JP2011217105A5

JP2011217105A5 -

Info

Publication number: JP2011217105A5
Application number: JP2010083143A
Authority: JP
Filing date: 2010-03-31
Publication date: 2013-04-04
Anticipated expiration: 2030-03-31

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第１の動きベクトルを復号する動きベクトル復号部と、第１の動きベクトルより第２の動きベクトルを生成する動きベクトル分離部と、第２の動きベクトルを用いて第１の参照画像より抽出した、復号対象ブロック以上の大きさを持つ特定領域の第１の参照ブロックと、他の少なくとも１つの参照画像の所定領域とを合成した合成参照ブロックを生成する参照画像合成部と、第１の動きベクトルを用いて、復号対象ブロックと同じ大きさのブロックを合成参照ブロックより抽出し、その抽出したブロックを予測ブロックとする動き補償予測部と、予測ブロックと、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復号部とを備える。 In order to solve the above-described problem, a video decoding device according to an aspect of the present invention includes a motion vector decoding unit that decodes a first motion vector for a decoding target block from an encoded stream, and a first motion vector. A motion vector separation unit that generates two motion vectors, a first reference block in a specific area having a size equal to or larger than the decoding target block, extracted from the first reference image using the second motion vector, and the like A block having the same size as the decoding target block is extracted from the combined reference block using a reference image combining unit that generates a combined reference block that combines a predetermined region of at least one reference image and a first motion vector. , Adding the motion compensated prediction unit having the extracted block as a prediction block, the prediction block, and the prediction difference block decoded from the decoding target block The Rukoto, and a decoder for generating a decoded image.

Claims

A motion vector decoding unit for decoding the first motion vector for the decoding target block from the encoded stream;
A motion vector separation unit that generates a second motion vector from the first motion vector;
A first reference block of a specific area having a size equal to or larger than the decoding target block, extracted from the first reference image using the second motion vector, and a predetermined area of at least one other reference image; A reference image synthesis unit that generates a synthesized reference block;
Using the first motion vector, a block having the same size as the decoding target block is extracted from the synthesis reference block, and the extracted block is a prediction block;
A moving picture decoding apparatus comprising: a decoding unit that generates a decoded image by adding the prediction block and a prediction difference block decoded from the decoding target block.

In the motion vector separation unit, the accuracy of the input first motion vector is M pixel accuracy (M is a real number), and the accuracy of the second motion vector to be generated is N pixel accuracy (N is a real number: N > M), and the second motion vector is a value obtained by converting the first motion vector to N pixel accuracy,
The specific area, the location relative to the first reference image indicated by the second motion vector, motion picture according to claim 1, characterized in that it comprises a target block ± N / 2 pixels or more regions Image decoding device.

The reference image synthesis unit includes an inter-reference image motion vector detection unit that detects a third motion vector between the first reference block and a second reference image that is another reference image.
The reference image synthesis unit includes an average value or a weighted average value for each pixel of the second reference block extracted from the second reference image using the third motion vector and the first reference block. by calculating the moving picture decoding apparatus according to claim 1 or 2, characterized in that to generate the synthetic reference block.

The inter-reference image motion vector detection unit detects a plurality of third motion vectors between the first reference block and the second reference image in units of blocks smaller than the first reference block. And
The reference image synthesis unit combines a plurality of second reference blocks in small blocks extracted from the second reference image using the plurality of third motion vectors, and 4. The moving picture decoding apparatus according to claim 3 , wherein the synthesized reference block is generated by calculating an average value or a weighted average value for each pixel.

The inter-reference-picture motion vector detection unit detects two time differences between a first time difference between the first reference picture and the decoding target block and a second time difference between the second reference picture and the decoding target block. around the motion vector value obtained by converting the second motion vector according, by searching a motion within a predetermined range, according to claim 3 or 4, characterized in that detecting the third motion vector Video decoding device.

Decoding a first motion vector for a decoding target block from an encoded stream;
Generating a second motion vector from the first motion vector;
A first reference block of a specific area having a size equal to or larger than the decoding target block, extracted from the first reference image using the second motion vector, and a predetermined area of at least one other reference image; Generating a synthesized composite reference block;
Extracting a block having the same size as the decoding target block from the synthesis reference block using the first motion vector, and setting the extracted block as a prediction block;
A moving picture decoding method comprising: a step of adding a prediction block and a prediction difference block decoded from the decoding target block to generate a decoded image.

A function of decoding a first motion vector for a decoding target block from an encoded stream;
A function of generating a second motion vector from the first motion vector;
A first reference block of a specific area having a size equal to or larger than the decoding target block, extracted from the first reference image using the second motion vector, and a predetermined area of at least one other reference image; A function to generate a synthesized reference block;
A function of extracting a block having the same size as the decoding target block from the synthesis reference block using the first motion vector, and setting the extracted block as a prediction block;
A moving picture decoding program that causes a computer to realize a function of generating a decoded image by adding the prediction block and a prediction difference block decoded from the decoding target block.