Optical disc for which a sub-picture can be favorably superimposed on a main image and a disc reproduction apparatus and a disc reproduction method for the disc

• US 6,393,202 B1
• Filed: 05/13/1999
• Issued: 05/21/2002
• Est. Priority Date: 05/09/1996
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Yamauchi, Kazuhiko, Saeki, Shinichi, Miwa, Katsuhiko, Kozuka, Masayuki, Murase, Kaoru
• Primary Examiner(s): Boccio, Vincent F.
• Application Number:
  US09/311,019
• Time in Patent Office: 1,104 Days
• Field of Search: H04/N.591, H04/N.708, 386/46, 386/95, 386/99, 386/123, 386/124, 386/125, 386/126, 386/131, 386/47, 386/96, 369/47, 369/275.3
• US Class Current: 386/240
• CPC Class Codes: G11B 19/022 Control panels
• 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 27/329 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 21/4221 Dedicated function buttons, e.g. for the control of an EPG, subtitles, aspect ratio, picture-in-picture or teletext
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/4884 for displaying subtitles
• CPC Class Codes: H04N 5/04 Synchronising for television systems using pulse code modulation H04N7/56
• CPC Class Codes: H04N 5/2628 Alteration of picture size, shape, position or orientation, e.g. zooming, rotation, rolling, perspective, translation
• CPC Class Codes: H04N 5/445 for displaying additional information H04N5/50 takes precedence
• CPC Class Codes: H04N 5/45 Picture in picture , e.g. displaying simultaneously another television channel in a region of the screen
• CPC Class Codes: H04N 5/602 for digital sound signals
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 5/9208 involving the use of subcodes
• CPC Class Codes: H04N 5/9264 using transform coding
• CPC Class Codes: H04N 7/0122 the input and the output signals having different aspect ratios
• CPC Class Codes: H04N 9/7921 for more than one processing mode
• 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

A multimedia optical disc for recording main video data which is composed of sets of frame data that is processed beforehand to allow compatibility with displays of a plurality of aspect ratios. The disc has a stream area storing streams made up of the main video data and a plurality of sets of sub-picture data, with each set of sub-picture data including a set of tel-op data and a set of coordinate information showing a display position of the set of tel-op data. The disc also includes a control area storing a plurality of pairings of a set of display mode information and a set of sub-picture indicating information. Each set of display mode information shows a species of display method according to which the frame data is to be processed for a case when the frame data decoded from the main video data is displayed at one of the plurality of aspect ratios. Each set of sub-picture indicating information shows a set of sub-picture data, out of the plurality of sets of sub-picture data in a same stream as the main video data, which includes a set of coordinate information which coincides with the species of display method shown by the display mode information.

Claims

1. An optical disc comprising:

a stream area for storing a plurality of video objects including at least one set of video data and a plurality of sets of sub-picture data to be reproduced with the set of video data selectively; and

a control area for storing a set of management information for controlling reproduction of data on the disc wherein;

the set of sub-picture data includes a set of image data and a set of coordinate information indicating a display position of the set of image data; and

the set of management information includes a set of mapping information indicating pairs of a set of display mode information and a set of the sub-picture indicating information, and a set of mapping information corresponding to the video object; and

the set of display mode information indicates one of a plurality of display methods when each frame of the video data is displayed at one of a plurality of aspect ratios; and

the set of sub-picture indicating information indicates a set of sub-picture data, out of a plurality of sets of sub-picture data in the same video object which includes a set of coordinate information which coincides with one of the display methods indicated by the set of display mode information.

2. An optical disc as claimed in claim 1, wherein set of management information further includes a set of program chain information which indicates a reproduction order of the video objects, and the set of mapping information corresponds to video objects indicated by a set of the program chain information.

3. An optical disc as claimed in claim 2, wherein the plurality of aspect ratios includes 4:

3 and 16;

9.

4. An optical disc as claimed in claim 2, wherein the plurality of display methods includes a pan scan method and a letter box method,

wherein the pan scan method enables display of each frame of video data with an aspect ratio 16: 9 on a display screen with an aspect ratio of 4;

3 after trimming to give 4;

3 aspect ratio image of moving picture,

wherein the letter box method enables display of each frame of video data with an aspect ratio 16;

9 on a display screen with an aspect ratio of 4;

3 after resizing to give 4;

3 aspect ratio image of the moving picture.

5. A reproduction apparatus for an optical disc as claimed in claim 1, comprising:

a reading means capable of reading the video object and a set of the mapping information from the optical disc;

a display setting register for storing display mode information indicating one of the display methods;

a video decoder for decoding a set of video data included in the video object and for processing a frame of the decoded set of video data at one of the display methods;

a sub-picture decoder for decoding one set of image data out of a plurality of sets of sub-picture data included in the video object, and for arranging the decoded set of image data onto the processed frame; and

a controller for controlling the reading means, the video decoder and the sub-picture decoder wherein the controller is arranged;

to control the reading means to read the video object and a set of the mapping information from the optical disc;

to control the video decoder to decode a set of video data included in the read video object, and to process a frame of the decoded set of video data in accordance with the display mode information stored in the display setting register;

to determine one sub-picture data out of a plurality of sets of sub-picture data included in the read video object, in accordance with the set of sub-picture indicating information in the read set of mapping information, which coincides with the display mode information stored in the display setting register; and

to control the sub-picture decoder to decode a set of image data included in the determined set of sub-picture data, and to arrange the decoded set of image data onto the processed frame.

6. A reproduction apparatus for an optical disc as claimed in claim 5 wherein the set of management information further includes a set of program chain information which indicates a reproduction order of the videos objects, and the set of mapping information corresponds to video objects indicated by a set of the sub-picture indicating information, and the controller is arranged to control the reading means to read a set of program chain information and to read the set of mapping information corresponding to the read set of program chain information from the optical disc.

7. A reproduction method for an optical disc as claimed in claim 1 comprising the steps of:

reading the video object, and a set of the mapping information from the optical disc;

storing display mode information indicating one of display methods;

decoding a set of video data included in the video object and processing a frame of the decoded set of video data at one of the display methods;

decoding one set of image data out of a plurality of sets of sub-picture data included in the video object, and arranging the decoded set of image data onto the processed frame; and

controlling the reading and decoding of video data and sub-picture data wherein the controlling step is arranged;

to control reading of the mapping information from the optical disc;

to control decoding of a set of video data included in the read video object, and to process a frame of the decoded set of video data in accordance with the display mode information stored in the display setting register;

to determine one sub-picture data out of a plurality of sets of sub-picture data included in the read video object, in accordance with the set of sub-picture indicating information in the read set of mapping information, which coincides with the display mode information stored in the display setting register; and

to control decoding of a set of image data included in the determined set of sub-picture data, and to arrange the decoded set of image data onto the processed frame.

8. A reproduction method for an optical disc as claimed in claim 7, wherein the set of management information further includes a set of program chain information which indicates a reproduction order of the video objects, and the set of mapping information corresponds to video objects indicated by a set of the sub-picture indicating information, wherein the controlling step is arranged to control the reading of a set of the program chain information and to read the set of mapping information corresponding to the read set of program chain information from the optical disc.

9. A reproduction method for an optical disc as claimed in claim 8, wherein the plurality of display methods includes a pan scan method and a letter box method,

wherein the pan scan method enables display of each frame of video data with an aspect ratio of 16:

9 on a display screen with an aspect ratio of 4;

3 after trimming to give 4;

3 aspect ratio image of moving picture, and

wherein the letter box method enables display of each frame of video data with an aspect ratio of 16;

9 on a display screen with an aspect ratio of 4;

3 after resizing to give 4;

3 aspect ratio image of the moving picture.

10. A reproduction apparatus for an optical disc including a plurality of video objects having at least one set of video data and a plurality of sets of sub-picture data, the sub-picture data includes a set of image data and a set of coordinate information indicating a display position of the set of image data and management information for controlling reproduction of data on the optical disc including a set of mapping information indicating pairs of a set of display mode information, the set of display mode information indicates one of a plurality of display methods for a frame of video data to be displayed at one of a plurality of aspect ratios, a set of sub-picture indicating information for indicating a set of sub-picture data, out of a plurality of sets of sub-picture data in the same video object, which includes a set of coordinate information which coincides with one of the display methods, and a set of mapping information corresponding to a video object, comprising:

a reading means capable of reading the video object and a set of said mapping information from the optical disc;

a display setting register for storing display mode information indicating one of the display methods;

a video decoder for decoding a set of video data included in said video object and for processing a frame of the decoded set of video data at one of the display methods;

a sub-picture decoder for decoding one set of image data out of a plurality of sets of sub-picture data included in said video object, and for arranging the decoded set of image data onto the processed frame; and

a controller for controlling the reading means, the video decoder and the sub-picture decoder characterized in that the controller is arranged;

to control the reading means to read said video object and a set of said mapping information from the optical disc;

to control the video decoder to decode a set of video data included in the read video object, and to process a frame of the decoded set of video data in accordance with the display mode information stored in the display setting register;

to determine one sub-picture data out of a plurality of sets of sub-picture data included in the read video object, in accordance with the set of sub-picture indicating information in the read set of mapping information, which coincides with the display mode information stored in the display setting register; and

to control the sub-picture decoder to decode a set of image data included in the determined set of sub-picture data, and to arrange the decoded set of image data onto the processed frame.

11. A reproduction method for an optical disc including a plurality of video objects having at least one set of video data and a plurality of sets of sub-picture data, the sub-picture data includes a set of image data and a set of coordinate information indicating a display position of the set of image data and management information for controlling reproduction of data on the optical disc including a set of mapping information indicating pairs of a set of display mode information, the set of display mode information indicates one of a plurality of display methods for a frame of video data to be displayed at one of a plurality of aspect ratios, a set of sub-picture indicating information for indicating a set of sub-picture data, out of a plurality of sets of sub-picture data in the same video object, which includes a set of coordinate information which coincides with one of the display methods, and a set of mapping information corresponding to a video object, comprising the steps of:

reading the video object, and a set of said mapping information from the optical disc;

storing display mode information indicating one of the display methods;

decoding a set of video data included in said video object and processing a frame of the decoded set of video data at one of the display methods;

decoding one set of image data out of a plurality of sets of sub-picture data included in said video object, and arranging the decoded set of image data onto the processed frame; and

controlling the reading and decoding of video data and sub-picture data characterized in that the controlling step is arranged;

to control reading of said mapping information from the optical disc;

to control decoding of a set of video data included in the read video object, and to process a frame of the decoded set of video data in accordance with the display mode information stored in the display setting register;

to determine one sub-picture data out of a plurality of sets of sub-picture data included in the read video object, in accordance with the set of sub-picture indicating information in the read set of mapping information, which coincides with the display mode information stored in the display setting register; and

to control decoding of a set of image data included in the determined set of sub-picture data, and to arrange the decoded set of image data onto the processed frame.