These are very common in Brazil. BTW, most tv chipsets made from 10-15 years to now can decode at least pal-m/pal-g/pal-n/ntsc. Seldomly they can decode SECAM.

Em 07/03/2018 07:49, Peter Corlett via cctalk escreveu:
On Wed, Mar 07, 2018 at 09:06:03PM +1300, Terry Stewart via cctalk wrote:
I'm assuming it's because composite input into "relatively" modern can handle
NTSC and PAL? Is this a reasonable thought? The UAV is not an NTSC converter,
and even the inventor was surprised this worked.

PAL is the superset of analogue TV standards. If one is building a TV which
already contains the expensive components required to decode PAL, tweaking the
constants to also decode NTSC is cheap and economies of scale may make it
cheaper than to make the set PAL-only.

It's been about 20 years since I last saw a nominally PAL TV which couldn't
also decode NTSC.


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