KR100945826B1 - 화상 정보 복호 방법 및 장치 - Google Patents
화상 정보 복호 방법 및 장치 Download PDFInfo
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- KR100945826B1 KR100945826B1 KR1020097021914A KR20097021914A KR100945826B1 KR 100945826 B1 KR100945826 B1 KR 100945826B1 KR 1020097021914 A KR1020097021914 A KR 1020097021914A KR 20097021914 A KR20097021914 A KR 20097021914A KR 100945826 B1 KR100945826 B1 KR 100945826B1
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Abstract
Description
Claims (8)
- 휘도 성분과 색차 성분을 가지는 입력 화상 신호를 블록화하고, 블록 단위로 동작 예측 보상을 실시함으로써 화상 압축 부호화된 부호열에 대하여, 동작 보상을 포함하는 복호 처리를 실행하는 화상 정보 복호 방법에 있어서,상기 동작 예측 보상 시에, 입력 화상 블록의 색차 신호와 참조 화상 블록의 색차 신호의 위상을 일치시키도록, 동작 예측 모드 및 동작 벡터 정보의 수직 성분의 값 mv에 따라, 상기 참조 화상 블록 내의 색차 신호를 위상 시프트하는 것을 특징으로 하는 화상 정보 복호 방법.
- 제1항에 있어서,상기 입력 화상 신호는 4 : 2 : 0 포맷의 비월 조작 화상 신호이며, 상기 동작 예측 모드는 상기 블록을 포함하는 부호화 단위로서의 매크로 블록마다 선택되는 프레임 동작 예측 보상 모드, 필드 동작 예측 보상 모드를 가지는 것을 특징으로 하는 화상 정보 복호 방법.
- 제2항에 있어서,상기 동작 예측 모드가 프레임 동작 예측 보상 모드이며, 동작 벡터 정보의 수직 성분의 값 mv가 정수치인 경우에, 필드 내 보간에 의해 상기 위상 시프트를 실행하고, 상기 동작 벡터 정보의 수직 성분의 값 mv가 4n + 1.0(n은 정수)인 경우 에는 상기 색차 신호를 -1/4 위상 시프트하고, 상기 값 mv가 4n + 2.0(n은 정수)인 경우에는 상기 색차 신호를 -1/2 위상 시프트하고, 상기 값 mv가 4n + 3.0(n은 정수)인 경우에는 상기 색차 신호를 -3/4 위상 시프트하는 것을 특징으로 하는 화상 정보 복호 방법.
- 제2항에 있어서,상기 동작 예측 모드가 필드 동작 예측 보상 모드이며, 1 프레임을 구성하는 제1, 제2 필드에 대하여 참조 화상에서의 필드와, 입력 화상에서의 필드가 동일한 경우에, 상기 동작 벡터 정보의 수직 성분의 값 mv의 1/2만큼 상기 색차 신호를 위상 시프트하고, 참조 화상이 제2 필드이며, 입력 화상이 제1 필드인 경우에, mv/2 -1/4만큼 상기 색차 신호를 위상 시프트하고, 참조 화상이 제1 필드이며, 입력 화상이 제2 필드인 경우에, mv/2 + 1/4만큼 상기 색차 신호를 위상 시프트하는 것을 특징으로 하는 화상 정보 복호 방법.
- 휘도 성분과 색차 성분을 가지는 입력 화상 신호를 블록화하고, 블록 단위로 동작 예측 보상을 실시함으로써 화상 압축 부호화된 부호열에 대하여, 동작 보상을 포함하는 복호 처리를 실행하는 화상 정보 복호 장치에 있어서,상기 동작 예측 보상 시에, 입력 화상 블록의 색차 신호와 참조 화상 블록의 색차 신호의 위상을 일치시키도록, 동작 예측 모드 및 동작 벡터 정보의 수직 성분의 값 mv에 따라, 상기 참조 화상 블록 내의 색차 신호를 위상 시프트하는 위상 보 정 수단을 구비하는 것을 특징으로 하는 화상 정보 복호 장치.
- 제5항에 있어서,상기 입력 화상 신호는 4 : 2 : 0 포맷의 비월 조작 화상 신호이며, 상기 동작 예측 모드는 상기 블록을 포함하는 부호화 단위로서의 매크로 블록마다 선택되는 프레임 동작 예측 보상 모드, 필드 동작 예측 보상 모드를 가지는 것을 특징으로 하는 화상 정보 복호 장치.
- 제6항에 있어서,상기 동작 예측 모드가 프레임 동작 예측 보상 모드이며, 상기 동작 벡터 정보의 수직 성분의 값 mv가 정수치인 경우에, 필드 내 보간에 의해 상기 위상 시프트를 실행하고, 상기 동작 벡터 정보의 수직 성분의 값 mv가 4n + 1.0(n은 정수)인 경우에는 상기 색차 신호를 -1/4 위상 시프트하고, 상기 값 mv가 4n + 2.0(n은 정수)인 경우에는 상기 색차 신호를 -1/2 위상 시프트하고, 상기 값 mv가 4n + 3.0(n은 정수)인 경우에는 상기 색차 신호를 -3/4 위상 시프트하는 것을 특징으로 하는 화상 정보 복호 장치.
- 제6항에 있어서,상기 동작 예측 모드가 필드 동작 예측 보상 모드이며, 1 프레임을 구성하는 제1, 제2 필드에 대하여 참조 화상에서의 필드와, 입력 화상에서의 필드가 동일한 경우에, 상기 동작 벡터 정보의 수직 성분의 값 mv의 1/2만큼 상기 색차 신호를 위상 시프트하고, 참조 화상이 제2 필드이며, 입력 화상이 제1 필드인 경우에, mv/2 -1/4만큼 상기 색차 신호를 위상 시프트하고, 참조 화상이 제1 필드이며, 입력 화상이 제2 필드인 경우에, mv/2 + 1/4만큼 상기 색차 신호를 위상 시프트하는 것을 특징으로 하는 화상 정보 복호 장치.
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JP2001367867A JP3797209B2 (ja) | 2001-11-30 | 2001-11-30 | 画像情報符号化方法及び装置、画像情報復号方法及び装置、並びにプログラム |
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US (15) | US7639742B2 (ko) |
EP (9) | EP2348738A3 (ko) |
JP (1) | JP3797209B2 (ko) |
KR (2) | KR100942475B1 (ko) |
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JP3797209B2 (ja) | 2001-11-30 | 2006-07-12 | ソニー株式会社 | 画像情報符号化方法及び装置、画像情報復号方法及び装置、並びにプログラム |
US7620254B2 (en) * | 2003-08-07 | 2009-11-17 | Trident Microsystems (Far East) Ltd. | Apparatus and method for motion-vector-aided interpolation of a pixel of an intermediate image of an image sequence |
JP4145275B2 (ja) * | 2004-07-27 | 2008-09-03 | 富士通株式会社 | 動きベクトル検出・補償装置 |
US7970219B2 (en) | 2004-12-30 | 2011-06-28 | Samsung Electronics Co., Ltd. | Color image encoding and decoding method and apparatus using a correlation between chrominance components |
CN101867820B (zh) * | 2005-09-20 | 2013-05-29 | 三菱电机株式会社 | 图像解码装置以及图像解码方法 |
US8194744B2 (en) * | 2006-09-20 | 2012-06-05 | Lsi Corporation | Method and/or apparatus for implementing reduced bandwidth high performance VC1 intensity compensation |
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