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Re: Noisey Transfer impossible Question.
What did Von Klauswitz say about the
past.... oh yeah; those who forget it are
doomed to repeat it!
Here is what happened in your transfer: the
facility that you transferred at fed the
digibeta with a D1 signal, and it was
recorded in digital component. All of the
work done after telecine was accomplished
using the composite output of the digibeta.
The encoder in all digibetas was designed
for monitoring purposes only. In other
words, the composite output of the digibeta
is intended for verifying that there is a
picture on the videotape, and nothing more.
The encoder in all digibetas is lacking the
proper bandpass filtering to make a correct
composite picture. What is the effect of no
filtering? Spurious grain, strange looking
noise in the picture, occasional fixed
pattern looking noise. Bad looking video.
How do you fix it?
Go back to the facility that made the
transfer and request a dub to any composite
format, like D2 through a "reference
grade" encoder, like an Accom D-Bridge or
Leitch CES-3500, or have them make an analog
component dub to beta SP.
Make sure that the Beta SP dub is made
How do you avoid these problems in the
future? If you must record to Digibeta,
specify that you want the recording made
using the component analog input of the vtr
instead of the serial digital input.
You will have no problems if you use the
analog component inputs.
For all you tech-heads lurking in the
background: in tests at SMA, we have
measured that an analog component recordings
made on Digibeta have 1 db less signal to
noise ratio than recordings made on the
same machine using the serial digital
It is a minor trade-off.
Executive Vice President 212.226.7474/V
Director of Engineering 212.941.0439/F
SMA Video Inc.
100 6th Avenue 10th Floor
New York, N.Y. 10013-1689
Thanks to Trans/EFX Systems for supporting the TIG in 1998.
No product marketing allowed on the main TIG. Contact rob at alegria.com
1008 subscribers in 38 countries on Mon Jul 6 04:20:36 PDT 1998
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