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Re: [Discuss-gnuradio] hdtv hacking
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] hdtv hacking |
Date: |
Fri, 7 Apr 2006 18:20:01 -0700 |
User-agent: |
Mutt/1.5.9i |
On Fri, Apr 07, 2006 at 06:49:07PM -0400, Charles Swiger wrote:
>
> > The most likely reason it doesn't pass, is that there is a 52
> > segment delay between what you write into the interleaver, and what you
> > get out of the deinterleaver. To work around the behavior, drop the
> > first 52 segments of the output and then compare the remainder with
> > the input.
> >
>
> Well - writing expected_results and result_data out to files
> and manually comparing show they do match, so interleaver/deinterleaver
> work - cool! (putting skip AFTER inter, deinter). I'll finish the
> test code and move on to Trellis Encoder / Viterbi Decoder.
That's great.
Did you figure out how to compare them without writing to files?
> The latest benchmark I have for the 0.9 atsc is 10 minutes of data
> takes about 14 hours to decode on an Athlon 3200+ (2200 MHz real),
> and over HALF that time is spent resampling and up-mixing the data
> to emulate an mc4020 to atsc_rx.
Did you do the 5:2 resampling using the rational_resampler, or did you
interpolate then decimate in two steps?
Great work!
Eric
- Re: [Discuss-gnuradio] hdtv hacking, (continued)
- Re: [Discuss-gnuradio] hdtv hacking, Charles Swiger, 2006/04/07
- Re: [Discuss-gnuradio] hdtv hacking, Eric Blossom, 2006/04/07
- Re: [Discuss-gnuradio] hdtv hacking, Charles Swiger, 2006/04/07
- Re: [Discuss-gnuradio] hdtv hacking, Michael Dickens, 2006/04/07
- Re: [Discuss-gnuradio] hdtv hacking, Eric Blossom, 2006/04/07
- Re: [Discuss-gnuradio] hdtv hacking, Jens Elsner, 2006/04/08
- Re: [Discuss-gnuradio] hdtv hacking, Martin Dvh, 2006/04/09
- Re: [Discuss-gnuradio] hdtv hacking, Eric Blossom, 2006/04/09
- [Discuss-gnuradio] Re: Viterbi Decoder, Michael Dickens, 2006/04/10
- Re: [Discuss-gnuradio] hdtv hacking,
Eric Blossom <=
- Re: [Discuss-gnuradio] hdtv hacking, Charles Swiger, 2006/04/08
- Re: [Discuss-gnuradio] hdtv hacking, Charles Swiger, 2006/04/10