JP2019216467A - 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 (9)
- 映像復号化方法であって、
現在ブロックの残差信号を生成するステップと、
前記現在ブロックの予測信号を生成するステップと、
前記残差信号及び前記予測信号に基づいて、前記現在ブロックを再構成するステップと、
前記再構成された現在ブロックにジブロッキングフィルタリングを行うステップと、
前記ジブロッキングフィルタリングされた現在ブロックに追加のフィルタリングを行うステップと、
を含む、映像復号化方法。 - 前記ジブロッキングフィルタリングを行うステップは、
少なくとも一つのフィルタ強度と、前記再構成された現在ブロックの境界に隣接するサンプルを用いて計算された結果値とに基づいて前記ジブロッキングフィルタリングを行うか否かを決定するステップを含む、請求項1に記載の映像復号化方法。 - 前記フィルタ強度は、前記現在ブロックの符号化パラメータに基づいて決定され、
前記符号化パラメータは、予測モード、動きベクトル、参照映像索引、及び符号化ブロックフラグのうちの少なくとも一つを含む、請求項2に記載の映像復号化方法。 - 前記ジブロッキングフィルタリングを行うステップは、
前記現在ブロックの境界はジブロッキングフィルタリングされるべきものであることを決定するステップを含み、
前記現在ブロックの前記境界は、スライス(slice)間の前記フィルタリングが可能か否かに基づいて決定される、請求項1に記載の映像復号化方法。 - 前記追加のフィルタリングは、最大符号化ユニット(LCU)のユニット内で実行される、請求項1に記載の映像復号化方法。
- 前記追加のフィルタリングを実行するステップは、
フィルタ係数を決定するステップと、
前記現在ブロックのサンプルのユニット内の前記フィルタ係数を適用するステップと、
を含む、請求項1に記載の映像復号化方法。 - 前記フィルタ係数は、各々のサンプルに対して可変的に決定される、請求項6に記載の映像復号化方法。
- 映像符号化方法であって、
現在ブロックの予測信号を生成するステップと、
前記予測信号を用いて、前記現在ブロックの残差信号を生成するステップと、
前記生成された残差信号に符号化を行うステップと、
前記符号化された残差信号に復号化を行うステップと、
前記復号化された残差信号と前記予測信号とに基づいて、前記現在ブロックを再構成するステップと、
前記再構成された現在ブロックにジブロッキングフィルタリングを行うステップと、
前記ジブロッキングフィルタリングされた現在ブロックに追加のフィルタリングを行うステップと、
を含む、映像符号化方法。 - 映像復号化装置によって受信され、画像に含まれる現在ブロックを再構成するために用いら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、前記現在ブロックの残差信号に関する情報と、前記現在ブロックの予測信号に関する情報とを有し、
前記現在ブロックの残差信号に関する前記情報は、前記現在ブロックの残差信号を生成するために用いられ、
前記現在ブロックの予測信号に関する前記情報は、前記現在ブロックの予測信号を生成するために用いられ、
前記残差信号及び前記予測信号は、前記現在ブロックを再構成するために用いられ、
前記再構成された現在ブロックはジブロッキングフィルタリングされ、そして追加のフィルタによってフィルタリングされる、コンピュータが読み取り可能な非一時的記録媒体。
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