JP6158802B2 - 復号装置および復号方法 - Google Patents
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Description
(a)前記復号装置は、複数の画素を表す動画像のブロックを表すビットストリームを受信し、
(b)前記復号装置は、コンテキスト適応2値算術符号化により符号化された前記ビットストリームを復号し、
(c)前記復号装置は、少なくとも2つの復号モードを用いて前記ビットストリームを復号し、前記第1のモードは、復号されている現シンタックス要素に基づく確率推定に基づいて前記ビットストリームを復号し、前記第2のモードは、復号されている前記現シンタックス要素に基づく確率推定に基づかないで前記ビットストリームを復号し、
(d)前記復号装置は、前記第1のモードを用いてイントラ予測モードを復号するために、イントラ予測モードのリストを用いるべきかどうかを示すデータを復号し、
(e)前記復号装置は、前記第2のモードを用いて対象ブロックのイントラ予測モードを示すデータを復号する、復号装置であって、
イントラ予測モードの前記リストは、前に決定されたイントラ予測モードに基づいて決定される。
(a)復号装置は、複数の画素を表す動画像のブロックを表す量子化された係数を含んだビットストリームを受信し、
(b)復号装置は、コンテキスト適応2値算術符号化を用いてビットストリームを復号し、
(c)コンテキスト適応2値算術符号化は、少なくとも復号されている現シンタックス要素に空間的および時間的に隣接するシンタックス要素値の少なくとも1つに基づく確率推定に基づいてビットストリームを復号する第1のモードと、第2のモードは、復号されている現シンタックス要素への他のシンタックス要素に基づく確率推定に基づかないでビットストリームを復号する第2のモードを含み、
(d)コンテキスト適応2値算術符号化は、現シンタックス要素がイントラ符号化されている場合に第1のモードを用い、プロバブルモードの第1のセットおよびプロバブルモードの第2のセットから選択して、現シンタックス要素を復号し、プロバブルモードの第1のセットは、プロバブルモードの第2のセットより尤度が高く、
(e)コンテキスト適応2値算術符号化は、現シンタックス要素がイントラ符号化されている場合、かつプロバブルモードの第2のセットの1つのうちから選択する場合に、第2のモードを用いて現シンタックス要素を復号する。
Claims (4)
- 画像を復号する復号装置であって、
ビットストリームを受信する受信手段と、
コンテキストを用いて算術復号を行うレギュラー復号エンジンと、コンテキストを用いずに算術復号を行うバイパス復号エンジンのいずれか1つを用いて前記ビットストリームを復号する復号手段と、
複数の予測モードから予測モードを選択する選択手段とを含み、
前記復号手段は、予測モードが、対象ブロックに隣接する1以上の隣接ブロックの予測モードを含む予測モードリストから選択されるか否かを示す第1の情報を復号し、
前記第1の情報が、前記対象ブロックの予測モードが前記予測モードリストから選択されることを示す場合、前記復号手段は、前記バイパス復号エンジンを用いて、前記予測モードリストから予想モードを選択するために使用される第2の情報を復号することを特徴とする復号装置。 - 前記復号手段は、前記レギュラー復号エンジンを用いて、前記第1の情報を復号することを特徴とする請求項1に記載の復号装置。
- 前記第1の情報は、フラグで示されることを特徴とする請求項1又は2に記載の復号装置。
- 画像を復号する復号方法であって、
ビットストリームを受信する受信手段と、
コンテキストを用いて算術復号を行うレギュラー復号エンジンと、コンテキストを用いずに算術復号を行うバイパス復号エンジンのいずれか1つを用いて前記ビットストリームを復号する復号手段と、
複数の予測モードから予測モードを選択する選択手段とを含み、
前記復号手段は、予測モードが、対象ブロックに隣接する1以上の隣接ブロックの予測モードを含む予測モードリストから選択されるか否かを示す第1の情報を復号し、
前記第1の情報が、前記対象ブロックの予測モードが前記予測モードリストから選択されることを示す場合、前記復号手段は、前記バイパス復号エンジンを用いて、前記予測モードリストから予想モードを選択するために使用される第2の情報を復号することを特徴
とする復号方法。
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US13/291,015 US9088796B2 (en) | 2011-11-07 | 2011-11-07 | Video decoder with enhanced CABAC decoding |
US13/291,015 | 2011-11-07 | ||
PCT/JP2012/007139 WO2013069273A1 (en) | 2011-11-07 | 2012-11-07 | Video decoder with enhanced cabac decoding |
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JP2017112361A Division JP6739770B2 (ja) | 2011-11-07 | 2017-06-07 | 強化されたcabac復号を用いた画像復号装置 |
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JP2014533002A JP2014533002A (ja) | 2014-12-08 |
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JP6158802B2 true JP6158802B2 (ja) | 2017-07-05 |
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JP2017112361A Active JP6739770B2 (ja) | 2011-11-07 | 2017-06-07 | 強化されたcabac復号を用いた画像復号装置 |
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US (8) | US9088796B2 (ja) |
EP (4) | EP2777281B1 (ja) |
JP (2) | JP6158802B2 (ja) |
CN (2) | CN107046642B (ja) |
DK (2) | DK2777281T3 (ja) |
ES (2) | ES2805626T3 (ja) |
HR (1) | HRP20201220T1 (ja) |
HU (2) | HUE037562T2 (ja) |
IN (1) | IN2014CN03477A (ja) |
NO (1) | NO2895849T3 (ja) |
PL (2) | PL2777281T3 (ja) |
PT (2) | PT2777281T (ja) |
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