Video encoding device, video decoding device, and data structure

Abstract

On the basis of coding cost, a prediction vector candidate to be used as a prediction vector is selected from a first prediction vector candidate which is the median of the motion vectors allocated to the partitions around a partition to be encoded; and another prediction candidate which is selected from a second prediction vector candidate, which is the motion vector allocated to the contiguous partition on the left side of the partition to be encoded, and a third prediction vector candidate, which is the motion vector allocated to the collocated partition which occupies the same position in the decoded frame as the partition to be encoded, on the basis of the prediction accuracy of the third prediction vector candidate.

Description

technical field [0001] The present invention relates to a video encoding device that encodes video to generate encoded data. Also, it relates to a video decoding device that decodes coded data generated using such a video coding device. Background technique [0002] In order to efficiently transmit or record moving pictures, moving picture encoding devices are used. Also, motion compensation prediction using motion vectors is used for encoding of moving images in the moving image coding apparatus. H264 / AVC etc. are mentioned as a video coding method using motion compensation prediction. [0003] As a conventional general technique, a method is known in which an input moving image is divided into a plurality of partitions for each frame, and a partition to be coded (hereinafter referred to as a partition) is used among the plurality of partitions. The median (median value) of the motion vectors assigned to the left adjacent partition of the "object partition", the partitio...

AI Technical Summary

Problems solved by technology

In MV Competition, since a flag indicating which vector predictor candidate is selected from among a plurality of vector predictor candidates is encoded as a vector predictor for encoding, when a motion vector candidate with low precision is used, there may be a problem with The coding efficiency will decrease corresponding to the amount of marked code

[0010] For example, when the size of the target partition is small or the length of the motion vector allocated to the target partition is long, the prediction accuracy of the above-mentioned temporal predictor candidates tends to decrease. use such a trend

Images