KR100929078B1 - 코딩 왜곡 제거 방법 - Google Patents
코딩 왜곡 제거 방법 Download PDFInfo
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Abstract
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Claims (15)
- 필드 구조 블록과 프레임 구조 블록으로 이루어지는 화상에서 코딩 왜곡을 제거하기 위한 코딩 왜곡 제거 방법에 있어서, 상기 방법은코딩 왜곡을 제거하는 대상 블록이, 필드 구조 블록 또는 프레임 구조 블록 중 어느 것으로 코딩되었는지를 검출하는 단계와,상기 대상 블록이 필드 구조 블록으로서 코딩된 것으로 검출되었을 경우, 상기 대상 블록의 짝수 필드 화소에 대해 코딩 왜곡 제거 처리를 실행하고, 또한 개별적으로 상기 대상 블록의 홀수 필드 화소에 대해 코딩 왜곡 제거 처리를 실행하는 단계와,상기 대상 블록이 프레임 구조 블록으로서 코딩된 것으로 검출되었을 경우, 상기 대상 블록의 짝수 필드 화소와 홀수 필드 화소를 구분하지 않고, 상기 대상 블록에 대해 코딩 왜곡 제거 처리를 실행하는 단계를 포함하며,상기 코딩 왜곡 제거 처리는, 코딩 왜곡 제거가 필요한지의 여부를 결정하는 단계와, 처리될 화소의 수를 결정하는 단계와, 코딩 왜곡을 제거하는 단계를 포함하고,처리될 화소의 수는 블록 경계로부터 계수(count)된 화소의 수이고, 또한, 처리될 화소의 수는 블록 경계에 인접한 화소간의 화소값의 차(difference)에 근거하여 결정되는 것을 특징으로 하는 코딩 왜곡 제거 방법.
- 필드 구조 블록과 프레임 구조 블록으로 이루어지는 화상에서 코딩 왜곡을 제거하기 위한 코딩 왜곡 제거 방법에 있어서, 상기 방법은코딩 왜곡을 제거하는 대상 블록이, 프레임 구조 블록에 인접한 필드 구조 블록인지를 검출하는 단계와,필드 구조 블록과 프레임 구조 블록에 대해 코딩 왜곡 제거 처리를 실행하는 단계를 포함하며,상기 코딩 왜곡 제거 처리는, 필드 구조 블록과 프레임 구조 블록 둘 다의 짝수 필드에 대해 처리될 화소의 수와 더불어, 필드 구조 블록과 프레임 구조 블록 둘 다의 홀수 필드에 대해 처리될 화소의 수를 결정하는 단계를 포함하는 것을 특징으로 하는 코딩 왜곡 제거 방법.
- 청구항 2에 있어서,상기 짝수 필드에 대해 처리할 화소의 수는, 상기 홀수 필드에 대해 처리할 화소의 수와는 독립적으로 결정되는 것을 특징으로 하는 코딩 왜곡 제거 방법.
- 청구항 1에 있어서,상기 블록 경계가 필드 구조 블록과 프레임 구조 블록 사이의 경계일 경우, 상기 필드 구조 블록과 상기 프레임 구조 블록 둘 다의 짝수 필드에 대해 처리될 화소의 수는, 상기 필드 구조 블록과 상기 프레임 구조 블록 둘 다의 홀수 필드에 대해 처리될 화소의 수와는 독립적으로 결정되는 것을 특징으로 하는 코딩 왜곡 제거 방법.
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PCT/JP2002/012488 WO2003047267A1 (en) | 2001-11-29 | 2002-11-29 | Coding distortion removal method, moving picture coding method, moving picture decoding method, and apparatus for realizing the same, program |
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