[vorbis-dev] lossless ogg encoding with good compression rate

[Francesco R.]

I think it's too difficult work with 17 bits values, we need to arrive
at 24 or 32, I think it's not a problem because they'll be quite always
0's so they are well compressed.
Most off all I think we need some testing more than theorizing on theese
probabilities.

Francesco
----- Original Message ----- 
From: "Lourens Veen" <lourens at rainbowdesert.net>
To: <vorbis-dev at xiph.org>; "Francesco R." <francesco at pnpitalia.it>; "Beni
Cherniavsky" <cben at techunix.technion.ac.il>
Sent: Friday, June 27, 2003 11:22 AM
Subject: Re: [vorbis-dev] lossless ogg encoding with good compression rate

<p>On Fri 27 June 2003 10:46, Francesco R. wrote:
> First of all, sorry I've lost quite all the thread, I'm
> subscribed again with this mail address

Well you can look it up in the archives if you want to.

> the difference on my files has NEVER been over 0xFFF, but what
> you say it's correct.
>
> Now we can procede in two ways, accept the in the real life there
> are some risks and accept them ;) or intercept this cases and
> round them to the maior number we can, it's time consuming but
> also on the encoding part of the process.

And it totally defeats the purpose of a lossless compression
algorithm. If it's going to be lossy anyway we might as well use
Vorbis only.

You could just use 17-bit values and then use a specialised Huffman
coder (or likely something more advanced) to reduce entropy. That
would be a correct solution and it would still be efficient.

Lourens

-- 
GPG public key: http://home.student.utwente.nl/l.e.veen/lourens.key

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