Verfahren zum Bild-zu-Bild-Prädiktion und Bildsignal-Kodier/Dekodiervorrichtung

摘要

In an interframe move predicting method for prediction of the move in a bidirectionally predictive-coded frame (B0) from an intra-coded frame (I0) and a predictive-coded frame (P0), the improvement predicts the move in another bidirectionally predictive-coded frame (B1) from the preceding bidirectionally predictive-coded frame (B0) and the predictive-coded frame (P0). Also disposed is a picture signal coding apparatus capable of executing orthogonal transformation of a picture signal, then quantizing the transformed data, and coding the data thus quantized. The apparatus comprises a local decoder (8, 9, 10) for the quantized data; first and second memories (11, 12) for storing the decoded picture data of an intra-coded or bidirectionally predictive-coded frame, and that of a predictive-coded frame respectively; a predictive picture generator (14) for generating a predictive picture of the other bidirectionally predictive-coded frame; and a difference calculator (2) for calculating the difference between the predictive picture and the original picture signal corresponding thereto. Further disclosed is a picture signal decoding apparatus which comprises an inverse multiplexer (16) for separating the coded data into interframe predictive error data and vector coded data; a decoder (18, 19, 20) for generating decoded picture data on the basis of such error data; first and second memories (21, 22) for storing the decoded picture data of the intra-coded frame and the predictive-coded frame respectively; a predictive picture generator (23) for generating a predicted picture of the other bidirectionally predictive-coded frame; and a frame switching selector (24) for selectively rearranging the decoded picture data in the order of reproduction. <IMAGE>