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Re: [Discuss-gnuradio] tvrx and usrp_tv_rcv

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] tvrx and usrp_tv_rcv
Date: Mon, 8 Mar 2010 06:29:46 -0800
User-agent: Mutt/1.5.20 (2009-08-17)

On Mon, Mar 08, 2010 at 11:33:18AM +0700, Muhammad Najib wrote:
> Hello All,
> I'm trying to recreate Mr. Dayal's thesis about analog tv decoding
> using gnuradio.
> i have already got the black and white picture after taking 8MHz band
> with frequency centered in the middle of the channel.
> the problem is, i got about one or two fps with my computer(2.3GHz
> atlon64 x2 4400). Is this normal? what is the minimum cpu/memory
> requirement for this?
> thank you for your response.
> --Najib.

I'm not familiar with the code that you're using, but in general, yes,
I would expect it to be possible to decode analog TV with your
equipment.  Algorithms make a big difference...

Note also that the passband of the the TVRX is about 6 MHz wide
(NTSC), so if your channel bandwidth really is 7 or 8 MHz wide
(PAL/SECAM), you're probably filter some of the signal.


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