JP4077180B2 - Format conversion apparatus and format conversion method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a format conversion apparatus and a format conversion method for converting a data stream of an RTR (Real Time Recording) format into a data format of a DVD (Digital Versatile Disk) video format and recording the data stream on a recording medium.
[0002]
[Prior art]
As is well known, a data stream recorded on a writable optical disk in a recording system based on the current RTR format is recorded on a DVD video format recorded on an optical disk writable in the MPEG (Moving Picture Image Coding Experts Group) 2 system. Is not necessarily compatible with the data stream.
[0003]
In particular, when a data stream recorded in the RTR format is converted into a DVD video format and recorded on a recording medium, only the management information is created for the DVD video format and only the data stream is copied. The video format may not be met.
[0004]
For this reason, at present, an optical disc on which a data stream is recorded in the RTR format by a DVD recording / playback apparatus for only RTR format recording is played back on a DVD video player dedicated to playback of the data stream in the DVD video format. The problem of not being able to do so has arisen.
[0005]
[Problems to be solved by the invention]
Therefore, the present invention has been made in consideration of the above circumstances, and it is possible to easily convert an RTR format data stream into a DVD video format data stream for recording on a DVD video player. An object of the present invention is to provide a very good format conversion apparatus and format conversion method that can be used.
[0006]
[Means for Solving the Problems]
  The format conversion device according to the present invention provides:RTR format data streamDIt is intended for conversion to a VD video format data format. AndFor an RTR format data stream, PCI packet information and DSI packet information generated based on the information of the RDI pack and the management information of the RDI pack existing in the first pack of the first video object unit of the video object Rewriting means for rewriting the data, and setting means for setting the SCR value described in the pack header of the RDI pack existing in the first pack of the first video object unit of the video object constituting the data stream of the RTR format as an offset value For the RTR format data stream, the SCR value is read from the pack header of the pack constituting the video object unit of the video object, and set by the setting means from the read SCR value. The first control means for notifying the MPU unit that controls the format conversion process when the read SCR value is smaller than the offset value, by subtracting the offset value and writing back to the read SCR position; For a data stream in RTR format, PTS_DTS_ in the packet header of the pack constituting the video object unit of the video object flag Is subtracted from the offset value set by the setting means from the PTS data or DTS data indicated by, and written back to the position of the PTS data or DTS data. flag The second control means for notifying the MPU unit that controls the format conversion process when the PTS data or the DTS data indicated by is smaller than the offset valueAre provided.
[0007]
  The format conversion method according to the present invention is as follows:RTR format data streamDThe present invention is directed to a method of converting to a VD video format data format. AndFor an RTR format data stream, PCI packet information and DSI packet information generated based on the information of the RDI pack and the management information of the RDI pack existing in the first pack of the first video object unit of the video object A rewriting step of rewriting to the RTR format data stream, and a setting step of setting the SCR value described in the pack header of the RDI pack existing in the first pack of the first video object unit of the video object constituting the data stream of the RTR format as an offset value For an RTR format data stream, the SCR value is read from the pack header of the pack constituting the video object unit of the video object, and set in the setting step from the read SCR value. A first control step of notifying the MPU unit that controls the format conversion processing when the read SCR value is smaller than the offset value, by subtracting the offset value and writing back to the read SCR position; For a data stream in RTR format, PTS_DTS_ in the packet header of the pack constituting the video object unit of the video object flag Is subtracted from the offset value set in the setting step from the PTS data or DTS data indicated by, and is written back to the position of the PTS data or DTS data. flag The second control step of notifying the MPU unit that controls the format conversion process when the PTS data or the DTS data indicated by is smaller than the offset valueAre provided.
[0008]
  According to the above configuration and method,RThe TR format data stream can be easily converted into a DVD video format data stream and recorded, and can be reproduced by a DVD video player.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, a file system corresponding to RTR-DVD will be briefly described. Here, at least the first unit capable of continuous processing of AV (Audio Video) data is defined so that continuous playback is possible even when a defect or jump occurs during real-time recording. Contiguous Data Area).
[0010]
The CDA is physically a unit that is logically contiguous over the CDA, although a defect area and other data are recognized in the middle of the CDA on the optical disk. The limitation on the CDA block is that the CDA length is logically a fixed length, and the length is a positive multiple of an error correction code (ECC) block.
[0011]
In RTR-DVD, recording / playback processing using this CDA is defined. Further, GOP (Group Of Picture) can be considered as a minimum unit for enabling random access of MPEG video data. In the RTR-DVD, this GOP is closed, and each GOP can be processed independently.
[0012]
In DVD-video, data is stored in a normal file format. Further, the title corresponds to, for example, one movie, and a plurality of titles are recorded on one optical disk. A collection of the titles is called a title set, and the title set is composed of a plurality of files.
[0013]
FIG. 1 shows an overall block configuration of a recording / reproducing apparatus described in this embodiment, and FIG. 2 shows a directory structure of an optical disc on which information is recorded by this recording / reproducing apparatus.
[0014]
In FIG. 2, a “real-time recording movie video (VR_MOVIE.VRO)” file provided as one moving image data file on one optical disk and a VR_AUDIO.VD file provided as a still image after-recording audio data file. There is a VRO file and a “real-time recording still picture video (VR_STILL.VRO)” file provided as a still image data file, and a management information file (video manager VMG file) for managing this video data file. “VR_MANGR.IFO” is provided.
[0015]
In the entire DVD, there is a directory for each standard. The DVD-video has a video title set (VIDEO_TS), the DVD-audio has an audio title set (AUDIO_TS), and the recording / playback DVD has a real-time recording video (DVD_RTAV). Each recording data exists in this directory.
[0016]
In DVD-video, a file called a video manager (hereinafter referred to as VMG) exists as information for managing this optical disk in one optical disk.
[0017]
Further, the video title set (hereinafter referred to as VTS) includes a video title set information (hereinafter referred to as VTSI) file which is information for managing the video title set, a video file composed of video data, VTSI backup files are included.
[0018]
Further, in the recording / playback standard (hereinafter referred to as RTR standard), a VMG is configured by combining video manager information (hereinafter referred to as VMGI), which is information for managing the video manager, and the VTSI. Manage data files.
[0019]
The video files are managed in a hierarchical structure, and one video object set (VOBS) is composed of a plurality of VOBs. In the RTR standard, one VOB is composed of one cell, and DVD video In the standard, one VOB is composed of a plurality of cells, and in both standards, one VOB is composed of a plurality of video object units (hereinafter referred to as VOBU).
[0020]
A VOBU is composed of a pack composed of a plurality of various types of data. One pack is composed of one or more packets and a pack header, and each video data and audio data is recorded in this packet.
[0021]
In the DVD video standard, the time stamp SCR (System Clock Reference) of the pack arranged at the head of this VOB must be set to “0”. This is not the case in the RTR standard.
[0022]
In the case of still image data, 1 picture = 1 VOBU = 1 VOB is managed, and the video data pack (V pack) column is followed by the sub-picture pack (SP pack) column and the audio pack (A pack) column. However, in the case of still image data, SP data and audio data are optional and may be absent. Here, a pack is a minimum unit for performing data transfer processing.
[0023]
Further, the minimum unit for logical processing is a cell unit, and logical processing is performed in this unit. The order in which data is reproduced is defined by PGC (Program Chain). A plurality of PGs (Programs) are registered in this PGC, and cells are registered in this PG.
[0024]
The program chain information (PGCI) actually records the structure of the PGC. The reproduction process is performed according to this PGCI, and the PGCI is created at the time of recording or editing.
[0025]
In the RTR standard, a special PGC for reproduction in the recording order is referred to as an original PGC, and information on the original PGC is recorded in an original program chain information (ORG_PGCI) file.
[0026]
Next, packs constituting the VOBU will be described. As packs common to the DVD video standard and the RTR standard, there are a video pack (V_PCK), an audio pack (A_PCK), and a sub-picture pack (SP_PCK). In addition, in the DVD video standard, a navigation pack (NV_PCK) and an RTR standard are included. There is an RDI (Real Time Data Information) pack (RDI_PCK).
[0027]
The type of pack can be determined by the stream_id and sub_stream_id recorded in each packet header. The pack structure is composed of a pack header and one or more packets. The pack length is 2048 bytes, and is recorded in one logical block. Each pack has a pack header, and its configuration is as shown in FIG. As shown in FIG. 3, SCR information is recorded in the pack header.
[0028]
As shown in FIG. 4, the navigation pack (NV_PCK) includes a pack header, a system header, a PCI packet (PCI_PKT), and a DSI packet (DSI_PKT). This navigation pack (NV_PCK) must be arranged as the first pack of VOBU.
[0029]
As shown in FIGS. 5 and 6, the video pack (V_PCK) includes a pack header and a video packet (V_PKT). When the video pack (V_PCK) is the first pack in the VOBU, as shown in FIG. 5, a system header is added after the pack header, and other video packs (V_PCK) are shown in FIG. It is configured.
[0030]
The audio pack (A_PCK) is composed of a pack header and an audio packet (A_PKT), as shown in FIGS. 7, 8, 9 and 10A, 10B. The audio pack (A_PCK) has a different data structure in the pack depending on the type of sound, but PTS (Presentation Time Stamp) is described in each packet header.
[0031]
As shown in FIG. 11, the sub-picture pack (SP_PCK) includes a pack header and a sub-picture packet (SP_PKT). PTS is described in the sub-picture packet (SP_PKT).
[0032]
As shown in FIG. 12, the RDI pack (RDI_PCK) includes a pack header and an RDI packet (RDI_PKT).
[0033]
Next, returning to FIG. 1, the configuration of the recording / reproducing apparatus will be described. As shown in FIG. 1, a main microprocessor (hereinafter referred to as MPU) unit 100 controls the entire block and is connected to each unit.
[0034]
First, the display unit 120 and the key input unit 130 are connected to the MPU unit 100. The key input unit 130 can give operation inputs such as playback, stop, and recording of the recording / playback apparatus.
[0035]
A TV (Television) tuner unit 201 and an A / V (Audio / Video) input unit 202 are connected to the encoding unit 200. The encoding unit 200 includes an A / D (Analogue / Digital) conversion unit 211 to which output signals from the TV tuner unit 201 and the A / V input unit 202 are supplied. Here, the analog-digital converted video signal is supplied to the video encoding unit 212, and the audio signal is supplied to the audio encoding unit 213.
[0036]
In addition, text broadcast, subtitle broadcast, and the like from the TV tuner unit 201 are supplied to the sub-picture (SP) encoding unit 214. The SP encoder 214 may be given a signal from an external terminal (not shown).
[0037]
Furthermore, the encoding unit 200 is also provided with a CC (Closed Caption) conversion unit 217. In the CC conversion unit 217, closed caption data superimposed on the vertical blanking period of the video signal guided from the TV tuner unit 201 is extracted.
[0038]
When the closed caption data is recorded, the data is processed in the video encoding unit 212 so as to be inserted into the user area of the GOP. The data inserted into the user area is the DVD standard line 21 data.
[0039]
The digital video signal is compressed by the MPEG method, and the audio digital signal is compressed by the AC3 method or the audio compression by the MPEG method. The audio digital signal may be recorded in a linear PCM (Pulse Code Modulation) format without compression.
[0040]
The outputs of the video encoding unit 212, the audio encoding unit 213, and the SP encoding unit 214 are input to the formatter unit 215 and formatted into the predetermined format described above. Each data is arranged to be a 2048 byte packet. In formatting, the buffer memory unit 216 is used for temporarily storing data.
[0041]
At this time, for example, 1 VOBU is set for each GOP of the MPEG video, and the segmentation information at this time is stored in the buffer memory unit 216, and when the segmentation information is accumulated to some extent, it is transferred to the MPU unit 100. The MPU unit 100 creates time map information (TMAP) based on the information (sent when a GOP head interrupt occurs).
[0042]
Here, as the segmentation information, for example, the size of the VOBU, the playback time from the beginning to the end of the VOBU, the end address of the I picture from the beginning of the VOBU, or a plurality of these are included.
[0043]
Alternatively, the formatter unit 215 may create time map information directly based on the segmentation information and pass it to the MPU unit 100 in the form of TMAP. The data formatted by the formatter unit 215 is input to the data processing unit (D-PRO unit) 600.
[0044]
The data processing unit 600 forms an ECC block for every 16 packs of each encoded data pack sequence, attaches error correction data, and records the data on the optical disc 10 or the recording medium 11 by the drive unit 700. The MPU unit 100 instructs which recording medium to record data on.
[0045]
Here, when the drive unit 700 is in a busy state because of seeking or track jumping, the data is supplied to the temporary storage unit 750 and waits until the drive unit 700 is ready. .
[0046]
In the recording / playback DVD, one video file for moving images and one video file for still images are stored on one disc.
[0047]
The decoding unit 300 includes a separation unit 311 to which a signal from the data processing unit 600 is guided. In the separation unit 311, each data is separated for each type. The video data pack is guided to the video decoding unit 312, the sub-picture data pack is guided to the SP decoding unit 313, and the audio data pack is guided to the audio decoding unit 314.
[0048]
The video data and sub-picture data decoded by the video decoding unit 312 and the SP decoding unit 313 are guided to the video processing unit (V-PRO unit) 315, and are combined and output.
[0049]
The audio data decoded by the audio decoding unit 314 is output via the interface 317 when transmitted in a digital state. Further, when converted into an analog signal, the signal is input to the D / A converter 316 and output, and supplied to, for example, a speaker (not shown).
[0050]
The data output from the video processing unit 315 is input to the video mixing unit 500, and is supplied to the D / A conversion unit 502 and the interface 503 via the data. Data output via the interface 503 is transmitted to, for example, a transmission line (IEEE1394 standard). The analog signal is supplied to a display (not shown).
[0051]
The MPU unit 100 controls each part of the entire recording / reproducing apparatus, and is connected to each block. The system time counter (STC) unit 400 creates time stamp data that serves as a reference for recording and reproduction in the data recording mode and the data reproduction mode.
[0052]
In addition, when the data recorded on the recording medium 11 is converted into a format on the optical disk 10 and recorded, the MPU unit 100 performs setting for conversion on the time stamp conversion unit 800.
[0053]
The data stream is recorded on the optical disc 10 by directly connecting the drive unit 700 and the time stamp conversion unit 800 by switching the switch unit 801. The same applies when the reading source and the recording destination are reversed, and the same applies to writing on the same medium.
[0054]
Normally, when recording data input from the A / V input unit 202 and encoded by the encoding unit 200, there is no need to pass through the time stamp conversion unit 800, so the data is transferred from the data processing unit 600 to the drive unit 700. The switch unit 801 is controlled to supply directly.
[0055]
Further, when the MPU unit 100 wants to refer to the data stream, it is also possible to store the data in the temporary storage unit 750, perform the data processing, and then record the data stream via the time stamp conversion unit 800.
[0056]
In FIG. 1, the time stamp conversion unit 800 is shown as a separate block from the MPU unit 100. However, when the time stamp conversion function described later is realized as software, the time stamp conversion function is included in the MPU unit 100. It can also be realized by storing the data in the main memory unit 101, converting the time stamp, and then recording the data on a recording medium.
[0057]
Next, as described above, a stream recorded in a certain format (assumed to be recorded in the RTR format in this embodiment) is converted into another recording format (DVD video format) and recorded. An example of the operation will be described with reference to the flowchart shown in FIG.
[0058]
In this embodiment, the recording / reproducing apparatus is equipped with a hard disk and a DVD disk drive as recording media, and recorded on the HDD (Hard Disk Drive) in the RTR format, but on the DVD disk in the DVD video format. The conversion and recording will be described as an example, but conversion from a DVD drive to an HDD is also possible, and even when the recording / reproducing apparatus has only one type of recording medium, recording in a different format within the same recording medium It is also possible to reserve and record the area.
[0059]
Further, if the recording medium is an overwritable recording medium and the data to be written can be saved in a storage medium such as a memory provided in the recording / reproducing apparatus, format conversion between the same media is possible.
[0060]
From the data in the HDD recorded in the RTR format, a title to be converted to the DVD video format is selected to be recorded on the DVD disc, and the VOB included in the title is transferred. Of the data recorded in the RTR format, a plurality of VOBs may be subject to transfer, and a part of one VOB may be subject to transfer. In either case, processing is performed in units of VOBs recorded in the RTR format. When a plurality of VOBs are to be transferred, processing in units of VOB is repeated for the number of VOBs.
[0061]
The MPU unit 100 designates a VOB to be transferred, and saves the head VOBU of the target VOB from the hard disk to the temporary storage unit 750. The MPU unit 100 rewrites the RDI pack existing in the top pack of the top VOBU from the RDI pack information and management information to the PCI packet information and the DSI packet information to generate a navigation pack. The RDI pack saved in the temporary storage unit 750 is overwritten. Thereby, the RDI pack in the RTR format is rewritten to the navigation pack in the DVD video format.
[0062]
The MPU unit 100 starts to transfer the VOBU data saved in the temporary storage unit 750 to the DVD disk when the generation of the navigation pack is completed. In the DVD video format, the MPU unit 100 starts to transfer the SCR of the first pack of each VOB. The value must be “0”.
[0063]
In order to comply with this standard, from the saved data, the value of the SCR described in the pack header shown in FIG. 3 of the RDI pack that is the first pack in the first VOBU of each VOB recorded in the RTR format. The MPU unit 100 sets the SCR value as an offset value for time stamp conversion in the time stamp conversion unit 800.
[0064]
After the setting of the offset value is completed, the VOBU stream saved in the temporary storage unit 750 is sent to the time stamp conversion unit 800. Next, the subsequent VOBU is saved in the temporary storage unit 750, and the RDI pack is rewritten to the navigation pack as described above.
[0065]
Except for the VOBU at the head of the VOB, the time stamp conversion unit 800 does not set the offset value. By repeating the above processing up to the final VOBU of the VOB, the transfer of the VOB is completed, and stream data that meets the DVD video standard can be generated.
[0066]
The management information of the DVD video format for the transferred data stream is created by the MPU unit 100 based on the management information of the RTR format existing in the hard disk, and recorded on the DVD disk with an appropriate file system. Also, writing to the DVD disk is performed.
[0067]
The time stamp conversion unit 800 determines the pack type from the stream_id and sub_stream_id described in each type of packet header, and converts the time stamp information by each pack. The conversion method is described below for each type of pack.
[0068]
(1) Video pack
FIG. 14 shows the structure of the packet header of the video pack. When stream_id = 111100000b, it is determined as a video pack, and it is determined whether it is the first video pack of VOBU.
[0069]
The first video pack in the VOBU has a system header written in the pack. For this reason, in the first video pack and other video packs, the positions in the pack where the packet header is described are shifted by the size of the system header.
[0070]
The time stamp conversion unit 800 reads the SCR value from the pack header shown in FIG. 3, subtracts the offset value (TM_OFFSET) set by the MPU unit 100 from the read SCR value, and reads it with the same format. Write back to the SCR position.
[0071]
If the read SCR value is smaller than the TM_OFFSET value, data that violates the standard is created by performing time stamp conversion, and this is notified to the MPU unit 100.
[0072]
Next, PTS_DTS_flag in the packet header is read. When this value is 00b, PTS and DTS do not exist in this packet header. In this case, PES_extension_flag in the packet header is read. If this value is 0, there is no problem because it matches the contents of the PTS_DTS_flag. However, if a value other than 0 is described, there is a possibility that PTS and DTS information exists. Notify When PTS_DTS_flag is 00b, the processing of this packet is finished, and the processing is shifted to the next packet.
[0073]
When PTS_DTS_flag is 10b, only PTS data is recorded in this packet header. The time stamp conversion unit 800 reads this PTS data, compares it with the TM_OFFSET value, and if the PTS data is equal to or greater than the TM_OFFSET value, subtracts the TM_OFFSET value from the PTS data, matches the format, and places it at the position of the read PTS. Write back the subtracted value. If the PTS data is smaller than the TM_OFFSET value, the MPU unit 100 is notified accordingly.
[0074]
When PTS_DTS_flag is 11b, PTS and DTS data are recorded in this packet header. The time stamp conversion unit 800 reads this PTS and DTS data, compares it with the TM_OFFSET value, and if the PTS and DTS data are equal to or greater than the TM_OFFSET value, subtracts the TM_OFFSET value from the PTS and DTS data, respectively, The subtracted value is written back to the read PTS and DTS positions. If the PTS or DTS data is smaller than the TM_OFFSET value, the MPU unit 100 is notified accordingly.
[0075]
(2) Audio pack (other than MPEG audio Format2)
FIG. 15 shows the structure of the packet header of the linear PCM audio pack. FIG. 16 shows the structure of the packet header of the Dolby AC3 audio pack. FIG. 17 shows the structure of the packet header of the MPEG audio pack.
[0076]
The processing for the audio pack is the same as the processing for the video pack. However, in the case of the audio pack, since there is no DTS data, the processing when the PTS_DTS_flag of the video pack processing is 11b does not occur.
[0077]
(3) Audio pack (MPEG audio Format2)
Unlike other audio packs, an audio pack recorded in MPEG audio Format 2 has a plurality of packet headers in one pack. The pack header process is the same as the video pack process, and the packet header process is the same as the audio pack.
[0078]
Here, the processing end determination in the packet is different, so this processing will be described. Based on stream_id and sub_stream_id, it is determined that the audio pack is recorded in MPEG audio Format 2, and after performing a time stamp change process for the pack header and the first packet header, PES_packet_length in the packet header is read.
[0079]
This data describes the packet length, and the position of the next packet header in the pack can be calculated based on the value of PES_header_data_length. If padding data (000001BEh) is written at the calculated position, the packet header does not exist in this pack, and the processing in the pack ends. In other cases, the time stamp process of the packet header is performed, and the process proceeds to the next packet header process.
[0080]
(4) Sub-picture pack
FIG. 18 shows the structure of the packet header of the sub-picture pack. The processing for the sub-picture pack is the same as the processing for the audio pack (2).
[0081]
(5) Navigation pack
FIG. 19 shows the structure of the packet header of the RDI pack. For the navigation pack changed from the RDI pack, only the SCR conversion of the pack header is performed.
[0082]
When the time stamp conversion process is completed for all packs in the VOBU, the MPU unit 100 performs the same process for the next VOBU and continues the process for all VOBUs in the VOB. VOB time stamp conversion is completed.
[0083]
The present invention is not limited to the above-described embodiment, and can be variously modified and implemented without departing from the scope of the invention.
[0084]
【The invention's effect】
As described above in detail, according to the present invention, an RTR format data stream can be easily converted into a DVD video format data stream for recording on a DVD video player. A very good format conversion apparatus and format conversion method can be provided.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a recording / reproducing apparatus according to an embodiment of the present invention.
FIG. 2 is a view for explaining a directory structure of information recorded on the optical disc in the embodiment;
FIG. 3 is a view for explaining a detailed structure of a pack header provided in the pack according to the embodiment;
FIG. 4 is a view for explaining a detailed structure of a navigation pack according to the embodiment.
FIG. 5 is a view for explaining the detailed structure of the top video pack in the VOBU in the embodiment;
FIG. 6 is a view for explaining a detailed structure of a video pack other than the head in the VOBU in the same embodiment;
FIG. 7 is a view for explaining the detailed structure of the audio pack (linear PCM) in the embodiment;
FIG. 8 is a view for explaining a detailed structure of an audio pack (Dolby AC3) in the embodiment;
FIG. 9 is a view for explaining a detailed structure of an audio pack (MPEG audio) in the embodiment;
FIG. 10 is a view for explaining a detailed structure of an audio pack (another MPEG audio) in the embodiment;
FIG. 11 is a view for explaining a detailed structure of a sub-picture pack in the embodiment.
FIG. 12 is a view for explaining the detailed structure of the RDI pack in the embodiment;
FIG. 13 is a flowchart shown for explaining the format conversion operation in the embodiment;
FIG. 14 is a view for explaining the detailed structure of the packet header of the video pack in the embodiment;
FIG. 15 is a view for explaining the detailed structure of the packet header of the audio pack (linear PCM) in the embodiment;
FIG. 16 is a view for explaining the detailed structure of the packet header of the audio pack (Dolby AC3) in the embodiment;
FIG. 17 is a view for explaining the detailed structure of the packet header of the audio pack (MPEG audio) in the embodiment;
FIG. 18 is a view for explaining the detailed structure of the packet header of the sub-picture pack in the embodiment.
FIG. 19 is a view for explaining the detailed structure of the packet header of the RDI pack in the embodiment;
[Explanation of symbols]
10 ... Optical disc,
11 ... Recording medium,
100 ... MPU section,
200 ... encoding part,
300 ... decoding unit,
400 ... STC section,
600: Data processing unit,
700 ... drive section,
800: Time stamp conversion unit.

Claims (6)

In a format conversion device for converting a data stream in RTR format into a data format in DVD video format,
For the RTR format data stream, the PCI packet information and the DSI packet generated based on the RDI pack information and the management information, the RDI pack existing in the first pack of the first video object unit of the video object. Rewriting means for rewriting information,
Setting means for setting, as an offset value, the value of the SCR described in the pack header of the RDI pack existing in the first pack of the first video object unit of the video object constituting the RTR format data stream;
For the data stream in the RTR format, the SCR value is read from the pack header of the pack constituting the video object unit of the video object, and the offset value set by the setting means is read from the read SCR value. Subtracting and writing back to the position of the read SCR, and when the read SCR value is smaller than the offset value, a first control means for notifying the MPU unit that controls the format conversion process;
For data stream of the RTR format, by subtracting the offset value set by the setting means from the PTS data or DTS data indicated PTS_DTS_ flag in the packet header of the pack constituting the video object unit of the video object corresponding but written back to the position of the PTS data or DTS data, if PTS data or DTS data the PTS_DTS_ flag indicates it is less than the offset value, and second control means for notifying the MPU unit that controls the format conversion process A format conversion apparatus comprising: Before SL DVD video format converted data stream into a data format of the RTR format format conversion apparatus according to claim 1, wherein the data streams are recorded in different recording areas of a recording medium that has been recorded, characterized in Rukoto of . Before SL DVD data is converted into the data format of the video format stream, the format conversion according to claim 1, wherein Rukoto recorded on a different recording medium from the recording medium RTR format of the data stream is recorded apparatus. In a format conversion method for converting an RTR format data stream into a DVD video format data format,
For the RTR format data stream, the PCI packet information and the DSI packet generated based on the RDI pack information and the management information, the RDI pack existing in the first pack of the first video object unit of the video object. Rewriting process to rewrite information,
A setting step of setting, as an offset value, the SCR value described in the pack header of the RDI pack existing in the first pack of the first video object unit of the video object constituting the RTR format data stream;
For the data stream in the RTR format, the SCR value is read from the pack header of the pack constituting the video object unit of the video object, and the offset value set in the setting step is calculated from the read SCR value. Subtracting and writing back to the position of the read SCR, and when the read SCR value is smaller than the offset value, a first control step of notifying the MPU unit that controls the format conversion process;
For data stream of the RTR format, by subtracting the offset value set in the setting step from PTS data or DTS data indicated PTS_DTS_ flag in the packet header of the pack constituting the video object unit of the video object corresponding but written back to the position of the PTS data or DTS data, if PTS data or DTS data indicated by the PTS_DTS _ flag is smaller than the offset value, a second control step of notifying the MPU unit that controls the format conversion process A format conversion method comprising: Before SL DVD video format converted data stream into a data format of the format conversion method according to claim 4, wherein the RTR format of the data stream is characterized Rukoto recorded in different recording areas of the recording medium being recorded . Before SL DVD data is converted into the data format of the video format streams, according to claim 4 format conversion, wherein Rukoto recorded on a different recording medium is a recording medium in which the RTR format of the data stream is recorded Method.

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