JP6987938B2 - 映像符号化方法及び映像に対するデータの送信方法 - Google Patents
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Description
Claims (8)
- 映像符号化装置による映像符号化方法であって、
現在ブロックの中のクロマサンプルに対するイントラ予測モードを導出するステップと、
前記クロマサンプルに対する前記イントラ予測モードに基づいてシンタクス要素intra_chroma_pred_modeの値を決定するステップと、
前記シンタクス要素intra_chroma_pred_modeの値に基づいて前記シンタクス要素intra_chroma_pred_modeに対する一つのビンストリングのビンを符号化するステップとを含み、
前記シンタクス要素intra_chroma_pred_modeに対する前記ビンストリングの第1のビンはコンテキスト情報に基づいて符号化され、前記シンタクス要素intra_chroma_pred_modeに対する前記ビンストリングの残りのビンのそれぞれはバイパス符号化に基づいて符号化され、
前記コンテキスト情報は、オフセットと前記第1のビンに対する値の合計に基づいて表され、
前記オフセットは、前記現在ブロックを含むスライスのタイプに基づいて決定される、
方法。 - 前記シンタクス要素intra_chroma_pred_modeの値は、0から4のうちの一つに決定される、請求項1に記載の方法。
- 前記ビンを符号化するステップは、前記シンタクス要素intra_chroma_pred_modeに対する前記ビンストリングの複数のビンを互いに独立に符号化するステップを含む、請求項1に記載の方法。
- 前記シンタクス要素intra_chroma_pred_modeに対する前記ビンストリングの第1のビンは、前記シンタクス要素intra_chroma_pred_modeに対応するビンに対してコンテキストインデックスを割り当てるコンテキストインデックステーブルの前記ビンストリングの第1のビンに割り当てられたコンテキストインデックスに基づいて符号化される、請求項1に記載の方法。
- 前記ビンを符号化するステップは、コンテキストインデックステーブルを利用して前記シンタクス要素intra_chroma_pred_modeに対する前記ビンストリングの第1のビンを符号化するステップを含み、
前記コンテキストインデックステーブルは、オフセットと、前記シンタクス要素intra_chroma_pred_modeに対する前記ビンストリングの第1のビンに対するコンテキストインデックスを割り当てる、請求項1に記載の方法。 - 前記スライスのタイプは、Iスライス、Pスライス及びBスライスの一つである、請求項1に記載の方法。
- 前記オフセットは、前記スライスのタイプが前記Iスライスの時、0の値を有し、前記スライスのタイプが前記Pスライスの時、1の値を有し、前記スライスのタイプが前記Bスライスの時、2の値を有する、請求項6に記載の方法。
- 映像に対するデータの送信方法であって、
ビットストリームを取得するステップであって、前記ビットストリームは現在ブロックの中のクロマサンプルに対するイントラ予測モードを導出するステップを実行することにより生成される、ステップと、
前記クロマサンプルに対する前記イントラ予測モードに基づいてシンタクス要素intra_chroma_pred_modeの値を決定するステップと、
前記シンタクス要素intra_chroma_pred_modeの値に基づいて前記シンタクス要素intra_chroma_pred_modeに対する一つのビンストリングのビンを符号化するステップと、
前記ビットストリームを含む前記データを送信するステップとを含み、
前記シンタクス要素intra_chroma_pred_modeに対する前記ビンストリングの第1のビンはコンテキスト情報に基づいて符号化され、前記シンタクス要素intra_chroma_pred_modeに対する前記ビンストリングの残りのビンのそれぞれはバイパス符号化に基づいて符号化され、
前記コンテキスト情報は、オフセットと前記第1のビンに対する値の合計に基づいて表され、
前記オフセットは、前記現在ブロックを含むスライスのタイプに基づいて決定される、方法。
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