可恢复的数字语音取证水印技术研究

项目名称： 可恢复的数字语音取证水印技术研究

项目编号： No.61502409

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 自动化技术、计算机技术

项目作者： 刘正辉

作者单位： 信阳师范学院

项目金额： 21万元

中文摘要： 数字语音处理技术的发展和编辑工具的丰富，使对数字语音的篡改和伪造变得简单易行。伪造数字语音的存在使数字语音面临失去信任的威胁，严重影响了数字语音为载体的数字内容的可信度和公众认可度。可恢复的数字语音取证水印技术是解决该问题的有效途径。目前，数字语音取证水印的研究主要集中在对恶意攻击的篡改定位上，缺少对被攻击内容的篡改恢复。本项目以数字语音内容的篡改恢复为研究目标，主要研究内容包括：（1）安全的精确篡改定位数字语音取证水印方案研究；（2）用于篡改恢复的信号生成方法研究；（3）将用于篡改恢复的信号作为水印嵌入的大容量水印嵌入算法研究。这项研究为还原被攻击数字语音内容要表达的真实含义，挖掘攻击者有意掩盖的事实提供技术支持；为推断攻击者的意图提供有益参考，进而为构建法治社会提供有利保障。同时，也有助于推动数字语音取证水印技术的推广和应用。

中文关键词： 数字水印；语音取证；篡改恢复；语音压缩

英文摘要： For the development of digital speech processing technology and the increasingly rich of the editing tools for digital speech signal, it is easy to attack and forge the digital speech. The existence of fake digital speech makes the digital voice faces the threat of losing trust, and has affected the credibility and public recognition of digital content expressed by digital speech signal seriously. Recoverable digital speech authentication technology based on digital watermark is an effective way to solve the problem. At present, the research of digital watermark used for speech forensics is focused on tamper location of hostile attack, while lack the research of tamper recovery for the attacked signal. The research target of the project is to recover the digital speech signal subjected to malicious attack, and the main research contents include: (1) Studying the security and precise tamper location speech authentication scheme based on watermarking; (2) Studying the generation method of the signal used to tamper recovery; (3) Presenting a high-capacity watermark embedding method for the signal used to tamper recovery, regarded as the watermark. This study will provide technical support for restoring the original meaning of the attacked digital speech and exploring the facts that attackers mean to cover up, and provide the useful reference for inferring the attacker’s intention and strong guarantee for constructing modern legalistic society. Meanwhile, this study can help to promote the digital speech authentication watermark technology popularization and application.

英文关键词： Digital Watermark;Speech Authentication;Tamper Recovery;Speech Compression