KR20190077110A - 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 (26)
- 공간 주파수 데이터의 블록의 정규화된 주파수-변환으로부터 발생하는 비디오 데이터 샘플들에 대해, 공통 스케일링 인자에 의해 각각 스케일링되는 비디오 데이터 샘플들의 블록들을 생성하기 위해 주파수 변환을 적용하여 주파수-변환을 수행하고, 양자화 단계 크기에 따라 역양자화(dequantize)하도록, 공간 주파수 데이터의 블록들에 관하여 동작가능한 비디오 디코딩 장치로서,
상기 비디오 디코딩 장치에 의해 처리되는 데이터를 인자 2n(n은 정수)으로 나누기 위해 n-비트 시프트를 적용하도록 구성되는 시프트기(shifter);
상기 공통 스케일링 인자를 2n으로 나눈 것인, 잔상 스케일링 인자를 검출하도록 구성되는 검출기;
변경된 양자화 단계 크기를 생성하기 위해 상기 잔상 스케일링 인자에 따라 상기 양자화 단계 크기를 변경하도록 구성되는 데이터 변경기(data modifier);
역양자화를 위한 각 데이터 샘플에 상기 변경된 양자화 단계 크기에 따른 값을 곱하도록 구성되는 곱셈기; 및
상기 주파수 변환을 적용하기 위한 주파수-변환기
를 포함하는 비디오 디코딩 장치. - 제1항에 있어서,
양자화 단계 크기들의 표에서 각각의 엔트리를 정의하는 양자화 색인을 선택하기 위한 선택기를 더 포함하는 비디오 디코딩 장치. - 제2항에 있어서,
상기 데이터 변경기는, 본래 선택된(originally selected) 양자화 단계 크기에 대한 상이한 양자화 단계 크기의 비가 상기 잔상 스케일링 인자와 동일해지도록 상기 상이한 양자화 단계 크기를 선택하기 위해서, 상기 양자화 색인을 변경하도록 구성되는, 비디오 디코딩 장치. - 제3항에 있어서,
상기 선택기는, 휘도 샘플들에 대하여 상기 양자화 색인을 선택하고, 각각의 또는 두 크로미넌스 구성요소들의 샘플들에 대한, 상기 휘도 샘플들에 대해 선택된 상기 양자화 색인과 관련된, 양자화 색인 오프셋을 생성하도록 구성되고,
상기 데이터 변경기는 상기 잔상 스케일링 인자에 따라 상기 양자화 색인 오프셋을 변경하도록 구성되는, 비디오 디코딩 장치. - 제2항 내지 제4항 중 어느 한 항에 있어서,
상기 표에서 상기 양자화 단계 크기들의 연속적인 값들은 대수적으로 연관되어, 정수인 m의 양자화 색인에서의 변화가 1을 초과하는 정수인 인자 p 만큼의 양자화 단계 크기의 변화를 나타내는, 비디오 디코딩 장치. - 제5항에 있어서,
m = 6이고, p = 2인, 비디오 디코딩 장치. - 제6항에 있어서,
상기 데이터 변경기는 상기 양자화 색인을 +/-3 만큼 변경하도록 구성되는, 비디오 디코딩 장치. - 제6항에 있어서,
상기 양자화 색인("색인")은 1.5m 엔트리들을 포함하는 하나 이상의 표에 의해 양자화 단계(scaledQStep) 및 이것의 역방향 양자화 단계(inverseQStep)와 연관되는, 비디오 디코딩 장치. - 제8항에 있어서,
상기 표는 양자화 단계(scaledQStep) 및 이것의 역방향 양자화 단계(inverseQStep)와 각각 연관된 9개의 양자화 색인 값들을 포함하는, 비디오 디코딩 장치. - 제1항 내지 제4항 중 어느 한 항에 있어서,
상기 비디오 디코딩 장치는 2n이 상기 공통 스케일링 인자보다 크거나 같도록 n을 선택하도록 구성되는, 비디오 디코딩 장치. - 제1항 내지 제4항 중 어느 한 항에 있어서,
상기 비디오 디코딩 장치는 2n이 상기 공통 스케일링 인자보다 작거나 같도록 n을 선택하도록 구성되는, 비디오 디코딩 장치. - 제1항에 있어서,
상기 데이터 변경기는 상기 양자화 단계 크기에 상기 잔상 스케일링 인자에 따른 인자를 곱하도록 구성되는, 비디오 디코딩 장치. - 제1항 내지 제4항 및 제14항 중 어느 한 항에 있어서,
상기 비디오 데이터 샘플들의 블록들 중 적어도 일부는 MxN 샘플들을 포함하고,
N/M의 제곱근은 2의 정수 거듭제곱과 같지 않는, 비디오 디코딩 장치. - 제15항에 있어서,
상기 비디오 데이터 샘플들의 블록들 중 적어도 일부는 크로미넌스 샘플들의 블록들인, 비디오 디코딩 장치. - 제16항에 있어서,
상기 비디오 데이터 샘플들은 4:2:2 포맷인, 비디오 디코딩 장치. - 제1항 내지 제4항 및 제14항 중 어느 한 항에 있어서,
상기 주파수 변환기는 변환 행렬 및 상기 변환 행렬의 전이에 의해 공간 주파수 데이터의 블록을 행렬-곱셈하도록 구성되고,
상기 변환 행렬은, 정규화된 변환 행렬의 각각의 값들에 관하여 상기 공통 스케일링 인자만큼 각각이 스케일링된 정수 값들의 어레이를 포함하는, 비디오 디코딩 장치. - 제18항에 있어서,
상기 변환 행렬은, 상기 변환 행렬의 차원에 따른 양만큼 정규화된 변환 행렬의 각각의 값들에 대하여 각각이 스케일링된 정수 값들의 어레이를 포함하는, 비디오 디코딩 장치. - 제1항 내지 제4항 및 제14항 중 어느 한 항에 있어서,
역양자화하는 것은 역양자화된 공간 주파수 데이터의 블록들을 생성하기 위해 양자화된 공간 주파수 데이터의 블록들에 관하여 동작하도록 구성되고,
상기 주파수-변환기는 비디오 데이터 샘플들의 블록들을 생성하기 위해 역양자화된 공간 주파수 데이터의 블록들에 관하여 동작하도록 구성되는, 비디오 디코딩 장치. - 비디오 데이터 샘플들의 블록들에 주파수-변환을 수행하여 공간 주파수 데이터의 블록들을 생성하고, 선택된 양자화 단계 크기에 따라 양자화하도록 동작가능한 비디오 코딩 장치로서,
비디오 데이터 샘플들의 블록의 정규화된 주파수-변환으로부터 발생하는 공간 주파수 계수들에 관해, 공통 스케일링 인자에 의해 각각 스케일링되는 상기 공간 주파수 계수들의 블록을 생성하기 위해 비디오 데이터 샘플들의 블록을 주파수-변환하도록 구성되는 주파수-변환기;
양자화를 위한 양자화 단계 크기를 선택하도록 구성되는 선택기;
인자 2n(n은 정수)으로 나누기 위해 n-비트 시프트를 적용하도록 구성되는 시프트기;
상기 공통 스케일링 인자를 2n으로 나눈 것인, 잔상 스케일링 인자를 검출하도록 구성되는 검출기;
변경된 양자화 단계 크기를 생성하기 위해 상기 잔상 스케일링 인자에 따라 상기 양자화 단계 크기를 변경하도록 구성되는 데이터 변경기; 및
상기 변경된 양자화 단계 크기에 따른 값으로 양자화를 위한 각 데이터 값을 나누고, 그 결과를 정수 값으로 반올림하도록 구성되는 디바이더(divider)
를 포함하는 비디오 코딩 장치. - 공간 주파수 데이터의 블록의 정규화된 주파수-변환으로부터 발생하는 비디오 데이터 샘플들에 대해, 공통 스케일링 인자에 의해 각각 스케일링되는 비디오 데이터 샘플들의 블록들을 생성하기 위해 주파수 변환을 적용하여 주파수-변환을 수행하고, 양자화 단계 크기에 따라 역양자화하도록, 공간 주파수 데이터의 블록들에 관하여 동작가능한 비디오 디코딩 방법으로서,
처리되는 데이터를 인자 2n(n은 정수)으로 나누기 위해 n-비트 시프트를 적용하는 단계;
상기 공통 스케일링 인자를 2n으로 나눈 것인, 잔상 스케일링 인자를 검출하는 단계;
변경된 양자화 단계 크기를 생성하기 위해 상기 잔상 스케일링 인자에 따라 상기 양자화 단계 크기를 변경하는 단계;
역양자화를 위한 데이터 샘플들의 각각에 상기 변경된 양자화 단계 크기에 따른 값을 곱하는 단계; 및
주파수-변환을 적용하는 단계
를 포함하는 비디오 디코딩 방법. - 비디오 데이터 샘플들의 블록의 정규화된 주파수-변환으로부터 발생하는 공간 주파수 계수들에 대해, 공통 스케일링 인자에 의해 각각 스케일링되는 상기 공간 주파수 계수들을 생성하기 위해 비디오 데이터 샘플들의 블록들에 주파수-변환을 수행하여 공간 주파수 데이터의 블록들을 생성하고, 선택된 양자화 단계 크기에 따라 양자화하도록 동작가능한 비디오 코딩 방법으로서,
비디오 데이터 샘플들의 블록을 주파수-변환하는 단계;
양자화를 위한 양자화 단계 크기를 선택하는 단계;
인자 2n(n은 정수)으로 나누기 위해 n-비트 시프트를 적용하는 단계;
상기 공통 스케일링 인자를 2n으로 나눈 것인, 잔상 스케일링 인자를 검출하는 단계;
변경된 양자화 단계 크기를 생성하기 위해 상기 잔상 스케일링 인자에 따라 상기 양자화 단계 크기를 변경하는 단계; 및
상기 변경된 양자화 단계 크기에 따른 값으로 양자화를 위한 데이터 값들의 각각을 나누고 그 결과를 정수 값으로 반올림하는 단계
를 포함하는 비디오 코딩 방법. - 컴퓨터에 의해 실행될 때, 상기 컴퓨터로 하여금 제22항 또는 제23항에 따른 방법을 수행하도록 하는 소프트웨어를 저장하는 기계-판독가능 비일시적 저장 매체.
- 제1항 내지 제4항 및 제14항 중 어느 한 항에 따른 비디오 디코딩 장치를 포함하는 비디오 수신 장치.
- 이미지 센서, 비디오 인코더, 디스플레이 및 제1항 내지 제4항 및 제14항 중 어느 한 항에 따른 비디오 디코딩 장치를 포함하는 비디오 캡처 장치로서,
디코딩된 비디오 신호들이 상기 디스플레이에 의해 출력되는, 비디오 캡처 장치.
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| GB1207459.7 | 2012-04-26 | ||
| GB1211067.2A GB2501547A (en) | 2012-04-26 | 2012-06-22 | Filtering Predicted Chrominance Samples When Encoding 4:2:2 Format Video Using HEVC |
| GB1211067.2 | 2012-06-22 | ||
| GB1220836.9 | 2012-11-19 | ||
| GB1220836.9A GB2501566A (en) | 2012-04-26 | 2012-11-19 | Filtering Predicted Chrominance Samples When Encoding 4:2:2 Format Video Using HEVC |
| PCT/GB2013/051073 WO2013160696A1 (en) | 2012-04-26 | 2013-04-26 | Filtering of prediction units according to intra prediction direction |
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