MOVING IMAGE CODING METHOD, DECODING METHOD, CODER AND DECODER

摘要

PROBLEM TO BE SOLVED: To reduce coding information by improving an inter-frame prediction efficiency in the case of coding a moving image through the use of inter-frame prediction. SOLUTION: A frame number coding image memory 5 stores a reference frame number in time series and a reference image corresponding to the reference frame number. A reference image designation section 3 gives a reference frame number 6 to a frame number coding image memory 5 to obtain a reference image 7 of the reference frame number 6 and generates a prediction image 4 and outputs the reference frame number data 9 obtained by coding the reference frame number 6. A prediction processing section 2 compares an input image 1 with the prediction image 4 to provide an output of a prediction error image 8. The prediction error image 8 is coded by a prediction error coding section 10 into coded data 11. A multiplex processing section 12 multiplexes the coded data 11 and the reference frame number data 9 and provides an output of the result to a decoder as multiplexed coded data 13.