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.

主权项

1. A video coding device comprising:
orthogonal transform unit which orthogonally transforms an image block to calculate an orthogonal transform coefficient; quantization unit which quantizes the orthogonal transform coefficient to calculate a coefficient level; and entropy coding unit which entropy-encodes location information on all significant coefficient levels among the coefficient levels, and then entropy-encoding value information on each of the significant coefficient levels to output a bitstream, wherein the quantization means comprises number of location information bits calculating unit which calculates the number of bits of location information determined based on a location of a coefficient level to be significant first in order of transmission and included in the image block, number of value information bits calculating unit which calculates the number of value information bits of a coefficient level to be significant, and 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.