Patent ID: 9661330
Date: 2017-05-23
CPC Classifications: G06T,H04N

Claim:
1. An image coding method of coding an image that includes coding units, each of the coding units including a plurality of transform units, the image coding method comprising: performing transformation on luminance data and chrominance data of each of the plurality of transform units; arranging, for each of the plurality of transform units, transformed luminance data and transformed chrominance data into a set; and coding, into a bitstream on a per coding unit basis, the sets arranged for the plurality of transform units, the sets being coded into the bitstream in order, wherein the coding units include a coding unit having a first transform unit and a second transform unit, wherein, in the coding of the coding unit having the first transform unit and the second transform unit, the set of the transformed luminance data and the transformed chrominance data arranged for the first transform unit is coded into the bitstream before the set of the transformed luminance data and the transformed chrominance data arranged for the second transform unit is coded into the bitstream, wherein the coding units are included in a slice of the image, wherein each of the coding units corresponds to a square region included in the slice, wherein the performing transformation on the luminance data and the chrominance data of each of the plurality of transform units includes: wherein, for one of the transform units included in the coding unit, the transformed luminance data is arranged with the transformed combined chrominance data into the set, when the transform unit is smaller than the predetermined size.