Short Time Processing Methods

[walderr]

Has anyone ever come across Short Time Processing methods? I would like to look into Short Time Energy Function, Short Time Average Zero Crossing Rate and Median Smoothing. I don't know a lot about them, but don't want to get too deep in before I find out it's going to be a nightmare to work on! I'm not sure if the STFT Spectogram.vi will help me, or whether that's something different. Thanks.

[Jyoti F]

Hello,

The Short-Time Fourier Transform (STFT) allows you to analyze a signal in the time and frequency domain simultaneously, which allows you to better understand and process a signal. The STFT Spectogram.vi is available within the Signal Processing Toolset. For a better understanding of STFT or Joint Time Frequency Analysis (JTFA) take a look at the following knowledge bases:

http://zone.ni.com/devzone/conceptd.nsf/webmain/0A3D35A85FC7D2EA862568D2004A966F?opendocument
http://zone.ni.com/devzone/conceptd.nsf/webmain/53EB764F16B52B1C862568F8004EEA84?opendocument

The Signal Processing Toolset User Manual (http://digital.ni.com/manuals.nsf/websearch/C355A4DB4B3DFAE086256A6A006A9170?OpenDocument&node=132100_US) is also very helpful.

Regards,
Jy
oti F
National Instruments