Posted by Roderick Stewart on 10/12/06 11:42

On Wed, 11 Oct 2006 17:21:50 GMT, Jeff <j@donotspam.me> wrote:

>>
>> And what frame rate will "true" high definition have in order to be
>> universally compatible?
>>
>> 24fps to be compatible with the cinema? 25fps to be compatible with
>> European television? 30fps to be compatible with American television?
>>
>> Rod.
>>
>
>A "smart" high def TV would be able to change the frame rate to match
>what you are watching. There is no reason a digital TV couldn't
>generate its own scan frequency without relying on the frequency of the
>AC supply like analog does.

They already do. My TV set switches automatically between 625/50 and
525/60, which enables me to watch foreign recordings, but broadcasters
currently produce all their output in one standard or another, having
to convert any material supplied on a different standard from the one
they are required to use. Are you suggesting that broadcasters should
abandon this standardisation and viewers should be required to
re-equip with multiscan displays?

I've never heard of a TV set that used the frequency of the mains AC
supply for anything. Scanning waveforms are generated from oscillators
that have to be locked to the incoming signal.

Rod.

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