Patent ID: 7978920

Claim:
An image processing system including a decoder configured to decode an encoded image and an encoder configured to encode the image decoded by the decoder, the decoder including decoding means for decoding the encoded image, and detection means for detecting, on the basis of the image, a fade period included in the image and supplying a fade information signal indicating a detection result to the encoder, the encoder including acquisition means for acquiring the fade information signal, changing means for changing a process performed in the encoding of the image in accordance with the fade information signal, and generation means for generating a forward-predicted image by performing motion compensation in a forward prediction mode and generating a backward-predicted image by performing motion compensation in a backward prediction mode, wherein the changing means changes the process performed in the motion compensation such that if the current image to be encoded is in a fade period, the changing means changes the process performed on the image in the motion compensation, wherein the changing means changes the process performed in the motion compensation such that when a B-picture in a fade period is given as the current image, if the difference between a prediction residual given by the difference between the forward-predicted image and the current image and a prediction residual given by the difference between the backward-predicted image and the current image is less than a predetermined threshold value, the changing means changes the motion compensation mode of the motion compensation into a bidirectional prediction mode.