Apparatus and a method for variable speed searching of recorded

Details Apparatus and a method for variable speed searching of recorded Apparatus and a method for variable speed searching of recorded

1994-11-22

1997-03-25

Tran, Thai Q.

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

H04N 5783

Patent

active

056150180

ABSTRACT:
An apparatus and a method for variable speed searching of recorded pictures on a storage medium is disclosed. The apparatus comprises a recording-playback device which records pictures and an information value signal, and plays back the recorded pictures. A speed controller responsive to the information value signal adjusts the speed of the recording-playback device during a fast-scan search (i.e., fast-forward or fast-backward search). The fast-scan search speed is adjusted so that the recorded pictures with high information values are played back at a slower fast-scan speed and the recorded pictures with low information values are played back at a faster fast-scan speed. The information value signal is generated during recording or during playback. The information value signal has a low value when a correlation between temporally successive recorded pictures is high, and a high value when the correlation is low, the correlation depends upon temporal redundancy between the successive video pictures. In short, an apparatus and a method for variable speed searching of recorded pictures is provided in which the fast-scan speed is automatically adjusted to allow for viewing of static and dynamic scenes at a proper speed during a fast-scan search.

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Draft Revision Of Recommendation H.261: Video Codec For Audiovisual Services At p .times. 64 kbits/s, pp. 221-239, 1990 Elseview Science Publishers B.V.

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