JP3864487B2 - Data reproducing apparatus and data reproducing method - Google Patents

Data reproducing apparatus and data reproducing method Download PDF

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Publication number
JP3864487B2
JP3864487B2 JP08565697A JP8565697A JP3864487B2 JP 3864487 B2 JP3864487 B2 JP 3864487B2 JP 08565697 A JP08565697 A JP 08565697A JP 8565697 A JP8565697 A JP 8565697A JP 3864487 B2 JP3864487 B2 JP 3864487B2
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Japan
Prior art keywords
angle
seamless
data
switching
video
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Expired - Fee Related
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JP08565697A
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Japanese (ja)
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JPH10271449A (en
Inventor
公嘉 水野
義則 清水
隆行 石田
亮 長谷川
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ソニー株式会社
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a DVD in which a program chain (PGC: Program Chain) composed of an integer number of programs (PG: Program) is recorded based on PGC information (PGCI: PGC Information) describing the essence and order of presentations. The present invention relates to a data reproducing apparatus and a data reproducing method for reproducing PGCI from a recording medium such as (Digital Versatile Disc / Digital Video Disc) and reproducing PGC based on PGCI.
[0002]
[Prior art]
An MPEG (Motion Picture coding Experts Group) system has been proposed as a system for compressing and encoding digital images and digital audio signals, and as a system for multiplexing. In addition, a DVD-VIDEO format has been proposed as a system for compressing and encoding digital images and digital audio signals by using the MPEG system, recording them on an optical recording medium, and reproducing them.
[0003]
In a DVD-VIDEO disc, a multi-channel multiplexed stream such as a video data stream for main video, an audio data stream for audio, and a sub-picture stream such as subtitles is recorded by a packet multiplexing method. Yes. The image information with different camera angles is divided into a plurality of interleaved units (ILVU: Interleaved Units) and recorded as interleaved multi-angle blocks. An angle function is realized in which any one of a plurality of channels or streams is selected and played back, and the channel or stream to be played back is switched during playback.
[0004]
[Problems to be solved by the invention]
That is, the volume structure of the DVD-VIDEO disc is defined as shown in FIG. 1, and the DVD-VIDEO zone in the volume space has one video manager (VMG) and one or more and 99 or less. Video title set (VTS). The VMG is located at the head of the DVD-VIDEO zone and consists of two or three files. The VTS is composed of 3 or more and 12 or less files.
[0005]
FIG. 2 shows the structures of VMG and VTS. In VMG, the first file is control data (VMGI: Video Manager Information), the next file is VOBS (VMGM_VOBS: VMGM Video Object Set) for menus, and the last file is a backup of VMGI. . VMGI is information for managing a VMG menu (VMGM: VMG Menu) and one or more VTSs.
[0006]
In the VTS, the first file is control data (VTSI: Video Title Set Information), and the next file is VOBS (VTSM_VOBS: VTSM Video Object Set) for the menu. The file is a VOBS (VTSTT_VOBS: VTSTT Video Object Set) for the title, and the last file is a backup of VTSI. The VTSI is information for managing a VTS menu (VTSM: Video Title Set Menu) and one or more titles (TT: Title) in the VTS.
[0007]
Here, the video object set (VOBS) is composed of one or more video objects (VOB) as shown in FIG. The VOB ID number (VOB_IDN: VOB ID number) is assigned from the VOB having the smallest logical sector number (LSN) in the VOBS. A VOB is composed of one or more shells (Cells). The shell ID number (C_IDN: Cell ID number) is assigned from the shell having the smallest logical sector number (LSN) in the VOB. The shell (Cell) is composed of an integer number of video object units (VOBU). A VOBU is an integer number of audio packs (A_PCK: Audio Pack), video packs (V_PCK: Video Pack), sub-picture packs (SP_PCK: Sub-picture Pack), and a navigation pack (NV_PCK: Navigation Pack) arranged at the top of the pack. Consists of.
[0008]
VOBs in VOBS include a contiguous block (CTGB) and an interleaved block (ILVB). CTGB is a single VOB positioned adjacent to each other as shown in FIG. The ILVB is composed of a plurality of interleaved VOBs as shown in FIG. Each VOB in ILVB is divided into a plurality of interleaved units (ILVU).
[0009]
Further, the NV_PCK includes a pack header, a system header, a PCI packet (PCI_PKT: Presentation Control Information packet), and a DSI packet (DSI_PKT: Data Search Information packet), as shown in FIG.
Presentation control information (PCI: Presentation Control Information) given as a PCI packet is navigation data for controlling the presentation of a VOBU. As shown in FIG. 7, the PCI includes PCI general information packet (PCI_GI), non-seamless angle information (NSML_AGLI), highlight information (HLI), and recording information. (RECI: Recording Information). As shown in FIG. 8, the PCI_GI includes a navigation block logical block number (NV_PCK_LBN: Logical Block number of Navigation Pack), a VOBU category (VOBU_CAT: Category of VOBU), and a VOBU user operation control (VOBU_UOP_CTL: User Operation control of). VOBU), VOBU presentation start time (VOBU_S_PTM: Start Presentation Time of VOBU), VOBU presentation end time (VOBU_E_PTM (End PTM of VOBU)), VOBU presentation end time (VOBU_SE_E_PTM: End PTM of sequence in VOBU) This is information such as shell elapsed time (C_ELTM: Cell Elapse Time), etc. NSML_AGLI is information on the switching destination in angle switching as shown in FIG. .
[0010]
Further, data search information (DSI: Data Search Information) given as the DSI packet is navigation data for seamless playback and search of VOBU. As shown in FIG. 10, this DSI includes DSI overall information (DSI_GI: DSI General Information), seamless playback information (SML_PBI), seamless angle information (SML_AGLI: Angle Information for seamless), VOBU search information (VOBU_SRI). : VOB Unit Search Information) and synchronization information (SYNCI: Synchronous Information). As shown in FIG. 11, DSI_GI includes NV_PCK_SCR (SCR_System Clock Reference of Navigation Pack), NV_PCK_LBN (Logical Block number of Navigation Pack), VOBU_EA (End address of VOBU), VOBU_1 STREF_EA (End address of the first reference picture in VOBU). , VOBU_2NDREF_EA (End address of the secnd Reference Picture in VOBU), VOBU_3RDREF_EA (End address of the third Reference Picture in VOBU), VOBU_VOB_IDN (VOB ID number of VOBU), VOBU_C_IDN (Cell ID number of Time VOBU) ) Etc. Here, the VOBU_1STREF_EA, VOBU_2NDREF_EA, and VOBU_3RDREF_EA are DSI packets having a relative logical block number (RLBN: Relative Logical Block number) from the first logical block (LB: Logical Block) LB of the VOBU of the DSI packet, as shown in FIG. VOBU_1STREF_EA indicates the address of the video pack of the last data of the reference image (first I picture) to be encoded first, which is recorded after the video pack (V_PCK: Video pack). VOBU_2NDREF_EA indicates the address of the video pack of the final data of the reference image (P picture), and VOBU_3RD_ indicates the address of the video pack of the final data of the reference image (P picture) to be encoded next. A show is.
[0011]
As shown in FIG. 13, the SML_PBI includes a seamless VOBU category (VOBU_SML_CAT: Category of seamless VOBU), an interleaved unit (ILVU) end address (ILVU_EA: End Address of Interleaved Unit), and the next ILVU. Start address (NXT_ILVU_SA: Start address of the next Interleaved Unit), next ILVU size (NXT_ILVU_SZ: Size of the next Interleaved Unit), video presentation start time in VOB (VOB_V_S_PTM: Video Start PTM in VOB), VOB Video presentation end time (VOB_V_E_PTM: Video End PTM in VOB), audio presentation stop time in VOB (VOB_A_STP_PTM: Audio Stop PTM in VOB), audio gap length in VOB (VOB_A_GAP_LEN: Audio Gap Length in VOB), etc. .
[0012]
Further, the SML_AGLI is information on the switching destination in the angle switching as shown in FIG. 14, and is effective only for seamless angle shell switching.
[0013]
The DVD-VIDEO disc employs a program chain (PGC) structure as shown in FIG. 15, and is an integer based on PGC information (PGCI: PGC Information) describing the essence and order of the presentation. Data is recorded as a program chain (PGC: Program Chain) composed of individual programs (PG: Program). The PGC is a logical unit that provides a menu or a title or a part thereof, and is configured based on PGCI. One PGC is divided into an integer number of PGs. The PG is a unit obtained by dividing the content of the PGC, and one PG is composed of an integer number of shells (Cells). The DVD-VIDEO disc playback device plays back PGCI and plays back PGC based on PGCI. PG is a collection of shells (Cells) defined in PGCI. The PGCI includes a pre-command area, a post-command area, and a presentation control block. The presentation control block provides navigation data for controlling the playback order of shells and VOB presentation.
[0014]
As shown in FIG. 16, the PGCI includes PGC overall information (PGC_GI: Program Chain General Information), PGC command table (PGC_CMDT: Program Chain Command Table), PGC program map (PGC_PGMAP: Program Chain Program Map), and shell playback information. A table (C_PBIT: Cell Playback Infomation Table) and a shell position information table (C_POSIT: Cell Position Information Table) are configured.
[0015]
As shown in FIG. 17, the contents of PGC_GI include PGC contents (PGC_CNT: PGC Contents), PGC playback time (PGC_PB_TM: PGC Playback Time), PGC user operation control (PGC_UOP_CTL: PGC Use Operation Control), PGC audio stream control table (PGC_AST_CTLT: PGC Audio stream Control Table), PGC sub-picture stream control table (PGC_SPST_CTLT: PGC Sub-picture stream Control Table), PGC navigation control (PGC_NV_CTL: PGC Navigation Control), PGC sub-picture palette (PGC_SP_PLT: PGC Sub-picture) Palette), PGC_CMDT start address (PGC_CMDT_SA: Start address of PGC_CMDT_SA), PGC_PGMAP start address (PGC_PGMAP_SA: Start address of PGC_PGMAP), PGC_PBIT start address (C_PBIT_SA: Start address of C_PBIT) and PGC_POSIT start Less: it has become a (C_POSIT_SA Start address of C_POSIT).
[0016]
The C_PBIT is a table that defines the order of presentation of shells (Cells) in the PGC, and shell playback information (C_PBI: Cell Playback Information) is continuously described as shown in FIG. Then, as shown in FIG. 19, this C_PBI includes a shell category (C_CAT: Cell Category), a shell playback time (C_PBTM: Cell Playback Time), and a start address (C_FVOBU_SA: Start address of the shell). First VOBU in Cell), end address of the first VOBU of the shell (Cell) (C_FVOBU_EA: End address of the First VOBU in Cell :), start address of the last VOBU of the shell (Cell) (C_LVOBU_SA: Start address of the Last VOBU in Cell) and the end address of the last VOBU of the shell (Cell) (C_LVOBU_SA: End address of the Last VOBU in Cell :).
[0017]
As described above, in a DVD-VIDEO disc, two types of data are recorded in the DVD-VIDEO zone: navigation data, that is, reproduction control data, and presentation data, that is, data for reproducing video, audio, sub-pictures, and the like. .
[0018]
Also, in such a DVD-VIDEO disc playback device, a first play domain (FP_DOM) generated by a special entry PGC executed at the time of initial access, such as after power-on or disc loading, and a title menu VMG menu domain (VMGM_DOM: VMG Menu Domain) used for each language in the VTS, VTS menu domain used for each VTS and each language appearing in the root menu, PTT menu, audio menu, sub-picture menu and angle menu (VTSM_DOM: VTS Menu Domain) and title domains (TT_DOM: Title Domain) used for each VTS and each title are defined, and each domain is defined according to navigation commands and user input. Transition So that the can. As shown in FIG. 20, there is no transition between FP_DOM in the state transition by the user's operation input, and transitions between the stop state (Stop State), VMGM_DOM, VTSM_DOM, and TT_DOM in accordance with the command are as follows. To do. The transition to VMGM_DOM or VTSM_DOM is caused by a Menu_Call () command that instructs the start of execution of the menu entry PGC specified by the menu ID. The transition to the stop state (Stop State) is caused by a Stop () command for instructing to stop the reproduction of PGC, and in VMGM_DOM and VTSM_DOM, it is also caused by a Resume () command for instructing return to the resume position. Also, the transition to TT_DOM is specified by the Title_Play () command for instructing the start of playback of the title specified by the title number, the PTT_Play () command for instructing the start of playback of the title specified by the PTT (Part_of_Title) number, and specified by the time. This is caused by a Time_Play () command instructing start of playback of the title to be played.
[0019]
Here, the DVD-VIDEO disc playback device is equipped with a memory called a track buffer for realizing variable rate playback. Of the playback data recorded on the disc for the multi-angle function, etc., a pickup is provided. The above memory absorbs the time to read out only the data required for playback of the video and audio selected by the user while the track jumps. Seamless playback can be performed.
[0020]
In the DVD angle function, a seamless angle stream and a non-seamless angle stream are defined. In the non-seamless angle stream, the angle, that is, the stream switching process, that is, the issuance of the switching command from the user, the new specified angle is specified. The playback is completed in a relatively short time, but the video, audio, and subtitles are temporarily stopped during switching, and intermittent playback is performed at the time of switching. This is called non-seamless angle switching processing. On the other hand, in the seamless angle stream, the time relationship is maintained between the streams having different angles, and a continuous reproduction output maintaining the time relationship can be obtained even when the angle is switched. Since seamless angle switching is performed using a track buffer, it takes a relatively long time from the issuance of a switching command from the user to the start of reproduction of a specified new angle.
[0021]
As described above, the DVD angle function has a seamless angle stream and a non-seamless angle stream. For example, if the angle is switched while a non-seamless angle block exists in the track buffer, the non-seamless angle stream in the track buffer is used. If the seamless angle block information is read after an angle switching event occurs and the event is processed only by the subject of the ankle switching, the past angle may be visible.
[0022]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a data reproducing apparatus and a data reproducing apparatus that can normally reproduce an image by switching the angle normally even when a plurality of multi-angle blocks are included in the track buffer. It is to provide a method.
[0023]
[Means for Solving the Problems]
The present invention relates to a data playback apparatus for playing back video object units in which image information having different angles is divided into a plurality of interleaved units, and the angle when a plurality of multi-angle blocks are contained in a track buffer. If a non-seamless angle block is being played on the presentation side when a switching event occurs , non-seamless angle switching is executed. If the non-seamless angle block is not being played on the presentation side, the interleaved block is read during seamless angle reading. A control procedure that controls event processing for angle switching so that seamless angle switching to the angle specified in the angle switching event is executed when the unit boundary is reached. And when the angle switching is designated a plurality of times from when the angle switching event occurs until the seamless angle switching is executed, the angle designated last in the angle switching event is designated. It is characterized by.
[0024]
The present invention is also a data playback method for playing back video object units in which image information having different angles is divided into a plurality of interleaved units, and the track buffer includes a plurality of multi-angle blocks. during the angle switching event occurs, execute the non-seamless angle switching, if playing the non-seamless angle block presentation side, if not playing the non-seamless angle block presentation side, said reading the seamless angle When the boundary of the interleaved unit is reached, seamless angle switching to the angle specified in the angle switching event is performed, and the seam is detected from the time when the angle switching event occurs. If the multiple angle change is designated by Suanguru switching is performed, characterized by an angle that is specified last specified Angle in the angle change event.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be described with reference to the drawings.
[0026]
The present invention is applied to, for example, an optical disc reproducing apparatus 100 having a configuration as shown in FIG. This optical disk reproducing apparatus 100 is an application of the present invention to a DVD-VIDEO disk reproducing apparatus, and includes a pickup 2 for reproducing an RF signal from a recording medium 1 on which data in accordance with the DVD format is recorded, An RF circuit 3 which is supplied with an RF signal reproduced by the pickup 2 and performs binarization processing of the RF signal; a data decoder 4 which is supplied with reproduction data from the RF circuit 3 and performs decoding processing such as error correction; And a demultiplexer 5 that distributes the reproduction data decoded by the data decoder 4 into main video compression data, sub-video compression data, and audio compression data.
[0027]
The optical disc playback apparatus 100 further includes a video decoder 6 that decompresses the main video compression data, a sub video decoder 7 that decompresses the sub video compression data and combines it with the main video data, and decompresses the audio compression data. Digital / NTSC, PAL conversion circuit (hereinafter simply referred to as NTSC conversion circuit) which is supplied with video data obtained by synthesizing main video data and sub-video data from the audio decoder 8 and the sub-video decoder 7 and converts them into NTSC signals or PAL signals. .) 9 and a digital / analog conversion circuit (hereinafter simply referred to as an A / D conversion circuit) 10 which is supplied with audio data from the audio decoder 8 and converts it into an analog signal.
[0028]
The DVD player 100 also controls the pickup 2, RF circuit 3, data decoder 4, demultiplexer 5, video decoder 6, sub-picture decoder 7, audio decoder 8, NTSC conversion circuit 9 and A / D conversion circuit 10. A controller 11, a user interface 12 that mediates the controller 11 and user operation input, and a memory 13 that serves as a data storage unit of the controller 11.
[0029]
The optical disc playback apparatus 100 plays back a read-only, write-once, rewritable DVD disc and DVD-VIDEO disc as the recording medium 1.
[0030]
The pickup 2 reproduces an RF signal from the recording medium 1 and supplies it to the RF circuit 3.
[0031]
The RF circuit 3 equalizes and binarizes the waveform of the RF signal to generate digital data and its synchronization signal. Digital data or the like generated by the RF circuit 3 is supplied to the data decoder 4.
[0032]
The data decoder 4 performs processing such as data demodulation and error correction based on the digital data generated by the RF circuit 3. The digital data demodulated by the data decoder 4 is supplied to the demultiplexer 5.
[0033]
The data decoder 4 detects system information in the MPEG2 format, parameter information included in a pack header, etc., predetermined information included in a navigation pack (NV_PCK: Navigation Pack) in the DVD format, and the like. The detected parameter information and the like are supplied from the data decoder 4 to the controller 11.
[0034]
The data decoder 4 is provided with a track buffer at the digital data output stage. This track buffer absorbs the difference in processing speed between the data decoder 4 and the demultiplexer 5.
[0035]
The demultiplexer 5 divides the digital data reproduced from the recording medium 1 that has been subjected to error correction decoding processing or the like by the data decoder 4 into main video compressed data, sub video compressed data, and audio compressed data.
[0036]
Here, the main video compressed data is video data compressed by the MPEG2 method, and is, for example, Video streams in the DVD format. The sub-picture compressed data is data such as subtitles synthesized with the main picture, and is, for example, Sub-picture streams in the DVD format. The audio compressed data is audio data compressed by a method such as MPEG2, and is an audio stream in the DVD format.
[0037]
The demultiplexer 5 supplies the main video compressed data to the video decoder 6, supplies the sub video compressed data to the sub video decoder 7, and supplies the audio compressed data to the audio decoder 8.
[0038]
The video decoder 6 performs decoding processing of the main video compressed data, and generates main video data expanded by the decoding processing. The video decoder 6 has an image memory for three screens in order to perform a decoding process. That is, using the image memory for these three screens, I picture, P picture, and B picture in the MPEG2 format are decoded onto the memory, and each decoded picture is output from the memory. Note that this image memory is not limited to three screens, and there may be more screens than this. The video decoder 6 supplies the generated main video data to the sub video decoder 7.
[0039]
The sub-picture decoder 7 performs a decoding process on the sub-picture compressed data, and synthesizes the decoded sub-picture data with the main picture data supplied from the video decoder 6 to generate video data. That is, the sub video decoder 7 synthesizes subtitle data or the like reproduced as sub video data with the main video. The sub video decoder 7 outputs the main video data as it is as video data when there is no sub video data. The sub video decoder 7 supplies the generated video data to the NTSC conversion circuit 9.
[0040]
The audio decoder 8 decodes the audio compression data to generate decompressed audio data. That is, if the audio compressed data is compressed in the MPEG2 format, the audio decoder 8 performs an expansion process corresponding to this and generates audio data. In addition to this MPEG2 format, if it is a format such as PCM, processing corresponding to this is performed. The audio decoder 8 supplies the generated audio data to the A / D conversion circuit 10.
[0041]
The NTSC conversion circuit 9 converts the video data from digital data into a television signal such as NTSC or PAL and outputs it. By supplying this output to a monitor or the like, the user can view the video reproduced from the recording medium 1.
[0042]
The A / D conversion circuit 10 converts audio data that is digital data into analog audio data and outputs the analog audio data. By supplying this output to a speaker or the like, it is possible to view the video reproduced from the recording medium 1 by the user.
[0043]
The controller 11 controls the pickup 2, RF circuit 3, data decoder 4, demultiplexer 5, video decoder 6, sub-picture decoder 7, audio decoder 8, NTSC conversion circuit 9 and A / D conversion circuit 10.
[0044]
The controller 11 receives an operation input via an operation panel or a user interface 12 which is a remote controller, and controls each circuit based on the operation input.
[0045]
The controller 11 stores each control data in the memory 13 and controls each circuit based on the data stored in the memory 13. That is, in this optical disc playback apparatus 100, the controller 11 uses an integer number of programs (PG: Program) based on PGC information (PGCI: PGC Information) describing the essence and order of presentations played back from the recording medium 1. In controlling the decoder 4 to reproduce the program chain (PGC: Program Chain), the reproduced PGCI is held in the cache area of the memory 13, and the PGCI of the PGC to be reproduced is held in the cache area. When this is done, the decoder 4 is controlled to reproduce the PGC by the PGCI held in the cache area.
[0046]
The controller 11 controls the seamless angle (SML_AGL) switching operation on the track buffer 4a side and the non-seamless angle (NSML_AGL) switching operation on the presentation side as follows.
[0047]
For the presentation side that performs the NSML_AGL switching operation, when an angle switching event occurs, the controller 11 performs control as shown in the flowchart of FIG. That is, in step S1, it is determined whether or not a non-seamless angle block (NSML_AGL_BLK) is currently being reproduced at point B at which NSML_AGL switching is performed on the presentation side.
[0048]
If the determination result in this step S1 is “NO”, that is, if NSML_AGL_BLK is not reproduced, the processing in this step S1 is repeated until NSML_AGL_BLK is sent, and the determination result in this step S1 is “YES”, that is, NSML_AGL_BLK When the reproduction operation is started, it is determined whether or not the angle number (AGLN: Angle number) designated last by the user is the same as the AGLN being reproduced (step S2).
[0049]
If the determination result in step S2 is “NO”, that is, if the angle number (AGLN: Angle number) specified by the user is different from the AGLN being played back, the process proceeds to step S3 to perform NSML_AGL switching processing. If the determination result in step S2 is “YES”, that is, if the angle number (AGLN) specified by the user is the same as the AGLN being played back, the process returns to step S1 without performing NSML_AGL switching processing. In the NSML_AGL switching process in step S3, the image is stopped, the buffer is cleared, and the search destination is changed to the angle number (AGLN: Angle number) designated last by the user.
[0050]
When the angle switching event occurs for the track buffer 4a side that performs the SML_AGL switching operation, the controller 11 performs control as shown in the flowchart of FIG. That is, in step S11, it is determined whether or not NSML_AGL_BLK is currently being reproduced at point B at which NSML_AGL switching is performed on the presentation side.
[0051]
If the determination result in step S11 is “YES”, that is, if NSML_AGL_BLK is being reproduced at point B, the event processing is terminated without performing the SML_AGL switching processing. If “NO” in step S11, that is, NSML_AGL_BLK is not reproduced at point B, the process proceeds to step S12, and the seamless angle block (SML_AGL_BLK: Seamless Angle Block) at point A where the SML_AGL switching operation is performed on the track buffer 4a side. Whether or not (Block) is being read is determined.
[0052]
If the determination result in step S12 is “NO”, that is, if SML_AGL_BLK is not read, the determination process in step S12 is repeated until SML_AGL_BLK is sent, and the determination result in step S12 is “YES”, that is, SML_AGL_BLK When reading is started, the process proceeds to step S13, where it is determined whether or not the boundary of an interleaved unit (ILVU) has been reached.
[0053]
If the determination result in step S13 is “NO”, that is, the boundary of ILVU has not been reached, the determination process in step S13 is repeated until the boundary of ILVU is reached, and the determination result in this step S13 is “YES”, that is, ILVU. When the boundary is reached, the process moves to step S14 to perform SML_AGL switching processing.
[0054]
In the SML_AGL switching process in step S14, the reading destination is changed to the angle number (AGLN: Angle number) designated last by the user.
[0055]
Then, in the next step S15, the process of determining whether or not the angle switching point has been recognized at the point B on the presentation side is repeated, and if the determination result is “YES”, that is, the angle switching point is recognized at the B point, The process ends.
[0056]
In this way, the processing on the track buffer 4a side that performs the seamless angle (SML_AGL: Seamless Angle) switching operation and the processing on the presentation side that performs the non-seamless angle (NSML_AGL) switching operation are handshaked, and the angle switching event When a non-seamless angle block is being played on the presentation side at the time of occurrence, non-seamless angle switching is executed. On the track buffer side, event processing for angle switching is terminated if a non-seamless angle block is being played on the presentation side. If the non-seamless angle block is not being played on the presentation side, seamless angle switching is performed when the ILVU boundary is reached during seamless angle reading, When the switching point is recognized on the presentation side, event processing for angle switching is terminated, so that even when multiple multi-angle blocks are in the track buffer, normal angle switching is performed and playback is normal. Images can be obtained.
[0057]
【The invention's effect】
In the data reproducing apparatus and the data reproducing method according to the present invention, a plurality of multi-values are stored in the track buffer by handshaking the processing on the track buffer 4a side for performing the seamless angle switching operation and the processing on the presentation side for performing the non-seamless angle switching operation. Even when an angle block is inserted, it is possible to obtain a normally reproduced image by switching the angle normally.
[Brief description of the drawings]
FIG. 1 is a diagram showing a volume structure in a DVD-VIDEO disc.
FIG. 2 is a diagram showing a structure of VMG and VTS in the volume structure.
FIG. 3 is a diagram illustrating a configuration of a VOBS.
FIG. 4 is a diagram showing a continuous block CTGB.
FIG. 5 is a diagram showing an interleaved unit ILVU.
FIG. 6 is a diagram showing a configuration of a navigation pack NV_PCK.
FIG. 7 is a diagram showing a configuration of presentation control information PCI.
FIG. 8 is a diagram illustrating a configuration of PCI overall information PCI_GI;
FIG. 9 is a diagram illustrating a state of angle switching by NSML_AGLI.
FIG. 10 is a diagram showing a configuration of data search information DSI.
FIG. 11 is a diagram illustrating a configuration of DSI overall information DSI_GI;
FIG. 12 is a diagram illustrating contents instructed by VOBU_1STREF_EA, VOBU_2NDREF_EA, and VOBU_3RDREF_EA of DSI.
FIG. 13 is a diagram illustrating a configuration of SML_PBI.
FIG. 14 is a diagram showing a state of seamless angle shell switching by SML_AGLI.
FIG. 15 is a diagram showing a program chain PGC structure employed in a DVD-VIDEO disc.
FIG. 16 is a diagram illustrating a configuration of PGCI.
FIG. 17 is a diagram illustrating a configuration of PGC_II.
FIG. 18 is a diagram illustrating a configuration of C_PBIT.
FIG. 19 is a diagram illustrating a configuration of C_PBI.
FIG. 20 is a diagram showing a state transition between domains in response to a user operation input in a DVD-VIDEO disc playback apparatus.
FIG. 21 is a block diagram showing a configuration of an optical disc reproducing apparatus to which the present invention is applied.
FIG. 22 is a flowchart showing a non-seamless angle switching control procedure on the presentation side by the controller when an angle switching event occurs in the optical disc playback apparatus.
FIG. 23 is a flowchart showing a control procedure of seamless angle switching on the track buffer side by the controller when an angle switching event occurs in the optical disc playback apparatus.
[Explanation of symbols]
1 recording medium, 2 pickup, 3 RF circuit 3, 4 data decoder, 5 demultiplexer, 6 video decoder, 7 sub-picture decoder, 8 audio decoder, 9 NTSC conversion circuit, 10 A / D conversion circuit, 11 controller, 12 user Interface, 13 memory, 100 optical disk playback device

Claims (2)

  1. A data playback device for playing back video object units in which image information with different angles is divided into a plurality of interleaved units,
    When an angle switching event occurs when there are multiple multi-angle blocks in the track buffer, if a non-seamless angle block is being played on the presentation side, non-seamless angle switching is executed, and a non-seamless angle block is displayed on the presentation side. If not playing, angle switching event processing is performed so that seamless angle switching to the angle specified in the angle switching event is executed when the boundary of the interleaved unit is reached during seamless angle reading. Comprising control means for controlling
    If angle switching is specified multiple times from the time of the angle switching event to the time when the seamless angle switching is executed, the last specified angle shall be the angle specified in the angle switching event. A data reproducing apparatus characterized by the above.
  2. A data reproduction method for reproducing interleaved video object units in which image information with different angles is divided into a plurality of interleaved units,
    When an angle switching event occurs when there are multiple multi-angle blocks in the track buffer, if a non-seamless angle block is being played on the presentation side, non-seamless angle switching is executed, and a non-seamless angle block is displayed on the presentation side. If not, the seamless angle switch to the angle specified in the angle switch event is performed when the boundary of the interleaved unit is reached during seamless angle reading.
    If angle switching is specified multiple times from the time of the angle switching event to the time when the seamless angle switching is executed, the last specified angle shall be the angle specified in the angle switching event. A data reproduction method characterized by the above.
JP08565697A 1997-03-20 1997-03-20 Data reproducing apparatus and data reproducing method Expired - Fee Related JP3864487B2 (en)

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Application Number Priority Date Filing Date Title
JP08565697A JP3864487B2 (en) 1997-03-20 1997-03-20 Data reproducing apparatus and data reproducing method

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JP3864487B2 true JP3864487B2 (en) 2006-12-27

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Publication number Priority date Publication date Assignee Title
KR20040000290A (en) 2002-06-24 2004-01-03 엘지전자 주식회사 Method for managing multi-path data stream of high density optical disc
US20040101283A1 (en) * 2002-11-22 2004-05-27 Seo Kang Soo Recording medium having data structure for managing reproduction of multiple reproduction path video data recorded thereon and recording and reproducing methods and apparatuses
KR100608051B1 (en) 2003-07-07 2006-08-02 삼성전자주식회사 Information storage medium for multi angle data, and recording method and reproducing apparatus thereof

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