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Visual Basic sample program for Discrete Fourier Transform

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Fourier Transformation is used to transform data in time domain to frequency domain and vice versa. The forward fourier transform or simply fourier transform is used for time domain to frequency domain transformation. Where as Inverse fourier transform is used for reverse process. Here you can find a visual basic sample program implementing fourier transform using correlation method.
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How Inpout32.dll works ?

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Tried the Inpout32.dll..? then Learn how Inpout32.dll does the things. This brief tutorial explains about the working of Inpout32.dll in simple steps, with the help of a flow chart. This could help you much if you want to modify the Inpout32 dll source code

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Windowed sinc filter

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 The windowed sinc filter uses the inverse fourier transform of ideal low - pass filter frequency response. The Inverse transform of the ideal low - pass response is the sinc function (sinx/x). The inverse fourier transform of the required frequency response is taken and used as kernel a normal filter.
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DSP tutorial

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This basic DSP tutorial will help you understand what is Digital Signal Processing, what a Digital Signal Processing System is made of and some theoretical matters like sampling theorem aliasing etc.. The DSP system components like Analog to Digital Converter, Digital to Analog Converter are also is introduced. remember this is for beginners..! not for veterans
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Digital filters

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An introductory tutorial about digital filters , one of the most important applications of DSP !. It explains about a basic digital filter system with a block diagram . Two sample programs written in visual basic also available. This programs will let you understand about digital filtering through visual graphs.

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