不同手机及不同通信网络通话录音质量评析  

Evaluation on Quality of Voices Recorded from Testing into Different Mobile Phones and Telecom Networks

作　　者：申小虎[1] 金恬[2] 王雷[3] 韩朝阳 SHEN Xiaohu;JIN Tian;WANG Lei;HAN Chaoyang(Department of Forensic Science and Technology,Jiangsu Police Institute,Nanjing,210031,China;Evidence Identifi cation Center,Jiangsu Provincial Public Security Department,Nanjing,210031,China;Criminal Technology Division,Hainan Provincial Public Security Department,Haikou,570203,China;Criminal Police Detachment,Yancheng Public Security Bureau,Yancheng 224001,Jiangsu,China)

机构地区：[1]江苏警官学院刑事科学技术系,南京210031 [2]江苏省公安厅物证鉴定中心,南京210031 [3]海南省公安厅刑事技术处,海口570203 [4]盐城市公安局刑警支队,江苏盐城224001

出　　处：《刑事技术》2021年第6期587-593,共7页Forensic Science and Technology

基　　金：公安部应用创新计划项目(2020YYCXHNST046);现场物证溯源技术国家工程实验室开放课题(2018NELKFKT10)。

摘　　要：目的为送检手机通话录音质量的审查提供理论依据。方法提出一种定量化的语音检材质量评价标准,并对不同手机及不同通信网络下的录音进行质量评价。该标准基于主流鉴定设备,涵盖了声学语谱图共振峰个数及数值、基频参数、区域平均频谱等分析方法以及声纹比对测试。结果实验结果显示,不同条件下得到的通话录音质量存在一定的差异性,会对声纹图谱鉴定产生一定影响,但并不会造成本质性差异。结论语音同一认定中,对基于移动通信网络获取的检材录音应考虑到通话语音质量的差异性对检验的影响,并在鉴定分析中加以评估和克服。Objective To provide a theoretical basis for examination of mobile phone’s recording quality that is important for correct opinion to deliver in the forensic voiceprint identification of voice samples from the ubiquitous mobile phone calls.Methods A quantitative standard was proposed for evaluation of the recorded samples that were obtained from the tested mobile phones and generation-various telecom networks.The standard,rooting on the basis of mainstream identification equipment,was analyzed into the quantity and digital values of formant in voiceprint spectrogram,fundamental frequency parameters,regional average spectrum and implemented voiceprint comparison test.Results The test results showed that certain differences existed with the recording quality under different conditions,having caused definite influence on voiceprint identification,yet at a non-essential extent.Conclusion For voice identity authentication,the influence should be considered of recording quality differences on identification of the recorded samples from different mobile phones and telecom networks,therewith evaluated and overcome during identification.

关 键 词：移动通信 录音质量 语音同一鉴定 声纹图谱 

分 类 号：D793.2[政治法律—政治学]