How is the video recorded on a DVD?

Discussion in 'Archived Threads 2001-2004' started by Jakob_S, Jan 26, 2002.

1. Jakob_S Stunt Coordinator

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I have a question on how the video/picture is recorded on a DVD.
Lets take an NTSC-DVD for an example...
NTSC have a resolution that is 720 x 480 pixels. But is the video/picture recorded with that resolution?
Ok...
When an anamorphic video/picture is recorded on a DVD it's still recorded with the resolution 720 x 480 pixels, right? (That is if the answer is 'yes' in the first question).
Well...
When you see a DVD on a Fullscreen Television, the TV displays the same resolution (720 horizontal pizel and 480 vertical pixels), right? Now let us take the anamorphic NTSC DVD as an example: The TV now squezes the video/picture together so it becomes a shape in the size of 16:9. Does the video/picture on the DVD still has the resolution 720 x 480 pixels? Well, but because the 4:3 Fullscreen TV has the 480 vertical pixels split over a larger area, then you aren't able to see the full resolution.
Am I right, or have I misunderstood something somewhere...?
I hope you clever guys out there can help me
NB! If my question is too difficult to understand (=not very well written) please let me know, so I can try to ask the question in a diffrent way...

2. Artur Meinild Screenwriter

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3. Jesse Leonard Second Unit

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A 4:3 television (that does not do the sqeeze) will not benefit from an anamorphic transfer. All DVD players have a menu option of which type of TV you have: 4:3 or 16:9. If you choose 16:9, the player does nothing to the image and sends it out to the TV. If you choose 4:3, the player will down-convert the anamorphic image to a nonamamorphic image (here is where you loose the vertical resolution).

4. Rob Lutter Producer

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5. Eric Huffstutler Screenwriter

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From what I am understanding what you are asking is if the "resolution" is reduced since the picture is downsized to fit a 4:3 television screen?

That is a law of physics. Your TV will not increase its pixel resolution just because the 16x9 image says it has more than what your picture tube can handle. Your television has a "fixed" resolution so if a picture is reduced in size to fit the screen, your resolution of the picture (sharpness) will also be reduced.

This is why I watch a majority of my DVD's on the PC since my monitor has a better pixel capability than my old 27" TV.

Also... one comment made here that ALL players have the capability to select 4:3 or 16x9 is incorrect.

There are some of us who are still using their 1st and 2nd generation DVD players which do not have a simple swicth mode button on them. I have to program my Toshiba to what kind of TV it is hooked to and if a 16:9 is inserted, the player works overtime downconverting.

6. Jakob_S Stunt Coordinator

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I'm glad you all actually undstood my question (I din't after reading it again ). Anyway, so the conclusion on this thread is, that in theory anamorphic images and non-anamorphic images look the same on a 4:3 TV. But because anamorphic images doens't take as much space as non anamorphic images, the bites are used better on anamorphic images and therefor the image becomes better looking overall. Is this statement correct?

7. Eric Huffstutler Screenwriter

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Jakob_S

Someone else here can answer that better than I can but I do know that if a DVD is spread out more over the disc (less compression) the better the picture quality... hence 2 disc sets with extras on the second disc.

What I thought you were asking was more along the lines of how you physically view a picture on screen if the movie was on disc in one format while your TV was in another with different resolutions between the two (16x9 -vs.- 4:3).

8. Jakob_S Stunt Coordinator

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Well, I guess my question/doubt is regarding this

9. Michael Reuben Studio Mogul

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10. Eric Huffstutler Screenwriter

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Michel, I stand corrected.
Looking at my Batman DVD which was one of the first, if not the first, mass market available titles Warner put out during their test market in March 1997, it says it is 16:9 enhanced.
As for the Toshiba player, I have a SD-2108. The 16:9 feature is there but only as an "option" you have to program as you set up what kind of TV you are hooking up to the player. It isn't a simple on-off button to switch modes.

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