Video decoding apparatus, video coding apparatus, video decoding method, video coding method, and storage medium

摘要

A video decoding apparatus includes a reference picture list storing unit configured to store picture information of pictures; a motion vector information storing unit configured to store motion vector information including motion vectors of blocks that are spatially and temporally adjacent to a target block to be decoded and reference picture identifiers indicating pictures that the motion vectors refer to; and a vector predictor generating unit configured to scale a vector predictor candidate for a motion vector of the target block based on the picture information and the motion vector information and to correct the scaled vector predictor candidate toward 0 by a predetermined amount.

主权项

1. A video coding apparatus, comprising:
a reference picture list storing unit configured to store picture information of pictures; a motion vector information storing unit configured to store motion vector information including motion vectors of blocks that are spatially or temporally adjacent to a target block to be encoded, and reference picture identifiers indicating pictures that the motion vectors refer to; and a vector predictor generating unit configured to scale a vector predictor candidate of the target block based on the picture information and the motion vector information and to correct the scaled vector predictor candidate toward 0 by a predetermined amount, wherein the vector predictor generating unit includes
a scaling factor calculation unit configured to calculate a scaling factor based on the picture information and the motion vector information; anda scaling operation unit configured to scale the vector predictor candidate by the scaling factor and to correct the scaled vector predictor candidate by the predetermined amount; wherein the scaling operation unit includes
a scaling unit configured to multiply the vector predictor candidate by the scaling factor to scale the vector predictor candidate and increase a precision after the decimal point of the scaled vector predictor candidate to the predetermined precision after the decimal point,a correcting unit configured to correct the scaled vector predictor candidate toward 0 by the predetermined amount, andan adjusting unit configured to round the scaled and corrected vector predictor candidate to nearest integers.