基于LDPC码保护的DWT数字水印算法研究
首发时间:2007-12-27
摘要:LDPC码具有很好的纠错能力,本文利用它来对数字水印(DWT水印 )进行了保护,以提高DWT水印算法的性能。仿真结果表明:在有LDPC码保护的情况下,水印的差错率有所下降,且随着LDPC码率的降低,对水印的保护能力有所增强;与基于LDPC码保护的DCT水印 相比,本文所用算法实现简单且表现出了优越性。
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A DWT digital image watermark algorithm based on the protection of LDPC
Abstract:To improve the robustness and lower the error bit rate of watermark, we employ LDPC which is powerful for the improvement of error bit to protect the digital image watermark( DWT digital image watermark algorithm) in this paper.The experiment results demonstrate the conclusions and tell us that we can improve the protection ability of LDPC by lower the LDPC code rate,also that the proposed algorithm is superior to the DCT digital image watermark algorithm based on the protection of the LDPC.
Keywords: LDPC;Digital watermark;DWT;Robustness
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No.1747518064211987****
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