JP2022008296A - 省略符号化を用いた映像符号化及び復号化装置及びその方法 - Google Patents
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Abstract
Description
Claims (3)
- 映像復号化方法であって、
復号化対象信号に省略符号化を行うか否かを示すインジケータに対してエントロピ復号化を行うステップと、
前記インジケータが、前記復号化対象信号に対して前記省略符号化が行われないことを示すとき、前記復号化対象信号の残差信号に対してエントロピ復号化を行うステップと、
前記インジケータに基づいて前記復号化対象信号に画面内予測を実行する時、前記復号化対象信号より先に再構成された信号に対してフィルタリングを実行するステップと、
前記フィルタリングされた信号を用いて前記復号化対象信号の予測信号を生成するステップと、
前記予測信号と前記残差信号に基づいて前記復号化対象信号の復元された信号を生成するステップと、 を備え、
前記再構成された信号に対してフィルタリングを実行するステップは、
前記再構成された信号からフィルタリング対象信号を判別するステップであって、前記フィルタリング対象信号は、前記復号化対象信号の変換ユニットの境界に隣接する少なくとも一つの画素を含む、前記ステップと、
フィルタ強度と、前記境界に隣接する前記画素の少なくとも一つを用いた計算式の結果値との少なくとも一つに基づいて、前記フィルタリング対象信号に対してフィルタリングを実行するステップと、
を備え、
前記フィルタリングにおいて用いられるフィルタの前記フィルタ強度は、可変的に決定され、前記フィルタの前記フィルタ強度は、映像符号化装置から送信されたフラグを用いて決定され、
前記フィルタリングを実行するか否かは、前記復号化対象信号に関連するブロックの大きさに基づいて決定される、映像復号化方法。 - 映像符号化方法であって、
符号化対象信号に省略符号化を行うか否かを決定し、及びインジケータを用いて前記決定された結果に符号化を行うステップと、
前記符号化対象信号に画面内予測を実行する時、前記符号化対象信号より先に符号化され再構成された信号に対してフィルタリングを実行するステップと、
前記フィルタリングされた信号を用いて前記符号化対象信号の予測信号を生成するステップと、
前記符号化対象信号から前記予測信号を差し引くことによって、前記符号化対象信号の残差信号を生成するステップと、
前記符号化対象信号の前記残差信号に対してエントロピ符号化を行うステップと、
を備え、
前記再構成された信号に対してフィルタリングを実行するステップは、
前記符号化対象信号より先に符号化され前記再構成された前記信号からフィルタリング対象信号を判別するステップであって、前記フィルタリング対象信号は、前記符号化対象信号の変換ユニットの境界に隣接する少なくとも一つの画素を含む、前記ステップと、
フィルタ強度と、前記境界に隣接する前記画素の少なくとも一つを用いた計算式の結果値との少なくとも一つに基づいて、前記フィルタリング対象信号に対してフィルタリングを実行するステップと、
を備え、
前記フィルタリングにおいて用いられたフィルタの前記フィルタ強度は、可変的に決定され、フラグを用いて符号化され、
前記フラグは、映像復号化装置に送信され、
前記フィルタリングを実行するか否かは、前記符号化対象信号に関連するブロックの大きさに基づいて決定され、
前記インジケータが、前記省略符号化が行われることを示すとき、前記残差信号に関する情報は、前記映像復号化装置に送信されない、映像符号化方法。 - 映像を再構成するため映像復号化装置によって受信され復号化されるビットストリームを格納する、コンピュータが読み取り可能な非一時的記録媒体であって、
前記ビットストリームは、復号化対象信号に省略符号化を行うか否かを示すインジケータと、映像符号化装置から送信されたフラグとを有し、
前記インジケータが、前記復号化対象信号に対して前記省略符号化が行われないことを示すとき、前記復号化対象信号の残差信号が前記ビットストリームからエントロピ復号化され、
前記インジケータは、前記復号化対象信号に画面内予測を行うか否かを決定するために用いられ、前記画面内予測は、フィルタリングされた信号を生成するために、前記復号化対象信号より先に再構成された信号にフィルタリングを行うステップを有し、
前記フィルタリングされた信号は、前記復号化対象信号の予測信号を生成するために用いられ、
前記予測された信号は、前記復号化対象信号の前記残差信号とともに、前記復号化対象信号の再構成された信号を生成するために用いられ、
前記再構成された信号に対してフィルタリングを実行するステップは、
前記再構成された信号からフィルタリング対象信号を判別するステップであって、前記フィルタリング対象信号は、前記復号化対象信号の変換ユニットの境界に隣接する少なくとも一つの画素を含む、前記ステップと、
フィルタ強度と、前記境界に隣接する前記画素の少なくとも一つを用いた計算式の結果値との少なくとも一つに基づいて、前記フィルタリング対象信号に対してフィルタリングを実行するステップと、
を備え、
前記フィルタリングにおいて用いられたフィルタの前記フィルタ強度は、可変的に決定され、映像符号化装置から送信された前記フラグは、前記フィルタ前記フィルタ強度を決定するために用いられ、
前記復号化対象信号に関連するブロックの大きさは、前記フィルタリングを行うか否かを決定するために用いられる、映像復号化方法。
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