Journal Article
비트 스트림 지도를 이용한 고해상도 영상의 효율적인 지역복호화
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Authors
박성원, 원종우, 이선영, 김욱중, 김규헌, 장의선
Issue Date
2004-12
Citation
방송공학회논문지, v.9, no.4, pp.391-401
ISSN
1226-7953
Publisher
한국방송공학회 (KOSBE)
Language
Korean
Type
Journal Article
Abstract
본 논문은 고해상도 영상 서비스를 위하여 부분 영상의 공간임의접근 (Spatial Random Acess) 을 효과적으로 구현하기 위하여 비트 스트림 지도 (B-map)를 이용한 부호화 방법을 제안한다 . 다양한 환경에서, TV 브라운관, 모니터, PDA용 LCD와 같은 표준 디원하지 못하는 실정이다. 따라서 사용자는 다운샘플링된 저해상도의 영상이나 디스플레이의 크기에 맞춰진 부분 영상만을 볼 수밖에 없다 . 제안한 B-map은 부호화 과정에서 생성된 비트 스트림에 대한 블록 단위의 배열 정보를 가지고 있으며 , 복호 시 해당 영상의 비트 스트림보다 앞서 보내져 참조됨으로써 효과적인 지역 복호 (Local decoding)를 가능하게 한다. B-map을 이용한 방식은 타일링을 비롯한 비교 대안들에 비해 효율적인 지역 복호화를 구현할 수 있음을 실험을 통해 확인하였다 .
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