> i) we hav recorded the signal at sampling frequency
8kHz and den decimated
> it to 4khz...
Then how do you control output sampling rate of DSK 6713 board? The board is
fixed to 8 kHz, so this means you're
output sampling rate is also 8 kHz.
Please explain how you think decimation is supposed to work in this case.
> ii) now we need to extract features for which we are
using filter band
> method...so need to implement cheby2 iir filters for three
> bands.(50-500, 500-1000,1000-1500hz)
> iii) so actually we need code for fft and iir filtering. "c-code".
IIR filter C code is easily found on the web.
> iv) or if u hav already tried voice recognition wit
some other logic plz pass on the code n the details
> *Raghav B * wrote:
> On 16/04/07, Jeff Brower wrote:
>> > i'm new to this forum and currently i have been pursuing a project in
>> speech recognition systems. i am trying to
>> > design a text dependent; speaker recognition based system using the DSK
>> 6713 digital signal processor. It involves a
>> > voice input (word or phrase) which eventually drives an electronic lock
>> based upon the text content and also upon the
>> > verification of the identity of the speaker.
>> > I have been successful in implementing the storage of the voice
>> samples(for approximately 10 secs),decimating the
>> > signal and playing it back. But i am experiencing quite a predicament
>> trying to implement the c codes for the fft and
>> > the iir filtering operations. so could anybody help me out with a code
>> for fft and iir filtering( 4th order) for the
>> > voice signal input. I would be really obliged.
>> Can you explain "decimating the signal and playing it back"? This implies
you're reducing the sampling rate from the
>> original input rate. Are you actually doing that? Or are you filtering the
signal? If the latter, what's the
>> difference with the IIR 4th order filtering you say is giving you trouble?