JP6076436B2 - 映像のイントラ予測符号化方法、イントラ予測復号化方法及びその装置 - Google Patents
映像のイントラ予測符号化方法、イントラ予測復号化方法及びその装置 Download PDFInfo
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Description
110 イントラ予測部
120 動き推定部
125 動き補償部
130 周波数変換部
140 量子化部
150 エントロピ符号化部
160 逆量子化部
170 周波数逆変換部
180 デブロッキング部
190 ループ・フィルタリング部
2000 映像復号化装置
2010 パージング部
2020 エントロピ復号化部
2030 逆量子化部
2040 周波数逆変換部
2050 イントラ予測部
2060 動き補償部
2070 デブロッキング部
2080 ループ・フィルタリング部
Claims (2)
- 複数の方向のうち特定方向を指す現在ブロックのイントラ予測モードをビットストリームから獲得する段階と、
前記イントラ予測モードに基づき前記現在ブロックについてのイントラ予測を行う段階とを含み、
前記特定方向は水平方向にdx(dxは整数)及び垂直方向に固定された整数によって指されたり、垂直方向にdy(dyは整数)及び水平方向に固定された整数によって指され、
前記イントラ予測を行う段階は、
前記特定方向を指すdx及びdyのうち一つと現在ピクセルの位置に基づいたシフト演算によって前記現在ブロックの左側または上側に位置した周辺ピクセルの位置を決定する段階と、
前記周辺ピクセルの個数が1である時、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である時、2つの周辺ピクセルの加重和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dx、dyは前記現在ブロックのイントラ予測モードによって{32、26、21、17、13、9、5、2、0、−2、−5、−9、−13、−17、−21、−26}のうち一つの値を有することを特徴とする映像復号化方法。 - 複数の方向のうち特定方向を指す現在ブロックのイントラ予測モードをビットストリームから獲得するエントロピー復号化部と、
前記イントラ予測モードに基づき前記現在ブロックについてのイントラ予測を行うイントラ予測部とを備え、
前記特定方向は水平方向にdx(dxは整数)及び垂直方向に固定された整数によって指されたり、垂直方向にdy(dyは整数)及び水平方向に固定された整数によって指され、
前記イントラ予測部は、
前記特定方向を指すdx及びdyのうち一つと現在ピクセルの位置に基づいたシフト演算によって前記現在ブロックの左側または上側に位置した周辺ピクセルの位置を決定し、
前記周辺ピクセルの個数が1である時、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し、
前記周辺ピクセルの個数が2である時、2つの周辺ピクセルの加重和に基づき前記現在ピクセルの予測値を獲得し、
前記dx、dyは前記現在ブロックのイントラ予測モードによって{32、26、21、17、13、9、5、2、0、−2、−5、−9、−13、−17、−21、−26}のうち一つの値を有することを特徴とする映像復号化装置。
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