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An Efficient Video Watermarking Using Re-Estimation and Minimum Modification Technique of Motion Vectors  

Kang Kyung-won (부경대학교 전자컴퓨터정보통신공학부)
Moon Kwang-seok (부경대학교 전자컴퓨터정보통신공학부)
Kim Jong-nam (부경대학교 전자컴퓨터정보통신공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.6C, 2005 , pp. 497-504 More about this Journal
Abstract
We propose an efficient video watermarking scheme using re-estimation and minimum modification technique of motion vectors. Conventional methods based on motion vectors do watermarking using modification of motion vectors. However, change of motion vectors results in the degradation of video quality. Thus, our scheme minimizes the modification of the original motion vectors and replaces an original motion vector by the adjacent optimal motion vector using re-estimation of motion vectors to avoid degradation of video quality. Besides, our scheme guarantees the amount of embedded watermark data using the adaptive threshold considering for an efficient video watermarking. In addition, this is compatible with current video compression standards without changing the bitstream. Experimental result shows that the proposed scheme obtains better video quality than other previous algorithms by about $0.6{\sim}1.3\;dB$.
Keywords
video watermarking; blind watermarking; motion vector; adaptive threshold; re-estimation;
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