🚀 go-pugleaf

In article <1992Sep15.010517.15265@cc.uow.edu.au> annie@cc.uow.edu.au (annie george) writes:
>Has anyone been (or is ) working on the OCF coder?
>Could you tell me if any relavant code is available - e.g. at ftp sites?
>
>I am particulary interested in any information regarding the calculation of
>masking threshold, noise shaping and psycoacoustic weighting as is used
>in this coder.
>
>I believe the basic principles of this coder are incorporated in the
>proposed ISO/MPEG standard. Any comments or information will be highly
>appreciated.
>
>Thanks.
>
>Annie.
>
The work on OCF was done here in Erlangen at the university and at the
Fraunhofer Institute. In the process of standardization (ISO MPEG/AUDIO
and Eureka 149 several partners merged their algorithms. OCF now
is a part of ASPEC (adaptive spectral perceptual entropy coding)
which is a in basic the kernal of the Layer III of the upcoming
ISO standard ISO MPEG/AUDIO.

Actual there is no public code available. There will be a implementation
of the ISO standard in C (done by a group of people NOT concerned with
the developement of the algorithm, kind of clean room work). Ask your
national patent body, they should get this code first.
You will get a copy of the draft (ISO CD 11172-3) from this office, too
(I hope).

If You want more information, see in the publications on several conferences:
AES coventions  (audio engineering society)
AES conferences
of the last years.
Look for authors:
K. Brandenburg,
J.D. Johnston
G. Stoll
G. Theile
(there are many others, but with this four names You will find many
coworkers of them, too)

I hope this will work You to start !

Thomas Sporer




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Thomas Sporer                          Tel.  +49 9131 857201
Lehrstuhl Technische Elektronik        Fax.  +49 9131 302951
Cauerstr 9                             Email spo@lte.e-technik.uni-erlangen.de
W 8520 Erlangen