Progressive Scan / Line Doubler Question
J & Kath Peer
any difference between using that with a line doubler and sending the
doubled output to a datagrade projector and taking the output from a
progressive scan player straight into a datagrade projector.
I've toyed with waiting for a progressive scan player (which look like being
expensive) or with jumping in and getting the 725 now that you can get one
modded for all regions at around 500 quid.
Would there be a significant difference in quality between the two setups.
Also, does anyone know if there is software available to allow you to use a
pc as a line doubler. I guess with all the video capability these days, this
shouldn't be too hard to do.
Any advice gratefully received.
Cheers,
Justin.
Stuart Wright
news:380b3...@news2.prserv.net...
> If you have a player with component outputs such as the sony 725, is there
> any difference between using that with a line doubler and sending the
> doubled output to a datagrade projector and taking the output from a
> progressive scan player straight into a datagrade projector.
Can only share my experience. I have an MPACT Diva progressive scan DVD
card in a PC output to a Barco Data grade CRT. I use the VGA output at
72Hz.
The progressive scan output is incredible. Definately better than a normal
DVD player through the line doubler.
The stand alone DVD player i used for comparison, BTW, was an early
prototype of the 'Beast' budget but high quality machine mentioned on Lee's
DVD Debate and to be released soon. (Slight delay altering it to play
Matrix etc ok)
Of course since my projector disables the doubler for the RGB inputs, the
stand-alone player was connected via S-Video so it was at a disadvantage
already. However, with a doubler active, there are still 'jagglies'
visible occasionally. White shirt collars, for example (bright diagonal
lines) have a slight stepped look to them.
Absolutely none of these are visible from the MPACT. The only disadvantage
of the MPACT is that it's 16bit so you very occasionally see a slight
stepping of colours when there are long gradients. There are ways round
this which I haven't looked into, though.
Check out my website for some screen captures.
http://ds.dial.pipex.com/stuw. Look in the 'interests', 'home cinema' and
then 'DiVA' link.
>
> I've toyed with waiting for a progressive scan player (which look like
being
> expensive) or with jumping in and getting the 725 now that you can get one
> modded for all regions at around 500 quid.
>
Depends on how desperately you want a player. I personally would advise to
get an MPACT (only £140 delivered) in a PC and enjoy progressive scan with
that until a progressive scan DVD player comes out.
> Would there be a significant difference in quality between the two setups.
Yes, for a perfectionist like me, the MPACT is closer to a cinematic image.
>
> Also, does anyone know if there is software available to allow you to use
a
> pc as a line doubler. I guess with all the video capability these days,
this
> shouldn't be too hard to do.
>
Well the MPACT does a better job.
www.digitalconnection.com
(I don't work for them or anything - I just have one and it's ACE).
Peter Petley
can convert SVHS output to progressive scanning and is said to be really
good.
the amazing dr. j
wrote:
>If you have a player with component outputs such as the sony 725, is there
>any difference between using that with a line doubler and sending the
>doubled output to a datagrade projector and taking the output from a
>progressive scan player straight into a datagrade projector.
Depends on the doubler. The more expensive faroudja models do 3/2
pulldown flag detection, meaning they reconstruct the progressive scan
picture that's originally on the disc. The cheaper doublers
interpolate the progressive picture, resulting in a softer picture
with lots of artifacts.
Otoh, none of the soon to be available progressive scan stand-alone
dvd players offer native progressive scan, they all use some kind of
scan doubler/interpolator/whatever to produce a 480p picture.
So for now your best bet is still the mpact 2 pc decoder, or for the
more adventurous something like a matrox g400 with windvd or
cinemaster running on at least a 450 mhz system.
>I've toyed with waiting for a progressive scan player (which look like being
>expensive) or with jumping in and getting the 725 now that you can get one
>modded for all regions at around 500 quid.
Personally i can't wait to get rid of the pc gear in my home theater,
so when true progressive scan stand-alone players hit the market i
will get one asap. Until then the mpact 2 has to do, it's still the
best picture i can afford.
>Would there be a significant difference in quality between the two setups.
>
>Also, does anyone know if there is software available to allow you to use a
>pc as a line doubler. I guess with all the video capability these days, this
>shouldn't be too hard to do.
Most tv cards with an s-video input can do that. The hauppauge for
example. Picture quality is VERY bad though.
Hope this helps.
--
jeroen - the netherlands - www.xs4all.nl/~nbk94
I saved Latin. What did you ever do? - max fischer
Gordon Fraser
<ppe...@hotmail.com> writes:
>DVDO I scan plus
>can convert SVHS output to progressive scanning and is said to be really
>good.
I saw one of these at a trade show last June. Seleco have the European rights
to it I believe. The PAL versionis not available yet. It is giong to be
incorporated on to an internal doubler card for their new SVD800HT projector.
The one I saw was an original NTSC unit. It was compared with a DEUCE scaler.
The DVDO was better IMHO. No jaggies. I beleive it has 3:2 pull down.
No doubt Chris from Owl will correct any mistakes I have made.
All the best
Gordon
StereoStereo: Intelligent Solutions for Intelligent Homes
260 Saint Vincent St
Glasgow 0141 248 4079
10-6.00pm Closed Tuesday and Sunday
David Perry
writes:
>On Mon, 18 Oct 1999 18:36:54 +0200, "J & Kath Peer" <jk...@ibm.net>
>wrote:
>
>>If you have a player with component outputs such as the sony 725, is there
>>any difference between using that with a line doubler and sending the
>>doubled output to a datagrade projector and taking the output from a
>>progressive scan player straight into a datagrade projector.
>
>Depends on the doubler. The more expensive faroudja models do 3/2
>pulldown flag detection,...
That's all Faroudja models, with better algorithms used in subsequent model
updates over the years.
3:2 pulldown flags are not detected as they are not present in the analogue
video signal. Other methods are employed to recognise the sequence as well as
breaks in the sequence such as bad video edits and changes to/from 3:2
pulldown, 2:2 pulldown and interlaced video.
David J Perry
Remove .NJM from my email address to reply to me.
David Perry
>Players with progressive scanning are expensive however the DVDO I scan plus
>can convert SVHS output to progressive scanning and is said to be really
>good.
>
That's S-video not SVHS. The DVDO iscan is great for the price and its 3:2
pulldown sequence detection works well, and is what makes the biggest
difference between it and models costing 10x as much.
However, it is NTSC only, has not component or RGB input and no picture
controls.