JP5770185B2 - 映像符号化方法、映像復号化方法 - Google Patents
映像符号化方法、映像復号化方法 Download PDFInfo
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Description
符号化された映像データは、映像の残存データを符号化して獲得される。
式(1)は、シフト演算を利用して、次の数式C=0.5(LeftDownPixel+RightUpPixel+1)>>1のように計算されてもよい。
A=(C*W1+LeftDownPixel*W2+((W1+W2)/2))/(W1+W2) (2)
式(2)で、W1+W2が2^nのように、2の指数乗の値を有する場合、A=(C*W1+LeftDownPixel*W2+((W1+W2)/2))/(W1+W2)は、A=(C*W1+LeftDownPixel*W2+2^(n−1))>>nのように、シフト演算を介して除算演算なしに計算可能である。
B=(C*h1+RightUpPixel*h2+((h1+h2)/2))/(h1+h2) (3)
式(3)で、h1+h2が2^mのように、2の指数乗の値を有する場合、B=(C*h1+RightUpPixel*h2+((h1+h2)/2))/(h1+h2)は、B=(C*h1+RightUpPixel*h2+2^(m−1))>>mのように、シフト演算を介して、除算演算なしに計算可能である。
Claims (2)
- 映像符号化方法において、
映像を最大サイズの最大符号化単位に分割し、前記最大符号化単位を階層構造の符号化単位に分割する段階と、
前記符号化単位のうち符号化される現在符号化単位の予測を行うための予測単位のイントラ予測モードを決定する段階と、
前記決定されたイントラ予測モードによって、前記予測単位に対するイントラ予測を行う段階と、を含み、
前記イントラ予測モードは、
複数の方向のうち特定方向を指し、前記特定方向は水平方向のピクセルの個数を表すdx(dxは整数)個のピクセル及び垂直方向のピクセルの個数を表すdy(dyは整数)個のピクセルのうち一つによって指され、
前記イントラ予測を行う段階は、
前記予測単位の現在ピクセルの位置及び前記イントラ予測モードによって指される前記特定方向によって、前記予測単位の左側及び上側のうち一つに位置した少なくとも一つの周辺ピクセルを獲得し、前記獲得された周辺ピクセルを用いて前記現在ピクセルの予測値を獲得することを特徴とする映像符号化方法。 - 映像復号化方法において、
ビットストリームから最大符号化単位のサイズ情報及び現在深度の符号化単位が下位深度の符号化単位に分割されるか否かを表す分割情報を抽出する段階と、
前記分割情報に基づき、最大符号化単位に含まれた階層構造の符号化単位を決定する段階と、
前記符号化単位のうち復号化される現在深度の符号化単位の予測を行うための予測単位を決定する段階と、
前記ビットストリームから、前記予測単位のイントラ予測モード情報を抽出する段階と、
前記抽出されたイントラ予測モードによって、前記予測単位に対するイントラ予測を行う段階と、を含み、
前記イントラ予測モードは、
複数の方向のうち特定方向を指し、前記特定方向は水平方向のピクセルの個数を表すdx(dxは整数)個のピクセル及び垂直方向のピクセルの個数を表すdy(dyは整数)個のピクセルのうち一つによって指され、
前記イントラ予測を行う段階は、
前記予測単位の現在ピクセルの位置及び前記イントラ予測モードによって指される前記特定方向によって、前記予測単位の左側及び上側のうち一つに位置した少なくとも一つの周辺ピクセルを獲得し、前記獲得された周辺ピクセルを用いて前記現在ピクセルの予測値を獲得することを特徴とする映像復号化方法。
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KR1020090075854A KR101452860B1 (ko) | 2009-08-17 | 2009-08-17 | 영상의 부호화 방법 및 장치, 영상 복호화 방법 및 장치 |
KR10-2009-0075854 | 2009-08-17 | ||
PCT/KR2010/005436 WO2011021838A2 (en) | 2009-08-17 | 2010-08-17 | Method and apparatus for encoding video, and method and apparatus for decoding video |
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JP2013211776A Division JP2014042321A (ja) | 2009-08-17 | 2013-10-09 | 映像の符号化方法及びその装置、映像復号化方法及びその装置 |
JP2013211775A Division JP2014042320A (ja) | 2009-08-17 | 2013-10-09 | 映像の符号化方法及びその装置、映像復号化方法及びその装置 |
JP2014099018A Division JP2014180026A (ja) | 2009-08-17 | 2014-05-12 | 映像復号化方法 |
JP2014099020A Division JP2014195290A (ja) | 2009-08-17 | 2014-05-12 | 映像復号化方法 |
JP2014099019A Division JP2014180027A (ja) | 2009-08-17 | 2014-05-12 | 映像復号化方法 |
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JP2014099020A Pending JP2014195290A (ja) | 2009-08-17 | 2014-05-12 | 映像復号化方法 |
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JP2015015776A Active JP5972411B2 (ja) | 2009-08-17 | 2015-01-29 | 映像復号化方法 |
JP2015015775A Active JP5969066B2 (ja) | 2009-08-17 | 2015-01-29 | 映像復号化方法 |
JP2016137203A Active JP6276336B2 (ja) | 2009-08-17 | 2016-07-12 | 映像復号化方法及び映像復号化装置 |
JP2016137202A Active JP6276335B2 (ja) | 2009-08-17 | 2016-07-12 | 映像復号化方法及び映像復号化装置 |
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JP2014099020A Pending JP2014195290A (ja) | 2009-08-17 | 2014-05-12 | 映像復号化方法 |
JP2014099019A Pending JP2014180027A (ja) | 2009-08-17 | 2014-05-12 | 映像復号化方法 |
JP2014099018A Pending JP2014180026A (ja) | 2009-08-17 | 2014-05-12 | 映像復号化方法 |
JP2015015776A Active JP5972411B2 (ja) | 2009-08-17 | 2015-01-29 | 映像復号化方法 |
JP2015015775A Active JP5969066B2 (ja) | 2009-08-17 | 2015-01-29 | 映像復号化方法 |
JP2016137203A Active JP6276336B2 (ja) | 2009-08-17 | 2016-07-12 | 映像復号化方法及び映像復号化装置 |
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JP2018002926A Active JP6646078B2 (ja) | 2009-08-17 | 2018-01-11 | 映像符号化方法、装置、及び記録媒体 |
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EP (10) | EP3654652B1 (ja) |
JP (11) | JP5770185B2 (ja) |
KR (1) | KR101452860B1 (ja) |
CN (6) | CN104702948B (ja) |
AU (1) | AU2010285491B2 (ja) |
BR (3) | BR122013020185A2 (ja) |
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SI (1) | SI3288262T1 (ja) |
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