JP6258980B2 - イントラ予測方法とそれを利用した符号化器及び復号化器 - Google Patents
イントラ予測方法とそれを利用した符号化器及び復号化器 Download PDFInfo
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- H04N19/105—Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
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- H04N19/182—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 a pixel
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Description
Claims (8)
- 復号化器により実行される映像を復号化する方法であって、
現在ブロックのイントラ予測モードに関する情報を受信するステップと、
前記イントラ予測モードに関する情報に基づいて、前記現在ブロックに対する前記イントラ予測モードを垂直予測モードとして決定するステップと、
前記垂直予測モードに基づいて、前記現在ブロックの予測ブロックを導出するステップであって、前記予測ブロックは、予測サンプルとフィルタリングされた予測サンプルを含む、ステップと、
前記導出された予測ブロックを用いて、復元ブロックを生成するステップと、
を有し、
前記予測サンプルは、前記現在ブロックの左側境界に隣接せず、前記フィルタリングされた予測サンプルは、前記現在ブロックの前記左側境界に隣接し、
予測サンプルは、前記予測サンプルに関して垂直予測方向に位置する参照サンプルに基づいて導出され、
フィルタリングされた予測サンプルは、前記フィルタリングされた予測サンプルに関して前記垂直予測方向に位置する第1の参照サンプル及び前記フィルタリングされた予測サンプルの左側に隣接する第2の参照サンプルに基づくフィルタリングを適用することにより導出される、復号化方法。 - 前記フィルタリングされた予測サンプルは、前記第1の参照サンプルと同じx座標を有し、前記フィルタリングされた予測サンプルは、前記第2の参照サンプルと同じy座標を有する、請求項1に記載の復号化方法。
- 前記フィルタリングされた予測サンプルに適用されるフィルタリング係数は、前記第2の参照サンプルに適用されるフィルタリング係数と同じである、請求項1に記載の復号化方法。
- 前記フィルタリングされた予測サンプルに適用されるフィルタリング係数は、前記第2の参照サンプルに適用されるフィルタリング係数より大きい、請求項1に記載の復号化方法。
- 映像を復号化する復号化器であって、
現在ブロックのイントラ予測モードに関する情報を受信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関する情報に基づいて、前記現在ブロックに対する前記イントラ予測モードを垂直予測モードとして決定し、前記垂直予測モードに基づいて、前記現在ブロックの予測ブロックを導出し、前記予測ブロックは、予測サンプルとフィルタリングされた予測サンプルを含む予測部と、
前記導出された予測ブロックを用いて、復元ブロックを生成する加算部と、
を有し、
前記予測サンプルは、前記現在ブロックの左側境界に隣接せず、前記フィルタリングされた予測サンプルは、前記現在ブロックの前記左側境界に隣接し、
予測サンプルは、前記予測サンプルに関して垂直予測方向に位置する参照サンプルに基づいて導出され、
フィルタリングされた予測サンプルは、前記フィルタリングされた予測サンプルに関して前記垂直予測方向に位置する第1の参照サンプル及び前記フィルタリングされた予測サンプルの左側に隣接する第2の参照サンプルに基づくフィルタリングを適用することにより導出される、復号化器。 - 前記フィルタリングされた予測サンプルは、前記第1の参照サンプルと同じx座標を有し、前記フィルタリングされた予測サンプルは、前記第2の参照サンプルと同じy座標を有する、請求項5に記載の復号化器。
- 前記フィルタリングされた予測サンプルに適用されるフィルタリング係数は、前記第2の参照サンプルに適用されるフィルタリング係数と同じである、請求項5に記載の復号化器。
- 前記フィルタリングされた予測サンプルに適用されるフィルタリング係数は、前記第2の参照サンプルに適用されるフィルタリング係数より大きい、請求項5に記載の復号化器。
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US (5) | US10368090B2 (ja) |
EP (5) | EP4398579A3 (ja) |
JP (6) | JP5869666B2 (ja) |
KR (8) | KR101968325B1 (ja) |
CN (5) | CN103621079B (ja) |
AU (7) | AU2012249024B2 (ja) |
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DE (1) | DE112012001609B9 (ja) |
DK (1) | DK2704435T3 (ja) |
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PL (4) | PL3471412T3 (ja) |
PT (2) | PT3471412T (ja) |
RU (6) | RU2627110C2 (ja) |
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