Journal of Broadcast Engineering (방송공학회논문지)

The Korean Institute of Broadcast and Media Engineers (한국방송∙미디어공학회)
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UCC-Resilient HD Content Watermarking Scheme on DCT Compressed Domain

UCC 편집에 강인한 DCT 압축영역 기반 고화질 영상 워터마킹 기법

  • Kim, Jung-Youn (School of Mobile Communication & Digital Broadcasting Engineering, UST, Broadcasting & Telecommunications Media Research Department, ETRI) ;
  • Nam, Je-Ho (School of Mobile Communication & Digital Broadcasting Engineering, UST, Broadcasting & Telecommunications Media Research Department, ETRI)
  • 김정연 (과학기술연합대학원대학교(UST) 이동통신 및 디지털방송공학, 한국전자통신연구원(ETRI) 방통미디어연구부) ;
  • 남제호 (과학기술연합대학원대학교(UST) 이동통신 및 디지털방송공학, 한국전자통신연구원(ETRI) 방통미디어연구부)
  • Published : 2008.07.30
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Abstract

We propose a novel high-definition content watermarking algorithm that is highly feasible in UCC (User Created Contents) environment. We begin by addressing an association between broadcasting content and UCC in a view of copyrights, then present watermark requirements by analyzing various UCC editing-effect. Also, we provide a brief review of previous watermarking techniques that are supposed to satisfy the requirements. Our proposed scheme inserts a invisible watermark into both DC and AC components on $8{\times}8$ block DCT domain and extracts them after synchronization using DC image. Experimental results show that our technique satisfies the requirements of invisibility and robustness to a variety of attacks such as rotation, scaling, cropping, and JPEG compression, etc. Note that the proposed scheme is highly resilient to UCC edit attacks that are combined by many different types of watermark attacks.

본 논문은 UCC 환경에 강인한 고화질 영상 위터마킹 방법을 제안한다. 우선 영상의 저작권 측면에서 방송영상과 UCC의 관계를 설명하며, UCC 편집유형의 분석을 통하여 워터마크 요구사항을 제시한다. 그리고 기존 연구의 고찰을 통하여 요구사항에서 제시한 주요공격에 강인한 워터마킹 방법을 살펴본다. 제안된 알고리즘의 워터마크 삽입은 $8{\times}8$ 블록 DCT 영역의 DC 성분과 AC 성분에서 수행되며, 워터마크 추출은 기하학적 공격에 대비하여 DC 영상을 이용한 동기화 과정 후 수행한다. 성능평가 실험에서는 삽입된 워터마크의 비가시성과 강인성을 검증하여 제시된 요구사항에 만족함을 확인하였다. 특히 제안된 알고리즘은 다양한 공격이 복합적으로 적용되는 UCC 환경에서 강인한 것으로 확인되었다.

Keywords

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