PURPOSE: To improve hard efficiency and processing efficiency by providing a means encoding a transformation coefficient has a null processing period and for which an orthogonal transformation in performed and a means encoding the motion vector of the image data which a block division is performed for the null processing period.
CONSTITUTION: The motion vector between image data within a predictive frame stored in a frame memory 110 at every unit of plural motion detections to be encoding objects is detected, a motion compensation is performed by the data within the frame memory 110 based on it, and the predictive signal corresponding to block data is generated by a motion compensation part 111. By a difference arithmetic part 112, the difference between predictive signal data and an input data block is taken, an orthogonal transformation is performed for it and it is quantized. Further, the rearranging of the transformation coefficient is performed and a variable length encoding is performed for it. An encoding processing is performed for the motion vector stored temporarily in a temporary storage memory 114 by a variable length encoding part 107 during the encoding processing of the transformation coefficient.
SHIGESATO TATSURO
MATSUDA TOYOHIKO
AWAMOTO SHIGERU
