JP2021530124A - ビデオサンプルの変換されたブロックを符号化および復号するための方法、装置、およびシステム - Google Patents
ビデオサンプルの変換されたブロックを符号化および復号するための方法、装置、およびシステム Download PDFInfo
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Abstract
Description
(a)メモリ位置228、229、230から命令231をフェッチまたは読出すフェッチ動作
(b)制御部239が、どの命令がフェッチされたかを判定するデコード動作
(c)制御部239及び/又はALU240が命令を実行する動作を実行する
を有する。
説明された構成は、コンピュータ及びデータ処理産業に適用可能であり、特に、ビデオ及び画像信号などの信号の復号を符号化するためのデジタル信号処理に適用可能であり、残差係数の非局所的なスキャンによるメモリ帯域幅に関して過度のコストなしに高い圧縮効率を達成する。
本発明を定義する請求項は以下の通りである。
Claims (14)
- ビットストリームから画像フレーム内の変換ブロックを復号する方法であって、
前記ビットストリームから単一の切り捨てられた単項の二値化を復号することと、該単一の切り捨てられた単項の二値化は、前記画像フレームの変換ブロックの水平変換および垂直変換のために使用され、
前記復号された単一の切り捨てられた単項の二値化に基づいて、水平および垂直変換のタイプを決定することと、
前記決定されたタイプの水平および垂直変換を、画像の前記変換ブロックに適用することによって、前記画像フレーム内の前記変換ブロックを復号することと
を有することを特徴とする方法。 - 前記水平および垂直変換のタイプは、変換設定と変換インデックスとの間のマッピングにより決定され、前記変換設定および前記変換インデックスは、前記復号された単一の切り捨てられた単項の二値化に基づいて決定されることを特徴とする請求項1に記載の方法。
- 前記決定された変換設定は、変換タイプDST−VIIおよびDST−VIIIを含む変換設定0であることを特徴とする請求項2に記載の方法。
- 前記単一の切り捨てられた単項の二値化は、前記画像フレームの前記変換ブロックの前記水平変換および前記垂直変換をそれぞれ選択するための水平変換選択および垂直変換選択を符号化することを特徴とする請求項1に記載の方法。
- 前記単一の切り捨てられた単項の二値化における前記水平変換選択および前記垂直変換選択は、前記水平および垂直変換選択が発生する可能性に基づいて符号化されることを特徴とする請求項4に記載の方法。
- 前記水平および垂直変換のタイプの決定は、
前記ビットストリームからイントラ予測モードを復号することと、
前記復号されたイントラ予測モードに基づいて、前記水平および垂直変換選択を決定することと
を有することを特徴とする請求項1に記載の方法。 - 前記水平変換は、前記垂直変換の前に前記画像フレームの前記変換ブロックに適用されることを特徴とする請求項1に記載の方法。
- コンピュータアプリケーションプログラムを含む非一時的なコンピュータ可読媒体であって、前記プログラムは、ビットストリームから画像フレーム内の変換ブロックを復号する方法をコンピュータに実行させるためにコンピュータ装置によって実行可能であり、前記方法は、
前記ビットストリームから単一の切り捨てられた単項の二値化を復号することと、該単一の切り捨てられた単項の二値化は、前記画像フレームの変換ブロックの水平変換および垂直変換のために使用され、
前記復号された単一の切り捨てられた単項の二値化に基づいて、水平および垂直変換のタイプを決定することと、
前記決定されたタイプの水平および垂直変換を、画像の前記変換ブロックに適用することによって、前記画像フレーム内の前記変換ブロックを復号することと
を有することを特徴とする、非一時的なコンピュータ可読媒体。 - 前記水平および垂直変換のタイプは、変換設定と変換インデックスとの間のマッピングにより決定され、前記変換設定および前記変換インデックスは、前記復号された単一の切り捨てられた単項の二値化に基づいて決定されることを特徴とする請求項8に記載の非一時的なコンピュータ可読媒体。
- 前記決定された変換設定は、変換タイプDST−VIIおよびDST−VIIIを含む変換設定0であることを特徴とする請求項9に記載の非一時的なコンピュータ可読媒体。
- 前記単一の切り捨てられた単項の二値化は、前記画像フレームの前記変換ブロックの前記水平変換および前記垂直変換をそれぞれ選択するための水平変換選択および垂直変換選択を符号化することを特徴とする請求項8に記載の非一時的なコンピュータ可読媒体。
- 前記単一の切り捨てられた単項の二値化における前記水平変換選択および前記垂直変換選択は、前記水平および垂直変換選択が発生する可能性に基づいて符号化されることを特徴とする請求項11に記載の非一時的なコンピュータ可読媒体。
- 前記水平および垂直変換のタイプの決定は、
前記ビットストリームからイントラ予測モードを復号することと、
前記復号されたイントラ予測モードに基づいて、前記水平および垂直変換選択を決定することと
を有することを特徴とする請求項8に記載の非一時的なコンピュータ可読媒体。 - 前記水平変換は、前記垂直変換の前に前記画像フレームの前記変換ブロックに適用されることを特徴とする請求項8に記載の非一時的なコンピュータ可読媒体。
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CN117560513A (zh) | 2024-02-13 |
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US11445191B2 (en) | 2022-09-13 |
AU2018204786A1 (en) | 2020-01-16 |
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