Adaptive prediction encoding device which can effectively refres

Details Adaptive prediction encoding device which can effectively refres Adaptive prediction encoding device which can effectively refres

1993-09-17

1994-09-06

Kostak, Victor R.

Television

Bandwidth reduction system

Data rate reduction

348 11, H04N 713

Patent

active

053452690

ABSTRACT:
In an adaptive prediction encoding device which carries out adaptive encoding of a digital picture signal by making a selector adaptively select a two-previous predictor, a previous field predictor, and a higher order intraline predictor in accordance with the digital picture signal, a first selection forcing circuit forces a selector to select the higher order intraline predictor at first timing of fixed scanning lines which periodically appear at a period of (2N+1) scanning lines in each field of successive frames of the digital picture signal, where N represents a natural number. A second selection forcing circuit forces the selector to select the higher order intraline predictor at second timing of additional scanning lines which precede the fixed scanning lines by (m-1) scanning lines in each field of an m-th frame of the digital picture signal, where m consecutively varies from 2 to (2N+1) which is equal to M.

REFERENCES:
patent: 4437119 (1984-03-01), Matsumoto et al.
patent: 4633325 (1986-12-01), Usubuchi
patent: 5164828 (1992-11-01), Tahava et al.

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