基于傅里叶分析法的音频电网频率检测系统的设计  

Design of Frequency Detection System of Audio Frequency Network Based on Fourier Analysis

作　　者：王怀钰 付炳坤 吴章龙 金绪鹏 余卓璞 Wang Huaiyu;Fu Bingkun;Wu Zhanglong;Jin Xupeng;Yu Zhuopu(School of Information and Communication Engineering,Nanjing Institute of Technology,Nanjing Jiangsu 211100,China)

机构地区：[1]南京工程学院信息与通信工程学院,江苏南京211100

出　　处：《信息与电脑》2020年第7期107-110,共4页Information & Computer

基　　金：江苏省高等学校大学生创新创业训练计划项目(项目编号:201911276069Y)。

摘　　要：随着数字化时代的到来,以数字化形式存储的数字音频有着易存储、易复制等优点,在给生活带来极大便利的同时也存在易被篡改的问题,因此音频的完整性对于调查取证有着十分重要的意义。基于此,笔者根据ENF提取技术的研究现状,利用Beyound Compare和Matlab设计出基于傅里叶分析法的音频检测系统,该系统可以高效地提取音频中电网频率并实现音频完整性的检测。With the advent of the digital era,digital audio stored in digital form has the advantages of easy storage,easy replication and so on.It brings great convenience to life,but also has the problem of easy tampering.Therefore,the integrity of audio is of great significance for investigation and evidence collection.Based on this,according to the research status of enf extraction technology,the author designs an audio detection system based on Fourier analysis using beyond compare and MATLAB.The system can effectively extract the grid frequency in audio and realize the detection of audio integrity.

关 键 词：语音取证 傅里叶分析法 音频检测系统 ENF STM32 

分 类 号：G434[文化科学—教育学] G712[文化科学—教育技术学]