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ASCII data hiding method based on blind video watermarking using minimum modification of motion vectors  

Kang, Kyung-Won (홈캐스트 기술연구소 MF개발팀)
Ryu, Tae-Kyung (부경대학교 전자컴퓨터정보통신공학부)
Jeong, Tae-Il (동명대학교 정보통신공학과)
Park, Tae-Hee (동명대학교 메카트로닉스공학과)
Kim, Jong-Nam (부경대학교 전자컴퓨터정보통신공학부)
Moon, Kwang-Seok (부경대학교 전자컴퓨터정보통신공학부)
Abstract
With the advancement of the digital broadcasting and popularity of the Internet, recently, many studies are making on the digital watermarking for the copyright protection of digital data. This paper proposes the minimum modification method of motion vector to minimize the degradation of video quality, hiding subtitles of many language and information of OST(original sound track), character profiles, etc. as well as the copyright protection. Our proposed algorithm extracts feature vector by comparing motion vector data with watermark data, and minimize the modification of motion vectors by deciding the inversion of bit. Thus the degradation of video quality is minimized comparing to conventional algorithms. This algorithm also can check data integrity, and retrieve embedded hidden data simply and blindly. And our proposed scheme can be useful for conventional MPEG-1, -2 standards without any increment of bit rate in the compressed video domain. The experimental result shows that the proposed scheme obtains better video quality than other previous algorithms by about $0.5{\sim}1.5dB$.
Keywords
Video Watermarking; Blind Watermarking; Motion Vector; Adaptive Threshold; Re-Estimation;
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