[quote user="JSM15"][quote user="bf1"]
ÿFor those with this set and hooked up to Sky HD I would be interested to know what your picture output is set to.
The Sky engineer set mine to 1080i but I see that there is a choice of 576, 720 & Auto.
What`s the best to set it to?ÿ
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Speaking generally (i dont have Sky HD but i do have an upscaling DVD player), 720p is best for a lot of movement and 1080i would be best for quite static stuff such as Sky News and all that daytime tv stuff i.e. Jeremy Kyle, though would suggest 720p for Jerry Springer due to the speed that security move in
Not really sure how AUTO works with regards to what factors determine what the Sky box sets the resolution to etc, so someone else will have to answer that one.ÿ
JSMÿ
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From the point of view of upscaled DVD video, you're quite right (subject to the resolution of the TV, of course). But Sky's HD box is rather different. The overwhelming majority of broadcast HD content on the Sky platform is in 1920 x 1080i - I've yet to encounter something in 720p, and if anyone knows different, I'd love to hear about it.
This isn't necessarily an issue of technical merit, by the way: as you're pointing out, JSM15, a progressively scanned signal (720p) would tend to deliver smoother movement than an interlaced one. It's more a matter of broadcasting convenience (the availability of HD cameras, of existing 1080i content and so on).
So, with 1080i being the order of the day, my advice is to output your HD picture signals in that form and leave your TV to scale them as appropriate. Scaling the signal down to 720p inside the Sky box will work, in that it will produce a viewable image - but often, it will mean you've introduced still more scaling into the video signal path. Once a 1280 x 720p signal arrives in the TV, it will almost always need to be adapted again to suit the native resolution of the TV itself: for example, a 1366 x 768 LCD TV will still have work to do, as will a 1024 x 720 or 1024 x 768 plasma. So, select a 720p output, and you're effectively scaling your HD pictures twice!
That's where the Auto mode comes in. You'll be watching a mix of vision content: some SD (720 x 576), some HD (1920 x 1080). Select Auto, and the Sky HD box will output each signal in its native form, leaving the TV to adapt its scaling to suit the incoming signal.
So why do Sky engineers select the 1080i mode? Essentially, because it ensures your TV is presented with one consistent resolution by every channel you watch. With 1080i engaged, the Sky box will apply its own video scaling to 576-line video, thus outputting ALL forms of video in 1080i. This isn't necessarily purist - for one thing, the quality of the scaling job isn't that great, and many modern TVs will do it better -ÿbut it IS convenient. Some older plasma panels (my old Fujitsu, now retired, for one) could get confused by sudden changes in resolution, and would lose 'lock' for a few seconds before reacquiring the new signal. Sky reasoned, probably correctly, that this could well cause some prospective buyers some annoyance. However, with newer sets (such as my new Pioneer) there's no problem using the Automatic mode, and that's what I'd urge you to do.