Moving picture signal decoder

Details Moving picture signal decoder Moving picture signal decoder

1996-06-06

1998-05-12

Chin, Tommy P.

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

386 81, 386111, H04N 5783, H04N 576

Patent

active

057518882

ABSTRACT:
A moving picture signal decoder for decoding compressed picture data resulting from compressing original picture data by use of a combination of picture information including picture data of each frame of a moving picture signal and motion vector information including a motion vector between frames, the moving picture signal decoder comprising demultiplexer device for demultiplexing the compressed picture data to obtain the picture data and the motion vector; decoding device for decoding the picture data to obtain decoded picture data; down-sampling device for (i) down-sampling the decoded picture data so that the decoded picture data has 1/M a number of pixels included in the original picture data, where M is a positive integer, in one of a reverse playback mode and a fast forward/reverse playback mode and (ii) passing the decoded picture data as it is in a normal playback mode; scaling device for (i) multiplying the motion vector by 1/m in one of the reverse playback mode and the fast forward/reverse playback mode and (ii) passing the motion vector as it is in the normal playback mode; memory device for storing the decoded picture data output from the down-sampling device; and memory reading device for reading the sampled picture data from the memory device in a predetermined order by using the motion vector output from the scaling device.

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patent: 5305113 (1994-04-01), Iwamura et al.
patent: 5339167 (1994-08-01), Kuroda
patent: 5436665 (1995-07-01), Ueno et al.
patent: 5477397 (1995-12-01), Naimpally et al.
patent: 5528301 (1996-06-01), Hau et al.
patent: 5598222 (1997-01-01), Lane
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"Digital Image Processing" by William K. Pratt, 2nd Ed., .sctn.4.3.2 Interpolation Functions, (1991).

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