畢设论文数字音频水印系统的设计与实现.docxVIP

摘 要 伴随着科学技术的飞速发展,互联网多媒体技术的广泛应用,电子图书、数码照片、音频视频等数字产品已逐渐成为人们生活娱乐的重要组成部分。这些数字产品具有易传播性和易修改性,为维护数字产品生产方的利益需对其进行版权保护。 数字水印技术就是为解决这一问题而诞生出来的技术手段。它是依据某种特定的算法,将签名、序列号等身份认证信息嵌入到数字产品中,并可将水印信息提取出来进行甄别鉴定,来达到作品产权保护的目的。不可感知性和鲁棒性是评价数字水印技术的主要指标。 本文是对数字音频水印系统进行研究和设计，通过学习数字音频水印技术特点，以直观的二值图像作为水印信息，结合人类听觉系统的特点，利用离散小波变换（DWT）的时频分析特性和多分辨率分析特性，给出了一种基于离散小波变换的数字音频水印算法。首先对作为水印的二值图像进行降维操作后，再对原始音频信号进行三级离散小波变换，然后进行音频分段，接着选择离散小波变换细节高频分量作为嵌入点，然后再通过修改原始音频信号小波系数小数点后的奇偶性进行数据的嵌入。 本课题是针对音频水印技术的相关操作,进行实用性软件产品开发的探索。其研究成果对音频水印系统的推广有一定的积极意义。 关键词：数字音频水印；离散小波变换；LabVIEW Abstract Along with the rapid development of science and technology, and the wide application of the Internet multimedia technology, digital products such as e-books, digital photos, audio and video have gradually become an important part of humans live and play. These digital products are easy to modify and spread. It is necessary to protect the digital products copyright in order to safeguard the producers benefit. Digital watermarking technology is an effective mean to solve this problem. It is based on some particular algorithm to embed the signature, serial number and other identity authentication information into digital products, and to extract the watermark information for screening identification, to achieve the purpose of protecting the property rights of the work. Imperceptibility and robustness are the main features of the digital watermark. This paper is about research and design of the digital audio watermarking system，through the study of the characteristics of digital audio watermarking.By using the two-dimension binary image as watermarking information and integrating the Human Auditory System and utilizing the spatiotemporal frequency and multi-resolving-power characteristic of one-dimension discrete wavelet transform,a audio digital watermarking algorithm based on wavelet transform is presented. First should make the binary image as a watermark to reduce the dimension operations，and then make the original audio signal for th