Patent ID: 9549195
Date: 2017-01-17
CPC Classifications: H04N

Claim:
1. A decoding method for decoding a signal of an intra-coded image, the decoding method comprising: determining whether a partial area of the image has been converted in an up-down symmetry conversion mode to flip the partial area of the image vertically or in a right-left symmetry conversion mode to flip the partial area of the image horizontally with reference to information sent together with the signal of the image; and creating a decoded image by executing conversion associated with a conversion mode determined in the determination step after intra-coded predicting, wherein the information includes information indicating a direction of the flip of the partial area of the image and information indicating a position of the flipped partial area, and wherein the information indicating the direction of the flip includes either one of vertical flipping or horizontal flipping, wherein a scanning direction for a flipped partial area can be the same direction as a non-flipped partial area, wherein the scanning direction applied to both a flipped partial area and a non-flipped partial area is raster scanning.