论文标题
语音水印：数字电话录音的法医分析的方法
Speech watermarking: an approach for the forensic analysis of digital telephonic recordings
论文作者
论文摘要
在本文中，作者讨论了数字音频记录的法医身份验证的问题。尽管在几篇文章中已经解决了法医音频，但现有的方法集中在模拟磁性记录上，由于市场上可用的数字录音器大量（光学，固态，硬盘等），因此该模拟磁性记录不那么普遍。提出了一种基于数字信号处理的方法，该方法由用于语音水印的扩展频谱技术组成。这种方法表明了身份验证是基于信号本身而不是记录格式的优势。因此，这对于在警察控制的电话拦截中通常录制设备是有效的。此外，我们的建议允许引入相关信息，例如录制日期和时间以及所有相关数据（经典系统并非总是可以）。我们的实验结果表明，语音水印程序不会与后法医扬声器鉴定有重大干扰。
In this article, the authors discuss the problem of forensic authentication of digital audio recordings. Although forensic audio has been addressed in several articles, the existing approaches are focused on analog magnetic recordings, which are less prevalent because of the large amount of digital recorders available on the market (optical, solid state, hard disks, etc.). An approach based on digital signal processing that consists of spread spectrum techniques for speech watermarking is presented. This approach presents the advantage that the authentication is based on the signal itself rather than the recording format. Thus, it is valid for usual recording devices in police-controlled telephone intercepts. In addition, our proposal allows for the introduction of relevant information such as the recording date and time and all the relevant data (this is not always possible with classical systems). Our experimental results reveal that the speech watermarking procedure does not interfere in a significant way with the posterior forensic speaker identification.
