Error recovery of corrupted MPEG-4 bitstreams using fuzzy decoding of start codes and resync markers
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United States of America Patent
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Apr 27, 2004
Grant Date -
Sep 5, 2002
app pub date -
Mar 2, 2001
filing date -
Mar 2, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A decoder for motion-picture-experts group (MPEG-4) video detects start codes at the beginning of video object planes (VOP) and resync markers at the start of each video packet (VP) in the VOP. When an error occurs in the bitstream, a parser searched for a next start code or resync marker to find the start of the next video packet. A partial match of the unique start-code bit sequence signals a fuzzy match, allowing the VOP header and data to be decoded even when bit errors occur in the VOP start code. A fuzzy match of the shorter resync marker can also be enabled. Fuzzy matching of VOP start codes and resync markers allows for faster recovery from corrupted bitstreams such as those transmitted over wireless networks.
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