[flud-devel] Short-term plans

Chinmay Kulkarni chinmay007 at gmail.com
Thu Sep 27 23:51:03 PDT 2007


Oops. Forgot about patents!

Rest below.

On 9/28/07, Alen Peacock <alenlpeacock at gmail.com> wrote:

> > Is the variance high enough that we can't cover it using our redundancy
> > criteria?
>
> I initially thought so, but I have not been able to find a method for
> reducing the variance using ldpc, at least not for the relatively
> small number of blocks we'd like to produce.  If some method exists,
> I'd love to know about it, since ldpc encode times are at least 5x
> faster than the fastest rs encoders I've been able to test.


Um... no. I haven't a clue either.

Actually, my point is that the number we should be looking at is the
expected maximum number of blocks that we need to recover; not the average.

What is the order to the difference? If the LDPC max (say for a 99%
confidence-level) is much higher than the hard limit for RS, then yeah, RS
would be a better choice. Else, it would seem a rather slow algorithm.

Would love to read some paper which does this variance analysis. (Since I am
at my univ, I can get papers from IEEE etc. Just send in a link if possible.
Thanks!)

-- 
Yours,
Chinmay Kulkarni,
www.celbits.org
+91 99835025822

Think BIG!
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