The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Robust Scalable Video Transmission using Adaptive Multiple Reference Motion Compensated Prediction

적응 다중 참조 이동 보상을 이용한 에러에 강인한 스케일러블 동영상 전송 기법

  • 김용관 (호서대학교 전기정보통신 공학부 정보통신전공) ;
  • 김승환 (서울대학교 전기.컴퓨터 공학부 신호처리연구실) ;
  • 이상욱 (서울대학교 전기.컴퓨터 공학부 신호처리연구실)
  • Published : 2004.03.01
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Abstract

In this paper, we propose a novel scalable video coding algorithm based on adaptively weighted multiple reference frame method. To improve the coding efficiency in the enhancement layer, the enhancement frame is predicted by the sum of adaptively weighted double motion compensated frames in the enhancement layer and the current frame in the base layer, according to the input video characteristics. By employing adaptive reference selection scheme at the decoder, the proposed method reduce the drift problem significantly. From the experimental results, the proposed algorithm shows more than 1.0 ㏈ PSNR improvement, compared with the conventional scalable H.263+ for various packet loss rate channel conditions.

본 논문에서는 동영상 부호화의 이동 보상 과정에서 다중의 참조 영상들을 적응적으로 이용하는 새로운 스케일러블(scalable) 부호화 기법을 제안한다. 제안 기법은 입력 신호의 특성을 고려하여. 확장계층 및 기저계층에서 다중의 이동 참조 영상들에 대한 최적 가중 값을 적응적으로 구한다. 이러한 기법을 이용하여. 확장계층의 부호화 효율 및 오류에 대한 강인성을 향상시킨다. 또한 복호기에서 전송 오류가 검출된 경우. 적응적으로 참조 영상을 선택함으로써 에러 파급(drift) 현상을 현저히 감소시킨다 실험 결과들로부터, 제안하는 적응적인 스케일러블 부호화 기법은 다양한 채널 에러(channel error) 환경에서, 기존의 스케일러블 H.263+부호화 기법에 비하여 PSNR 성능이 약 1.0㏈ 이상 향상됨을 확인할 수 있었다.

Keywords

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