Quote:
Originally Posted by Penthode
Has anyone considered construction of the CPA encoder? I wonder if an existing encoder chip can be modified for the purpose.
Ideally, it would be interesting to create as envisioned, a truly NTSC-CPA signal. Y', Cb', Cr', is available from many consumer devices and this would simplify the construction of the quadrature modulation and luma adder.
The R-Y axis would have to be inverted each field and the CPA sync would have to include the flag to properly correlate and signal the color field.
Any thoughts? It may be interesting to have an "official" competition to see who comes up with the best design.  Maybe the prize could be, say, an RCA CTC-11 or something like that?  |
We were discussing this offline, and I thought had mentioned it on the thread, but perhaps not. If Nick decides to restore the set to CPA specs, I'll write the algorithms for my SCRF converters to generate the correct signal. Since the entire signal is generated in firmware, nearly any conceivable format can be realized. I have done other one-off or low volume versions like the British 405 NTSC, 405 SECAM and of course CBS field sequential color.
Darryl