| 基于TMS320VC5509的基音周期实时检测系统的设计 |
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| 引用本文： | 贾亮,危国腾,赵鹏飞.基于TMS320VC5509的基音周期实时检测系统的设计[J].电声技术,2010,34(2):56-58,62. |
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| 作者姓名： | 贾亮 危国腾 赵鹏飞 |
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| 作者单位： | 沈阳航空工业学院,电子信息工程学院,辽宁,沈阳,110136 |
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| 摘 要： | 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。
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| 关 键 词： | TLV320AIC23芯片 低通滤波 三电平中心削波 基音周期 |
Design of Pitch Period Real-time Detection System Based on TMS320VC5509 |
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| JIA Liang,WEI Guo-teng,ZHAO Peng-fei.Design of Pitch Period Real-time Detection System Based on TMS320VC5509[J].Audio Engineering,2010,34(2):56-58,62. |
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| Authors: | JIA Liang WEI Guo-teng ZHAO Peng-fei |
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| Affiliation: | Shenyang Institute of Aeronautical Engineering;Shenyang 110136;China |
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| Abstract: | 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. |
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| Keywords: | TLV320AIC23 chip low-pass filter three-level center clipping pitch period |
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