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Originally Posted by richard plumb agree. Can skyHD technically accommodate 60Hz? |
No idea what the receiver would do - but no broadcaster is going to run a channel that changes frame rate. The playout area has to have a fixed frame rate for all sorts of reasons - and watching a channel which changed framerate would be pretty unpleasant (you'd get all sorts of on-screen graphics and blank screens appearing on the frame rate change).
Imagine trying to mix from the 50Hz BBC HD ident to a 60Hz show - that would be "interesting"...
Also it would cause real problems for channels that are simulcast in 50Hz SD.
It isn't going to happen anytime soon - even if the receivers could cope with it - particularly as the same playout areas will be producing a channel that needs to be compatible with Freeview HD and freesat HD receivers as well.
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As the HD ready spec requires support for 60Hz (at least I think it did), all TVs hooked up would handle it.
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HD Ready mandates 480/60i, 480/60p, 720/60p and 1080/60i support - so yes 60Hz is part of the spec. It has to be as BluRay and HD-DVD players output 24fps content at 60i or 60p - and most BluRay and HD-DVD SD extras were 480/60 not 576/50.
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Why wouldn't you want to watch something in the correct native format?
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In an ideal world you would - but it isn't practical or feasible to run networks at multiple frame rates. If it were the US would broadcast 24p content in 24p not 60i or 60p as they have to.
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What happens when the BBC produces material on tape for export - does it look similarly bad in the US?
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Drama and documentary is normally shot at 25p (i.e. 25 frames per second progressive). This is usually slowed down to 24p for the US market - so shows run a bit longer, and the audio is slower (though pitch corrected) - but it means the picture quality is identical to that of a US show shot at 24p. (The same thing happens in reverse when the BBC show Damages, or C4 HD show Desperate Housewives. The US 24p stuff is sped up to 25p - so shows run shorter, the audio runs faster, but again is hopefully pitch corrected)
However for sport, and music (and some drama and documentary shot at 25p but delivered in 50i) a real-time conversion is applied - just as is happenin for the Golf. This has similar motion artefacts - though the newer converters - as being used for the Golf, are massive improvements on the earlier models.
You've got to feel sorry for the US - the 2000, 2004, 2008 and 2012 Olympics are all 50Hz - so for years they will be watching the Olympics standards converted, in both SD and HD.