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Path: utzoo!utcs!lsuc!pesnta!hplabs!hao!noao!terak!doug
From: doug@terak.UUCP (Doug Pardee)
Newsgroups: net.video
Subject: Re: Stereo TV
Message-ID: <381@terak.UUCP>
Date: Mon, 18-Feb-85 13:59:41 EST
Article-I.D.: terak.381
Posted: Mon Feb 18 13:59:41 1985
Date-Received: Wed, 20-Feb-85 08:44:40 EST
References: <511@intelca.UUCP>
Distribution: net
Organization: Terak Corporation, Scottsdale, AZ, USA
Lines: 19

One of the national magazines (Radio-Electronics) is running a series
of articles describing the technical points of Stereo TV.  Here are
the major points:

  1) The system is similar to FM stereo (L+R baseband, pilot carrier,
     L-R subchannel DSBSC modulated on 2 X pilot frequency, other
     subchannels authorized);
  2) The pilot carrier == the horizontal sweep frequency (15734 KHz);
  3) The L-R subchannel (but *not* the L+R baseband) is compressed
     using dbx(tm).

The FCC was explicit that this is not *the* Stereo TV system, and that
other systems could be introduced in the future.  But this is the only
approved system to date, there are no signs of any other system in the
works, and the FCC did specify that any future incompatible systems
must not transmit a pilot carrier at 15734, as this pilot is the
"signature" of the current system.
-- 
Doug Pardee -- Terak Corp. -- !{hao,ihnp4,decvax}!noao!terak!doug