Interpolative, predictive image data compression system - provides movement compensation for each image block using estimation block obtained by various different prediction methods

摘要

The data compression system uses predictive image coding with movement compensation. The image is divided into blocks contg. a defined number of image points, with a movement compensating estimation block provided for each image block using the preceding images. A decision relating to the prediction method is made as to whether the shifted or un-shifted blocks of the preceding image, or the image preceding the immediately preceding image are used, as to whether no prediction is made, or as to whether the weighted mean of both preceding images are used as the estimation block. ADVANTAGE - Good image quality and smooth movement for reduced data rate.