[QuadList] Gene Kelley Show color recording system

[Dennis Degan]

		On Jan 1, 2009, at 5:13 PM, C. Park Seward wrote:

 > Question: Why would the chroma not have the same error as the 
luminance?

		I offer:

	In an original direct recording, chroma WOULD have the same errors as 
luminance.  Once copied from one machine to another, color processing 
would produce new separate chroma errors from the luminance's, 
resulting in different mechanical errors between the two.  This makes 
the color information 'non-coherent' with the luminance.
	I faintly recall that Ampex machines had a separate RF or demod output 
that allowed dubbing the signal (prior to any processing) directly from 
one machine to another.  While this would introduce additional 
mechanical errors, the errors would be in both chroma and luma equally, 
since they had not been separated and processed separately.  Sort of an 
analog 'clone', if you will.  I don't know if there were any dubs made 
in this way, but the connection was there on the back of the VR-2000, I 
believe.

		Park also asked:

 > How does velocity error show up in monochrome?

		I say:

	Aside from what has already been mentioned, it must be said that 
velocity error exists even in monochrome.  But since monochrome 
reproduction is not as critical as color reproduction, velocity error 
is not normally visible.  Velocity error is microscopic compared to 
other mechanical errors.

			Dennis Degan, Editor-Consultant-Knowledge Bank
	  				NBC Today Show, New York