[ogg-dev] OggPCM2 : chunked vs interleaved data

Erik de Castro Lopo mle+xiph at mega-nerd.com
Thu Nov 17 01:59:56 PST 2005

Sampo Syreeni wrote:

> Secondly, I'd like to see the channel map fleshed out in more detail. 


I did flesh out the wiki a **little** more. Is the intent clearer now?

> (Beware of the pet peeve...)

What is that pet peeve?

> IMO the mapping should cover at least the 
> channel assignments possible in WAVE files, the most common Ambisonic 
> ones, and perhaps some added channel interpretations like "surround" 
> which are commonly used but lacking in most file formats.

I haven't enumerated them all, but we should be able to without too
much trouble,

 (For example, 
> THX does not treat surround as a directional source, so the correct 
> semantics cannot be captured e.g. by WAVE files.

Do you have any more info about THX? I've searched the web and found
little of any worth.

> (As a further idea prompted by ambisonic compatibility encodings, I'd 
> also like to explore the possibility of multiple tagging. For example, 
> Dolby Surround, Circle Surround, Logic 7 and ambisonic BHJ are all 
> designed to be stereo compatible so that a legacy decoder can play them 
> as-is.

Does the Channel Conversion Header cover this?

  Erik de Castro Lopo
"The lusers I know are so clueless, that if they were dipped in
 clue musk and dropped in the middle of pack of horny clues, on
 clue prom night during clue happy hour, they still couldn't get
 a clue."   --Michael Girdwood, in the monastery

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