Patent ID: 9693053
Date: 2017-06-27
CPC Classifications: H04N

Claim:
1. A video encoding device using motion-compensated inter-frame prediction for each block by dividing an image into blocks each having a predetermined size, designating one component value of a plurality of component values of a motion vector (MV) between an encoding target block and a neighboring block as a first component value, designating another component value as a second component value, and encoding each of the first component value and the second component value, the video encoding device comprising: a first component encoding circuit which obtains a difference value of a first component, which is a difference value between a predicted value of the first component value of the MV of the encoding target block generated from the first component value of the MV of the neighboring block and the first component value of the MV of the encoding target block, and encodes the obtained difference value of the first component; and a second component encoding circuit which obtains a probability of occurrence of a candidate value for a second component value of the MV of the encoding target block based on a first difference value between the first component value of the MV of the neighboring block and the first component value of the MV of the encoding target block, and also based on the second component value of the MV of the neighboring block, specifies a codeword of the second component value based on the occurrence probability, and encodes the second component value, wherein the second component encoding circuit estimates the occurrence probability using similarity between (1) the first difference value and (2) a second difference value between the second component value of the MV of the neighboring block and the second component value of the MV of the encoding target block.