[vorbis-dev] [Jan.Tangring@et.se: spectral band replication]

[Jack Moffitt]

Jan,

I'm forwarding this message to the rest of the developers.  Hopefully
one of them will have a good answer to your question.

---------

Does someone want to take this one?

Just make sure you copy him on the answer, as he's not on the list.

jack.

----- Forwarded message from Jan.Tangring at et.se -----

From: Jan.Tangring at et.se
To: jack at icecast.org
Subject: spectral band replication

I don't know if it is proper to adress as some kind of representative 
of thge Ogg vorbis project, I dont find names on the homepage.

I am a reporter on a swedish computer magazine called Datateknik 3.0, 
and I am doing a story on the swedish company Coding technologies, 
who are adding its "coding enhancer" SBR (spectral band replication) 
to MP3 and AAC. Thomson will demo "MP3PRO" equipment this summer.

Lars Liljeryd tells me that SBR is unique, and that it builds on 
fifteen man-years of research and development.

So, unique, he says. But obvioulsy he is partial on that, cause it is 
his own patents he is talking about. So I would very much like to 
have a second opion on that, and I don't know ehere else to turn to 
but to this open community.

Do you (or the ogg vorbis community) understand how SBR works? There is info on
http://www.codingtechnologies.de/technology/sbr.htm
bnut I am guessing this infop is not enough to explain the technology.

Is SBR really a unique technology or is it just part of some kind of 
patent maneuvering strategy?

I am also of course interested in if Ogg vorbis has plans to 
incorporate some kind of SBR-like enhancement to its format?


-- 
-- Jan T?ngring, reporter Datateknik 3.0 (www.datateknik30.se)

----- End forwarded message -----

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