JP6114362B2 - マージモードにおける映像復号化方法 - Google Patents
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Description
本発明はさらに、たとえば、以下を提供する。
(項目1)
現在予測ユニットの動き情報を誘導する方法において、
ビットストリームからマージインデックスを抽出するステップ;
利用可能な空間及び時間マージ候補を利用してマージリストを構築するステップ;
前記マージインデックスを利用してマージリスト上のマージ候補の中からマージ予測子を選択するステップ;及び、
前記マージ予測子の動き情報を前記現在予測ユニットの動き情報として設定するステップ;を含み、
前記時間マージ候補は、参照ピクチャインデックス及び動き情報を含み、前記時間マージ候補の参照ピクチャインデックスは、0に設定され、時間マージ候補ピクチャの時間マージ候補ブロックの動きベクトルが前記時間マージ候補の動きベクトルとして設定されることを特徴とする方法。
(項目2)
現在スライスがPスライスの場合、前記時間マージ候補ピクチャは、参照ピクチャリスト0の参照ピクチャの中から選択されることを特徴とする項目1に記載の方法。
(項目3)
前記時間マージ候補ブロックは、現在予測ユニットの位置に基づいて決定されることを特徴とする項目1に記載の方法。
(項目4)
第1の候補ブロックが利用可能な場合、前記第1の候補ブロックが時間マージ候補ブロックになり、第1の候補ブロックが利用可能でない場合、第2の候補ブロックが時間マージ候補ブロックになることを特徴とする項目1に記載の方法。
(項目5)
前記第1の候補ブロックは、右下側コーナーブロック又は動きベクトル格納ユニット内の前記右下側コーナーブロックの位置に基づいて変更されたブロックであることを特徴とする項目4に記載の方法。
(項目6)
前記動きベクトル格納ユニットは、16×16であることを特徴とする項目4に記載の方法。
(項目7)
現在予測ユニットが下側LCUと接する場合、前記第1の候補ブロックは、利用可能でないと設定されることを特徴とする項目4に記載の方法。
Claims (8)
- マージモードにおける映像復号化方法において、
受信されたビットストリームから量子化係数成分を抽出するエントロピー復号化ステップ;
利用可能な空間及び時間マージ候補を利用してマージリストを構築するステップ;
マージインデックスに対応する前記マージリスト内のマージ候補を現在予測ユニットの動き情報に設定するステップ;
前記動き情報を利用して現在予測ユニットの予測ブロックを生成するステップ;及び、
前記量子化係数成分を逆スキャンして量子化ブロックを生成し、量子化パラメータを利用して前記量子化ブロックを逆量子化し、前記逆量子化されたブロックを逆変換して残差ブロックを生成するステップ;を含み、
現在予測ユニットが水平非対称分割により分割された2番目の予測ユニットの場合、前記予測ユニットの上側予測ユニットに対応する空間マージ候補は、前記マージリストから排除され、
前記量子化パラメータは、量子化ユニット毎に誘導され、
前記量子化パラメータは、差分量子化パラメータ及び量子化パラメータ予測子を利用して誘導され、
前記量子化パラメータ予測子は、左側量子化パラメータ、上側量子化パラメータ及び以前量子化パラメータのうち少なくとも2個が有効の場合、予め決められた順序に決定される有効の2個の量子化パラメータの平均値であり、
前記時間マージ候補の動きベクトルは、時間マージ候補ピクチャ内の時間マージ候補ブロックの動きベクトルであり、前記時間マージ候補ブロックの動きベクトルは、前記時間マージ候補ブロックの位置に対応する動きベクトル格納ユニットの動きベクトルであることを特徴とする方法。 - 現在予測ユニットの参照ピクチャインデックスと前記動きベクトルは、マージインデックスにより特定されるマージ候補の参照ピクチャインデックスと動きベクトルであることを特徴とする請求項1に記載の方法。
- 前記量子化パラメータは、差分量子化パラメータ及び量子化パラメータ予測子を利用して誘導されることを特徴とする請求項1に記載の方法。
- 前記左側量子化パラメータが利用可能でない場合、前記上側量子化パラメータ及び以前量子化パラメータの平均値が量子化パラメータ予測子に設定されることを特徴とする請求項1に記載の方法。
- 前記時間マージ候補の参照ピクチャインデックスは、0に設定されることを特徴とする請求項1に記載の方法。
- 前記時間マージ候補ブロックの位置は、LCU内での現在ブロックの位置によって決定されることを特徴とする請求項1に記載の方法。
- 前記動きベクトル格納ユニットは、16×16であることを特徴とする請求項1に記載の方法。
- 前記量子化ユニットの最小サイズは、ピクチャパラメータセットによって決定されることを特徴とする請求項1に記載の方法。
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JP2020048612A Active JP6995910B2 (ja) | 2011-11-07 | 2020-03-19 | マージモードにおいて映像データを復号化する方法、マージモードにおいて映像データを符号化する方法 |
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EP (5) | EP3432580A1 (ja) |
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MX355319B (es) * | 2011-11-08 | 2018-04-16 | Kt Corp | Método y aparato para exploración de coeficientes con base en el modo de división de la unidad de predicción. |
EP4009640A1 (en) | 2011-11-08 | 2022-06-08 | Electronics and Telecommunications Research Institute | Method and device for sharing a candidate list |
JP5900308B2 (ja) * | 2011-12-16 | 2016-04-06 | 株式会社Jvcケンウッド | 動画像符号化装置、動画像符号化方法及び動画像符号化プログラム |
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