Bandwidth scaling of a compressed video stream
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United States of America Patent
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Aug 20, 2002
Grant Date -
Jan 24, 2002
app pub date -
Jun 23, 2001
filing date -
Jun 27, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
An original previously compressed video stream image having a first level of compression including a first level of quantization is decompressed, and a set of original motion vectors for each P source picture and for each B source picture is recovered and saved. The decompressed video stream image is re-compressed re-using the most relevant saved original motion vectors in order to create a re-compressed video stream image having a second level of compression including a second level of quantization. The most relevant motion vectors point out to the camera movement and to the moving objects within the original reference frame.
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