现代电子技术Issue(13)：49-52,55,5.
基于ADPCM的数字语音存储与回放系统
Digital voice storage and replay system based on ADPCM
摘要
Abstract
With singlechip and FPGA as the cybernetics core,the system realizes voice storage and reply system. It can collect and simulate voice signals and stereo signals from earphone and lift utilization rate of memory by the use of ADPCM, which means the voice can be stored for more than 2 minutes. Based on the short⁃time Fourier transform principle,it can also achieve spectral analysis of voice signals and real⁃time display. Through using the stereo audio amplifier,each sound track can be adjusted and muted. Furthermore,some measures as pre⁃emphasis,de⁃emphasis and anti⁃aliasing filtering are used in this system to increase SNR efficiently and get good quality of the recorded voice for a longer time.关键词
语音存储与回放/ADPCM/短时傅里叶变换/FPGA控制Key words
voice storage and replay/ADPCM/short-time Fourier transform/FPGA control分类
信息技术与安全科学引用本文复制引用
..基于ADPCM的数字语音存储与回放系统[J].现代电子技术,2013,(13):49-52,55,5.基金项目
2012上海市重点科技攻关项目 （）
