Motion picture decoding system which affords smooth reproduction of recorded motion picture coded data in forward and reverse directions at high speed
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United States of America Patent
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Apr 19, 1994
Grant Date -
N/A
app pub date -
Nov 24, 1992
filing date -
Nov 30, 1991
priority date (Note) -
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status (Latency Note)
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Abstract
In a motion picture decoding system, forward and reverse reproduction is carried out smoothly at a high speed without increasing an operation speed for decoding. When high speed reproduction from a record medium containing motion picture coded data is selected, a rate of data input is controlled so that a speed for reading from the record medium to a buffer is increased. Motion picture coded data is fetched from the buffer to a demultiplexer. The fetched data is separated into picture data of frames to be decoded and picture data of frames to be abandoned at a constant frame interval. Only the picture data of the frames to be decoded is sent to a further stage where the picture data is decoded at a speed equal to that for an ordinary reproduction. Thereby, high speed reproduction in forward and reverse directions can be executed without increasing the speed of the decoding operation.
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