IMAGE ENCODING DEVICE, IMAGE ENCODING METHOD, IMAGE ENCODING PROGRAM, TRANSMISSION DEVICE, TRANSMISSION METHOD, TRANSMISSION PROGRAM, IMAGE DECODING DEVICE, IMAGE DECODING METHOD, IMAGE DECODING PROGRAM, RECEIVING DEVICE, RECEIVING METHOD, AND RECEIVING PROGRAM

摘要

Provided is an image encoding device that divides a differential coefficient, said differential coefficient being the conversion coefficient of a differential signal for an image to be encoded and a predicted image, into a plurality of partial regions and encodes the differential coefficient in partial region units. For each differential coefficient within a partial region to be encoded, a significant coefficient information encoding control unit (706) and an arithmetic encoding unit (701) encode significant differential coefficient information indicating that said differential coefficient has a differential coefficient value that is not 0, and that said differential coefficient value is significant. A differential coefficient value encoding control unit (707) and the arithmetic encoding unit (701) encode the differential coefficient values for each pixel within a partial region to be encoded when the significant differential coefficient information is significant. The significant coefficient information encoding control unit (706) determines a context for encoding the significant differential coefficient information within a partial region to be encoded on the basis of information indicating the significance of the differential coefficients within the partial regions that have been encoded.