Sign in

username:

password:



Not a member?

Search audiodsp



Search tips

Subscribe to audiodsp



audiodsp by Keywords

AAC | ADPCM | Convolution | DAFx | FFT | IIR | Mixer | MP3 | MPEG | MPEG-4

Sponsor

Industry's highest performing at the lowest power DSPs now as low as $5.00*
Start development today!
*volume pricing for 10ku

Discussion Groups

See Also

Embedded SystemsFPGAElectronics

Discussion Groups | Audio Signal Processing | Overflow in IIR filters

Technical discussions related to Audio Signal Processing (digital effects, acoustics, noise reduction, musical signal processing, etc).

  

Post a new Thread

Overflow in IIR filters - Carsten Borg - Jan 3 11:36:00 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 sensitive to overflow, unless I down-scale my input
signal quite a lot (and thereby loose a great deal of signal-to-noise
ratio). 
My question is as follows: Is there a specific second-order-section
implementation (Direct Form I, Direct Form II, Transposed DFII, Lattice,
etc.) which is less sensitive to overflow than my current DFII
implementation? 
Any suggestions will be welcomed, as well as links to informations sources
on the topic! 
Regards, 
Carsten
	---------------------------------------
Carsten Borg, M.Sc.EE.

Embedded Systems -
Digital Signal Processing

Oticon A/S
Strandvejen 58
DK-2900 Hellerup
Denmark

mailto:cbo@cbo@...
Tel: +45 39 17 71 00
Direct: +45 39 17 73 05
Fax: +45 39 27 79 00
http://www.oticon.com
---------------------------------------
______________________________
New Code Sharing Section now Live on DSPRelated.com. Learn about the Reward Program for Contributors here.



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