JP2011234338A5

JP2011234338A5 -

Info

Publication number: JP2011234338A5
Application number: JP2010217755A
Authority: JP
Filing date: 2010-09-28
Publication date: 2012-11-29

Description

上記課題を解決するために、本発明のある態様の動画像復号装置は、符号化ストリームより、復号対象ブロックに対する複数の動きベクトルを復号する復号部（２０１）と、複数の動きベクトルを用いて、参照画像から前記復号対象ブロックに対応した複数の予測ブロックを生成し、複数の予測ブロックに基づいて境界を決定し、前記各予測ブロックを前記境界で分割して得た領域を前記各予測ブロック間で結合させることにより、合成予測ブロックを生成する動き補償部（２０３）と、前記合成予測ブロックと、前記復号対象ブロックから復号した予測差分ブロックとを加算することにより、復号画像を生成する加算部（２０９）とを備える。 In order to solve the above problems, a video decoding device according to an aspect of the present invention uses a decoding unit (201) that decodes a plurality of motion vectors for a decoding target block from an encoded stream, and a plurality of motion vectors. to generate a plurality of prediction blocks corresponding to the decoding target block from the reference image, to determine the boundaries on the basis of a plurality of prediction blocks, each predicts the obtained by dividing each prediction block in the boundary region By combining the blocks, a motion compensation unit (203) that generates a combined prediction block, the combined prediction block, and a prediction difference block decoded from the decoding target block are added to generate a decoded image. And an adding unit (209).

本発明の別の態様は、動画像復号方法である。この方法は、符号化ストリームより、復号対象ブロックに対する複数の動きベクトルを復号するステップと、複数の動きベクトルを用いて、参照画像から前記復号対象ブロックに対応した複数の予測ブロックを生成し、複数の予測ブロックに基づいて境界を決定し、前記各予測ブロックを前記境界で分割して得た領域を前記各予測ブロック間で結合させることにより、合成予測ブロックを生成するステップと、前記合成予測ブロックと、前記復号対象ブロックから復号した予測差分ブロックとを加算することにより、復号画像を生成するステップとを備える。 Another aspect of the present invention is a video decoding method. In this method, a plurality of motion vectors for a decoding target block are decoded from an encoded stream, and a plurality of prediction blocks corresponding to the decoding target block are generated from a reference image by using the plurality of motion vectors. determining the boundaries on the basis of the predicted block, by combining the obtained by dividing each prediction block in the boundary region between the respective prediction blocks, and generating a combined predicted block, the combined predicted Adding a block and a prediction difference block decoded from the decoding target block to generate a decoded image.

Claims

A decoding unit that decodes a plurality of motion vectors for the decoding target block from the encoded stream;
Using a plurality of motion vectors, a plurality of prediction blocks corresponding to the block to be decoded are generated from a reference image, a boundary is determined based on the plurality of prediction blocks, and each prediction block is divided by the boundary. A motion compensator that generates a combined prediction block by combining the predicted regions between the prediction blocks;
A moving picture decoding apparatus comprising: an adding unit that generates a decoded image by adding the synthesized prediction block and a prediction difference block decoded from the decoding target block.

The moving image decoding apparatus according to claim 1, wherein the motion compensation unit determines the boundary such that a region obtained by dividing each prediction block at the boundary is asymmetric.

The motion compensation unit, the moving picture decoding apparatus according to claim 1 or 2, characterized in that to determine the boundaries on the basis of the activity of a plurality of prediction blocks.

The motion compensation unit calculates an evaluation value corresponding to a boundary candidate based on an activity between adjacent pixels of a plurality of prediction blocks, and determines a boundary from the boundary candidates using the evaluation value. The moving picture decoding apparatus according to claim 3 .

Decoding a plurality of motion vectors for the decoding target block from the encoded stream;
Using a plurality of motion vectors, a plurality of prediction blocks corresponding to the block to be decoded are generated from a reference image, a boundary is determined based on the plurality of prediction blocks, and each prediction block is divided by the boundary. Generating a combined prediction block by combining the predicted regions between the respective prediction blocks;
A moving picture decoding method comprising: a step of generating a decoded image by adding the synthesized prediction block and a prediction difference block decoded from the decoding target block.

6. The moving picture decoding method according to claim 5 , wherein the step of generating a composite prediction block determines the boundary such that a region obtained by dividing each prediction block at the boundary is asymmetric .

A function of decoding a plurality of motion vectors for a decoding target block from an encoded stream;
Using a plurality of motion vectors, a plurality of prediction blocks corresponding to the block to be decoded are generated from a reference image, a boundary is determined based on the plurality of prediction blocks, and each prediction block is divided by the boundary. A function of generating a combined prediction block by combining the predicted regions between the respective prediction blocks;
A moving picture decoding program that causes a computer to realize a function of generating a decoded image by adding the synthesized prediction block and a prediction difference block decoded from the decoding target block.

8. The moving picture decoding program according to claim 7 , wherein the function of generating a composite prediction block determines the boundary such that a region obtained by dividing each prediction block at the boundary is asymmetric .