FPGA-based speech signal waves displayed on VGA screen

TAO Zhong-xing

doi:10.3788/YJYXS20163102.0185

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FPGA-based speech signal waves displayed on VGA screen

Display and Image | 更新时间：2020-08-12

- FPGA-based speech signal waves displayed on VGA screen
- Chinese Journal of Liquid Crystals and Displays Vol. 31, Issue 2, Pages: 185-192(2016)
- 作者机构：
  
  西北师范大学物理与电子工程学院,甘肃兰州,730070
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China(No.61263036);Northwest N
- DOI：10.3788/YJYXS20163102.0185
  CLC： TN873;TN912.3
- Received：14 April 2015，
  
  Revised：18 May 2015，
  
  Published：05 February 2016
- 稿件说明：
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陶中幸,. 基于FPGA的语音信号波形VGA显示方法[J]. 液晶与显示, 2016,31(2): 185-192

TAO Zhong-xing,. FPGA-based speech signal waves displayed on VGA screen[J]. , 2016,31(2): 185-192
陶中幸,. 基于FPGA的语音信号波形VGA显示方法[J]. 液晶与显示, 2016,31(2): 185-192 DOI： 10.3788/YJYXS20163102.0185.

TAO Zhong-xing,. FPGA-based speech signal waves displayed on VGA screen[J]. , 2016,31(2): 185-192 DOI： 10.3788/YJYXS20163102.0185.

摘要

在基于FPGA的语谱分析研究与设计中

需要将语音时域波形和语谱分析结果同时显示在VGA屏幕上

而采用一般方法只能在有限的VGA显示区域内显示局部波形

无法将完整的一段语音信号波形显示出来。针对这一问题

提出了一种适合FPGA实现的语音信号波形VGA显示方法。该方法通过分析语音信号的波形特点

以及显示中存在的波形放大、波形缩小两个问题

提出线性插值和保留极值的解决方法

并详细探讨了这两种方法的FPGA硬件实现结构。实验结果表明

该方法能够有效地对语音信号进行正确显示。

Abstract

The speech time-domain waveform and spectrogram analysis results displayed simultaneously on the VGA screen are required in the research and design of spectrogram based on FPGA

by general method

only parts of the waveforms can be displayed in the limited VGA display area

and failed to display complete speech signal waveform. To solve this problem

a method suitable to display VGA speech signal waveform based on FPGA implementation is presented in this paper. By analyzing the speech signal wave characteristic and the problems of waveform zooming in/out in the waveform display

we proposed the solution of linear interpolation and keep-extremum method

and discussed the FPGA implementation structure of the two methods in detail. Experiments show that speech signal can be displayed properly by the method.

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Keywords

references

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