JPWO2020005045A5 - - Google Patents

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JPWO2020005045A5
JPWO2020005045A5 JP2020573285A JP2020573285A JPWO2020005045A5 JP WO2020005045 A5 JPWO2020005045 A5 JP WO2020005045A5 JP 2020573285 A JP2020573285 A JP 2020573285A JP 2020573285 A JP2020573285 A JP 2020573285A JP WO2020005045 A5 JPWO2020005045 A5 JP WO2020005045A5
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merge candidate
video signal
motion information
current block
decoding
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JP2021532626A (en
JP7395518B2 (en
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Claims (13)

現在ブロックのマージ候補リストを構成するステップと、
前記マージ候補リストから前記現在ブロックの動き情報を導出するステップであって、前記動き情報は、予測方向のフラグ、参照ピクチャインデックスまたは動きベクトルのうちの少なくとも一つを含む、スッテプと、
前記動き情報を用いて、現在ブロックのインター予測を行うステップと、
を含み、
前記マージ候補リストが、空間的マージ候補、時間的マージ候補または組み合わせマージ候補のうち少なくとも1つを含み、
前記組み合わせマージ候補が、マージ候補リストに属しているn個のマージ候補を組み合わせて導出され、
前記組み合わせマージ候補が、第1のマージ候補及び第2のマージ候補を含み、前記組み合わせマージ候補の動き情報が、前記第1のマージ候補の動き情報と前記第2のマージ候補の動き情報を加重平均して導出される、ビデオ信号の復号化方法。
The steps that make up the current block merge candidate list, and
A step of deriving the motion information of the current block from the merge candidate list, wherein the motion information includes at least one of a flag in the prediction direction, a reference picture index, or a motion vector.
Using the motion information, the step of performing inter-prediction of the current block and
Including
The merge candidate list contains at least one of spatial merge candidates, temporal merge candidates, or combined merge candidates.
The combination merge candidate is derived by combining n merge candidates belonging to the merge candidate list.
The combination merge candidate includes a first merge candidate and a second merge candidate, and the motion information of the combination merge candidate weights the motion information of the first merge candidate and the motion information of the second merge candidate. A method of decoding video signals that is derived on average.
前記n個のマージ候補が、前記マージ候補リストにおける0から(n-1)のインデックスに対応するマージ候補である、請求項1に記載のビデオ信号の復号化方法。 The method for decoding a video signal according to claim 1, wherein the n merge candidates are merge candidates corresponding to indexes from 0 to (n-1) in the merge candidate list. 前記組み合わせマージ候補のインデックスが、前記時間的マージ候補のインデックスよりも大きい、請求項1に記載のビデオ信号の復号化方法。 The method for decoding a video signal according to claim 1, wherein the index of the combination merge candidate is larger than the index of the temporal merge candidate. 前記組み合わせマージ候補の動き情報が、前記第1のマージ候補の予測方向と前記第2のマージ候補の予測方向に基づいて導出される、請求項1に記載のビデオ信号の復号化方法。 The method for decoding a video signal according to claim 1, wherein the motion information of the combination merge candidate is derived based on the prediction direction of the first merge candidate and the prediction direction of the second merge candidate. 前記加重平均の重みが、[1:1]、[1:2]、[1:3]または[2:3]のいずれか1つである、請求項1に記載のビデオ信号の復号化方法。 The method for decoding a video signal according to claim 1, wherein the weight of the weighted average is any one of [1: 1], [1: 2], [1: 3], and [2: 3]. .. 前記動きベクトルは、現在ブロックのサブブロックの単位で導出される、請求項1に記載のビデオ信号の復号化方法。 The method for decoding a video signal according to claim 1, wherein the motion vector is derived in units of subblocks of the current block. 前記サブブロックのサイズは固定されたサイズである、請求項6に記載のビデオ信号の復号化方法。 The method for decoding a video signal according to claim 6, wherein the size of the subblock is a fixed size. 前記サブブロックのサイズは4×4である、請求項6又は7に記載のビデオ信号の復号化方法。 The method for decoding a video signal according to claim 6 or 7, wherein the size of the subblock is 4 × 4. 前記動き情報を用いて、現在ブロックのインター予測を行うステップは、
前記現在ブロックの参照ピクチャインデックスに基づいて、参照ピクチャリストから参照ピクチャを選択することと、
前記現在ブロックの動きベクトルに基づいて、前記参照ピクチャ内の参照ブロックを特定することと、
前記特定された参照ブロックの画素を用いて、現在ブロックの予測画素を生成することと、
前記現在ブロックの予測画素と残差画素を加算して現在ブロックを再構成することと、を含む、請求項1に記載のビデオ信号の復号化方法。
The step of performing inter-prediction of the current block using the motion information is
To select a reference picture from the reference picture list based on the reference picture index of the current block.
Identifying the reference block in the reference picture based on the motion vector of the current block.
Using the pixels of the identified reference block to generate the predicted pixels of the current block,
The method for decoding a video signal according to claim 1, wherein the current block is reconstructed by adding the predicted pixels and the residual pixels of the current block.
前記方法は、ビットストリームによりシグナリングされる残差係数に逆量子化または逆変換の少なくとも一方を行って前記残差画素を得ることを含む、請求項9に記載のビデオ信号の復号化方法。 The method for decoding a video signal according to claim 9, wherein the method comprises performing at least one of inverse quantization or inverse transformation on the residual coefficient signaled by the bitstream to obtain the residual pixel. インター予測を行うためのプログラムを格納するためのメモリと、
前記プログラムを実行して請求項1から10のいずれか一項に記載のビデオ信号の復号化方法を実行するためのプロセッサと、を備える、ビデオ信号の復号化装置。
Memory for storing programs for inter-prediction,
A video signal decoding device comprising a processor for executing the program to execute the video signal decoding method according to any one of claims 1 to 10.
現在ブロックのマージ候補リストを構成するステップと、
前記マージ候補リストから前記現在ブロックの動き情報を導出するステップであって、前記動き情報は、予測方向のフラグ、参照ピクチャインデックスまたは動きベクトルのうちの少なくとも一つを含む、スッテプと、
前記動き情報を用いて、現在ブロックのインター予測を行うステップと、
を含み、
前記マージ候補リストが、空間的マージ候補、時間的マージ候補または組み合わせマージ候補のうち少なくとも1つを含み、
前記組み合わせマージ候補が、マージ候補リストに属しているn個のマージ候補を組み合わせて導出され、
前記組み合わせマージ候補が、第1のマージ候補及び第2のマージ候補を含み、前記組み合わせマージ候補の動き情報が、前記第1のマージ候補の動き情報と前記第2のマージ候補の動き情報を加重平均して導出される、ビデオ信号の符号化方法。
The steps that make up the current block merge candidate list, and
A step of deriving the motion information of the current block from the merge candidate list, wherein the motion information includes at least one of a flag in the prediction direction, a reference picture index, or a motion vector.
Using the motion information, the step of performing inter-prediction of the current block and
Including
The merge candidate list contains at least one of spatial merge candidates, temporal merge candidates, or combined merge candidates.
The combination merge candidate is derived by combining n merge candidates belonging to the merge candidate list.
The combination merge candidate includes a first merge candidate and a second merge candidate, and the motion information of the combination merge candidate weights the motion information of the first merge candidate and the motion information of the second merge candidate. A method of encoding a video signal that is derived on average.
インター予測を行うためのプログラムを格納するためのメモリと、
前記プログラムを実行して請求項12に記載のビデオ信号の符号化方法を実行するためのプロセッサと、を備える、ビデオ信号の符号化装置。
Memory for storing programs for inter-prediction,
A video signal coding device comprising a processor for executing the program to execute the video signal coding method according to claim 12.
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