Motion picture encoding and/or decoding system

Details Motion picture encoding and/or decoding system Motion picture encoding and/or decoding system

1993-01-15

1995-04-25

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

348401, 348421, H04N 750

Patent

active

054103509

ABSTRACT:
A motion picture coding and decoding system is provided, which permits high picture quality to be obtained with less information amount than that in case of a system having the sole function of DCT coding, permits reduction of block distortion of reproduced picture and permits coding efficiency increase. One picture frame is divided into a plurality of blocks for block-by-block coding. At this time, discrete cosine transform (DCT) coding and intra-block non-transform coding (NTC) are adaptively switched one over to the other according to the character of pattern. In case of the intra-block non-transform coding, predictive values of block and quantizing width are transmitted. Each block is adaptively selected with sub block of frame construction or sub block of field construction.

REFERENCES:
patent: 5260783 (1993-11-01), Dixit

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