한국통신학회논문지 B : 네트워크 및 융합 서비스, v.29, no.12C, pp.1677-1685
ISSN
1226-4717
Publisher
한국통신학회 (KICS)
Language
Korean
Type
Journal Article
Abstract
최근에 FD(Frame Dropping)-CD(Coefficient Dropping) 트랜스코딩기법은 계산량을 줄이고, 손쉽게 구현할 수 있다는 측면에서 주목을 받고 있다. 그러나, 기존의 기법에서는 CD로 인하여 발생되는 왜곡 특성이 GOP내의 부호화 의존성을 갖는 프레임의 복호화 영상 품질에 전파 및 누적되는 성질을 고려하고 있지 않다. 본 논문에서는 CD로 인하여 발생되는 왜곡을 수식적으로 분석하고, CD왜곡이 전파/누적됨을 모의실험을 통하여 분석한다. 또한, 실험적인 결과에 기초하여, CD에 의한 전파/누적 왜곡 특성을 지수 감소함수 형태로 모델링한다. 모의실험을 통하여, 제안된 모델은 CD로 인해 초래되는 전체 누적왜곡 크기를 잘 예측할 수 있음을 보인다.
KSP Keywords
Frame dropping
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