McBSP在语音信号处理中的应用与实现

McBSP Used in the Speech Processing and Its Realization

以语音处理中基本的A/D、D/A转换为例,采用TMS320C54x数字信号处理器的外围扩展芯片TLC320AD50作为语音采样信号的输入和处理后的语音信号的输出通道,给出了DSP与TLC320AD50的接口设计。详细介绍了TMS320C54x的多缓冲串口(McBSP)软硬件设计并提出如何用McBSP在语音通信中降低传输带宽,并提出了具体的设计思想和实现方法。通过使TLC320AD50工作在主方式,DSP工作在从方式,可以实现高速实时的A/D、D/A转换和实现处理后的语音信号低带宽传输。

This paper the essential A/D and D/A conversion in the speech processing is used as an example and adopt the external extended apparatus TLC320AD50 of the DSP TMS320C54x,which is a series of digital processor（DSP）, TI.C320AD50 is worked as channels for speech sampling signal input and speech signal output, This paper also intro duces how to use Multichannel Buffer Serial Port（McBSP） based on TMS320C54x, then Hardware configuration and software diagram are described. If set the TLC320AD50 in master mode, and the DSP work in subordinate mode, we can realize the high speed and real time A/D.D/A conversation,and the low bandwidth speech signal is received.