Decoding device and decoding method with inverse playback

摘要

The present invention realizes a smooth reproduced picture at the inverse playback, without losing of the naturality of display. Picture output candidate frames are decided such that intervals between frame are uniform on a time axis at a normal playback. When the candidate frame exists in a GOP preceding a GOP which is presently displayed and the number of frames in the GOP is unknown, a frame among one of a last or last but one I or P coded frame in the GOP, which is nearer to a true picture output frame is decided as a picture output candidate frame.