Encoded picture data is input to an MPEG decoding circuit. Decoded picture data is generated according to motion information. The decoded picture data is output to a motion adaptive picture processor. The MPEG decoding circuit supplies the motion information to a time axis compensation circuit. The time axis compensation circuit supplies the motion information to the motion adaptive picture processor at a timing in which decoded picture data that contains the motion information is supplied from the MPEG decoding circuit to the motion adaptive picture processor. The motion adaptive picture processor determines whether picture data that is being processed is a moving picture or a still picture according to the motion information, selects a corresponding picture process, and executes the selected picture process.