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Re: [Discuss-gnuradio] work function - how it fits in the big picture

From: Charles Swiger
Subject: Re: [Discuss-gnuradio] work function - how it fits in the big picture
Date: Thu, 20 Apr 2006 15:31:05 -0400

On Thu, 2006-04-20 at 09:12 -0700, Eric Blossom wrote:
> > 
> > Runs, few issues in the qa script then will update cvs.
> > 
> > --Chuck
> Don't commit the change to flow_graph.py, I believe the right answer
> is elsewhere.  Please do commit the atsc changes even though it fails
> make check, and I'll use it to test and fix.  I think this is a symptom
> of the same problem Marcus is seeing when trying to use large numbers
> of taps in the FFT filters.

atsc_trellis_encoder, atsc_viterbi_decoder and atsc_ds_to_softds to
glue them together have been checked in. The python qa_atsc.py script
has another loopback test 002 for 

src -> randomizer -> rs_encoder -> trellis_encoder -> ds_to_softds ->
    viterbi_decoder -> rs_decoder -> derandomizer -> dst
assert src = dst

Notice that it does NOT have the interleaver/deinterleaver as I
don't know how to handle the 52 segment delay which causes
trellis to choke on regular segment flag check.


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