Path: utzoo!mnetor!tmsoft!torsqnt!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!mcsun!unido!zgdvda!baloo!pfuetz
From: pfuetz@baloo.uucp (Matthias Pfuetzner)
Newsgroups: comp.music
Subject: Infos on Digital Datareduction sought
Keywords: DCC, CD, Datareduction, Datacompression, digital audio, etc.
Message-ID: <4137@zgdvda.zgdvda.uucp>
Date: 14 Feb 91 11:11:56 GMT
Sender: news@zgdvda.zgdvda.uucp
Reply-To: pfuetz@agd.fhg.de (Matthias Pfuetzner)
Organization: Zentrum fuer Graphische Datenverarbeitung, Darmstadt, FRG
Lines: 30

Hello All!

I'd like to know whether anybody out there might have  the information
I'm   looking  for.  Last  week  I   read  in a   german   magazine on
Hifi-Stereophonie (the  magazine is called "Stereoplay")  that Philips
is doing much in order to get his DCC (Digital  Compact Cassette) into
the  market.   They  announced the first  recorders  for  spring 1992.
Because of the  fact  that these shall  use no rotating  heads (S-DAT)
they need to reduce the amount of digital data to be recorded. (CD 2.5
Megabit   /   second  down  to  0.77 Megabit   (including  subcode and
error-information)   for  DCC). The  algorithm  used   is  called PASC
(Precision  Adaptive Subband Coding).  There are some other algorithms
available (MUSICAM, MASCAM, ASPEC,  OCF). As  far as  I read  the  ISO
(International Standardisation  Organisation) will  release a standard
on this subject.

What I'm looking for now is  information on the  basic algorithms, the
steps the ISO already did, etc.

The     reason  for  that  is,   that   Sun   SparcStations have audio
possibilities and I'd like to use them on  some amount. So any hint is
highly appreciated.

Thanks in advance,
	Matthias
-----
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