Abstract
Very high resolution video system such as 4K/8K enables super close view, and, such very short distance causes significant different view in a picture. On the other hand, the human gaze mostly distribute to the center of the picture, and this is more significant in the large screen. Therefore, uniform coding for a picture may not be always best. In this report, the reduction of the number of pixels to be coded using the geometric image conversion is discussed on the viewpoint of processing power and coding efficiency. The basic method with two dimensional conversion based on the actual view and the horizontal vertical independent methods are compared. Furthermore, the quantization control using the contrast conversion to reduce the residual information in the independent method is discussed. As the results of experiments, the possibility of maximum 35 percent bit rate reduction is recognized with 50% processing power.
