Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1993-09-20
1998-11-10
Cheavalier, Robert
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
386131, H04N 5917, H04N 591
Patent
active
058356720
ABSTRACT:
A method for coding an input video signal to provide a coded signal. The input video signal has a field rate of 60 Hz and is derived from a motion picture film source using 2-3 pulldown. In the method, first frames, consisting of fields derived from different frames of the motion picture film source, are detected in the input video signal. Then, the input video signal is predictively coded to provide the coded signal by using second frames as reference pictures. Second frames are frames of the input video signal other than the first frames detected in the detecting step. In an alternative method for coding an input video signal to provide a coded signal, duplicate pictures are detected in the input video signal, and duplicate pictures are eliminated from the input video signal to provide an encoder input signal. The encoder input signal is predictively coded using plural predictive coding methods to provide the coded signal. Finally, a skip-picture flag is included in the coded signal in lieu of each eliminated duplicate picture, and a reference picture code identifying a field to be copied to provide each eliminated duplicate picture is also included in the coded signal.
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Suzuki Teruhiko
Yagasaki Yoichi
Cheavalier Robert
Sony Corporation
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