English NTSC TV's.

[dieseljeep]

Originally Posted by wa2ise

Back in 1996 I worked for Samsung developing a multistandard decoder chip. KS0127 datasheet. If the burst changed frequency line to line, it was SECAM. If the burst frequency was steady, and line to line phase was 180 degrees flip. it had to be NTSC, if it was (something like +45 and -45 IIRC), it was PAL. And we'd switch in the appropriate processing. Our chip could handle a variant of NTSC running at 4.43MHz subcarrier, or PAL with a subcarrier at 3.58, though few if any countries broadcast those. We PLLed on the horizontal line frequency and used counters to identify the burst subcarrier frequencies.

I looked the data sheet and it's really impressive!
It took a group of highly-gifted engineers to come up with that scheme.