Picture coding apparatus and decoding apparatus

Abstract

Representative picture extracting means extracts representative pictures from a coded input signal which consists of representative pictures, motion parameters for motion compensation which refers the representative picture, and reference relationships, and outputs a coded representative picture signal. The signal is decoded by a representative picture decoding means, and output as a decoded representative picture signal to a delay memory. On the other hand, representative picture reference relationship extracting means extracts reference relationship additional information, and outputs it to decoded signal output controlling means. The sequence of outputting the representative pictures is determined on the basis of the reference relationship additional information, and an output control signal is output to the delay memory. The delay memory outputs the decoded representative picture signal as a decoded output signal, on the basis of the output control signal.

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