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。
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.
出处
《计算机工程》
CAS
CSCD
北大核心
2009年第19期224-226,250,共4页
Computer Engineering
基金
上海市科委基金资助项目"声像鉴定关键技术研究"(052112035)
关键词
数字音频篡改
司法鉴定
小波降噪
本底噪声
digital audio tampering
judicial authentication
wavelet de-noising
background noise
