基于环形麦克风阵列的远场语音识别系统

摘要

In the far-field speech recognition process,with the increase of distance of speech transmission,it arises the problems,such as voice attenuation,reverberation,background noise,human interference and echo increase,etc.These problems make the speech recognition distance and rate low.According to these problems,this paper presents a solution,which is a far-field speech recognition system based on circular microphone-array.The design adopts SinoVoice company loop layout pansy speech front-end processing as the core,combined with the corresponding off-line speech recognition engine and single chip microcomputer.The design is used in the control system of service robot of speech movements.Under non specific consideration of the noise environment with different distance and different angles,fire echo speech recognition tests are carried out.The results showed that under noise environment,the system for remote command also has a higher recognition rate and can echo cancellation,can be used in the application environment of service robots,is also suitable for other environmental noise in the far field of speech recognition system application.%语音在远场识别中,随着语音传播距离的加大,语音本身的衰减,混响、背景噪音、人声干扰和回声加大等技术难题,会引起的识别距离近、识别率低等问题.针对这些问题,提出了一种基于环形麦克风阵列的远场语音识别系统.该设计采用SinoVoice公司环形布局的pansy板作为语音前端处理的核心,结合其相应的离线语音识别引擎以及单片机,运用于服务机器人的语音动作控制系统中.经在噪声环境下的非特定的不同距离、不同角度、消回声的语音识别测试,结果表明在噪声环境下,该系统对远距离命令也有较高的识别率,并且可以消除回声,适用于服务机器人的应用环境,也适合其他有噪环境下远场语音识别系统的应用.