RE: [AV Media Matters] Problems with half inch videoreformatting

["Copeland, Peter" <Peter.Copeland@bl.uk>]

Dear Brad,
    I have found this problem when a scratch has become applied through
the
whole length of the videotape. The "control track" remains intact, so
the
picture is displayed with correct framing. The only "cure" is not
applicable
to an archival copy, and will require marrying printed-circuit boards in
your open-reel player, and something called a "dropout compensator" from
another machine. This will sense the lack of luminance information where
the
scratch is, and patch it with another line delayed by one line-interval.
Peter Copeland

-----Original Message-----
From: Bradley Reeves [mailto:stymiedc@yahoo.com]
Sent: 10 November 2003 01:33
To: Media Matters; Amia
Subject: [AV Media Matters] Problems with half inch video reformatting

Hello, 

We have been transferring / reformatting several
collections of 1970s era half inch reel to reel
videotape. Besides the sticky shed problem, I have
encountered two tapes that have vertical lines
appearing across the visual image through the entire
reel. All of the other tapes in the collection do not
have this issue. The tapes have been baked and
excercised several times, and the player heads have
been thoroughly cleaned. I feel that the problem is
related to some sort of signal interference during the
actual videotaping, therefore there is nothing that
can be done about it.

BUT, I wanted to make sure. Anyone encountered this
problem before?

Thanks you, 

Brad
=====
Bradley Reeves
Media Archivist
Archives of Appalachia
East Tennessee State University
423-439-4338
stymiedc@yahoo.com


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