JP2014195290A - 映像復号化方法 - Google Patents
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Abstract
【解決手段】ビットストリームから復号化される現在ブロックに適用されたイントラ予測モード情報を抽出する段階と、抽出されたイントラ予測モードによって現在ブロックに対するイントラ予測を行う段階を含む。イントラ予測を行う段階は、現在ブロックの現在ピクセルの位置およびイントラ予測モードによって指される特定方向によって、現在ブロックの左側及び上側に存在するピクセルのうち獲得する周辺ピクセルの個数を獲得する段階と、周辺ピクセルの個数が1と決定された場合、1つの周辺ピクセルに基づき現在ピクセルの予測値を獲得する段階と、周辺ピクセルの個数が2と決定された場合、2つの周辺ピクセルの加重平均値に基づき、現在ピクセルの予測値を獲得する段階と、を含む。
【選択図】図1
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)
- 映像復号化方法において、
ビットストリームから復号化される現在ブロックに適用された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現在ブロックに対するイントラ予測を行う段階を含み、
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、
前記現在ブロックの現在ピクセルの位置およ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、前記現在ブロックの左側及び上側に存在するピクセルのうち獲得する周辺ピクセルの個数を獲得する段階と、
前記周辺ピクセルの個数が1と決定された場合、1つの周辺ピクセルに基づき現在ピクセルの予測値を獲得する段階と、
前記周辺ピクセルの個数が2と決定された場合、2つの周辺ピクセルの加重平均値に基づき、前記現在ピクセルの予測値を獲得する段階と、を含み、
前記映像は、最大符号化単位のサイズに関する情報によって複数の最大符号化単位に分割され、
前記最大符号化単位は、分割情報によって深度を有する多数の符号化単位に階層的に分割され、
現在深度の符号化単位は、上位深度の符号化単位から分割された正四角データ単位のうち一つであり、
前記分割情報が前記現在振動で分割されることを表す場合、前記現在深度の符号化単位は周辺符号化単位と独立して下位深度の符号化単位に分割され、
前記分割情報が前記下位深度で分割されていないことを表す場合、少なくとも一つの予測単位は前記下位深度の符号化単位から獲得されることを特徴とする映像復号化方法。 - 前記現在ブロックは、現在深度の符号化単位の予測復号化のためのデータ単位の予測単位であることを特徴とする請求項1に記載の映像復号化方法。
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KR1020090075854A KR101452860B1 (ko) | 2009-08-17 | 2009-08-17 | 영상의 부호화 방법 및 장치, 영상 복호화 방법 및 장치 |
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JP2013211775A Pending 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 |
JP2013211776A Pending 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 |
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JP2015015776A Active JP5972411B2 (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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EP (10) | EP2928188A1 (ja) |
JP (11) | JP5770185B2 (ja) |
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CN (6) | CN104702949B (ja) |
AU (1) | AU2010285491B2 (ja) |
BR (3) | BR122013020185A2 (ja) |
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CY (1) | CY1121266T1 (ja) |
DK (2) | DK3288262T3 (ja) |
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JP7543486B2 (ja) | 2018-09-13 | 2024-09-02 | フラウンホファー ゲセルシャフト ツール フェールデルンク ダー アンゲヴァンテン フォルシュンク エー.ファオ. | アフィン線形加重イントラ予測 |
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