[QuadList] Blanking Issues

[Tony Quinn]

In message 
<F0980110198A0D47AA3ED9D26017D3B40DD4F7E60A at EX3.ACDM.DS.SAIT.CA>, Wayne 
Watson <wayne.watson at sait.ca> writes
>It was in the SMPTE standard. Ampex made it an option and Sony made it
>standard. The concern was that something in the future might need the
>V.I. However in type C only lines 4 to 14 were missing so VITC and VITS
>were still there. I think there was also an issue where Sony did not
>want tp pay re a patent Ampex had on control track update (or something
>like that)and needed the V.I. to do it their way. Can anyone shed more
>light on that?

Surely part of it was Sony's decision to go with a one piece upper drum 
assembly compared to Ampex's separate heads approach. It'd be easier to 
manufacture a single part for all machines, and that single part would 
require all options in it.
-- 
If one person has delusions, we call them psychotic. If, however, 1.5 billion
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respect their delusionary state.