DVD - getting the most out of SD DVD

digit · Post by **digit** » Tue Nov 21, 2006 5:24 pm

Do the plasma set use line doubling when displaying the SD TV signal that has been cut to letterbox? By my calculation the number of active vertical lines in an SD letterbox is only 360. Expanding a letterbox to fit a 50 inch plasma would not look good, but if line doubling were used there would be 720 lines.

Richard · Post by **Richard** » Thu Nov 23, 2006 9:46 am

Hi Digit,

Line doubling comes from scaling 480I to 480P and the term is a product of the early days of HDTV. When you take 480I SD and scale it to 720P, 1080I or 1080P you are no longer doubling because those are odd numbers for 480I. Bottom line, the correct term is scaling and anything that is not the native scan rate of your display will have to be scaled.

SD - Standard Definition on your HDTV
viewtopic.php?t=4451

Scaler
viewtopic.php?t=3789

By my calculation the number of active vertical lines in an SD letterbox is only 360.

SD DVD is actually a native 16:9 format, not 4:3. Based on your response it sounds like you have your player set for 4:3 and you are taking a huge hit in performance running it that way. 16:9 and component video cables are required but...

OAR, Original Aspect Ratio - Black Bars and Burn-in - 5th post down
viewtopic.php?t=3182

... you will get far better imaging using an upscaling DVD player

Upscaleable DVI/HDMI enabled DVD Players
viewforum.php?f=97

Reviewed and Recommended...
Oppo Digital OPDV971H 720p/1080i Upconverting DVI DVD Player
viewforum.php?f=109

DavidJones4 · Post by **DavidJones4** » Tue Jan 15, 2008 4:32 am

Quick question.....is analogue always 4:3?
If so, does this mean that any recording device that only has an analogue tuner{DVDr}, can only ever record in 4:3..?

akirby · Post by **akirby** » Tue Jan 15, 2008 7:40 am

Basically - yes.

DavidJones4 · Post by **DavidJones4** » Tue Jan 15, 2008 2:22 pm

Thanks