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Re: [AVT] Vorbis RTP issues list for Vienna

Ross Finlayson <finlayson@live.com> Wed, 09 July 2003 19:27 UTC

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Date: Wed, 09 Jul 2003 12:20:32 -0700
To: avt@ietf.org
From: Ross Finlayson <finlayson@live.com>
Subject: Re: [AVT] Vorbis RTP issues list for Vienna
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>I may be incorrect here, but from my discussions with Phil earlier
>in the year, the codebook issue has these requirements:
>
>  -- May change every few minutes (say, once per song when used for
>     Internet radio apps).

IMHO, this is a flaw in the "Vorbis" architecture.  It would be much better 
to have a fixed, predefined set of codebooks that all receivers would know 
in advance.  Then you'd need to send only a 'codebook id', which should be 
small enough to include in the Vorbis RTP payload format header.

Having to send a complete codebook for each song partially defeats the 
purpose of audio compression.

The Vorbis designers should just figure out a complete set of codebooks 
that are likely to be useful, and settle on those.

         Ross.


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