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Re: [Discuss-gnuradio] Comb Filter
From: |
Prateek Dayal |
Subject: |
Re: [Discuss-gnuradio] Comb Filter |
Date: |
Tue, 4 Jan 2005 13:13:15 -0800 |
Thanks .. my concern right now is to get a video decoding system
working. Speed is not the issue. Once I am able to do this, I can fine
tune different modules. I also have to find out how to convert the
decoded intensity (Y) values to something that can be displayed by the
display driver ....
Regards,
Prateek
On Tue, 4 Jan 2005 15:43:17 -0500 (EST), cswiger <address@hidden> wrote:
> On Tue, 4 Jan 2005, Prateek Dayal wrote:
>
> > Can you please suggest a site, where I can find the specifications
> > for the comb filter etc for NTSC decoding. From the books that I have,
> > it is not very clear ...
> >
>
> Just for giggles today I did a little research into comb filters
> and found this page, altho it's audio application:
>
> http://ccrma.stanford.edu/~jos/pasp/Feedforward_Comb_Filter_Amplitude.html
>
> and other pages on the same site. A basic comb filter is pretty easy to
> create:
>
> comb = gr.fir_filter_fff (1, [1, 0, 0, 0, 0, 1])
>
> will give you 5 notches between 0 and sample rate, etc. However I didn't
> see anything specific to ntsc seperation (that I could understand ;).
> I used that with some noise and the fft display and it indeed makes a comb
> filter.
>
> Like Eric said using something like the above might not be fast
> enough for real-time video.
>
> --Chuck
>
>
--
Prateek Dayal
B.Tech 4th Year
ECE
IIT Guwahati
www.geocities.com/pmd_iitgw
- [Discuss-gnuradio] Comb Filter, Prateek Dayal, 2005/01/03
- Re: [Discuss-gnuradio] Comb Filter, Eric Blossom, 2005/01/04
- Re: [Discuss-gnuradio] Comb Filter, Prateek Dayal, 2005/01/04
- Re: [Discuss-gnuradio] Comb Filter, cswiger, 2005/01/04
- Re: [Discuss-gnuradio] Comb Filter,
Prateek Dayal <=
- Re: [Discuss-gnuradio] Comb Filter, Eric Blossom, 2005/01/04
- Re: [Discuss-gnuradio] Comb Filter, Daniel O'Connor, 2005/01/04
- Re: [Discuss-gnuradio] Comb Filter, Martin Dvh, 2005/01/04
- Re: [Discuss-gnuradio] Comb Filter, Prateek Dayal, 2005/01/05
- Re: [Discuss-gnuradio] Comb Filter, Martin Dvh, 2005/01/05
- Re: [Discuss-gnuradio] Comb Filter, Dave Dodge, 2005/01/05
- Re: [Discuss-gnuradio] Comb Filter, Eric Blossom, 2005/01/04