JP7319468B2 - ビデオ復号化方法、電子装置、非一時的コンピュータ可読記憶媒体、及びプログラム - Google Patents
ビデオ復号化方法、電子装置、非一時的コンピュータ可読記憶媒体、及びプログラム Download PDFInfo
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- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
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Description
表1:MTSシグナリングのための符号化ユニットおよび変換ユニットの修正構文テーブル
表2:MTSシグナリングのための提案された変換ユニット構文テーブル
表3:MTSシグナリングのための追加の提案された変換ユニット構文テーブル
本出願は2019年11月21日に出願された「変換および係数シグナリングに関する方法および装置」という名称の米国仮特許出願第62/938,890号、および2020年1月10日に出願された「変換および係数シグナリングに関する方法および装置」という名称の米国仮特許出願第62/959,325号の優先権を主張し、これらの両方は、その全体が参照により組み込まれる。
Claims (10)
- 符号化された変換ブロックを有するビットストリームを受信し、
前記変換ブロックは、非ゼロ領域とゼロアウト領域とを含み、
前記ゼロアウト領域内に位置する前記変換ブロックの符号化グループの何れかが非ゼロ係数を有するか否か決定し、
非ゼロ係数を有する前記ゼロアウト領域内に位置する前記変換ブロックの符号化グループがないという決定に応じて、
前記ビットストリームから、多重変換選択(MTS)インデックスの値を受信し、
前記多重変換選択(MTS)インデックスの値に基づいて、前記変換ブロックの係数を変換するために、水平方向および垂直方向で各々の逆変換を適用する、
ビデオ復号化方法。 - 前記ゼロアウト領域内に位置する前記変換ブロックの符号化グループが非ゼロ係数を有するという決定に従って、
所定のデフォルト逆変換を適用して、前記変換ブロックの係数を、前記水平方向および垂直方向の両方で変換する、
ことをさらに含む、請求項1に記載のビデオ復号化方法。 - 前記変換ブロックの係数を変換するために、各々の逆変換を適用することは、
前記多重変換選択(MTS)インデックスが第1値を有するという決定に従って、
前記ビットストリームから、多重変換選択(MTS)水平フラグの値と多重変換選択(MTS)垂直フラグの値を受信し、
前記多重変換選択(MTS)水平フラグの値に基づいて、前記水平方向の前記変換ブロックの前記係数に水平逆変換を適用し、
前記多重変換選択(MTS)垂直フラグの値に基づいて、前記垂直方向の前記水平逆変換の後の前記変換ブロックの前記係数に垂直逆変換を適用し、
前記多重変換選択(MTS)インデックスが前記第1値とは異なる第2値を有するという決定に従って、
前記変換ブロックの前記係数を、前記水平方向および前記垂直方向の両方で所定のデフォルト変換を使用して変換する、
ことを含む、請求項1に記載のビデオ復号化方法。 - 前記所定のデフォルト逆変換は逆DCT-2変換であり、前記各々の逆変換のそれぞれは逆DST-7変換または逆DCT-8変換を含む、
請求項2に記載のビデオ復号化方法。 - 前記変換ブロックの彩度残差は彩度残差ジョイント符号化(JCCR)モードで符号化され、
変換スキップモードが対応する彩度変換ブロックに対してイネーブルされる、
請求項1に記載のビデオ復号化方法。 - 前記非ゼロ領域は、前記変換ブロックの左上の16×16領域である、請求項1に記載のビデオ復号化方法。
- 前記変換ブロックの係数の走査順序は、対角走査順序である、請求項1に記載のビデオ復号化方法。
- 電子装置であって、
1以上の処理ユニットと、
1以上の前記処理ユニットに結合されたメモリと、
1以上の前記処理ユニットによって実行されると、前記電子装置に請求項1~請求項7の何れか1項に記載のビデオ復号化方法を実行させる、前記メモリに記憶された複数のプログラムと、
を含む、
電子装置。 - 1以上の処理ユニットを有する電子装置によって実行される複数のプログラムを記憶する非一時的コンピュータ可読記憶媒体であって、複数の前記プログラムは、1以上の前記処理ユニットによって実行されると、前記電子装置に請求項1~請求項7の何れか1項に記載のビデオ復号化方法を実行させる、非一時的コンピュータ可読記憶媒体。
- 1以上の処理ユニットを有する電子装置によって実行されるプログラムであって、1以上の前記処理ユニットによって実行されると、前記電子装置に請求項1~請求項7の何れか1項に記載のビデオ復号化方法を実行させる、プログラム。
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MX2022006209A (es) | 2022-06-22 |
KR20220097913A (ko) | 2022-07-08 |
JP2022552580A (ja) | 2022-12-16 |
KR20240024338A (ko) | 2024-02-23 |
US20220286708A1 (en) | 2022-09-08 |
CN115004704A (zh) | 2022-09-02 |
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