[pvrusb2] Anyone here able to test the pvrusb2 driver in Japan?

[Mike Isely]

On Sat, 22 Apr 2006, Frans Meulenbroeks wrote:

> Mike,
>
> 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
> http://en.wikipedia.org/wiki/NTSC
>
> 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

Well, except there is a specific bit allocated in V4L to represent a 
Japanese variant of NTSC.  I don't disagree with you that the difference 
is perhaps so minor as to be ignorable, however this is also telling me 
that it's probably just fine to have that bit set when NTSC-M is 
available.

   -Mike

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