NetNews Usenet Archive 1992 #31/NN_1992_31.iso/spool/rec/video/releases/3988

Internet Message Format | 1992-12-30 | 2.6 KB

Xref: sparky rec.video.releases:3988 rec.video:15202
Newsgroups: rec.video.releases,rec.video
Path: sparky!uunet!paladin.american.edu!gatech!usenet.ins.cwru.edu!neoucom.edu!wlrc
From: [e-mail] (William R. Cruce)
Subject: Re: scrolling white lines
Message-ID: <[e-mail]>
Organization: Northeastern Ohio Universities College of Medicine
References: <[e-mail]>
Date: Wed, 30 Dec 1992 07:50:25 GMT
Lines: 37

In article <[e-mail]> [e-mail] (Frank D. Malczewski) writes:
>I see more and more of what I call "scrolling white lines" on many of
>the laserdiscs I rent, and have gone through a couple of exchanges of
>"Terminator" WS and "2001" WS to get "clean" copies.  With rental LDs,
>I have just assumed that many of them have just been abused (finger-
>prints, little scratches, etc), but with the "brand new" LDs I'm
>beginning to wonder whether my CLD-3080 is a bit out of whack, and
>thus more susceptible to such discs than other players might be.  I
>have discs that have no scrolling white lines; until Fantasia and
>Clockwork Orange (both CLV), I did not have any.
>
>Did I just pick two discs that leave something to be desired in terms
>of overall mastering quality (I recall that there are no such lines
>in "Apocalypse Now", for example, nor on any of the CAV disks I've
>viewed)?  (By "two discs", I am referring to "Terminator" and "2001";
>I have yet to receive good copies of either of these.  "2001" scrolling
>white lines seemed to have appeared in different places (maybe one
>was in the same place, out of approx a handful per side 1/2) on the two
>different sets I've examined).

Scrolling lines will be seen only on CLV. On CAV they will be a steady
line across the screen.  On freshly opened discs they are often caused
by bits of visible dirt (e.g., pieces of plastic from somewhere).  If
still present after cleaning the disc (contact Bob Niland, [e-mail]
for his article on care of discs) the rolling lines may be caused by
visible defects in the disc (black spots embedded in the plastic) or
even defects which are not visible.  Replacing the disc will usually
correct the problem, though if the pressing is bad you may simply find
scrolling lines in other spots.  You have to be the judge if the
scrolling lines occur too frequently or not.  Most pressings will
have a few isolated scrolling lines.


--
    The answer is never simple and is always changing.
    William L.R. (Bill) Cruce       INTERNET: [e-mail]
Neurobiology Dept, NE Ohio U Coll of Med, POB 95, Rootstown, OH 44272