Research And Implementation Of Authentication Technology Based On Voiceprint Recognition

The technology of Identity Authentication has become research hotspot in the industry and academic field. As a combination of voice processing and information security technology, The technology of Identity Authentication based on voiceprint feature has gained a lot of research fruit. At the same time, it exposed lots of drawbacks: first of all, how to extract stable personal characteristic information as much as possible from voice; secondly, how to improve training method to get better model according to existing feature; thirdly, how to use the voiceprint feature in mobile environment. Aiming at these shortages, this paper research the key technology of Identity Authentication based on voiceprint feature. VoiceID, an identity authentication based on voiceprint feature system is also achieved.Main contribution the author made in this paper can be concluded as follows:1) a improved algorithm of initial codebook generating is proposed according to the shortage of Low-Efficiency codebook generation of traditional Vector Quantization algorithm.2) FNS(Fast Nearest Search), a fast code word search algorithm is given based on the theory that features between code words can improve the speed of code word search markedly.3) VoiceID, a Identity Authentication platform is implemented, which supports the voice login in mobile environment.The research fruit of this paper is used to infoTrust, a enterprise digital right protection system based on mobile work flow. VoiceID could improve the security and secrecy of different level of user accounts of enterprise and provide a voice lock for the important information of enterprise in practice.