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speech recognition

Honored Contributor II

hey everyone 


i am working on speech recognition project with nios2 and i need some help. 

after recording the words from the audio codec i do software fft (with ffteasy code that based on numerical recipes algoritem). 

my problem is that the power of the voice that i say the word has huge influence and because of this i cant recognize the speech. 

i will be very greatfull if anyone can help me and give some solution to deal with this problam. 


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2 Replies
Honored Contributor II


did you get the data from audio codec and save in a memory ? i'm trying to take the right data and the left data from audio core to a dual port ram . how can I use two channel or ıf you use Microphone how can arrange the parameters in controller code? can u send me your code for examine ? 


about your question  


ın wm8731 datasheet there is some information about volume control and db calculatıon  

and in the cornell university final projects you can find the speech recognation project
Honored Contributor II

I'm also working on a speech recognition project. Does anyone know of a temp program in VHDL coding that can show me an example of getting the input voice (one word) from a Mic on a FPGA Altera D2E board?