基于扩频技术的音频水印处理算法的研究

目前的数字水印算法,主要集中在针对图像和视频,对音频、语音数据产品的数字水印算法研究仍然较少,需要提出更多的有效的针对音频、语音数据的数字水印算法。该文以二值图像作为数字水印信息,以音频为嵌入对象,在离散傅立叶变换域的系数上嵌入水印。在离散余弦变换域,采用扩频技术通过对变换域系数进行量化来嵌入水印信息,在水印的提取过程中不需要原始音频信号的参与。

Research on the Audio Water-marking Processing Algorithm based on the Spectrum-spread Technology

The current watermark information algorithms applied widely are related with image and video.The watermark algorithms of audio and speech is few especially,we must find more and more effective watermarking algorithms for audio and speech data.This dissertation selects two-dimension binary image as watermark information,and selects audio as embedding object,and embed the watermark information,and selects audio as embedding object,and embed watermark in the coefficient of the DFT domain,the DCT domain,the DWT domain.In the discrete cosine domain,the watermark is embedded by quantifying the coefficient of the DCT domain,Spectrum-spread is applied.The watermark can be extracted without the original audio.