JP6285487B2 - ブロッキングアーチファクトを除去する方法 - Google Patents
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Description
例えば、本願発明は以下の項目を提供する。
(項目1)
ブロッキングアーチファクトを除去する方法において、
8×8サンプルグリッド上の各4−サンプルエッジ毎に境界強度を決定するステップ;
前記境界強度が0でない場合、前記4−サンプルエッジにデブロッキングフィルタを実行するかどうかを決定するステップ;
前記4−サンプルエッジにデブロッキングフィルタが実行される場合、デブロッキングフィルタを選択するステップ;及び、
前記選択されたフィルタを利用して前記4−サンプルエッジをフィルタリングするステップ;を含むことを特徴とする方法。
(項目2)
前記4−サンプルエッジが変換ユニット境界でない、且つ前記4−サンプルエッジが予測ユニット境界でない場合、前記境界強度は、0に設定されることを特徴とする項目1に記載の方法。
(項目3)
前記境界強度は、0、1又は2であることを特徴とする項目1に記載の方法。
(項目4)
垂直4−サンプルエッジがフィルタリングされた後、水平エッジがフィルタリングされることを特徴とする項目1に記載の方法。
(項目5)
サンプルp0を含む予測ユニット又はサンプルq0を含む予測ユニットがイントラ符号化される場合、前記境界強度は、2に設定されることを特徴とする項目4に記載の方法。
(項目6)
前記サンプルp0を含む予測ユニット及び前記サンプルq0を含む予測ユニットがインター符号化される場合、前記境界強度は、0又は1に設定されることを特徴とする項目5に記載の方法。
×Nである。インター予測において、前記予測ユニットのサイズは、分割モードにより特定される。コーディングユニットが対称に分割されると、分割モードは、2N×2N、2N×N、N×2N及びN×Nのうち一つである。コーディングユニットが非対称に分割されると、分割モードは、2N×nU、2N×nD、nL×2N及びnR×2Nのうち一つである。
子化パラメータ、及び、4)以前コーディングユニットの量子化パラメータの順に検索さ
れる。
1)
1)
Claims (8)
- 復元ピクチャの後処理方法であって、
予測モードに基づいて予測ブロックを生成するステップ;
量子化係数情報を逆スキャニングして量子化ブロックを生成するステップ;
量子化パラメータを利用して前記量子化ブロックを逆量子化して変換ブロックを生成するステップ;
前記変換ブロックを逆変換して残差ブロックを生成するステップ;
前記予測ブロックと前記残差ブロックを利用して復元ブロックを生成するステップ;
変換ユニット又は予測ユニットの境界であり、且つ8×8サンプルグリッド上に位置する4−サンプルエッジ毎に境界強度を決定するステップ;
前記4−サンプルエッジの境界強度が0でない場合、前記4−サンプルエッジにデブロッキングフィルタを実行するかどうかを決定するステップ;
前記4−サンプルエッジにデブロッキングフィルタが実行される場合、前記4−サンプルエッジに適用するデブロッキングフィルタを選択するステップ;
前記選択されたフィルタを利用して前記4−サンプルエッジをフィルタリングするステップ;及び
サンプル適応的オフセット(SAO)タイプがエッジオフセットの場合、エッジオフセットを適用するステップ;を含み、
前記量子化パラメータは、残差量子化パラメータと量子化パラメータ予測子を利用して誘導し、
前記量子化パラメータ予測子は、少なくとも一つのコーディングユニットを含む量子化ユニット単位で誘導し、
前記境界強度を決定するステップにおいては、前記8×8サンプルグリッド上に位置しない4−サンプルエッジに対しては境界強度を決定せず、
前記4−サンプルエッジをフィルタリングするステップにおいては、4−サンプル垂直エッジがフィルタリングされた後、4−サンプル水平エッジがフィルタリングされる復元ピクチャの後処理方法。 - 前記4−サンプルエッジが変換ユニットの境界及び予測ユニットの境界のいずれでもない場合、前記境界強度は、0に設定されることを特徴とする請求項1に記載の方法。
- 前記4−サンプルエッジの境界強度は、0、1又は2であることを特徴とする請求項1に記載の方法。
- 境界量子化パラメータを利用して前記4−サンプルエッジにデブロッキングフィルタを実行するかどうかを決定し、前記境界量子化パラメータは、前記4−サンプルエッジの両側に位置するサンプルp0とサンプルq0について、前記サンプルp0を含むブロックの量子化パラメータと前記サンプルq0を含むブロックの量子化パラメータの平均値に設定されることを特徴とする請求項1に記載の方法。
- 境界量子化パラメータを利用してデブロッキングフィルタを選択することを特徴とする請求項4に記載の方法。
- 前記量子化パラメータは、残差量子化パラメータと量子化パラメータ予測子を利用して誘導し、左側量子化パラメータ、上側量子化パラメータ、以前量子化パラメータのうち少なくとも二つの量子化パラメータが利用可能な場合、左側量子化パラメータ、上側量子化パラメータ、以前量子化パラメータの順に選択される二つの利用可能な量子化パラメータの平均値が前記量子化パラメータ予測子に設定されることを特徴とする請求項1に記載の方法。
- 前記二つの利用可能な量子化パラメータの平均値は、四捨五入されることを特徴とする請求項6に記載の方法。
- 前記左側量子化パラメータ及び前記上側量子化パラメータが両方とも利用可能でない場合、前記以前量子化パラメータを前記量子化パラメータ予測子に設定することを特徴とする請求項6に記載の方法。
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KR20130049524A (ko) * | 2011-11-04 | 2013-05-14 | 오수미 | 인트라 예측 블록 생성 방법 |
AR092786A1 (es) * | 2012-01-09 | 2015-05-06 | Jang Min | Metodos para eliminar artefactos de bloque |
CN105791865B (zh) * | 2014-12-22 | 2020-01-17 | 江苏省电力公司南京供电公司 | 帧内预测及去块滤波方法 |
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EP3571844A1 (en) | 2017-03-23 | 2019-11-27 | Huawei Technologies Co., Ltd. | Apparatus and method for de-blocking filtering |
CN107715535A (zh) * | 2017-11-20 | 2018-02-23 | 嘉兴光跃环境工程设备有限公司 | 一种新型节能水过滤器 |
SG11202009401YA (en) | 2018-03-28 | 2020-10-29 | Huawei Tech Co Ltd | An image processing device and method for performing efficient deblocking |
BR112021002210A2 (pt) | 2018-08-10 | 2021-05-04 | Huawei Technologies Co., Ltd. | aparelho e método para realizar desblocagem |
MX2021002464A (es) | 2018-09-05 | 2021-04-29 | Panasonic Ip Corp America | Codificador, decodificador, metodo de codificacion y metodo de decodificacion. |
CN109345476A (zh) * | 2018-09-19 | 2019-02-15 | 南昌工程学院 | 基于深度残差网络的高光谱图像超分辨率重建方法及装置 |
NZ774817A (en) | 2018-09-24 | 2023-07-28 | Huawei Tech Co Ltd | Image processing device and method for performing quality optimized deblocking |
WO2020141880A1 (ko) * | 2019-01-02 | 2020-07-09 | 엘지전자 주식회사 | 영상 코딩 시스템에서 디블록킹 필터링을 사용하는 영상 디코딩 방법 및 장치 |
CN117676169A (zh) * | 2019-01-02 | 2024-03-08 | Lg 电子株式会社 | 使用去块滤波的图像编译方法和装置 |
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