JP2010124513A - ビデオ復号化における参照ピクチャの適応重み付け - Google Patents
ビデオ復号化における参照ピクチャの適応重み付け Download PDFInfo
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Abstract
【解決手段】復号器(300)は特定の参照ピクチャ・インデックスに相当する重み付け係数を判定する参照重み付け係数装置(380)を含み;符号器(500)は特定の参照ピクチャ・インデックスに相当する重み付け係数を割り当てる参照ピクチャ重み付け係数割り当て器(572)を含み;復号化する方法は、画像ブロックに相当する、上記データを伴う参照ピクチャ・インデックスを受信する工程、受信参照ピクチャ・インデックス毎に重み付け係数を判定する工程、インデックス毎に参照ピクチャを取り出す工程、取り出した参照ピクチャの動き補償を行う工程、及び動き補償参照ピクチャを相当する重み付け係数によって乗算して重み付け動き補償参照ピクチャを形成する工程を含む。
【選択図】図6
Description
Pred=〔(P0)(Pred0)〕+〔(P1)(Pred1)〕+D;
であり、P0とP1とは重み付け係数であり、Pred0とPred1とは、リスト0とリスト1との各々についての参照ピクチャ予測であり、Dはオフセットである。
Pred= W0 * Pred0 + D0 (1);
として形成され、W0はリスト0参照ピクチャに関連した重み付け係数であり、D0はリスト0参照ピクチャに関連したオフセットであり、Pred0はリスト0参照ピクチャからの動き補償予測ブロックである。
Pred = W1 * Pred1 + D1 (2);
として形成され、W1はリスト1参照ピクチャと関連した重み付け係数であり、D0はリスト1参照ピクチャと関連したオフセットであり、Pred1はリスト1参照ピクチャからの動き補償予測ブロックである。
Pred=(P0*Pred0+D0+P1*Pred1+D1)/2 (3);
として形成する。
614 工程
Claims (3)
- 複数の画像ブロックを有するピクチャのビデオ信号データを復号化する方法であって、前記ビデオ信号データは、前記複数の画像ブロックのうちの画像ブロックのデータを含み、少なくとも1つの参照ピクチャ・インデックスを含み、
前記ビデオ信号データを受信する工程であって、前記受信ビデオ信号データは、前記画像ブロックの前記データ及び前記画像ブロックの単一の参照ピクチャ・インデックスを含み、前記受信された単一の参照ピクチャ・インデックスは特定の参照ピクチャに対応する工程と、
前記単一の受信参照ピクチャ・インデックスに対応し、重み付け係数の組から求められる重み付け係数を使用して、前記単一の参照ピクチャ・インデックスに対応する前記特定の参照ピクチャを使用して、前記画像ブロックを予測する工程とを含み、
前記単一の受信参照ピクチャ・インデックスは、前記特定の参照ピクチャ及び前記重み付け係数を定めることを特徴とする方法。 - 請求項1記載の方法であって、予測する工程は、
前記特定の参照ピクチャからのブロックの動き補償を行う工程と、
前記重み付け係数を使用して前記動き補償ブロックを重み付ける工程と、
前記受信された単一の参照ピクチャ・インデックスに対応するオフセットを求める工程と、
前記オフセットを使用して前記重み付け動き補償ブロックを調節する工程とを含むことを特徴とする方法。 - 請求項2記載の方法であって、
前記画像ブロックの前記データに前記調節された重み付け動き補償ブロックを加えて前記画像ブロックを予測する工程を更に含むことを特徴とする方法。
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US39584302P | 2002-07-15 | 2002-07-15 | |
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US60/395,843 | 2002-07-15 | ||
US10/410,481 US7903742B2 (en) | 2002-07-15 | 2003-04-09 | Adaptive weighting of reference pictures in video decoding |
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JP2010055801A Expired - Lifetime JP5067901B2 (ja) | 2002-07-15 | 2010-03-12 | ビデオ復号化における参照ピクチャの適応重み付け |
JP2010055800A Expired - Lifetime JP4822467B2 (ja) | 2002-07-15 | 2010-03-12 | ビデオ復号化における参照ピクチャの適応重み付け |
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