JP2003189231A - Method and device for copying data encoded to compressed code and method and device for editing data encoded to compressed code - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the processing volume when copying a bit stream in a DVD system for recording in accordance with a play list. <P>SOLUTION: Information related to the play list is read out from a VR<SB>-</SB>MANGR.IFO file to obtain the address range of a bit stream corresponding to play list reproducing. The bit stream in the obtained range is copied from a copy original and is written in a copy destination. Time information in the stream is converted in the case of difference of time information between the copy original and the copy destination. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for copying compressed coded data represented by bit streams between different recording media and a technique for converting compressed coded data.

[0002]

2. Description of the Related Art Recently, in addition to hard disks, DVD-type recording media have been used as recording media for recording video and audio as digital signals.
Optical discs such as ROM, DVD-R, DVD-RAM, and DVD-RW are becoming popular. Since a hard disk recorder literally uses a hard disk as a recording medium, it generally has a larger storage capacity and a higher access speed than an optical disk such as a recordable DVD, but it is a stationary type and cannot record recorded data. Further, the DVD recorder has an advantage that an optical disk as a recording medium can be taken out, but its storage capacity is inferior to that of a hard disk recorder. Therefore, a hybrid recorder, which has the advantages of both a hard disk recorder and a DVD recorder, is drawing attention.

The DVD-ROM is a read-only optical disk, and the DVD-R, DVD-RAM, and DVD-RW are optical disks capable of recording and reproducing. The DVD-R cannot be rewritten once it is recorded, but the DVD-R
The AM and DVD-RW can be rewritten multiple times.

In the hybrid recorder, the material recorded by a television broadcast or a video camera for a long time is recorded in a large-capacity hard disk and is desired to be stored, or it is desired to view it with another DVD player or a DVD recorder. Sometimes DVD-R, DVD-RAM, DVD-RW
It is supposed to be used for copying.

The recording method adopted in these optical discs is the DVD Specifications f
or Read-Only Disc (hereinafter, referred to as a reproduction-only DVD system) and DVD Specica
editions for DVD-RAM / DVD-RW /
There are two types of DVD-R for General Discs (hereinafter, referred to as a recording DVD system). The read-only DVD method is a method standardized for a read-only DVD player, and includes DVD-ROM, DVD-R,
It is used in DVD-RW. The recording DVD system is
It is a standardized method for DVD recorders, DVD
It is used in -R, DVD-RW, and DVD-RAM. Since the hard disk recorder is of a stationary type, it does not matter which data is recorded on the hard disk by any recording method, but in general, it is based on the recording DVD method, which is the standard for DVD recorders, or the recording DVD method. It is recorded by the original method.

Both the reproduction-only DVD system and the recording DVD system are ISO / IE as compression encoding systems for video data.
C13818-2 (commonly called MPEG2 video) is an ISO / IEC standard as one of the compression encoding methods for audio data.
11172-3 (commonly called MPEG audio) is adopted, and a bit stream is used as a method of generating a multiplexed bit stream in which a video bit stream obtained by compression encoding video data and an audio bit stream obtained by compression encoding audio data are multiplexed. ISO / IE, which is a multiplexing method of
C13818-1 (commonly called MPEG2 system) is adopted. In the MPEG2 system, there are two types of multiplexed bitstreams, a program stream in which only one program is configured in one stream and a transport stream in which a plurality of programs can be configured in one stream. is there.

The common points between the reproduction-only DVD system and the recording DVD system will be described. In both schemes, the pack of the multiplexed bit stream of the MPEG2 system has a fixed length of 2048 bytes, and the number of video PES packets and audio PES packets contained in one pack is defined as one. A pack having video PES packets is called a video pack, and a pack having audio PES packets is called an audio pack. By multiplexing the video pack and the audio pack, one multiplexed bitstream is formed.

FIG. 15 shows the logical structure of a pack in a multiplexed bitstream of the MPEG2 system. The pack header at the beginning of the pack indicates S indicating the pack input reference time.
CR (System Clock Reference)
e) 1501 is added, and the logical structure is such that the packet 1502 follows the SCR 1501. Also, the packet header contains PTS (Presenta) indicating the display time.
section time stamp (1503), DTS (Decoding Time Stam) indicating the decoding time
p) 1504 is added. The data 1505 in which the audio signal and the video signal are compression-encoded has a logical structure following the packet header. Note that only data 1505 is compression-encoded, and SCR1
Pack header including 501, PTS1503 and DTS
The packet header containing 1504 is not compression encoded.

Both types of Video Object
Unit (VOBU) and VideoObject (VO
It defines a collection of packs called B). VOB
U is an aggregate of packs from a pack having a system header to a pack immediately before the pack having the next system header. A VOB is an aggregate of a plurality of VOBUs. A VOB is an aggregate of a plurality of VOBUs. VOB
U needs to include a video signal or audio signal having a reproduction time of 0.4 seconds to 1 second. When the VOBU includes a video pack, the video data must include one or more GOPs. GOP is a concept defined by MPEG2 video, and is a collection of still images that form video. Usually, a GOP is often composed of 15 still images having a reproduction time of 0.5005 seconds, and the number of GOPs included in a VOBU is often one.

In the recording DVD system, it is possible to realize a function of reproducing an arbitrary portion of a multiplexed bit stream which is compression encoded data in an arbitrary order using a playlist. Since the playlist has a logical data structure indicating the playback position of the recorded multiplexed bitstream, deleting or editing the playlist does not affect the original multiplexed bitstream. . Regarding the logical structure of the playlist, Japanese Patent Laid-Open No. 2000-2000
Details are described in -322878.

DVD-R, DVD-RAM, DVD-RW from among a large amount of images recorded on the hard disk
Even in the case of duplicating a required image on an optical disc such as, the duplication can be easily performed by designating the range to be duplicated by using the playlist function.

Conventionally, a multiplexed bit stream recorded on a hard disk is recorded by using a playlist function.
When copying to an optical disc such as VD-R, DVD-RAM, DVD-RW, etc., the multiplexed bitstream is once decoded according to the playlist, and the decoded signal is compressed again by the reproduction DVD system or the recording DVD system. It has been duplicated after being encoded to generate a multiplexed bitstream.

[0013]

In the prior art, when the reproduction using the playlist function is performed, the signal once decoded according to the playlist is compressed and encoded and recorded again. Therefore, the reproduction is required. The processing amount and processing time were enormous. Further, since decoding and recompression encoding processing are required, it is not possible to copy the original compressed encoded data as a multiplexed bitstream as it is.

An object of the present invention is to provide a compression-encoded data duplication technique and an editing technique capable of duplicating or editing the original compression-encoded data as it is without performing decoding and recompression encoding processing. To provide.

[0015]

Since the original compressed coded data is copied as it is without performing the decoding and recompression coding processes, the present invention uses the compressed coded data and the compressed coded data. When a part of the compression-encoded data is read from the first recording medium in which the selection information for selecting decoding and reproduction of a part of the encoded data is recorded and copied to the second recording medium, The start point and the end point of the selected compression coded data are obtained, the compression coded data from the start point to the end point is read from the first recording medium, and the read compression coded data is copied to the second recording medium. To do.

Further, since the original compression-encoded data is edited as it is without performing the decoding and re-compression encoding processing, in the present invention, the compression-encoded data and the compression-encoded data are processed. When editing the compression encoded data on the first recording medium in which selection information for selecting a part of decoding and reproduction is recorded, a start point and an end point of the compression encoded data selected by the selection information are obtained. The compressed coded data other than the compressed coded data from the start point to the end point is deleted.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described. The apparatus of the first embodiment uses, as compression-encoded data, an arbitrary portion of the multiplexed bitstream in an arbitrary order from a multiplexed DVD-type recording bitstream recorded on a hard disk as a first recording medium. It is a duplication device capable of reading a multiplexed bitstream corresponding to a playlist, which is selection information for selecting reproduction, and duplicating it on a DVD-RAM as a second recording medium.

FIG. 1 shows a block diagram of the first embodiment.

The user I / F 105 accepts a duplication request from the user through a remote control operation or the like, and the duplication control unit 10
3 is requested to start the duplication operation.

The duplication control unit 103 has a user I / F 105.
When the copy request is received from the hard disk of the copy source, VR_MANGR. Instruct the hard disk drive 101 to read the IFO file. VR_MA
NGR. Information regarding the playlist is recorded in the IFO file.

Further, the duplication controller 103 uses the VR read by the hard disk drive 101 from the hard disk.
_MANGR. User I / F1 from IFO file
The information corresponding to the play list designated by 05 is searched to detect the target VOB and the address start point and address end point of the replication target range in the multiplexed bitstream of the replication source.

Further, the copy control unit 103 uses the VR read from the hard disk by the hard disk drive 101.
_MANGR. User I / F1 from IFO file
Based on the playlist specified by VR_MANGR.05 to be recorded in the copy destination DVD-RAM. The IFO file is generated and transferred to the DVD-RAM drive 104. It should be noted that VR_MA has already been written in the copy destination DVD-RAM.
NGR. If an IFO file is recorded, this VR_MANGR. Since it is necessary to rewrite the IFO file into a file that reflects the result of the duplication, the duplication control unit 103 determines that the VR_MANGR. VR_MANGR.IFO file read from the hard disk by the IFO file and the hard disk drive 101. User I from the IFO file
/ F105 to record on the destination DVD-RAM based on the playlist specified by VR_MANGR. IF
An O file is generated and transferred to the DVD-RAM drive 104.

Further, the copy control unit 103 uses the VR_MOVIE. The hard disk drive 101 is instructed to read the multiplexed bitstream in the duplication target range from the multiplexed bitstream in the VRO file. VR_MOVIE. A multiplexed bitstream is recorded in the VRO file.

The multiplexed bit stream in the duplication target range is VR_MOVI recorded on the hard disk.
E. VR_MOVIE.VRO that is a part of the VRO file and is recorded on the hard disk. It is not the VRO file itself. Therefore, a new VR_MOVIE. A VRO file needs to be generated. Therefore, the file generator 1
02 is a new VR_MOV for the multiplexed bitstream read from the hard disk drive 101.
IE. A VRO file is generated, and a multiplexed bitstream in the range to be copied is added to a new VR_MOVIE. It is output to the DVD-RAM drive 104 as a VRO file.

The file generation unit 102 includes a copy control unit 10
If there is an instruction from 3 to change the time information in the multiplexed bit stream, the time information is replaced and then VR is applied.
_MOVIE. VRO file is generated and DVD-RA
Output to the M drive 104.

The DVD-RAM drive 104 outputs the VR_MOVIE. VRO
File and VR_MANGR. DVD IFO file
-Write to RAM.

In addition, VR_MOVIE. VRO file and VR_MANGR. Details of the IFO file will be described later. Further, the file generation unit 102 and the copy control unit 103 are assumed to be configured by circuits such as IC and LSI, and the file generation unit 102 and the copy control unit 1
03 may be integrated in one circuit, or may exist as separate circuits.

FIG. 2 shows the concept of a playlist in the recording DVD system. Multiplexed bitstream is athletic meet,
It should be recorded in the order of birthday, picnic, and Christmas. If you play without specifying the playlist, it will play in the order of athletic meet, birthday, picnic, and Christmas. That is, all the contents are reproduced in the recorded order.

On the other hand, when the play list # 1 is reproduced, the athletic meet, birthday, Christmas, and picnic are reproduced in this order. That is, the order of the multiplexed bitstream is changed and reproduced.

In playlist # 2, the birthday, Christmas, and athletic meet are reproduced in this order. That is, reproduction is performed excluding the multiplexed bitstream related to the picnic in the multiplexed bitstream.

Since the user can arbitrarily specify a part of the original multiplexed bitstream by creating the playlist in this way, the order of the multiplexed bitstream can be arbitrarily changed and reproduced, or unnecessary. It is possible to play by skipping the part. In the recording DVD recording method, 99 playlists can be created.

FIG. 3 shows the logical structure of the copy source data and the copy destination data of the recording DVD system. DVD system for recording,
In both the read-only DVD system, DVD data is mainly composed of presentation data and navigation data. The presentation data is the actual multiplexed bitstream, and the navigation data is the information about the playback control of the presentation data.
In the recording DVD system, navigation data is VR_M
ANGR. The presentation data recorded in the IFO file is VR_MOVIE. It is recorded in the VRO file. VR_MANGR. BUP file is VR_M
ANGR. It is a backup file having the same contents as the IFO file. All information about playlists is VR
_MANGR. It is recorded in the IFO file. In the duplication of the multiplexed bitstream corresponding to the playlist, the VR_recorded on the duplication source hard disk is used.
MOVIE. VRO file and VR_MANGR. I
Since the FO file cannot be copied as it is,
VR_MOVI recorded on DVD-RAM that is the copy destination
E. VRO file and VR_MANGR. You need to generate an IFO file.

In FIG. 4, VR_MOVIE. The logical structure of a VRO file is shown. A collection of the video pack 403, the audio pack 404, etc. is a VOBU 402,
U needs to include a video signal or audio signal having a reproduction time of 0.4 seconds to 1 second. This VOB
The aggregate of U is a VOB 401, and the VOB is the main recording unit of the multiplexed bitstream. VR_MOVI
E. Several VOBs are recorded in the VRO file.

In FIG. 5, VR_MANGR. The logical structure of an IFO file is shown. VR_MANGR. The IFO file includes disk management information 501 and moving image file information 50.
2, still image file information 503, original program chain information 504, user-defined program chain information table 505, text data manager 506,
It is composed of a manufacturer information table 507.

The disc management information 501 has a playlist search pointer table together with the management information of the entire disc, and the basic information of the playlist can be obtained by referring to this table.

VR_MO is included in the moving image file information 502.
VIE. VOB information related to the VRO file is recorded. Further, in the still image file information 503, when a still image is recorded on the disc, the V of the still image is recorded.
OB information is recorded.

Original program chain information 504
In the recorded VR_MOVIE. VOB information in the VRO file is recorded.

In the user-defined program chain information table 505, user-defined program chain information 505A, which is detailed information when reproducing a playlist, is recorded by the number N of playlists (N is a natural number of 1 to 99). . The playlist displayed on the display screen is generated and displayed based on the program chain information 505A. By designating the playlist displayed on the display screen, the user can instruct decoding and reproduction of the multiplexed bitstream selected by the playlist, and can also instruct duplication and editing.

Since the text data manager 506 and the manufacturer information table 507 are not essential items and have no direct relation to the present patent, their explanations are omitted.

For normal reproduction, VR_MOVI is used according to the original program chain information 504.
E. Play presentation data such as a VRO file. When playing a playlist, VR_MOV is set according to the user-defined program chain information 505A in the user-defined program chain information table 505.
IE. Play presentation data such as a VRO file.

The entire procedure from the start of copying to the end of copying shown in FIG. 6 will be described with reference to FIGS. 7, 8 and 9. This procedure is executed by the copying apparatus shown in FIG.
FIG. 7 shows a VR_MO newly created by copying a multiplexed bitstream corresponding to a playlist in the recording DVD system.
VIE. It is a conceptual diagram which shows the process in which a VRO file is produced | generated. FIG. 8 and FIG. 9 show the addition of VR_MANGR. It is a conceptual diagram which shows the process in which an IFO file is produced | generated.

Prior to the description of FIG. 6, FIG. 7 will be described. VR_MANGR. The concept of program exists in the original program chain information in the IFO file, and one program has one or more cells. A cell is a logical playback unit. In this figure,
An example is shown in which one program has only one cell.

VR_MANGR. The corresponding VR_MOVIE. The VOB information of the VOB recorded in the VRO file is recorded. Each VOB information has a time map, and this time map shows logical reproduction time information in VR_MOVIE.
It is a table for converting into physical address information in a VRO file. Original program chain information 50
In 4A, the cell covers the entire time map range of each VOB information. In this figure, an example in which VOB # 1 to VOB # 3 are recorded on the hard disk which is the copy source is shown.

Original program chain information 504
In the normal reproduction according to A, the entire range of all VOBs, that is, VOBU # 1 of VOB # 1 to VOBU of VOB # 3
m + n + k to cell # 1 (504a-1), cell # 2 (5
04a-2) and cell # 3 (504a-3) in this order.

On the other hand, the concept of a program does not exist in the user-defined program chain information. The cell indicates only the range designated by the user from the time map corresponding to the VOB information of the VOB designated by the user. In the playlist reproduction according to the user-defined program chain information 505A, VOBUm + 2 to VOBU of VOB # 2, which is the range specified by the user of the VOB specified by the user.
VOBU # m + n + 1 to V of m + n-1 and VOB # 3
OBUm + n + k-1 can be reproduced in the order specified by the user. In this figure, cell # 1 (505a-
1) and cell # 2 (505a-2) are reproduced in this order. Further, as described above, there is a maximum of 99 pieces of user-defined program chain information 505A, but in this figure, an example in which there is only one piece is shown for convenience of explanation.

In this embodiment, only the VOBU in the range indicated by the user-defined program chain information 505A is read from the hard disk as the copy source and copied. However, the VR_MOVIE. It is necessary to generate a VRO file, and VR_MOVI on the hard disk that is the copy source
E. Since the contents are different from those of the VRO file, the file generator 102 newly adds VR_MOVIE. A VRO file is generated.

The copy destination D in the present embodiment shown in FIG.
VR_MOVIE.VD-RAM. In the VRO file, the copy source VOB # 2 VOBUm + 2 to VOBUm
+ N-1 is VOBU # 1 to VOBU # n- of VOB # 1
VOBU # m + n of the copy source VOB # 3.
+1 to VOBUm + n + k-1 is the VOBU of VOB # 2
#N to VOBU # n + k-1.

The steps shown in FIG. 6 are as follows. Step # 600: The duplication control unit 103 determines that the VR_MANGR. IF
The user-defined program chain information 505A of the playlist to be copied shown in FIG. 7 is read from the O file. If it cannot be read, the copy cannot be performed, and the process proceeds to step # 604. Details of step # 600 will be shown later in FIG.

Step # 601: The copy control unit 103
Read user-defined program chain information 505A
From this, the address ranges A1 to A2 and A3 to A4 of the VOB to be copied shown in FIG. 7 are obtained. The details of step # 601 will be shown later in FIGS.

Step # 602: The copy control unit 103
The DVD-RAM drive 104 is made to calculate the free space of the DVD-RAM, and the information of the free space of the DVD-RAM is obtained.

Step # 603: The copy control unit 103
The data amount of the address ranges A1 to A2 and A3 to A4 is compared with the free area of the DVD-RAM which is the copy destination, and the DV
If the free area of the D-RAM is larger or the same as the data amount of the address ranges A1 to A2 and A3 to A4, the process proceeds to step # 605. On the contrary, if it is smaller, the process proceeds to step # 604.

Step # 604: The copy control unit 103
Control is performed so that an error message is displayed on the display screen of a television or monitor separate from the display means (not shown) provided in the device and the device.

Step # 605: The copy control unit 103
Controls the DVD-RAM drive 104 to control the DVD-RA
It is confirmed whether M is a raw disc which is a disc on which no data is recorded. If the disc is a raw disc, the VR-MANGR. Since the IFO file is not recorded, the process proceeds to step # 606, and if it is not a raw disc, VR_MANGR. IFO
Since the file is recorded, the process proceeds to step # 608.

Step # 606: File generation unit 102
Is the VR_M read in the previous step # 600.
ANGR. VR_MANGR.Recording on DVD-RAM based on IFO file. Generate an IFO file. At this time, as shown in FIG. 8, the content of the user-defined program chain information 505A corresponding to the playlist to be copied is VR_M recorded in the DVD-RAM.
ANGR. It is reflected in the original program chain information 504B in the IFO file.

That is, the cell 5 in the user-defined program chain information 505A read from the hard disk.
05a-1 and cell 505a-2 are DVD-
Original program chain information 5 recorded in RAM
This is the cell 505b-1 and the cell 505b-2 in 04B.

The user-defined program chain information 505A corresponding to the playlist to be copied is used as the user-defined program chain information 505B on the DVD.
VR_MANGR. To record in RAM. Generation in the IFO file is optional, not mandatory, but DVD
-Considering the convenience of reproducing the multiplexed bitstream copied to the RAM according to the instruction of the playlist, VR_MANGR.VD that is recorded on the DVD-RAM as the user-defined program chain information 505B. IFO
It is preferable to generate it in a file. In this case, the cell 505b-1 in the copy destination user-defined program chain information 505B is rewritten to the same content as the copy destination original program chain information 504b-1. Similarly, copy destination user-defined program chain information 505
The cell 505b-2 in B is rewritten with the same contents as the original program chain information 504b-2 of the copy destination.

Step # 607: The copy control unit 103
VOBU # m + 1 to VO of VOB # 2, which is a multiplexed bitstream of the address range A1 to A2 to be copied
BU # m + n-1 and VOBU # m + n of VOB # 3, which is a multiplexed bitstream of address ranges A3 to A4
Control is performed so that +1 to VOBU # m + n + k-1 are transferred from the hard disk to the file generation unit 102. The file generation unit 102 uses the multiplexed bitstream VOBU # m + 1 transferred from the hard disk drive 101.
~ VOBU # m + n-1 and VOBU # m + n + 1 to V
VR_MOVIE.OBU # m + n + k-1. V
An RO file is generated and the DVD-RAM drive 104
Output to and duplicate. As a result of duplication, the destination DVD-
VR_MOVIE.RAM on RAM. In the VRO file, the above-mentioned VOBU # m + 1 to VOBU # m + n-1 are VOBs.
VOBU # 1 to VOBU # n-1 as # 1
VOBU # m + n + 1 to VOBU # m + n + k-1 are V
VOBU # n to VOBU # n + k-1 as OB # 2
Becomes

When there is an instruction from the copy control unit 103 to change the time information in the multiplexed bitstream, the file generation unit 102 replaces the time information and then outputs VR_MOVIE. Generate VRO file, DVD
-Output to the RAM drive 104 and duplicate. A method of replacing the time information will be described later.

Further, the DVD-RAM as the copy destination is not the raw disk but the VR_MOVIE. When a VRO file is recorded, this VR_MOVIE. VRO
VOB will be added to the file.

Step # 608: The copy controller 103
VR_ that has already been recorded from the copy destination DVD-RAM
MANGR. The hard disk drive 101 is controlled to read the IFO file, and VR_MANGR. IF
Read O file.

Step # 609: File generation unit 102
VR_MANGR.com read out in the previous steps # 600 and # 608. VR_MANGR.Recording on DVD-RAM based on IFO file. I
Generate a FO file. At this time, as shown in FIG.
The user-defined program chain information 505A corresponding to the playlist to be copied is VR_MANGR. It is reflected in the original program chain information 504D in the IFO file.

That is, the cell 5 in the original program chain information 504C read from the DVD-RAM.
04c-1 becomes a cell 504d-1 in the original program chain information 504D to be recorded in the DVD-RAM, and cells 505a-1 and 505a-2 in the user-defined program chain information 505A read from the hard disk are respectively in the DVD-RAM. The cell 50 in the original program chain information 504D to be recorded in
5d-2 and cell 505d-3.

The user-defined program chain information 505A corresponding to the playlist to be copied is used as the user-defined program chain information 505B on the DVD.
VR_MANGR. To record in RAM. It is the same as the case of step # 606 in that the generation in the IFO file is arbitrary.

For this procedure, VR_MANGR. I
FO file to VR_MOVIE. Although it has been described that the VRO file is generated and recorded on the DVD-RAM before the VRO file, the step # 603 is performed between the steps # 603 and # 605.
It may be a procedure of executing 607. Further, in this procedure, if the disc is not a raw disc, VR_MANGR. IF
Although it has been described that the O file is rewritten, the contents in the raw disk are once erased, and the V
R_MANGR. You may create a new IFO file.

Next, details of obtaining the VOBU to be copied will be described. FIG. 10 shows a flowchart for obtaining the copy target VOB information, the copy start time, and the copy end time. Figure 10
Each step of is as follows.

Step # 1000: The copy control unit 103 controls the hard disk drive 101 to perform VR_MAN.
GR. Read the IFO file, disk management information 5
It is confirmed whether PL_SRPT_Ns which is one of 01 is 0. PL_SRPT_Ns is information indicating the number of playlists.

If PL_SRPT_Ns is 0, the play list itself does not exist and the multiplexed bit stream corresponding to the play list cannot be copied. Therefore, the process proceeds to step # 604. Also, PL
If _SRPT_Ns is other than 0, the process proceeds to step # 1001.

Step # 1001: When there are two or more playlists, the user selects the playlist to be used for duplication. The user I / F 105 notifies the replication control unit 103 of the playlist selected by the user. VR_MANGR. In the IFO file, one PL_SRP is recorded for one type of playlist. P
L_SRP is one of the disk management information 501.
In PL_SRP, a playlist generation time, a user-defined program chain number, etc. are recorded. Copy control unit 10
3 obtains the user-defined program chain number from the PL_SRP of the playlist selected by the user. Next, the copy control unit 103 determines that the VR_MANGR. IF
The user-defined multiplexed bit chain information table 505 in the O file is accessed. Copy control unit 103 is PL
Target user-defined program chain information 5 according to the user-defined program chain number obtained from _SRP
Select 05A.

Step # 1002: Copy control unit 103
Is the user-defined program chain information 505A to V
M_VOBI_SRPN indicating the number of OB information, C_V_S_ indicating the cell start times T1 and T3 (see FIG. 7).
Read C_V_E_PTM indicating PTM and cell end times T2 and T4 (see FIG. 7).

Step # 1003: Copy control unit 103
Reads the VOB information indicated by M_VOBI_SRPN, and proceeds to step # 601 described above. As described above, the VOB information has a time map, and the start time and end time of the cell are read. Therefore, by executing step # 601, VR_MOVIE. The physical address information in the VRO file can be obtained.

FIG. 11 shows a flowchart for obtaining the address of the VOBU at the replication start point in the VOB to be replicated.
The steps of FIG. 11 are as follows. The following processing is all performed by the copy control unit 103.

Step # 1100: First, the cell reproduction start time T from the start time T0 (see FIG. 7) of the target VOB, T3.
R_PTM, which is the relative display time up to 1 and T3, is calculated by the following formula. R_PTM = C_V_S_PTM-VOB_V
_S_PTM VOB_V_S_PTM is the playback start time of the VOB. VOB_V_S_PTM is M_V stored in memory
From OBI_SRPN to VR_MANGR. It can be obtained by accessing the VOB information to be copied in the IFO file.

Step # 1101: C_V_S_PTM
And search for time entries in the vicinity. VR_MANG
R. TFO interval for IFO file (TMU is a fixed time interval, usually 600 video field time)
In the middle of the VOB, a time entry for facilitating access is recorded.

FIG. 12 shows an example of the relationship between time entries and VOBU entries described later. This time entry has VOBU_ENTN, TM_DIFF, VOB
U_ADR is recorded. In VOBU_ENTN, the numbers of neighboring VOBU entries are recorded. TM_
In DIFF, the time difference from the VOBU entry indicated by VOBU_ENTN to the time unit boundary is recorded. VOBU_ADR has V near the time entry.
The address of OBU is recorded. VOBU_SZ and VOBU_PB_TM are recorded in the VOBU entry. The size of the VOBU is recorded in VOBU_SZ. The reproduction time of the VOBU is recorded in VOBU_PB_TM. The relationship between VOBU_ADR and VOBU_SZ in each time entry is as shown.

Returning to the explanation of step # 1101 again. The variable k is calculated by the following formula, and C_V_S_PTM and the kth time entry in the vicinity are determined. TMU x (k-1) ≤ R_PTM ≤ TMU
× k

Step # 1102: VOBU_ENTN, TM_DIFF, and VOB from the kth time entry
Obtain U_ADR and store in memory.

Step # 1103: Time difference TMU_DI from kth time entry to C_V_S_PTM
Find FF. TMU_DIFF = R_PTM- (TMUx
(K-1) -TM_DIFF)

Step # 1104: Initialize the following variables. SUM_TM = 0 SUM_SZ = 0 VOBU_ENT_PTR = VOBU_ENTN SUM_TM is a variable for storing the accumulated playback time, and S
UM_SZ is a variable for storing the integrated VOBU size, and VOBU_ENT_PTR is a variable for storing VOBU_ENTN.

Step # 1105: VOBU_ENT_
From the VOBU entry indicated by PTR, VOBU_S
Z and VOBU_PB are read and recorded in memory. V
The OBU entry is composed of VOBU_SZ and VOBU_SZ. The size of the VOBU is recorded in VOBU_SZ, and the reproduction time of the VOBU is recorded in VOBU_PB.

Step # 1106: SU is calculated by the following formula.
Add M_TM. SUM_TM = SUM_TM + VOBU_PB
_TM Step # 1107: SUM_TM is TMU_DIFF
Determine if greater than. SUM_TM is TMU_DI
If it is larger than FF, the process proceeds to step # 1110. That is, SUM_SZ at the time when SUM_TM becomes larger than TMU_DIFF, and VOB recorded in the memory.
The sum of U_ADR is the starting point address of the VOBU to be extracted. When SUM_TM is not larger than TMU_DIFF, the process proceeds to step # 1108.

Step # 1108: SU is calculated by the following equation.
Add M_SZ. SUM_SZ = SUM_SZ + VOBU_SZ

Step # 1109: VO is calculated by the following equation.
Prepare to read the next VOBU entry by adding BU_ENT_PTR. VOBU_ENT_PTR = VOBU_ENT_P
TR + 1 Then, the process returns to step # 1107.

Step # 1110: The starting point address of the VOBU to be extracted is calculated by the following formula. VOBU_START_ADR = VOBU_ADR
+ SUM_SZ This VOBU_START_ADR becomes the starting point address of the copy target.

FIG. 13 shows a flow chart for obtaining the address of the VOBU at the duplication end point in the duplication target VOB.
The steps of FIG. 13 are as follows. VO at the replication start point
Similar to the calculation of the BU address, the following processing is all performed by the copy control unit 103. In the following steps,
# 13 which is the same step as the flowchart in
The description of 02 to step # 1309 is omitted.

Step # 1300: First, the relative display time (R_PT) from the beginning of the target VOB to the cell reproduction end time.
M) is calculated by the following formula. R_PTM = C_V_E_PTM-VOB_V
_S_PTM VOB_V_S_PTM is the playback start time of the VOB. VOB_V_S_PTM is M_V stored in memory
From OBI_SRPN to VR_MANGR. It can be obtained by accessing the VOB information to be copied in the IFO file.

Step # 1301: C_V_E_PTM
And search for time entries in the vicinity. The variable k is calculated by the following equation, and C_V_E_PTM and the kth time entry in the vicinity are determined. TMU x (k-1) ≤ R_PTM ≤ TMU
× k

Step # 1310: The end address of the VOBU to be extracted is calculated by the following formula. VOBU_END_ADR = VOBU_ADR +
SUM_SZ This VOBU_END_ADR is the end point address of the copy target.

As described above, it is possible to obtain the addresses of the VOBUs of the copy start point and the copy end point in the copy target VOB. Therefore, in step # 607, the multiplexed bitstream of the address range portion is transferred from the hard disk to the DVD-
It can be duplicated in RAM.

According to the first embodiment described above, only the multiplexed bitstream of the portion selected in the play list can be copied to the DVD-RAM according to the play list instruction. In addition, since copying can be performed without decoding and re-encoding, it is possible to reduce the processing amount and processing time of copying.

Referring to FIG. 14, FIG. 15 and FIG.
As an embodiment of the present invention, a process of copying the multiplexed bitstream to the DVD-RAM which is the copy destination by changing the recording order of the multiplexed bitstream which is recorded on the hard disk which is the copy source will be described. The second embodiment is different from the first embodiment in that the time information conversion process is added in step # 607 described above, but in other points, the same contents as in the first embodiment are executed.

As shown in FIG. 15, the packs constituting the VOBU include SCR1501, PTS1502,
Time information such as DTS1503 is sequentially added. Therefore, as shown in FIG. 14, for example, VOBU # m + n + 1 to VOBU # m + n + 2 recorded in the first half of VOB # 3 in the duplication source hard disk are recorded in the second half of VOB # 1 in the DVD-RAM as the duplication destination.
OVO # k-4 to VOBU # k-3 are recorded on the original hard disk, and VOBU # m + n + 5 to VOBU # m + n + k recorded on the latter half of VOB # 3 in the duplication source hard disk are VOB # 1 to the duplication destination DVD-RAM. If VOBU # 1 to VOBU # k-5, which is the first half of the above, is recorded, the VOBU recorded in the DVD-RAM that is the copy destination, that is, the time information of the multiplexed bitstream will be inconsistent. Therefore, there is a possibility that the multiplexed bitstream copied to the DVD-RAM cannot be normally decoded and reproduced. When the positional relationship of the VOBU does not change as in the first embodiment shown in FIG. 7, it is not necessary to change the time information, but in the case of the second embodiment shown in FIG. 14, the front and rear positional relationships change. Therefore, it is necessary to rewrite the time information and then duplicate the multiplexed bitstream.

FIG. 15 shows the logical structure of a pack in the multiplexed bitstream. An SCR 1501 indicating the input time to the buffer is added to the pack header at the head of the pack. In addition, PTS1503, D is added to each packet header.
TS1504 is added. By re-adding the SCR 1501, PTS 1503, and DTS 1504 in the order of time series of the copy destination, the reproduction order of the time information and the multiplexed bit stream matches. Note that, as described above, a pack assembly from a pack having a system header to a pack immediately before the pack having the next system header is a VOBU.

FIG. 16 shows an example of the time information conversion processing of SCR, PTS and DTS. For example, when the VOBU placed in the latter half of the copy source is placed in the first half of the copy destination, the first SCR 1601 of the VOBU recorded in the DVD-RAM as the copy destination is set to 0 from x. The SCRs 1602 of the subsequent packs hold the difference from the previous pack as the offset value x, and the SCR value x + a to the offset value x
The SCR value a can be newly added by subtracting. The same applies to the PTS 1603 and DTS 1604. On the contrary, when the VOBU arranged at the first half of the copy destination is arranged at the latter half, the offset value may be added. The above processing is performed by the file generation unit 102 in response to an instruction from the copy control unit 103. The compression coded is d
The data 1505 is the only data, and the pack header including the SCR 1501 and the packet header including the PTS 1503 and the DTS 1504 are not compression-encoded. Therefore, in the present embodiment as well, the decoding and re-compression encoding are not performed. There is no change in that a multiplexed bitstream corresponding to a playlist can be duplicated.

As described above, in the second embodiment,
In addition to the same effect as the first embodiment, since the multiplexed bitstream can be recorded in the reproduction destination in the order of reproduction,
It is possible to reduce the time required for seeking when reproducing the recorded VOBU.

The first and second embodiments described above are general-purpose duplication devices from a hard disk to a DVD-RAM disc. However, even if the duplication source is a DVD-RAM and the duplication destination is a hard disc, similar copying is realized. it can. In addition to the hard disk and the DVD-RAM, the same operation is possible as long as the read / write disk devices and the optical disks have the same logical structure as the playlist. For example, it can be applied to DVD-RW, DVD-R and the like.

A third embodiment of the present invention will be described.
In the third embodiment, of the multiplexed bit stream of the recording DVD system recorded on the hard disk, only the portion shown in the playlist is left on the hard disk, and the other multiplexed bit stream is deleted to delete the data on the hard disk. It is a device that can edit a multiplexed bitstream.

FIG. 17 shows a block diagram of the third embodiment. The device of the third embodiment is a hard disk drive 1
701, file generation unit 1702, disk editing unit 17
03 and user I / F 1704. The file generator 1702 and the disk editor 1703 are IC, L
The file generation unit 1702 and the copy control unit 1703 may be integrated in one circuit, or may be present as separate circuits.

The disk editing unit 1703 uses the user I / F.
When a hard disk edit request is received from the hard disk drive 1704, VR_MANGR. The hard disk drive 1701 is controlled to read the IFO file.

The disc editor 1703 reads the read V
R_MANGR. User I / F 17 from IFO file
The play list number designated by 04 is searched, the address start point and the address end point of the range of the multiplexed bit stream left on the hard disk are detected, and the hard disk drive 1701 is controlled so as to protect the range. Note that the operation of detecting the address range of the multiplexed bitstream corresponding to the playlist can be realized by the same operation as in the first embodiment.

The disc editor 1703 reads the read V
R_MANGR. User I / F 15 from IFO file
Edited VR according to the playlist specified by 04
_MANGR. An IFO file is generated and transferred to the hard disk drive 1701. Disk editor 170
3 controls the hard disk drive 1701 to delete the multiplexed bitstream outside the range protected by the playlist from the hard disk.

The file generating section 1702 controls the hard disk drive 1701 to read the protected multiplexed bitstream, and outputs VR_MOVIE. A VRO file is generated and transferred to the hard disk drive 1701. The hard disk drive 1701 uses the transferred VR_MO.
VIE. Record the VRO file on the hard disk.

When there is an instruction from the disk editor 1703 to change the time information in the multiplexed bitstream in the hard disk, the file generator 1702 rewrites the time information in the multiplexed bitstream in the hard disk. VR_MOVIE. A VRO file is generated and transferred to the hard disk drive 1701.

As described above, in the third embodiment,
Only by selecting the playlist, it is possible to leave only the multiplexed bitstream of the part selected in the playlist on the hard disk from the multiplexed bitstream in the hard disk. It is also possible to re-record the multiplexed bitstream in the reproduction order of the playlist on the hard disk by using the second embodiment.

Although the hard disk has been described in the third embodiment, the same operation can be performed for editing the multiplexed bit stream in the DVD-RAM and the DVD-RW. That is, the same operation is possible with a read / write disk device and an optical disk having the same logical structure as the playlist.

[0105]

According to the present invention, the compression coded data corresponding to the selection information can be duplicated. Further, since the original compressed and encoded data can be duplicated or edited without performing decoding and recompression encoding processing, the processing amount and processing time required for duplication can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram of a duplication device according to a first embodiment.

FIG. 2 is an explanatory diagram showing the concept of playlist reproduction.

FIG. 3 is a diagram showing a logical structure of copy source data and copy destination data.

FIG. 4 shows VR_MOVIE. It is a figure which shows the logical structure of a VRO file.

FIG. 5 shows VR_MANGR. It is a figure which shows the logical structure of an IFO file.

FIG. 6 is a diagram showing a flowchart of the entire copying operation.

[Fig. 7] Fig. 7 is a diagram showing a case where a multiplexed bitstream corresponding to a playlist in the recording DVD system is newly copied by V.
R_MOVIE. It is a conceptual diagram which shows the process in which a VRO file is produced | generated.

[Fig. 8] Fig. 8 is a diagram showing a case where a multiplexed bitstream corresponding to a playlist in the recording DVD system is newly copied by V.
R_MANGR. It is a conceptual diagram which shows the process in which an IFO file is produced | generated.

FIG. 9 is a diagram showing a newly added V in the duplication of a multiplexed bitstream corresponding to a playlist in the recording DVD system.
R_MANGR. It is a conceptual diagram which shows the process in which an IFO file is produced | generated.

FIG. 10 is a diagram showing a flowchart for obtaining copy target VOB information, copy start time, and copy end time.

FIG. 11 is a diagram showing a flowchart for obtaining an address of a VOBU as a replication start point in a replication target VOB.

FIG. 12 is a diagram showing an example of a relationship between a time entry and a VOBU entry.

FIG. 13 shows a flowchart for obtaining the address of the VOBU at the replication end point in the replication target VOB.

[Fig. 14] Fig. 14 is a diagram showing a newly created VR_MOVIE. It is a conceptual diagram which shows the process in which a VRO file is produced | generated.

FIG. 15 is a diagram showing a logical structure of a pack in a multiplexed bitstream.

FIG. 16 is an explanatory diagram of time information conversion of SCR, PTS, and DTS.

FIG. 17 is a block diagram of an editing apparatus according to a third embodiment.

[Explanation of symbols]

101, 1701 ... Hard disk drive, 102 ...
File generation unit 103 ... Replication control unit 104, 170
4 ... DVD-RAM drive, 105, 1705 ... User I / F, 1703 ... Disc editing unit.

─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. ⁷ Identification Code FI Theme Coat (Reference) G11B 27/034 H04N 5/91 P H04N 5/85 5/92 H 5/92 G11B 27/02 K (72 ) Inventor Yukitoshi Tsuboi 3-16-16 Shinmachi, Ome-shi, Tokyo F-Term in Device Development Center, Hitachi, Ltd. (Reference) 5C052 AA01 AB09 DD04 5C053 FA15 FA23 GB05 GB38 5D044 AB05 AB07 BC01 BC06 CC04 CC09 DE03 DE12 DE24 DE54 DE96 GK08 GK12 HL07 HL16 5D110 AA13 AA17 AA27 AA29 CA05 CA06 CA42 CB04 DA04

Claims (8)

[Claims] 1. One of the compression-encoded data from a first recording medium on which compression-encoded data and selection information for selecting decoding and reproduction of a part of the compression-encoded data are recorded. A method of copying compressed coded data for reading a copy and copying the read compressed coded data to a second recording medium, wherein a start point and an end point of the compressed coded data selected by the selection information are obtained, To the end point are read from the first recording medium, and the read compression encoded data is copied to the second recording medium. 2. When the reproduction order of the compression encoded data selected by the selection information is different from the recording order recorded on the first recording medium, the time information of the compression encoded data is converted. 2. The compression-encoded data duplication method according to claim 1, wherein the compression-encoded data is duplicated on the second recording medium so that the reproduction order and the recording order match. 3. The compression-encoded data copying method according to claim 1, wherein the selection information is read from the first recording medium and copied to the second recording medium. 4. One of the compression-encoded data from a first recording medium on which compression-encoded data and selection information for selecting decoding and reproduction of a part of the compression-encoded data are recorded. A compression-encoded data duplicating device that reads a section and duplicates the read compression-encoded data onto a second recording medium, wherein a start point and an end point of the compression-encoded data selected by the selection information are obtained, and the start point To the end point, the compressed coded data is read from the first recording medium, and the read compressed coded data is copied to the second recording medium. . 5. When the reproduction order of the compression encoded data selected by the selection information is different from the recording order recorded in the first recording medium, the time information of the compression encoding data is converted. 5. The compression-encoded data duplicating apparatus according to claim 4, wherein the compression-encoded data is duplicated on the second recording medium so that the recording order matches the reproduction order. 6. The compression-encoded data duplicating apparatus according to claim 1, wherein the selection information is read from the first recording medium and duplicated in the second recording medium. 7. The compression-encoded data on a first recording medium on which compression-encoded data and selection information for selecting decoding and reproduction of a part of the compression-encoded data are recorded. A compressed coded data editing method for editing, wherein a start point and an end point of the compressed coded data selected by the selection information are obtained, and compressed coded data other than the compressed coded data from the start point to the end point is deleted. A method for editing compressed coded data, comprising: 8. The compression-encoded data on a first recording medium in which compression-encoded data and selection information for selecting decoding and reproduction of a part of the compression-encoded data are recorded. A compressed coded data editing device for editing, wherein a start point and an end point of the compressed coded data selected by the selection information are obtained, and compressed coded data other than the compressed coded data from the start point to the end point is deleted. A compression-encoded data editing device having the above structure.