dss91
Junior Member level 2
Hello Audio Experts and aspirants,
First of all i will try to put my agenda of my system:
>capture of ubiquitous speech of a area under surveillance and further transfer it to a RF module that's it
In that event i have chosen to use a stereo codec chip from TI - AIC3204 which has inbuilt programmable IIR Bi-quad Filter having a transfer function as shown below
i have five such Biquad Blocks through which using 2 i can make out a Band Pass Filter (200-3800) while speech being captured at a sampling rate of 8000 samples / sec,More over the coefficient is a 2s complemented 24 bit value
now my problem is how to find out the above coefficients of the bi-quad blocks (i dont want to use any ready made calculators as one such called TIBQ calculator as i want a subjective approach towards my task)
neither i have found a solution from matlab or any simulators
what do you say do any of have got a approach to find out Bi quad Filter Coefficients
First of all i will try to put my agenda of my system:
>capture of ubiquitous speech of a area under surveillance and further transfer it to a RF module that's it
In that event i have chosen to use a stereo codec chip from TI - AIC3204 which has inbuilt programmable IIR Bi-quad Filter having a transfer function as shown below
Code:
N0 + (2* N1 * z^-1 ) + (N2 * z^-2)
H(z)=---------------------------------------------
(2^23) - (D1 * z^-1) - (D2 * z^-2)i have five such Biquad Blocks through which using 2 i can make out a Band Pass Filter (200-3800) while speech being captured at a sampling rate of 8000 samples / sec,More over the coefficient is a 2s complemented 24 bit value
now my problem is how to find out the above coefficients of the bi-quad blocks (i dont want to use any ready made calculators as one such called TIBQ calculator as i want a subjective approach towards my task)
neither i have found a solution from matlab or any simulators
what do you say do any of have got a approach to find out Bi quad Filter Coefficients