channel 4 hd

[chrishull3]

regarding the new channel 4 broadcasts i understand some programns are produced in hd but how can some be converted to hd.i wish all my old analogue even standard mini dv could be, i know it cant though,so how can they.here is a link.

http://www.hdtv-news.co.uk/2007/09/2...4-hd-channels/

[Starburst]

The generally accepeted alternative to native HD productions (film or digital video) is the upscaling of SD productions to HD resolutions, it's not "proper" HD but then there are no regulatory definitions of what HD is in broadcast terms.
That is why SKY1HD and CH4HD can combine native and upscaled HD yet carry the HD tag in the channel name not to mention the use of HD in marketing basic DVD players with scaling capabilities, as always it's up to the viewer/consumer to do a little research before spending their money

That said hundreds of thousands of pounds of HD playout/scaling and encoding hardware will do a better job than a £1000 PC or £100 DVD player but the basic results are the same, SD resolution upscaled to HD resolution and the higher the SD quality the better the result will be.

[chrishull3]

Originally Posted by Starburst

The generally accepeted alternative to native HD productions (film or digital video) is the upscaling of SD productions to HD resolutions, it's not "proper" HD but then there are no regulatory definitions of what HD is in broadcast terms.
That is why SKY1HD and CH4HD can combine native and upscaled HD yet carry the HD tag in the channel name not to mention the use of HD in marketing basic DVD players with scaling capabilities, as always it's up to the viewer/consumer to do a little research before spending their money

That said hundreds of thousands of pounds of HD playout/scaling and encoding hardware will do a better job than a £1000 PC or £100 DVD player but the basic results are the same, SD resolution upscaled to HD resolution and the higher the SD quality the better the result will be.

thanks for the reply,i cant see any difference in upcsaled dvd on my ps3 though as you say thier expensive equipment is different but you cant turn a 50 pence coin into a pound and it would be interesting to know the lowest quality they can improve.

[Sonic67]

35mm Film is at a high resolution downscaled to fit your SD TV.

In HD it's not downscaled so much. So a film like The Great Escape which is an old film can come out on HD. It's not upscaled. So you might find a huge back catalogue of old films and TV programmes reappearing in HD.

ITV's HD channel used to show re-runs of 'Space 1999' and 'Jesus of Nazareth'.

[chrishull3]

Originally Posted by Sonic67

35mm Film is at a high resolution downscaled to fit your SD TV.

In HD it's not downscaled so much. So a film like The Great Escape which is an old film can come out on HD. It's not upscaled. So you might find a huge back catalogue of old films and TV programmes reappearing in HD.

ITV's HD channel used to show re-runs of 'Space 1999' and 'Jesus of Nazareth'.

yes 35 mm film can always be upscaled for my hd plasma its all the other programns not made in 35mm or hd i find confusing.they do seem to say everything will be converted to hd,probobly only programns that can be converted will go on the channel 4 hd servise .all the best.

[ndenbow]

Just to be clear - 35mm film is a MUCH higher resolution than current HD can handle, the same as 35mm still images are much higher resolution than any production digital camera.

Anything shot in 35mm can be converted (downscaled) to HD video. Anything shot on VIDEO will be subject to the quality of the source.

[reggieroo]

Originally Posted by Sonic67

ITV's HD channel used to show re-runs of 'Space 1999' and 'Jesus of Nazareth'.

ITV's HD channel?

I didn't know they had a HD channel

[Starburst]

Originally Posted by reggieroo

ITV's HD channel?

I didn't know they had a HD channel

When the BBC trialled HD on Cable (TW) and DTT (London area) Ch4, Five and ITV provided content.
ITVHD on Satellite (Freesat and SKY) and VM is expected to launch proper in the first half of this year.

[Hillskill]

Some info for you guys (and girls)

A telecine is used to transfer film (typically 35mm and 16mm) to video. It is generally regarded that 35mm has an unlimited resolution based on the idea that if you have a powerful enough equipment to scan you could set any resolution you desire.
Every Hollywood studio has a vault full of master reels of its back catalogue. These can be re-telecined and scanned at 2k or 4k (sometimes super 2k which is a scan at about 3 or 4 thousand lines and ten downsized to 2k for added quality !!!) This new 2k scan can be re-graded (coloured) for a new theatrical release or for a downconversion to HD for mastering to blu-ray. Film is the only format that can be truly re-scanned into HD. Any back catalogue material that only exsist in standard definition can only be upscaled hence why most new TV productions this year should be in HD.

So in theory if a film has been loved and stored correctly it can be re-released in HD.

[gary99129]

Originally Posted by Hillskill_79

Some info for you guys (and girls)

It is generally regarded that 35mm has an unlimited resolution based on the idea that if you have a powerful enough equipment to scan you could set any resolution you desire.
.

I doubt it can be unlimited (just like in Photography how a 35mm negative can be blown up so far), but it far exceeds 1080p.

However a lot of film is damaged in some way with scratches and dirt, so this needs cleaning up to make a perfect transfer. Even my DVD of Happy Gilmore has a scratch in a couple of frames and that's a recent movie.

[Hillskill]

Originally Posted by gary99129

I doubt it can be unlimited (just like in Photography how a 35mm negative can be blown up so far), but it far exceeds 1080p.

However a lot of film is damaged in some way with scratches and dirt, so this needs cleaning up to make a perfect transfer. Even my DVD of Happy Gilmore has a scratch in a couple of frames and that's a recent movie.

Majorly delayed reply to this post ! lol

The potential resoloution of the Neg is limited only by the technology used to scan it. So ten years ago we could only scan Standard Definition Images now we scan and master feature films in 2k or 4k. This is then edited in a "Digital Intermediate" enviroment. Simply meaning you are working with data rather than handling Neg. We can digitally dust bust,repair scratches etc.
Happy Gilmore would almost certainly have been mastered before DI workflow was introduced and the DVD would have been encoded from a SD telecine transfer.