PICTURE CODING DEVICE, PICTURE CODING METHOD, PICTURE CODING PROGRAM, TRANSMISSION DEVICE, TRANSMISSION METHOD, AND TRANSMISSION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a picture coding technique that can perform parallel processing and thus implementing a context index calculating method having a small computation amount and that is simple in circuit configuration and suitable for real-time processing.SOLUTION: In a picture coding device, a significant coefficient information coding controller 706 and an arithmetic encoder 701 code significant difference coefficient information indicating that a difference coefficient value is not zero and is significant for each of difference coefficients in a partial region of a coding target. A difference coefficient value coding controller 707 and the arithmetic encoder 701 code difference coefficient values when significant difference coefficient information is significant for each of pixels in the partial region of the coding target. The significant coefficient information coding controller 706 decides a context for coding the significant difference coefficient information in the partial region of the coding target on the basis of information indicating the significance of the difference coefficient in the coded partial region.SELECTED DRAWING: Figure 15