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From: aptr@ur-tut.UUCP (The Wumpus)
Newsgroups: net.video,net.audio
Subject: Re: Re: MTS stereo decoders ?
Message-ID: <797@ur-tut.UUCP>
Date: Tue, 21-Oct-86 13:26:15 EDT
Article-I.D.: ur-tut.797
Posted: Tue Oct 21 13:26:15 1986
Date-Received: Wed, 22-Oct-86 06:28:02 EDT
References: <368@cord.UUCP> <1372@uwmcsd1.UUCP>
Reply-To: aptr@ur-tut.UUCP (The Wumpus)
Organization: Univ. of Rochester Computing Center
Lines: 31
Xref: watmath net.video:3508 net.audio:9794

In article <1372@uwmcsd1.UUCP> dave@uwmcsd1.UUCP (Dave Rasmussen) writes:
>I think I started this conversation about decoders a couple weeks ago, and
>have since ordered a hi fi vcr. A couple days after ordering I got a new
>DAK catalog and they have a ADC V400 Sound Processor for $69. It lists
>it has simulated stereo, stereo wide, and dnr noise reduction. Anyone have
>anything to say about this unit? My vcr doesn't have noise reduction, and
>might consider trying this unit for 30 days...
>

I believe the $69 dollar unit from DAK only simulates stereo sound.
It is not the samething that a stereo vcr put out.  A stereo VCR puts
out a true stereo with both tracks having the ability to be
independent.  A stereo simulator takes a mono signal, plays with it,
and then puts to signals out.  There are several different ways that
it does this, and I am not really sure on the specifics of each.  The
important thing is that the signal comes from mono and is only
simulated stereo.  It is probably not the samething the orignal stereo
signal was.

BTW, I think that part of the MTS standard is some type of noise
reduction (dbx?).  I also believe that on a Beta Hi-Fi, the stereo
tracks are almost imune to audible noise because the signals are laid
down by the same set of sweeping heads that puts down the audio.
Needless to say, the scan rate for the audio is several times greater
then that of a standard tape recorder and therefore the frquency of
the noise is also several times higher.
-- 
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