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计算机工程 ›› 2009, Vol. 35 ›› Issue (19): 224-226,. doi: 10.3969/j.issn.1000-3428.2009.19.075

• 多媒体技术及应用 • 上一篇    下一篇

数字音频与录制设备的相关性研究

邵松年1,黄 征1,徐 彻2,施少培2,杨 旭2   

  1. (1. 上海交通大学信息安全工程学院,上海 200240;2. 司法部司法鉴定科学技术研究所,上海 200063)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-10-05 发布日期:2009-10-05

Research on Correlation of Digital Audio and Recording Device

SHAO Song-nian1, HUANG Zheng1, XU Che2, SHI Shao-pei2, YANG Xu2   

  1. (1. School of Information Security and Engineering, Shanghai Jiaotong University, Shanghai 200240; 2. Institute of Forensic Science Ministry of Justice P.R.China, Shanghai 200063)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-10-05 Published:2009-10-05

摘要: 提出一种在没有数字水印和数字签名的情况下,依据数字音频文件本身的特性鉴定其真实性的方法。利用小波降噪得到音频的噪声,以该噪声作为设备的特征本底噪声,与需要检测的音频本底噪声做比对,以检测该音频文件中是否被篡改入由其他种类设备录制的音频,从而为司法鉴定提供判断的依据。

关键词: 数字音频篡改, 司法鉴定, 小波降噪, 本底噪声

Abstract: This paper proposes a method for detecting the digital audio through its characteristics without any digital watermark or signature embedded in. It gets the incidental background noise characteristics of the sample audio by wavelet de-noising, and compares it with the background noise of other audio to detect whether it is tampered by another piece of audio recorded by another type of device, which provides the evidence for judicial authentication.

Key words: digital audio tampering, judicial authentication, wavelet de-noising, background noise

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