HD VHS/DVD Question


The presently available and for quite a while into the future, the HD format for HD-VHS and for HD-DVD is “1080i”. Just like it is possible for 24 fps film recorded in “480i” to be weaved into “480p” signal, IS IT POSSIBLE to weave “1080i” film recording into “1080p”??

Thanks.

Rana

Yes it's possible;

http://www.faroudja.com/products/dvp.dvp5000.html

.. although inherently by specification I think all D-VHS material at the moment is 1080i.

Ali

Do these D-VHS tapes have 48 half frames per second or 60 fields per second?

Yes, you can process 1080i from film sources or video
cameras into 1080p with the Faroudja 5000. There are
other devices that do 1080i to 1080p (Dune, Terranex...).
The D-VHS with 1080i is 60 half frames per seond. A film
source with 24 frames is output with 2-3 pulldown to get
60 half frames (same as on DVDs).
1080p is nice but very few displays can resolve it. Only
professional HD monitors, 9 inch CRT projectors and one
D-ILA by JVC.
1080i looks already stunning if you keep a distance of
~3 screen heights. Closer you see scanlines on a CRT and
minor interlacing artifacts.
cheers
Michel

Rana,
I believe you got the answer. But on a related note please check this article on Interlaced Vs Progressive: 1080I is not as good as 720P.
http://alvyray.com/DigitalTV/Naming_Proposal.htm

Well, that debate goes on and on. Both formats have their pros and cons. I personally prefer 720p to 1080i.

Unforunately, 720p is not likely to be the winner as almost everybody who matters (studios) is preferring 1080i. The reason is simple, for a lower scan rate (540 as opposed to 720) they transfer lot more pixels (1920 x 1440 vs 1440 x 768) with 1080i, as compared to 720p, for a given band width at the cost of interlacing artefacts. As Michael mentioned above, the interlacing artefacts are minor as the resolution is high.

I don't mind 1080i for Film material as it can be converted to 1080p which is better than 720p. May be, by the time HD-DVD becomes common, 1080 x 24p, or higher resolutions @ 24 frames per sec, might pick up (for 24 frames per sec film).

Rana