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hi...
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 application,especially for
processing audio signal. 
2. Why not FIR?
3. Depending on the response there are many IIR filter(butterworth,bessel
etc).Is there any sub division for FIR?
4. What are the disadvantage of FIR filter design over IIR?

waiting for quick response
with regards
rammya

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hi...
>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 application,especially for
processing audio signal. 
>2. Why not FIR?
>3. Depending on the response there are many IIR filter(butterworth,bessel
etc).Is there any sub division for FIR?

THOSE FILTERS COME FROM THE ANALOG COUNTERPARTS, SO BY MEANS OF BILINEAR
TRANSFORM THEY BECOME IN AN IIR.

>4. What are the disadvantage of FIR filter design over IIR?
>
>waiting for quick response
>with regards
>rammya
TRY GOOGLE "IIR VS FIR"

Regards,
Pablo

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Hello Rammya,

The short answer is that IIR require less computing power. FIR are easier to
design and less prone to instability compared to IIR filters that are more
difficult to design and where poorly designed ones can suffer from stability
issues.

Hope that helps.

Regards,

Ryan Smyth

http://renegademinds.com/

From: a...@yahoogroups.com [mailto:a...@yahoogroups.com] On Behalf
Of r...@ymail.com
Sent: Saturday, January 09, 2010 1:10 PM
To: a...@yahoogroups.com
Subject: [audiodsp] FIR in audio processing

hi...
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 application,especially for
processing audio signal. 
2. Why not FIR?
3. Depending on the response there are many IIR filter(butterworth,bessel
etc).Is there any sub division for FIR?
4. What are the disadvantage of FIR filter design over IIR?

waiting for quick response
with regards
rammya

______________________________
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(You need to be a member of audiodsp -- send a blank email to audiodsp-subscribe@yahoogroups.com )

Rammya, you should probably acquaint yourself with the pluses and  
minuses of each filter type.

IIR filters use few resources, and are logarithmic in their rolloff,  
therefore 'musical' by nature. But they are not phase linear, and  
cannot easily be made to be particularly sharp in their cutoff  
characteristics. They can also be unstable.

FIR filters can conceivably be made to any shape, are inherently  
stable and can be made phase linear, but they are resource-hungry and  
not naturally 'musical,' since their rolloff is linear.

These are the basics. Any good book can tell you more than you want to  
know.

David Reaves
On Sat Jan 9, 2010 9:08 am ((PST)) "r...@ymail.com" wrote:
>
> hi...
> 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  
> application,especially for processing audio signal.
> 2. Why not FIR?
> 3. Depending on the response there are many IIR  
> filter(butterworth,bessel etc).Is there any sub division for FIR?
> 4. What are the disadvantage of FIR filter design over IIR?
>
> waiting for quick response
> with regards
> rammya

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(You need to be a member of audiodsp -- send a blank email to audiodsp-subscribe@yahoogroups.com )