IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD, IMAGE DECODING METHOD AND IMAGE PREDICTION DEVICE Russian patent published in 2015 - IPC H04N19/593 H04N19/157 

FIELD: physics.

SUBSTANCE: when an intra-prediction parameter indicates a horizontal prediction process, an intra-prediction unit adds a value proportional to a change in a horizontal direction of the luminance values of pixels adjacent to the top of each block, which is a unit for the prediction process of a coding block, to the luminance value of a pixel adjacent to the left of the block to set a result of the addition as a predicted value of a prediction image. When the intra-prediction parameter indicates a vertical prediction process, the intra-prediction unit adds a value proportional to a change in a vertical direction of the luminance values of pixels adjacent to the left of the block to the luminance value of the pixel adjacent to the top of the block to set the result of the addition as a predicted value of the prediction image.

EFFECT: providing high-precision prediction, even when a signal value varies along the prediction direction, thereby improving image quality.

10 cl, 17 dwg