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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 18:16:06 -0400

On Thu, 2006-04-20 at 13:54 -0700, Eric Blossom wrote:
> > 
> > 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.
> I think that if you move the skiphead to the very end (or just do it
> by slicing the 52 out of the python expected vs actual vals), it will
> work with the interleaver in.

Done - but I had to drop skiphead alltogether for some reason it
emits lots of zeros, maybe just on mpeg_packet size items. I don't
know, but just trimming expected_result and result_data in python
works and all is ok now. Updated and checked in.

Oh, and you have to include another 12 packet delay from the viterbi
decoder. 52+12.

All that was just tying a ribbon on nearly finished code - going forward
the field sync and bit timing stuff looks pretty formidable and sketchy.

It'd be nice to find the Wayne Bretl text.


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