VIDEO SIGNAL DECODING METHOD AND VIDEO SIGNAL DECODER

摘要

PROBLEM TO BE SOLVED: To provide a reproduced image in a reverse direction smoothly with a small memory capacity while avoiding increase 10 the circuit scale by conducting decoding processing of an object frame as required on each occasion. SOLUTION: In the case of decoding reproduction of I and P pictures, from a head of a GOP till an object frame, only the I and P pictures are decoded and a reproduced image of an object frame is obtained and simultaneously two newest reproduced images of the I and P pictures are stored in frame memories 91-93. The two reproduced images in the frame memories 91-93 is used for reference images and in the case of decoding reproduction of a B picture, a retrieval table 5 in which an address of each B picture and information in a bit stream storage memory 3 are stored is refered to read a bit stream of an object B picture as required from the bit stream storage memory 3 and decoding processing is conducted for each occasion and the result is outputted as a reproduced image 81.