KR20160106022A - 동영상 부호화 장치 - Google Patents
동영상 부호화 장치 Download PDFInfo
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Abstract
Description
도 2는 본 발명에 따른 동영상 부호화 장치를 나타내는 블록도이다.
도 3은 본 발명에 따른 동영상 복호화 장치를 나타내는 블록도이다.
도 4는 본 발명에 따른 공간 스킵 후보자의 위치를 나타내는 도면이다.
도 5는 본 발명에 따른 시간 스킵 후보자 픽쳐 내의 현재 예측 유닛에 대응하는 대응 블록들을 나타내는 도면이다.
도 6은 본 발명에 따른 공간 움직임 벡터 후보자를 구하기 위해 사용되는 현재 예측 유닛에 인접한 예측 유닛들의 위치를 나타내는 도면이다.
Claims (2)
- 각 코딩 블록의 크기와 예측 모드를 결정하는 픽쳐 분할부;
현재 블록이 인터 예측 부호화되는 경우에, 상기 현재 블록의 참조 픽쳐와 움직임 벡터를 결정하고, 상기 현재 블록의 움직임 벡터를 기초로 상기 참조 픽쳐로부터 상기 현재 블록에 대응하는 예측 블록을 추출하는 인터 예측부;
상기 현재 블록이 인트라 예측 부호화되는 경우에, 상기 현재 블록의 인트라 예측 모드를 결정하고, 상기 인트라 예측 모드에 따라 상기 현재 블록에 대응하는 예측 블록을 생성하는 인트라 예측부;
상기 현재 블록과 상기 예측 블록의 차이를 계산하여 얻어진 잔차 블록을 변환하여 변환 블록을 생성하는 변환부;
현재 코딩 블록에 대해 양자화 스텝 사이를 결정하고, 상기 양자화 스텝 사이즈 및 예측 모드에 따라 결정되는 양자화 매트릭스를 이용하여 상기 변환 블록을 양자화하여 양자화 변환 블록을 생성하는 양자화부;
상기 양자화 변환 블록의 양자화 변환 계수들을 스캐닝하여 1차원의 양자화 계수 시퀀스를 생성하는 스캐닝부; 및
상기 1차원의 양자화 계수 시퀀스를 엔트로피 부호화하는 엔트로피 부호화부;를 포함하고,
상기 인터 예측부는 상기 현재 블록이 속하는 픽쳐 내에서 상기 현재 블록에 인접하는 이웃 블록들의 움직임 벡터 중에서 유효한 움직임 벡터를 공간 움직임 벡터 후보자로 결정하고, 상기 현재 블록이 속하는 픽쳐와 상이한 픽쳐인 시간 움직임 벡터 후보자 픽쳐 내에서 상기 현재 블록에 대응하는 위치에 존재하는 블록의 움직임 벡터를 시간 움직임 벡터 후보자로 결정하고, 상기 공간 움직임 벡터 후보자와 상기 시간 움직임 벡터 후보자 중에서 상기 현재 블록의 움직임 벡터 후보자를 결정하고, 상기 현재 블록의 움직임 벡터와 상기 현재 블록의 움직임 벡터 후보자의 차이값을 부호화하며,
상기 시간 움직임 벡터 후보자는 상기 시간 움직임 벡터 후보자 픽쳐에 존재하는 두 개의 블록 중에서 첫 번째 유효한 블록의 움직임 벡터이며,
상기 두 개의 블록은 제1후보 블록과 제2후보 블록을 포함하고, 상기 제1후보 블록은 상기 시간 움직임 벡터 후보자 픽쳐 내에서 상기 현재 블록과 동일한 위치의 대응 블록에 인접한 우하 코너 블록 또는 상기 시간 움직임 벡터 후보자 픽쳐 내에서 상기 현재 블록과 동일한 위치의 대응 블록에 인접한 우하 블록이고, 상기 제2후보 블록은 상기 대응 블록의 중앙 위치를 기준으로 좌상에 인접하는 픽셀을 포함하는 제1센터 블록 또는 상기 대응 블록의 중앙 위치를 기준으로 우하에 인접하는 픽셀을 포함하는 제2센터 블록이고,
상기 변환 블록의 크기가 4x4보다 크면, 상기 양자화 변환 블록의 양자화 변환 계수들은 복수 개의 서브셋들로 분할되고,
상기 현재 블록이 인트라 예측 부호화되는 경우에, 상기 스캐닝부는 상기 현재 블록의 인트라 예측 모드에 따라 결정되는 제1스캔 패턴을 이용하여 상기 복수 개의 서브셋들을 스캔하고, 상기 현재 블록의 인트라 예측 모드에 따라 결정되는 제2스캔 패턴을 이용하여 상기 각각의 서브셋 내의 양자화 변환 계수들을 스캔하며, 상기 제1스캔 패턴과 상기 제2스캔 패턴은 동일하고,
상기 예측 블록이 머지 모드로 부호화되는 경우에, 상기 인터 예측부는 상기 현재 블록이 속하는 픽쳐 내에서 상기 현재 블록에 인접하는 이웃 블록들의 움직임 벡터 중에서 유효한 움직임 벡터를 공간 머지 후보자로 결정하고, 상기 현재 블록이 속하는 픽쳐와 상이한 픽쳐인 시간 움직임 벡터 후보자 픽쳐 내에서 상기 현재 블록에 대응하는 위치에 존재하는 블록의 움직임 벡터를 시간 머지 후보자로 결정하고, 상기 공간 머지 후보자와 상기 시간 머지 후보자 중에서 상기 현재 블록의 움직임 벡터 후보자를 결정하고, 상기 현재 블록의 움직임 벡터와 상기 현재 블록의 움직임 벡터 후보자의 차이값을 부호화하며,
상기 시간 머지 후보자는 움직임 벡터와 참조 픽쳐 인덱스를 포함하고, 상기 시간 머지 후보자의 참조 픽쳐 인덱스는 0으로 설정되는 것을 특징으로 하는 동영상 부호화 장치. - 제1항에 있어서,
상기 스캐닝부는 상기 복수 개의 서브셋들과 상기 각각의 서브셋 내의 양자화 변환 계수들을 역방향으로 스캔하는 것을 특징으로 하는 동영상 부호화 방법.
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