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High Definition Television (July 2005)

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FL
Flava
I have to say, I like the filmic look on H&A, maybe it's just me.
HA
harshy Founding member
All New Johnnyboy posted:
Flava posted:
Be warned that the 1080i/25 version of HDTV involves film effect!

The Aussies are currently using HD - infact Home & Away is filmed in 1080i/25, which will give you an idea of what the "film effect" thing looks like.


I only catch it occasionally when I'm channel surfing, but the Home and Away picture doesn't strike me as being great.


Well it's compressed for SD broadcast, then compressed again for the satellite above, so by now the picture is poor.
DA
davidhorman
Quote:
Note that even for the lower quality HD video a video card is ESSENTIAL


A video card is essential for just about everything... Very Happy

There are some more examples in WMV format here:

http://www.wmvhd.com/

Dolphins is the best one I've seen. On a 1280x1024 TFT monitor the pictures even begin to take on a 3D quality - it's pretty amazing. But the files are correspondingly large - upwards of 100mb for just a few minutes.

You can even buy Terminator 2 in this WMVHD format - the trailer was impressive.

David
NG
noggin Founding member
Flava posted:
Be warned that the 1080i/25 version of HDTV involves film effect!

Nope - wrong.

1080/25p - which is what Home and Away is shot (but not edited) in includes the film effect. (This is a 25 frame per second progressive format)

1080i/25 is another (confusing) way of writing 1080/50i - which is an interlaced version and carries 50 fields per second - and thus has identical motion rendition to normal TV - and NO film effect.

The Proms coverage shown on BBC One, Two and Four is being shot in 1080/50i (aka 1080i/25) and this has no film flicker.

Quote:

The Aussies are currently using HD - infact Home & Away is filmed in 1080i/25, which will give you an idea of what the "film effect" thing looks like.

As I have said - H&A is shot 1080/25p NOT 50i (or i/25 as sometimes confusingly used for short hand)

1080/25p is the same frame rate as film - and as you have pointed out gives film flicker.

However there are NO proposals to broadcast in 1080/25p - in fact the Sky HD receivers will only support 720/50p and 1080/50i - neither of which force you to have "film flicker".

Home and Away and other HD drama specifically chose to shoot at 25p because they want the film flicker effect - but it isn't compulsory.

In fact H&W is not edited HD - or it wasn't when they moved to shooting HD. Instead it is shot 1080/25p, downconverted to 576/25p (which can be carried in the same cabling and recorded on the same kit as 576/50i standard def) edited using standard def kit (with care taken not to filter the image vertically to reduce the resolution to 576/50i interlaced)

In the UK we get a 576/50i copy of the 576/25p edit (which may have been vertically filtered to make it more interlaced friendly)

In Aus the show is frame doubled to 576/50p - but with no interpolation - 576/50p is a "pseudo"-HD format - it is called HD in Aus, but other countries would describe it as "ED" (as the US describes their similar 480/60p standard until recently used by Fox - who are now 720/60p)

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