一种高识别率的语音密码锁

A Speech and Cipher Lock of High Accuracy of Recognition

采用基于统计模型的隐马尔可夫模型(hidden Markov model,HMM)来描述语音模型,进行语音模型库训练,并使用模板匹配的Viterbi算法进行语音识别,实现了以凌阳16位单片机SPCE061A为核心的语音密码锁系统,包括键盘模块、电源模块、门锁控制模块、LCD显示模块。该密码锁将语音密码和键盘密码技术相结合以保证系统安全性,通过测试,系统对特定人语音识别率为98%。

A speech and cipher lock based 16 - bit MCU SPCE061A of Sunplus is realized. It includes keyboard module, power module, lock controlling module and LCD displaying module. The speech model of the system, is developed based on the detailed analysis of hidden Markov model （ HMM ）. Viterbi searching algorithm is used as HMM speech recognition. The combination of speech recognition and keyboard cryptography is employed to guarantee the security of the system. The accuracy of recognition can reach 98%.