JP2016184801A - 動画像符号化装置 - Google Patents
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- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/157—Assigned coding mode, i.e. the coding mode being predefined or preselected to be further used for selection of another element or parameter
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- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
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- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
- H04N19/176—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object the region being a block, e.g. a macroblock
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Abstract
【解決手段】演算部1は、入力画像から予測画像を減算する。直交変換部2は、演算部1の出力に対して直交変換を施す。量子化部3は、直交変換部2の出力を量子化する。符号化部4は、量子化部3の出力を符号化する。予測モード判定部11は、入力画像からIピクチャ、Pピクチャ、及びBピクチャの種類に応じて異なる予測モードを判定する。
【選択図】図1
Description
ここで、nはブロックサイズ、Xは画素値、X(―)はブロックサイズ内の画素値Xの平均値を示す。なお、アクティビティを取得するブロックサイズは任意である。また、隣接画素間差分絶対値和は数式2から求められる。
ここで、nはブロックサイズ、X,Yは隣接する画素の画素値を示す。なお、隣接画素間差分絶対値和を取得するブロックサイズは任意である。
既存の評価値 = D + λ * H ・・・数式3
ここで、Dは入力画像と予測画像の誤差、λは重み付け係数、Hは予測時に必要なヘッダコストを示す。評価値が小さい程、データ量が小さい又は入力画像との誤差も小さく符号化効率が良いモードであることを意味する。本実施の形態は、数式2に示した既存の評価値を見直さずそのまま使用しオフセット値を加算するだけで容易に実施することができる。
Claims (4)
- 入力画像から予測画像を減算する演算部と、
前記演算部の出力に対して直交変換を施す直交変換部と、
前記直交変換部の出力を量子化する量子化部と、
前記量子化部の出力を符号化する符号化部と、
前記入力画像からIピクチャ、Pピクチャ、及びBピクチャの種類に応じて異なる予測モードを判定する予測モード判定部とを備えることを特徴とする動画像符号化装置。 - 前記予測モード判定部は、前記Iピクチャについてはイントラ予測モードを適用し、前記Pピクチャ及び前記Bピクチャについては前記イントラ予測モードとインター予測モードの何れかを選択して適用することを特徴とする請求項1に記載の動画像符号化装置。
- 前記予測モード判定部は、前記入力画像から平坦領域を判定する平坦領域判別パラメータを算出し、前記入力画像の符号化対象ブロックの周囲のブロックの前記平坦領域判別パラメータからモードオフセット値を求め、前記モードオフセット値を加算した評価値をもとに、前記符号化対象ブロックにおける前記イントラ予測モードの中から最適なモードを選択して適用することを特徴とする請求項2に記載の動画像符号化装置。
- 前記予測モード判定部は、前記入力画像から平坦領域を判定する平坦領域判別パラメータを算出し、前記入力画像の符号化対象ブロックの周囲のブロックの前記平坦領域判別パラメータからイントラオフセット値を求め、前記イントラオフセット値を加算した評価値をもとに、前記符号化対象ブロックにおける前記イントラ予測モードと前記インター予測モードの何れかを選択して適用することを特徴とする請求項2又は3に記載の動画像符号化装置。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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JP2015062905A JP6052319B2 (ja) | 2015-03-25 | 2015-03-25 | 動画像符号化装置 |
BR112017017282-8A BR112017017282A2 (ja) | 2015-03-25 | 2016-03-03 | Video coding equipment |
EP21167177.1A EP3869799B1 (en) | 2015-03-25 | 2016-03-03 | Moving image encoding device |
US15/548,673 US20180020233A1 (en) | 2015-03-25 | 2016-03-03 | Moving image encoding device |
PCT/JP2016/056641 WO2016152446A1 (ja) | 2015-03-25 | 2016-03-03 | 動画像符号化装置 |
EP16768349.9A EP3276959B1 (en) | 2015-03-25 | 2016-03-03 | Moving image encoding device |
US16/452,025 US11432005B2 (en) | 2015-03-25 | 2019-06-25 | Moving image encoding device |
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JP2015062905A JP6052319B2 (ja) | 2015-03-25 | 2015-03-25 | 動画像符号化装置 |
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JP2016184801A true JP2016184801A (ja) | 2016-10-20 |
JP6052319B2 JP6052319B2 (ja) | 2016-12-27 |
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JP2015062905A Active JP6052319B2 (ja) | 2015-03-25 | 2015-03-25 | 動画像符号化装置 |
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US (2) | US20180020233A1 (ja) |
EP (2) | EP3869799B1 (ja) |
JP (1) | JP6052319B2 (ja) |
BR (1) | BR112017017282A2 (ja) |
WO (1) | WO2016152446A1 (ja) |
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JP6272194B2 (ja) * | 2014-09-24 | 2018-01-31 | 株式会社日立情報通信エンジニアリング | 動画像符号化装置、動画像復号装置、および動画像符号化・復号化方法 |
JP6052319B2 (ja) * | 2015-03-25 | 2016-12-27 | Nttエレクトロニクス株式会社 | 動画像符号化装置 |
WO2018066980A1 (ko) * | 2016-10-04 | 2018-04-12 | 김기백 | 영상 데이터 부호화/복호화 방법 및 장치 |
US10687054B2 (en) * | 2017-12-20 | 2020-06-16 | Intel Corporation | Decoupled prediction and coding structure for video encoding |
JP2019201388A (ja) * | 2018-05-18 | 2019-11-21 | 富士通株式会社 | 情報処理装置、情報処理方法、及びプログラム |
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- 2015-03-25 JP JP2015062905A patent/JP6052319B2/ja active Active
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- 2016-03-03 US US15/548,673 patent/US20180020233A1/en not_active Abandoned
- 2016-03-03 BR BR112017017282-8A patent/BR112017017282A2/ja active Search and Examination
- 2016-03-03 EP EP21167177.1A patent/EP3869799B1/en active Active
- 2016-03-03 EP EP16768349.9A patent/EP3276959B1/en active Active
- 2016-03-03 WO PCT/JP2016/056641 patent/WO2016152446A1/ja active Application Filing
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2019
- 2019-06-25 US US16/452,025 patent/US11432005B2/en active Active
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Also Published As
Publication number | Publication date |
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EP3276959B1 (en) | 2021-05-19 |
BR112017017282A2 (ja) | 2018-04-17 |
WO2016152446A1 (ja) | 2016-09-29 |
JP6052319B2 (ja) | 2016-12-27 |
EP3276959A1 (en) | 2018-01-31 |
US20180020233A1 (en) | 2018-01-18 |
EP3869799A1 (en) | 2021-08-25 |
EP3869799B1 (en) | 2022-09-14 |
US20190320201A1 (en) | 2019-10-17 |
EP3276959A4 (en) | 2018-10-17 |
US11432005B2 (en) | 2022-08-30 |
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