[vorbis-dev] Re: lossless ogg encoding with good compressionrate

[Christian Hack]

> -----Original Message-----
> From: owner-vorbis-dev at xiph.org 
> [mailto:owner-vorbis-dev at xiph.org] On Behalf Of Tom Felker
> Sent: Thursday, 26 June 2003 4:59 PM
> To: vorbis-dev at xiph.org
> Subject: Re: [vorbis-dev] Re: lossless ogg encoding with good 
> compressionrate
> 
> 
> On Wed, 2003-06-25 at 22:59, General purpose mail wrote:
> 
> > I've chosen 4 file compressed with format .ape, .mp3, .ogg ,
> > converted back to wav with dbPowerAmp like all the conversions here.
> > REMEMBER TO UNCHECK VOLUME NORMALIZE
> 
> For testing, I'd use audio straight from a CD, because if it's been
> compressed before, there may be less entropy in the low bits.
> 
> That code seems overly complex just to take a diff.  I've done trials
> myself, using this C++ code:
> 

Using my C code diff (simple subtraction) I'm getting similar
compression results. I believe he's dropping bits in there somewhere.

Christian

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