I found a really interesting website :
http://www.eecg.utoronto.ca/~aamodt/ece341/speech-recognition/
The algorithm seems simple enough and i think i will try to adapt it
somehow.
The problem is that there are a lot of things i cannot understand in the
math posted there. Like how to generate the coefficients for Cebysev without
Matlab since i don't own software like that
Is there someone on this list who played with bandpass filters ?

Thank you
Dumitru Stama




On 7/4/06, Russell McMahon <apptech@paradise.net.nz> wrote:
>
> > Is there an easy way of doing simple speech recognition using PIC18F
> > or even dsPIC but without microchip's library ?
> > I am going from page to page on google but so far nothing quick and
> > dirthy
>
>
> Long ago I had an article on simple speech recognition using a MC6800
> processor.
> Can't find it alas - BUT of that's possible a PIC should be easy.
> AFAIR they used perhaps a few basic bandpass filters with zero
> crossing impute from each one. A PIC with A2D should handle analog
> with ease and without A2D zero crossing should suffice.
>
> For more credit you could do the bandpass filters in software ;-).
> But, you can get a two pole filter with a single transistor or an
> opamp section so hardware needs are modest.
>
> Performance was AFAIR claimed to be OK for a small vocab of isolated
> words.
>
>
>    RM
>
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