基于提升小波的多重數字音頻水印

王讓定; 徐達文

基于提升小波的多重數字音頻水印

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出版歷程
- 收稿日期: 2005-01-06
- 修回日期: 2005-06-21
- 刊出日期: 2006-10-19

Multiple Audio Watermarks Based on Lifting Wavelet Transform

摘要

摘要: 該文提出了一種在提升小波域同時嵌入魯棒水印和易損水印的音頻水印算法。原始音頻信號經過提升小波變換后，將低頻小波系數進行均值量化嵌入魯棒水印，具有較好的魯棒性和不可感知性；對高頻小波系數直接進行單個系數量化嵌入易損水印，當音頻內容發(fā)生篡改時，這些水印信息會發(fā)生相應的改變，從而可以鑒定原始音頻的完整性。水印的提取不需要原始音頻信號。實驗結果表明，魯棒水印對MP3壓縮、低通濾波、加噪、重量化、重采樣等信號處理攻擊具有很強的魯棒性；而易損水印對上述攻擊則具有很強的敏感性。
- 多重音頻水印; 提升小波變換; 盲檢; 魯棒水印; 易損水印
Abstract: An audio watermarking scheme which embedded robust and fragile watermark at the same time in lifting wavelet domain is presented. Robust watermark is embedded in the low frequency range using mean quantization. It has great robustness and imperceptibility. Fragile watermark is embedded in the high frequency range by quantizating single coefficient, when the audio signal is tampered, the watermark information will change synchronously. So it can be used for audio content integrity verification. The watermark can be extracted without the original digital audio signal. Experimental results show that robust watermark is robust to many attacks, such as MP3 compression, low pass filtering, noise addition, requantization, resampling and so on. Fragile watermark is very sensitive to these attacks.

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