基于单片机控制的孤立词语音自动识别系统设计  

Design of isolated⁃word speech automatic recognition system based on SCM control

作　　者：周红锴[1] ZHOU Hongkai(Guilin University of Technology,Nanning 530001,China)

机构地区：[1]桂林理工大学,广西南宁530001

出　　处：《现代电子技术》2020年第18期64-66,70,共4页Modern Electronics Technique

基　　金：国家自然科学基金项目(61262075);广西自然科学基金项目(2018GXNSFBA281081);广西职业教育教学改革研究项目(GXGZJG2017A088);广西职业教育教学改革研究立项项目(GXGZJG2016A020)。

摘　　要：由于孤立词语音自动识别技术具有操作简便,方便日常生活的特点,因此该文设计基于单片机控制的孤立词语音自动识别系统。系统采用型号为SH86270主控单片机接收由SH69P848AM芯片控制的语音识别电路输出结果,通过A/D转换器得到离散数字语音信号,将孤立词语音信号转换为电信号,再经A/D转换器转换为数字信号后输入系统进行预处理。采用动态时间规整算法获取距离最短语音信息,得到孤立词语音识别结果。实验结果表明,该系统具有较好的声学相似性,可有效识别出测试的孤立词语音信号与标准信号的最小距离,识别率和滤除干扰率均很高,识别时间短,识别效果显著。As the isolated⁃word speech recognition technology has the characteristics of easy for operation and convenient for daily life,an isolated⁃word speech recognition system based on SCM(single chip microcomputer)control is designed.In the system,the SH86270 SCM is used to receive the output results of speech recognition circuit controlled by SH69P848AM chip,the discrete digital speech signal is obtained by A/D converter,and the isolated⁃word speech signal is converted into the electrical signal and then is converted into digital signal by A/D converter for inputting into the system for preprocessing.The speech information with the shortest distance is obtained by means of the dynamic time warping algorithm to gain the results of the isolated⁃word speech recognition.The experimental results show that the system has better acoustic similarity,can effectively recognize the minimum distance between the tested isolated⁃word speech signal and the standard signal,has high recognition rate,high interference filtering rate,short recognition time,and remarkable recognition effect.

关 键 词：孤立词语音识别 系统设计 电路设计 语音信号获取 信号转换 信号预处理 

分 类 号：TN876-34[电子电信—信息与通信工程] TU855[建筑科学]