摘要
文中针对数字化音频处理中声音均衡和频谱显示的问题,提出了采用FFT算法的设计方案和具体实现。在介绍FFT算法基本原理的基础上,比较深入地分析其特点,采用FFT算法使时域上表现的声音信号转化为频域信号,分别对各频段处理后,再次由FFT转化回时域,完成声音信号均衡和频谱显示等功能,并给出了具体的实现方案。通过对均衡和频谱显示的处理,总结出对声音信号频率的处理,均可采用时域到频域再回到时域的通用方案。数字化音频处理,是未来音频处理的发展的主要方向。
This article, in accordance with the problem of sound equilibrium and spectrum display in digital audio frequency processing, puts forward the design and realization of Fast Fourier Transform algorithm. Based on the basic principle of Fast Fourier Transform algorithm, the paper analyzes its trait deeply, By using Fast Fourier Transform algorithm, the sound signal in time domain is transformed into frequency field signal field,after the process or each frequency segment, it is transformed again into time field by using Fast Fourier Transform algorithm, thus achieving the functions of sound signal equilibrium and frequency display, and this paper gives the realization scheme. Through the processing on equilibrium and spectrum display, the conclusion is drawn that,the sound signal frequency can be realized by the common scheme, that is, from time domain to frequency domain,then from frequency domain to time domain. Digital audio frequency processing is the main direction of future audio frequency processing.
出处
《通信技术》
2008年第7期250-251,共2页
Communications Technology
关键词
快速傅立叶变换
声音均衡
频谱
fast Fourier transform
digital signal processor
EQ
spectrum
