Layer based scalable multimedia datastream compression
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United States of America Patent
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Issued Date -
Nov 27, 2008
app pub date -
May 22, 2007
filing date -
May 22, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Source signals, such as audio and/or video data, are encoded into multiple, consecutive frequency bands. These bands are referred to as coding layers. Rather than performing complex bit-slice operations, a disclosed technique enables an agile and simplified response to transmission channel throughput variations. Specifically, if it becomes necessary to restrict the rate of data transmission to avoid receiver buffer underflow resulting from transmission channel degradation, layers from the transmitted signal are omitted, beginning with the highest frequency bands. Efficient and agile bit rate scalability during data streaming through wired or wireless networks and during local playback is thus enabled.
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