基于小波变换和均匀量化音频水印.doc

题 目： 基于小波变换和均匀量化的音频水印 年 月 日 毕业设计中文摘要 基于小波变换和均匀量化的音频水印 摘要： 随着数字信号处理技术的飞速发展，数字媒体的复制、加工以及传播变得非常方便，但作品侵权更加容易。音频是人类交流的一种重要工具，在音频信号中嵌入水印可以保护音频产品的知识产权。 本文首先介绍了数字水印技术研究的意义和背景以及国内外的研究现状。其次通过对音频水印技术的概述引出了本文重点研究的算法——基于小波变换和均匀量化的音频水印。最后，对音频水印的嵌入和提取进行研究，以音频作为载体，采用小波变换及均匀量化方法将数字信息嵌入到载体音频中。同时将水印图像进行置乱以增加必威体育官网网址性和安全性，对音频信号进行小波变换，在其系数中嵌入水印，再对小波系数进行均值量化，从而实现在音频文件中嵌入图像水印信息，使水印具有较好的不可感知性和良好的抗攻击性。 关键词： 小波变换 均匀量化 音频水印 毕业设计外文摘要 Title Audio Watermark Based on Wavelet Transform and Uniform Quantization Abstract With the digital signal processing technology in the rapid development, the replication, processing and dissemination of the digital media has become very convenient. However, it is easier for works to infring. Audio is an important tool of human communication. Embed watermark in the audio signal audio product can protect the intellectual property. First, this paper describes the significance of digital watermarking technology and the background and status of domestic and foreign research. Second, through the overview of the audio watermarking technology, it leads to the algorithm of this paper focuses on-- audio watermarking based on wavelet transform and uniform quantization . Last, this paper studies the embedding and extraction of audio watermark, takes the audio as a carrier, and embeds digital information into the audio through wavelet transform and uniform quantization method.Meanwhile it scrambles the watermark image to increase the privacy and security, transforms the audio signal, embeds watermark in the coefficient, quantitates wavelet coefficients, achieves watermark images embedded in the audio file, and makes the watermark have good non-sensory and non-aggressive resistance. Keywords： Wavelet Transform Uniform Quantization Audio Watermarking  目 次 1 引言…………………………………………………………………………………… 1 1.1研究背景及意义…………………………………………………………………… 1 1.1.1数字水印的特点…………………………………………………………