Thanks so far for the different proposals.
I must admit that I do not have much skills with Matlab.
And it seems the proposals require all steep learning curve.
Maybe the problem I like to solve can be described with an example:
Let's assume a series of two biquad peaking filters, first with
There is no simple method that I've ever heard of, but I think this problem
is a good candidate to be solved as an optimization problem. I actually
wrote some MATLAB scripts some time ago to design a filterbank based on a
cascade of biquads without needing to use anything fancier than the fmincon
On 3/4/14 9:37 AM, Theo Verelst wrote:
Ross Bencina wrote:
Since people are throwing out random suggestions, ...
I have not made any random suggestions thus far. Undergrad univ. EEs
can recognize easily (if they're a bit good and are in a proper
eduction institute) what I've mentioned here.
On 3/4/14 11:05 AM, Theo Verelst wrote:
robert bristow-johnson wrote:
On 3/4/14 9:37 AM, Theo Verelst wrote:
Ross Bencina wrote:
Since people are throwing out random suggestions, ...
I have not made any random suggestions thus far. Undergrad univ. EEs
can recognize easily (if they're a bit
theo verelst wrote:
I didn't get the part where the frequency response is a given, I mean, how
is that given (and where does that come from). And if indeed a certain
response is to be implemented as a digital filter, why does phase not
matter, too ?
Assume a frequency response of a speaker
On 3/4/14 11:19 AM, Theo Verelst wrote:
robert bristow-johnson wrote:
You put probes in the ground, set of a bar of dynamite, and measure
the seismic response. Then take a lot of assumptions, and try to
invert those measurments into a soil sediment picture, as to find
oil...
still
Hello Greg,
I've unsuccessfully tried to find more about FDLS.
Can you please give me a tip or even send me some info by PM?
- Uli
2014-03-04 17:37 GMT+01:00 gjberc...@charter.net:
On Tue, 04 Mar 2014 11:28:37 -0500, robert bristow-johnson wrote:
as far as i know there is the prony method.
Negative coefficients are like a negative correlation. I say like,
because PCA gives you vectors of associated variables along which the
variance in the data is decomposed. That's not exactly the same as
correlation. The other part to pay attention is the eigenvalues. The
largest components
On Mar 4, 2014 1:16 AM, Linda Seltzer lselt...@alumni.caltech.edu wrote:
And when some components have very small absolute
values does that mean they can be omitted in an image of the component?
Linda Seltzer
Small values should not be simply omitted. It's sort of an effect size
Mike wrote:
You could try pretending they're Gaussian shaped (and then translate the
sigma to Q),
What's they in the comparison, I mean are we talking Frequency Domain
here, where a band filters characteristic pass band curve is to be
replaced by a statistics integral ? Doesn't make much sense to
Seems to me that you could just reformulate an EM algorithm to work
directly on the actual (magnitude) responses of the biquad stages, and so
bypass the step of converting from a Gaussian response to the actual biquad
response (along with its attendant error). The only obvious wrinkle that
occurs
On 3/4/14 11:53 AM, Ethan Duni wrote:
LDS, LSD... you do the math...
ya. too much of the latter for me, i'm afraid.
i've risked death on it.
on my motorcycle in the '80s.
On 5/03/2014 7:56 AM, Ethan Duni wrote:
Seems like somebody somewhere should have already thought
through the problem of matching a single biquad stage to an arbitrary
frequency response - anybody?
Pretty sure that the oft-cited Knud Bank Christensen paper does LMS fit
of a biquad over an
On 2014-03-05, Ross Bencina wrote:
Pretty sure that the oft-cited Knud Bank Christensen paper does LMS
fit of a biquad over an arbitrary sampled frequency response.
If not, then Serra and the rest of the FOF folks did implementations
where formants were implemented with fitted biquads.
On 5/03/2014 2:27 PM, Sampo Syreeni wrote:
Pretty sure that literature has to contain the relevant algorithms if
used with just a single resonance.
I never looked at rational function fitting, but this would be easy
enough to try:
http://www.mathworks.com.au/help/rf/rationalfit.html
The
On Mar 3, 2014, at 8:14 AM, Marco Lo Monaco marco.lomon...@teletu.it wrote:
Hello jerry,
Klippel is one of the most experienced in the field and I believe that
looking thru his literature (papers) you will find a lot of inspiration.
Yes, I thought to look at Klippel's web site, and indeed
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