Questions about DVD resolution

[thelanx]

I had always thought that DVD's offered a better resolution than the 640x480 of normal television screens. I noticed that VCDs (mpeg1) videos looked fine on TV but looked like crap on my computer, while DVDs looked great even on my computer at 1028x(whatever widescreen res is). Since DVDs looked very sharp even at 1028x???, and DVDs store more data than vcds, I figured that vcds stored video at the standard TV resolution and DVDs stored video at a higher resolution. Now I just found out about HD-DVD and that DVDs only store video at 640x480? Then what resolution are vcds and svcds stored in? And what about public broadcasted programs? And why do DVDs look so sharp even at high resolutions on my computer? Thanks for any enlightenment you can provide.

 

[woowoo]

You always thought...........






Wrong

 

[thelanx]

Originally posted by: woowoo
You always thought...........






Wrong

Um, thanks for answering my questions...lol

 

[91TTZ]

TV isn't 640x480.

 

[BlueWeasel]

VCD:
1150 kbit/sec MPEG-1
352 x 240 pixels

SVCD:
Max 2600 kbit/sec MPEG-2 (Audio + Video bitrate max bitrate is 2778 kbit/s).
480 x 480 pixels

DVD:
Up to 9.8 Mbps* (9800 kbps*) MPEG2 video
Up to 1.856 Mbps (1856 kbps) MPEG1 video
720 x 480 or 704x480 pixels MPEG2 (Called Full-D1)

Notice the huge difference in bitrate between DVDs and SVCDs? The high average bitrate of 6000-7000kbps on a typical DVD (plus the higher resolution) is why DVDs look better that a 480x480 SVCD with a maximum bitrate of 2600kbps.

 

[Quasmo]

DVDs are 720x480 NTSC 30fps and 720x576 PAL 24fps both can be progessive scan, but on a normal TV are interlaced.

 

[thelanx]

Cool thanks guys, these stats are for DL I presume. So when ppl refer to 720i and 1080i they are refering to 1280x720 60i and 1920x1080 60i? And therse are the resolutions for HD-DVD right?

 

[RaiderJ]

Aren't DVD's normally interlaced and not progressive?

 

[nakedfrog]

Well done, gentlemen.

 

[eelw]

And when we move up to HD - 1280x720 & 1980x1080 with bitrates at typically over 10Mbps.

 

[BlueWeasel]

Originally posted by: thelanx
Cool thanks guys, these stats are for DL I presume. So when ppl refer to 720i and 1080i they are refering to 1280x720 60i and 1920x1080 60i? And therse are the resolutions for HD-DVD right?

Nope, the bitrate and resolution stats above for DVD are valid for both SL and DL media. The only difference is obviously DL media allows you to store more footage, audio, extras, etc, while still keeping a high bitrate.

 

[yukichigai]

Now you should know that DVD resolution isn't limited to 720x480/720x576. Most DVDs use this format, but some don't. (And a lot of the ones I make don't either) Valid DVD resolutions (NTSC) are:

720x480
704x480
352x480
352x240

352x240 is available in MPEG-1 and MPEG-2. All others are restricted to MPEG-2 only. 720x480 is the only resolution which can be encoded at 16:9; the rest have to be "letterboxed".

TV standard resolution is technically 320x240, though your TV crops the edges a bit. (usually 8 or 16 pixels from each side) Broadcasts are done at 352x240, for reasons I don't understand.

 

[frankgomez75]

DVD's are INTERLACED natively and NOT PROGRESSIVE
DVD's = 480i which are 720x480


You need either a Progressive Scan DVD Player or an HTPC to view DVD's Progressively.
Also, its nice if you have an HDTV that does 480P so with a Progressive Scan DVD Player you can watch the movies in 480P (progressive)

Now, if you have an HDTV with 720P or 1080i PLUS an HTPC than you can increase the resolution.

With my HTPC I use TheaterTek to Resize the DVD from 720x480 to a resolution of 1280x720 (my TV's native resolution). I also use DXVA, VMR9 Renderless and YUVMixing
Let my 6800GT take over the rest and watch DVD's in all its glory!

You can also use FFDShow to resize to whatever resolution your TV supports and sharpen the image with Lancoz 4

 

[MustISO]

Here's some information about interlacing and progressive scan:

http://www.hometheaterhifi.com/volume_7...chmark-part-5-progressive-10-2000.html

 

[Saint Nick]

what is a dvd </nef>