Re: [Discuss-gnuradio] Interpolation Issues

[Eric Blossom]

On Thu, Jun 23, 2005 at 05:47:08PM -0400, address@hidden wrote:
> Hi,
> 
> In the process of demodulating the video sigal from the tv signal we receive, 
> we
> have been interpolating from 8 MS/s by a factor of 2 to 16 MS/s.  However, 
> just
> demodulating the audio alone takes 97% of our computer's usage, and as soon as
> we interpolate to 16 MS/s the usage peaks at 100% and we get usrp overload
> errors.  Currently our computer's processor is 3.6 GHz.  I was wondering if
> anyone else has come accross computer processing problems when demodulating 
> the
> video.
> 
> thanks
> Brent

First off, why are you interpolating?

GNU Radio can demodulate TV audio using a few percent of Pentium M laptop. 
As an existence proof, point tvrx_wfm_rcv_gui.py at the audio carrier.

Without seeing your code, I can't speculate further.

Eric