JP2011083031A - ビデオ符号化における参照ピクチャの適応重み付け - Google Patents
ビデオ符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3
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。
Claims (2)
- 複数の画像ブロックを有するピクチャのビデオデータを生成するために符号化する方法であって、前記ビデオデータは、前記複数の画像ブロックのうちの画像ブロックの符号化データを含み、第1の参照ピクチャ・インデックス及び第2の参照ピクチャ・インデックスを含み、
前記画像ブロック、前記画像ブロックを符号化するための前記第1の参照ピクチャ・インデックス、及び前記画像ブロックを符号化するための前記第2の参照ピクチャ・インデックスにアクセスする工程であって、前記第1の参照ピクチャ・インデックスは第1の参照ピクチャに対応し、前記第2の参照ピクチャ・インデックスは第2の参照ピクチャに対応する工程と、
前記第1の参照ピクチャ及び第2の参照ピクチャを使用し、前記第1の参照ピクチャ・インデックスに対応する第1の重み付け係数を使用し、前記第2の参照ピクチャ・インデックスに対応する第2の重み付け係数を使用して前記画像ブロックを符号化する工程とを含み、
前記第1の参照ピクチャ・インデックスは、前記第1の参照ピクチャ及び前記第1の重み付け係数を定め、前記第2の参照ピクチャ・インデックスは、前記第2の参照ピクチャ及び前記第2の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、前記画像ブロックを符号化する工程は、
前記第1の参照ピクチャからの動き補償ブロックを識別する工程と、
第1の重み付け動き補償ブロックを形成するよう、前記第1の重み付け係数を使用して前記第1の参照ピクチャからの前記動き補償ブロックを重み付ける工程と、
第1のオフセットを求める工程と、
前記第2の参照ピクチャからの動き補償ブロックを識別する工程と、
第2の重み付け動き補償ブロックを形成するよう、前記第2の重み付け係数を使用して前記第2の参照ピクチャからの前記動き補償ブロックを重み付ける工程と、
第2のオフセットを求める工程と、
前記第1のオフセット及び前記第2のオフセットを使用して前記第1の重み付け動き補償ブロック及び前記第2の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。
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US60/395,843 | 2002-07-15 | ||
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