Hardware Implementation of Real-Time Blind Watermarking by Substituting Bitplanes of Wavelet DC Coefficients 


Vol. 29,  No. 3, pp. 398-407, Mar.  2004


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  Abstract

In this paper, a blind watermarking method which is suitable to the video compression using 2-D discrete wavelet transform was proposed and implemented into the hardware using VHDL(VHSIC Hardware Description Language). The goal of the proposed watermarking algorithm is the authentication about the manipulation of the watermark embedded image and the detection of the error positions. Considering the compressed video image, the proposed watermarking scheme is unrelated to the quantization and is able to concurrently embed or extract the watermark. We experimentally verified that the lowest frequency subband(LL4) is not sensitive to the change in the spatial domain, so LL4 subband was selected for the mark space. And the combination of the bitplanes which has the properties of both the minimum degradation of the image and the robustness was chosen as the embedded point in the mark space in LL4 subband. Since we know the watermark embedded positions and the watermark is embedded by not varying the value but changing the value, the watermark can be extracted without the original image. Also, for the security when exposing the watermark embedded position, we embed the encrypted watermark by the block cipher. The proposed watermark algorithm shows the robustness against the general image manipulation and is easily transplanted into the image or video compressor with the minimal changing in the structure. The designed hardware has 4037 LABs(24%) and 85 ESBs(3%) in APEX20KC EP20K400CF672C7 FPGA of Altera and stably operates in 82 MHz clock frequency.

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  Cite this article

[IEEE Style]

Y. Seo and D. Kim, "Hardware Implementation of Real-Time Blind Watermarking by Substituting Bitplanes of Wavelet DC Coefficients," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 3, pp. 398-407, 2004. DOI: .

[ACM Style]

Young-Ho Seo and Dong-Wook Kim. 2004. Hardware Implementation of Real-Time Blind Watermarking by Substituting Bitplanes of Wavelet DC Coefficients. The Journal of Korean Institute of Communications and Information Sciences, 29, 3, (2004), 398-407. DOI: .

[KICS Style]

Young-Ho Seo and Dong-Wook Kim, "Hardware Implementation of Real-Time Blind Watermarking by Substituting Bitplanes of Wavelet DC Coefficients," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 3, pp. 398-407, 3. 2004.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880