- Resolution on Laser Discs
- Posted by John Manning on January 7th, 2004
Hi,
I have a Laser Disc player and a bunch of LDs that I wish to transfer to DVD
so that I can get
rid of the LD player and the LDs. What is the native resolution for output
from a LD player?
I don't wan't to waste space by capturing at a higher resolution than is
necessary.
Thank you,
John
- Posted by Pug Fugley on January 7th, 2004
If you're tranferring to DVD, capture at a DVD compliant resolution which is
720x480. It doesn't really matter what the laserdisc is, your DVD software
is going to have to convert to 720x480 anyway, and you will lose quality if
it's something other than that.
"John Manning" <john.t.manning@comcast.net> wrote in message
news:6hJKb.761762$Tr4.2171409@attbi_s03...
- Posted by Biz on January 7th, 2004
To answer the original question, LD's (without looking up the exact number)
are around 425 lines, compared to dvd which is 480, for proper dvd transfer
you need to capture it in 720x480(NTSC) or 720x576(PAL) like Pug says anyway
making it irrelevent.
Heres a linkd to LD specs...
http://www.blamld.com/LaserDisc/FAQ/FAQ_intro.htm
"Pug Fugley" <nosir@not.com> wrote in message
news:ynJKb.40492$Pg1.28166@newsread1.news.pas.eart hlink.net...
- Posted by Sal Minela on January 7th, 2004
704x480 is adequate, try 720x480 and you'll just see black space in the
overscan area that's the difference between the two. Haven't tried to author
a 704x480 capture to DVD, though, and since 720x480 is the DVD standard, you
just might have to capture the nonexistent overscan anyway. Don't imagine
mpeg2 would have trouble compressing the black space on either side.
"John Manning" <john.t.manning@comcast.net> wrote in message
news:6hJKb.761762$Tr4.2171409@attbi_s03...
- Posted by Jan B on January 7th, 2004
On Wed, 07 Jan 2004 02:13:00 GMT, "Biz" <nospam@worldnet.att.net>
wrote:
Just to be clear, this a resolution specification of analogue video
source meaning it is the number of black and white lines that can be
reproduced at a certain contrast.
compared to dvd which is 480, for proper dvd transfer
The corresponding horizontal resolution for DVD I've seen is 500
horizontal lines in full resolution.
At least my DVD-recorder has lower quality settings that reduces the
horizontal resolution to the half.
Then there is the MPEG data reduction that reduces image quality more
or less for different bit rates.
This is more difficult to quantify as it relates to perceived quality
and the ability to handle rapid movements in the picture.
The answer to John would be: Keep the DVD pixel resolution to maximum
and also keep the bit rate up.
A recording time (for a Philips DVD+RW recorder) of 2 hours (using
"PAL standard", corresponding to an average bit rate about 5Mbps,
looks good IMO.
Also 2.5 hours (4Mbps) is still high quality (by today's standard).
I suggest you make some tests with those settings.
/Jan
- Posted by Ken Maltby on January 7th, 2004
"Pug Fugley" <nosir@not.com> wrote in message
news:ynJKb.40492$Pg1.28166@newsread1.news.pas.eart hlink.net...
Why not capture a 1/2hr at each:
D1 720x480 @ 4500 kbps VBR
and at
1/2 D1 352x480 @ 4500 kbs VBR
then author and burn each to a CD as
UDF/ISO.
If your settop DVD player can play the
formats a $50 Norcent DP-300 can, you
can then compare the results as you well
be using them. If you just go by the image
you see on the noninterlaced high res. display
of your computer, you may see a difference
that you cannot see on your TV.
Luck;
Ken
