PAL, NTSC and interlaced/progressive

A

Alc

Guest
I'm not sure this is exactly the right place, but I couldn't find anywhere more suitable.

Old games devices, the NES for instance, generate a progressive 256x240 signal internally (or similar). When this is transmitted via NTSC/PAL, is it interlaced up to 480i, or do the standards support LDTV progressive modes of some kind?
 

bsuttie

Active Member
I believe that in the days when consoles like that were around TVs were just that and expected to be fed an interlaced signal approximating to broadcast standards. They would just read the data out at the right frequency for each line, then repeat it for the second field (for NTSC).

When switched to PAL they would either up the lines to 288 or pad them out with black.

regards

Brian
 

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