IMAGE-SIGNAL DECODING APPARATUS

An image-signal decoding apparatus decodes moving-picture data compressed by orthogonal transform, quantization, and variable-length coding for each block. A variable-length code decoding circuit decodes the compressed moving-picture data and outputs the decoded moving-picture data, a moving vector for each block, and block-type information. A distortion eliminator circuit eliminates block distortions from the moving-picture data decoded by the variable-length code decoding circuit. A judging circuit obtains a signal band for each block from the decoded moving-picture data and, based on the band and at least one of the moving vector for each block and the block-type information, changes the distortion elimination characteristics of the distortion eliminator circuit.