KR20170054561A - 인트라 예측 방향에 따른 예측 유닛들의 필터링 - Google Patents
인트라 예측 방향에 따른 예측 유닛들의 필터링 Download PDFInfo
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Abstract
Description
도 2는 비디오 데이터 압축해제를 사용하는 비디오 디스플레이 시스템을 개략적으로 나타낸 도면.
도 3은 비디오 데이터 압축 및 압축해제를 사용하는 오디오/비디오 저장 시스템을 개략적으로 나타낸 도면.
도 4는 비디오 데이터 압축을 사용하는 비디오 카메라를 개략적으로 나타낸 도면.
도 5는 비디오 데이터 압축 및 압축해제 장치의 개요도.
도 6은 예측된 이미지들의 생성을 개략적으로 나타낸 도면.
도 7은 최대 코딩 유닛(largest coding unit; LCU)을 개략적으로 나타낸 도면.
도 8은 4개의 코딩 유닛들(CU)의 세트를 개략적으로 나타낸 도면.
도 9 및 10은 보다 작은 코딩 유닛들로 서브-분할된 도 8의 코딩 유닛들을 개략적으로 나타낸 도면.
도 11은 예측 유닛들(PU)의 어레이를 개략적으로 나타낸 도면.
도 12는 변환 유닛들(TU)의 어레이를 개략적으로 나타낸 도면.
도 13은 부분적으로-인코딩된 이미지를 개략적으로 나타낸 도면.
도 14는 가능한 인트라-예측 방향들의 세트를 개략적으로 나타낸 도면.
도 15는 예측 모드들의 세트를 개략적으로 나타낸 도면.
도 16은 곧은 대각선 스캔을 개략적으로 나타낸 도면.
도 17은 비디오 압축 장치를 개략적으로 나타낸 도면.
도 18a 및 도 18b는 가능한 블록 크기들을 개략적으로 나타낸 도면들.
도 19는 크로마 및 루마 블록들로부터의 같은 장소에 위치된 정보(co-located information)의 사용을 개략적으로 나타낸 도면.
도 20은 하나의 크로마 채널로부터의 같은 장소에 위치된 정보가 또 다른 크로마 채널에 대하여 사용되는 상황을 개략적으로 나타낸 도면.
도 21은 LM-CHROMA 모드에 대해 사용되는 화소들을 개략적으로 나타낸 도면.
도 22는 루마 예측 방향들의 세트를 개략적으로 나타낸 도면.
도 23은 수평으로 희박한 크로마 채널에 적용되는, 도 22의 방향들을 개략적으로 나타낸 도면.
도 24는 직사각형 크로마 화소 어레이에 매핑되는 도 22의 방향들을 개략적으로 나타낸 도면.
도 25 내지 도 28은 루마 및 크로마 화소 보간을 개략적으로 나타낸 도면들.
도 29a 및 도 29b는 4:2:0 및 4:2:2 각각에 대한 양자화 매개변수 표들을 개략적으로 나타낸 도면들.
도 30 및 도 31은 양자화 변화 표를 개략적으로 나타낸 도면들.
| CU 크기 |
PU 옵션들 | TU 옵션들 | ||
| 레벨 0 | 레벨 1 | 레벨 2 | ||
| 64x64 | 64x64 | n/a | 32x32x4 | 16x16x4 |
| 64x32x2 (수평 구성) 64x16 + 64x48 (2개의 수평 구성들) |
n/a | 32x32x4 | 32x8x4 | |
| 32x64x2 (수직 구성) 16x64 + 48x64 (2개의 수직 구성들) |
n/a | 32x32x4 | 8x32x4 | |
| 32x32 | 32x32 | 32x32 | 16x16x4 | 8x8x4 |
| 32x16x2 (수평 구성) 32x8 + 32x24 (2개의 수평 구성들) |
n/a | 32x8x4 | 16x4x4 (루마) + 4x4x4 (크로마, 4:2:0 또는 4:2:2) 또는 8x4x4 (크로마, 4:2:2) |
|
| 16x32x2 (수직 구성) 8x32 + 24x32 (2개의 수직 구성들) |
n/a | 8x32x4 | 4x16x4 (루마) + 4x4x4 (크로마) | |
| 16x16 | 16x16 | 16x16 | 8x8x4 | 4x4x4 (루마) + 4x8x4 (크로마) |
| 16x8x2 (수평 구성) 16x4 + 16x12 (2개의 수평 구성들) |
n/a | 16x4x4 (루마) + 4x8x4 (크로마) (4:2:0 또는 4:2:2) 16x4x4 (루마) + 8x4x4 (크로마) (4:2:2) |
4x4x4 (루마) + 4x8x1 (크로마) (4:2:0 또는 4:2:2) 4x4x4 (루마) + 8x4x1 (크로마) (4:2:2) |
|
| 8x16x2 (수직 구성) 4x16 + 12x16 (2개의 수직 구성들) |
n/a | |||
| 8x8 | 8x8 4x4x4 8x4x2 (수평 구성) 4x8x2 (수직 구성) |
8x8 | 4x4x4 (루마) + 4x8x1 (크로마) | n/a |
| 4x4x4 (루마) + 4xN (크로마) | n/a | 4x4x4 (루마) + 4x8x1 (크로마) | n/a | |
30: 송신 루트 40: 압축해제 장치
120: 디스플레이
Claims (20)
- 인트라-예측 4:4:4 비디오를 나타내는 코딩 유닛들로부터 비디오 데이터를 디코딩하기 위한 비디오 디코딩 방법으로서, 상기 코딩 유닛들은 휘도 및 크로미넌스 샘플들을 갖고 3 개의 구성요소 타입으로 구성되고, 상기 비디오 디코딩 방법은,
각각의 구성요소 타입에 대한 선택된 예측 유닛에 관한 예측 방향을 검출하는 단계;
상기 예측 방향에 따라 샘플들의 예측된 블록을 생성하는 단계; 및
샘플들의 상기 예측된 블록 내의 샘플들의 좌측 열 및 샘플들의 상부 행을 필터링하는 단계
를 포함하고, 상기 필터링하는 단계는 단지 하나의 구성요소 타입의 예측 유닛으로부터의 샘플들의 예측된 블록에 적용되는, 비디오 디코딩 방법. - 제1항에 있어서,
상기 단지 하나의 구성요소 타입은 휘도 구성요소 타입인, 비디오 디코딩 방법. - 제1항 또는 제2항에 있어서,
4:4:4 비디오에 대해, 상기 필터링하는 단계는 2개의 크로미넌스 구성요소 타입의 예측 유닛에 적용되지 않는, 비디오 디코딩 방법. - 제1항 또는 제2항에 있어서,
상기 비디오 디코딩 방법은 휘도 블록에 대한 예측 데이터에서의 블록 기반 효과를 감소시키는, 비디오 디코딩 방법. - 제1항 또는 제2항에 있어서,
상기 디코딩은,
잔상 비디오 데이터를 엔트로피 디코딩하는 단계;
상기 잔상 비디오 데이터를 역양자화하는 단계;
상기 잔상 비디오 데이터를 역변환하고, 상기 잔상 비디오를 상기 예측된 비디오 데이터와 결합하고 상기 결합에 블록해제 필터를 적용하는 단계
를 더 포함하는, 비디오 디코딩 방법. - 제5항에 있어서,
상기 블록해제 필터를 적용하는 단계는 변환에 의해 도입된 효과를 제거 또는 감소시키는, 비디오 디코딩 방법. - 제1항 또는 제2항에 있어서,
상기 크로미넌스 구성요소 타입은 서브샘플링되지 않는, 비디오 디코딩 방법. - 제1항 또는 제2항에 있어서,
상기 예측 방향이 수평이면 샘플들의 상기 상부 행을 필터링하는 단계를 포함하는, 비디오 디코딩 방법. - 제1항 또는 제2항에 있어서,
상기 예측 방향이 수직이면 샘플들의 상기 좌측 열을 필터링하는 단계를 포함하는, 비디오 디코딩 방법. - 인트라-예측 4:4:4 비디오를 나타내는 코딩 유닛들로부터 비디오 데이터를 디코딩하기 위한 비디오 디코딩 장치로서, 상기 코딩 유닛들은 휘도 및 크로미넌스 샘플들을 갖고 3 개의 구성요소 타입으로 구성되고, 상기 비디오 디코딩 장치는,
각각의 구성요소 타입에 대한 선택된 예측 유닛에 관한 예측 방향을 검출하도록 구성된 검출기;
상기 예측 방향에 따라 샘플들의 예측된 블록을 생성하도록 구성된 생성기; 및
샘플들의 상기 예측된 블록 내의 샘플들의 좌측 열 및 샘플들의 상부 행을 필터링하도록 구성된 필터링 회로
를 포함하고, 상기 필터링은 단지 하나의 구성요소 타입의 예측 유닛으로부터의 샘플들의 예측된 블록에 적용되는, 비디오 디코딩 장치. - 제10항에 있어서,
상기 단지 하나의 구성요소 타입은 휘도 구성요소 타입인, 비디오 디코딩 장치. - 제10항 또는 제11항에 있어서,
4:4:4 비디오에 대해, 상기 필터링은 2개의 크로미넌스 구성요소 타입의 예측 유닛에 적용되지 않는, 비디오 디코딩 장치. - 제10항 또는 제11항에 있어서,
상기 필터링은 휘도 블록에 대한 예측 데이터에서의 블록 기반 효과를 감소시키는, 비디오 디코딩 장치. - 제10항 또는 제11항에 있어서,
상기 비디오 디코딩 장치는,
잔상 비디오 데이터를 디코딩하기 위한 엔트로피 디코더;
상기 잔상 비디오 데이터를 역양자화하기 위한 역양자화기;
상기 잔상 비디오 데이터를 역변환하고, 상기 잔상 비디오를 상기 예측된 비디오 데이터와 결합하고 상기 결합에 블록해제 필터를 적용하도록 구성된 회로
를 더 포함하는, 비디오 디코딩 장치. - 제14항에 있어서,
상기 블록해제 필터는 변환에 의해 도입된 효과를 제거 또는 감소시키는, 비디오 디코딩 장치. - 제10항 또는 제11항에 있어서,
상기 크로미넌스 구성요소 타입은 서브샘플링되지 않는, 비디오 디코딩 장치. - 제10항 또는 제11항에 있어서,
상기 예측 방향이 수평으로 검출되면 필터링 회로가 샘플들의 상기 상부 행을 필터링하는, 비디오 디코딩 장치. - 제10항 또는 제11항에 있어서,
상기 예측 방향이 수직이면 샘플들의 상기 좌측 열을 필터링하는 것을 포함하는, 비디오 디코딩 장치. - 제10항 또는 제11항의 비디오 디코딩 장치를 포함하는 비디오 캡처 디바이스로서, 캡처되고 디코딩된 비디오 데이터가 출력되는 디스플레이를 더 포함하는 비디오 캡처 디바이스.
- 제10항 또는 제11항에 따른 비디오 디코딩 장치를 포함하는 비디오 수신 디바이스.
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