Recording medium, recording method, reproduction apparatus and method, and computer-readable program

• US 20060294543A1
• Filed: 08/23/2006
• Published: 12/28/2006
• Est. Priority Date: 06/30/2003
• Status: Active Grant

• Current Assignee: Hiroshi Yahata, Joseph Mccrossan, Tomoyuki Okada, Wataru Ikeda
• Original Assignee: Hiroshi Yahata, Joseph Mccrossan, Tomoyuki Okada, Wataru Ikeda
• Inventors: Okada, Tomoyuki, McCrossan, Joseph, Ikeda, Wataru, Yahata, Hiroshi
• Granted Patent: US 7,680,394 B2
• Time in Patent Office: Days
• US Class Current: 725/37
• CPC Class Codes: G11B 19/025 'Virtual' control panels, e.g. Graphical User Interface [GUI]
• CPC Class Codes: G11B 19/027 Remotely controlled remote control systems in general G08C
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 2220/213 Read-only discs
• CPC Class Codes: G11B 2220/2541 Blu-ray discs; Blue laser DVR discs
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/10 Indexing; Addressing; Timing or synchronising; Measuring tape travel
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/3027 used signal is digitally coded
• CPC Class Codes: G11B 27/322 used signal is digitally coded
• CPC Class Codes: G11B 27/329 on a disc [VTOC]
• 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
• CPC Class Codes: H04N 2005/91321 the copy protection signal being a copy protection control signal, e.g. a record inhibit signal
• CPC Class Codes: H04N 2005/91364 the video signal being scrambled
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/775 between a recording apparatus and a television receiver
• CPC Class Codes: H04N 5/781 on disks or drums
• CPC Class Codes: H04N 5/783 Adaptations for reproducing at a rate different from the recording rate
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 5/907 using static stores, e.g. storage tubes or semiconductor memories H04N5/91 takes precedence
• CPC Class Codes: H04N 9/8042 : involving data reduction
• CPC Class Codes: H04N 9/8063 : using time division multiplex of the PCM audio and PCM video signals
• CPC Class Codes: H04N 9/8205 : involving the multiplexing of an additional signal and the colour video signal
• CPC Class Codes: H04N 9/8227 : the additional signal being at least another television signal

Abstract

An AV Clip generated by multiplexing video and graphics streams is recorded on a BD-ROM. The graphics stream is a sequence of PES packets. The PES packets include ODSs (Object Definition Segments) carrying graphics data and PCSs (Presentation Control Segments) carrying control information. A PCS indicates that graphics data in a preceding ODS in the arrangement is to be displayed at a predetermined time in a state of being overlaid on the video stream. The PCS and the preceding ODS belong to different DSs, and the graphics data in the preceding ODS may be non-referenced graphics data that is not referenced by a PCS which belongs to the same DS as the preceding ODS.

Claims

1-15. -15. (canceled)

16. A recording medium used for storing data, comprising:

a digital stream generated by multiplexing a video stream and a graphics stream, wherein;

the graphic stream is a sequence of a plurality of packets which include a packet containing control information;

the control information indicates that graphic data contained in a preceding packet in the sequence is to be displayed at a predetermined time in a state of being overlaid on the video stream; and

the predetermined time is shown by a time stamp written in the packet.

17. The recording medium of claim 16, wherein;

each of the plurality of packets belongs to any of a plurality of display sets which are each used for reproducing a graphics display;

the graphics data and the control information belong to different display sets.

18. The recording medium of claim 17, wherein the display sets further comprises;

a Epoch Start DS having information necessary for displaying a next screen composition and is provided at the start of memory management on a reproduction time axis;

an Acquisition Point DS having information necessary for displaying a next screen composition; and

a Normal Case DS having difference information from a previous screen composition;

wherein the Epoch Start DS is provided at the start of a memory management on a reproduction time axis and the Acquisition Point DS and the Normal Case DS are provided at the point other than the start of the memory management; and

the graphic data belongs either to the Epoch Start DS or the Acquisition Point DS, and the control information belongs to the Normal Case DS.

19. The recording medium of claim 18, wherein;

the Epoch Start DS includes window information for specifying an area of displaying the graphic data;

the window information specifies a position, a height, and a width of a window on a screen, the window being an area in which the graphics data is to be rendered when overlaying the graphics data on the video stream; and

the predetermined time to display the graphic data contained in a preceding packet is set to a time to write the control information onto a memory plus a sum of a time required for clearing the window and a time required for writing the graphics on the window.

that graphic data contained in a preceding packet in the sequence is to be displayed

20. The recording medium of claim 19, wherein;

the time stamp of the packet having the control information is the presentation time stamp, and the packet further comprises the decode time stamp which shows the time to write the control information onto the memory.

21. A reproduction apparatus for reproducing a digital stream generated by multiplexing a video stream and a graphics stream, comprising:

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

;

a graphic decoder operable to decode the graphics stream to generate graphics, and overlay the graphics and the moving picture, wherein upon reading control information in the graphics stream, the graphics decoder displays graphics generated by decoding graphics data that precedes the control information in the graphics stream; and

the video stream is reproduced on reaching the time shown by the time stamp in the packet.

22. The reproduction apparatus of claim 21, wherein:

the graphics stream includes a plurality of display sets each of which is used for producing a graphics display;

upon reading the display set to which the graphics data belongs, the graphics decoder decodes the graphics data to generate the graphics and store the generated graphics to an object buffer.

23. The reproduction apparatus of claim 22, further comprising a plane memory for multiplexing the graphics and the video, wherein

the display sets further comprises;

a Epoch Start DS having information necessary for displaying a next screen composition and is provided at the start of memory management on a reproduction time axis;

an Acquisition Point DS having information necessary for displaying a next screen composition; and

a Normal Case DS having difference information from a previous screen composition;

wherein the Epoch Start DS is provided at the start of a memory management on a reproduction time axis and the Acquisition Point DS and the Normal Case DS are provided at the point other than the start of the memory management;

the graphic data belongs either to the Epoch Start DS or the Acquisition Point DS, and the control information belongs to the Normal Case DS;

the reproduction apparatus continuously manage the object buffer and the plane memory from one Epoch Start DS and before the next immediate Epoch Start DS on the reproduction time axis.

24. The recording apparatus of claim 23, wherein;

Epoch Start DS includes window information for defining an area of displaying the graphic data;

the window information specifies a position, a height, and a width of a window on a screen, the window being an area in which the graphics data is to be rendered when overlaying the graphics data on the video stream; and

the graphics decoder displays the graphics by clearing the window specified by the window information and writing the graphics into the window, and

the predetermined time to display the graphic data contained in a preceding packet is set to a time to write the control information onto a memory plus a sum of a time required for clearing the window and a time required for writing the graphics on the window.

25. The recording medium of claim 24, wherein;

the time stamp of the packet having the control information is the presentation time stamp, and the packet further comprises the decode time stamp which shows the time to write the control information onto the memory.

26. A method of recording onto a recording medium, comprising the steps of:

generating application data; and

recording the application data to the recording medium, wherein;

the application data includes a digital stream generated by multiplexing a video stream and a graphics stream;

the graphics stream is sequence of a plurality of packets which include a packet containing control information; and

the control information indicates that graphics data contained in a preceding packet in the sequence is to be displayed at a predetermined time in a state of being overlaid on the video stream, and

the predetermined time is shown by a time stamp written in the packet.

27. A computer-readable program used in a computer for reproducing a digital stream generated by multiplexing a video stream and a graphics stream, comprising:

program code operable to cause the computer to decode the video stream to generate a moving picture; and

program code operable to cause the computer to decode the graphics stream to generate graphics, and overlay the graphics and the moving picture, wherein

upon reading control information in the graphics stream, graphics which has been generated by decoding graphics data that precedes the control information in the graphics stream is displayed based on the control information, and

the video stream is reproduced on reaching the time shown by the time stamp in the packet.

28. A method of reproducing a digital stream generated by multiplexing a video stream and a graphics stream, comprising the steps of:

decoding the video stream to generate a moving picture; and

decoding the graphics stream to generate graphics, and overlaying the graphics and the moving picture, wherein

upon reading control information in the graphics stream, the step of decoding the graphics stream displays graphics which has been generated by decoding graphics data that precedes the control information in the graphics stream, based on the control information, and

the video stream is reproduced on reaching the time shown by the time stamp in the packet.