VIDEO CODING DEVICE, VIDEO CODING METHOD, AND VIDEO CODING PROGRAM

摘要

A video coding device includes: an orthogonal transform unit 11 which orthogonally transforms an image block to calculate an orthogonal transform coefficient; a quantization unit 12 which quantizes the orthogonal transform coefficient to calculate a coefficient level; and an entropy coding unit 13 which entropy-encodes location information on all significant coefficient levels among the coefficient levels, and then entropy-encodes value information on each of the significant coefficient levels to output a bitstream, wherein the quantization unit 11 includes a number of location information bits calculating unit which calculates the number of bits of location information determined based on the location of a coefficient level to be significant first in order of transmission and included in the image block; a number of value information bits calculating unit which calculates the number of value information bits of a coefficient level to be significant, and a high-cost coefficient level detection/removal unit which sets a coefficient level to be significant in which the number of location information bits and the number of value information bits meet a predetermined condition to 0.