【作者】 张京涛； 黄亮； 刘润生；

【Author】 ZHANG Jing-tao~1,HUANG Liang~2,LIU Run-sheng~1 (1.Department of Electronic Engineering,Tsinghua University,Beijing 100084,China; 2.Department of Electrical Engineering and Applied Electronic Technology,Tsinghua University,Beijing 100084,China)

【机构】 清华大学电子工程系； 清华大学电机工程与应用电子技术系；

【摘要】 当前的普通车载免提通话系统大多只具备回声消除功能,为了对其功能加以扩展,本文提出了一个具有语音拨号功能的车载免提通信系统方案。该系统以语音信号处理专用芯片UniSpeech作为核心,采用超循环结构的软件构架以满足系统的准实时性操作需求。在该系统上实现了语音识别和回声消除功能,并且针对实际的车内噪声情况对算法进行了相应的改进。与传统方法相比,语音识别的速度与鲁棒性均有较明显的进步,在抗噪性能方面也有了一定的提高。更多还原

【Abstract】 Most of normal Car Kit systems only provide echo cancellation function.To extend the application area of these normal Car Kits,a design for speech dialing Car Kit system is introduced.This system is based on the speech SOC UniSpeech and contains a super-loop structured software to meet the pseudo real-time requirement.According to the acoustic characteristic in cars,the speech recognition and echo cancellation algorithm are modified to improve the speed and robustness of speech recognition and restrain the influence of noise.更多还原