基于ARM的音频频谱显示器的设计  

Design of audio spectrum display based on ARM

作　　者：段丽娜[1] 

机构地区：[1]华中科技大学武昌分校,湖北武汉430064

出　　处：《微型机与应用》2014年第1期22-24,共3页Microcomputer & Its Applications

摘　　要：详细介绍了一种基于ARM的音频频谱显示系统的实现,整个音频显示系统包括音频信号采集、音频信号处理以及音频信号转换后的显示等功能。在设计中综合了声音采集、ARM技术及FFT算法,构建了一个实时采集的频谱显示系统,可以应用于各种需要对声音进行采集和分析的场合。其中,硬件系统主要包括声音信号的采集与处理、最小系统、电源和显示模块;而软件系统则是将ADC转换的数据通过FFT算法后显示在LCM12864显示器上。测试结果表明,该系统具有较好的实时性和准确性。The paper introduces an implementation of the audio spectrum display system based on ARM in detail. The audio display system includes an audio signal acquisition, the audio signal processing and the audio signal display after conversion. In the design, a combination of sound collection, ARM technology and FFT algorithm build a real-time acquisition of spectrum display system, which can be applied to a variety of occasion in which sound capture and analyze are needed. The hardware system mainly includes the sound signal acquisition and processing, the smallest system, power supply and display module. The software system is to make the ADC conversion data display on LCM12864 after FFT algorithm. Test results show that the system has good real-time performance and accuracy.

关 键 词：音频 频谱显示 FFT ARM 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构] TN912.3[自动化与计算机技术—计算机科学与技术]