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<DIV>DMR EX773 or DMR EX99V, not sure what is available outside UK -
Europe</DIV>
<DIV> </DIV>
<DIV>David Dean<BR>Westpoint Television<BR>Archiving Services <BR>2" Quad , 1"
B, 1"C, D1, D2, D3, D5, HDCam and HDV <BR>.5", EIAJ, In Various Standards where
supported<BR>Alchemist Ph.C conversions with Clean Cut<BR>Snell and Wilcox Ukon
for HD frame rate conversions and Up and Down conversions<BR>Digital Vision DVNR
with scratch and dropout concealment<BR>Tel 020 8742 3400 </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=COURYHOUSE@aol.com
href="mailto:COURYHOUSE@aol.com">COURYHOUSE@aol.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=quadlist@quadvideotapegroup.com
href="mailto:quadlist@quadvideotapegroup.com">quadlist@quadvideotapegroup.com</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, December 13, 2011 3:55
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [QuadList] What to do with
1/2 inch tapes and proc amps</DIV>
<DIV><BR></DIV><FONT id=role_document face=Arial color=#000000 size=2>
<DIV>
<DIV>
<DIV>David, what is the part # of it??
Ed#</DIV>
<DIV> </DIV>
<DIV>In a message dated 12/13/2011 7:00:46 A.M. US Mountain Standard Time, <A
href="mailto:dixie@westpoint.tv">dixie@westpoint.tv</A> writes:</DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT
style="BACKGROUND-COLOR: transparent" face=Arial color=#000000 size=2>
<DIV>Hi List</DIV>
<DIV> </DIV>
<DIV>Here is a trick I have used with half inch tapes, I have a dual
standard Panasonic DVD recorder which acts as one of the best TBCs I
have seen, put in any old signal, and it outputs broadcast PAL or NTSC,
(depends on which standard is selected). It is useful to have a variable
attenuator on the input. Dont forget to pass the sound through it as well to
keep it in sync !</DIV>
<DIV> </DIV>
<DIV>Jobs a goodun</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>David Dean<BR>Westpoint Television<BR>Archiving Services <BR>2" Quad ,
1" B, 1"C, D1, D2, D3, D5, HDCam and HDV <BR>.5", EIAJ, In Various Standards
where supported<BR>Alchemist Ph.C conversions with Clean Cut<BR>Snell and
Wilcox Ukon for HD frame rate conversions and Up and Down
conversions<BR>Digital Vision DVNR with scratch and dropout
concealment<BR>Tel 020 8742 3400 </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=mailto:Chill315@aol.com
href="mailto:Chill315@aol.com">Chill315@aol.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=mailto:quadlist@quadvideotapegroup.com
href="mailto:quadlist@quadvideotapegroup.com">quadlist@quadvideotapegroup.com</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, December 13, 2011 1:35
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [QuadList] What to do with
1/2 inch tapes and proc amps</DIV>
<DIV><BR></DIV><FONT face=Arial color=#000000 size=2>
<DIV>This is a good discussion regarding 1/2 inch tapes. I
hope I do not get too verbose with this answer.</DIV>
<DIV> </DIV>
<DIV>The EIA-J tapes may be a real problem. The first step is to
look at the raw video on a waveform monitor.</DIV>
<DIV> </DIV>
<DIV>Is the sync even interlaced? Some of the early cameras were
just free running horizontal oscillators and vertical locked to power
line.</DIV>
<DIV>Is it industrial or RS-170? Look for equalizing pulses in the
vertical interval. If not, then many professional proc amps and
TBC's will have problems.</DIV>
<DIV>What is the level that you are dealing with? Hopefully 100 over
40 but don't count on it with the early AGC circuits for video.
</DIV>
<DIV> </DIV>
<DIV>If you get past this first step, then it is see what works. For
non RS-170 video, you are in never, never land. It is try, try, and
try again. The 3M unit may help. Also there are other very
early proc amps out there. Even a video DA to adjust sync to a 40
IRE level may help.</DIV>
<DIV> </DIV>
<DIV>There are video DA's that have sync stretch in them, that may be
something to try.</DIV>
<DIV> </DIV>
<DIV>What will the proc Amp do for you?</DIV>
<DIV> </DIV>
<DIV>It will allow you to adjust the video levels prior to Analog to
Digital conversion to give you best range in that process. It will
clean up the sync pulses to allow proper write clock operation.
</DIV>
<DIV> </DIV>
<DIV>What will be the bad things it will do?</DIV>
<DIV> </DIV>
<DIV>If used before a TBC, it may put a lot of jitter in your final
picture. This is because the Proc Amp has replaced the sync and the
video is not always coherent with the video anymore. You sometimes
see this as high frequency jitter or Venetian blinds. </DIV>
<DIV> </DIV>
<DIV>If not RS-170 sync it will burp a lot if it only works with RS-170
sync. Again never, never land.</DIV>
<DIV> </DIV>
<DIV>If heterodyne color we are into never, never land again. Each
manufacture treated this in different ways. Grass Valley was not
designed for this. Now if used before the TBC, again it is never,
never land. You have to experiment to see what you can do.</DIV>
<DIV> </DIV>
<DIV>Where do you put it in the chain?</DIV>
<DIV> </DIV>
<DIV>The TBC has a proc amp on the output. It is required in the
design of any TBC to function. Since the Horizontal interval is not
digitized, it has to be re-generated and inserted in the output of the
TBC. Along with the other handles that we expect. Manufactures
have a couple of choices on where to put the video gain in a TBC.
Most do it at the output. It is possible to put it before the A-D
converter. This gives you better dynamic range. It is an
engineering trade off.</DIV>
<DIV> </DIV>
<DIV>There is one method that works almost every time. It requires
some of the most sophisticated equipment known to man. A black magic
cloth, a good monitor and a camera. Use an under scan monitor and
point a camera at it to just fill the scans of the camera. Drape it
so light does not get in and start the transfer. The fast time
constant of the monitor serves as the TBC. If you have access to
ramp or stair steps, then set up the monitor and camera to give as good a
transfer as possible. Monitor for correct brightness and
contrast. Camera for correct white and black plus gamma.</DIV>
<DIV> </DIV>
<DIV>Chris Hill</DIV>
<DIV>WA8IGN</DIV></FONT></BLOCKQUOTE></FONT></BLOCKQUOTE></DIV>
<DIV></DIV></DIV>
<DIV> </DIV></FONT>
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