| With the quickly development of science innovation and internet technology,previous method of identity verification no longer can provide adequate protection for user’s information safety and property.The traditional authentication method is gradually replaced by biometric authentication.As one of the biometric authentications,voiceprint has been gradually applied to various fields of real life since it has the advantages like easily available,low cost of collection and high safety.In particular,recently,more and more voice samples were judged as valid evidence by courts which makes the theoretical meaning and practical value of voiceprint verification technology attract more and more people’s concern.In this study,we focus on the research and development of voiceprint verification system,Firstly,the background,development history,domestic and abroad application status of speaker’s verification as well as the application of voiceprint verification in judicial field are described in detail.Furthermore,the main principle and specific operative process are introduced and on this basis,the uniqueness of voice print is demonstrated by experiment.Secondly,two hot issues in the field of voiceprint verification are discussed in this study:intersession and multi-speaker speech.The classic GMM-UBM speaker verification system is addressed.In addition,we elaborate the GMM-SVM speaker verification system as well as i-vector model based speaker verification system which is very popular used recently.The basic principle of channel compensation algorithm named PLDA is also described in this study.Finally,experimental comparisons between co-channel and cross-channel are conducted through the corpus of social security audio.Moreover,the segmentation and clustering technique for speakers is further studied and some popular segmentation and clustering techniques are described,Related experiments are conducted subsequently.Finally,we address the background,detailed process of system development and functions of intelligent voiceprint verification system. |
