基于Avalon总线的音频频谱分析系统设计与实现  

Design and Implementation of Audio Frequency Spectrum Analysis System Based on Avalon Bus

作　　者：姚梦茹 胡永兵 李慧 YAO Meng-ru;HU Yong-bing;LI Hui(Key Laboratory of Intelligent Computing & Signal Processing of Ministry of Education,Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学计算智能与信号处理教育部重点实验室,安徽合肥230601

出　　处：《计算机技术与发展》2019年第3期169-172,共4页Computer Technology and Development

基　　金：国家自然科学基金(61272317)

摘　　要：伴随电子与通信技术的发展,数字音频广播、多媒体通信等这些数字音频处理技术在社会上得到了广泛的应用,同时对人们生活的影响日益深远。目前市面上的多数调音器都是使用振动原理的,一些高端的调音器会同时使用声音原理和振动原理配合调音。市面上的乐器声音识别调音器虽然小巧便携,但是在准确性上有待提高,而且现有的调音器的种类比较少。为了提高识别准确率,使识别设备微型化,基于FPGA中的Avalon总线技术和快速傅里叶变换算法,设计实现了一种实时高效的音频频谱分析系统。该系统实时完成了各种音乐信号的识别与分析,克服了传统调音器的限制,可以对多种乐器进行调音,大大提高了乐器的音准,克服了一种调音器只能调节一种乐器的限制,并且提高了调音器的使用率。With the development of electronic and communication technology,the digital audio processing technologies such as digital audio broadcasting and multimedia communication have been widely used in society and increasingly profound impact on people’s lives. Currently,most tuners on the market use the principle of vibration, and some high-end tuners will use the sound principle and vibration principle to coordinate the tuning.The instruments on the market are small and portable,but they need to be improved in accuracy,and there are fewer existing tuners.In order to improve the recognition accuracy and make recognition device miniaturized,based on the Avalon bus technology in FPGA and the fast Fourier transform,we design and implement a real-time and efficient audio spectrum analysis system. This system can complete real-time identification and analysis for a variety of music signal,overcoming the limitation of the traditional tuner,tuning the many kinds of musical instruments,which can greatly improve the intonation of the instrument and overcome the limit of a tuner only adjusting a musical instrument,with improvement of the efficiency of the tuner.

关 键 词：FPGA NIOS Ⅱ系统 AVALON总线 频谱分析 快速傅里叶变换 

分 类 号：TN919[电子电信—通信与信息系统]