"Stutters" in DVD playback

[Kruse]

Hmm...

I'm getting a little confused here. I believe I read somewhere that the contents of a DVD is always encoded at 24 fps regardless of region?

Does anyone here have the insight to explain to me what the deal is with 24 fps, PAL, NTSC, interlacing and DVD Genie's "3:2 pulldown reconstruction" setting?

My TV is a piece of junk that doesn't support SVHS or NTSC or RGB input, so until I can afford a new one, i'm gonna have to live with PAL/Composite.

[Kristian]

Hi there Kruse, I'll try to answer some of your questions.

PAL (Phase Alternating Line) is the european tv-system invented in the early 60's. Also considered to have clearer and sharper image than NTSC. PAL runs at 25 fps and with 625 lines/frame.

NTSC (National Television System Committee). First broadcasted in 1953 - a technique adopted by almost all countries in the western hemisphere. NTSC runs at 29.97 fps (30) and with 525 lines/frame.

Stuttering occurs when the extra 5 frames per second in NTSC needs to "dissapear" for the image to be shown correctly in PAL systems.

I stole this explanation from the following adress:
http://burks.bton.ac.uk/burks/foldoc/28/55.htm

<u>INTERLACING</u>
The complete image (a "frame") is created by scanning an electron beam horizontally across the screen, starting at the top and moving down after each horizontal scan until the bottom of the screen is reached, at which point the scan starts again at the top. On an interlaced display, even numbered scan lines are displayed in the first field and then odd numbered lines in the second field.

For a given screen resolution, refresh rate (frames per second) and phosphor persistence, interlacing reduces flicker because the top and bottom of the screen are redrawn twice as often as if the scan simply proceded from top to bottom in a single vertical sweep.

I couldn't find any good explanations about the 3:2 pulldown though, sorry

I would also like to say that my brand new JVC 32" WideScreen with NTSC 3.58 completely fixed the stutter in region 1 discs

Regards

Kristian


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Striving for perfection


[This message has been edited by Kristian (edited 07 March 2000).]

[antdude]

Wombat: It is probably Macrovision. Get a crack for your software player to disable it or get a RF Modulator (a little TV box) from Radio Shack or whatever. Are you hooking the TV out to a VCR then to TV? I had this setup but the Macrovision bugged me (pulsating picture is annoying).

For people with problems with choppy video on TV, have you tried playing VCDs or anything like that? Is it choppy or smooth? Mine is smooth. Only DVD is choppy. I guess DVD have more FPS. Is this technically right?

Thank you in advance for replies.