基于TMS320 VC5402的语音检测器

Speech Signal Detector Based on TMS320 VC5402

本文介绍的语音检测器以DSP芯片TMS32 0VC5 40 2为核心 ,对短波电台接收到的信号进行分析和处理。数字语音信号采用串行输入 /输出方式 ,语音检测算法则采用对语音信号进行降噪处理后 ,再进行短时平均幅度差和短时能量计算的方法。该语音检测器的电路简洁小巧 。

A speech signal detector based on the digital signal processor TMS320VC5402 is proposed in this paper.The main function of this detector is to analyze the signal received by the short-wave communication system and process it.The digital signal processor inputs and ontputs the signal in serial manner,and the whole detection process is implemented through 3 steps.First the original speech signal is extracted from the noisy speech signals.Then the short-time average magnitude difference function (AMDF)and short-time energy of current signal are calculated.Finally whether the current signal is classified into speech signal or not is decided by the result we get in the 2nd step.The circuit of this speech signal detector is simple and it is shown that it can achieve very high detection accuracy.