Date: Dec 12, 2012 8:56 PM
Author: lady firmament
Subject: zero phase digital filtering

Hi 
Dear all.
I wanna know about zero phase digital filtering.
y=filtfilt(b,a,x)
what does it means b and a. how can i choose its parameter.
what is numerator and denominator coefficients b and a respectively?
And i chose a=1 and b=1 but the system didn't work.
Please kindly