基于量化小波变换的双同步音频水印方法

Bisynchronous approach in audio watermarking based on quantization discrete wavelet transform

在音频水印技术中提出了一种双同步方法,包括了自同步和外同步两个环节。抽取音频的5个特征来设计同步峡谷标记,用于水印信息的嵌入定位。紧随着各峡谷的是外同步技术,用于确定可用水印。同时,设计了一种自适应匹配方法,从多个侯选水印中计算出最终水印。提出的算法能够抵抗大多数信号处理和攻击,包括重采样、重量化、MP3编码、回声延迟、高斯噪声和大面积剪切攻击,对低通滤波攻击也具有一定的抵抗能力。

A bisynchronous approach was proposed for audio watermarking. The bisynchronous process consisted of selfsynchronization and additive synchronization. A kind of synchronous valley was created for watermark location through five features drawn from audio carrier. Following the synchronous valleys, the additive synchronous approach was adopted to locate the usable watermarks. Meanwhile, all adaptive matching approach was stated to obtain the final watermark from several candidates. The bisynchronous algorithm was robust against most common signal processing and attacks, such as re-sampling, re-quantization, MP3 compression, echo delay, Gaussian noise corruption and cropping. It also can be against some of low pass filtering attacks.