Re: Breaking Huffman Codes

bill_at_nedell.com
Date: 05/31/03 

Date: 31 May 2003 05:22:26 -0700

Mok-Kong Shen <mok-kong.shen@t-online.de> wrote in message news:<3ED774E2.6974F2D6@t-online.de>...
> bill@nedell.com wrote:
> >
> > > What are you doing with that data? Are you trying to analyze an
> > > actual plane crash? Do you have the box in your possession, or just
> > > the data?
> >
> > We provide quality assurance data analysis services for airline
> > customers.
> >
> > I don't have routine access to flight data recorder hardware. I do
> > have samples of compressed and decompressed files and I've written a
> > decoder to experiment with. So far no luck.
>
> I believe you would have quite a hard time. Is it sure
> at all that Huffman compression and not some other
> compression scheme is involved?

I forgot to mention that the flight data recorders we are analyzing
are made by L3 Communications (
http://www.l-3ar.com/html/av_products.html ), models F1000 and FA2100.
I'm hoping someone out there will know for sure what compression
scheme these boxes use.