| 摘要: |
| 本文介绍的语音检测器以DSP芯片TMS320VC5402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，语音检测准确度高。 |
| 关键词: 数字信号处理器 语音检测器 DSP芯片 TMS320VC5402 |
| DOI：10.3969/j.issn.1001-893X. |
| 修订日期：2001-08-27 |
| 基金项目: |
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| Speech Signal Detector Based on TMS320VC5402 |
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| Abstract: |
| 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. |
| Key words: Short-wave radio,Signal processing,Speech signal detection,DSP chip, |
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