Digital baseband interface for a DVD player
AssigneeThomson Licensing
InventorThomas Anthony Stahl
Life of this patent
Estimating the term…
Abstract
Managing interoperability of digital devices such as a digital video disc player and a digital television interconnected via a digital bus is provided. This interoperability is based on the IEEE 1394 serial bus for the physical and link layers and makes use of AV/C or CAL as the control language. This invention provides for transferring a DVD subpicture that has been transformed into a bit-mapped on-screen display (OSD) format via an asynchronous channel of the interconnecting serial bus.
Claims11
A method for operating a digital video processing apparatus interconnected by a digital bus to a digital video disc player, the digital video processing apparatus performing the steps of:
- (a) receiving from said digital video disc player, via said digital bus, a program content stream representative of a video program stored on a disk coupled to said digital video disc player, said program content stream including data in a compressed format, said program content stream being received via a first type of transfer mechanism;
- (b) decoding said program content stream in said digital video processing apparatus;
- (c) receiving from said digital video disc player, via said digital bus, bit-map data representative of a subpicture associated with said program content stream and enabling user navigation through the video program, said bit-map data being suitable for display, said bit-map data being received via a second type of transfer mechanism;
- and
- (d) combining, in said digital video processing apparatus, said bit-map data received from said digital video disc player and said decoded program content stream to produce a signal representative of a combined image suitable for display.
A digital television comprising:
- (a) means for receiving from a digital data processing apparatus having a storage means, via a digital bus interconnecting said digital television and said digital data processing apparatus, a compressed digital data stream representative of a video program stored on said storage means, said compressed digital data stream being received via a first type of transfer mechanism;
- (b) means for decoding said compressed digital data stream in said digital television;
- (c) means for receiving from said digital data processing apparatus, via said digital bus, bit-map data representative of a subpicture associated with said compressed digital data stream and enabling user navigation through the video program, said bit-map data being received via a second type of transfer mechanism;
- and
- (d) means for combining, in said digital television, said bit-map data received and said decoded compressed digital data stream to produce a signal representative of a combined image suitable for display.
A method for operating a digital video disc player interconnected by a digital bus to a digital television, the digital video disc player performing the steps of:
- (a) receiving from a digital video disc coupled to said digital video disc player an MPEG-PS digital stream representative of a video program;
- (b) converting said digital stream from an MPEG-PS format to a digital stream having an MPEG-TS format;
- (c) transmitting said MPEG-TS digital stream to said digital television via an isochronous channel of said digital bus;
- (d) processing a subpicture stream associated with said MPEG-PS digital stream, and enabling user navigation through the video program, to generate a bit-mapped digital data suitable for display;
- and
- (e) transmitting said bit-mapped digital data to said digital television via an asynchronous channel of said digital bus.
A method for operating a digital video disc player interconnected by a digital bus to a digital video processing apparatus, the digital video disc player performing the steps of:
- (a) retrieving from a storage device coupled to said digital video disc player a program content stream representative of a video program stored on said storage device, said program content stream including data in a compressed format;
- (b) formatting the program content stream for transfer via a first type of transfer mechanism of said digital bus and transferring the formatted program content stream to the digital video processing apparatus via said first type of transfer mechanism of said digital bus;
- (c) retrieving from said storage device subpicture information associated with said program content stream and enabling user navigation through the video program, said subpicture information comprising data in a compressed format;
- (d) processing the subpicture information to generate bit map data representing the subpicture information;
- and
- (e) transferring the bit map data to the digital video processing apparatus via a second type of transfer mechanism of said digital bus.
Dependencies are inferred from the claim text.