[QuadList] 1" Type C--bandwidth of chroma channels

[Ted Langdell]

On Jun 16, 2010, at 11:41 PM, Tim Stoffel wrote:

> On Wed, 2010-06-16 at 15:13 -0700, C. Park Seward wrote:
>> Type "C" is composite and only has the resolution of 4:1:1. The  
>> chroma channels are 1.5 and .5 MHz (on a good day).
>>
> Type C itself is not 4:1:1. It is direct color, so the composite
> waveform is faithfully recorded unlatered. It is the upstream NTSC
> encoder that sets the effective chroma 'sampling'.
>
> SMPTE 170M called for equal bandwidth I and Q channels.
>
> Tim Stoffel

What about processing in the TBC needed to recover a stable signal?   
Obviously a factor of the particular TBC used...

Ted

Ted Langdell
Secretary