INTRA PREDICTION OF A PROCESSING BLOCK USING A PREDICTED VALUE WHICH IS PROPORTIONAL TO THE AMOUNT OF CHANGE IN THE HORIZONTAL DIRECTION OF THE SIGNAL VALUE OF A PIXEL ADJACENT TOTHE LEFT OF THE PROCESSING BLOCK

摘要

When an intra prediction parameter indicates a horizontalprediction process, an intra prediction unit adds a valueproportional to a change in a horizontal direction of theluminance values of pixels adjacent to the top of each block,which is a unit for prediction process of a coding block, tothe luminance value of a pixel adjacent to the left of the blockto set a result of the addition as a predicted value of aprediction image, whereas when the intra prediction parameterindicates a vertical prediction process, the intra predictionunit adds a value proportional to a change in a verticaldirection of the luminance values of pixels adjacent to the leftof the block to the luminance value of the pixel adjacent tothe top of the block to set the result of the addition as apredicted value of the prediction image .