BOUNCE progsoc@nospam.progsoc.uts.EDU.AU (Re: [ProgSoc] DVD audio)

[Wim Pranata <wpranata@nospam.progsoc.uts.edu.au>]

>From whophd@nospam.progsoc.uts.edu.au Thu Feb 15 01:26:57 2001
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From:	Christian Kent <whophd@nospam.progsoc.uts.edu.au>
To:	esydav@nospam.tig.com.au
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	The Programmers' Society <progsoc@nospam.progsoc.uts.edu.au>
Subject: Re: [ProgSoc] DVD audio
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On Wed, 14 Feb 2001 esydav@nospam.tig.com.au wrote:

> Don't know much about this and could be wrong but from what i 
> understand you don't need to unscramble if only want CD quality.  

Well I stand open to correction too, but my understanding is this:

 - Audio forms part of MPEG-2 mux'ed stream, or
 - Audio forms part of AC-3 data, not related to raw or MP3 at all
 - mux'ed data is then CSS scrambled (optional part of DVD spec)
 - this is then saved into the .VOB file

Most commercial things will of course be scrambled, which has regional
settings, etc etc.  iDVDs won't, and can't have scrambling;  this will
form the first widespread exception.


> As the embedded watermark  'noise' is not recorded if you only 
> record at lower sample rates like CD, and is only in place to stop 

Maybe you're thinking of the enhanced CD audio format, the one which is
backward compatible and is the only remaining "new" CD spec that's still
alive (because of the compatibility).


CK.
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