Closed caption generator chips?

[Foone]

Hi, I'm doing some work with extracting bitmaps from character generator chips like those used in closed captioning from the 90s. I've currently got three:

STM STV5730A:


Maxim MAX7456:


And Mullard SAA5050:

(Not super accurate yet, cause it does some internal smoothing)

I'm looking for the names of similar chips, as they usually have the bitmaps in the datasheets. I'm specifically looking for ones used in closed captioning, these tend to be more for VCR displays and such, which limits the number of characters they implement.