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Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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Multimedia Fingerprinting in DCT Block

DCT 블록의 멀티미디어 핑거프린팅

  • 이강현 (조선대학교 전자정보공과대학 전자공학과)
  • Received : 2011.08.05
  • Accepted : 2011.09.01
  • Published : 2011.09.30
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Abstract

In this paper, it was implemented an algorithm of multimedia fingerprinting in DCT block. For the improvement of the limits of DRM’s ability, the proposed algorithm could be decided a responsibility boundary to judge a traitor who falsified the content according to perform separately a watermarking of content provider and a fingerprinting of content user. At the test image size($128{\times}128$) and block size($8{\times}8$) of the content provider, the measured PSNR is Inf~46.6dB with watermarking strength ${\Theta}=0.5{\sim}1.2$, and at a number of users and user's code length are n=7,15,31,63 and l=7,15,31,64 each, the measured PSNR is Inf~46.1 with fingerprinting code length l=7,15,31,63. Finally, a traitor tracing of the falsified content is approached to a trace ratio 1 which is extended to n-1.

본 논문에서는 DCT 블럭에서 실행되는 멀티미디어 핑거프린팅 알고리즘을 구현한다. 제안된 알고리즘은 DRM의 한계성을 개선하고, 콘텐츠 제공자의 워터마킹과 콘텐츠 사용자의 핑거프린팅을 분리 수행함으로써 위조 및 변조된 콘텐츠의 부정자를 판단하는 책임경계를 결정할 수 있다. 콘텐츠 제공자의 $128{\times}128$ 영상에서 블록크기 $8{\times}8$에 워터마킹 삽입강도 ${\Theta}$는 0.5~1.2까지 적용하여 PSNR은 Inf~46.6dB로 측정되었으며, 콘텐츠 사용자는 블록크기 64 픽셀 범위 내에서 BIBD 기반 코드길이가 l=7,15,31,64를 사용자의 수 n=7,15,31,63에 따라 핑거프린팅 코드길이 또한 l=7,15,31,63으로 PSNR은 Inf~46.1로 측정되었다. 위조 및 변조된 콘텐츠의 부정자 추적은 n-1까지 확장되어 추적율은 1에 접근 되었다.

Keywords

References

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