KR20200008068A - 이미지들을 인코딩 및 디코딩하기 위한 방법,인코딩 및 디코딩 디바이스,및 대응하는 컴퓨터 프로그램들 - Google Patents
이미지들을 인코딩 및 디코딩하기 위한 방법,인코딩 및 디코딩 디바이스,및 대응하는 컴퓨터 프로그램들 Download PDFInfo
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Abstract
Description
도 1은 본 발명에 따른 코딩 방법의 일반 단계들을 표현한다.
도 2는 도 1의 코딩 방법의 단계들을 수행할 수 있는, 본 발명에 따른 코딩 디바이스를 표현한다.
도 3은 본 발명에 따른 코딩 방법의 특정 실시예를 표현한다.
도 4는 본 발명에 따른 코딩 디바이스의 특정 실시예를 표현한다.
도 5는 본 발명에 따른 디코딩 방법의 일반 단계들을 표현한다.
도 6은 도 5의 디코딩 방법의 단계들을 수행할 수 있는, 본 발명에 따른 디코딩 디바이스를 표현한다.
도 7은 본 발명에 따른 디코딩 방법의 특정 실시예를 표현한다.
도 8은 본 발명에 따른 디코딩 디바이스의 특정 실시예를 표현한다.
Claims (4)
- 이미지의 사인 데이터 감춤 인에이블된 분할(sign-data-hiding enabled partition)을 디코딩하기 위한 컴퓨터 구현(computer-implemented) 방법으로,
역변환(inverse transform) 타입을 특정하는 정보를 수신하는 단계;
사인 데이터 감춤 인에이블된 분할의 잔여 블록을 나타내는 계수들의 세트를 엔트로피 디코딩하는 단계; 및
상기 계수들의 세트 내의 수정 가능한(modifiable) 계수들의 개수(count)가 임계치보다 큰 지 여부를 결정하는 단계 - 상기 계수들의 세트 내의 수정 가능한 계수들은 상기 계수들의 세트 내의 첫 번째 넌-제로 계수, 상기 계수들의 세트 내의 마지막 넌-제로 계수, 및 상기 계수들의 세트 내의 상기 첫 번째 넌-제로 계수와 상기 마지막 넌-제로 계수 사이의 계수들을 포함함 - 를 포함하고,
상기 계수들의 세트 내의 수정 가능한 계수들의 개수가 상기 임계치보다 크지 않은 경우, 상기 첫 번째 넌-제로 계수의 사인이 감춰지지 않고,
상기 계수들의 세트 내의 수정 가능한 계수들의 개수가 상기 임계치보다 큰 경우, 상기 첫 번째 넌-제로 계수의 사인이 감춰지며, 또한 아래의 단계들이 수행되어 상기 첫 번째 넌-제로 계수의 사인을 결정하고,
상기 단계들은,
상기 계수들의 세트 내의 넌-제로 계수들의 절대값들의 합을 계산하는 단계;
상기 넌-제로 계수들의 절대값들의 합을 사용하여 패리티 데이터를 계산하는 단계;
상기 패리티 데이터에 기초하여 상기 첫 번째 넌-제로 계수에 대한 사인을 지정하는 단계;
사인 지정된 상기 첫 번째 넌-제로 계수를 포함하는 상기 계수들의 세트를 역양자화(dequantize)하여 역양자화된 계수들의 세트를 생성하는 단계;
상기 역변환 타입을 특정하는 정보에 따라 상기 역양자화된 계수들의 세트를 역변환하는 단계;
예측 타입을 표시하는 구문 엘리먼트(syntax element)에 따라 상기 사인 데이터 감춤 인에이블된 분할의 잔여 블록에 대응하는 블록을 예측 디코딩하는 단계; 및
역 잔여 블록(inverse residual block) 및 예측 디코딩된 블록을 부가함에 기초하여 상기 이미지의 블록을 재구성하는 단계
를 포함하는 것인, 컴퓨터 구현 방법. - 제1항에 있어서,
상기 임계치는 4인 것인, 컴퓨터 구현 방법. - 이미지의 사인 데이터 감춤 인에이블된 블록을 나타내는 이미지 데이터를 저장하기 위한 비일시적 컴퓨터 판독가능 저장 장치(non-transitory computer-readable storage)로서,
사인 데이터 감춤 인에이블된 블록에 적용될 예측 타입을 표시하는 구문 엘리먼트;
역변환 타입을 표시하는 구문 엘리먼트; 및
상기 사인 데이터 감춤 인에이블된 블록에 대한 잔여 블록을 나타내는 엔트로피-인코딩된 양자화된 변환 계수들의 세트를 포함하고,
상기 엔트로피-인코딩된 양자화된 변환 계수들의 세트는 첫 번째 넌-제로 엔트로피-인코딩된 양자화된 변환 계수를 포함하고,
수정 가능한 계수는 상기 첫 번째 넌-제로 엔트로피-인코딩된 양자화된 변환 계수와 마지막 넌-제로 엔트로피-인코딩된 양자화된 변환 계수를 포함하는 상기 첫 번째 넌-제로 엔트로피-인코딩된 양자화된 변환 계수와 상기 마지막 넌-제로 엔트로피-인코딩된 양자화된 변환 계수 사이의 엔트로피-인코딩된 양자화된 변환 계수이고,
상기 엔트로피-인코딩된 양자화된 변환 계수들의 세트 내의 수정 가능한 계수들의 개수가 임계치보다 크지 않은 경우, 상기 첫 번째 넌-제로 엔트로피-인코딩된 양자화된 변환 계수의 사인이 감춰지지 않으며, 또한 엔트로피컬하게 인코딩되고,
상기 엔트로피-인코딩된 양자화된 변환 계수들의 세트 내의 수정 가능한 계수들의 개수가 상기 임계치보다 큰 경우, 상기 첫 번째 넌-제로 엔트로피-인코딩된 양자화된 변환 계수의 사인이 감춰지며,
상기 엔트로피-인코딩된 양자화된 변환 계수들의 세트 내의 수정 가능한 계수들의 절대값들의 합의 패리티는 사인 지정이 없는 상기 첫 번째 넌-제로 엔트로피-인코딩된 양자화된 변환 계수의 사인을 표시하고,
이미지의 블록은 예측된 블록 - 상기 예측 타입을 표시하는 구문 엘리먼트에 따라 예측됨 - 과 상기 잔여 블록을 부가함으로써 재구성되는 것인, 비일시적 컴퓨터 판독가능 저장 장치. - 제3항에 있어서,
상기 임계치는 4인 것인, 비일시적 컴퓨터 판독가능 저장 장치.
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Application Number | Priority Date | Filing Date | Title |
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FR1160114 | 2011-11-07 | ||
FR1160114A FR2982446A1 (fr) | 2011-11-07 | 2011-11-07 | Procede de codage et decodage d'images, dispositif de codage et decodage et programmes d'ordinateur correspondants |
PCT/FR2012/052551 WO2013068683A1 (fr) | 2011-11-07 | 2012-11-06 | Procédé de codage et décodage d'images, dispositif de codage et décodage et programmes d'ordinateur correspondants |
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KR1020197014590A Division KR102069357B1 (ko) | 2011-11-07 | 2012-11-06 | 이미지들을 인코딩 및 디코딩하기 위한 방법,인코딩 및 디코딩 디바이스,및 대응하는 컴퓨터 프로그램들 |
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