Combined MPEG-4 FGS and modulation algorithm for wireless video transmission
First Claim
1. A method of modulating a compressed video stream for variable-bandwidth transmission, wherein the compressed video stream uses Fine Granularity Scalable (FGS), the method comprising:
- compressing a video stream received from a video stream source using a video compression with FGS to generate a compressed output video stream having a base layer and at least one enhancement layer, wherein the video compression is performed in response to a feedback control input signal received from a display, the feedback control signal for use in controlling a modulation and optimization of the compressed output video stream; and
transmitting the compressed output video stream to the display.
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Accused Products
Abstract
The invention relates to a method and system for modulating an MPEG-4 FGS compressed video stream for variable-bandwidth transmission. A source of a video stream is provided, and a display having means for generating a control input signal for controlling one or more of video compression, error correction code generation, or symbol constellation mapping. The source video stream is compressed using MPEG-4 FGS compression to generate a compressed output video stream. The video compression is optionally performed based upon the control input signal from the display. Error correction code for the compressed video stream may be added, and its generation and addition may be optionally controlled based upon the control input signal from the display. The resulting video symbols may then be mapped to constellations, with this mapping also optionally controlled based upon the control input signal. The resulting compressed output video stream is then transmitted to the display.
417 Citations
19 Claims
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1. A method of modulating a compressed video stream for variable-bandwidth transmission, wherein the compressed video stream uses Fine Granularity Scalable (FGS), the method comprising:
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compressing a video stream received from a video stream source using a video compression with FGS to generate a compressed output video stream having a base layer and at least one enhancement layer, wherein the video compression is performed in response to a feedback control input signal received from a display, the feedback control signal for use in controlling a modulation and optimization of the compressed output video stream; and
transmitting the compressed output video stream to the display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of modulating a compressed video stream for variable-bandwidth transmission, wherein the compressed video stream uses FGS, the method comprising:
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compressing a video stream received from a video stream source using a compression with FGS to generate a compressed output video stream;
generating error correction code for the compressed video stream, wherein the error correction code generation is controlled in response to a feedback control input signal received from a display the feedback control input signal for controlling error correction code generation;
adding the error correction code generated to the compressed output video stream to generate a compressed output video stream with error correction code; and
transmitting the compressed output video stream with error correction code to the display. - View Dependent Claims (10)
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11. A method of modulating a compressed video stream for variable-bandwidth transmission, wherein the compressed video stream uses FGS, the method comprising:
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compressing a video stream received from a video stream source using a compression with FGS to generate a compressed output video stream;
mapping video symbols to constellations, wherein the mapping is controlled in response to a feedback control input signal received from a display, the feedback control input signal for controlling mapping of the video symbols to constellations; and
transmitting the compressed output video stream to the display. - View Dependent Claims (12)
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13. A system for modulating a compressed video stream for variable-bandwidth transmission, wherein the compressed video stream uses Fine Granularity Scalable (FGS), the system comprising:
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a video stream compression engine with FGS for generating a compressed output video stream received from a source of a video stream, wherein the video compression is performed in response to a feedback control input signal received from a display, the feedback control input signal for use in controlling a modulation and optimization of the compressed output video stream; and
a transmitter for transmitting the compressed output video stream to the display. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method of modulating an MPEG-4 FGS compressed video stream for variable-bandwidth transmission, the method comprising:
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compressing a video stream received from a video stream source using a video compression with FGS to generate a compressed output video stream, wherein the video compression is optionally performed in response to a feedback control input signal received from a display;
generating and adding error correction code for the compressed video stream, wherein error correction code generation and addition is optionally controlled in response to the feedback control input signal received from the display;
mapping video symbols to constellations, wherein mapping is optionally controlled in response to the feedback control input signal received from the display the feedback control input signal for use in controlling one or more of video compression, error correction code generation, or symbol constellation mapping; and
transmitting the compressed output video stream to the display.
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Specification