DEVICE AND METHOD FOR ENCODING AND PROVISION MEDIUM

摘要

PROBLEM TO BE SOLVED: To suppress deterioration in picture quality when encoding is performed by detecting moving vectors between frames of image data. SOLUTION: A simple motion detecting circuit 3 detects the motion quantities (simple moving vector) between image data (current field image) inputted from outside an encoder 1 and image data (retrieved field image) inputted from a frame memory 2 and outputs them to a decision circuit 4. The decision circuit 4 determines the reduction rate of the image according to horizontal and vertical motion quantities inputted from the simple motion detecting circuit 3 and outputs information on it (image size parameter) to an image size converting circuit 5. The image size converting circuit 5 reduces the image of the image data inputted from the frame memory 2 according to the reduction parameters inputted from the decision circuit 4 and outputs the image to an encoding circuit 6. The encoding circuit 6 encodes the image data inputted from the image size converting circuit 5.