Thanks Matt for your quick response.
I am trying to find a one chip solution (supporting both RS170 and DVI) because I am running out of pins on my high speed connector. The digital output (i.e. RGB) will be going to another circuit board.
Do you know why ADV7441A is NRND? I heard ADV7842 is the suggested replacement but it's not industrial grade.
I think since the monocrome RS-170 resolution is a non-standard video, I'll need to use the Component Processor. Please correct me if I'm wrong.