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2 votes
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Audio EQ Cookbook Stability

Do I need to be concerned about stability? Yes, but not for the reasons you think (we'll get to this). Or are the coefficients that come out guaranteed to keep all poles inside the unit circle? Yes,...
Hilmar's user avatar
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3 votes
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low shelving filter frequency response diagnosis

Your filter coefficients and your difference equation are wrong. You assumed that the output signal $y[n]$ is fed back to the input, but what is actually fed back is the signal before the multiplier $...
Matt L.'s user avatar
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0 votes

How to design IIR digital filters?

Despite previous commenters decrying the design method, I found an interesting online tool at https://www.micromodeler.com which satisfies the questioner's requirement of manual placement of poles &...
Nigel Winterbottom's user avatar
0 votes

Fixed point number scheme IIR filter with ADC

Fixed point processing especially for IIR filters is quite complicated. The main challenges are Make sure you don't overflow or clip for all filter coefficients and signal types. Make sure you end up ...
Hilmar's user avatar
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0 votes

Fixed point number scheme IIR filter with ADC

As far as I know now, most ADC and DAC chips communicate to their CPU or DSP chip over a serial protocol with 3 wires (word/frame clock, bit clock, data) and the data is represented as a twos-...
robert bristow-johnson's user avatar
2 votes
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Allpass Filter with Sign Switch

In this answer I'll just focus on the given design problem, even though I'm not sure if there might be a better overall solution to your underlying problem. First of all it's instructive to realize ...
Matt L.'s user avatar
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1 vote

Implementation of Deriche filter

Let's assume $\boldsymbol{b}$ stands for gaussian blur and $\boldsymbol{s}$ for Sobel filter. With $\boldsymbol{I}$ being the input image we have the 2 first steps of Canny Edge Detector as: $$ \...
Royi's user avatar
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