基于TMS320VC5509的基音周期实时检测系统的设计

Design of Pitch Period Real-time Detection System Based on TMS320VC5509

通过芯片TMS320VC5509和TLV320AIC23构建一个语音采集、数据处理的系统,实现了实时提取基音周期。在处理算法上,经过低通滤波之后对语音信号进行"三电平中心削波"处理,最后作自相关运算获取基音周期。实验结果表明,经过三电平中心削波能够很大程度地简化自相关函数的计算,从而有效和快速地提取基音周期。

TI＇s DSP chip TMS320VC5509 and codec chip TLV320AIC23 are used to build a voice acquisition and data processing system, which achieves real-time extraction of pitch. In the treatment algorithm, after low-pass filter on the voice signal and the three-level center clipping processing, the final auto-correlation function is used to get pitch. The experimental results show that the three-level center clipping can greatly simplify the calculation of auto-correlation function, so as to achieve effective and rapid extraction of pitch.