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Altera_Forum's avatar
Altera_Forum
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15 years ago

fft on nios

hello everyone. im working on speech recognition project using nios2 on de2 board. now i need to do fft to the signals i get from the audio codec. can anyone help with this ? how to conect...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I'm not sure I'd want to take interrupts at 8kHz - not through any generic interrupt handler code.

Using a fifo to buffer enough samples for 1 fft would probably be enough.

We are using the hardware fft with dma to feed data in/out to do tone detect on 240 8kHz TDM streams. With dma and the hardware fft this isn't a timing constraint.