KR20160129814A - 색차 성분 양자화 매개 변수 결정 방법 및 이러한 방법을 사용하는 장치 - Google Patents
색차 성분 양자화 매개 변수 결정 방법 및 이러한 방법을 사용하는 장치 Download PDFInfo
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Abstract
Description
도 2는 본 발명의 또 다른 실시예에 따른 영상 복호화 장치의 구성을 나타내는 블록도이다.
도 3은 본 발명의 실시예에 따른 색차 성분 양자화 매개 변수를 결정하기 위한 영상 부호화 방법을 나타낸 순서도이다.
도 4는 본 발명의 실시예에 따른 색차 성분 양자화 매개 변수를 결정하기 위한 영상 복호화 방법을 나타낸 순서도이다.
도 5는 본 발명의 실시예에 따른 색차 성분 양자화 매개 변수를 결정하기 위한 영상 부호화 방법을 나타낸 순서도이다.
도 6은 본 발명의 실시예에 따른 색차 성분 양자화 매개 변수를 결정하기 위한 영상 복호화 방법을 나타낸 순서도이다.
도 7은 본 발명의 실시예에 따른 영상 부호화기의 일부를 나타낸 개념도이다.
도 8은 본 발명의 실시예에 따른 영상 부호화기의 일부를 나타낸 개념도이다.
도 9는 본 발명의 실시예에 따른 영상 복호화기의 일부를 나타낸 개념도이다.
도 10은 본 발명의 실시예에 따른 영상 복호화기의 일부를 나타낸 개념도이다.
Claims (4)
- 동일한 색차 성분 양자화 매개 변수가 적용되는 복수 개의 변환 블록들의 집합인 양자화 그룹을 특정하고, 상기 특정된 양자화 그룹에 적용되는 색차 성분 양자화 매개 변수를 산출하며, 상기 산출된 색차 성분 양자화 매개 변수를 이용하여 상기 양자화 그룹에 포함된 변환 블록의 변환 계수를 역양자화하는 역양자화부; 상기 양자화 그룹은 제1 크기의 변환 블록들과 제2 크기의 변환 블록들로 구성됨, 및
상기 역양자화된 변환 계수를 역변환하여 잔차 블록을 생성하는 역변환부;를 포함하되,
상기 역양자화부는,
색차 성분 양자화 매개 변수 오프셋을 이용하여 색차 성분 양자화 매개 변수 인덱스를 산출하는 색차 성분 양자화 매개 변수 인덱스 산출부; 여기서, 상기 색차 성분 양자화 매개 변수 오프셋은 제1 색차 성분(Cb 성분)과 제2 색차 성분(Cr 성분) 각각에 대해서 시그널링됨, 및
상기 색차 성분 양자화 매개 변수 인덱스를 기초로 상기 색차 성분 양자화 매개 변수를 산출하는 색차 성분 양자화 매개 변수 산출부를 포함하는 것을 특징으로 하는 영상 복호화 장치. - 제1항에 있어서, 상기 양자화 그룹은 8x8 크기의 변환 블록들과 16x16 크기의 변환 블록들 구성되는 것을 특징으로 하는 영상 복호화 장치.
- 제1항에 있어서, 상기 색차 성분 양자화 매개 변수 산출부는,
상기 색차 성분 양자화 매개 변수 인덱스와 영상 복호화 장치에 기-정의된 매핑 테이블을 이용하여 상기 색차 성분 양자화 매개 변수를 산출하는 것을 특징으로 하는 영상 복호화 장치. - 제3항에 있어서, 상기 기-정의된 매핑 테이블은 상기 색차 성분 양자화 매개 변수 인덱스와 상기 색차 성분 양자화 매개 변수 간의 매핑 관계를 정의한 것을 특징으로 하는 영상 복호화 장치.
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