Non-embedded audio watermark based on wavelet transform

Fang Ding,Xiaofeng Wang,Yang Shen,Yanan Lu,Jicheng Hu

Software Engineering and Service Science（2012）

引用 2|浏览22

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摘要

This paper proposes a new non-embedded audio watermark scheme based on wavelet transform. The input audio signal is first transformed into a series of wavelet coefficients at different resolution via Fast Wavelet Transform. The energy ratio sequence (ERS) of the high frequency component in forth scale is then calculated. The copyright information is transformed into a key of digital watermark coding. The key is then XOR the ERS of the decomposition of the input audio signals as a third-party kept cryptographic key. Experiment result shows that the proposed watermark scheme can hide intellectual property copyright information into digital audio while without losing of sound quality of the signal.

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关键词

audio watermarking,copyright,public key cryptography,signal resolution,wavelet transforms,ers,xor,audio signals decomposition,copyright information,digital audio,digital watermark coding,energy ratio sequence,fast wavelet transform,high frequency component,intellectual property copyright information,nonembedded audio watermark,signal sound quality,third-party kept cryptographic key,wavelet coefficients,non-embedded audio watermark,wavelet decomposition,decoding,data mining,watermarking,robustness,cryptography

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