JP6372866B2 - ビデオ符号化における符号化ユニット量子化パラメータ - Google Patents
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Description
If(qp_predictor_mode==1)
deltaQP=(QP of current CU)−(QP of previous CU in coding order);
else if(qp_predictor_mode==2)
deltaQP=(QP of current CU)−(QP of spatially neighboring CUs)
ここで、qp_predictor_modeは、ビデオエンコーダの他の場所で選択される。デルタQP値を計算する2つ以上のモードが同様の方式で提供され得る。さらに、デルタQP、すなわちqp_predictor_mode、を計算するために使用されるモードは、例えば、シーケンス、ピクチャ、スライス、および/もしくはLCUレベルといった、適切なレベルで圧縮されたビットストリームで信号送信され得る。
rQP(A1)=dQP(A1)+rQP(B22 of LCU 0 1000)
rQP(A21)=dQP(A1)+rQP(A1)
rQP(A22)=dQP(A22)+rQP(A21)
rQP(A23)=dQP(A23)+rQP(A1)
rQP(A24)=dQP(A24)+rQP(A23)
rQP(A3)=dQP(A3)+rQP(B42 of LCU 0 1000)
rQP(A4)=dQP(A4)+rQP(A3)
本例では、再構成された量子化パラメータアレイ1004(B22、B24、B42、B44、D22、D24、D42、D44)の左の列は、すべて、予測f()をLCU 1 1002に適用することが要求される。左隣りのCUが、ピクチャの初期LCUの場合に見られるように、利用可能でない場合、予め規定されたQP値が使用され得るか、あるいはCU符号化の順序において再構成されたQP値が使用され得る。
Claims (8)
- ビデオ処理の方法であって、
ピクチャのための符号化されたビットストリームを受け取ることと、
前記符号化されたビットストリームを復号化し、ピクチャレベルで前記ビットストリーム内で信号送信されたパラメータから、複数の重複しないブロックの第1の重複しないブロックに対して第1の量子化パラメータが決定される符号化ユニットの最小サイズを決定することと、
複数の再構成された変換された係数を形成するために、前記第1の量子化パラメータを含む複数の量子化パラメータを用いて、複数の量子化された変換された係数に逆量子化動作を行なうことと、
を含む、方法。 - 請求項1に記載の方法であって、
前記ビデオ処理が、1つ又は複数のプロセッサ内に実装されるソフトウエアプログラムを含む信号処理ユニットに実装され、前記ソフトウエアプログラムが、メモリ内に格納されており、前記1つ又は複数のプロセッサ内にロードされて実行される、方法。 - ビデオ復号化の方法であって、
ピクチャのための符号化されたビットストリームを受け取ることと、
前記符号化されたビットストリームを復号化し、ピクチャレベルで前記ビットストリーム内で信号送信されたパラメータから、複数の重複しないブロックの第1の重複しないブロックに対して第1の量子化パラメータが決定される符号化ユニットの第1の最小サイズと、前記複数の重複しないブロックの第2の重複しないブロックに対して第2の量子化パラメータが決定される符号化ユニットの第2の最小サイズとを決定することと、
複数の再構成された変換された係数を形成するために、前記第1の量子化パラメータと前記第2の量子化パラメータとを含む複数の量子化パラメータを用いて、複数の量子化された変換された係数に逆量子化動作を行なうことと、
を含む、方法。 - 請求項3に記載の方法であって、
前記ビデオ処理が、1つ又は複数のプロセッサ内に実装されるソフトウエアプログラムを含む信号処理ユニットに実装され、前記ソフトウエアプログラムが、メモリ内に格納されており、前記1つ又は複数のプロセッサ内にロードされて実行される、方法。 - ビデオ処理システムであって、
ビデオデコーダ構成要素であって、
ピクチャのための符号化されたビットストリームを受け取り、
前記符号化されたビットストリームを復号化し、ピクチャレベルで前記ビットストリーム内で信号送信されたパラメータから、複数の重複しないブロックの第1の重複しないブロックに対して第1の量子化パラメータが決定される符号化ユニットの最小サイズを決定する、
ように構成される、前記ビデオデコーダ構成要素と、
前記ビデオデコーダ構成要素に結合され、複数の再構成された変換された係数を形成するために、前記第1の量子化パラメータを含む複数の量子化パラメータを用いて、複数の量子化された変換された係数に逆量子化動作を行なうように構成される、逆量子化構成要素と、
を含む、システム。 - 請求項5に記載のビデオ処理システムであって、
前記ビデオ処理システムが、1つ又は複数のプロセッサ内に実装されるソフトウエアプログラムを含む信号処理ユニットに実装され、前記ソフトウエアプログラムが、メモリ内に格納されており、前記1つ又は複数のプロセッサ内にロードされて実行される、システム。 - ビデオ復号化システムであって、
ビデオデコーダ構成要素であって、
ピクチャのための符号化されたビットストリームを受け取り、
前記符号化されたビットストリームを復号化し、ピクチャレベルで前記ビットストリーム内で信号送信されたパラメータから、複数の重複しないブロックの第1の重複しないブロックに対して第1の量子化パラメータが決定される符号化ユニットの第1の最小サイズと、前記複数の重複しないブロックの第2の重複しないブロックに対して第2の量子化パラメータが決定される符号化ユニットの第2の最小サイズとを決定する、
ように構成される、前記ビデオデコーダ構成要素と、
前記ビデオデコーダ構成要素に結合される逆量子化構成要素であって、複数の再構成された変換された係数を形成するために、前記第1の量子化パラメータと前記第2の量子化パラメータとを含む複数の量子化パラメータを用いて、複数の量子化された変換された係数に逆量子化動作を行なうように構成される、前記逆量子化構成要素と、
を含む、システム。 - 請求項7に記載のビデオ復号化システムであって、
前記ビデオ復号化システムが、1つ又は複数のプロセッサ内に実装されるソフトウエアプログラムを含む信号処理ユニットに実装され、前記ソフトウエアプログラムが、メモリ内に格納されており、前記1つ又は複数のプロセッサ内にロードされて実行される、システム。
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