Combined MPEG-4 FGS and modulation algorithm for wireless video transmission
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United States of America Patent
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Jun 21, 2005
Issued Date -
N/A
app pub date -
Dec 5, 2001
filing date -
Dec 5, 2001
priority date (Note) -
Expired
status (Latency Note)
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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.
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