DECODING CIRCUIT, DECODING METHOD, ENCODING CIRCUIT, AND ENCODING METHOD

摘要

A versatile decoding circuit can decode an image corresponding to various kinds of image encoding systems by using a single circuit. A pattern storage part (10) stores scan pattern data corresponding to a scan pattern. A control part (19) writes the scan pattern data based on supplied encoded data into the pattern storage part (10). A pattern reading control part (11) reads the scan pattern data stored in the pattern storage part (10). A variable-length decoding part (21) restores coefficient data from the supplied encoded data. A reverse scan processing part (39) rearranges the restored coefficient data according to the scan pattern data read from the pattern storage part (10).