RECORDING MEDIUM, PLAYBACK APPARATUS AND METHOD, RECORDING METHOD, AND COMPUTER-READABLE PROGRAM

• US 20100046932A1
• Filed: 10/28/2009
• Published: 02/25/2010
• Est. Priority Date: 11/12/2003
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: OKADA, TOMOYUKI, KOZUKA, MASAYUKI, McCROSSAN, JOSEPH
• Application Number:
  US12/607,765
• Publication Number:
  US 20100046932A1
• Time in Patent Office: Days
• US Class Current: 386/241
• CPC Class Codes: G11B 2220/2541 Blu-ray discs; Blue laser DVR discs
• CPC Class Codes: G11B 2220/2562 DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/3027 used signal is digitally coded
• CPC Class Codes: G11B 27/309 Table of contents
• CPC Class Codes: G11B 27/34 Indicating arrangements indicating means incorporated in magazine or cassette G11B23/046 and G11B23/0875; indicating measured values in general G01D

Abstract

A BD-ROM stores a video stream and a graphics stream. The video stream represents a moving picture. The graphics stream is used for overlaying a multi-page menu on the moving picture, and includes interactive control information (ICS) and graphics data (ODS) used for generating the multi page menu. A PTS attached to a PES packet containing the interactive control information shows timing for the first presentation of a main page the multi-page menu in accordance with the proceeding of the video stream playback. In addition, the interactive control information includes information (selection_time_out_pts) showing a timeout upon which a button on a page of the multi-page menu is automatically activated, and information (user_time_out_duration) showing a timeout upon which a sub-page of the multi-page menu is automatically removed.

Claims

1. A recording medium having recorded thereon a video stream and a graphics stream, wherein:

the graphic stream includes one or more interactive composition segments and object definition segments, each object definition segment defining a graphics object;

each interactive composition segment includes a plurality of pieces of page information;

the plurality of pieces of page information define display compositions for pages of a multi-page menu, and each page information includes one or more pieces of button information;

each piece of button information is used to present a graphics object as one state of a button material, so that each page of the multi-page menu is presented as an interactive display;

each interactive composition segment is encapsulated in a packet that is attached with a presentation time stamp and a decoding time stamp;

the decoding time stamp shows, on a playback time axis of the video stream, a time for a playback apparatus to start decoding the interactive composition segment; and

the presentation time stamp shows, on the playback time axis of the video stream, a time for the playback apparatus to first present a first page of the multi-page menu.

2. The recording medium according to claim 1, wherein:

each interactive composition segment belongs to a display set DSn, which is an n-th display unit in the graphics stream;

PTS(DSn[ICS]) denotes a value of a presentation time stamp attached to a packet containing an interactive composition segment belonging to DSn;

DTS(DSn[ICS]) denotes a value of a decoding time stamp attached to the packet containing the interactive composition segment belonging to DSn; and

the following equation is satisfied,

PTS(DSn[ICS])≧

PTS(DSn[ICS])+DECODEDURATION(DSn)+TRANSFERDURATION(DSn),

where a value of DECODEDURATION(DSn) shows a longer one of (i) a duration taken to decode all object definition segments included in DSn and (ii) a duration taken to clear a screen, and

where a value of TRANSFERDURATION(DSn) shows a duration taken to transfer graphics objects corresponding to all button materials to be presented on the first page.

3. The recording medium according to claim 1, wherein:

the first page includes a plurality of button materials,

a specific one of the button materials is presented in a selected state and the other button materials are presented in a normal state; and

the value of TRANSFERDURATION(DSn) is calculated by dividing (i) a total size of a graphics object used to present the selected state of the specific button material and graphics objects used present the normal state of the other button materials by (ii) a predetermined transfer rate of the playback apparatus.

4. The recording medium according to claim 1, wherein:

the value of TRANSFERDURATION(DSn) is calculated by dividing a size T of the set of uncompressed graphics by a transfer rate of the playback apparatus; and

the size T is calculated by a size TA+a size B−

a size NB, where

the size TA is a total size of graphics data associated with the normal state of each button material included in the first page,

the size B is a size of a button material LRG,

the size NB is a size of uncompressed graphics associated with the normal state of the button material LRG, and

the button material LRG is a button material of which uncompressed graphics is largest in data size, out of all of the button materials included in the first page.

5. A playback apparatus for playing back a video stream and a graphics stream, the playback apparatus comprising:

a video decoder operable to decode the video stream to obtain a moving picture; and

a graphics decoder operable to decode the graphics stream to obtain a first page and a second page,

wherein;

the graphic stream includes one or more interactive composition segments and object definition segments, each object definition segment defining a graphics object;

each interactive composition segment includes a plurality of pieces of page information;

the plurality of pieces of page information define display compositions for pages of a multi-page menu, and each page information includes one or more pieces of button information;

each piece of button information is used to present a graphics object as one state of a button material, so that each page of the multi-page menu is presented as an interactive display;

each interactive composition segment is encapsulated in a packet that is attached with a presentation time stamp and a decoding time stamp;

the graphics decoder is operable to (i) start the decoding when a current playback point reaches a point corresponding to the time shown by the decoding time stamp attached to the packet, and (ii) present the first page when the current playback point reaches a point corresponding to the time shown by the presentation time stamp attached to the packet.

6. The playback apparatus according to claim 5, further comprising:

a graphics plane operable to store graphics to be overlaid on the moving picture,

wherein;

the graphics decoder includes

a processor operable to decode graphics data included in the graphics stream, and

an object buffer operable to store uncompressed graphics obtained by the decoding by the processor;

each interactive composition segment belongs to a display set DSn, which is an n-th display unit in the graphics stream;

PTS(DSn[ICS]) denotes a value of a presentation time stamp attached to a packet containing an interactive composition segment belonging to DSn;

DTS(DSn[ICS]) denotes a value of a decoding time stamp attached to the packet containing the interactive composition segment belonging to DSn; and

the following equation is satisfied,

PTS(DSn[ICS])≧

PTS(DSn[ICS])+DECODEDURATION(DSn)+TRANSFERDURATION(DSn),

where a value of DECODEDURATION(DSn) shows a longer one of (i) a duration taken to decode all object definition segments included in DSn and (ii) a duration taken to clear the graphics plane, and

where a value of TRANSFERDURATION(DSn) shows a duration taken to transfer graphics objects corresponding to all button materials to be presented on the first page.

7. The playback apparatus according to claim 5, further comprising:

the first page includes a plurality of button materials,

a specific one of the button materials is presented in a selected state and the other button materials are presented in a normal state; and

the value of TRANSFERDURATION(DSn) is calculated by dividing (i) a total size of a graphics object used to present the selected state of the specific button material and graphics objects used present the normal state of the other button materials by (ii) a predetermined transfer rate of the playback apparatus.

8. The playback apparatus according to claim 5, further comprising:

the value of TRANSFERDURATION(DSn) is calculated by dividing a size T of the set of uncompressed graphics by a transfer rate of the playback apparatus; and

the size T is calculated by a size TA+a size B−

a size NB, where

the size TA is a total size of graphics data associated with the normal state of each button material included in the first page,

the size B is a size of a button material LRG,

the size NB is a size of uncompressed graphics associated with the normal state of the button material LRG, and

the button material LRG is a button material of which uncompressed graphics is largest in data size, out of all of the button materials included in the first page.

9. A method for recording onto a recording medium, the method comprising:

generating application data; and

recording the application data onto the recording medium, wherein;

the application data includes a video stream and a graphics stream;

the graphic stream includes one or more interactive composition segments and object definition segments, each object definition segment defining a graphics object;

each interactive composition segment includes a plurality of pieces of page information;

the plurality of pieces of page information define display compositions for pages of a multi-page menu, and each page information includes one or more pieces of button information;

each piece of button information is used to present a graphics object as one state of a button material, so that each page of the multi-page menu is presented as an interactive display;

each interactive composition segment is encapsulated in a packet that is attached with a presentation time stamp and a decoding time stamp;

the decoding time stamp shows, on a playback time axis of the video stream, a time for a playback apparatus to start decoding the interactive composition segment; and

the presentation time stamp shows, on the playback time axis of the video stream, a time for the playback apparatus to first present a first page of the multi-page menu.

10. A computer program used for enabling a computer to play back a video stream and a graphics stream, comprising code operable to cause the computer to:

decode the video stream to obtain a moving picture; and

decode the graphics stream to obtain a first page and a second page,

wherein;

the graphic stream includes one or more interactive composition segments and object definition segments, each object definition segment defining a graphics object;

each interactive composition segment includes a plurality of pieces of page information;

the plurality of pieces of page information define display compositions for pages of a multi-page menu, and each page information includes one or more pieces of button information;

each piece of button information is used to present a graphics object as one state of a button material, so that each page of the multi-page menu is presented as an interactive display;

each interactive composition segment is encapsulated in a packet that is attached with a presentation time stamp and a decoding time stamp; and

in said decoding of the graphics stream, the decoding is started when a current playback point reaches a point corresponding to the time shown by the decoding time stamp attached to the packet, and the first page is presented when the current playback point reaches a point corresponding to the time shown by the presentation time stamp attached to the packet.

11. A method for playing back a video stream and a graphics stream, the method comprising:

decoding the video stream to obtain a moving picture; and

decoding the graphics stream to obtain a first page and a second page,

wherein;

the graphic stream includes one or more interactive composition segments and object definition segments, each object definition segment defining a graphics object;

each interactive composition segment includes a plurality of pieces of page information;

the plurality of pieces of page information define display compositions for pages of a multi-page menu, and each page information includes one or more pieces of button information;

each piece of button information is used to present a graphics object as one state of a button material, so that each page of the multi-page menu is presented as an interactive display;

each interactive composition segment is encapsulated in a packet that is attached with a presentation time stamp and a decoding time stamp; and

in said decoding of the graphics stream, the decoding is started when a current playback point reaches a point corresponding to the time shown by the decoding time stamp attached to the packet, and the first page is presented when the current playback point reaches a point corresponding to the time shown by the presentation time stamp attached to the packet.