JP2010225266A - Reproducing method using entry point, and recording and reproducing device using the method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To give an entry point to stream objects (ESOB types A, B) of different types. <P>SOLUTION: An information storage medium is used which has a region in which ESOB types A, B are recorded and a region in which HDVR_MG (or VMG) managing the ESOB types A, B is recorded. HDVR_MG includes identification information (SFI_ID/C_TY) distinguishing whether management object of HDVR_MG is ESOB type A or B. The HDVR_MG is read from this information recording medium, when content of identification information (SFI_ID/D_TY) indicates ESOB type A, the entry point is registered at a prescribed reproducing time (L minutes interval), and when content of identification information (SFI_ID/D_TY) indicates ESOB type B, the entry point is registered at a prescribed packet arrival time (L minutes interval). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an entry point registration method used in an apparatus for recording and reproducing a digital stream signal such as digital TV broadcast.

  In recent years, TV broadcasting has entered the era of digital broadcasting in which high-definition programs (high-definition AV information programs) are the main broadcast contents. MPEG2 transport streams (hereinafter abbreviated as MPEG-TS as appropriate) are employed in satellite digital TV broadcasts and terrestrial digital TV broadcasts currently being implemented. In the field of digital broadcasting using moving images, MPEG-TS will continue to be used as standard. With the start of such digital TV broadcasting, the market needs of streamers capable of recording digital TV broadcast content as they are (on a hard disk and / or optical disk) are increasing.

  As an example of a streamer using an optical disk such as a DVD-RAM, there is a “recording / reproducing apparatus” disclosed in Patent Document 1. In addition, as an example of attaching an entry point to an object that is not a streamer but is digitally recorded (a video object obtained by encoding an analog AV signal into MPEG2-PS), “Digital Video Information Medium, Digital Video information recording / reproducing apparatus and digital video information processing method ".

JP 2002-84479 A JP 2000-322875 A

  There are two types of stream objects that record digital broadcasting (MPEG-TS): a type managed on a playback time basis and a type managed on a packet arrival time basis. I can't find any prior art that provides entry points.

  One of the problems of the present invention is to provide entry points for stream objects that can have different types.

  In one embodiment of the present invention, a type A stream object (ESOB type A) recorded in the type A recording mode managed by the reproduction time and a type B recorded in the type B recording mode managed by the packet arrival time. A stream object recording area (133 in FIG. 1) for recording at least one of the stream objects (ESOB type B) using a packet, and recorded contents (ESOB type A / ESOB type B) in the stream object recording area Using an information storage medium (100 in FIG. 1 or HDD 100a in FIG. 7) having a management information recording area (130 in FIG. 1) for recording management information (HDVR_MG in FIG. 4), the stream object recording area Recorded content (ESOB type A / ESOB tie Entry point (Fig. 17 B), and the like EPn in FIG. 18) is registered.

  In the entry point registration method according to an embodiment of the present invention, the management information (HDVR_MG in FIG. 4) is identification information for distinguishing whether the management target is the type A recording mode or the type B recording mode. (SFI_ID in FIG. 4 or C_TY in FIG. 5). In this case, when the management information (HDVR_MG or VMG) is read from the information storage medium (ST1100 in FIG. 19), and the content of the identification information (SFI_ID or C_TY) included in the management information indicates the type A recording mode (ST1106 = Type A) Entry points are registered at predetermined playback times (L minute intervals) (ST1112A to ST1116A), and the content of the identification information (SFI_ID or C_TY) included in the management information is the type B recording mode. (ST1106 = Type B) Entry points are registered at a predetermined packet arrival time (L minute intervals) (ST1112B to ST1116B).

  Entry points can be attached in a manner adapted to the type of recorded stream.

The figure explaining the data structure which concerns on one embodiment of this invention. The figure explaining the relationship between the reproduction | regeneration management information layer in the data structure which concerns on one embodiment of this invention, an object management information layer, and an object layer. The figure explaining the file structure concerning one embodiment of this invention. The figure explaining an example of how stream file information (ESTR_FIT) and PGC information (EX_ORG_PGCI, EX_UD_PGCIT) included in a VMG file (HDVR_MG) are configured. The figure explaining the specific example of EX_CI. The figure explaining the specific example of C_EPI. The block diagram explaining an example of the apparatus which records and reproduces AV information (digital TV broadcast program etc.) on an information recording medium (optical disc, hard disk, etc.) using the data structure which concerns on one embodiment of this invention. The flowchart figure explaining an example of operation | movement of the whole apparatus. The flowchart figure explaining an example of an edit process (ST28). The flowchart figure explaining an example of whole reproduction | regeneration operation | movement. The flowchart figure explaining an example of EVOB reproduction | regeneration operation | movement. The flowchart figure explaining an example of ESOB reproduction | regeneration operation | movement. The flowchart figure explaining an example of AT_SOB reproduction | regeneration operation | movement. The flowchart figure explaining an example of the process at the time of cell reproduction | regeneration. The flowchart figure explaining an example of an entry point menu display process. The figure explaining the example of a menu display of the title with the entry point. The figure explaining an example of how to attach an entry point (in the case of type A). The figure explaining the other example of how to attach an entry point (in the case of type B). The flowchart figure explaining an example of entry point automatic generation processing. The figure explaining an example of how the stream file information (ESTR_FIT) is structured.

  Hereinafter, various embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram for explaining a data structure according to an embodiment of the present invention. As a typical example of a recordable or re-writable information recording medium, a DVD disk (a DVD ± R, DVD having a single recording layer or a plurality of recording layers using a red laser having a wavelength of about 650 nm or a blue-violet or blue laser having a wavelength of 405 nm or less) ± RW, DVD-RAM, etc.) 100. As shown in FIG. 1, the disk 100 includes a volume / file structure information area 111 containing a file system and a data area 112 for actually recording a data file. The file system includes information indicating which file is recorded where.

  The data area 112 includes areas 120 and 122 for recording by a general computer and an area 121 for recording AV data. In the AV data recording area 121, an AV data management information area 130 having a video manager (VMG) file for managing AV data and an object data file conforming to the DVD-Video (ROM Video) standard are recorded. ROM_Video object group recording area 131, VR object group recording area 132 where object data (EVOBS: Extended Video Object Set) file (VRO file) conforming to the video recording (VR) standard is recorded, and digital broadcasting It includes a recording area 133 in which stream object data (ESOBS: Extended Stream Object Set) files (SRO files) in which objects are recorded are recorded. Note that the recording standard for the SRO file is appropriately described as a stream recording (SR) standard.

  Here, a DVD-Video (ROM Video) is a video title set (VIDEO-TS), a recording / playback DVD (DVD-RTR) is a DVD-RTAV, and the file directory is divided for each format. A new DVD standard file compatible with digital broadcasting to be described is stored in a directory called DVD_HDVR, for example (described later with reference to FIG. 3). That is, a VMG file for managing data, a VRO that is an object file for analog recording such as analog broadcasting and line input, and an SRO file that is an object of digital broadcasting are recorded in a directory called DVD_HDVR. The file becomes ESOBS.

  In the configuration of FIG. 1, one ESOBU 143 is composed of one or more packet groups 147. Each Packet Group 147 corresponds to, for example, 16 (or 32) packs (1 pack = 1 Logical Block: 2048 bytes), and each Packet Group 147 includes a Packet Group Header 161 and a plurality of TS packets 163 (170 packets). . The arrival time (Arrival Time) of each TS packet can be represented by a PATS (Packet Arrival Time Stamp: 4 bytes) 162 arranged before each TS packet. Although not shown in the figure, the Header_ID (0x00000FA5) is set in the Packet Group Header 161 arranged at the head of the Packet Group 147, and then packet group general information PKT_GRP_GI, copy management information CCI (Copy Control Information) or CPI (Contents Protection Information) , And manufacturer information MNI or MNFI (Manufacturer's information).

  Here, the arrival time of the TS packet must be set to 0 (or a predetermined value) at the start of recording and linearly counted up until the end of recording. However, STC (System Time Counter) and PATS do not always show the same value (because of differences in initial values). However, it is necessary to synchronize the count interval of the PATS counter with the count interval of the STC counter corresponding to the interval between the PCR (Program Clock Reference) capture and the next PCR capture in a state where the reproduction synchronization is matched. is there. The PCR is included in an adaptation field (not shown) in the MPEG-TS. In addition, the Packet Group is permitted to include up to two ESOBs. That is, it is not necessary to align the Packet Group for each ESOB.

  The lower 4 bytes unique to each PATS are included in each PATS (packet arrival time information field), but the upper 2 bytes of the head PATS are in the packet group general information (PKT_GRP_GI) (not shown) in the Packet Group Header 161. Are included in FIRST_PATS_EXT. As a result, the amount of data can be reduced as compared to the case where a 6-byte packet arrival time is individually described in each PATS.

  Although not shown, PKT_GRP_GI is packet type PKT_GRP_TY (1 = MPEG-TS), Packet Group version number VERSION, Packet Group status information PKT_GRP_SS, number of valid packets Valid_PKT_Ns, upper 2 bytes of PATS for the first packet It consists of FIRST_PATS_EXT.

  Further, PKT_GRP_SS includes a bit STUF indicating whether stuffing has been performed (when this STUF bit is set, Valid_PKT_Ns indicates a value other than 0xAA) and PATS_SS. . Here, PATS_SS is a value indicating the accuracy of PATS (for example, when PATS_SS is 00, both PATS and FIRST_PATS_EXT are valid and the accuracy is 6 bytes; when PATS_SS is 01, only PATS is valid and the accuracy is 4 bytes. When PATS_SS is 10, both PATS and FIRST_PATS_EXT are invalid and there is no accuracy).

  The PATS extension byte FIRST_PATS_EXT of the first packet is composed of, for example, the upper 2 bytes of the arrival time of the packet at the head of the Packet Group, and the lower 4 bytes are attached to the front of each packet. As a result, more accurate time reproduction processing is possible.

  In Packet Group Header 161, there is a description location of CP_CTL_INFO (not shown) (copy control information: abbreviated as CCI or CPI as appropriate). CP_CTL_INFO is in the CCI (or CPI) of the Packet Group Header 161, and copy control of each Packet Group is performed in the Packet Group Header 161. The CCI (or CPI) value is set by a digital copy control descriptor and a content use descriptor. The contents are, for example, CGMS (0 = prohibited, 1 = unlimited allowed), APS (0 = no APS, 1 = APS type 1 added, 2 = APS type 2 added, 3 = APS type 3 added), EPN ( 0 = content protection (Internet output protection), 1 = no content protection) and ICT (0 = resolution limit, 1 = no limit).

  Alternatively, CCI (or CPI) includes digital copy control (00 = copy prohibited, 01 = 1 copy permitted, 11 = copy prohibited) and analog copy control (00 = no APS, 01 = APS type 1, 10 = APS) Type 2, 11 = APS type 3), EPN (0 = content protection, 1 = no content protection) and ICT (0 = analog video output resolution limitation, 1 = no limitation). Here, APS stands for Analog Protection System, and Macrovision (registered trademark) is assumed in this embodiment.

  Also, copy control information (CCI or CPI) is placed on the management information side (ESOBI_GI) and copy management (copyright management) is performed as a whole, or both CCI (or CPI) is managed on the management information side and object side (Packet Group) It is also possible to perform copy management (copyright management) in two stages, management information and object, with the object side (Packet Group) having priority. Specifically, the ESOBI_GI CCI is used in the title menu, and the packet group can be preferentially processed in the actual device operation.

  FIG. 2 is a diagram for explaining the relationship among the reproduction management information layer, the object management information layer, and the object layer in the data structure according to the embodiment of the present invention. As shown in FIG. 2, the SR management data is recorded in a file common to the VR, the SR is controlled in common with the VR, the SR and the VR are linked in units of cells, and the playback location is specified in units of playback time. It is specified. This management data is HR_MANGER. It is called IFO (described later with reference to FIG. 3).

The structure of ESOBS is composed of one or more ESOBs 141, and each ESOB corresponds to one TV broadcast program, for example. The ESOB is composed of one or more ESOBUs (Extended Stream object units), and the ESOBU corresponds to object data for one fixed time interval (which varies depending on the value of ESOBU_PB_TM_RNG (not shown)) or one or more GOP data. (Note that ESOBU_PB_TM_RNG is included in time map information ESOB_TMAPI (not shown) in ESOBI in FIG. 4).
However, if the transfer rate is low, 1 GOP may not be sent within 1 s (1 second). (In VR, since GOP is internal encoding, GOP can be set freely. However, in the case of digital broadcasting, encoding is a broadcasting station. , It may be unclear what data is coming). In that case, 1STREF_SZ = 0 is set so as to indicate that there is no reference picture in the divided ESOBU. In this case, an ESOBU that cannot be used for random access is created. For this reason, ESOBU including the head of a randomly accessible picture is distinguished as entry ESOBU (ESOBU_ENT). Note that the 1STREF_SZ information field is provided in ESOBU_ENT (described later with reference to FIG. 20) in the stream time map (ESTMAP) included in the stream file information table (ESTR_FIT).

  In addition, there may be a case where the transfer rate is high and I pictures are frequently sent. In that case, the ESOBU is frequently divided, and accordingly, the management information of the ESOBU is increased, and there is a possibility that the entire management information is enlarged. Therefore, it is appropriate to divide the ESOBU (other than the last ESOBU) by a fixed time interval (for example, every 1 s: delimiter is a picture unit) determined by the total recording time or one or more GOPs.

  Here, the management information will be described with reference to FIGS. FIG. 3 is a diagram for explaining an example of the file structure according to the embodiment of the present invention. In this example, EVOB and ESOB are managed in a hierarchical directory. This facilitates management for each object, and even when data is converted into HD_DVD-VIDEO, only the HDVR_VOB directory can be targeted.

  Here, the directory HR_MANGER. An IFO (VMG file) is placed, and an EVOB OBJECT file: HR_MOVIE. TMAP file for each VRO and EVOB: HR_Vmmmm. MAP (mmmm is the same number as VOB_INDEX: 1 to 1998) is placed. HDVR_SOB includes an ESOB OBJECT file: HR_STRnn. SRO and ESOB (AT_SOB) management file: HR_SFInn. SFI: (TYPE_B in the case of nn = 00, TYPE_A in the case of nn = 01 to 0xff), and TMAP file for each ESOB (AT_SOB): Snn_mmmm. SMP: (TYPE_B when nn = 00, TYPE_A when nn = 01 to 0xff, mmmm is the same number as ESOB (AT_SOB) _INDEX: 1 to 1998). In this case, in order to improve the affinity with HD_DVD-VIDEO, it is conceivable to make the VTMAP structure common.

  By the way, in a method for broadcasting (distributing) compressed moving images such as digital TV broadcasts and broadcasts using wired lines such as the Internet, the MPEG-TS method, which is a common basic format, has a packet management data portion and a payload. Divided into The payload includes data to be reproduced in a scrambled state. According to ARIB, PAT (Program Association Table), PMT (Program Map Table), and SI (Service Information) are not scrambled. Various management information is created using PMT and SI (Service Description Table, EIT: Event Information Table, BAT: Bouquet association Table).

  Reproduction targets include MPEG video data, MPEG audio data, data broadcast data, and the like (information such as program information) such as PAT, PMT, and SI that are not directly related to the reproduction target but are necessary for reproduction. There is. The PAT includes a PID (Packet Identification) of the PMT for each program, and further, PIDs of video data and audio data are recorded in the PMT.

  For example, normal playback procedures for STB (Set Top Box) include the following. That is, when a user determines a program from an electronic program guide (EPG information) or the like, the PAT is read at the start time of the target program, and the PID of the PMT belonging to the desired program is determined based on the read data. The target PMT is read, and the PIDs of the video and audio packets to be reproduced included therein are determined. Then, the video and audio attributes are read by the PMT and / or SI, the read attributes are set in the video and audio decoders, and the video and audio data are cut out according to the PID and reproduced. Here, since PAT, PMT, SI, and the like are also used for channel switching (so that a video appears immediately after switching the channel), they are transmitted every several hundreds of milliseconds.

  However, one-segment broadcasting is currently being performed for mobile broadcasting. Here, there is no PAT, only NIT (Network Information Table) and PMT. The PMT is determined in advance by the service number described in the NIT, and the PMT is determined according to this service number.

  Further, when digital broadcasting is transmitted from a tuner to a recording device such as a streamer and recorded, only object data of a target program is selected and recorded. This format is called partial TS. In this case, the PAT and / or the PMT are re-edited according to the target program, and a SIT (Selection Information Table) and a DIT (Discontinuity information Table) are further added. The SIT is created based on information such as EIT (Event Information Table) in the broadcast, and is inserted at the same timing as the EIT. The DIT is inserted at a location where the bit stream is discontinuous. The DIT is inserted as a set of 2TS packets. Thereby, it can be determined whether the content is discontinuous.

  Currently, DVD recorders are in widespread use and are replacing the demand for VTRs. A characteristic function of the DVD recorder is a chapter (entry point) automatic generation function. This function is implemented by most DVD recorders, and is a function that allows entry points to be placed at regular intervals (automatic chapter division) and skipped playback.

  Also, digital broadcasting has become widespread, and in the future, analog broadcasting is about to switch to digital broadcasting. Therefore, in the embodiment of the present invention, when chapters are automatically created in analog broadcasting as well as in digital broadcasting, a method of entering entry points corresponding to digital broadcasting is proposed. It is also proposed to change the playback process (output method) by looking at the cell type C_TYPE (CELL_TYPE) for each cell that is a playback unit of the DVD.

  Here, when a digital broadcast program is recorded on a high-speed disk medium such as an HDD or an HD_DVD-RAM, it is advantageous to record the broadcast stream data as it is as digital data. Therefore, the HD DVD-VR standard was born. In this standard, unlike the conventional VR (video recording) format, ESR (extended stream recording) as a format for recording a stream as it is is merged with VR. As a result, the HD DVD-VR standard is a standard corresponding to digital broadcasting while utilizing VR assets.

  By the way, digital broadcasting has a different broadcasting system for each country. For example, DVB (Digital Video Broadcasting) in Europe, ATSC (Advanced Television Systems Committee) in the United States, and ARIB (Association of Radio Industries and BuSInesses) in Japan.

  In DVB, the video is MPEG2, but the resolution is 1152 * 1440i, 1080 * 1920 (i, p), 1035 * 1920, 720 * 1280, (576, 480) * (720, 544, 480, 352), ( 288, 240) * 352, the frame frequency is 30Hz and 25Hz, the audio is MPEG-1 audio and MPEG-2 Audio, and the sampling frequency is 32kHz, 44.1kHz and 48kHz.

  In ATSC, the video is MPEG2, but the resolution is 1080 * 1920 (i, p), 720 * 1280p, 480 * 704 (i, p), 480 * 640 (i, p), and the frame frequency is 23.976Hz, 24Hz, 29.97Hz, 30Hz, 59.94Hz, 60Hz, audio is MPEG1 Audio Layer 1 & 2 (DirecTV), AC3 Layer 1 & 2 (Primstar), sampling frequency is 48kHz, 44.1kHz, 32kHz.

  In ARIB, the video is MPEG2, the resolution is 1080i, 720p, 480i, 480p, the frame rate is 29.97Hz, 59.94Hz, the audio is AAC (MPEG-2 Advanced Audio Coding), and the sampling frequency is 48kHz, 44.1kHz, 32kHz 24kHz, 22.05kHz, 16kHz.

  In this way, the digital broadcasting system is different depending on the country, and there is a possibility that it differs depending on the broadcasting station. Therefore, in the recorder, it is necessary to record the object as one or a plurality of files according to the method used.

  Therefore, a file further added in the embodiment of the present invention to the current VR file structure is HR_SFInn. SFI and HR_SFInn. It is configured so that a plurality of “nn” can exist in the file name BUP. One or more files configured in this way are added for each broadcasting system.

  For example, when “nn” = 00, it can be used when the broadcasting system is unknown or the recorder does not support the broadcasting system. In this case, a stream whose broadcasting system is unknown or a stream whose broadcasting system is not compatible with the recorder can be stored as a type B stream (ESPB_STRB). Therefore, since ESTR_FI, which is management information for digital broadcasting, is changed for each broadcasting station (or for each broadcasting system), a plurality of ESTR_FIs can exist.

  Here, AT_SOBU (Arrival Time based SOBU) is defined as a basic unit of a type B stream (for example, a stream object including a packet arriving in one second: ESPB_STRB). When the management information is constructed based on the PATS when the stream cannot be analyzed, the AT_SOBU is divided by a time interval indicated by AT_SOBU_TM (Time Range of Arrival Time based SOBU). There are two types of AT_SOBU_TM: a case where the AT_SOBU_TM is specified in units of seconds and a case where the AT_SOBU_TM is specified using a 27 MHz count value. Although not shown, this AT_SOBU_TM is described as part of the type B time map information in the ESOBI of FIG.

  FIG. 4 is a diagram illustrating an example of how ESTR_FIT, EX_ORG_PGCI, and EX_UD_PGCIT (playlist information) included in HDVR_MG (VMG file) are configured. ESTR_FIT includes general information ESTR_FI_GI, one or more search pointers ESOBI_SRP # 1 to #n, and one or more ESOBI # 1 to #n. ESTR_FI_GI includes an identifier SFI_ID, an end address ESTR_FI_EA, version information VERN, a last modification time ESTR_FI_LAST_MOD_TM, a packet type PKT_TY, a packet size PKT_SZ, a packet group size PKT_GRP_SZ, and the number of packets P in one packet group P. The pointer number ESOBI_SRP_Ns is included.

  Here, SFI_ID is expressed as “HR_SFInn”, and becomes “HR_SFI00” in the type B recording mode. On the other hand, in the type A recording mode, “nn” of “HR_SFInn” takes any one value from 01 to FF. That is, whether the recorded ESOB is type A or type B can be identified based on whether or not “nn” of “HR_SFInn” is “00”.

  Furthermore, there are two types of EX_PGCI as reproduction information. Similar to the normal VR format, ORG_EX_PGCI (original program chain information) is automatically created by the recorder at the time of recording and set in the order of recording, and UD_EX_PGCIT is created according to the playback order added freely by the user and is called a playlist. The two PGCI formats are common at the EX_PGC level, and the EX_PGC format is shown in FIGS.

  FIG. 5 is a diagram for describing a specific example of cell information EX_CI included in EX_PGC information. In EX_CI, the types of ESOB and AT_SOB are added to the cell type C_TY. In EX_CI, a search pointer number ESOBI_SRPN, a cell start time C_S_PTM / C_S_PATS, a cell end time C_E_PTM / C_E_PATS, a default video ESOB_ESI number C_DEF_V_SOB_ESIN of the corresponding cell, and the like can be described. Here, the cell start time and the cell end time can be expressed by either a reproduction time (in the case of PTM base) or a packet arrival time (in the case of PATS base).

  Here, when the time designation is set to playback time = actual time at playback, the same access method as that of an existing DVD video recorder (DVD-VR) can be achieved while stream recording is performed by directly recording the transmitted bit stream. Become. Then, since the user can designate the recording location by the reproduction time, the user's desire is completely reflected. However, this method can be adopted when the contents of the stream can be sufficiently analyzed. When the contents of the recorded stream are not sufficiently understood, the stream packet (MPEG-TS packet in digital broadcast recording) It must be specified in units of transfer time.

  When the recording location is designated by the reproduction time in a state where the contents of the recorded stream are not sufficiently understood, reproduction cannot always be started from the head of the I picture. Therefore, when the playback start frame is not an I picture frame, decoding is started from the immediately preceding I picture, and display of the playback video is started when the target frame is decoded. By doing so, it is possible to make it appear to the user as if playback has started from the frame specified by the user.

  By the way, the ID to be referred to at the time of playback processing is designated by the method of setting the PID of the stream representing the stream to be played, the method of setting the ID of the component group in the case of multi-view TV, etc., and the ESI number (For example, there are a method of describing with 13-bit actual data, a method of describing the order in the PMT, or a method of describing the value of the component tag) . Further, a method of switching by entering a GRP number to be referred to (GRP_SRP number) is also conceivable.

  By attaching a unique ID number to the program (PG_INDEX corresponding to EX_PGI # p in FIG. 5, etc .: not shown), it is possible to specify a program or cell with a number that does not change even if an intermediate program or cell is deleted. I am doing so. In the cell information (EX_CI) of FIG. 5, the file number (ESTR_FIN) of the stream to be reproduced and the search pointer number ESOBI_SRPN of the corresponding ESOBI are set. Further, EX_CI is provided with cell entry point information C_EPI (Entry Point Information) corresponding to a chapter.

  The program information (EX_PGI # 1 to #p) included in the EX_PGC information of FIG. 5 stores date / time information (PG_LAST_MOD_TM) when the corresponding program is updated, although not shown. As a result, it is possible to know when the corresponding program was edited. Each EX_PGI has a field of primary text information (PRM_TXTI) for description of a program name and the like. Further, in order to store other text information, an item text (IT_TXT) area is provided in EX_TXTDT_MG in FIG. 4, and other information (director name, lead name, etc.) is stored therein. The EX_PGI is linked with the saved IT_TXT search pointer number, and the IT_TXT data is also set with a corresponding program number. Here, the program number is, for example, an absolute number from the beginning of recording on the disc 100 of FIG. 1, and is an index number (PG_INDEX) that does not change even if other programs are deleted.

  Further, in the EX_PGI, there is a resume information field (PG_RSM_MRKI) as in the playlist (present in the search pointer of the playlist), and a resume marker for each program (a marker indicating how far the program has been played when playback is interrupted). It is possible to describe. Although not shown, PG_RSM_MRKI is set with cell number CN, reproduction start point MRK_PT, and date / time information MRK_TM at which the marker is created as information for resuming reproduction. These are used as the title resume. In MRK_PT, a playback time PTM is described in a movie cell or a type A stream cell, and a packet arrival time PATS is described in a type B stream cell.

  Further, EX_PGI includes a program representative image information field (PG_REP_PICTI). In this PG_REP_PICTI, picture point PICT_PT, the number CN of a cell in which a picture point exists, and the like are described as representative image information (marker of an image displayed as a thumbnail in a title menu or the like) for each program. In the PICT_PT, the reproduction time PTM of the representative image is described in the movie cell or the type A stream cell, and the packet arrival time PATS of the representative image is described in the type B stream cell.

  FIG. 6 is a diagram illustrating a specific example of C_EPI. There are two types of C_EPI for each cell type, for a total of six types. M_CELL_EPI_TY_A is composed of the type of entry point information (EPI_TY) and the playback time (EP_PTM) where the entry point is attached. M_CELL_EPI_TY_B further includes PRM_TXTI (primary text information) in addition to EPI_TY and EP_PTM.

  STR_A_CELL_EPI_TY_A (for ESOB type A) is composed of the type of entry point information (EPI_TY) and the playback time (EP_PTM) where the entry point is attached. Further, STR_A_CELL_EPI_TY_B further includes PRM_TXTI (text information) in addition to EPI_TY and EP_PTM.

  STR_B_CELL_EPI_TY_A (for ESOB type B) is composed of the type of entry point information (EPI_TY) and the packet arrival time (EP_PATS) where the entry point is attached. STR_B_CELL_EPI_TY_B is configured to further include PRM_TXTI (text information) in addition to EPI_TY and EP_PATS.

  FIG. 7 illustrates an example of an apparatus for recording and reproducing AV information (digital TV broadcast program, etc.) on an information recording medium (optical disc, hard disk, etc.) using the data structure according to an embodiment of the present invention. It is a block diagram. As shown, the recording / playback apparatus includes an MPU unit 80, a display unit 104, a decoder unit 59, an encoder unit 79, a TV tuner unit 82, an STC unit 102, a D-PRO unit 52, a temporary storage unit 53, and a disk drive unit. 51, key input unit 103, video mixing unit 66, frame memory unit 73, TV D / A unit 67, terrestrial digital tuner unit 89, IEEE 1394 (and / or HDMI) I / F unit 74, Ethernet (registered trademark) An I / F unit (not shown), a remote control receiving unit 104, an STB unit (such as a BS digital tuner) 83, an emergency broadcast detection unit 83b, an HDD unit 100a, and the like are included. In this configuration, a streamer function is added to the recording / playback DVD recorder.

  The encoder unit 79 includes an A / D unit 84, a video encoding unit 87, an audio encoding unit 86, a sub-picture encoding unit (not shown), a formatter unit 90, a buffer memory unit 91, and the like. The decoder unit 59 includes a separation unit 60, a video decoding unit 61, a sub-picture decoding unit 63, an audio decoding unit 64, a TS packet transfer unit 101, a V-PRO unit 65, an audio D / A unit 70, and the like. ing. Further, the STB unit 83 is connected to an antenna 83a for receiving digital broadcasting. Note that the STC unit 102 is configured to count on a 27 MHz base.

  The signal flow during recording is as follows. That is, the TS packet data received by the STB unit 83 (or the terrestrial digital tuner 89) is packet-grouped by the formatter unit 90 and temporarily stored in the buffer memory unit 91. Record in 100a. The formatter unit 90 is connected to an internal counter 90a for PATS. The arrival time of the TS packet is counted by the PATS counter 90a, and the count value is added to the head of each TS packet and buffered by the buffer memory unit 91. This counter 90a synchronizes by finely adjusting the count interval by PCR (or SCR), but does not load the value of PCR (or SCR) unlike STC102.

  In this operation, when TS packets are received, 170 packets are grouped and a packet group header is created. In that case, only the upper 2 bytes of the PATS of the first Packet of the Packet Group are put in the header (FIRST_PATS_EXT), and only the lower 4 bytes of the other PATS are stored together with the TS packet (in the PATS before the TS packet). An analog signal input from the terrestrial tuner 82 or line input is digitally converted by the A / D unit 84. The digital signal is input to each encoding unit. That is, the video signal is input to the video encoding unit 87, the audio signal is input to the audio encoding unit 86, and character data such as text broadcast is input to a sub-picture encoding unit (not shown). Here, for example, the video signal is subjected to MPEG compression, the audio signal is subjected to MPEG audio compression, and the character data is subjected to run length compression.

  The output from each encoder unit (for VR) is packetized so that it becomes 2048 bytes when the compressed data is packed and input to the formatter unit 90. In the formatter unit 90, each packet is packed, further multiplexed as a program stream, and sent to the D-PRO unit 52.

  In the D-PRO unit 52, an ECC block is formed every 16 logical blocks, error correction data is attached, and recording is performed on the disk 100 (or on the HDD 100a) by the drive unit 51. Here, when the drive unit 51 is busy due to seeking or track jumping, the drive unit 51 is placed in the temporary storage unit 53 and waits until the drive unit 51 is ready. Further, the formatter unit 90 creates segmentation information during recording and periodically sends it to the MPU unit 80 (such as GOP head interrupt). The segmentation information includes the number of packs of EVOBU (ESOBU), the end address of a reference picture (I picture) from the beginning of EVOBU (ESOBU), the playback time of EVOBU (ESOBU), and the like.

  The signal flow during reproduction is read out from the disc 100 (or from the HDD 100a) by the drive unit 51, corrected by the D-PRO unit 52, and input to the decoder unit 59. The MPU unit 80 determines whether the input data is VR data or SR data (by the cell type in FIG. 5), and sets the type in the decoder unit 59 before reproduction. In the case of SR data, the MPU unit 80 determines the PID to be played based on the ESI number to be played, determines the PID of each item (video, audio, etc.) to be played back from the PMT, and sets it in the decoder unit 59. In the decoder unit 59, based on the PID, each TS packet is sent from the separation unit 60 to each decoding unit 61-64 and sent to the TS packet transfer unit 101, and the STB unit 83 (and IEEE 1394 I / F unit 74) according to the arrival time. ) In the form of TS packets. Each of the decoding units 61 to 64 performs decoding, converts the analog signal into a D / A unit 67, and displays it on the TV 68. In the case of VR data, the separation unit 60 sends the data to the decoding units 61 to 64 according to a fixed ID. Each of the decoding units 61 to 64 performs decoding, converts the analog signal into a D / A unit 67, and displays it on the TV 68.

  At the time of reproduction, the pack data read from the disc 100 and / or 100a is analyzed by the separation unit 60, and in the case of a pack containing TS packets, it is sent to the TS packet transfer unit 101. 61 to 64 for reproduction. When transferring to the STB unit 83 (or when transmitting to an external device such as a digital TV by IEEE1394 or the like), the TS packet transfer unit 101 transfers only the TS packet at the same time interval as when it arrived. The STB unit 83 performs decoding, generates an AV signal, and displays the AV signal on the TV 68 or the like through the video encoder unit in the streamer.

  The characteristics of the medium 100 (100a) used in the apparatus shown in FIG. 7 can be summarized as follows. That is, this medium is composed of a management area 130 and a data area 131. In the data area, data is divided into a plurality of object data (ESOB) and each object data is composed of a group of data units (ESOBU). Is done. One data unit (ESOBU) is composed of a packet group obtained by packetizing a digital broadcast signal conforming to MPEG-TS into a plurality of packets for each TS packet (see FIG. 1). On the other hand, the management area 130 has EX_PGC information (EX_PGCI) as information for managing the playback procedure, and this EX_PGC information includes cell information (EX_CI). Further, the management area 130 has information for managing object data (ESOB).

  The apparatus shown in FIG. 7 can perform stream recording on the medium 100 (100a) having the above data structure in addition to video recording. At this time, in order to extract the program map table PMT and the service information SI from the TS packet stream, the MPU unit 80 uses a service information extraction unit (not shown; firmware constituting a part of the management data creation unit 80B). Configured to have. An attribute information creation unit (not shown; part of the management data creation unit 80B) that creates attribute information (such as a PCR pack number or a PCR LB number number) based on the information extracted by the service information extraction unit. Configured to have firmware). The MPU unit 80 further includes firmware for performing entry point automatic generation processing, which will be described later with reference to FIG. 19, as an entry point processing unit 80C.

  FIG. 8 is a flowchart (overall operation processing flow) for explaining an example of the overall operation of the apparatus shown in FIG. There are five types of data processing here: recording processing, playback processing, data transfer processing (digital output processing to STB, etc.), program setting processing, and editing processing. For example, when the apparatus of FIG. 7 is turned on, the MPU unit 80 performs initial setting (at the time of factory shipment or after setting by the user) (ST10), and performs display setting (ST12). Then, it is checked whether the emergency broadcast flag and the reserved recording flag are set. If they are set (YES in ST13A), the program setting for reserved recording is performed, and the recording process is set to be performed at a predetermined time (ST13B). ). If the emergency broadcast flag and the scheduled recording flag are not set (NO in ST13A), it is checked whether or not the emergency broadcast recorded flag is set. If it is set (YES in ST13C), the user does nothing. In addition, emergency broadcast display processing is performed (ST13D). If the emergency broadcast recorded flag is not set (NO in ST13C), the process proceeds to a state of waiting for a user operation.

  When the user performs key input from the key input unit 103 or the remote controller 103a of FIG. 7 (ST14), the MPU unit 80 interprets the contents of the key input (ST16). Depending on the result of the input key interpretation, the following four data processes are executed as appropriate. That is, if the key input is, for example, a key operation for timer timer recording setting, program setting processing is entered (ST20). If the key input is a key operation for starting recording, the recording process is started (ST22). If the key input is a key operation for starting playback, playback processing is entered (ST24). If the key input is a key operation for digital output to the STB, digital output processing is started (ST26). If the key operation is an editing process, the editing process is started (ST28).

  The processing of ST20 to ST28 is appropriately performed in parallel for each task. For example, during the reproduction process (ST24), a process (ST26) for digital output to the STB is executed in parallel. Alternatively, a new program setting process (ST20) can be processed in parallel during the recording process (ST22) that is not timer reserved recording. Alternatively, the reproduction process (ST24) and the digital output process (ST26) can be performed in parallel during the recording process (ST22) by taking advantage of the high-speed accessible disk recording. It is also possible to perform a disk editing process (ST28) during recording on the HDD.

  FIG. 9 is a flowchart (edit operation process flow) for explaining an example of the edit process (ST28). Upon entering the editing process, five processes (any of A to E) can be entered according to the editing content (ST280). After entry point menu processing (ST282A), copy / move processing (ST282B), deletion processing (ST282C), playlist creation processing (ST282D), or entry point automatic generation processing (ST282E), the date and time of program update by this processing Are set in each piece of management information (program information EX_PGI, item text information EX_IT_TXT, manufacturer information EX_MNFI, etc.) (ST284).

  The program update date and time may be set when any one of the program information EX_PGI, the cell information EX_CI, EVOB, and ESOB is changed. Here, when EVOBI and / or ESOBI are changed, the editing time (EDIT_TIME) of EVOBI and / or ESOBI can be set to ESOB_EDIT_TIME or the like (not shown). Alternatively, the program update date and time may be set.

  Incidentally, in the process of ST284, the manufacturer ID of the device that performed any of the operations of ST282A to ST282E may be set to an editor ID (LAST_MNF_ID) (not shown) in the management information (VMG). This editor ID can be set (or updated) according to the ID information of the device used at that time whenever any of PGI, CI, and ESOB (or EVOB) is changed.

FIG. 10 is a flowchart (overall playback operation flow) for explaining an example of the playback operation. Data processing during playback is for example as follows:
First, it is checked whether or not it is a recordable / rewritable disc (R, RW, RAM) (ST201). If it is not a recordable / rewritable disc (ST201NG), this is returned and the process ends (ST203). If it is a Recordable / Rewritable Disc (ST201OK), it is checked whether or not the disc is recorded (ST205). If nothing is recorded (NO in ST205), a dialog (not shown) including a warning to that effect is displayed (ST206), and the process ends. If any recording has been made on the disc (YES in ST205), the disc management information (HDVR ¥ MG / VMG file) is read (ST207).

  The program and cell to be played are determined by the read VMG file (the user is allowed to select a desired program from the menu display of the recorded title / program registered in the VMG file) (ST208). Here, when playback in the recording order is selected, playback is performed according to EX_ORG_PGCI. When playback is performed for each program (edited by the user), playback is performed according to EX_UD_PGCI (playlist) of the number corresponding to the program to be played back. A cell to be determined is determined (ST210). This determination can be made based on the description content of C_TY in FIG.

  When C_TY indicates a movie cell (ST212 = M_CELL), M_EVOB playback processing is started (ST214). When C_TY indicates a type A stream cell (ST212 = STRA_CELL), ESOB reproduction processing is started (ST216). When C_TY indicates a type B stream cell (ST212 = STRB_CELL), AT_SOB playback processing is started (ST218). When cell reproduction is not completed (NO in ST230), the process returns to ST210, and when completed (YES in ST230), the process returns to another process.

  Here, EVOB, ESOB, and AT_SOB types are determined from C_TY at the time of reproduction, and each reproduction process is performed. In each playback process, EVOB and ESOB are indispensable because video output (S terminal output, RCA output, D terminal output, etc.) is possible, but in the case of AT_SOB, there is no decoding function and the output is a digital stream output. Only (IEEE 1394, HDMI output, etc.) is essential. For this reason, since it is necessary to change the output depending on the reproduction target, the output destination is changed for each object. Further, in this case, a function of skipping reproduction at each entry point (resuming reproduction from the next entry point) by a SKIP key of a remote controller (not shown) is essential.

  FIG. 11 is a flowchart for explaining an example of the EVOB reproduction operation. The MPU unit 80 in FIG. 7 reads the management information in FIG. 4 into the work RAM 80A before starting the reproduction of the program / title recorded on the disc 100 and / or 100a. Therefore, the packet type PKT_TY described in ESTR_FI_GI in FIG. 4 is read from work RAM 80A to determine the packet type (ST2140). If the packet type indicates EVOB, the setting process of ST2146 is entered. That is, APS is set in the video decoder based on the copy control information CCI described in the packet group header 161 in FIG. 1 (0 = No APS, 1 = APS type 1 added, 2 = APS type 2 added, 3 = APS type 3 addition). Here, APS stands for Analog Protection System. Also, CGMSA is set in the video decoder based on CCI (0 = copy prohibited, 1 = copy free). Further, if there is a digital output, the EPN is set (0 = content protection 1 = no content protection ... in this case, the output IC is set to send the digital output as it is). Further, ICT is set (0 = analog video output resolution is limited, 1 = high resolution output is not limited). When the above setting is completed, cell playback processing for the corresponding EVOB is started (ST2148).

  FIG. 12 is a flowchart for explaining an example of the ESOB reproduction operation. MPU section 80 reads PKT_TY from work RAM 80A and determines the packet type (ST2160). When the packet type indicates ESOB, it is checked whether the ESOB is a stream of a system that can be supported by the apparatus of FIG. 7 (for example, whether it is ARIB). If the stream cannot be handled (NO in ST2162), a message to that effect is displayed (ST2163) and the process is terminated. If the stream can be handled (YES in ST2162), the ESOB to be reproduced is determined based on the cell information EX_CI in FIG. 5, and the PMT and STI are read from the corresponding ESOBI (ST2164).

  Thereafter, the setting process of ST2166 is entered. That is, the PID to be reproduced is determined from the PMT, and the determined PID is set in the decoder unit (the initial setting is the default PID). As a result, initial settings are made for the MPEG video decoder, sub-picture decoder, and audio decoder, respectively. After that, APS is set in the video decoder based on CCI (0 = no APS, 1 = APS type 1 added, 2 = APS type 2 added, 3 = APS type 3 added). Also, CGMSA is set in the video decoder based on CCI (0 = copy prohibited, 1 = copy free). Further, if there is a digital output, the EPN is set (0 = content protection 1 = no content protection ... in this case, the output IC is set to send the digital output as it is). Further, ICT is set (0 = high definition HD is downgraded to standard SD and output is 1 = HD is output as it is). When the above setting is completed, the corresponding ESOB cell playback process starts (ST2168).

  FIG. 13 is a flowchart for explaining an example of the AT_SOB reproduction operation. The MPU unit 80 reads PKT_TY from the work RAM 80A (ST2180), and determines a stream to be played based on EX_CI (ST2184). If the determined stream is AT_SOB, the output IC is set to send the digital output as it is (ST2186), and cell playback processing for the corresponding AT_SOB starts (ST2188).

FIG. 14 is a flowchart for explaining an example of processing during cell playback. The cell playback process is, for example, as follows:
First, ESI and ESOB files to be played are determined from the cell information EX_CI, a PID to be played in the EX_CI and a group to be played are determined from the ES_GI, and PIDs of other ESs belonging to the group are extracted and set in each decoder. . Then, the start file pointer FP (logical block number LBN) and end file pointer FP (logical block number LBN) of the cell are determined from the contents of TMAPI, and further, ESOBU_ENT starting from the end time and end time in EX_CI, Determine ESOBU_ENT. Further, the data length of the entries up to the target ESOBU_ENT is accumulated in the address offset ADR_OFS to obtain the start address (LB = FP) and the end address. The remaining cell length is a value obtained by subtracting the start address from the end address, and the reproduction start time is set in the STC (ST2200).

  Subsequently, a read process is executed, and a read address and a read size are determined from the start file pointer (ST2206). When the read unit size to be read is compared with the remaining cell length and the remaining cell length is large (YES in ST2207), a value obtained by subtracting the read unit size to be read from the remaining cell length is set to the remaining cell length (ST2208). If the remaining cell length is small (NO in ST2207), the read length is set to the remaining cell length, and the remaining cell length is set to 0 (ST2209). The read length is set to the length of the read unit, and the read address, read length, and read command are set to the drive unit (ST2210).

  When data transfer is started (YES in ST2212), it waits for 1 ESOBU to accumulate in the buffer. When 1 ESOBU is accumulated (YES in ST2214), data for 1 ESOBU is read from the buffer (ST2216), and buffer decoder transfer processing is performed (ST2220). Then, the read file pointer FP is incremented and the MPEG decoder is set to the normal mode (SCR reading and setting) (ST2224). It is checked whether or not the transfer is completed. If the transfer is completed (YES in ST2226), the remaining cell length is checked. If the remaining cell length is not “0”, that is, if the current cell is not the last cell (NO in ST2228), the process returns to ST2206. If the remaining cell length is “0” (YES in ST2228), this process ends.

  If the transfer has not been completed (NO in ST2226), it is checked whether the SKIP key has been pressed. When the SKIP key is pressed (YES in ST2248), the SKIP process is performed. That is, the address (file pointer) to be read is changed based on the information of the next entry point (ST2250), and the process returns to ST2212. If the SKIP key has not been pressed (NO in ST2248), the process returns to ST2212.

  FIG. 15 is a flowchart for explaining an example of the entry point menu display process. This processing is handled by the EP processing unit 80C of the MPU unit 80 in FIG. FIG. 16 is a diagram for explaining a menu display example of titles with entry points (an example of displaying six thumbnails corresponding to six entry points).

  When the user enters the processing of FIG. 15 by pressing a menu key on a remote controller (not shown), first, management information (VMG file) is read and developed into a work (ST1000). With reference to the cell information (EX_CI in FIG. 5 and C_EPI in FIG. 6) of the management information developed in the work, a setting is made to display a thumbnail (reduced image) for each entry point. 6 in the example of 16). Thereafter, the coordinates to be displayed on the monitor screen of FIG. 16 (the coordinate origin is, for example, the upper left corner of the screen) are determined, and the entry point EP to be displayed first is determined (ST1002) (see the “title 1” thumbnail in FIG. 16). .

  Subsequently, according to the cell information, a thumbnail (reduced image) corresponding to the first EP is displayed at the target position on the screen (ST1004). If there is no other EP to be displayed as a thumbnail (NO in ST1006), it waits for the user to select a specific thumbnail displayed (ST1016). If there are other EPs to be displayed as thumbnails (YES in ST1006), the number of the next thumbnail is checked. If the next image is the fourth image (YES in ST1008), the display position is changed to the lower left (ST1010) like the “title 4” thumbnail in FIG. 16 and the next thumbnail is displayed (ST1004).

  If there is still an EP for thumbnail display (Yes in ST1006), and the next display is not the fourth page (No in ST1008), and the display of the sixth page is not completed (No in ST1012), the display position is one level on the right (thumbnail Moves (one thumbnail) including the space between them (ST1014). When the display of the sixth page is completed (YES in ST1012), a page display symbol for menu display is displayed (when there is a seventh or later EP) (ST1016).

  When the thumbnail display processing for all EPs is completed by the above operation, the user waits for selection of any thumbnail (reduced image cut out from the video image near the EP) or page feed symbol (ST1018). When the page feed symbol is selected (YES in ST1020), the thumbnail display start image number is set to the last displayed number + 1 (ST1022), and the thumbnail of the newly set image number is displayed on the upper left of the next page. Is displayed (ST1004). When a specific thumbnail is selected (NO in ST1020), the reproduction time, cell number, program number, etc. of the stream data corresponding to the selected thumbnail are read from the management information developed in the work memory (ST1024). Transition to playback processing.

  With the processing in FIG. 15, a menu of thumbnails is displayed for each entry point as shown in FIG. 16, and the jump to the target entry point can be directly jumped and reproduced. There are two types of entry points EP in the case of an ESOB stream: type A and type B. PAT / PMT is inserted every 0.5 s (2 s to 5 s in the case of 1-segment broadcasting) in order to quickly start moving image playback when switching channels. Since there is a high possibility that a reference picture can be taken out as soon as playback is started from this PAT / PMT insertion point during random access, an EP is attached at the insertion point of PAT / PMT (no PAT and only PMT for 1-segment broadcasting). That is natural. In addition, where a DIT is present, it is a place where a stream is newly started, so it is natural to add an EP here. A specific example of how to add such an EP will be described below.

  FIG. 17 shows an example of how to attach entry points (in the case of type A). In the case of TYPE-A, since the playback time is the base axis, it is necessary to set the value of PTS in EP. Therefore, PAT / PMT is found at the playback time interval (for example, every 5 minutes) where EP is added, and the PTS of the video pack behind it is set to EP (PAT, PMT are not playback data, so PTS etc. are not attached) For). In the DIT, the PTS of the video pack after the two DITs is set to EP.

  FIG. 18 shows another example of how to attach entry points (in the case of type B). In the case of TYPE-B, since the arrival time is used as a reference axis, it is necessary to set an ATS value in EP. Therefore, PAT / PMT is found at the place of the arrival time interval (example 5 minutes) where EP is attached, and its ATS is set to EP. Further, since there are two DITs in the DIT, it is conceivable to set the ATS of the first DIT or the second DIT to EP.

  FIG. 19 is a flowchart for explaining an example of the entry point automatic generation process. This processing is handled by the EP processing unit 80C of the MPU unit 80 in FIG. The actual EP creation operation will be described below. First, management information (VMG file) is read and developed into a work (ST1100). The user instructs an interval for creating the entry point EP (ST1102). From EX_PGCI, EX_CI for adding EP is determined, and ESOB registered there is read (ST1104).

  The ESOB type is determined by C_TY or SFI_ID (ST1106). In the case of type A, the process moves to ST1110A in order to create an EP based on PTM, and in the case of type B, the process moves to ST1110B in order to create an EP based on PATS.

  In the case of type A, ESOB is read in a certain amount (ST1110A). It is checked whether or not the playback interval has passed the user-specified time (L minutes). If it has not elapsed (NO in ST1112A), the process proceeds to ST1122A. When the playback interval has passed the user-specified time (L minutes) (YES in ST1112A), the PAT / PMT closest to the playback interval is searched for, and the video data TS packet after that is detected (ST1114A). The playback time of the video packet is registered in the EP (ST1116A). Here, when the EP type is TY_B (ST1118A), information in SI or PSI (or playback time or recording time) is stored as text information (ST1120A).

  It is checked whether there is a DIT in the read data. If there is no DIT (NO in ST1122A), the process proceeds to ST1130A. The PAT / PMT closest to the playback interval is searched for, and the video data TS packet behind it is detected. Then, the playback time of the video packet is registered in the EP (ST1124A). If the EP type is TY_B (ST1126A), information in SI or PSI (or playback time or recording time) is stored as text information (ST1128A). It is checked whether or not the ESOB has ended. If it has not ended (NO in ST1130A), the process returns to ST1110A. If it has ended (YES in ST1130A), the processing in FIG. 19 ends.

  In the case of type B, ESOB is read in a certain amount (ST1110B). It is checked whether the arrival time interval has passed the user-specified time (L minutes). If it has not elapsed (NO in ST1112B), the process proceeds to ST1122B. When the arrival time interval has passed the user-specified time (L minutes) (YES in ST1112B), the PAT / PMT closest to the arrival time interval is searched for, and the video data TS packet after that is detected (ST1114B). The arrival time of the video packet is registered in the EP (ST1116B). Here, when the EP type is TY_B (ST1118B), information in SI or PSI (or playback time or recording time) is stored as text information (ST1120B).

  It is checked whether there is a DIT in the read data. If there is no DIT (NO in ST1122B), the process proceeds to ST1130B. The PAT / PMT closest to the arrival time interval is searched for, and the video data TS packet after that is detected. Then, the arrival time of the video packet is registered in the EP (ST1124B). If the EP type is TY_B (ST1126B), information in SI or PSI (or playback time or recording time) is saved as text as text information (ST1128B). It is checked whether or not the ESOB has ended. If it has not ended (NO in ST1130B), the process returns to ST1110B. If it has ended (YES in ST1130B), the process in FIG. 19 ends. As described above, the EP can be automatically created at a location suitable for the convenience of the TS.

FIG. 20 is a diagram illustrating an example of how the stream file information (ESTR_FIT) is configured. The ESTR_FIT includes an ESTR_FI search pointer table ESTR_FI_SRPT, one or more stream file information ESTR_FI # 1 to #n, and one or more stream time map tables ESTMAPT # 1 to #n. Each ESTMAPT includes one or more stream time maps ESTMAP # 1 to #n. Each ESTMAP includes stream time map general information ESTMAP_GI, one or more elementary time map information search pointers EETMAPI_SRP # 1 to #n, and one or more elementary time map information EETMAPI # 1 to #n. Yes. Each EETMAPI includes one or more stream object unit entries ESOBU_ENT # 1 to #n. Each ESOBU_ENT is
1STREF_SZ describing the size of the first reference picture (I picture in the case of MPEG-TS) of the corresponding ESOBU, ESOBU_PB_TM describing the playback time of the corresponding ESOBU, ESOBU_SZ describing the size of the corresponding ESOBU, and start of the corresponding ESOBU It includes ESOBU_S_PKT_POS etc. that describe the packet position.

<Effect of Embodiment>
Entry points can be automatically created for recorded contents of digital broadcasts in the same way as conventional DVD-VR recorders. At this time, the entry point can be attached in a form adapted to the stream type (ESOB of type A or type B).

<Summary>
1. Whether the entry point registration time interval is set to PTM or PATS is changed between type A and type B. That is, in the DVD recording / reproducing apparatus compliant with the HD_DVD-VR standard, when the entry point (EP) is automatically created, the type of content to be created (ESOB type A / type B) is switched according to the management information. Switch between processing on the basis of arrival time and processing on arrival time;
Here, when processing is performed on a playback time basis, the playback time of the first video packet after the PAT / PMT closest to the target playback time is registered in the EP (see FIG. 17);
When processing is performed on the basis of the arrival time, the arrival time of the PAT / PMT closest to the target arrival time is registered in the EP (see FIG. 18).

2. Register an entry point when DIT (Discontinuity Information Table) is detected;
3. When the ESOB type is type A, it is determined whether the EPI type is type A or type B, and if it is type B EPI, text information is recorded in PRM_TXTI;
4). When the ESOB type is type B, it is determined whether the EPI type is type A or type B. If it is type B EPI, text information is recorded in PRM_TXTI.

<Correspondence Example between Embodiment and Invention>
(1) Type A stream object (ESOB type A) recorded by the type A recording mode managed by the reproduction time and Type B stream object (ESOB type B) recorded by the type B recording mode managed by the packet arrival time ), Management information (FIG. 1) for managing the stream object recording area (133 in FIG. 1) for recording using packets and the recording contents (ESOB type A / ESOB type B) of the stream object recording area. Recording information (ESOB type A) using an information storage medium (100 in FIG. 1 or HDD 100a in FIG. 7) having a management information recording area (130 in FIG. 1) for recording 4 HDVR_MG). / ESOB type B) entry point To register (FIG. 17, EPn like in FIG. 18).

  The management information (HDVR_MG in FIG. 4) includes stream file information (ESTR_FIT in FIG. 4) and program chain information (EX_ORG_PGCI / EX_UD_PGCIT in FIG. 4; EX_PGC information in FIG. 5). The stream file information (ESTR_FIT) includes first identification information (SFI_ID in FIG. 4) for distinguishing whether the management target is the type A recording mode or the type B recording mode, and / or The program chain information (EX_PGC information) is whether the cell as the playback unit of the recording contents (ESOB type A / ESOB type B) in the stream object recording area is the type A recording mode or the type B recording mode 2nd identification information (C_TY in FIG. 5) for discriminating whether or not.

  The entry point registration method (FIG. 19) according to an embodiment of the present invention reads the management information (HDVR_MG or VMG) from the information storage medium (ST1100), and the first identification information included in the management information When the content of (SFI_ID) and / or the second identification information (C_TY) indicates the type A recording mode (ST1106 = type A), entry points are registered at a predetermined playback time (interval of L minutes) (ST1112A). To ST1116A), when the content of the first identification information (SFI_ID) and / or the second identification information (C_TY) included in the management information indicates the type B recording mode (ST1106 = type B) Entry points are registered at the packet arrival time (interval of L minutes) (ST1112B to ST1) 16B) constructed as described above.

  (2) At least one of the type A stream object (ESOBtypeA) and the type B stream object (ESOBtypeB) has discontinuity information (digital broadcasting) indicating a change point at which recorded program arrangement information may be discontinuous. DIT: Discontinuity Information Table). Here, when the content of the first identification information (SFI_ID) and / or the second identification information (C_TY) included in the management information indicates the type A recording mode (ST1106 = type A), When continuity information (DIT) is detected (ST1122A = Y), entry points are registered at the predetermined reproduction time (L minute intervals) (ST1112A to ST1116A). Further, when the content of the first identification information (SFI_ID) and / or the second identification information (C_TY) included in the management information indicates the type B recording mode (ST1106 = type B), the discontinuity When sex information (DIT) is detected (ST1122B = Y), entry points are registered at the predetermined packet arrival time (interval of L minutes) (ST1112B to ST1116B).

  (3) The management information includes entry point information (EPI in FIG. 6). Here, when the content of the first identification information (SFI_ID) and / or the second identification information (C_TY) included in the management information indicates the type A recording mode (ST1106 = type A), the entry When the point is registered (ST1112A to ST1116A; or ST1122A to ST1124A), it is determined whether the entry point information corresponding to the registered entry point is a type having a text information field (ST1118A; or ST1126A). If the type has a text information field (STR_A_CELL_EPI_TY_B in FIG. 6), text information and / or time information is described in this text information field (ST1120A; or ST1128A).

  (4) The management information includes entry point information (EPI in FIG. 6). Here, when the content of the first identification information (SFI_ID) and / or the second identification information (C_TY) included in the management information indicates the type B recording mode (ST1106 = type B), the entry When the point is registered (ST1112B to ST1116B; or ST1122B to ST1124B), it is determined whether the entry point information corresponding to the registered entry point is a type having a text information field (ST1118B; or ST1126B). If the type has a text information field (STR_B_CELL_EPI_TY_B in FIG. 6), text information and / or time information is described in this text information field (ST1120B; or ST1128B).

  (5) The recording contents (ESOB type A / ESOB type B) of the stream object recording area are configured to include information of a program association table (PAT) and a program map table (PMT) defined by MPEG. In the type A recording mode (FIG. 17), the entry point is registered in the video packet immediately following the program association table (PAT) or the program map table (PMT) recorded every predetermined time (for example, 5 minutes). (Record the playback time of the video packet in C_EPI). In the type B recording mode (FIG. 18), the entry point is registered in the program association table (PAT) or the program map table (PMT) recorded every predetermined time (for example, 5 minutes). PAT packet arrival time is recorded in C_EPI).

  The present invention is not limited to the above-described embodiment, and can be variously modified within the scope of the gist of the present invention or a future implementation stage based on the technology available at that time. It is. In addition, the embodiments may be appropriately combined as much as possible, and in that case, the combined effect can be obtained. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some configuration requirements are deleted from all the configuration requirements shown in the embodiment, the configuration requirement is deleted when the problem to be solved by the invention can be solved and the effect of the invention can be obtained. The configuration can be extracted as an invention.

  DESCRIPTION OF SYMBOLS 100 ... Information recording medium (DVD-RAM disc etc.); 121 ... AV data recording area; 122 ... VR object group recording area; 130 ... AV data management information recording area (HDVR_MG / VMG); 131 ... Stream object group recording area; 132 ... Stream object unit (ESOB); 134 ... Stream object unit (ESOBU); 140 ... Packet group; 160 ... DVD transport stream packet recording area; 161 ... Packet group header; 163 ... MPEG transport stream (MPEG-TS) 162: Packet arrival time (PATS); 10 ... Playback information management layer; 11 ... Program chain (PGC); 12 ... Program (PG); 13 ... Cell; 21: Stream object information (ESOBI); 22 ... Stream object unit information (ESOBUI; global information); 23 ... Video object management information layer; 24 ... Video object information (EVOBI); 25 ... Video object unit information (EVOBUI) ); 30: Stream object (ESOB) layer; 51: Disc drive unit (optical disc drive using a laser having a wavelength of, for example, 650 nm to 405 nm); 59 ... Decoder unit; 74 ... Digital interface (IEEE1394 I / F, etc.); ... encoder part; 80 ... main MPU part (control part); 83 ... set top box part (satellite digital tuner); 89 ... terrestrial digital tuner; 100a ... information recording medium (hard disk drive) Etc.).

Claims (3)

An information storage medium comprising: a stream recording area for recording a stream whose contents are to be managed by packet arrival time using a packet; and a management information recording area for recording management information for managing the recorded contents of the stream recording area Using the method of reproducing the recorded contents of the stream recording area,
Reading the management information from the information storage medium;
A playback method configured to skip-play the recorded content of the stream recording area using an entry point registered at a predetermined packet arrival time. An information storage medium comprising: a stream recording area for recording a stream whose contents are to be managed by packet arrival time using a packet; and a management information recording area for recording management information for managing the recorded contents of the stream recording area In the apparatus for reproducing the recorded contents of the stream recording area,
Means for reading the management information from the information storage medium;
A recording / reproducing apparatus comprising means for skipping and reproducing the recorded contents of the stream recording area using an entry point registered at a predetermined packet arrival time.   The entry point registered at the predetermined packet arrival time specifies a preceding time lined up on the time axis of the arrival time of the packet and a subsequent time after the preceding time on the time axis. 2. The method according to 2.

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