The filtering tag has no wiki summary.
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3answers
369 views
Can we have a Digital Anti Aliasing filter?
I am working on a board that has no antialisaing filter at the input of the ADC. I have option to I implement my own filter using RC + Opamp circuit. But is it also possible to implement Anti ...
2
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1answer
88 views
Is it not possible to perform non-linear filtering in frequency domain?
This link contains the following statement:
In contrast to the frequency domain, it is possible to implement non-linear filters in the spatial domain. In this case, the summations in the ...
1
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3answers
53 views
Other techniques like overlap save/overlap add
I know overlap save and overlap add are used for long data sequence filtering. Are there any other similar or better techniques like these?
1
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1answer
41 views
How to apply convolution on a buffer
I'm trying to do some simple filtering for an audio signal using a window-sinc low pass filter. Supposing that my buffer has M values and the filter kernel size is N, after convolving these two arrays ...
3
votes
1answer
102 views
Frequency response of Low pass filter and High pass filter
The transfer function of a Low pass filter is H(w). From this I want to develop a high Pass filter. I read in DSP by Proakis, Sec 4.5, that the high pass filter can be obtained by translating H(w) by ...
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2answers
119 views
Strange noises when filtering audio signal
I am using Naudio open source library and I am trying to do some simple filtering. The problem is that I hear some "clicks", not too loud. The library offers me the possibility to use at least two ...
3
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2answers
161 views
How do convolutions become matrix multiplications?
I know this question may not be very relevant to programming, but if I don't understand the theory behind image processing I'll never be able to implement something in practice.
If I got it right ...
4
votes
1answer
99 views
Approximating the frequency response of a median filter
A median filter is a non-linear and lossy process, so it doesn't have a closed form frequency response as would a FIR filter (say a box filter of the same length) in an LTI system.
But how closely ...
