Classifications

• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
  • G11B20/10—Digital recording or reproducing
  • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
  • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
  • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
  • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
  • G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
  • G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
  • G11B20/10—Digital recording or reproducing
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
  • G11B20/10—Digital recording or reproducing
  • G11B20/10527—Audio or video recording; Data buffering arrangements
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
  • G11B20/10—Digital recording or reproducing
  • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
  • G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
  • G11B20/1251—Formatting, e.g. arrangement of data block or words on the record carriers on discs for continuous data, e.g. digitised analog information signals, pulse code modulated [PCM] data
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
  • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
  • G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
  • G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
  • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
  • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
  • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
  • G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
  • G11B27/327—Table of contents
  • G11B27/329—Table of contents on a disc [VTOC]
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N5/00—Details of television systems
  • H04N5/76—Television signal recording
  • H04N5/84—Television signal recording using optical recording
  • H04N5/85—Television signal recording using optical recording on discs or drums
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N5/00—Details of television systems
  • H04N5/76—Television signal recording
  • H04N5/91—Television signal processing therefor
  • H04N5/93—Regeneration of the television signal or of selected parts thereof
  • H04N5/937—Regeneration of the television signal or of selected parts thereof by assembling picture element blocks in an intermediate store
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
  • G11B20/10—Digital recording or reproducing
  • G11B20/10527—Audio or video recording; Data buffering arrangements
  • G11B2020/10537—Audio or video recording
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
  • G11B20/10—Digital recording or reproducing
  • G11B20/10527—Audio or video recording; Data buffering arrangements
  • G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
  • G11B2020/1075—Data buffering arrangements, e.g. recording or playback buffers the usage of the buffer being restricted to a specific kind of data
  • G11B2020/10759—Data buffering arrangements, e.g. recording or playback buffers the usage of the buffer being restricted to a specific kind of data content data
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
  • G11B20/10—Digital recording or reproducing
  • G11B2020/10916—Seeking data on the record carrier for preparing an access to a specific address
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B2220/00—Record carriers by type
  • G11B2220/20—Disc-shaped record carriers
  • G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
  • G11B2220/213—Read-only discs
• • G—PHYSICS
  • G11—INFORMATION STORAGE
  • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
  • G11B2220/00—Record carriers by type
  • G11B2220/20—Disc-shaped record carriers
  • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
  • G11B2220/2537—Optical discs
  • G11B2220/2541—Blu-ray discs; Blue laser DVR discs
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N9/00—Details of colour television systems
  • H04N9/79—Processing of colour television signals in connection with recording
  • H04N9/7921—Processing of colour television signals in connection with recording for more than one processing mode
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N9/00—Details of colour television systems
  • H04N9/79—Processing of colour television signals in connection with recording
  • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
  • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
  • H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N9/00—Details of colour television systems
  • H04N9/79—Processing of colour television signals in connection with recording
  • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
  • H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
  • H04N9/8205—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal

Definitions

• the present invention belongs to the technical field of slide show reproduction.
• An optical disc playback apparatus mainly has a function of playing back moving images.
• the slide show playback function is a kind of application of the moving picture playback function, and is a function for decoding a plurality of picture data recorded on the optical disc one by one and providing them for viewing by the user.
• the BD-ROM (BluRay Disc Read Only Memory), which will appear in the near future, can record picture data at 1920 x 1080 and V, high resolution. If a photographic work is recorded on a BD-ROM as picture data, and the playback device performs slide show playback on the recorded BD-ROM, it is as powerful as a printed publication. Now, the user can browse photographic works and the like.
• Patent Document 1 JP 2000-348467 A
• An object of the present invention is to provide an optical disc that realizes a low price for commercializing a playback device, but does not interrupt the playback of audio data.
• an optical disc is an optical disc on which a slide show application is recorded.
• the slide show application includes a video stream, an audio stream, and playlist information.
• the browsing unit includes at least one picture data
• the playlist information includes period information indicating a period in which the display of the picture data of each browsing unit is stopped, and the stationary information indicated in the period information is displayed.
• the period is characterized by being equal to or exceeding the length of time to load the subsequent browsing unit into the decoder buffer.
• the reading time into the decoder buffer is indicated in the period information in the playlist information.
• the stationary period indicated in the period information is based on the time to read into the decoder buffer. Therefore, if the static display is performed only for the period indicated in the period information and the start of the display of the subsequent picture data is delayed, the same period is displayed. The audio stream playback that is done is not interrupted.
• the playback device can play slideshows that can reproduce photographic works with the same vigor as a printed publication, the BD-ROM playback device can be further enhanced. Promotion of popularization of ROM playback devices can be achieved.
• the playback device may continue the still display indicated by the period information while executing the same playback control as the playback of the video application. Therefore, the slide show playback function can be implemented in the playback device in a manner compatible with video playback. As a result, it is possible to promote the spread of a playback device having both functions of moving image playback and slide show playback.
• FIG. 1 is a diagram showing a form of usage of an optical disc according to the present invention.
• FIG. 2 is a diagram showing an internal configuration of a BD-ROM.
• FIG. 3 is a diagram showing the process through which TS packets constituting an AVClip are written to a BD-ROM.
• FIG. 4 is a diagram showing an internal configuration of Clip information.
• FIG. 5 A diagram showing the internal structure of EP_map set for the main stream in Browsable SlideShow.
• FIG. 6 is a diagram showing the structure of PlayList information.
• FIG. 7 is a diagram showing an internal structure of PlayListMark information in PlayList information.
• FIG. 8 is a diagram showing designation of a slide show by PlayList information.
• FIG. 9 is a diagram showing an internal configuration of SubPath information.
• FIG. 10 is a diagram showing the setting of SubPlayltem information for configuring Browsable SlideShow.
• FIG. 11 is a diagram showing an internal configuration of a playback apparatus according to the present invention.
• FIG. 12 is a diagram showing changes in buffer states in Read Buffer 1 and Read Buffer 2.
• FIG. 14 shows the buffer state in the elementary buffer when the Read Buffer force is transferred as shown in FIG. 13 (a) and (b).
• FIG. 14 (&) is a diagram showing the StilLTime setting in the plasmid information when it occurs in the VBV-delay force Elementary Buffer in (b).
• FIG. 16 is a flowchart showing a playback procedure by the control unit 9;
• FIG. 17 is a flowchart showing a chapter search processing procedure.
• FIG. 18 is a flowchart showing a chapter skip processing procedure.
• FIG. 19 is a diagram schematically showing how the main stream according to the second embodiment is configured.
• FIG. 20 shows the internal structure of PlayList information and AVClip.
• FIG. 21 is a diagram showing an internal configuration of (a) Browsing Unit.
• FIG. 22 is a diagram showing an example of subtitle control by PCS.
• FIG. 23 is a diagram showing functional segments belonging to (a) Browsing Unit.
• FIG. 24 is a diagram showing an example of an ICS that defines dialog control in a slide show.
• FIG. 25 (a) to (c) Playback time force of video stream When the time point tx is reached, FIG.
• FIG. 26 is a diagram showing state transition in a menu displayed in a slide show.
• FIG. 27 is a diagram showing a branch by a navigation command of a slide show.
• FIG. 28 is a diagram showing an internal configuration of a playback apparatus according to the second embodiment.
• FIG. 29 is a diagram showing a buffer state when chapter skip is performed.
• FIG. 30 (a) is a diagram showing a size limit of picture data in a Browsing Unit. (b) (c) It is a figure which shows the size restriction
• FIG. 31 is a diagram showing buffer states of Read Buffer 1 and Read Buffer 2 in the internal configuration shown in FIG. 28.
• FIG. 32 is a diagram showing changes in the buffer state of Elementary Buffer and Coded Data buffers 21 and 31 due to the output from Read Buffer 1 in FIG.
• FIG. 1 is a diagram showing a form of usage of the optical disc according to the present invention.
• the optical disc according to the present invention is a BD-ROM100.
• This BD-ROM 100 is used for supplying movie works to a home theater system formed by a playback device 200, a remote controller 300, and a television 400.
• FIG. 2 shows the internal structure of the BD-ROM.
• the BD-ROM is shown in the fourth row of this figure, and the tracks on the BD-ROM are shown in the third row.
• the track in this figure is drawn by stretching the track formed in a spiral shape with the inner peripheral force of the BD-ROM extending to the outer periphery in the horizontal direction.
• This track has a lead-in area, a volume area, and a lead-out area.
• the volume area in this figure has a layer model of physical layer, file system layer, and application layer.
• the BD-ROM application layer format (application format) is expressed using the directory structure as shown in the first row of the figure. In the first stage, the BD-ROM has a BDMV directory under the Root directory.
• BDMV directory Under the BDMV directory, there are three subdirectories called a PLAYLIST directory, a CLIPINF directory, and a STREAM directory.
• the STREAM directory is a directory that stores a group of files that are the main body of the digital stream, and there are files (00001.m2ts, 00002.m2ts) with the extension m2ts.
• the PLAYLIST directory contains a file (OOOOl.mpls) with the extension mpls.
• the CLIPINF directory contains files with the extension clpi (00001.clpi, 00002.clpi).
• PlayList information The following explains each file that is a component of Browsable SlideShow.
• a file with the extension .m2ts is a file storing AVClip.
• This AVClip has the types of main stream and sub stream.
• the AV Clip as the main stream is an MPEG2-TS format video stream.
• the video stream is composed of a plurality of Intra pictures. These pictures are provided with end codes.
• the video stream is composed of a plurality of IDR pictures. An end code is also given to these pictures.
• AVClip which is a substream, is an MPEG-TS format audio stream.
• FIG. 3 is a diagram showing a process through which TS packets constituting an AVClip are written to a BD-ROM.
• the TS packet that constitutes the AVClip is shown in the first row of the figure.
• TS packets constituting the AVClip are assigned TS_extra_header ("EX" in the figure) as shown in the second row.
• the third and fourth tiers show the correspondence between BD-ROM physical units and TS packets.
• a plurality of sectors are formed on the BD-ROM.
• TS packets with extra.header (hereinafter abbreviated as TS packets with EX) are grouped every 32 and written to 3 sectors.
• the 32 EX-attached TS packets stored in 3 sectors are called “Aligned Units”. When writing to a BD-ROM, encryption is performed in units of Aligned Units.
• the error correction code is added in units of 32 sectors, and an ECC block is configured.
• the playback device accesses the BD-ROM in units of Aligned Units, it can obtain 32 complete TS packets with EX.
• the above is the process of writing AVClip to BD-ROM.
• FIG. 4 shows the internal structure of Clip information. As shown on the left side of this figure, Clip information is
• CPI consists of EP_map.
• EP_map consists of Ne EP_map_for_one_stream_PID (EP_map—for—one—stream—PID (0) to EP—map—for—one—stream—PID (Ne—l).
• EP—map_for_one_stream_PID EP_map is the EP_map for each elementary stream belonging to 1.
• the EP_map indicates the packet number (SPN_EP_start) of the entry position where the Access Unit Delimiter of the I picture exists on one elementary stream, and the entry temporary (PTS_EP_start).
• the lead line cu3 in the figure closes up the internal structure of EP_map_for — one_stream_PID.
• EP_map_for_one_stream_PID includes Nc EP_High (EP_High (0) to EP_High (Nc-1)) and Nf EP ⁇ ow (EP ⁇ ow (0) to EP ⁇ ow (Nf-l
• EP_High has a role to represent the upper bits of SPN_EP_start and PTS_EP_start of I picture
• EP ⁇ ow has a role to represent the lower bits of SPN_EP_start and PTS_EP_start of I picture.
• EP_High (i) is “ref_to_EP ⁇ ow_id [i]” that is a reference value for EP ⁇ ow, “PTS_EP_High]” that indicates the upper bits of PTS of I picture, and I picture “SPN_EP_High [i]” indicating the high-order bits of the SPN.
• i is an identifier for identifying any EP_High.
• Lead-out line cu5 in the figure closes up the configuration of EP ⁇ ow.
• EP ⁇ ow capable of angle switching operation for the corresponding I picture?
• ⁇ Is_angle_change_point (EP_ow_id) '' indicating whether or not
• ⁇ P TS_EP owow () indicating the lower bit of the PTS of the corresponding I picture “EP_ow_id)” and “SPN_EP ⁇ ” indicating the low-order bits of the SPN of the corresponding I picture.
• w (EP ⁇ owjd) ”.
• EP ⁇ owjd is an identifier for identifying an arbitrary EP ⁇ ow.
• Clip info in Clip information will be described.
• the leader line ctl in the figure closes up the structure of Clip info ().
• Clip infoO includes “clip_stream_type” indicating the type of digital stream, “application_type” indicating the type of application using this AVClip, “TS_recording_rate” indicating the recording rate of AVClip, and AVClip. It can be seen that it is composed of “number_of_source_packet” indicating the number of TS packets to be configured. Of these, applicationj pe is the AVClip corresponding to this Clip information.
• the AVClip type is MainPath of the Browsable Slide Show.
• “MainPath” means a video stream out of a set of video streams and audio streams constituting Browsable SlideShow.
• EP_map setting for the main stream of Browsable SlideShow is explained.
• PTS is set so that playback is performed at multiple points in time (tl to t7).
• Intra picture power shall be present in the main stream.
• the EP_map setting for this main stream is as shown in Figure 5.
• Figure 5 shows the internal structure of EPjnap set for the main stream in Browsable SlideShow.
• EPjnap Since EPjnap is set to indicate all the pictures in the slide show, the individual Entry_Points # 1 to # 7 in EPjnap are the playback times tl, t2, t3, t4, t5, t6 of the individual pictures in the slide show. , t7 is specified as the entry time (PTS_EP_start) and is associated with the entry position (SPN_EP_start).
• “Browsing Unit” is a playback unit having at least one picture data to be displayed statically. By accessing this Browsing Unit, the playback device can extract the complete picture data from the video stream. EPjnap can realize playback from any picture data by indicating the address of this "Browsing Unit" in Entry_Point.
• the “Browsing Unit” may have two or more picture data.
• .mpls, 00002.mpls, 00003.mpls is a file storing PlayList information. Play
• FIG. 6 is a diagram showing the structure of PlayList information. As shown on the left side of this figure, PlayList information is composed of “MainPath information”, “PlayListMark information”, and “SubPath information”.
• the MainPath information (MainPathO) is composed of a plurality of Playltem information (P1 ayltem information #l to #m) as indicated by a dashed arrow mpl.
• a Playltem is a playback section defined by specifying In_Time and Out_Time on one or more AVClip time axes.
• a PlayList (PL) consisting of multiple playback sections is defined.
• a broken line hsl in the figure closes up the internal structure of Playltem information.
• Playltem information includes “Clip_information_file_name” indicating the corresponding Clip information, “Clip_codec_indentifier” indicating the encoding method of the corresponding AVClip, and “In” indicating the time at which the AVClip playback should start. “_time”, “Out_time” indicating the time at which the playback of the AVClip should end, “Still_mode”, and “Still_time”.
• StilLmode and Stil-time are characteristic of the information elements constituting the PlayList information.
• “Still_mode” indicates whether or not to display the last picture data statically when playing pictures from In_time to OuUime.
• StilLmode indicates that the still display is not continued.
• StilLmode indicates that the still display is continued for a finite time.
• the length of time for static display is set to StillLtime.
• StilLmode indicates that the static display will continue for an infinite time. The display is canceled when the static display is continued for an infinite time by an explicit operation from the user.
• Standard_time represents the length of time in seconds that the still display is continued when StilLmode is set to 01.
• Playltem information The above is the description of Playltem information according to the present embodiment. Next, PlayListMark information will be described.
• FIG. 7 shows the internal structure of PlayListMark information in PlayList information.
• the PlayListMark information is composed of a plurality of PLMark information (#l to #n).
• PLmark information (PLmarkO) is information that designates an arbitrary section of the PL time axis as a chapter point.
• the PLmark information includes “re_playItem_Id” indicating the Playltem to be specified by the chapter and “mark_time_stamp” indicating the chapter position in the Playltem in time notation.
• FIG. 8 is a diagram showing designation of a slide show based on PlayList information.
• the second level of the figure shows Playltem information.
• This second level consists of six Playltem information # 1 to # 6.
• the arrows ytl, 2,3,4,5,6 in the figure symbolize the designation by In_time and OuUime in Playltem information, and the arrows stl, 2,3,4,5,6 symbolize the designation by StilLTime.
• Indicate The Playltem information is set to specify individual picture data in the video stream so that the arrow force can be output.
• StilLTime is set to indicate the interval until the subsequent picture data is displayed. In this way, the individual picture data that make up the slideshow Each data is specified as a playback start point and playback end point by six pieces of Playltem information.
• the first level of the figure shows PLMark information.
• PLMark information # 1 to # 6 there are six pieces of PLMark information # 1 to # 6.
• Arrows ktl, 2,3,4,5,6 indicate the specification by ref_to_PlayItem_Id of PLMark information.
• the ref_to_PlayItem_Id of the PLMark information can be specified by specifying each of the Playltem information.
• In_time and Out_time in Playltem information specify the frame period of one picture on the AVClip time axis as the start point and end point of the playback section.
• StilLTim e indicates how long to continue displaying the picture after displaying the picture.
• the PLMark information of Playltem information specifies one picture as a chapter. In this way, the data structure of the slide show is defined using PlayList information that assumes playback of moving images. This completes the explanation of Playltem information and PLMark information. Next, SubPath information will be explained.
• FIG. 9 shows the internal structure of SubPath information.
• the leader line in the figure closes up the structure of the SubPath information.
• SubPath information as shown in the figure, the sub path defined by this SubPath information is, as "SubPath_Typ e" indicating the audio playback path, indicating whether or not repeat the voice playback "is_repeat_sub_path” , And more than one “SubPlay Item information”.
• the leader line in the figure closes up the structure of SubPlayltem information.
• each SubPlayltem information includes “Clip_information_file_name”, “SubPlayItem—In—time”, “3 ⁇ 4ubPlayItem—uut—time”, “sync—Playltem—id”, and “sync—star t_PTS_of_PlayItem”.
• Clip_information_file_name is information for uniquely specifying a sub clip corresponding to the sub P1 ayltem by describing the file name of the clip information.
• “SubPlayItem_In_time” is information indicating the start point of the sub play system on the playback time axis of the sub clip.
• “SubPlayItem_Out_time” is information indicating the end point of the sub play system on the playback time axis of the sub clip. [0035] “sync_PlayItem_id” is information for uniquely designating the ones that should be synchronized with this sub-Playltem among the Playltems constituting the MainPath. SubPlayltem-In-time exists on the playback time axis of the PlayItem specified by sync-Playltem-id.
• Sync_start_PTS_of_PlayItem indicates where the start point of the sub-Playltem specified by SubPlayItem_In_time exists on the playback time axis of the PlayItem specified by sync_PlayItem_id. Since the audio playback path of Browsable SlideShow is not intended to be synchronized with the main path, “sync_PlayItem_id” and “sync_start_PTS_of_PlayItem” are set to “Invalid”.
• FIG. 10 is a diagram showing the setting of SubPlayltem information for configuring Browsable SlideShow.
• the first row in the figure shows the audio stream as the substream, the second row shows the SubPat information, and the third row shows the Playltem information. Since the time points ta and tb are specified by SubPlayltem Jn_time and SubPlayItem_Out_time on the time axis of the first stage audio stream, playback based on the PlayList information is specified by SubPlayItem_In_time and SubPlayltem.Ou Uime. This is the target area. Since Browsable SlideShow does not intend to synchronize the main and sub paths, audio playback is not synchronized with picture data playback. SubPlayltem information is used as BGM in Browsable SlideShow.
• FIG. 11 is a diagram showing the internal configuration of the playback apparatus according to the present invention.
• the reproducing apparatus according to the present invention is industrially produced based on the internal configuration shown in the figure.
• the playback device according to the present invention is mainly composed of two parts, a system LSI and a drive device, and can be industrially produced by mounting these parts on the cabinet and substrate of the device.
• the system LSI is an integrated circuit in which various processing units that function as playback devices are integrated.
• the playback devices produced in this way are Read Bufferl, Read Buffer2, Drive 3, Demodulation, Ecc decode4a, Switch 4b, Elementary Buffer5, Video decoder 6 ⁇ Video plane 7, Scenario memory 8, Control unit 9, Elementary BufferlO, Audio Decoder 11, Source De— Packetizerl2a, b, Arrival Time Clock Counter 13a, b
• Read Bufferl is a buffer for storing all or part of picture data in the TS packet state.
• Read Buffer 2 is a buffer for storing all or part of audio data in the TS packet state.
• the capacity of Read Bufferl needs to be determined in consideration of the time required to accumulate Read Buffer2. In other words, if the transfer rate to Rea d Bufferl is Rmaxl,
• Read BulFerl Rmaxl X
• the capacity of Read Bufferl must be determined so as to satisfy the relationship of “time to fill Read Buffer2 with jump”.
• jumping is synonymous with disk seeking.
• the main stream force When reading data into Read Buffer 2, the main stream force must also consider the jump time to the substream (Tjump) and the jump time from the substream to the main stream (Tjump).
• the specific value of the Read Bufferl memory size is 1.5 Mbyte or less. In this state, the size of “Browsing Unit” is set smaller than the size of Read Buffer 1.
• the BD-ROM drive 3 performs loading / ejecting of the BD-ROM and reads picture data and audio data from the BD-ROM. If the size of the picture data is smaller than Read Buffer, Read Buffer 1 is used for preloading the picture data. After preloading, the playback device reads the audio data and starts playback. Except for the initial state, Re ad Bufferl must always be buffer full. When the next picture data is requested, the drive device jumps to the requested position, reads the picture data, and jumps to the recording position of the audio data. Output rate from Read Bufferl Rmaxl 1S Underflow of Read Bufferl and Read Buffer2 does not occur as long as the above equation is satisfied. This ensures seamless playback of picture data and audio data.
• the drive device reads the picture data separately in multiple batches. For example, when picture data is read out twice, a jump occurs to read the first half and the second half in succession.
• the drive unit is responsible for keeping Read Bufferl and Lead Buffer2 full when performing a powerful jump. As long as the output rate Rmaxl from Read Bufferl satisfies the above formula, underflow of Read Bufferl and Read Buffer2 will not occur. This ensures seamless playback of picture data and audio data. Even in this case, the jump for reading the audio stream must be performed when the Rea d Bufferl is full.
• Rtsl is the transfer rate from the Read Buffer 1 to the video decoder 6, and is the transfer rate after passing through the source de-packetizer 2a, and is defined in Clip information as TS_recording_rate.
• Rts2 is a transfer rate from the Read Buffer 2 to the audio decoder 11 and is a transfer rate after passing through the source de-packetizer 2b, and is defined in Clip information as TS_recording_rate.
• Rmaxl is a transfer rate from the Read Buffer 1 to the video decoder, and is a transfer rate before passing through the source packet-zerl 2a, and is calculated as TS_recording_rate X 192/188. With this Rmaxl, the data in Read Bufferl is extracted from Read Bufferl.
• (192/188) is a conversion coefficient for converting the transfer rate defined in the decoder peripheral part to the transfer rate in the peripheral part of the drive unit.
• the peripheral part of the drive device is a part to which TS packets with extra_header are transferred.
• the peripheral part of the decoder is the part that uses the TS packet from which extra_header has been removed as the transfer target.
• the decoder peripheral part has a configuration according to the MPEG2 decoder model, and the transfer rate is also defined according to the MPEG2 decoder model.
• the conversion factor described above is used for the transfer rate defined in the decoder peripheral part. It is necessary to multiply. The above is the significance of 192/188. Since then, the notation 192/188 has appeared frequently, but was interpreted as the meaning of the conversion coefficient as described above.
• Rmax2 is a transfer rate from Read Buffer2 to audio decoder 11, and Souce de- This is the transfer rate before passing through packetizerl2b, and is calculated as TS_recording_rate X 192/188.
• FIG. 12 is a diagram showing changes in the buffer state in Read Buffer 1 and Read Buffer 2.
• the first row shows the arrangement of the main stream and substream in the BD-ROM, the second row shows the buffer state in Read Buffer 1, and the third row shows the buffer state of Read Buffer 2.
• the buffer state in the second stage is configured to repeat a monotonic increase due to Rud-Rmaxl and a monotonic decrease due to Rmaxl.
• Rud-Rmaxl is the input / output speed difference in Read Bufferl and indicates a monotonically increasing slope.
• the slope of the monotonic decrease represents Rmaxl. These times are shown in the figure as the following four times.
• Tread-a Time for reading audio data
• Tjump has two types of disc seek time after reading audio data (Tread-a) and accessing picture data, and seek time after reading picture data (Tread-v) and accessing audio stream. There is. These Tjumps are assumed to be 1 second. This time of 1 second is the time that can seek almost half the distance (no, one stroke) of a 12cm BD disc.
• Read-v refers to a period during which picture data read from the BD-ROM drive 3 is stored in the Read Buffer 1. Accumulation in Read Bufferl is the value (Rud-Rmaxl) obtained by subtracting the supply rate Rmaxl to Elementary Buffer5 from the read rate Rud.
• Tread-v 1.2MB / (Rud- Rmaxl)
• “S” indicates a sufficient accumulation amount that should be accumulated in the Read Buffer 2 in order to switch picture data, that is, to read, decode, and display new picture data.
• the significance of setting this “S” is to prevent the amount of data stored in Read Buffer 2 from underflowing. If Read Buffer 2 underflows, this indicates that data cannot be supplied to the audio decoder, that is, audio playback stops halfway.
• the amount S of Read Buffer 2 that can be used to reproduce picture data can be obtained from the following equation.
• This formula suspends audio data reading and seeks to picture data (Tjump), picture data reading time (Tread-v), and seeks to the position where picture data force audio data reading is interrupted This means that it is sufficient if audio data can be supplied to the decoder at a predetermined transfer rate during the time (Tjump).
• Tread-v 190msec.
• Tread-a refers to a period during which audio data read from the BD-ROM drive 3 is stored in the Read Buffer 2.
• Total is a period during which picture data is transferred from Read Buffer 1 to Elementary Buffer 5 at the supply rate Rmaxl to Elementary Buffer 5. This period is obtained from the calculation Tjump + Tread-a + Tjump.
• Rud— Rmax2 54Mbps— (198/188) X 30Mbps.
• Ttotal Tjump + Tread— a + Tjump
• the data stored in Read Bufferl is output as Tjump + Tread-a + Tjump !, and then output to Elementary Buffer5. During that time, the data is sought to the area where the audio data is recorded. Is read, and when returning to the area where picture data is recorded,! /! Processing is repeated.
• FIG. 13 (a) is a diagram illustrating transfer of picture data when the size of picture data is 1.2 Mbytes.
• FIG. 13 (b) is a diagram illustrating the transfer of picture data when the size of the picture data is 3 ⁇ 4.2M knots.
• the restriction on seamless playback of audio is limited to a certain size or less, and Read Bufferl may not be able to read the entire picture data in a single Tread-v.
• the transfer period per transfer is determined by the Tjump + Tread-a + Tjump period described above. The period required for this increases at large time intervals of +5 seconds, such as 5 seconds, 10 seconds, and 15 seconds. This increase in transfer period affects Elementary Buffer 5 as a longer VBV-delay. This concludes the description of the data reading by the drive 3 and the buffer states in Read Buffer 1 and Read Buffer 2.
• Elementary Buffer 5 is a buffer that stores pictures in an encoded state (I picture, B picture, P picture).
• the video decoder 7 decodes the picture stored in the Elementary Buffer 5, obtains an uncompressed picture, and outputs it.
• the video plane 7 is a plane for storing uncompressed pictures.
• a plane is a memory area for storing pixel data for one screen in the playback device.
• the resolution on video plane 7 is 1920 x 1080.
• the picture data stored in scene 7 is composed of pixel data expressed as 16-bit YUV values.
• the scenario memory 8 is a memory for storing current Clip information and current PlayList information.
• Current Clip information refers to multiple Clip information recorded on the BD-ROM that is currently being processed.
• Current PlayList information is recorded on the BD-ROM! / Of the multiple PlayList information, the one that is currently being processed! / Is selected.
• the control unit 9 uses the instruction ROM and the CPU, and controls the entire playback device based on the current clip information and the current play list information stored in the scenario memory.
• FIGS. 14A and 14B are diagrams showing the buffer state in Elementary Buffer 5 when the transfer from Read Buffer 1 is performed as shown in FIGS. 13A and 13B.
• the nofer state of Elementary Buffer 5 consists of a monotonic increase due to Rbx and a monotonic decrease at the decoding time (Decoding).
• Rbx is the input speed to Elementary Buffer 5.
• the slope of monotonic decrease is almost zero.
• VBV-delay of Elementary Buffer 5 is the same length as Tjump + Tread-a + T jump of Elementary Buffer 5.
• the output time from Read Buffer and the input time to Elementary Buffer 5 are the same. do not do. This is because the inputs and outputs to these koffers are asynchronous.
• StilUim of the Playltem information that covers the VBV-delay fluctuation for each picture data is set.
• FIGS. 15 (a) and 15 (b) are diagrams showing Still_Time settings in Playltem information when the VBV-delay force Elementary Buffer 5 in FIGS. 14 (a) and 14 (b) is generated.
• the lower part of Fig. 15 (a) and (b) is the same as the buffer state shown in Fig. 14 (a) and (b).
• the upper row is the setting of PlayList information.
• In_time and Out_time of individual Playltem information in the PlayList information indicate the picture to be output to the video encoder at the time of Decoding.
• StilLTime belonging to the same Playltem information is set to indicate the VBV-delay of the picture data following the picture data specified by the In_time and Out_time.
• FIG. 15 (a) the VBV-delay power for reading the picture data next to the picture data specified by In_time and Out_time of Playltem information # 1 to Elementary Buffer 5 is shown. Then, set StilLTime of Playltem information # 1 to 5 seconds. In FIG. 15 (a), the VBV-delay power seconds of all picture data are set, so the StilLTime of Playltem information #l to PlayItem information # 3 is all set to 5 seconds.
• the VBV-delay for reading the picture data next to the picture data specified by In_time and Out_time of Playltem information # 1 to Elementary Buffer 5 is 10 seconds.
• the StilLTime of Playltem information # 1 is set to 10 seconds.
• the video decoder 6 executes display control based on this, the current picture data is still displayed until the next picture data is stored in the Elementary Buffer 5. Will continue. Even if the VBV-delay force of the picture data fluctuates to 10 seconds, 5 seconds, or 15 seconds due to the continuation of such still image display, the sound reproduction during that time is not interrupted.
• next browsing-unit The picture data referred to by Playltem information next to Playltem information to which StilLTime belongs (referred to as current Playltem information) is called "next browsing-unit". Then, in a state where multiple TS packets are included, the size of next browsing—unit is expressed as size of next browsing—unit, and the rate of conversion for size of next browsing-unit is expressed as' TS — Record ing— Call rate. T3 ⁇ 4—recording-rate is the value of the next browsing-unit send rate ⁇ max Maxl, g, and taste, and in the clip information corresponding to AVClip including next browsing-unit, “TS_recording_rate” Defined in Fino Red.
• Playback control based on StilLTime in Playltem information is performed according to the flowchart in FIG.
• FIG. 16 is a flowchart showing a playback procedure by the control unit 9.
• step S 1 is a determination as to whether or not SubPath information exists in the PlayList information to be reproduced. If it exists, it is described in the SubPlayltemk's Clip_information_file_name in the SubPath information !, and the AVClip is set to AVCliph (step S2), and the drive device and decoder are instructed to play back from SubPlayItemJn_time to SubPlayItem_Out_time of the AVCliph. (Step S3).
• the first Playltem information in the PlayList information is set as Playltem information i (Step S4), and the loop processing from Step S5 to Step S9 is executed.
• the control variable in the loop processing from Step S5 to Step S9 is the variable i.
• the processing of executing the processing from Step S5 to Step S7 and then incrementing the control variable i (Step S8) It is executed until the number of Playltem (Number Of Playltem) is exceeded ( Step S 9).
• step S5 The processing of step S5 to step S9 will be described. These processes are described in Clip_information_file_name of Playltem information i !, and AVClip as AVClipj (step S5), and instruct the drive device and decoder to play the part from Playltem.ln_time to Playltem.OuUime. (Step S6).
• step S 7 After the time indicated by Still_Time of Playltem information i to elapse (step S 7). Since StilLTime is longer than VBV-delay when reading subsequent picture data, it will continue at this time. This enables display control as shown in FIG.
• the individual picture data constituting the slide show is specified using Playltem information and PLMark information! Therefore, the previous and next picture data can be displayed by functions such as chapter skip and chapter search. It can be played back.
• the chapter search function is described in the PLMark information !, and the Playltem information corresponding to the replay_PlayItem_Id is specified from a plurality of Playltem information, and the specified Playltem information is defined in the AVClip.
• the controller 9 performs random access from the position indicated by mark_time_stamp described in the PLMark information.
• the control unit 9 performs the mark_time_stamp described in the PLMark information.
• the Entry Point having PTS_EP_start is specified closest to the point, and playback is performed from the I picture address corresponding to SPN_EP_start of the specified Entry Point.
• the chapter skip specifies PLMark information that defines a chapter immediately before or after the chapter corresponding to the current playback position, and executes a chapter search for the PLMark information.
• FIG. 17 is a flowchart showing the chapter search processing procedure.
• step S124 the chapter selection in the chapter menu is awaited. If a chapter selection is made, the PLMa information corresponding to the selected chapter is set to the current 13 ⁇ 4 ⁇ 1 ⁇ ⁇ 1 1 ⁇ (step 3125). .
• step S 126 the current P1 The PI described in a_ListItem_Id of ayListMark is set to Playltemfe, and in step S127, the Clip information specified by Clip jnformation_file_name of Playltemfe is read.
• step S128 the mark_time_stamp of the current PlayListMark is converted to an I picture address u using the EP_map of the current Clip information.
• step S 129 OuUime of Playltemfe is converted to I picture address V using EP_map of current Clip information.
• Step S130 commands the decoder to output from mark_time_stamp of the current PlayListMark to OuUime of Playfemfe. Thereafter, the process proceeds to step S7 in FIG. 16 and waits for StilLTime to elapse.
• the above is the chapter search procedure.
• the chapter skip processing procedure will be described.
• FIG. 18 is a flowchart showing the chapter skip processing procedure.
• Step S131 waits for an operation for the SkipNext key and SkipBack key for the remote control. If an operation is performed, step S132 is executed. In step S132, it is determined whether the pressed key is the force of the SkipNext key or the SkipBack key. If it is the SkipBack key, the direction flag is set to -1 in step S133, and if it is the SkipNext key, the step is performed. In S134, the direction flag is set to +1.
• Step S135 is a step of identifying the current PLMark by converting the current PI and the current PTM.
• Step S136 is a number obtained by adding the value of the direction flag to the number of the current PLMark and the number of the current PlayListMark. Set as. Here, if it is a SkipNext key, the direction flag is set to +1, so the current PlayListMark is incremented. If it is a SkipBack key, the direction flag is set to -1, so the current PlayListMark will be decremented.
• TS packet reading is performed by executing the processing procedure of step S126 to step S130 as in FIG.
• the above are the components related to video playback.
• Elementary Buffer (EB) 10 is a buffer in which PES packets that make up an audio stream are stored.
• the audio decoder 11 decodes the PES packet output from the Elementary Buffer 10 and outputs uncompressed audio data. If there is a chapter skip operation, playback of audio data is not disturbed. In other words, picture data that does not interfere with audio playback can be skipped forward and backward. This is made possible by independent STC control. At the time of this chapter skip operation, the video decoder restarts playback while referring to STCmain. As a result, audio playback is performed independently of the chapter skip operation. If it is set in the is_repeat_SubPlayItem information column of the SubPath information, the audio playback will be repeated. S TCsub may be reset during repeated audio playback!
• Arrival time Clock Counter 12a, b generates Arrival Time Clock based on 27MHz crystal oscillator (27MHz X-tal).
• Arrival Time Clock is a clock signal that defines the time axis that serves as a reference for A TS given to TS packets.
• the Source de-packetizer l3a, b removes the TP_extra_header from each TS packet constituting the Aligned Unit and outputs only the TS packet. .
• the output from SourceDe-Packizerl3a, b is made at the timing when the arrival time clock counter 12a, b reaches the ATS indicated by the time force TP_extra_header that has passed. Since TS packet output is performed according to ATS, TS packet output is performed according to the current time of arrival time clock even if there is a speed difference such as 1x speed or 2x speed when reading from BD-ROM. Will be.
• constituent elements called PID Filter, Transport Buffer, and Multiplexed Buffer exist between Read Bufferl, Read Buffer 2, and Elementary Buffer 5. However, since these are complicated to illustrate, these components may be omitted in the drawing.
• StilLTime in PlayList information is based on VBV-delav when an audio stream is read out. If the static display is performed for the indicated period and the display start of the subsequent picture data is delayed, the playback of the audio stream that is performed simultaneously is not interrupted.
• the power described as the main stream in the first embodiment is composed only of the video stream
• the second embodiment relates to an improvement in the case where other data is multiplexed on the main stream.
• FIG. 19 is a diagram schematically showing how the main stream according to the second embodiment is configured.
• the main stream AVClip (middle), multiple video frames (pictures pjl, 2,3) power (upper first), converted to PES packet sequence (upper second), and TS packets (Upper third stage), and the same subtitle presentation graphics stream (lower first PG stream) and interactive interactive graphics stream (lower second IG stream) are converted to TS packets. (Bottom 3rd stage) is composed by multiplexing these.
• the PG graphics stream is a graphics stream constituting a caption for each language.
• the IG stream is a graphics stream that realizes interactive control, and includes graphics data that constitutes GUI parts such as menus and buttons, and commands (navigation commands) that should be executed by the playback device when the buttons are pressed.
• These PG stream and IG stream power are related data to be displayed synchronously with picture data.
• FIG. 20 shows the internal structure of PlayList information and AVClip.
• the first and second tiers in the figure show PlayList information
• the third, fourth, and fifth tiers show the video stream, IG stream, and PG stream multiplexed in the AVClip.
• the seventh row shows the playback unit composed of picture data and functional segments.
• this playback unit is called a Browsing Unit.
• FIG. 21 (a) shows the internal structure of the Browsing Unit. This Browsing Unit uses at least one picture data and Epoch in the PG stream. It consists of functional segments that make up and functional segments that make up Epoch in the IG stream.
• FIG. 21 (b) is a diagram showing the setting of Composition_State, which is a common element of PCS and ICS.
• Each Browsing Unit's Composition State in PCS ICS is set to indicate Epoch Start. This completes the Epoch in each Browsing Unit.
• each Browsing Unit has the following restrictions.
• the encoding method in picture data is MPEG2_Video
• the Browsing Unit includes one picture data or one or more GOPs terminated by sequence end code
• each Browsing Unit Unit includes at least one picture data that ends with stream end code.
• FIG. 21 (c) is a diagram showing what packet sequence a Browsing Unit is composed of.
• the TS packet located at the head of each Browsing Unit is a TS packet storing a part of the video stream.
• the functional segments that make up the PG stream and IG stream follow the packet that stores a part of this video stream.
• the PTS of the first I-picture and IDR picture in the Browsing Unit is the smallest value among the I-picture, IDR-picture PTS, and ICS PTS.
• ODS Object Definition Segment
• WDS Window Definition Segment
• PDS Pulse Definition Segment
• PCS Pressentation Control Segment
• Such page controls include Cut-In / Out, Fade-In / Out, Color Change, Scroll, and Wipe-In / Out, which gradually erases certain subtitles by accompanying PCS page control. However, a display effect of displaying the next subtitle can be realized.
• FIG. 22 is a diagram illustrating an example of caption control by the PCS.
• the second row shows the functional segments belonging to each Browsing Unit, and the first row shows the subtitles drawn by the functional segments in each Browsing Unit.
• graphics data as subtitles is defined by ODS, and the drawing area of graphic data on the screen is defined by WDS.
• PCS Presentation Control Segment
• Cut-In / Out Fade-In / Out
• Color Change Scroll
• Wi-In / Out can be used.
• ICSQnteractive Composition Segment a functional segment called ICSQnteractive Composition Segment
• PDS Palette Difinition segment
• ODS Object Dennition Segment
• END END of Display Set Segment
• ODS Object Definition Segment
• PDS Picture Definition Segment
• the ICS is a functional segment that defines interactive control that changes the state of buttons according to user operations.
• Figure 23 (b) shows the internal structure of the ICS.
• ICS also has multiple button information capabilities.
• the button information corresponds to each button on the dialog control screen. Concrete In other words, when the movement key is pressed while the corresponding button has the focus, “neighbor_info” that indicates which button the focus movement is moved to, the normal state of the corresponding button, the selected state, etc. It consists of “statejnfo” indicating which ODS is used to represent each state, and “navigation command” to be executed by the playback device when the corresponding button is determined.
• FIG. 24 is a diagram illustrating an example of an IC S that defines dialogue control in a slide show.
• Statejnfo of Buttonjnfo (O) is specified to draw a triangle figure with "top” attached when the button ("top” button) corresponding to Buttonjnfo (O) is in the normal state.
• the “t op” button has focus (when it is in the selected state), it is stipulated that a triangle figure with “top” is drawn in an emphasized manner.
• the “top” button will be treated as a “top” button intended to skip to the first still image.
• Statejnfo of Buttonjnfo (l) is specified to draw a triangle figure with "+ ⁇ " when the button corresponding to Buttonjnfo (l) ("+ ⁇ button”) is in the normal state. .
• the “+1” button is specified to draw a triangular figure with “+ ⁇ ” in an emphasized manner. It is treated as a “+ ⁇ button, intended to skip to still images.
• Statejnfo of Button_info (2) stipulates that when the button ("-1, .., button) corresponding to Button_info (2) is in a normal state, a triangle figure with" -1 "is drawn. Also, when the "-1" button is in the selected state, it is stipulated to draw a triangle figure with "-1” in an emphasized manner. Is the scan to the previous still image. It will be treated as a "-1" button, intended for a ticket.
• State_nfo of Button_info (3) is specified to draw a triangle with "+10” when the button ("+10” button) corresponding to Button_info (3) is in the normal state. Yes.
• “+10” button is drawn in an emphasized manner. Due to strong rules, the “+10” button will be treated as a “+10” button, which is intended to skip to the still image after 10 frames.
• State_nfo of Button_info (4) is specified to draw a triangle with "-10” when the button corresponding to Button_info (4) ("-10" button) is in the normal state. Yes.
• the “-10” button is in the selected state, “-10” is drawn in an emphasized manner. According to the stipulated rules, the “-10” button will be treated as a “-10” button, which is intended to skip to the 10th previous still image.
• the neighborjnfo of Buttonjnfo (O) moves the focus to the “1” button that has the number “2” when the left key is pressed, and moves the focus to the “having the ⁇ number” + ⁇ button when the right key is pressed Prescribed,
• the neighborjnfo of Buttonjnfo (l) is specified to move the focus to the "top” button that has the number "0" when the up key is pressed, and to the "-1” button that has the number “2" when the left key is pressed. It is prescribed to move the focus and move the focus to the "+10” button with the number 3 when the right key is pressed.
• neighbor_nfo in Button_info (2) is changed to "-10" button with number 4 when the left key is pressed. It is specified to move the focus and move the focus to the "having the ⁇ number" + ⁇ button when the right key is pressed, and to move the focus to the "top” button having the "0" number when the upper key is pressed.
• the neighborjnfo of Button_info (3) is specified to move the focus to the + ⁇ button with the number “1” when the left key is pressed.
• FIG. 26 is a diagram showing state transition in the menu displayed in the slide show.
• the focus movement can be moved to the “-1” button (hhl).
• the focus movement can be moved to the" +10 "button (hh2). Furthermore, the focus movement to the" +10 "button When the left key is pressed in the presence of, the focus movement can be returned to the “+ ⁇ button (hh4). "When the up key is pressed in the state where the focus shift exists on the + ⁇ button, the force S can be moved to the" top “button (hh3).
• the "top” button, “+ ⁇ button”, “-1” button, “+10” button, “-10” button are the top, 1st, 1st, 10th, and 10th. It is intended to skip forward, and when these buttons are displayed, the focus movement on the button moves as the user presses the up / down / left / right key, so the "+ ⁇ button ⁇ " -10 " Any button can be selected by the user.
• the Buttonjnfo (O) navigation command is specified to execute Jmp PLMark (l) when a confirmation operation is performed on the "top” button.
• the Navigation command of Buttonjnfo (l) is specified to execute Jmp PLMark ( X + l) when a confirmation operation is performed on the "+ ⁇ button”.
• the Navigation command of Button_info (2) is specified to execute Jmp PLMark (x-1) when a confirmation operation is performed on the "-1" button.
• the Navigation command of Button_info (3) is specified to execute Jmp PLMark ( X +10) when a confirmation operation is performed on the "+10" button.
• These navigation commands specify PLMark as a branch destination.
• the numerical value in parentheses for PLMar k identifies the branch destination picture. That is, PLMark (l) is a PLMark indicating the first picture, and PLMark (x + l) is a PLMark indicating the x + 1th picture.
• PLMark (x-l) is a PLMark indicating the x-1th picture.
• PLMark (x + 10) is a PLMark indicating the x + 10th picture.
• PLMark (x-10) is a PLMark indicating the x-10th picture.
• the navigation command for each button information specifies these PLMark (l), (x + l), (x-l), (x +10), (x-10) as branch destinations. Therefore, when each button is confirmed, from the Xth still image, the first still image, the ⁇ + 1th still image, the x-1th still image, and the x + 10th still image Random access to the still image, x-10th still image will be made.
• FIG. 27 is a diagram showing branching by a slide show navigation command.
• the first level of the figure shows a plurality of pictures constituting the slide show and branches to these pictures.
• the second level is the time axis of the slide show
• the third level is the set entry map for the second level picture sequence
• the fourth level is the TS packet on the BD-ROM. Indicates a column.
• OmpPLMark (l) J mpPLMark (x + l), JmpPLMark (x—l), JmpPLMark (x + 10), JmpPLMark (x-10) indicates a branch symbolically. This branch causes the first still image, the next still image, the previous still image, the 10th still image, and the 10th previous still image. Since these branches are based on the navigation command shown in Fig. 24, the user can play back any still image by his / her own operation. Belongs to the IG stream It is description about a functional segment. This completes the description of the recording medium according to the present embodiment.
• FIG. 28 is a diagram showing the internal structure of the playback apparatus according to the second embodiment.
• the playback device includes PID Filter 20, Coded Data Buffer 21, Stream uraphics Processor 22, Object Buffer 23, Composition Buffer 24, ompo position Controller 25, Presentation Graphics player 27, Coded Data Buffer 31, Stream Graphics Processor 32, Object Buffer 33, Composition Buffer 34, Composition Controller 35, Intaractive Graphics plane 36, and composition unit 37 are provided.
• the PID Filter 20 determines whether the TS packet belongs to the video stream, PG stream, or IG stream by referring to the PID attached to the TS packet, Elementary Buffer 5, Coded Data Output to either Buffer 21 or Coded Data Buffer 31.
• the Coded Data Buffer (CDB) 21 is a buffer that stores the PES packets that make up the PG stream.
• the Stream Graphics Processor (SGP) 22 decodes the PES bucket (ODS) in which the graphics data is stored, and writes the uncompressed bitmap having index color power obtained by the decoding to the ObjectBuffer 23 as graphics data.
• SGP Stream Graphics Processor
• the Composition Buffer 24 is a memory in which control information (PCS) for drawing graphics data is arranged.
• PCS control information
• the ntroller 25 decodes the PCS placed in the Composition Buffer 24 and performs control based on the reading result.
• the Presentation Graphics plane 26 is a memory having an area for one screen, and can store uncompressed graphics for one screen.
• the resolution of this plane is 1920 x 1080, and each pixel of uncompressed graphics in the Presentation Graphics plane 26 is represented by an 8-bit index color.
• CLUT Color Lookup Table
• the combining unit 27 combines the uncompressed frame image stored in the video plane 7 and the uncompressed graphics data stored in the Presentation Graphics plane 26. By combining images, it is possible to obtain a combined image in which captions are superimposed on a moving image.
• Goded Data Buffer 2, Stream uraphics Processor 22, Object Buffer 2 d, Composition Buffer 24, Composition Controller 25, and Presentation Graphics plane 26 constitute a PG decoder for decoding the PG stream.
• the Composition Controller 25 determines whether or not the PCS Composition_State in the new Browsing Unit indicates Epoch Start. If the PCS Composition-State in the new Browsing Unit indicates Epoch Start, the PG decoder is reset. This reset is performed by clearing the contents of Coded Data Buffer 21, Object Buffer 23, omposition Buffer 24, and Presentation graphics plane 26.
• composition_state of the PCS is set to indicate Epoch Start in all Browsing Units, so the PG decoder is reset each time the individual Browsing Units that make up the Browsable SlideShow are read. The contents of all the buffers inside the decoder will be cleared.
• the Coded Data Buffer (CDB) 31 is a buffer in which the PES packets constituting the IG stream are stored.
• the Stream Graphics Processor (SGP) 32 decodes the PES packet that stores the graphics data, and writes the uncompressed bitmap composed of the index colors obtained by the decoding to the ObjectBuffer 33 as the graphics data.
• the Composition Buffer 34 is a memory in which control information for drawing graphics data is arranged.
• the Graphics Controller 35 decodes the control information arranged in the Composition Buffer 24 and performs control based on the decoding result.
• the compositing unit 37 includes uncompressed graphics data stored in the Interactive Graphics plane 36, and a composite image output from the compositing unit 27 (uncompressed picture data and the uncompressed Pre sentation Graphics plane 27). Is synthesized with graphics data).
• Coded Data Buffer 31, Stream uraphics Processor ⁇ 2, Ooject Buffer 33, ompositi on Buffer 34, Composition Controller 35, Intaractive Graphics Plane 36i, constitutes the IG decoder for decoding the IG stream.
• the composition controller 35 determines whether or not the composition_state of the ICS in the new browsing unit indicates Epoch Start. If the ICS Composition_State force Epoch Start in the new Browsing Unit is indicated, the IG decoder is reset. This reset is performed by clearing the Coded Data Buffer 31, Object Buffer 33, omposition Buffer 34, and Intaractive graphics plane 36.
• the IG decoder is reset each time the individual Browsing Units that make up the Browsable Slide Show are read. As a result, the contents of all the buffers inside the decoder will be cleared.
• the third embodiment is an embodiment for achieving high-speed display of picture data in chapter skip.
• FIG. 29 is a diagram illustrating a buffer state when a chapter skip is performed.
• the first level shows the buffer status of Read Buffer 1 and the second level Read Buffer 2 buffer status.
• chapter skip is requested in the middle of Tread-v in the first stage. Even if a chapter skip is requested at this time, the Read Bufferl must first be filled with the currently read picture data, so the Read Bufferl flash starts after the Read Bufferl becomes full. It will be. Then, the picture data requested by chapter skip is read out after one cycle, and one cycle must be passed before this picture data can be decoded. Therefore, the picture data requested by chapter skip is displayed after two cycles. In this embodiment, display delay of picture data at the time of chapter skip is eliminated. In order to eliminate this display delay, an improvement of the playback apparatus in this embodiment will be described.
• the supply rate Rmaxl from Read Buffer 1 to Elementary Buffer 5 is (192/188) X 48 Mbps in this embodiment.
• Rmaxl is only a low supply rate of (192/188) X 2 Mbps, whereas in this embodiment, Rmaxl is (1 92/188) X 48 Mbps! It is greatly enhanced, and it is powerful.
• Rmaxl is high, writing to Elementary Buffer 5 is done in bursts. Since the transfer to Elementary Buffer 5 is completed in a very short time, the picture data requested in chapter skip is displayed immediately.
• the size of the Browsing Unit in this embodiment is less than the sum of the capacities of Elementary Buffer 10, Code Data Buffer 21, and Code Data Buffer 31. Shall be set.
• Browsing Unit size Set the size of the Browsing Unit to satisfy
• the size of the picture data in the Browsing Unit is set to be equal to or smaller than the size of Elementary Buffer 5 in the video encoder as shown in Fig. 30 (a), and as shown in Figs. 30 (b) and (c).
• the total size of the functional segments belonging to the Browsing Unit is set below the size of the Coded Data buffers 21 and 31.
• FIG. 31 shows the buffer states of Read Buffer 1 and Read Buffer 2 in the internal configuration shown in FIG.
• the first level shows the buffer status of Read Buffer 1
• the second level shows the buffer status of Read Buffer 2. Since the supply rate Rmaxl to Elementary Buffer 5 is set to-(192/18 8) X 48 Mbps, it can be seen that the transfer to Elementary Buffer 5 is done in a very short time!
• FIG. 32 is a diagram showing changes in buffer states of Elementary Buffer 5 and Coded Data buffers 21 and 31 due to output from Read Buffer 1 in FIG.
• the first level shows the buffer status of Elementary Buffer 5 when picture data is transferred from Read Buffer 1 to Elementary Buffer 5
• the second and third levels show the status from Read Buffer 1 to Coded Data Buffers 21 and 31, respectively.
• the Browsing Unit includes complete picture data and functional segments that make up the complete Epoch, so the contents of Elementary Buffer5 and Coded Data Buffers 21 and 31 are transferred by high-rate transfer from Read Bufferl. , Has been replaced with a new one. This high-rate transfer makes it possible to replace Elementary Buffer 5, Coded Data Buffers 21, and 31 in response to chapter skipping, so that the next and previous picture data can be played back with captions according to chapter skip. it can.
• the IG stream in the Browsing Unit is a complete Epoch, and is smaller than the size of the Coded Data buffer 21, 31.When playing back a new picture, the function segment that existed in the buffer until then is used. None use it. All the functional segments that exist in the buffer in the IG stream are flushed and a new functional segment is sent. In this way, when skipping chapters, it is only necessary to flush the Coded Data buffers 21 and 31 and write new graphics data in bursts. In this way, chapter skip can be realized in response to user operations.
• the power that the optical disc according to the present invention is implemented as a BD-ROM.
• the recording medium of the present invention is characterized by EPjnap to be recorded. It does not depend on the physical properties. Any recording medium that can record EPjnap may be used. For example, it may be an optical disk such as DVD-ROM, DVD-RAM, DVD-RW, DVD-R, DVD + RW, DVD + R, CD-R, CD-RW, or a magneto-optical disk such as PD, MO. ! / ⁇ .
• a semiconductor memory card such as a compact flash card (registered trademark), a smart media, a memory stick, a multimedia card, and a PCM-CIA card.
• Magnetic disk such as flexible disk, SuperDisk, Zip, Clik! (Removable hard disk drive (ii) such as 0, ORB, Jaz, SparQ, SyJet, E ZFley, micro drive, etc.) It may be a built-in hard disk.
• the playback apparatus in all the embodiments is configured such that the power playback apparatus that has output the AVClip recorded on the BD-ROM and then output to the TV is only the BD-ROM drive. Elements may be included in the TV. In this case, the playback device and TV are connected via IEEE1394. Can be incorporated into a designated home network.
• the playback device in the embodiment may be a playback device that is integrated with a force display that is a type that is connected to a television.
• the system LSI integrated circuit
• the implementation of the program itself includes the act of producing these programs (1), the act of transferring the program for a fee or free of charge (2), the act of lending (3), the act of importing (4), both There is an act of offering to the public via a public electronic communication line (5), and an act of offering to the general user transfer or rental of the program by storefront, catalog solicitation, pamphlet distribution (6).
• the digital stream in each embodiment may be a force DVD-Video standard or DVD-Video Recording standard VOB (VideoObject) that was an AVClip of the BD-ROM standard.
• VOB is a program stream conforming to the ISO / I EC13818-1 standard obtained by multiplexing a video stream and an audio stream.
• the video stream in AVClip may be MPEG4 or WMV format.
• the audio stream may be a Linear-PCM system, a Dolby-AC3 system, an MP3 system, an MPEG-AAC system, or a dts system.
• StilLTime is a component of Playltem information. It may be provided for each audio data.
• the picture data display process is started as much as the time specified by StilLTime by starting the processing for displaying the picture data ahead of the seek time and the read time of the picture data. You may also switch between.
• the main stream and sub-stream in Browsable SlideShow are preferably arranged in 4200,000 sectors in one layer. It is desirable to arrange the main stream and substream in Browsable SlideShow continuously.
• G If TS_recording_rate (Rts2) ⁇ 2 Mbps in the substream, TS_recording_rate (Rtsl) ⁇ 15 Mbps in the main stream may be used.
• the optical disc and the playback apparatus according to the present invention may be used for personal use, such as use in a home theater system.
• the internal configuration of the present invention is disclosed in the above embodiment, and it is clear that the present invention is mass-produced based on this internal configuration, the optical disc and the playback device according to the present invention are produced in the industrial product production field. Or can be used. Therefore, the optical disc and the playback device according to the present invention have industrial applicability.

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• Engineering & Computer Science (AREA)
• Signal Processing (AREA)
• Multimedia (AREA)
• Signal Processing For Digital Recording And Reproducing (AREA)
• Television Signal Processing For Recording (AREA)
• Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

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