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Application of Digital filters.

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RITESH KAKKAR

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Hello,
What is the wide application of Digital filters are they used in computer?
 

Digital filters are mostly used in digital communication systems. I don't know what you mean by their usage in computers.
Baseband (I/Q) signals in DSP/FPGA are filtered by digital filters.
 

Hi,

digital audio processing. Oversampling filters, sound control, echo, surround sound.

Measurement: medizine: ECG, supersonic....

Image processing, Digital video, picture processing,

Communication: voice, data...

Control loops, PID...


Klaus
 

In a computer, in particular, would be used in the sound cards to provide antialiasing, decimation, and equalization.
 

Analog memory? That certainly isn't anything that has any mainstream practical examples. There are few things around that have tried to be analog-ish, with multi-leveled voltages storage of bits to increase the bit storage capacity of a single cap, but this is still more digital-ish than analog-ish.
 

RITESH KAKKAR said:
can we store i mean is there any analog memory also?
Click to expand...

The only thing that we could barely call as "analog memory" is the switched capacitors on CCD sensors, but it isn't possible to do anything else than serially shift their content.
 

ok, there two types finite impulse response and infinite impulse response what it is in real?
 

Hi,

In general..
* IIR has feedback...you can build similar filters like in analog
* FIR has no feedback

But there are a lot of digital filter topologies..like biquad

Klaus
 

Hi,

how to know which one application is IIR and FIr
Click to expand...
The developing engineeer decides.

It depends.
* with an IIR: you get phase shift. It is a continous (steady?) phase and amplitude behaviour.
* with FIR: you may create filters without phase shift (but fixed delay). They often need more processing power and more ram usage.

There are so many other things that differ. Each filter has it´s advantages and disadvantages..

Klaus
 
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