[QuadList] Gene Kelley Show color recording system

[C. Park Seward]

But Brian,

Doesn't a TBC look at each pixel timing and correct for that? It it  
just corrected a line at a time, wouldn't the pixels in the line have  
error?

I can have horrible scalloping visible on the demod out but the NEC  
TBC totally corrects the error. I assume the function of the quad  
analog correctors perhaps are not that precise. Perhaps they do look  
at a line at a time and the Velcomp then fixes the velocity errors  
remaining.

Best,
Park

C. Park Seward
Visit us: http://www.videopark.com



On Jan 1, 2009, at 3:31 PM, Brian Hoover wrote:

> Velocity error is the error that accumulates across a line that is a  
> result of time base correction applying its correction at the start  
> of a line, where the reference is -- i.e. horizontal sync and color  
> burst, and not changing across the line as the original error does.  
> Scallops due to guide height being off are a good example of errors  
> that are not totally removed by ATC or Amtec alone -- they are still  
> slightly visible on the right edge of the picture -- are an example  
> of monochrome 'velocity errors'.
>
> Brian

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