Method and apparatus for encoding and decoding video signals by using storage and retrieval of motion vectors
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United States of America Patent
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Feb 11, 2003
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N/A
app pub date -
Jul 13, 1998
filing date -
Jul 13, 1998
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Abstract
A system (10) which encodes and decodes video signals in accordance with a compression standard, such as H.263, efficiently stores and retrieves motion vectors associated with the signals. An encoder (16) and a decoder (22) each use a motion vector storage and retrieval circuit (38, 72) which addresses a respective SRAM array (52, 52'). Advanced Prediction Mode for a video signal is implemented by storing only a minimum number of motion vectors by eliminating storage of motion vectors which are not needed for a real-time current calculation. Storage of selected top motion vectors associated with predetermined macroblocks of video information is avoided to gain a memory savings.
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