DYNAMIC IMAGE DECODING DEVICE AND DYNAMIC IMAGE ENCODING DEVICE

摘要

A dynamic image decoding device (400a) includes a correction image deciding unit (15) and an inverse filter processing unit (12). For at least one block, the correction image deciding unit (15) performs correction as follows. A pixel value of each of pixels of restoration quantization object image restored by inverse quantization is added by an approximating average pixel value for approximating an average pixel value of a quantization object image in a block to which the pixel belongs. The inverse filter processing unit (12) performs an inverse filter processing equivalent to an inverse conversion of a filter process for removing a frequency component for generating a block distortion. Thus, the dynamic image decoding device (400a) can reduce the block distortion in a decoded dynamic image without causing adverse effect such as blur or flickering of an image. The dynamic image decoding device (400a) can accurately restore a frequency component generating a block distortion removed.