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Re: [Discuss-gnuradio] hdtv hacking

From: Jens Elsner
Subject: Re: [Discuss-gnuradio] hdtv hacking
Date: Sat, 8 Apr 2006 10:02:08 +0200
User-agent: Mutt/1.3.28i

On Fri, Apr 07, 2006 at 07:11:21PM -0400, Michael Dickens wrote:
> I have a trellis encoder and the V decoder is in debugging (by me) -  
> hope to have version 1 finished by the end of this weekend.  These  
> are generic encoder / decoder blocks, taking arbitrary # of input  
> streams and element sizes and reproducing that on the output.   
> Throughput of the encoder using a (2 output, 2 input, 2 memory /  
> input) code (meaning 16 states) is around 10 Mb/s without optimizing  
> the programming.  As the decoder isn't operational, I don't know how  
> fast it will be ... but it's mush more complex than the encoder (no  
> surprise there) and thus will definitely be slower than the encoder.
> I don't know if these would be of interest for use by ATSC, but I'm  
> happy to provide them once I know they work.  Would also make for  
> good beta testing ;-)  I will provide them to the overall GR project  
> once I know they work and are reasonable optimized. - MLD

Maximum likelyhood decoding with the Viterbi algorithm is needed 
almost everywhere - a generic one for gnuradio would be great. 


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