Decoding apparatus, decoding method, encoding apparatus, encoding method, image processing system and image processing method

摘要

An image processing system comprising a decoder 10 and an encoder 30. The decoder 10 comprises a section 12 for decoding a bit stream to generate image data, generating coding parameters for each layer and generating an error flag indicating whether the coding parameters can be effectively used. The encoder 30 comprises a control section 41, an MB-parameter calculating section 36, an encoding section 38 and a variable-length encoding section 39. The section 41 determines, from the error flag, whether or not the coding parameters can be effectively used or not. The section 36 calculates coding parameters when the coding parameters generated by the section 12 are invalid. The sections 38 and 39 encodes the image data by using the coding parameters generated by the section 12 when these parameters are valid, and by using the coding parameters calculated by the section 36 when the coding parameters generated by the section 12 are invalid. <IMAGE>