JP7382494B2 - ビデオ符号化復号化における定量化および逆定量化設計のための方法及び装置 - Google Patents
ビデオ符号化復号化における定量化および逆定量化設計のための方法及び装置 Download PDFInfo
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- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
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Description
画像のCTUへの区画
木構造によるCTUの区画化
コア変換のマルチ変換選択(MTS)
定量化パラメータ制御
変換係数の定量化および逆定量化処理
変換スキップモードのための定量化および非定量化処理
パレットモードのための定量化および非定量化処理
変換スキップモード及びパレットモードのための定量化及び逆定量化の協調
Claims (9)
- ビットストリームから、第1の符号化ブロックについて定量化パラメータ及び定量化レベルを導出することと、
前記定量化パラメータに基づいてスケールレベル表をルックアップすることにより、スケール値を導出することと、
前記第1の符号化ブロックが変換スキップモードで符号化されたと決定したことに応じて、前記定量化レベル、前記スケール値、および複数のビットシフトに基づいて、パレットモードで符号化された第2の符号化ブロックにおけるエスケープサンプルに対して再構成のサンプルを取得するように配置されている第1の逆定量化演算を適用することで前記第1の符号化ブロックにおけるサンプルのための残差サンプルを取得することと、
を含み、
前記第1の逆定量化演算のパラメータは、前記第1の符号化ブロックまたは前記第2の符号化ブロックのブロックサイズにより決定されていない、ビデオ復号化のための方法。 - 第3の符号化ブロックが通常の変換モードで符号化されたと決定したことに応じて、前記第1の逆定量化演算と異なる第2の逆定量化演算を適用することにより、前記第3の符号化ブロックにおけるサンプルのための残差サンプルを取得することとを更に含み、
前記第2の逆定量化演算のパラメータは、前記第1の符号化ブロックのブロックサイズにより決定される、請求項1に記載の方法。 - 前記スケールレベル表は、levelScale[k] = { 40, 45, 51, 57, 64, 72 }であり、ここで、k = 0...5である、請求項1に記載の方法。
- 前記ビットストリームにおいて、エスケープサンプルが前記第2の符号化ブロックに存在するかどうかを示すエスケープフラグを受信すること、
を更に含む、請求項1に記載の方法。 - 前記複数のビットシフトは、QP/6ビットの左シフトおよび6ビットの右シフトを含み、ここで、QPは前記定量化パラメータである、請求項1に記載の方法。
- 前記第1の逆定量化演算が次のとおりであり、
- 1つまたは複数のプロセッサと、
前記1つまたは複数のプロセッサに接続されている非一時的なメモリと、
前記非一時的なメモリに格納されている複数のプログラムと、
を含み、
前記複数のプログラムは、前記1つまたは複数のプロセッサによって実行されると、前記1つまたは複数のプロセッサに、
請求項1~6のいずれか1項に記載の方法を実行させる、コンピューティング装置。 - 1つまたは複数のプロセッサを有するコンピューティング装置によって実行される複数のプログラムを格納している非一時的なコンピュータ読取可能な記憶媒体であって、
前記複数のプログラムは、前記1つまたは複数のプロセッサによって実行されると、前記1つまたは複数のプロセッサに、
請求項1~6のいずれか1項に記載の方法を実行させる、非一時的なコンピュータ読取可能な記憶媒体。 - プロセッサによって実行されると、前記プロセッサに請求項1~6のいずれか一項に記載の方法を実行させる命令を含む、コンピュータプログラム。
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CN114827605A (zh) | 2022-07-29 |
WO2021061744A1 (en) | 2021-04-01 |
EP4035368A4 (en) | 2022-11-30 |
KR102487062B1 (ko) | 2023-01-09 |
JP2022541076A (ja) | 2022-09-21 |
US20220217349A1 (en) | 2022-07-07 |
KR20230127375A (ko) | 2023-08-31 |
KR20220054900A (ko) | 2022-05-03 |
KR102571893B1 (ko) | 2023-08-28 |
MX2022003471A (es) | 2022-04-19 |
JP2023162319A (ja) | 2023-11-08 |
KR20230125862A (ko) | 2023-08-29 |
KR20230006060A (ko) | 2023-01-10 |
JP7382494B6 (ja) | 2023-11-29 |
CN114450948A (zh) | 2022-05-06 |
EP4035368A1 (en) | 2022-08-03 |
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