camera FPS and TV frequency at
DV Info Net

Go Back   DV Info Net > The Tools of DV and HD Production > Open DV Discussion

Open DV Discussion
For topics which don't fit into any of the other categories.

Thread Tools Search this Thread
Old September 2nd, 2007, 10:29 PM   #1
Regular Crew
Join Date: Mar 2006
Location: Yaad, Galilee
Posts: 117
camera FPS and TV frequency

What happens when I play NTSC HDV footage on a PAL TV (both 60i and 30p)?
I am living in PAL country but the TV's play PAL DV footage as well as NTSC footage. On DV, there was a justification to by a PAL camera because of the picture size and hence a better resolution.
On HDV the frame size is the same (correct?)for both NTSC and PAL, so the difference is in the frame rate.
So would a 60i look worse than 50i on a PAL TV (I think 50Mhz or 100Mhz) ?
What about 30P vs 25p?
I guess that the progressive footage will look the same, but I would like an explanation for the interlaced footage.
Sassi Haham is offline   Reply With Quote
Old September 5th, 2007, 06:54 AM   #2
Inner Circle
Join Date: Aug 2005
Location: Atlanta/USA
Posts: 2,515
Basically if the TV is dual system, it switches between the two to adjust to the source video and display full quality - this is if you connect your camcorder directly to it. But if you play a DVD, the story might be different; the DVD player might transcode the video from one system to the other, in other words you will be able to play an NTSC DVD on your PAL TV thinking that your TV is dual system when in reality your DVD player is dual system and your TV is PAL only. I have the reverse situation, my TV is NTSC only but I can play PAL DVDs on it because my DVD player will transcode them to NTSC.

50 MHz or 100 MHz has no place in this picture! Maybe what you're trying to say is that PAL is 50 Hz (Hertz, not MegaHertz!) vertical refresh rate while NTSC is 60 Hz in order to display 50 interlaced fields (25 frames if progressive) in PAL and 60 interlaced fields (or 30 frames if progressive) in NTSC.

So in the end the difference is that in NTSC you have 5 more frames per second in HDV NTSC compared to PAL - this will give you a little more temporal resolution, in other words your movement will be smoother... but 9 out of 10 people will never notice the difference.

There are other differences you may want to consider - PAL has better color space, but that's an entirely different story.
Ervin Farkas
Ervin Farkas is offline   Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

B&H Photo Video
(866) 521-7381
New York, NY USA

Scan Computers Int. Ltd.
+44 0871-472-4747
Bolton, Lancashire UK

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > The Tools of DV and HD Production > Open DV Discussion

Thread Tools Search this Thread
Search this Thread:

Advanced Search


All times are GMT -6. The time now is 08:01 AM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2024 The Digital Video Information Network