KR20050006488A - Information storage medium containing attribute information of presentation stream, and reproducing method and apparatus thereof - Google Patents

Abstract

PURPOSE: An information storage media recording attribute of a presentation stream, and its reproducing method and apparatus are provided to offer data on audio and sub pictures much more to a user in a case that the user converts one audio and sub picture into another during a regeneration of a DVD title. CONSTITUTION: An information storage medium stores a presentation stream and description information. The presentation steam includes at least one of audio and sub pictures. The description information displays information on contents of at least one of the audio and the sub pictures. The contents on the audio and the sub pictures are a detailed description on the audio and the sub pictures. The description information is recorded in a reserved area of an attribute table for recording data attributed of the audio and the sub pictures. The description information can be recorded as a data file independent of the audio and the sub pictures or be included in the audio and the sub pictures.

Description

{Information storage medium containing attribute information of presentation stream, and reproducing method and apparatus}

The present invention relates to an information storage medium that records information on attributes of presentation data. More specifically, the present invention provides detailed information on presentation data so that attribute information on data currently being reproduced can be displayed in more detail. An information storage medium having recorded information, an information reproducing method, and a reproducing apparatus thereof.

While playing a DVD, a user can switch an audio channel currently being played to another audio channel or a current subpicture to another subpicture through a user input device. This is called a special transition. The conventional playback apparatus does not provide various detailed information on the contents of the audio or subpicture currently being played when such a special transition command is input. That is, the attribute information of the conventional audio or subpicture includes only limited information such as encoding information and language information.

1 is a diagram showing the structure of DVD data recorded in a DVD-zone.

The data structure recorded in the DVD-zone includes one Video Manager (VMG) 110 and a plurality of Video title sets (VTS: 120a to 120n). Each VTS includes VTS Information (VTSI: 121), Video Object for VMG Menu (VTSM_VOBS: 122), a plurality of Video Objects for title (VTSTT_VOBS: 123), and a backup for VTSI (VTSI_BUP: 124). At this time, there is a management table that records information about the VTSI 121, which is called a Video Title Set Information Management Table. FIG. 2 shows the Number of Audio streams of VTS (VTS_AST_Ns) in the Video Title Set Information Management Table (VTSI_MAT) of the DVD. ) Is a diagram showing that information is recorded.

VTS_AST_Ns means the number of audio streams of VTSTT_VOBS. VTS_AST_Ns can consist of 4 bits and have a value between 0 and 7, since DVD titles can logically store up to eight audio streams simultaneously. For example, an audio stream such as English Dolby Digital Surround, English Dolby Digital 5.1 Channel, French Dolby Digital Surround, and Korean Dolby Surround can be contained in a single DVD title. The attribute information of such an audio stream is recorded in the form of a predetermined audio stream attribute table.

Similar to Fig. 2, not only audio information but also subpicture information is recorded in the VTSI_MAT of the DVD. The Number of Sub-picture streams of VTS (VTS_SPST_Ns) recorded in VTSI_MAT consist of 6 bits and can have a value between 0 and 31, which means that DVD titles can logically store up to 32 subpicture streams simultaneously. Means that. Each subpicture stream contains 6 bytes of attribute information for that stream. However, while the user is playing a DVD title, he wants to switch the audio and / or subpicture stream to another audio and / or subpicture stream. When an input key for performing "Audio Switch" or "Sub-Picture Switch" of a user input device is pressed, the playback device is pressed every time the corresponding key is pressed (this switching method may be implemented differently for each playback device). Information on the audio and / or subpicture streams switchable in the DVD title is briefly displayed on the screen with reference to the attribute table as described above.

That is, the playback apparatus refers to the attribute table of the audio and / or subpicture, and displays only brief information on the screen such as "5.1-channel and AC3 audio in English" that the currently selectable audio is provided to the user. That is, there is a problem that can not provide a variety of information to the user. For example, if there is an audio stream such as "director's commentary" that contains not only the selection of an audio stream according to the multilanguage and the number of channels, such as a DVD, but also a comment that the director wants to talk about in the process of making a movie, the conventional attribute table is used. In this case, the audio stream that the user wants to select is either audio for "director's commentary" or audio included in the content of the movie, and only information about the coding scheme, the number of channels, and the language used is obtained. The problem is that not enough information is provided about the choice.

The technical problem to be achieved by the present invention is to include description information, which is detailed information about the stream, in the attribute table of the audio and / or subpicture stream, so that the detailed information on the content of the audio and / or subpicture stream can be obtained. The present invention provides a recording medium on which an audio and / or subpicture attribute table is provided, a reproducing method of the recording medium, and a reproducing apparatus capable of providing a user with the present invention.

1 is a diagram showing the structure of DVD data recorded in a DVD-zone.

FIG. 2 is a diagram showing that Number of Audio streams of VTS (VTS_AST_Ns) information is recorded in a Video Title Set Information Management Table (VTSI_MAT) of a DVD.

3 is a diagram illustrating an attribute table of an audio stream.

4 is a diagram showing details of contents recorded in attribute information of an audio stream.

5 is a diagram illustrating an audio attribute table and a subpicture attribute table including description information.

FIG. 6 is a diagram illustrating that attribute information of a specific stream is recorded together with the corresponding stream in adding description information.

7 is a flowchart of a method for reproducing the information storage medium of the present invention.

8 is a block diagram of a playback apparatus for playing back the information storage medium of the present invention.

In accordance with one aspect of the present invention, an information storage medium includes: a presentation stream including at least one of audio and subpicture data; And description information for displaying information provided to a user about at least one of the audio and the sub picture.

Preferably, the description information is recorded in a reserved area of an attribute table in which the attributes of the audio and subpicture data are recorded.

The description information is preferably recorded in the form of a data file independent of the audio and sub-picture data.

In addition, the description information is preferably included in the audio and sub picture data and recorded. To achieve the above object, the information reproducing method according to the present invention includes (a) at least one of audio and sub picture data. Reading and playing the presentation stream including one; And (b) displaying description information, which is information provided to a user, about the content of at least one of the audio and the sub picture together with the presentation stream.

In addition, in the step (b), it is preferable to read description information recorded in a data file format independent of the audio and sub-picture data, and display the description information along with reproduction of the presentation stream.

In addition, in the step (b), it is preferable to read description information contained in the audio and sub-picture data and display it together with reproduction of the presentation stream.

According to an aspect of the present invention, there is provided an information reproducing apparatus comprising: a stream reproducing unit configured to read and reproduce a presentation stream including at least one of audio and sub picture data; And an attribute information reproducing unit which displays, together with the presentation stream, description information which is information provided to a user about at least one of the audio and the sub picture.

The attribute information reproducing unit may read description information recorded in a data file type independent of the audio and sub picture data, and display the description information along with reproduction of the presentation stream.

Also, the attribute information reproducing unit may read description information contained in the audio and sub-picture data and display the same with the reproduction of the presentation stream.

In order to achieve the above object, the present invention provides a computer-readable recording medium recording a program for executing the method on a computer.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a diagram illustrating an attribute table of an audio stream.

The audio stream attribute table stores attribute information of up to eight audio streams. Attribute information for one audio stream is recorded in 8 bytes. Looking at the information contained in the attribute information for one audio stream in more detail as shown in FIG.

4 is a diagram showing details of contents recorded in attribute information of an audio stream.

That is, one VTS_AST_ATR of audio streams # 0 to # 7 each have 8 bytes of b0-b63 in the format shown in FIG. 4. Information stored in each field can be found in detail with reference to 4.2 Video Title Set Information of "DVD Specifications for Read-Only Disc Part 3 VIDEO SPECIFICATIONS Version 1.0". Referring to FIG. 4, it can be seen that there is a reserved area. In the present invention, detailed information about an audio stream is recorded in this reserved area. The subpicture attribute table stores up to 32 subpicture stream information. The VTS_SPST_ATR of subpicture streams # 0 to # 31, which are subpicture attribute information, consist of 6 bytes of b0-b47 and are stored in each field. Refer to 4.2 Video Title Set Information of "DVD Specifications for Read-Only Disc Part 3 VIDEO SPECIFICATIONS Version 1.0" for details. The reserved area here is used. In other words, when a user commands to switch an audio or subpicture stream to another audio or subpicture through a user input device while playing a specific title or a predetermined playback unit, detailed information about the stream to be selected is provided. do. To this end, "description information" has been added to the conventional audio and / or subpicture attribute information. That is, description information is recorded in the reserved area of the attribute information data of the audio stream known from FIG. 4. Therefore, the information storage medium on which the attribute information data of the audio stream of the present invention is recorded includes a plurality of audio and / or sub picture streams and description information on the corresponding audio and / or sub picture streams.

5 is a diagram illustrating an audio attribute table and a subpicture attribute table including description information.

That is, description information is added to the audio attribute table and the subpicture attribute table as shown in FIG. 5 to manage attribute information of the audio and / or subpicture as data separate from the presentation stream. In this way, when the user issues an audio and / or subpicture stream switching command while the DVD title is being played, the playback device can display the corresponding information on the display screen in more detail. This can be done by configuring the audio attribute table and the subpicture attribute table as shown in FIG. 5. By managing the attribute information as part of the navigation data separately from the presentation data, as shown in FIG. 5, one audio attribute table and the subpicture attribute table are included. Referring to "General Control Data", it is possible to refer to attribute information of all streams included therein, that is, attribute information of audio and subpicture or other streams.

FIG. 6 is a diagram illustrating that attribute information of a specific stream is recorded together with the corresponding stream in adding description information.

That is, attribute information of a specific stream is recorded in the audio stream and the subpicture stream, respectively. In this manner, when the stream is added or deleted, only the attribute information of the stream to be added or deleted needs to be added or deleted, so that the entire attribute information table needs to be re-created as if the attribute information is separately managed as shown in FIG. 5. It is simpler and easier to remove and add and delete information.

7 is a flowchart of a method for reproducing the information storage medium of the present invention.

The presentation stream including at least one of audio and subpicture data is read and reproduced (S710). The video is then displayed on the screen. Then, one audio stream or subpicture stream is selected and reproduced according to the user's selection. When the audio or subpicture stream is reproduced together with the video screen, description information, which is information provided to the user about the contents of the audio or subpicture stream, is displayed together with the presentation stream (S720).

In this case, the description information may be recorded in the form of a data file independent of the audio stream or the subpicture stream, or may be included in the audio stream or the subpicture stream and recorded. A block diagram of a playback device for reproducing a storage medium.

The playback apparatus includes a stream playback section 810 and attribute information playback section 820. The stream reproducing unit 810 reads and reproduces a presentation stream including at least one of audio and subpicture data. The video is then displayed on the screen. Then, one audio stream or subpicture stream is selected and reproduced according to the user's selection.

The attribute information reproducing unit 820 displays description information, which is information provided to the user, about the content of at least one of the audio and subpicture together with the presentation stream. The description information may be recorded in the form of a data file independent of the presentation stream or included in the presentation stream. The present invention may also be recorded on a computer-readable recording medium. It is possible to implement as readable code. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet). Include. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

As described above, by adding the description information according to the present invention to the attribute table, when the user switches to another audio or sub picture during the playback of the DVD title, more information about the converted audio or sub picture is provided to the user. Can be.

Claims (13)

A presentation stream comprising at least one of audio and subpicture data; And And description information for displaying information provided to a user about at least one of the audio and the sub picture. The method of claim 1, wherein the content of the audio and subpicture is Information storage medium characterized in that the detailed description of the contents of the audio and sub-picture. The method of claim 1, wherein the description information is And an information storage medium recorded in a reserved area of an attribute table in which the attributes of the audio and subpicture data are recorded. The method of claim 1, wherein the description information is And an information storage medium recorded in a data file type independently from the audio and sub picture data. The method of claim 1, wherein the description information is And an information storage medium recorded in the audio and sub picture data. (a) reading and playing a presentation stream including at least one of audio and subpicture data; And and (b) displaying description information, which is information provided to a user, about the content of at least one of the audio and the sub picture together with the presentation stream. The method of claim 6, wherein the content of the audio and subpicture is And a detailed description of the contents of the audio and subpicture. The method of claim 6, wherein step (b) And the description information recorded in a data file type independent of the audio and sub picture data is read and displayed together with the presentation stream. The method of claim 6, wherein step (b) And read description information contained in the audio and subpicture data and display the same with the reproduction of the presentation stream. A stream reproducing unit configured to read and reproduce a presentation stream including at least one of audio and subpicture data; And And an attribute information reproducing unit which displays, together with the presentation stream, description information which is information provided to a user about at least one of the audio and the sub picture. The method of claim 10, wherein the attribute information reproducing unit And read description information recorded in a data file type independent of the audio and sub picture data and display the presentation information together with the presentation stream. The method of claim 10, wherein the attribute information reproducing unit And read description information contained in the audio and subpicture data and display the same with the reproduction of the presentation stream. A computer-readable recording medium having recorded thereon a program for executing the method according to any one of claims 6 to 9.