New answers tagged lowpass-filter
2
votes
Scenarios where Phase Response is (non-)problematic
One audio example: The human ear is quite insensitive to monaural phase but quite very sensitive to interaural phase.
Let's make a stereo signal by simply duplicating a mono signal. If you apply a (...
- 37.8k
2
votes
Scenarios where Phase Response is (non-)problematic
Divide the filter's frequency response in two parts: a passband (the portion of the input that should be present in the output), and a stopband (the portion of the input that should be rejected).
In ...
- 14.4k
2
votes
Accepted
Frequency components in Bin averaging
@MarcusMuller already answered in his comment, but I'll elaborate a little.
In one approach, you're applying a moving average filter. That's
perfectly fine.
In your other approach, your decimating ...
- 3,455
0
votes
Accepted
Output Precision for Filter
The log2 computation is really a consideration for the size of the (extended precision) accumulator for a fixed point FIR filter design:
The sum of the absolute value of the coefficients is the ...
- 43.4k
0
votes
Output Precision for Filter
You should look at the sum of the magnitude of the coefficients, if
what you mean log2(sum(abs(LPF_COEFF))) = 17.87 then we know that
$$\begin{eqnarray}
\left|\sum ...
- 1,901
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Subtract Lowpass from Wire to Get Allpass
Let APF $A(z)$ be $$ A(z) = \frac{z^{-N} + a_1z^{1-N} + ... + a_{N-1}z^{-1} + a_N}{1 + a_1z^{-1} + ... + a_{N-1}z^{1-N} + a_Nz^{-N}} $$
Then define your complementary filter as $$\begin{align}
H(z) &...
- 18.1k
2
votes
Accepted
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