Signature Extraction Method from H.264 Compressed Video

H.264/AVC로 압축된 비디오로부터 시그너쳐 추출방법

  • Kim, Sung-Min (Dept. of Electronics Engineering, Dongguk University) ;
  • Kwon, Yong-Kwang (Dept. of Electronics Engineering, Dongguk University) ;
  • Won, Chee-Sun (Dept. of Electronics Engineering, Dongguk University)
  • Published : 2009.05.25

Abstract

This paper proposes a compressed domain signature extraction method which can be used for CBCD (Content Based Copy Detection). Since existing signature extraction methods for the CBCD are executed in spatial domain, they need additional computations to decode the compressed video before the signature extraction. To avoid this overhead, we generate a thumbnail image directly from the compressed video without full decoding. Then we can extract the video signature from the thumbnail image. Experimental results of extracting brightness ordering information as the signature for CBCD show that our proposed method is 2.8 times faster than the spatial domain method while maintaining 80.98% accuracy.

본 논문은 H.264/AVC 비디오 압축영역에서 비디오 복제 방지기법의 일종인 CBCD(Content Based Copy Detection)에 사용 될 수 있는 비디오 시그너쳐 (Video Signature) 추출 방법을 제안한다. 기존의 비디오 시그너쳐 추출방법은 모두 비디오 공간영 역에서 수행되기 때문에 압축된 비디오 스트립으로부터 시그너쳐를 추출하기 위해서는 비디오를 모두 복호해야 하는 단점을 가지고 있었다. 하지만 제안하는 방법에서는 비디오 압축영역에서 섬네일(Thumbnail)을 빠르게 구성하고 구성된 섬네일을 이용하여 비디오 시그너쳐를 추출하여 이와 같은 단점을 극복하였다. 밝기 순서 정보를 추출하는 실험결과로부터 제안하는 방법은 기존의 방법보다 80.98%의 정확도를 유지하면서 약 2.8배 빠르게 시그너쳐를 추출할 수 있었다.

Keywords

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