KR100930350B1 - Data stream management method of high density optical disc - Google Patents

Abstract

The present invention relates to a data stream management method for a high density optical disc, comprising: recording management of a plurality of play items for controlling playback of audio and video data streams recorded on a high density optical disc such as a reproduction-only Blu-ray disc (BD-ROM); In addition, navigation information for identifying the type of video data associated with the play item is recorded and managed for each play item, so that still picture data and movie video data recorded on a high-density optical disc can be adapted to the characteristics of the data. The present invention is a very useful invention that enables asynchronous playback or synchronous playback with corresponding audio data, and also enables seamless connection playback between still picture data and movie video data.

Description

Method for managing data stream of high density optical disc             

1 shows a file structure for a rewritable Blu-ray Disc (BD-RE),

FIG. 2 shows a linkage state between a playlist file, a clip file, and a clip information file of a rewritable Blu-ray Disc (BD-RE),

3 shows a file structure of a playback-only Blu-ray disc (BD-ROM) according to the present invention.

4 is a diagram illustrating an association state between play items and data streams of a playback-only Blu-ray disc according to the present invention;

FIG. 5 is a table illustrating definitions of MS_Condition information according to the present invention.

6 shows a configuration of an optical disk device to which the present invention is applied.

※ Explanation of code for main part of drawing

10: optical disc 11: optical pickup                 

12: VDP system 13: micom

14: Memory

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data stream management method of a high density optical disc such as a reproduction-only Blu-ray Disc ROM (BD-ROM).

In recent years, the standardization of new rewritable high-density optical discs, such as Blu-ray Disc Rewritable (BD-RE), which can record and store high-quality video data and high-quality audio data for a long time, is rapidly progressing. As it progresses, it is expected that related products will be developed and released and commercialized.

On the other hand, the file structure of the BD-RE, as shown in Figure 1, has at least one DVR directory under the root directory of the top, one 'info.dvr' file, 'menu.tidx' PLAYLIST directory containing files and 'mark.tidx' files, and also including a plurality of play list files (* .rpls, * .vpls), and a CLIPINF directory including a plurality of clip information files (* .clpi). And a file structure for storing a plurality of clip files corresponding to each clip information file, that is, a STREAM directory including recorded clip files (* .m2ts) in which MPEG / A format A / V streams are recorded. .

In addition, various reproduction control information for the clip file included in the STREAM directory, for example, the file '01001.m2ts' and the file '02000.m2ts', are stored in the file '01001.clpi' recorded in the ClLIP directory. The playlist information may be recorded and stored in the '02000.clpi' file, and the playlist information for determining the connection playback and the playback order for the '01001.m2ts' file and the '02000.m2ts' file is included in the PLAYLIST directory. It can be recorded and stored in the file '01001.rpls' to be recorded.

 As shown in FIG. 2, an A / V stream recorded and stored in the BD-RE, for example, an A / V stream of a clip recorded and stored in a clip unit with a temporal continuity. Is recorded and reproduced by the actual play list (Real PlayList) of the BD-RE, the virtual play list (Virtual PlayList) set for user editing, and the like, and the clip information file (Clip Info File).

therefore. In the optical disc apparatus for reading and reproducing the A / V stream recorded and stored on the BD-RE as described above, the A / V stream of the clip managed by the actual play list, the virtual play list, and the clip information file is reproduced. A series of playback operations are performed.

Recently, development and standardization of high-density optical discs such as reproduction-only high-density optical discs, for example, reproduction-only Blu-ray discs (BD-ROMs), are in progress. Still pictures recorded and stored on the BD-ROM Data and Movie Video data can be Async Playback or Synchronous Playback with the corresponding audio data in accordance with the characteristics of the data, and the still picture. Since there is no effective solution yet to enable seamless connection reproduction between data and movie video data, it is urgently needed to prepare such a solution.

Therefore, the present invention was created in view of the above situation, and asynchronous reproduction of still picture data and movie video data recorded and stored on a high-density optical disc such as a reproduction-only Blu-ray disc (BD-ROM) It is an object of the present invention to provide a method for managing a data stream of a high density optical disc for synchronous reproduction, and for continuous connection reproduction between the still picture data and movie video data.

The data stream management method of the high density optical disc according to the present invention for achieving the above object, records and manages a plurality of play items for controlling playback of audio and video data stream recorded on the high density optical disc, Characterized in that the navigation information for identifying the type of the associated video data is recorded and managed for each play item,

In addition, the high density optical disc according to the present invention has a plurality of play items for recording and controlling the playback of audio and video data streams recorded on the high density optical disc, and a navigation capable of identifying the type of video data associated with the play items. Characterized in that the information is recorded for each play item,                     

In addition, the method for managing a data stream of a high density optical disc according to the present invention refers to a type of video data associated with a current play item and a next play item with reference to navigation information recorded in a play item or a play list of the high density optical disc. Determining a first step; And selectively performing a synchronous reproduction operation between the audio data and the video data according to the determined type of video data.

Hereinafter, a preferred embodiment of a data stream management method of a high density optical disc according to the present invention will be described in detail with reference to the accompanying drawings.

First, the data stream management method according to the present invention may be applied to, for example, a process of authoring a BD-ROM, and may also be applied to an optical disc apparatus for reproducing the BD-ROM. As shown in Fig. 3, the ROM places at least one BD-ROM directory under the root directory of the top, an 'info.dvp' file, etc., and a plurality of playlist files (* .rpls). Or a PLAYLIST directory in which * .vpls) are recorded, a CLIPINF directory in which a plurality of clip information files (* .clpi) are recorded, and a plurality of clip files (* .m2ts) corresponding to each clip information file. It can have a file structure that puts a STREAM directory into it.

On the other hand, as shown in FIG. 4, data streams such as still picture data, audio data, and movie video data recorded and stored on the BD-ROM are recorded as MPEG2 transport streams, and the data streams. A plurality of play items PlayItems are included and recorded in a play list PlayList for controlling playback.

In addition, the plurality of play items, for example, the first and second play items PlayItems 1 and 2 are respectively linked to still pictures and audio data, and a third play item PlayItem. 3) may be linked to movie video and audio data, and the fourth play item PlayItem 4 may be linked to still picture and audio data.

Each play item includes navigation information newly defined by the present invention, for example, MS_Condition information, or MS condition information for each play item in a play list including the play items. The MS_Condition information may be recorded and managed as flag bits (b0b1) of two or more bits, as shown in FIG.

For example, among the MS_Condition information, a first bit b0 is a flag bit indicating whether video data associated with a current PlayItem is still picture data or movie video data, and the MS_Condition Among the information, the second bit b1 is a flag bit for indicating whether the video data associated with the next PlayItem is still picture data or movie video data.                     

On the other hand, as shown in FIG. 6, in the optical disc apparatus including the optical pickup 11, the VDP (Video Disc Play) system 12, the microcomputer 13, the memory 14, and the like, the play item or play is performed. With reference to the MS_Condition information included in the list, a series of data reproduction operations corresponding thereto are performed.

For example, when the MS_Condition information is 'b0b1 = 11', it indicates that both the current play item and the next play item are associated with the movie video data, so that the corresponding movie video data is synchronized with the audio data. Sync Playback will be performed.

In addition, when the MS_Condition information is 'b0b1 = 10', it indicates that the current play item is associated with the movie video data and the next play item is associated with the still picture data. In addition to synchronous playback of movie video data along with audio data, it is also possible to select and switch the appropriate still decoding mode for continuous connection playback of still picture data corresponding to the next play item. do.

When the MS_Condition information is 'b0b1 = 01', it indicates that the current play item is associated with still picture data and the next play item is associated with movie video data. In addition to asynchronous playback of picture data with audio data, a suitable movie decoding mode is selected so as to continuously connect and play back movie video data corresponding to the next play item. .                     

In addition, when the MS_Condition information is 'b0b1 = 00', it indicates that both the current play item and the next play item are associated with still picture data, and thus the corresponding still picture data is asynchronously reproduced together with the audio data. (Async Playback).

Therefore, in the optical disk apparatus, the still picture data and the audio data can be asynchronously reproduced or the movie video data and the audio data can be synchronously reproduced with reference to the first flag bit b0 of the MS_condition information. With reference to the second flag bit (b1) of the MS_condition information, by quickly switching the decoding mode suitable for the still picture video or movie video data to be reproduced by the next play item, the sequence between the still picture data and movie video data Connection playback can be performed.

As mentioned above, the above-described preferred embodiment of the present invention is disclosed for the purpose of illustration, and can be extended to other optical discs other than the BD-ROM, for example, a rewritable optical disc such as a BD-RE, etc. Within the spirit and scope of the present invention disclosed in the appended claims, various other embodiments may be improved, changed, replaced or added.

The data stream management method of the high density optical disc according to the present invention made as described above records a plurality of play items for controlling the reproduction of audio and video data streams recorded on a high density optical disc such as a reproduction-only Blu-ray disc (BD-ROM). In addition, by managing and recording navigation information for identifying each type of video data associated with the play item for each play item, the still picture data and the movie video data recorded on the high-density optical disc are compared with the corresponding audio data. It is a very useful invention to be able to perform synchronous reproduction or synchronous reproduction, and also to perform continuous connection reproduction operation between still picture data and movie video data.

Claims (16)

In addition to recording management of a plurality of play items for controlling playback of audio and video data streams recorded on an optical disc, And managing navigation information for identifying each type of video data associated with each play item and the next play item, for each play item. The method of claim 1, The optical disc is a reproduction-only Blu-ray disc, and the navigation information is recorded in each play item or recorded in a play list including each play item. The method of claim 1, The navigation information indicates whether the video data associated with the corresponding play item is still picture data or movie video data, and is recorded as two or more flag bits indicating the type of video data associated with the next play item. The data stream management method of an optical disc. In addition to recording a plurality of play items for controlling playback of audio and video data streams recorded on an optical disc, And navigation information for identifying each type of video data associated with each play item and the next play item, for each play item. The method of claim 4, wherein The optical disc is a reproduction-only Blu-ray disc, and the navigation information is recorded in each play item or in a play list including each play item. The method of claim 4, wherein The navigation information indicates whether the video data associated with the play item is still picture data or movie video data, and is recorded with two or more flag bits indicating the type of video data associated with the next play item. An optical disc characterized by the above. Determining a type of video data associated with a current play item and a next play item, with reference to navigation information recorded in a play item or a play list of the optical disc; And And two steps of selectively performing a synchronous reproduction operation between the audio data and the video data according to the type of the determined video data. The method of claim 7, wherein In step 1, the type of video data associated with a current play item and a next play item, respectively, with reference to the navigation information, determines whether the picture type is still picture data or movie video data. Stream management method. The method of claim 8, In the second step, if the video data associated with the current play item is still picture data, the asynchronous playback operation between the audio data and the still picture data is performed. The method of claim 8, In the second step, when the video data associated with the current play item is movie video data, the synchronous reproduction operation between the audio data and the movie video data is performed. The method of claim 8, And said step 2 selects and switches between a still picture decoding mode and a movie video decoding mode according to the type of video data associated with said next play item. Reproducing means for reproducing data recorded on the optical disc; And Operation control of the playback means to determine the type of video data associated with the current play item and the next play item, with reference to the navigation information recorded in the play item or play list of the optical disc, And control means for selectively performing and controlling a synchronous reproduction operation between audio data and video data according to the determined type of video data. The method of claim 12, And the control means determines whether the type of video data associated with the current play item and the next play item is still picture data or movie video data, with reference to the navigation information. The method of claim 12, And the control means controls to perform asynchronous reproduction operation between the audio data and the still picture data when the video data associated with the current play item is the still picture data. The method of claim 12, And the control means controls to perform a synchronous reproduction operation between the audio data and the movie video data when the video data associated with the current play item is movie video data. The method of claim 12, And said control means selects and switches between a still picture decoding mode and a movie video decoding mode according to the type of video data associated with said next play item.

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