摘要
本文介绍了一个实时、有效的话者自动验证系统,重点对话者验证的机理进行了分析,并对与验证系统有关的几个主要问题作了简要的说明。该系统的主要特点是:选择了最能反映话者特征的基音和第二、三共振峰频率及其时变特性作为特征参数,有效地保证了系统验证的正确率;硬件上采用了以高速处理芯片C25作成的语音处理板,保证了话者验证中大量的计算工作的实时性;结构上将语音处理板作成PC机的插板形式,用户能通过PC机的友好人机接口对其实施各种有效的管理。目前该系统已在PC机上试制成功,初步测试表明达到了研制要求。
This paper presents a real time and efficient automatic speaker verification system, specially analyses the verification mechanism, briefly elucidates other main problems in verification.The leading features of this system are as follows, The pitch, formant 2, formant 3 and their timing characteristics are chosen as the system parameters, which are well able to reflect the speaher’s characteristics and ensure the verification’s correctness rate. A high speed TMS320C25 DSP chip is used to forming a speech processing card, which carries out a large amount of computations guickly. This card is put in the IBM PC microcomputer, so that the user can effectively supervise it by a friendly man-machine interface.This system has been developed. A preliminary test shows that it is satisfactory.
关键词
话者识别
话者验证
语音信号数字处理
特征选择
动态时间弯折
speaker recognition
speaker verification
digital processing of speech signals
feature selection
dynamic time warping
