I have a combo DTV converter / file reader (outside the picture). The base image was copied off the internet and I added the lettering in Photoshop, then copied the file to a USB stick to feed the converter.
EDIT:
CAUTION: In case you are thinking of buying one: The unit supplies 12 V power on the antenna input. You are supposed to be able to turn it off in the menu system, but it would reset itself to ON. I had to install a DC-blocking connector in the antenna feed.
The unit includes an RF modulator. You do not need a separate one.
