Adaptive prediction encoding device which can effectively refresh an encoded signal with an encoding efficiency kept high

Abstract From the Canadian patent

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 + l) 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 …