IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD, AND IMAGE DECODING METHOD

摘要

A deblocking filtering unit (30) generates a first processed decoded image signal (31) from a decoded signal (13), and a sharpening filtering unit (32) generates a second processed decoded image signal (33) from the first processed decoded image signal (31). A Wiener filter designing unit (34) designs first and second Wiener filter coefficients (35, 36) on the basis of the first and second processed decoded image signals (31, 33), respectively. A Wiener filtering unit (37) sets one of the first processed decoded image signal (31) on which Wiener filtering of the first Wiener filter coefficient (35) is performed, the second processed decoded image signal (33) on which Wiener filtering of the first and second Wiener filter coefficients (35, 36) is performed, and the first processed decoded image signal (31) on which no filtering is performed as a reference image signal (15).