信号处理系列导航，如：用短时傅里叶变换进行声音处理,Signal processing series of navigation, such as: use of short-time Fourier transform for audio processing

本设计采用TMS320F28234 DSP芯片，设计了一台音频频率数字扫频仪。系统由扫频信号产生及调理模块、帯阻网络模块、幅频特性测试模块、数字幅频均衡模块以及人机交互模块组成。扫频信号由DSP内部PWM模块产生经外部有源低通滤波器进入带阻网络。应用数字信号处理技术在 DSP内部实现幅频特性测试，测试结果通过DSP的SCI在电脑显示器上显示，幅频均衡部分利用利用Matlab和基本部分中测得的陷波特性得出均衡算法中的滤波器的系数和阶数，然后在DSP内部对帯阻网络实现了均衡，完成了要求的各项指标。-

Signal Processing is the process of measuring, manipulating or analysing information. Signals of interest include biomedical data, audio, still or moving images, radar, and even DNA. Filtering techniques can be crucial in revealing and interpreting

As general-purpose computers became faster, they started to take over the role of dedicated hardware for all but the most specialized and computer-intensive operations. With the fast computers and signal processors available in the digital image proc