTM for VOB # 2
Is "0x1354caa0". The RTRW management file includes VOB_REC_TIME and VOB_Sta
A new VOBI including rt_PTM is added. {1-14} PG_ID for new VOB After that, PG_ID is calculated as shown in FIG. FIG.
FIG. 11 is a diagram showing how a PG_ID corresponding to a new VOB obtained by deleting a middle part of VOB # 1 is calculated. In this case, as in FIG. 11, Length1 and Length2 to be added to VOB_Start_PTM are converted into minutes, and then VOB_REC_TIME (VOB # 1) + Length1 + Length2 to VOB
By subtracting _Start_PTM (VOB # 1) + Length1 + Length2, the PG_ID of the PG corresponding to VOB # 2 (= 0x6644c00
0). {1-12.13-1} Summary of PG_ID calculation method When a certain VOB is instructed and the user wants to acquire the data of the PG corresponding to this VOB, even if the instructed VOB has the head part deleted. Even by deleting the middle of the VOB, even if it is newly generated, only PG
Will be specified.

Conversely, the file containing the PG is specified,
If you want to get the corresponding VOB, even if the beginning of the VOB is deleted, the VOB's VOB_REC_TIME, VOB_Sta
Even if rt_PTM is updated to a new value,
Since the difference does not change, the VOB can be uniquely specified from the PG_ID. Also, even if the middle part of the VOB corresponding to the PG is deleted from the point when the file containing the PG is recorded and two or more VOBs are generated, the difference between VOB_REC_TIME and VOB_Start_PTM in these new VOBs is Since it does not change from that of the original VOB, the VOB can be uniquely specified from the PG_ID.

{1-15} Calculation of PG_ID for VOBs belonging to completely different PGs The procedures of FIG. 13 and FIG. However, it does not mention how the PG_ID is calculated for VOBs belonging to completely different PGs. Therefore, referring to FIG. 15, VOBs belonging to completely different PGs
The following describes how the PG_ID is calculated.

In FIG. 15A, PG # 1 is Cell # 1, VO
B # 1 is included, and PG # 2 is assumed to include Cell # 2 and VOB # 2. In this case, VOB_REC_TIME for VOB # 2 is "
1999/9/2 13:00:00 ", and VOB_Start for VOB # 2
_PTM is "0x00000000". In FIG. 15B, VOB # 2
It is assumed that the editing operation of deleting the leading part of the is performed. In this case, if 45 seconds long data is deleted from the beginning of VOB # 2 recorded at 13:00 on September 2, 1999, VOB_REC_TM and VOB_Start_PTM are set as shown in FIG. You. In other words, 45 seconds, which is the deleted part,
It is added to each of VOB_REC_TM and VOB_Start_PTM. This can be expressed as follows: new VOB_REC_TM = old VOB_REC_TM + (length of deleted portion) new VOB_Start_PTM = old VOB_Start_PTM + (length of deleted portion).

In the case of FIG. 12, in the time accuracy of the PTM,
The length of the deleted part is 0x3ddc22 and the time accuracy of VOB_REC_TIME is 45 seconds, so the length of the deleted part is 45 seconds.
From 02d (1999/9/2 13:00:45) to VOB_V_S_PTM0x0000002d (45
PG_ID (0x6644d00) is obtained by subtracting second).

Here, VOB_REC_TIME for VOB # 1 in FIG. 15A is 1999/9/2 12:00:00, and VOB_S
If tart_PTM is "0x00000000", P for VOB # 1
G_ID is “0x6644c000” as calculated in FIG. VO
Since the PG_ID (0x6644d00) calculated for B # 2 is clearly different from the PG_ID "0x6644c000" calculated for VOB # 1, these two VOBs indicate different PG_IDs without being confused with each other. Will do.

{1-16} Setting of PG_ID at the time of division FIG. 16 shows how PG_ID of each VOB is set when VOBs included in two PGs are divided by an editing operation. FIG. In FIG. 16A, PG # 1 includes Cell # 1 and VOB # 1, and PG # 2 includes Cell #
2, including VOB # 2. PG_I for these two VOBs
D subtracts VOB_Start_PTM from VOB_REC_TIME, so that PG_IDs of PGs corresponding to VOB # 1 and VOB # 2 are set to different values.

In FIG. 16B, the first VOB # 1 (old)
Means VOB # 1 (new), VOB # 2 (new), VO
It is divided into three VOBs called B # 3 (new). Second VOB # 2
(Old) has three types: VOB # 4 (New), VOB # 5 (New), and VOB # 6 (New).
Divided into VOBs. In this case, from VOB_REC_TIME of VOB # 1
The difference obtained by calculating VOB_Start_PTM of VOB # 1 (the difference for VOB # 1), the difference for VOB # 2,
The differences for B # 3 are equal values.

On the other hand, from VOB_REC_TIME of VOB # 4,
The difference (VOB # 4) obtained by calculating B_Start_PTM
, VOB # 5, and VOB # 6 have the same value. {1- × -1} If the PTM is not divisible by seconds, the playback time or VOB_Star of the deleted part
When converting the time of t_PTM, if those values are not integral multiples of seconds, a rounding error occurs in the subsecond precision. In such a case, the system must determine in advance whether the error should be discarded or rounded up.

VOB_REC_TIME is set to 12:00:00 on September 9, 1999 (= 0x664)
Consider a case in which data of 15 frames for 30 seconds is deleted from a VOB that is 4c000). First, the PG_ID before deletion is 0x6644c00
0 (= 0x6644c000-0x00000000). Next PG_ID after deletion
think of. 30 seconds and 15 frames of data are 0 when converted by PTM
x29ed61. It is updated to 0x29ed61 considering VOB_Start_PTM. When adding 15 frames of 30 seconds to 12:00:00 of 1999/9/2 on VOB_REC_TM, 15 frames are rounded up and 1 second is added. Then, VOB_REC_TM is 1999/9/2 12: 00: 3
It becomes 1. When calculating the PG_ID using the new VOB_REC_TM and VOB_Start_PTM, considering the handling of fractions of VOB_Start_PTM, which is shorter than the second, is rounded up in the same way as when updating VOB_REC_TM, 0x6644c01f-0x0000001f = 0x6644c000, which is the same value as before deletion. Become. But here, VOB_St
If we consider the fraction of subseconds of art_PTM and consider it, 0x6644c01f-0x0000001e = 0x6644c001, which is an ID different from PG_ID before deletion.

As described above, if the handling of fractional values of seconds or less is not standardized in the system, the PG_ID may shift before and after deletion. Such processing is necessary for VI
This is because the time format of VOB_REC_TIME specified by the DEORECORDING standard cannot hold information of a system of sub-seconds. {1- × -2} Handling of PG_ID in rearranging the order of cells When the order of cells in a PG is changed by an editing operation, the first VOB of the PG is also changed. In this case, using the VOB_REC_TM and VOB_Start_PTM of the newly
PG_ID must be calculated and reassigned.

Note that if the VOB in the PG is searched by VOB_REC_TM and the VOB_REC_TM always takes the oldest one and calculates the PG_ID, the PG_ID is newly added even if the order of the cells is changed. There is no need to reassign. This concludes the description of the DVD-RAM, and then starts the description of the DVD-RAM recorder.

{1-17-70.71.72.73} External View of DVD-RAM Recorder The DVD-RAM recorder according to the present embodiment has both functions as a DVD-RAM reproducing device and a recording device.
FIG. 17 shows a configuration example of a system using a DVD-RAM recorder in the present embodiment. DVD-RA in this system
The M recorder (hereinafter, referred to as a DVD-RAM recorder 70) includes a remote controller 71, a television receiver 72 connected to the DVD-RAM recorder 70, and an antenna 73. The DVD-RAM recorder 70 is assumed to be used as an alternative device with an editing function of a video tape recorder that is widely used as a television broadcast recorder. This shows a case where the RAM recorder is used in a home. The DVD-RAM is used as a recording medium for the DVD-RAM recorder 70 to record a television broadcast.

When a DVD-RAM recorder is loaded with a DVD-RAM, the DVD-RAM recorder 70
NTSC signal is compressed and recorded as VOB on DVD-RAM.
The video stream and the audio stream included in the VOB recorded on the DVD-RAM are expanded and the video signal or the NTSC signal or the audio signal is output to the television receiver 72.

{1-18} Internal Configuration of DVD-RAM Recorder FIG. 18 is a block diagram of the DVD-RAM recorder 70. In FIG. 18, the DVD-RAM recorder 70 includes a user interface unit 131, a system control unit 132, an input unit 133 including a camera and a microphone or a TV tuner, a video encoder VE, and an audio encoder.
An encoder section 134 including an AE and a system encoder SE; an output section 135 including a monitor and a speaker; and a decoder section 136 including a system decoder, an audio decoder, and a video decoder.
, A track buffer 137, a drive 138, and a time management unit 139 that measures the current time.

{1-18_131} User Interface Unit 13
1 receives a request from a user. The user interface unit 131 sends a request from the user to the system control unit 13.
Tell 2 {1-18_132} The system control unit 132 interprets a request from the user, and in accordance with the request, requests processing from each module, and generates management information defined in the VIDEO RECORDING standard. This processing request is performed when a user requests video recording and recording {132-19-1}, and is performed when information of an encoded VOBU is notified {132-19-2}. }, What to do when a certain amount of system streams are accumulated in the track buffer 137 {132-19-3}, what to do when a stop request from the user is transmitted to the user interface unit 131 {132- 19-4}, there is a process {132-20} for displaying a list of PGs.

{1-18_132-19} FIG. 19 is a flowchart showing the processing contents of the system control unit 132. Or later,
While referring to this flowchart, the system control unit 13
2 will be described. {1-18_132-19-1} DVD
-When the RAM recorder is activated, the process proceeds to step S1, and waits for a user to request recording of a moving image. When an operation is performed on the remote controller 71 and a request for recording is made, the system control unit 132 sets the encoder unit 134 to the settings (such as the video compression method and the system bit rate) requested from the user interface unit 131 in step S2. Is set, and in step S3, a template of VOB STI, VOBI, and CellI shown in FIG. 7 is created. Thereafter, the process proceeds to step S4, and requests the encoder unit 134 to encode the video frame and encode the audio. At this time, in step S5, the system control unit 132 acquires the current time from the time management unit 139, sets the time in VOB_REC_TM in the VOBI, and then enters an event waiting state including steps S6 to S7 to S8. . The determination step of step S6 is for determining whether or not the VOBU information has been notified from the encoder unit 134. The determination step of step S7 is for determining whether the accumulated amount of the system stream in the track buffer 137 has reached a predetermined amount. It is to determine whether or not it has been done. The determination step of step S8 is for determining whether or not a stop request from the user has been transmitted to the user interface unit 131. Thereafter, the system control unit 132 repeats the processing of steps S6-step S7-step S8 until any of these determination steps is determined to be Yes.

{1-18_132-19-2} VOB that has been encoded
When the information of U is notified, the system control 132 updates the management information shown in FIG. 6 based on the VOBU information, with the result of step S6 being Yes and the process proceeding to step S9.
The VOBU information notified here includes the following. • VOBU Start PTM (video frame playback start time in VOBU) • Refernce Picture Size (initial I-picture size with the VOBU start at "0") • VOBU Size (number of multiplexing units) • Aspect ratio • AUDIO mode • AUDIO stream Number To be specific, the processing to be executed based on this information is: TMAPI update (addition of TMAP_ENT, VOBU_ENT), VOB_E
This is an update of nd_PTM and Cell_End_PTM. Of the VOBU information sent first after recording starts,
Used for setting B_Start_PTM and Cell_Start_PTM. When such an update process is completed, the system control unit 132 performs a loop process including steps S6 to S7 to S8 again.

{1-18_132-19-3} Track buffer 137
If a certain amount of system streams are stored in the DVD-ROM, the system control unit 132 proceeds to step S10 with step S7 being Yes, and transfers the system stream data stored in the track buffer 137 through the drive 138 to the DVD-ROM. Record to RAM disk. After the recording, the system control unit 132 returns to step S6-step S7-
A loop consisting of step S8 is performed.

{1-18_132-19-4} When a stop request from the user is transmitted to the user interface unit 131, step S8 becomes Yes, the process proceeds from step S8 to step S11, and the recording and recording are performed by the encoder unit 134. Send recording stop command. After that, the system control unit 132
When the end of the encoding process is transmitted from the encoder unit 134, the track buffer 1 is transmitted through the drive 138.
All remaining system stream data stored in 37 is recorded on a DVD-RAM disk. After the above operation is completed, in step S12, the system control unit 132 transmits the VOBI and CellI described above to the DVD-R through the drive 138.
Record on an AM disk.

By performing the above procedure, the system control unit 132 converts the information specified by the VIDEO RECORDING standard into D
Although it can be recorded on the VD-RAM, if the video-audio to be recorded is a broadcast program, it may be desirable to record information related to this broadcast program in a file and record it on a DVD-RAM. In order to respond to such a request, the system control unit 132 performs a process of creating a PG_ID corresponding to the broadcast program and assigning it to this file. That is, after recording the VOBI and the Cell information on the DVD-RAM in step S12, it is determined whether or not the setting to create the PG_ID is set in step S13. If it has been set, the system control unit 132 determines in step S14
Extract VOB_REC_TM and VOB_Start_PTM included in VOBI. After that, in step S15, PG_ID is obtained by converting VOB_Start_PTM into time accuracy of seconds and subtracting it from VOB_REC_TIME. That is, in order to calculate the difference from the recording date and the PTM, the recording time is converted to 4 bytes. Also
The PTM converts to a time based on seconds, calculates the difference, and calculates
Calculate D. Then, in step S16, IFO (PG_
DVD with a data format file having the file name of (ID) .DAT
-Record RAM.

{1-18_132-20-1} PG list display processing When the DVD-RAM in which the PG_ID is assigned and the PG related information is recorded in the procedure of the present embodiment is loaded into the DVD-RAM recorder, The system control unit 132 performs a PG list display process shown in the flowchart of FIG. Hereinafter, the PG list display processing will be described with reference to the flowchart of FIG.

At step S81, the system control unit 1
32 reads out all Cell information included in ORG_PGCI. In step S82, the system control unit 132
Referring to VOBI_SRP in the read Cell information, each C
The VOB corresponding to the ell information is specified, and in the subsequent step S83, VOB_REC_TM, VO
Read B_Start_PTM.

In step S84, the system control unit 1
32 converts VOB_Start_PTM into time accuracy of seconds, and
PG_ID is obtained by subtracting from REC_TIME. In step S85, the system control unit 132 sets the calculated PG
In step S86, in which the _ID has the same value and the corresponding Cell information are grouped to make each group a single PG, the system control unit 132 sets the state including the grouped Cell information. Display the interactive screen including the PG.

In this embodiment, PG_ID is obtained by converting VOB_Start_PTM into time accuracy of seconds and subtracting from VOB_REC_TIME. However, converting VOB_Start_PTM into time accuracy of seconds and subtracting VOB_REC_TIME from VOB_Start_PTM. May be used to obtain the PG_ID. {1-18_132-21} Example of Dialog Screen FIG. 21 is a diagram illustrating an example of the dialog screen displayed in step S86. In this figure, PG # 1 is Cell # 1,
Cell # 2, including Cell # 3, PG # 2, Cell # 4, Cell # 5, Cell
You can see that it contains # 6.

[99.2.5 21: 00-23: 00] in this figure
Is the recording date and time of PG # 1, and the VOB in VOB # 1
Displayed based on the recorded contents of _REC_TIME. Also "4c
“h” and “Movie Title” are a part of the broadcast guide information distributed by the EPG broadcast service (the recording method of the broadcast guide information is not described in the present embodiment, but is described in the third embodiment. )), Thumbnails are PG # 1, PG
An image to be displayed at the time of reproduction of # 2 is reduced (thumbnail recording method will not be described in the present embodiment but will be described in the second embodiment). With this interactive screen displayed, pressing the cursor key is enabled, and the operator can instruct the DVD-RAM recorder to play back the PG or open the PG-related information file.

{1-18_132-20-2} Processing after Display of Dialogue Screen After displaying such a dialogue screen, the system controller 13
Step 2 shifts to a loop process consisting of steps S87 and S88. In step S87, the system control unit 132 determines whether or not an instruction to read related information has been issued to any PG.
At 88, the system control unit 132 determines whether reproduction has been instructed to any PG.

When an instruction to read related information is issued, step S87 becomes Yes and the process moves to step S89.
The system control unit 132 searches for a file in a data format having a file name of IFO (PG_ID) .DAT and reads the file from the DVD-RAM. Then, in step S90, the data recorded in the PG related information file is displayed. Meanwhile, P
When a reproduction instruction is issued to G, step S88 is Yes.
And the process proceeds to step S91, where the system control unit 13
2 acquires the PG_ID of the specified PG. In step S92, the system control unit 132 determines that VOBI # 1.
Identify the #L whose difference between VOB_REC_TIME and VOB_Start_PTM matches the acquired PG_ID. Step S93
In, the system control unit 132 reads all the Cell information corresponding to the specified VOBI, and in step S94, the system control unit 132 reproduces the VOB according to all the read Cell information.

The description of the system controller 132 has been completed above, and then the description of the encoder 134 is started. {1-18_134} The encoder unit 134 includes a video encoder VE, an audio encoder AE, and a system encoder SE, and performs processing when a setting request such as a video compression method or a system bit rate is set by the system control unit 132. 134-1}, perform the process {134-2} when a recording and recording stop command is transmitted {1-18_134-1}
When a setting request such as a video compression method and a system bit rate is set by the system control unit 132, the encoder unit 134 encodes a video frame sent from the input unit 133 to generate video data, and at the same time, generates the video data. The audio data transmitted from the external device 133 is encoded to generate audio data. The generated video data and audio data are system-encoded to create a system stream, and the track buffer 137 is generated.
Send to At the same time, every time the system encoding of the VOBU is completed, the encoder unit 134 notifies the system control 132 of information on the encoded VOBU.

{1-18_134-2} When the recording and recording stop instructions are transmitted, the encoder unit 134 completes all encoding with the system encoding up to the audio frame generated immediately thereafter, and completes the generated system stream. After the data is transferred to the track buffer 137, the end of the encoding process is notified to the system control unit 132. As described above, according to the present embodiment, the same numerical value is added to VOB_REC_TM and VOB_Start_PTM regardless of whether the beginning of the VOB is deleted or whether the middle of the VOB is deleted and the rest is set as a new VOB. The difference between these VOBs
Since the information related to this broadcast program is recorded in the file to which the identifier is assigned using the identifier of the broadcast program related to the VOB, even if the file is edited, it is compatible with VOB. Broadcast program to be executed can be uniquely determined.

In this embodiment, VOB_REC_TIME and VOB_St
Although the identifier including the difference of art_PTM is assigned to PG, it may be assigned to PL. A playlist (PL) is composed of one or more cells (in the VIDEO RECORDING standard, PL is sometimes called user-defined PGC information). PL is VIDEO R
The user-defined PGC information itself specified in the ECORDING standard means.

The PL is a partial section itself (all sections) specified by the cell information in the PG, or further inside (a partial section) than the partial section specified by the cell information in the PG. In addition, the partial section specified by one cell information may be specified by another cell information overlapping. That is, there may be overlap between cells. Further, a partial section specified by certain cell information may be separated from a partial section specified by another cell information. That is, there may be a gap between cells. In the PL, not all the partial sections in the VOB need be specified, and some of the VOBs may not be specified.

When determining such a PL identifier, a difference between VOB_REC_TIME and VOB_Start_PTM may be obtained by the procedure in this embodiment, and an identifier including the difference may be assigned to the PL. (Second Embodiment) The second embodiment is an improvement related to recording of a thumbnail.

FIG. 22 and FIG. 23 show the RT in the embodiment.
FIG. 4 is a diagram in which the recorded contents of an RW management file are detailed in a stepwise manner. That is, in the figure, the logical format located on the right is a detailed version of the logical format located on the left, and the dashed line indicates that the logical format on the right is within the logical format on the left. It clarifies which part of has been refined.

{2-22} Data Structure of RTRW Management File in Second Embodiment The difference between FIG. 22 and FIG. 23 is that FIG. 22 shows details of ORG_PGCI, while FIG. And UD_PGCIT. First, referring to the logical format of VOB in the figure according to such notation,
In FIG. 22, ORG_PGCI indicates PGC_GI, PGI # 1... #N, CI_SRP # 1.
.. #N, and the CI consists of C_GI and EPI # 1... #K as shown by the broken line h2 in FIG. 7 of the first embodiment. Is as described in the description.

The difference between FIG. 22 and FIG. 7 is that the contents of MNFIT, whose details have not been described in FIG. 7, are clarified in FIG. In FIG. 22, MNFIT
Are MNFI and MNFI_, as indicated by a broken line h11.
.. #J and MNFI # 1... #J. Each MNFI:
As shown by the broken line h12, the MNF_ID and the MNFI_RE
C_TM and tbn_MNG # 1, # 2,... tbn_MNG is Cell
_order, EP_order, VOB_REC_TM, and offset, and as shown by the dashed arrow y11, the EPI included in the CI of ORG_PGCI is associated with each tbn_MNG.

{2-23} Data Structure of RTRW Management File in Second Embodiment Next, FIG. 23 will be described. In FIG. 23, UD_PGC
IT is UD_PGCITI, as indicated by the dashed leader line h9.
UD_PGCI_SRP # 1... #N and UD_PGCI # 1. UD_PGCI is, as shown by a broken line h10,
PGC_GI, CI_SRP # 1... #N, and CI # 1... #N.
EPI # 1... #K. These points are as described in the description of FIG. 8 of the first embodiment. FIG. 23 differs from FIG. 8 in that the contents of the MNFIT are clarified as in FIG.

In FIG. 23, MNFIT is represented by MNFI, MNFIT_SRP # 1... #J, and MNIT
FI # 1... #J. Each MNFI is a dashed leader h1
As shown in FIG. 3, MNF_ID, MNFI_REC_TM, tbn_MNG # 1,
# 2 ... tbn_MNG is PL_order and Cell_order
, EP_order, VOB_REC_TM, and offset, and is different from FIG. 22 in that PL_order is added. Also, as shown by the dashed arrow y12, each tbn_MNG
Is different in that they are associated with CIs included in UD_PGCIT.

{2-24} tbn_MNG in the second embodiment,
FIG. 24 is a diagram illustrating the correspondence between tbn_MNG and the thumbnail created for the PL. The thumbnails in the figure are associated with the in point and the out point of cell # 1 in PlayLIst # 15 including cell # 1 and cell # 2. Cell # 1 in
Points and out points are VOB # 3 recorded on March 1, 2000 at 22:10:00
At the location separated by the offset x and the offset y from the beginning of the arrow, and at the in point and the out point, two thumbnails of th1.tbn and th2.tbn are respectively indicated by arrows y2.
They are associated as shown in 1, y22. Management information about these two thumbnails is registered in tbn_MNG. Tbn_MNG # 1 in the figure is th1.tb as indicated by arrow y23.
n, and tbn_MNG # 2 corresponds to th2.tbn as indicated by an arrow y24. Where th1.tbn
Is associated with the cell of Cell_order # 1 included in PlayLIst # 15, that is, cell_1, so PL_order and Ce
ll_order is set to "15" and "1", respectively. Also,
Since these thumbnails were created for VOB offset x and offset y recorded at 22:10:00 on March 1, 2000, VOB_REC_TIME of tbn_MNG # 1 contains
The date is described as 22:10:00 on month 1, and the offset is described as offset x. In addition, 2 for VOB_REC_TIME of tbn_MNG # 2
It is described as 22:10:00 on March 1, 000, and the offset is described as offset y. In addition, offset x, offset
y may be described as a relative time from the head of the VOB, or may be described as a relative data length from the head of the VOB.

{2-25} tbn_MNG in the second embodiment,
FIG. 25 is a diagram showing the correspondence between tbn_MNG and the thumbnail created for the PG. The thumbnail in this figure is provided in cell # 1 of PG1 composed of cell # 1 and cell # 2.
It is associated with EP # 1. Cell # 1 is 2000
This corresponds to VOB # 3 recorded on March 1, 22:10:00, and EP # 1 exists at a position separated by an offset x from the beginning of VOB # 3. This EP # 1 has th3.
A thumbnail called tbn is associated as shown by an arrow y25. The tbn_MNG # 3 in the figure corresponds to the thumbnail th3.tbn as indicated by the arrow y26. Where th3.tbn
Is the first entry point of PG # 1, so Ce
ll_order and EP_order are set to "1" and "1", respectively. These thumbnails are also available on March 1, 2000, 22: 1
Since it was created for the offset x of the VOB recorded at 0:00, the VOB_REC_TIME of tbn_MNG # 3 contains March 2000
It is described as 22:10:00 a day, and the offset is described as offset x.

{2-18} Internal Configuration of DVD-RAM Recorder in Second Embodiment Next, the internal configuration of the DVD-RAM recorder in the second embodiment will be described. The internal configuration of the DVD-RAM recorder according to the second embodiment is not different from the internal configuration of the DVD-RAM recorder shown in the first embodiment. However, since MNFI is added in the second embodiment, DV in the second embodiment
The system control unit 132 in the D-RAM recorder 70 is improved to perform two modes, a thumbnail setting mode and an entry point verify mode.

{2-18_132-26.27} FIG. 26 is a flowchart showing the processing contents of the system control unit 132 in the thumbnail setting mode, and FIG. 27 is a flowchart showing the processing contents of the system control unit 132 in the entry point verify mode. It is. {2-18_132-26} Once the thumbnail setting mode is specified,
The system control unit 132 determines in step S2 in FIG.
1 to display a list of PGs and PLs in the DVD-RAM, and in step S22, the system control unit 132
It will be in the state of waiting for the selection operation of G and PL. If the PG selection operation is performed by the operator, the reproduction of the PG selected in step S23 is started, and step S24-step S24 is performed.
Then, the processing shifts to a loop processing consisting of 25. Step S24
Is a determination step for determining whether or not an operation of setting a screen to be recorded as a thumbnail is performed.
Reference numeral 25 is a determination step for determining whether or not the reproduction of the PG and the PL has been completed. When the thumbnail setting operation is performed, the process proceeds from step S24 to step S26, in which the picture data reproduced at the time when the setting operation is performed is reduced, a thumbnail is created, and a file including the thumbnail is recorded on a DVD-ROM. Record in RAM. At this time, an entry point is added to the place where the setting operation is performed in step S27, the MNFI corresponding to the entry point is added to the MNFIT in step S28, and in step S29, the EP_ord which is the order in which the entry point is set is set.
er is recorded in the MNFI. Subsequently, in step S30, if the PL being reproduced is a PL, this PL_order is recorded in the newly added MNFI.

Thereafter, in step S31, the cell and VOB corresponding to the PG (PL) being reproduced are specified, and in step S32, the PL_order of those PG (PL) and the cell
Record Cell_order in the newly added MNFI. Then, in step S33, the VOB for the specified VOB
_REC_TIME and an offset from the head of the VOB to the position where the setting operation is performed are recorded in the newly added MNFI. Upon completion of the processes in steps S27 to S33, the process shifts to a loop process including steps S24 to S25, and waits for the next thumbnail to be set. Multiple thumbnails for PG (PL) are recorded on DVD-RAM, and MNFI for those thumbnails is
When the playback of the PG (PL) is completed,
25 becomes Yes, and it is in the state of waiting for the setting operation of PG and PL in step S22.

By repeating the above procedure, the DV
A plurality of thumbnails are recorded in the D-RAM, and MNFIs for these thumbnails are added to MNFIT. {2-18_132-27} Next, the thumbnail display processing in FIG. 27 will be described. When the process of this flowchart is started, a loop process including steps S42 to S52 is started. The repetition condition in the loop processing consisting of steps S42 to S52
53, as shown in step S54, RTRW
.. #J included in the MNFIT of the management file, the processes of steps S42 to S52 are repeatedly executed. Hereinafter, this loop processing will be described for any one of the MNFIs included in the MNFIT of the RTRW management file. First, in step S42, the target MNFI is read from the MNFIT of the RTRW management file. In step S43, VOB_REC_TIME included in the MNFI is extracted. Similarly, step S
In step S44, the VOB_REC_TIME included in the VOBI is extracted, and in step S45, the VOB_RE_TIME included in the MNFI is extracted.
Check C_TIME against VOB_REC_TIME included in VOBI. Such matching allows the cell entry point and
It is possible to detect whether or not the correspondence with the VOB is shifted.

When a DVD-RAM on which a thumbnail is recorded is once inserted into a recorder of another company and a part of the VOB is deleted by the recorder of another company, the VOB_REC_TIME in the VOBI is deleted.
Has been updated, but other recorders are not obliged to update VOB_REC_TIME in MNFI, so VOB_REC_TIME in MNFI remains the old value. In this case, it is clear that the correspondence between the entry point and the VOB has been shifted, so that step S46 becomes Yes and the process moves to step S52. In step S52, the system control unit 132 deletes the thumbnail of the entry point set for the cell before editing and deletes the MNFI.

If VOB_REC_TIMEs match, step S46 becomes No and steps S46 to S47
Move to In step S47, the system control unit 1
32 extracts the offset from the MNFI and adds it to VOB_Start_PTM for the VOB. Thereafter, in step S48, the system control unit 132
Cell_Start_PTM of the cell is read, and collated with VOB_Start_PTM to which the offset has been added. Such collation is performed for the following reason. That is, there is a possibility that editing of the thumbnail and DVD-RAM on which the MNFI is recorded is performed on a cell-by-cell basis by another company's recorder. If the order shifts, Cell_Sta
The rt_PTM does not match the VOB_Start_PTM to which the offset has been added. Therefore, in step S49, by performing the above-described collation, the presence / absence of editing using another company's recorder for the cell is detected. Cell_Start_PTM and VOB_ with offset added
When Start_PTM does not match, the process proceeds to step S52, where the system control unit 132 deletes the thumbnail for the entry point set for the cell before editing and deletes the MNFI. If they match,
In step S50, the tbn_MNG associated with the MNFI EP_order is opened, and the thumbnails contained therein are displayed. When the thumbnail is displayed, a playback operation performed by an operator who has watched the thumbnail is accepted, and the V-recorded on the DVD-RAM based on the accepted playback operation.
Play OB.

As described above, according to the present embodiment, one P
A plurality of thumbnails can be recorded for G and PL, and even if an editing operation is performed on PG and PL at a later date after recording the thumbnail, it is detected that such an editing operation has been performed. Thus, it is possible to prevent a strange display from being performed while a mismatch between the thumbnail and the management information exists.

(Third Embodiment) In a third embodiment, the broadcast guide information distributed in the EPG broadcast service is stored in a DVD-RA.
Regarding improvement when recording in M. {3-28} Configuration of RTRW Management File in Third Embodiment FIG. 28 is a diagram showing the format of the RTRW management file in the third embodiment. FIG. 28 differs from FIG. 7, FIG. 8, FIG. 22, and FIG. 23 shown so far in that details of PGI and TXTDT_MG, which have not been clarified, are clarified. In the figure, “PGI” is a PG_TY indicating a PG type, as indicated by a dashed arrow h14, and
An extension area is included in C_Ns indicating the number of cell information included in the PG, a primary text area (PRM_TXTI) reserved for describing text information corresponding to the PG, and a description of text information corresponding to the PG. If required, it consists of IT_SRPN indicating a pointer to the extension area. In this figure, TXTDT_MG is represented by T
.. #N and an item text area (IT_TXTI) # 1... #N. IT_TXTI # 1 ... # n is
IDCD and text_size as shown by the dashed leader line h16
And Text.

A broken arrow y31 in the figure indicates that IT_TXTI_SRPN included in the PGI is IT_TXTI_SRPN # 1 in TXTDT_MG.
Is indicated. This is IT_TXTI_SRPN # 1
Is reserved for recording text information related to PGI # 1. As described above, it can be understood that two areas for recording text information, the item text area (IT_TXTI) and the primary text area (PRM_TXTI), are secured in the RTRW management file. On the other hand, in the EPG broadcast service, the broadcast guide information to be distributed is also text information, so that the broadcast guide information can be recorded in these item text area (IT_TXTI) and primary text area (PRM_TXTI). Here, the broadcast guide information includes text information indicating a broadcast station, a program genre, program contents, performers, and the like of the program. In the present embodiment, among these, the program title and the broadcast Stations and program genres are recorded in IT_TXTI and PRM_TXTI, and other program contents and text information on performers are recorded in a related information file containing relevant information on PG as shown in the first embodiment. It shall be. This is because the text information about the program contents and the detailed information about the performers has a considerable size, while IT_TXTI and PRM_TXTI are
This is because it is not possible to write all of the broadcast guide information in IT_TXTI and PRM_TXTI because of its size limitation. Therefore, text information related to the program contents created by the broadcasting station that broadcasts the program and that does not need to maintain the same identity is recorded in the PG-related information file.

{3-29a, b, c} Example of description of broadcast guide information FIG. 29A is a diagram showing an example of description when a part of information included in the broadcast guide information is described in PRM_TXTI and IT_TXTI. . In this figure, it can be seen that "Movie Title" is described in PRM_TXTI for PG # 1, and "3" is described in IT_TXTI_SRP. On the other hand, TXTDT_M
In G, # 3 is described in IT_TXTI_SRP, and IDCD = "60", TXT_SIZE "is specified in IT_TXTI indicated by this.
3 "," 4ch ", IDCD =" 30 ", TXT_SIZ" 0 "Here, a description example of the IDCD is shown in Fig. 29B.
Since IDCD = "60" is described as BroadCast Station, it can be seen that this PG was broadcast by a broadcasting station. Following this, IDCD = "30" is described as "Movie", which indicates that the genre of this PG is a movie.

FIG. 29 (c) shows the IT in FIG. 29 (b).
FIG. 41 is a diagram illustrating display contents displayed on the television screen by the DVD-RAM recorder based on descriptions of _TXTI and PRM_TXTI. PRM_TXT
Since the character string "Movie Title" is described in the above, it can be understood that the character string "Movie Title" is displayed on the television screen. IDCD at IT_TXTI "
60 ", followed by the character string" 4ch ", so the three-byte character string" 4ch "is displayed, and the IDCD is set to" 30 ". It can be seen that a film-shaped icon indicating that this PG is a movie is displayed.Below the film-shaped icon,
You can see that the EPG logo is displayed. This is because the program title and broadcasting station name displayed in this way are
Since the broadcast guide information broadcast by the EPG has been acquired from, it indicates that the acquisition source is the EPG.

The above description is based on the I described in the VIDEO RECORDING standard.
Although this is an example of the description contents of T_TXTI and PRM_TXTI (this is not the case with EPG), this embodiment introduces a description rule that describes the same contents in PRM_TXTI and IT_TXTI in addition to these description contents. And PRM_
A description rule is introduced that describes a signature character string "Panasonic" at the beginning of both TXTI and IT_TXTI.

{3-28} Frames w1 and w2 in FIG. 28 are PRM_TXT
Although the description contents of I and IT_TXTI are shown, the description contents of this frame are both "wonder of Panasonic nature" and indicate that they are the same. "Panasonic" is a P
RM_TXTI and IT_TXTI are signature character strings indicating that they have been described by the in-house recorder, and “wonder of nature” is a part of broadcast guide information broadcast by the EPG broadcast service. Writing the signature character string and the broadcast guide information to both PRM_TXTI and IT_TXTI in this way is based on PRM_TXTI, IT_TXTI
If any of _TXTI is rewritten by another company's recorder, this is to detect the presence or absence of such rewriting. Also, placing the signature character string before the broadcast guide information detects whether the broadcast guide information is recorded according to the format prescribed by the company if it is found that there is no rewriting of the recorder of another company That's why.

{3-30} FIG. 30 is a diagram showing an example of description contents of PRM_TXTI and IT_TXTI when PRM_TXTI and IT_TXTI do not match. Frames w3 and w4 in FIG. 30 are PRM_TXT
The description contents of I and IT_TXTI, the description contents of the frame w3 about PRM_TXTI are "Panasonic wonders of nature",
Since the description content of the frame w4 for IT_TXTI is “major league”, it indicates that they do not match. If they do not match, it is considered that the primary text area and the item text area have been tampered with by the user.

{3-18} Subsequently, the DVD-ROM of the third embodiment
The internal configuration of the RAM recorder will be described. The internal configuration of the DVD-RAM recorder according to the third embodiment is not different from the internal configuration of the DVD-RAM recorder shown in the first embodiment. However, in the third embodiment, the primary text area
(PRM_TXTI) and the item text area (IT_TXTI) to record the broadcast guide information.
The system control unit 132 has been improved to perform two modes: program reservation processing and broadcast guide display processing.

{3-18_132-31} FIG. 31 is a flowchart showing the processing procedure of the broadcast guide information display processing. FIG.
In step 1, the system control unit 132 waits for the weekly and daily broadcast guide information to be transmitted from the EPG editing center in step S61. Broadcast guide information is EP
If transmitted from the G editing center, the system control unit 132 receives and stores the broadcast guide information in step S62, and presents the broadcast guide information to the operator in step S63 to display the broadcast program described in the broadcast guide information. The setting of recording reservation is received for. If the recording reservation is set, the process moves from step S63 to step S64,
The system control unit 132 waits for the arrival of the broadcast time of the broadcast program reserved for recording. When the broadcast time of the broadcast program arrives, the process proceeds from step S64 to step S65, in which the encoder unit 134 performs encoding according to the procedure described in the first embodiment, generates a VOB for the broadcast program, and generates a DVD-RAM. To record. At the same time, the VOBI and PGC information for this VOB are recorded on the DVD-RAM. afterwards,
In step S66, a part of the broadcast guide information about the broadcast program (the program name of the broadcast program, the genre of the program, and the name of the broadcast station) is recorded in the primary text area and the item text area.

{3-18_132-32} Processing Procedure of Broadcast Guide Information Display Processing Next, the processing procedure of the broadcast guide information display processing will be described. FIG. 32 is a flowchart illustrating a processing procedure of the broadcast guide information display processing. Steps S70 and S80 determine the conditions for repeating the processing from step S71 to step S79. By these steps, the processing from step S71 to step S73 is performed by PGI # 1 included in ORG_PGCI.・ Repeated for each of #m.

Hereinafter, the processing contents in this loop processing will be described for an arbitrary PGI in PGI # 1... #M. In step S71, the system control unit 13
2 reads the text information of PRM_TXTI included in the PGI. In step S72, the system control unit 132
IT_TXTI_SRPN included in PGI and IT_TXT in TXTDT_MG
Reads the text information of IT_TXTI specified by I_SRPN. In step S73, the system control unit 132
Determines whether the text information read from PRM_TXTI matches the text information read from IT_TXTI.

If the two do not match, there is a possibility that the broadcast guide information recorded in the primary text area and the item text area has been falsified by the user. In step S79, the text information recorded in the IT_TXTI area and the PRM_TXT area is read and displayed as normal text information without displaying the logo.

If they match, the process moves from step S73 to step S74 to read the first character string of the broadcast guide information recorded in the primary text area and the item text area, and read it in step S75. The first character string is DVD-RAM recorder 7
It is determined whether or not the signature character string indicates a maker name of 0. If it is not a signature character string, step S75 is No, so the process proceeds to steps S78 and S79, and the text information recorded in the item text area and the primary text area as normal text information without displaying the EPG logo Is read, but if it is a signature character string, step S75 becomes Yes, and the process moves from step S75 to step S76. In step S76, the EPG logo is displayed on the assumption that the text information recorded in the primary text area and the item text area is broadcast guide information described in a unique format determined by the manufacturer of the DVD-RAM recorder 70. And at step S77, according to the format,
The text information recorded in the primary text area and the item text area is read, and the contents of the text information are displayed on the screen.

As described above, when the text information is displayed, the reproduction operation performed by the operator who has viewed the text information is accepted, and the VOB recorded on the DVD-RAM is reproduced based on the accepted reproduction operation. . As described above, according to the present embodiment, the text information broadcast by the EPG broadcast service is recorded on DVD-RAM, and when the identity of the text information is impaired by another company's recorder, it is detected, EP
Since you can take measures such as not displaying the G logo,
There is no false indication that the EPG logo is erroneously attached to the EPG text information whose identity has been compromised.

Also, the text information to which the signature character string has been added can be read and displayed, believing that it is recorded in the format, and no such signature character string is added. The character string is not recorded in such a format and can be read by another reading method. As described above, whether or not to read text information is switched according to a format determined for recording text information in accordance with the presence or absence of a signature character string. Therefore, text information that does not conform to a predetermined format conforms to such text information. It does not occur that a strange character string is displayed on the screen due to the fact that the character string is read out.

Although the description has been given based on the first to third embodiments, the present invention is merely presented as an example of a system in which the best effect can be expected at present. The present invention can be modified and implemented without departing from the gist thereof. Representative modified embodiments include the following (a), (b), (c),.... (A) DVD-RAM recorder 7 in first to third embodiments
0 indicates a configuration premised on substituting for a conventional stationary home VTR. However, if a DVD-RAM is also used as a recording medium of a computer, the following configuration may be used. . That is, the drive unit 138 is a DVD-RAM
The drive device is connected to a computer bus via an interface conforming to SCSI, IDE, and IEEE1394. Components other than the drive unit 138 in FIG. 3 are realized by executing an OS and application programs on computer hardware.

(B) In the first to third embodiments, it is assumed that a video stream and an audio stream are multiplexed in a VOB, but sub-picture data obtained by run-length-compressing subtitle characters may be multiplexed. Good. Further, video streams constituting still image data may be multiplexed. (C) In the first to third embodiments, all units are described by video frames and audio frames. However, a 3: 2 pulldown used for compressing a video of 24 frames / second like a film material is used. Video stream,
In some cases, 1.5 frames = 1 picture instead of 1 frame = 1 picture. The present invention does not substantially rely on 3: 2 pulldown, and in this case is not limited to the frames described above.

(D) The procedure described with reference to the flowcharts in the first to third embodiments (FIG. 1 in the first embodiment)
9 to 20, FIG. 26 to FIG. 27 in the second embodiment, and FIG. 31 to FIG. 32 in the third embodiment) are realized by a machine language program, which is recorded on a recording medium to be distributed and sold. May be. Such a recording medium includes an IC card, an optical disk, a floppy disk and the like, and the machine language program recorded on these is used by being installed in a general-purpose computer. The general-purpose computer sequentially executes the installed machine language programs to realize the functions of the DVD-RAM recorder described in the present embodiment.

[0133]

As described above, in the optical disk according to the present invention, a plurality of video objects each including moving image data, recording time information indicating the recording time of each video object, and encoding of each video object are included. The display start time information indicating the time at which the display of moving image data should start, and the difference obtained by subtracting the display start time information from the recording time information of the plurality of video objects, based on the relative time with the start time as the reference time. A plurality of program files that record information related to a plurality of video objects having the same value as information on a program constituted by the video objects are recorded, and each program file has a corresponding program file. From the recording time information, the same video object Since the difference value obtained by subtracting the display start time information about is given as the identification information
(1) Regardless of whether the beginning of the video object is deleted or whether the middle of the video object is deleted and the rest is used as a new video object, recording time information,
Focusing on the fact that the same numerical value is added to the two pieces of time information in the display start time information, using the difference between them as the identifier of the file related to this video object, the information related to this video object is used. Since the file is recorded in the file with the identifier, even when the file is edited, the broadcast program corresponding to the video object is uniquely determined, and the information related thereto is uniquely read. Becomes possible.

The optical disc further includes (1) a plurality of pieces of intermediate playback information indicating what content is played when each video object constituting the program is played from a plurality of intermediate positions of the program. Entry point management information including a plurality of combinations of entry point designation information for designating a midway position of the program as an entry point of the program, and a copy of recording time information at the time when the midway reproduction information for the midway position is recorded Is recorded,
If the recording time information of the video object is the same time as a copy of the recording time information included in the entry point management information, it indicates that the correspondence between the plurality of pieces of intermediate playback information and the video object is valid. Therefore, (5) the recording device that has recorded the entry point management information on the optical disc must compare the updated time information with the deletion with the copy of the time information when the entry point management information of the entry point was recorded. Thereby, it is possible to detect whether or not the correspondence between the intermediate reproduction information and the video object is shifted.

By detecting such a shift, partial deletion is performed using a recorder of another company, and when a shift occurs in the correspondence between the entry point and the video object, the intermediate playback information and the entry point management are performed. By deleting the information, it is possible to avoid a strange display. The optical disc is (5) a cell that specifies a plurality of partial sections of the video object constituting the program as a plurality of cells by a plurality of sets of relative time information based on the beginning of each video object constituting the program. Designation information is recorded, the intermediate position is a head position or an end position of a cell indicated by each set of relative time information, and the entry point designation information is used to identify a plurality of entry points from each other. Of the video object, the cell number indicating which of the plurality of cells included in the program contains the location designated by the entry point, and the offset from the beginning of the video object to the intermediate position. The display start time information for the video object includes an offset indicating an intermediate position of the video object. If the sum of the plurality of intermediate playback information and the video object is equal to one of the relative time information included in the cell specification information for the cell included in the entry point specification information, Since the correspondence is legitimate (6), the optical disc on which the entry point management information is recorded is edited in units of cells by a recorder of another company, and cells in the program are deleted or cells are added and entry is performed. Even when the order of the cells to which the points are assigned is shifted, the display start time and the display end time of the cell are determined using the offset from the start of the video object included in the entry point management information to the start position and the end position of the cell. By calculating and comparing this with the set of relative time information described in the cell information that defines the cell,
The presence / absence of editing for such a cell can be detected. If it is clear that editing has been performed on the cell, delete the intermediate playback information set for the cell before editing and the entry point management information,
A strange display can be avoided.

The optical disc further (1) is reserved for a program, and has an area for each program in which text information about the program is recorded, and an extended area for the area for each program. Information
The text information required to maintain the identity is recorded in each of the program-specific area and the extension area, and the program file contains text information on program contents,
Since text information that is not required to maintain the identity is recorded (9), the text information created by the broadcasting station and required to maintain the identity is recorded in the program-specific operator and the extended area, respectively. If any one of these is rewritten by another company's recorder, by comparing the recorded contents of the program-specific operator with the recorded contents of the extended area, the other company's recorder
It can be detected whether the identity of G has been impaired.

When the EPG text information is recorded on an optical disk and the identity of the text information is impaired by a recorder of another company, it can be detected and a measure such as not displaying the EPG logo can be taken. There is no false indication that the EPG logo is erroneously attached to the EPG text information that has been impaired. Here, in the above optical disc (1), a signature character string indicating that the text information has been recorded by a predetermined recording device is recorded in each of the program-specific area and the extension area together with the text information (10). ), The recording device can read the text information to which the signature character string is attached, believing that the text information is recorded in a predetermined format, and is not provided with such a signature character string. The character string is not recorded in such a format and can be read by another reading method. As described above, whether or not to read text information is switched according to a format determined for recording text information in accordance with the presence or absence of a signature character string. Therefore, text information that does not conform to a predetermined format conforms to such text information. It does not occur that a strange character string is displayed on the screen due to the fact that the character string is read out.

[Brief description of the drawings]

FIG. 1 is a diagram showing an appearance of a DVD-RAM disc which is a recordable optical disc according to an embodiment of the present invention.

FIG. 2 is a diagram showing a recording area.

FIG. 3 is a diagram showing a data configuration on a disk identified through a file system.

FIG. 4 is a diagram showing how an AV file is recorded on a volume area in a DVD-RAM.

FIG. 5 is a diagram showing a plurality of picture data arranged in a display order and a plurality of picture data arranged in a coding order.

FIG. 6 is a diagram in which a logical format of a VOB data structure is detailed in a stepwise manner.

FIG. 7 is a diagram in which the contents of the RTRW management file in the embodiment are detailed in a stepwise manner.

FIG. 8 is a diagram showing details of the recording contents of the RTRW management file in the embodiment in a stepwise manner.

FIG. 9A is a diagram showing a 4-byte format indicating VOB_REC_TIME. (B) is a diagram showing a PTM description format.

FIGS. 10A and 10B show a case where an editing operation of deleting a head portion of a VOB is performed, and VOB_REC_TM and VO in the VOBI are deleted.
FIG. 14 is a diagram illustrating how B_Start_PTM is updated.

FIG. 11 shows VOB_Start_PTM and VOB_REC_T included in VOBI
It is a figure showing the correspondence of IME and PG related information file.

FIG. 12: Two cells (Cell # 1, Cell # 2) and two Vs
FIG. 9 is a diagram showing a PG # 1 composed of OBs (VOB # 1, VOB # 2).

13A and 13B are diagrams showing how a PG_ID is set for a newly generated VOB when a middle part of the VOB is deleted.

FIG. 14 is a diagram showing how a PG_ID corresponding to a new VOB obtained by deleting a middle part of VOB # 1 is calculated.

FIG. 15 is a diagram illustrating how a PG_ID is calculated for a VOB belonging to a completely different PG, with reference to FIG.

FIGS. 16A and 16B are diagrams illustrating a case where VOBs included in two PGs are divided by an editing operation;
It is a figure which shows how G_ID is set.

FIG. 17 is a diagram illustrating a configuration example of a system using a DVD-RAM recorder according to the present embodiment.

FIG. 18 is a block diagram of a DVD-RAM recorder 70.

FIG. 19 is a flowchart showing processing contents of a system control unit 132;

FIG. 20 is a diagram showing a flowchart of a PG list display process performed when a DVD-RAM in which PG related information is recorded is loaded.

FIG. 21 is a diagram showing an example of an interactive screen displayed in step S85.

FIG. 22 is a diagram in which the contents of the RTRW management file in the second embodiment are detailed in a stepwise manner.

FIG. 23 is a diagram in which the contents of the RTRW management file in the second embodiment are detailed in a stepwise manner.

FIG. 24 is a diagram illustrating the correspondence between tbn_MNG and thumbnails created for PL.

FIG. 25 is a diagram showing the correspondence between tbn_MNG and thumbnails created for the PG.

FIG. 26 is a flowchart showing processing contents of a system control unit 132 in a thumbnail setting mode.

FIG. 27 is a flowchart showing processing contents of a system control unit 132 in an entry point verify mode.

FIG. 28 is a diagram showing a format of an RTRW management file according to the third embodiment.

29A and 29B are diagrams illustrating a description example in a case where a part of information included in broadcast guide information is described in PRM_TXTI and IT_TXTI. (C) FIG. 30 is a diagram illustrating display content displayed on the television screen by the DVD-RAM recorder based on the description of IT_TXTI and PRM_TXTI in FIG. 29 (b).

FIG. 30: PRM when PRM_TXTI and IT_TXTI do not match
It is a figure which shows an example of the description content of _TXTI and IT_TXTI.

FIG. 31 is a flowchart showing a processing procedure of broadcast guide information display processing.

FIG. 32 is a flowchart illustrating a processing procedure of broadcast guide information display processing.

33 (a) and (b) are diagrams assuming how a VOB partial section is designated when a VOB is partially deleted.

FIG. 34A shows VOB # 1 before and after a part to be partially deleted.
FIG. 11 is a diagram illustrating a state where the VOB is divided into three VOBs (new), VOB # 2 (new), and VOB # 3 (new). (B) is a diagram showing a state in which, after dividing a VOB and a cell, only the leading portion of VOB # 1 included in PG # 1 is partially deleted.

FIG. 35 is a diagram assuming a case where a file containing related information on broadcast programs A and B is recorded on a DVD-RAM.

FIG. 36 (a) is a diagram in which PGs, VOBs, cells, and file names of files containing related information are associated with each other. (B) is a diagram showing an example of the contents of a correspondence table after editing.

[Explanation of symbols]

 131 User interface unit 132 System control unit 133 Input unit 134 Encoder unit 135 Output unit 136 Decoder unit 137 Track buffer 138 Drive unit 139 Time management unit

Continued on the front page F term (reference) 5B022 AA00 BA00 CA04 5D077 AA30 CA02 DC03 DC11 DC22 EA33 EA34 5D110 AA17 CA05 CC03 CD26 CJ04 CJ14 DA01 DA11 DA17 DE02 DE04 DE06

Claims (40)

[Claims] 1. A system comprising: a plurality of video objects each including moving image data; recording time information indicating a recording time of each video object; and a relative time with reference to a time when encoding of each video object is started. Display start time information indicating a time at which display of moving image data is to be started, and information related to a plurality of video objects of which the difference value obtained by subtracting the display start time information from the recording time information is the same value among the plurality of video objects Are recorded as information about the program constituted by the video objects, and each program file contains the same information from the recording time information of the video objects constituting the corresponding program. Difference obtained by subtracting the display start time information for the video object Optical disc but which is characterized in that it is provided as the identification information. 2. The plurality of video objects include a video object whose head portion is partially deleted, and recording time information and display start time information of the partially deleted video object have a length corresponding to the deletion length. 2. The optical disc according to claim 1, wherein a corresponding relative time is added. 3. The plurality of video objects include a video object newly generated due to deletion of an intermediate part of a preceding video object, and recording time information and display start time of the video object. 3. The optical disk according to claim 1, wherein the information includes a relative time corresponding to a sum of a data length of a preceding video object and a deletion length thereof. 4. The recording time information indicates a combination of any one of year, month, day, hour, minute, and second at which the video object was recorded, and the display start time information is a reference in a playback device. Based on the frequency of occurrence of the clock pulse, indicates the first display start timing of the moving image data included in the video object, the identification information, the quotient when the display start time divided by seconds from the recording time information 4. The optical disk according to claim 1, wherein the value is a value obtained by subtracting the value. 5. The optical disc further comprises: a plurality of intermediate playback information indicating what content is to be played when each video object forming the program is played from a plurality of intermediate positions of the program. Entry point management information including a plurality of sets of entry point designation information for designating a midway position of the program as an entry point of the program, and a copy of recording time information at the time when the midway reproduction information for the midway position is recorded. Recorded, and the recording time information on the video object is the same time as a copy of the recording time information included in the entry point management information;
2. The optical disc according to claim 1, wherein the optical disc indicates that the correspondence with the video object is valid. 6. The optical disc includes a plurality of sub-intervals of a video object constituting the program as a plurality of cells by a plurality of sets of relative time information based on the head of each video object constituting the program. Cell designation information to be designated is recorded, the intermediate position is a head position or an end position of a cell designated by each set of relative time information, and the entry point designation information is a plurality of entry points. An entry number for identification, a cell number indicating which of the plurality of cells included in the program has a location designated by the entry point, and a cell number from the head of the video object to the intermediate position. And an offset, and the display start time information of the video object is an intermediate position of the video object. If the sum of the offset and the self is equal to any one of the relative time information included in the cell designation information for the cell included in the entry point designation information, 6. The optical disc according to claim 5, wherein the optical disc indicates that the correspondence with the object is valid. 7. The optical disc has cell designation information for designating, as a cell, a partial section of the video object constituting the program, based on a set of relative time information based on the head of the video object constituting the program. The intermediate position is a head position or an end position of a cell specified by each set of relative time information, and the entry point designation information includes: an entry number for identifying a plurality of entry points; Among a plurality of programs specified by the specification information, a program number indicating which program has an entry point added thereto, and a program number indicating which of the plurality of cells included in the program to which the entry point has been added. A cell number indicating whether or not the location specified by the entry point exists; The display start time information for the video object is included in the cell designation information of the cell whose entry point designation information includes the sum of the offset indicating the midway position of the video object and the entry itself. 6. The optical disc according to claim 5, wherein when the relative time information is the same as the relative time information, the correspondence between the plurality of pieces of intermediate reproduction information and the video object is valid. 8. The method according to claim 6, wherein the cell number indicates the order of the cells on the optical disc or the order of the cells in one program, and the entry number indicates the order of the entry points in the cell. optical disk. 9. The optical disc further includes a program-specific area reserved for a program, in which text information about the program is recorded, and an extended area for the program-specific area. The text information required to maintain the identity is recorded in each of the program-specific area and the extension area, and the program file is text information relating to the program contents, and the maintenance of the identity is required. 2. The optical disc according to claim 1, wherein the optical disc contains text information that is not to be read. 10. A signature character string indicating that the text information has been recorded by a predetermined recording device is recorded in each of the program-specific area and the extension area together with the text information. 10. The optical disk according to claim 9, wherein a signature character string is not recorded in the information. 11. A recording apparatus for an optical disk, comprising: a clock means for measuring a current time; a receiving means for receiving a recording instruction for an input signal including a video signal input from outside the apparatus; and receiving a recording instruction. Encoding means for encoding an input signal containing a video signal to obtain a video object containing moving image data; and, when encoding by the encoding means is started, the relative time with respect to the time when the encoding was started as a reference time. First generating means for generating display start time information indicating a time at which display of moving image data included in the video object is to be started, and first recording for recording the video object on an optical disc when the video object is obtained. Means, when the video object is recorded on the optical disc, At the time when the object is recorded, the recording time measured by the clock means is recorded as recording time information on the optical disc in association with the video object, and the generated display start time information is recorded on the optical disc in association with the video object. When the recording of the video object, the recording time information and the display start time information is recorded on a plurality of optical discs, the recording by the second recording means for recording and the first and second recording means is repeated. Calculating means for calculating a difference value obtained by subtracting the display start time information for the same video object from the recording time information for each of them; and information relating to a plurality of video objects having the same calculated difference value. As information about the program composed of objects Third recording means for recording a plurality of recorded program files on an optical disc; and providing means for providing a difference value obtained by subtracting display start time information from recording time information to the plurality of program files as identification information. A recording device, comprising: 12. A recording apparatus comprising: a deletion unit for partially deleting a plurality of video objects; and a plurality of recording time information and display start time information when a head portion of the plurality of video objects is deleted by the deletion unit. 12. The recording apparatus according to claim 11, further comprising: adding means for adding a relative time corresponding to a deletion length to an object associated with the partially deleted video object. 13. The recording apparatus according to claim 1, wherein, when a part of the video object is deleted by the deletion unit, a second generation unit that generates a portion after the deleted portion as a new video object; When recorded as an object, of the recorded recording time information and the display start time information, the one for the video object that has been partially deleted is extracted and the video object preceding the recording time information and the display start time information is retrieved. A setting means for setting a recording time information and a display start time information of a new video object by adding a relative time corresponding to a sum of a data length and a deletion length thereof. 13. The recording device according to 11 or 12. 14. The time measuring means according to claim 1, wherein said current year, month, day,
The time is indicated by using a combination of hours, minutes, and seconds, and the recorded time information includes the year,
The display start time information indicates a combination of any one of month, day, hour, minute, and second. The display start time information indicates the frequency of generation of the reference clock pulse in the playback device. The timing is shown, and the calculating means calculates a difference value by subtracting a quotient obtained by dividing display start time information by second from recording time information. The recording device according to any one of the above. 15. The reproducing apparatus for an optical disk according to claim 1, wherein a first cell specified as a reproduction unit is received from an operator.
Receiving means; first specifying means for receiving a designation of a cell when the first receiving means receives the cell; and recording time information for the specified video object when the video object is specified. Reading means for reading the display start time information from the optical disk; and calculating a difference value obtained by subtracting the read display time start time information from the read recording time information, thereby obtaining a program including the video object. Calculating means for calculating the identification information of the program, reading a program file containing the calculated identification information from the optical disc, and displaying means for displaying the contents of the program file and a video object constituting the program containing the calculated identification information in order. A reproducing apparatus, comprising: reproducing means for reproducing. 16. The reproducing apparatus further comprises: a second receiving unit that receives a program designation from an operator; and a second specifying unit that, when receiving a program designation from the operator, identifies identification information about the program. When the identification information is specified, the reading unit sequentially reads the recording time information and the display start time information for the plurality of video objects recorded on the optical disc from the optical disc, and the calculating unit reads the By calculating a difference value obtained by subtracting the read display time start time information from the recording time information, the identification information of the program including the video object is calculated, and the reproducing unit calculates the video information recorded on the optical disc. Among the objects, those whose difference value calculated by the calculating means matches the identification information of the program specified by the specifying means are determined. And,
16. The reproducing apparatus according to claim 15, wherein the determined video object is recognized and reproduced as a video object constituting the program. 17. A recording apparatus for recording other information on an optical disk on which a video object including a plurality of moving image data and recording time information indicating a recording time when each video object is recorded, is provided. Playback means for playing back a program composed of video objects recorded in a program, reception means for receiving an instruction from an operator while the program is being played back, and playback at the time when the instruction from the operator is given. A first generating means for generating a plurality of intermediate playback information indicating what content is to be reproduced when a video object constituting the program is reproduced from a plurality of intermediate positions of the program based on the content; First recording means for recording the generated midway reproduction information on an optical disc; and setting the midway position of the program to an entry point of the program. Second generation means for generating entry point designation information to be designated by specifying, and, when the halfway playback information is generated, reading means for reading recording time information at the time when the halfway playback information for the halfway position is recorded; 2. A recording apparatus, comprising: a second recording unit that records entry point management information including a set of entry point information generated by a generation unit and a copy of read recording time information on an optical disc. 18. The optical disc further includes cell designation information for designating a partial section of the video object constituting the program as a cell by a set of relative time information based on the head of the video object constituting the program. The intermediate position is a head position or an end position of a cell, and the second generating means includes: an entry number for identifying a plurality of entry points from each other; A generation unit that generates entry point designation information including a cell number indicating in which cell the location designated by the entry point exists, and an offset at the intermediate position from the beginning of the video object, The second recording means includes: an entry number generated by the generation unit; a cell number;
18. The recording apparatus according to claim 17, wherein entry point management information including a combination of entry point information including an offset and a copy of the read recording time information is recorded on an optical disc. 19. The optical disc further stores cell designation information for designating a partial section of the video object as a program including a plurality of cells, and wherein the second generation means identifies the plurality of entry points from each other. Number, a program number indicating to which of the plurality of programs specified by the specification information the entry point is assigned, and a plurality of cells included in the program to which the entry point is assigned. A generation unit configured to generate a cell number indicating which cell has a location designated by the entry point, and an offset from the start of the video object to a start position and an end position of the cell; Recording means, a program number generated by the generation unit, a cell number,
18. The recording apparatus according to claim 17, wherein entry point management information including a combination of entry point information including an offset and a copy of the read recording time information is recorded on an optical disc. 20. A reproducing apparatus for an optical disk according to claim 5, wherein: first reading means for reading the recording time information from the optical disk; and reading a copy of the recording time information at the time when the entry point management information is recorded. 2 reading means; recording time information read by the first reading means;
A first determining unit that determines whether or not the video object has been edited by comparing the copy of the recording time information read by the reading unit; and a first determining unit that determines that there is no editing,
Display means for reading and displaying the intermediate reproduction information on the optical disc; receiving means for accepting a reproduction operation performed by an operator who has watched the intermediate reproduction information; and displaying the intermediate reproduction information on the optical disc based on the received reproduction operation. A reproducing apparatus, comprising: reproducing means for reproducing a recorded video object. 21. The optical disc includes a plurality of sub-intervals of a video object constituting the program as a plurality of cells by a plurality of sets of relative time information based on the head of each video object constituting the program. Cell designation information to be designated is recorded, the intermediate position is a head position or an end position of a cell designated by each set of relative time information, and the entry point designation information is a plurality of entry points. An entry number for identification, a cell number indicating which of the plurality of cells included in the program has a location designated by the entry point, and a cell number from the head of the video object to the intermediate position. The playback device, when the first determination unit determines that there is no editing,
Third reading means for reading entry point designation information, fourth reading means for reading display information on the video object, and cell designation information; display start time information read by the fourth reading means;
An adding means for obtaining a time obtained by adding an offset included in the entry point designation information read by the third reading means; a time obtained by the addition by the adding means; and a cell designation information read by the fourth reading means. A second determining unit that determines whether or not the cell has been edited by comparing the relative time information contained in the second time information with the cell. The display unit determines that there is no editing by the first determining unit.
21. The reproducing apparatus according to claim 20, wherein the intermediate reproduction information on the optical disk is read out and displayed only when it is judged by the judging means that there is no editing. 22. A recording apparatus for an optical disk having a program-specific area in which text information about a program is recorded and an extension area for the program-specific area, wherein the broadcast program content and the program are broadcast. When broadcast guide information including text information indicating a broadcast time is transmitted by a broadcast station, an acquisition unit that acquires the broadcast guide information, and a reception unit that accepts a program reservation operation based on the acquired broadcast guide information from an operator. And a timer means for measuring the current time. When a program reservation operation is accepted, the current time measured by the timer means waits until the broadcast time indicated in the broadcast guide information is reached. Encoding means for obtaining a video object by encoding a broadcast signal including a video signal input from outside; The Deo object, the recording on the optical disc as a video object constituting the program 1
When the video object for the program is recorded on the optical disc by the recording means and the first recording means, the text information included in the broadcast guide information is created in the same manner as the broadcast station, and the text information is identical. A recording device, comprising: a second recording unit that records, in a program-specific area and an extended area, information required to be maintained. 23. The recording apparatus according to claim 22, wherein the second recording means records text information in each of the program-specific area and the extension area together with a signature character string indicating that the description is made by a predetermined recording device. Recording device. 24. The reproducing apparatus for an optical disk according to claim 9, wherein: reading means for reading text information required to maintain the same from each of the program-specific area and the extension area; First determining means for determining whether the text information has been tampered with by comparing the text information read from each of the areas; and determining that the text information has not been tampered, Display means for displaying the text information according to the format, reception means for receiving a reproduction operation performed by an operator who has viewed the text information, and video objects recorded on the optical disc based on the received reproduction operation. And a reproducing means for reproducing the data. 25. The playback device further determines whether the text information read from each of the program-specific area and the extension area includes a signature character string indicating that the text information is described by a predetermined recording device. A second determination unit, wherein the display unit determines that the text information has not been tampered with by the first determination unit, and if the second determination unit determines that the signature character string is included, The reproducing apparatus according to claim 24, wherein the information is displayed according to a predetermined format. 26. A recording medium in which a program for causing a computer to perform a recording process on an optical disk is recorded in a computer-readable format, and a recording instruction for an input signal including a video signal input from outside the apparatus is provided. Receiving a recording instruction, encoding the input signal,
An encoding step of obtaining a video object including moving image data; and, when encoding is performed by the encoding step, display of moving image data included in the video object is started at a relative time with respect to a point in time when the encoding is started. A first generation step of generating display start time information indicating a time to be performed, a first recording step of recording the video object on the optical disc when the video object is obtained, and a first recording step of recording the video object on the optical disc. A second recording step of recording the recording time of the video object as recording time information on the optical disc in association with the video object and recording the generated display start time information on the optical disc in association with the video object; 1. Second record When a set of a video object, recording time information, and display start time information is recorded on a plurality of optical discs, a repetition step of repeatedly performing the recording by the step and a recording by the first and second recording steps are repeated. From the recording time information for each of the multiple video objects,
A calculating step of calculating a difference value obtained by subtracting display start time information for the same video object; and information relating to a plurality of video objects having the same calculated difference value, for a program constituted by the video objects. A third recording step of recording a plurality of program files recorded as information on an optical disc; and an assigning step of assigning, as identification information, a difference value obtained by subtracting display start time information from recording time information to the plurality of program files. A computer-readable recording medium characterized by recording a program for causing a computer to perform the following procedure. 27. A recording medium in which a program for causing a computer to perform a reproduction process of an optical disk according to claim 1 is recorded in a computer-readable format, wherein a designation of a cell as a reproduction unit is received from an operator. 1
A receiving step; a first receiving step receiving a designation of a cell; a first specifying step of specifying a video object corresponding to the cell; and, when the video object is specified, recording time information on the specified video object. A reading step of reading the display start time information from the optical disc; and calculating a difference value obtained by subtracting the read display time start time information from the read recording time information, thereby obtaining a program including the video object. Calculating the identification information of the program file, reading the program file containing the calculated identification information from the optical disc, displaying the contents of the program file, and sequentially displaying the video objects constituting the program containing the calculated identification information. Let the computer perform a procedure consisting of a playback step to play A computer-readable recording medium on which a program is recorded. 28. The program recorded on the recording medium, further comprising: a second accepting step of accepting a program designation from an operator; and receiving a program designation from the operator; And specifying the identification information, the reading step sequentially reads, from the optical disc, recording time information and display start time information for a plurality of video objects recorded on the optical disc; Calculating a difference value obtained by subtracting the read display time start time information from the read recording time information, thereby calculating identification information of a program including the video object; Among the video objects recorded on the optical disk, the difference value calculated in the calculation step is a specific value. 28. A computer-readable computer according to claim 27, wherein the video object that matches the identification information of the program specified by the program is determined, and the determined video object is recognized and reproduced as a video object constituting the program. Recording medium. 29. A computer-readable program for causing a computer to perform an information recording process on an optical disk on which a video object including a plurality of moving image data and recording time information indicating a recording time when each video object is recorded is recorded. A reproducing step of reproducing a program composed of a video object recorded on an optical disc in a recording medium recorded in a possible format, and receiving an instruction from an operator during the reproduction of the program What content is reproduced when a video object constituting the program is reproduced from a plurality of intermediate positions of the program based on the content of the reproduction at the time of the receiving step and the instruction from the operator. A first generating step of generating a plurality of intermediate playback information indicating whether A first recording step of recording medium reproduction information on an optical disc; a second generation step of generating entry point designation information for designating a midway position of the program as an entry point of the program; An entry including a combination of a reading step of reading recording time information at a point in time when the intermediate reproduction information for the intermediate position is recorded, entry point information generated by the second generation step, and a copy of the read recording time information 2nd recording of point management information on optical disc
A computer-readable recording medium on which a program for causing a computer to perform a procedure including a recording step is recorded. 30. A recording medium which records a program for causing a computer to reproduce the optical disk according to claim 5 in a computer-readable format, comprising: a first reading step of reading recording time information from the optical disk; A second reading step for reading a copy of the recording time information at the time when the management information is recorded, a recording time information read in the first reading step,
A first determining step of determining whether or not the video object has been edited by collating the copy of the recording time information read in the second reading step; And a receiving step of receiving a playback operation performed by an operator who has watched the intermediate playback information, and a video object recorded on an optical disc based on the received playback operation. A computer-readable recording medium characterized by recording a program for causing a computer to perform a procedure including a reproducing step of reproducing a program. 31. A program for causing a computer to perform an information recording process on an optical disk having a program-specific area in which text information about a program is recorded and an extension area for the program-specific area, is recorded in a computer-readable format. An acquisition step of acquiring the broadcast guide information if the broadcast station transmits the broadcast guide information including text information indicating a broadcast program content and a broadcast time at which the program is broadcast; A receiving step of receiving a program reservation operation from the operator based on the acquired broadcast guide information; and, when receiving the program reservation operation, waits for the current time to become the broadcast time indicated in the broadcast guide information, and the broadcast time comes. Then, a broadcast signal including a video signal input from the outside of the device is encoded and a video object is encoded. Encoding step; and recording the encoded video object on the optical disc as a video object constituting a program.
If the video object of the program is recorded on the optical disc in the recording step and the first recording step, the text information included in the broadcast guide information is created in a manner similar to the broadcast station, and the text information is identical. A computer-readable recording medium on which is recorded a program for causing a computer to perform a procedure including a second recording step of recording what is required to be maintained in each of the program-specific area and the extended area. 32. The second recording step, wherein text information is recorded in each of the program-specific area and the extension area together with a signature character string indicating that it has been described by a predetermined recording device. The computer-readable recording medium according to the above. 33. A recording medium in which a program for causing a computer to perform a reproduction process on the optical disc according to claim 9 is recorded in a computer-readable format, wherein text information required to maintain identity is stored in a program. A reading step of reading from each of the separate area and the extended area; and a first determining step of determining whether the text information has been tampered with by comparing the text information read from each of the program-specific area and the extended area with text information. If it is determined that tampering has not been performed, a display step of displaying text information according to a predetermined format and a reception step of receiving a reproduction operation performed by an operator who has viewed the text information when the text information is displayed, Based on the received playback operation, the video object recorded on the optical disc is A computer-readable recording medium on which a program for causing a computer to perform a procedure including a reproducing step of reproducing an object is recorded. 34. The program on the computer-readable recording medium further includes a signature character string indicating that the text information read from each of the program-specific area and the extension area is described by a predetermined recording device. A second determining step of determining whether the text information has been falsified by the first determining step, and determining that the text information contains a signature character string by the second determining step. 4. When determined, text information is displayed according to a predetermined format.
3. The computer-readable recording medium according to 3. 35. A plurality of video objects each including moving image data, recording time information indicating a recording time of each video object, and a relative time with respect to a time when encoding of each video object is started as a reference time. Display start time information indicating a time to start displaying moving image data; and what contents are reproduced when each video object constituting the program is reproduced from a plurality of intermediate positions of the program. A combination of a plurality of pieces of intermediate playback information indicating the program, entry point designation information for designating an intermediate position of the program as an entry point of the program, and a copy of recording time information at the time when the intermediate playback information for the intermediate position is recorded. An optical disc characterized by recording entry point management information including a plurality of pieces of information. 36. The optical disc, according to a plurality of sets of relative time information based on the head of each video object constituting the program, dividing a plurality of partial sections of the video object constituting the program into a plurality of cells. Cell designation information to be designated is recorded, the intermediate position is a head position or an end position of a cell designated by each set of relative time information, and the entry point designation information is a plurality of entry points. An entry number for identification, a cell number indicating which of the plurality of cells included in the program has a location designated by the entry point, and a cell number from the head of the video object to the intermediate position. The display start time information for the video object, If the sum of the offset indicating the location and the self is the same as any one of the relative time information included in the cell specification information for the cell included in the entry point specification information, 36. The optical disc according to claim 35, wherein the optical disc indicates that the correspondence with the video object is valid. 37. The optical disc has cell designation information for designating a partial section of the video object constituting the program as a cell, based on a set of relative time information based on the head of the video object constituting the program. The intermediate position is a head position or an end position of a cell specified by each set of relative time information, and the entry point designation information includes: an entry number for identifying a plurality of entry points; Among a plurality of programs specified by the specification information, a program number indicating which program has an entry point added thereto, and a program number indicating which of the plurality of cells included in the program to which the entry point has been added. A cell number indicating whether the location specified by the entry point exists, and The display start time information for the video object includes an offset indicating the middle position of the video object and the sum of itself and the cell designation information for the cell included in the entry point designation information. 36. The optical disc according to claim 35, wherein when the information is the same as the relative time information included, the correspondence between the plurality of pieces of intermediate playback information and the video object is valid. 38. The method according to claim 36, wherein the cell number indicates the order of a cell on an optical disc or the order of a cell in one program, and the entry number indicates the order of an entry point in a cell. optical disk. 39. An optical disc, which is reserved for a program and has a program-specific area in which text information about the program is recorded and an extended area for the program-specific area, wherein each of the plurality of optical discs includes moving image data. When a video object and a plurality of video objects constitute a broadcast program, text information relating to the content of the broadcast program, which is required to maintain the same identity, is written in both the program-specific area and the extended area. An optical disc characterized by being recorded on a disc. 40. A signature character string indicating that the text information has been recorded by a predetermined recording device, together with the text information, in each of the program-specific area and the extension area. An optical disc as described.