Method and system for locating a frame position in an MPEG data stream
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United States of America Patent
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Feb 3, 1998
Grant Date -
N/A
app pub date -
Jan 23, 1996
filing date -
Jan 23, 1996
priority date (Note) -
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Abstract
A method for locating a frame position in an MPEG data stream within a computer system is disclosed. MPEG standard is a set of defined algorithms and techniques for the compression and decompression of moving pictures (video) and sound (audio), and the formation of a multiplexed data stream that includes the compressed video and audio data plus any associated ancillary service data. Although the MPEG standard is extremely flexible, there is a fundamental deficiency associated with the packet-oriented nature of the MPEG format, and that is there being no information about the position of each video frame encoded in the data stream. Even though such information can be deduced from the byte-rate, but because the calculation of a frame position depends on a constant byte-rate, a problem may still arise when the byte-rate is non-existent, incorrectly encoded, or constantly changed due to the presence of several packs with varying rates. This invention presents an improved method for locating a frame position in the MPEG data streams regardless of the byte-rate condition.
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