Technical discussions related to Audio Signal Processing (digital effects, acoustics, noise reduction, musical signal processing, etc).
Search Results for "iir"
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itza...@yahoo.co.in - Sep 20 2007
I have designed a FIR filter which has 60 DB SNR.Also I designed IIR filter at 60 DB SNR. FIR taps is around 700 whereas IIR is 12.
So I want to design IIR.But I want li...
Rajmathi S - Jan 10 2010
1. Why we choose IIR filter design for practical application, especially for processing audio signal?
We can design an IIR Filter of far less order than an FIR f...
keta...@gmail.com - Sep 5 2006
Help needed in designing chirp generator and pulse compressor using iir filters (this amounts to using an IDT, I guess).
I want to generate chirp using an IIR filter.
gordon_ao - Jun 5 2004
A simple question actually. Just found an issue with IIR low pass
filter in decimation low pass after the SINC filter in a Sigma Delta
A/D system. The one bit inp...
ramm...@ymail.com - Jan 9 2010
I'm new in dsp field.Just a fresher working for Audio product based company.
i have some queries please help me.
1. why we choose IIR filter design,for practical applica...
kssubrahmanya - May 6 2005
what are the effects of using IIR filter on audio signal?.
Sameer Kibey - Jul 25 2003
I am interested in implementation of cascaded second order IIR filters. Do i
necessarily have to use a floating point DSP for this application? Any
serious drawback if a...
samu...@yahoo.com - Jan 8 2010
I have just designed an IIR filter in Matlab and I need to implement it in a dsPIC, but I think there is some mistakes in my implementing procedure! I have a 4th order filter ...
daro...@yahoo.fr - Sep 1 2008
I have little experience with time filtering ,ad i'd very much appreciate some input. So here's the deal:
I'm trying to enhance audio with some non-linear processing
stefanosorrentino - Nov 28 2002
I have an apparently unsolvable problem:
I have a given IIR filter (they give me the poles and the zeros).
The filter was originally sampled at a given (very high...
care...@rediffmail.com - Mar 3 2005
Topic : To design an IIR HPF filter using IPP(Intel Integrated Performance
Current need: to calculate BW or Q from slope.
The specification of filter is :...
gordon_ao - Jan 24 2005
At the moment I am trying to design a one pole simple IIR digital
filter to simulate exponential delay effect with simple equations
like 1 - e^(-t/T), where T i...
dn...@newelltech.com - May 14 2007
I'm implementing a DTMF detector using the Goertzel Algorithm.
I have raw simulations built using Excel (I know...) and am getting some interesting results.
I don't see a lot o...
Carsten Borg - Jan 3 2001
I'm implementing a resampling (decimation) filter on a fixed-point platform
(c54x) as a cascade of second-order-section IIR filters. Unfortunately my
implementation is very sens...
gordon_ao - Sep 11 2003
I would really appreciate your insight in terms of how to design
digital filters to match both magnitude and phase of a narrow band
complex Analog gain(simple 1s...
David Reaves - May 14 2009
Given enough coefficients, FIR filters can replicate just about ANY
But, when creating banks of octave-related (or 1/3 octave) filters,
IIR filters are more ...
akin...@hotmail.com - May 5 2008
I want build a multiband ( 10 band) 2-channel audio equalizer with FIR or IIR filters. Can you suggest any sample project or ready library for that purpose ?
akin...@hotmail.com - Apr 20 2008
I want to build a multiband equalizer. I know that I must create bandpass filters for that aim.
So should they be FIR or IIR filters and why ?
Is there any sampl...
akin...@hotmail.com - Apr 23 2008
I am using some FIR and IIR filters. I use coefficients from Dsptutor's java applets. First of all , have you ever experienced Dpstutor's designs on projects ?
I am us...
hank...@in.waw.pl - Apr 8 2005
My previous post was not submitted, so I decided to write it again.
I'm supposed to design a bandpass filter bank (octave and 1/3-octave) for audio measurements ...
ramm...@ymail.com - Jan 28 2010
Thanks to all who ever respond to my previous queries.
I want the technical counterpart or derivation regarding 5the slope of filter
1. why 1st order filters have a 20...
palm...@hotmail.com - Nov 26 2009
I need to make a 90Âș phase shifter for a digital crossover audio system.
I've heard something about Hilbert Transform but I would like to know if it is the best way to do a ...
Jeff Brower - Apr 19 2011
Audio equalizers are a complex subject. I know people who have spent chunks of their careers developing AEs with
better performance, with very low power consumption (su...
akin...@hotmail.com - Apr 20 2008
I want to implement my own audio equalizer.
First of all I create FIR& IIR bandpass filters but they process"doubl" or "float" samples. But I get sound samples as sh...
Curl - Oct 16 2001
My aim is to set up a howling detector (and canceller)
I tried an adaptive IIR notch filter (using LMS), but I have still problems with this system (due to harmonics freq...
palm...@hotmail.com - Dec 27 2009
I know, IIR allpass filters are used for phase equalization
Can anybody help me about how I can get the coeficients for a desired phase response?
fara...@yahoo.co.uk - Jul 12 2010
Unfortunately, the link doesn't work for me either. Anyway, I think I know
what your problem is.
The Wiener filter adaptively calculates the coefficients of a RIF or I...
Erik de Castro Lopo - Nov 29 2007
> Suppose you have H(z)=B(z)/A(z), the transfer function of a digital
> How do you calculate the ANALYTIC expression of the filter's impulse
normanrg - Feb 26 2004
Does anyone out there have experience or info in how to construct
fractional-octave bandwidth filters using FFTs? It does not seem to
be an accepted method, yet I cannot under...
Bernhard Holzmayer - Jun 21 2006
1st of all I'm using 512 taps on a 256 Samples Per Second signal. I
know I can eliminate the coefficients that are close to zero and still
get pretty much the same response...
Brett Carruthers - Apr 27 2006
I am currently using a digital 1000 point lowpass filter to extract
the envelope from an audio signal of which I have removed the
negative components (by using the ab...
Goh Kean Leong RBMA/ESD - Sep 2 2002
hi all forum yahoo group members,
I have few question regarding a type of IIR filter structure that name
as "kingsbury filter". This type of filter structure is claim to b...
Egler, Mark - Mar 7 2002
If you design a second-order low-pass Butterworth "analog-prototype" IIR filter, which just about any digital filter design package can ...
dgen...@engmail.uwaterloo.ca - Oct 29 2007
I'm designing a parametric equalizer using a spartan 3e starter board and a TI PCM codec I wired to it, running at 48kHz. I decided to use the biquad IIR filter core from opencore...
THEOPHILUS MEDEIROS - Jan 28 2005
I thought of using adaptive filtering, but since it's a pahse coerrection. It might not be that easy. I plan on doing this using offline filtering. I just have to calibrate...
kt...@am3d.com - Mar 29 2009
I am comparing coefficient quantization errors for second order IIR filter structures (for fixed point implementation). I have found the Chamberlin state variable structure to...
Jeff Brower - Mar 3 2008
> The advantage of the parallel architecture is that it will give you the same filter combining response as an analog
> graphic EQ; that is, adjacent filters will inter...
Amaresh patil - Apr 28 2006
The format of the data needs careful selection. it is not strainght. I would suggest you to first find out the max and min value of delay output data format and current o...
Grzegorz Kraszewski - Dec 15 2005
> Please, can anybody tell how can I remove the hiss noise from the
> interpolated audio signal? Here, I am simulating the interpolation using
> c-program a...
Bernhard Holzmayer - Oct 2 2006
On Tuesday 26 September 2006 07:09, williamluisterry wrote:
> Hi. I've working with al TMS320C613 DSK building some guitar effects.
> I was suscesfully whit all of these but I ...