JP2023500168A - パレットモードを使用するビデオ符号化の方法及び装置 - Google Patents
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Abstract
Description
本出願は、2020年1月11日付け出願の「VIDEO CODING USING PALETTE MODE(パレットモードを使用するビデオ符号化)」を名称とする米国仮出願第62/959,913号の優先権の主張を伴うものであり、その全体が参照によって組み込まれる。
Claims (8)
- ビデオデータを復号する方法であって、
ビットストリームから、符号化ユニットに関連した複数のシンタックス要素を受け取るステップであって、前記複数のシンタックス要素が前記符号化ユニットのサイズ及び符号化ツリータイプを示す、ステップと、
前記符号化ユニットの前記符号化ツリータイプに応じて、前記符号化ユニットの最小のパレットモード・ブロックサイズを決定するステップと、
前記符号化ユニットの前記サイズが前記最小のパレットモード・ブロックサイズよりも大きいとの決定に応じて、
前記ビットストリームから、前記符号化ユニットに関連したパレットモード有効化フラグを受け取り、
前記パレットモード有効化フラグに応じて、前記ビットストリームから前記符号化ユニットを復号するステップと
を含む、方法。 - 請求項1に記載の方法であって、
前記パレットモード有効化フラグに応じて前記ビットストリームから前記符号化ユニットを復号する前記ステップは、
前記符号化ユニットに対して前記パレットモードが有効化されたと前記パレットモード有効化フラグが示すとき、
前記ビットストリームから現在のユニット用のパレットテーブルを生成し、
前記生成されたパレットテーブルを使用して、前記ビットストリームから前記符号化ユニットを復号するステップ
をさらに含む、方法。 - 請求項1に記載の方法であって、
前記符号化ユニットの前記符号化ツリータイプに応じて、前記符号化ユニットの最小のパレットモード・ブロックサイズを決定する前記ステップは、
前記符号化ユニットの前記符号化ツリータイプがSINGLE_TREE又はDUAL_TREE_LUMAであるときには、
前記最小のパレットモード・ブロックサイズを16サンプルに設定し、
前記符号化ユニットの前記符号化ツリータイプがDUAL_TREE_CHROMAであるときには、
前記符号化ユニットの色差フォーマットを決定して、
前記色差フォーマットに応じて前記最小のパレットモード・ブロックサイズを設定する、
ステップをさらに含む、方法。 - 請求項3に記載の方法であって、前記色差フォーマットが4:4:4であるとき、前記最小のパレットモード・ブロックサイズは16サンプルである、方法。
- 請求項3に記載の方法であって、前記色差フォーマットが4:2:2であるとき、前記最小のパレットモード・ブロックサイズは32サンプルである、方法。
- 請求項3に記載の方法であって、前記色差フォーマットが4:2:0であるとき、前記最小のパレットモード・ブロックサイズは64サンプルである、方法。
- 電子装置であって、
1つ以上の処理部と、
前記1つ以上の処理部に接続されたメモリと、
前記メモリに記憶された複数のプログラムと
を備え、
前記複数のプログラムが、前記1つ以上の処理部によって実行されたとき、前記電子装置に、請求項1から6のいずれか一項に記載の方法を実施させる、電子装置。 - 1つ以上の処理部を有する電子装置によって実行するための複数のプログラムを記憶している非一時的なコンピュータ読み取り可能な記録媒体であって、前記複数のプログラムは、前記1つ以上の処理部によって実行されると、前記電子装置に、請求項1から6のいずれか一項に記載の方法を実施させる、非一時的なコンピュータ読み取り可能な記録媒体。
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PCT/US2021/012964 WO2021142446A1 (en) | 2020-01-11 | 2021-01-11 | Methods and apparatus of video coding using palette mode |
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