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A Quantization-adaptive Watermarking Algorithm to Protect MPEG Moving Picture Contents  

Kim Joo-Hyuk (Mtekvision Co.,Ltd)
Choi Hyun-Jun (Dept. of Electronic Materials Eng., Kwangwoon University)
Seo Young-Ho (Dept. of Information Communication Eng., Hansung University)
Kim Dong-Wook (Dept. of Electronic Materials Eng., Kwangwoon University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.42, no.6, 2005 , pp. 149-158 More about this Journal
Abstract
This paper proposed a blind watermarking method for video contents which satisfies both the invisibility and the robustness to attacks to prohibit counterfeiting, modification, illegal usage and illegal re-production of video contents. This watermarking algorithm targets MPEG compression system and was designed to control the amount of watermarking to be inserted according to the adaptive quantization scale code to follow the adaptive quantization of the compression system. The inserting positions of the watermark were chosen by considering the frequency property of an image and horizontal, vertical and diagonal property of a $8{\times}8$ image block. Also the amount of watermarking for each watermark bit was decided by considering the quantization step. This algorithm was implemented by C++ and experimented for invisibility and robustness with MPEG-2 system. The experiment results showed that the method satisfied enough the invisibility of the inserted watermark and robustness against attacks. For the general attacks, the error rate of the extracted watermark was less than $10\%$, which is enough in robustness against the attacks. Therefore, this algorithm is expected to be used effectively as a part in many MPEG systems for real-time watermarking, especially in the sensitive applications to the network environments.
Keywords
watermarking; MPEG system; quantization-adaptive watermarking; network-sensitive applications; adaptive quantization;
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