Digital Audio Watermarking Based on Holographic Nonlinear Limiter

摘要：

A new approach of digital audio watermarking by use of nonlinear amplitude limiting computer-generated hologram (CGH) is proposed to significantly improve the robustness than traditional CGH method. The amplitude and phase are extracted on the basis of traditional Fourier transform holography. Binary Fourier hologram was formed by nonlinear amplitude limiting algorithm when the phase information as input function and the amplitude information transferred into a bias function. The robustness of audio watermarking is much high because the binary hologram has stronger anti-interference property than the normal hologram. And because of the small amount of data in binary hologram, redundant embedding method can further improve the robustness. The CGH is embedded into audio signal by quantification technology and discrete-cosine-transform (DCT) algorithm. It can be extracted without the original audio signal and the security key provides good security. Experimental results show that the algorithm has more robustness than audio watermarking algorithm based on general CGH against common signal manipulations and attacks, such as lossy compression, re-sampling, low-pass filter, noise, and so on.

关键词： information optics audio watermarking nonlinear amplitude limiting computer-generated hologram DCT

作者: Da-Qing Chen Ji-Hua Gu Hao Zhou

作者单位: Soochow University Physics Department Suzhou, China

会议类型: 国际会议

会议名称: 2011 International Conference on Electronics and Optoelectronics(2011电子学与光电子学国际会议 ICEOE 2011)

会议地点: 大连

会议语种:英文

页码: 91-94

在线出版日期: 2011-07-29（万方平台首次上网日期，不代表论文的发表时间）