[pvrusb2] Anyone here able to test the pvrusb2 driver in Japan?
fransmeulenbroeks at yahoo.com
Sat Apr 22 13:56:43 CDT 2006
I don't live in Japan, but I have a fair knowledge of
TV standards and I have never heard of NTSC-J.
Decided to google for this and wikipedia said\ on
Unlike PAL, with its many varied underlying broadcast
television systems in use throughout the world, NTSC
color encoding is invariably used with broadcast
system M, giving NTSC-M. Britain once contemplated
introducing a 405-line NTSC-A system on top of its old
black-and-white television system, but the proposal
was eventually scrapped in favor of the incompatible
PAL-I. Only Japan's variant "NTSC-J" is very slightly
different: in Japan, black level and blanking level of
the signal are identical (at 0 IRE), as they are in
PAL, while in American NTSC, black level is slightly
higher (7.5 IRE) than blanking level. Since the
difference is quite small, a slight turn of the
brightness knob is all that is required to enjoy the
"other" variant of NTSC on any set as it is supposed
to be; most watchers might not even notice the
difference in the first place.
I guess in Japan NTSC-M will do.
Best regards, Frans
--- Mike Isely <isely at isely.net> wrote:
> I've noticed that PVR USB2 devices for NTSC are
> actually marked NTSC and
> NTSC-J, which I interpret to mean a Japanese variant
> of NTSC. However
> tveeprom isn't reporting that standard variant as
> supported. I suspect
> tveeprom might be wrong in this regard so there's a
> special case in the
> pvrusb2 driver right now to enable "NTSC-Mj" any
> time "NTSC-M" is seen in
> the driver.
> But this is a bit of an experiment that I can't
> verify or falsify because
> I don't live in Japan. Is there anyone here who can
> verify that this
> works? Or maybe it's just best to take the special
> case out until someone
> in Japan complains...
> | Mike Isely
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