| Summary: | 碩士 === 大同大學 === 通訊工程研究所 === 97 === According to the development of the Internet, a lot of digital information conserves to computer and internet, the digital data is easy to copy and recondition by internet. Therefore, the authors protect their Intellectual Property Rights, The embedding of digital watermark into multimedia content has been proposed to deal with this problem. In traditional watermarking algorithms, the insertion of watermark into the host signal inevitably introduces perceptible quality degradation and the inherent conflict between imperceptibility and robustness. Zero-watermarking technique was proposed to solve these problems successfully. This scheme extracts some essential characteristics from host signal and uses them for watermark detection instead of embedding watermark into original signal. In actual applications, the secret key which was constructed after the zero-watermarking schemes should be assigned a time stamp by authority authentication department.
In this paper, we application zero-watermarking technique for digital audio, we propose three zero-watermark schemes to search the digital audio characteristics in time domain. The schemes have some character, they are easy to execute and encryption very fast.
Simulation results show that our schemes can get the embedded watermark back after taking several attacks, and experiments show that the recovery performance of high sampling rate audio which used the method C can have excellent efficiency. The Simulation results satisfy the digital watermark technical properties of transparency, robustness, unambiguity, security, and blindness.
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