Can anyone explain the difference between Pal and NTSC?
Answer:
I thought I would not have to go through all this again and explain the difference between PAL and NTSC, The reason no one has answered your question so far and explained the difference is because none of them know , that includes Simple T . Ok here goes !
PAL is short for " Phase alternating line "
NTSC sometimes ( much to the disgust of the Yanks ) is called " Never twice same colour " .
Here are the bare bones of each system !
NTSC is prone to colour changes in the received picture due to phase errors in the transmission path from transmitter to receiver. I wont get too technical here !
PAL was developed after NTSC to overcome these problems, ( A Dr Bruch of Germany developed it ) ,
what happens is that the colour information is stored in a delay line and then is compared to the next line, if a difference exists then the next line gets a correction signal added to it which makes for an average , the eye can not distinguish the change as the human eye only sees the average.
Right then an NTSC set does not have a chroma delay line.
The PAL set does have a chroma delay line. It is the delay line then that is the heart of the PAL system ! Absolutely nothing to do with mains supply volts or frequency or frame rates or anything else . Cheers Pete
PS. for the technically minded though here is a bit extra.!
In Pal The phase of the red signal is changed by 90 deg relative to the blue signal on alternate lines hence Phase alterating line !!
There is also a " burst signal ' which is 45 deg relative to the red , they called this the swinging burst which when rectified provides a voltage known as the colour killer. If the TV only recieves a B/W signal then the burst signal is missing and the colour killer will operate resulting in a black and white pic.
Ok then if anybody is still awake I will sign off. Cheers Pete
Pal is used in europe, and other countries. NTSC is used in usa and other countries. Another one is SECAM. If you were to bring your TV in europe, and try to use it there, it wouldnt work, because they use PAL, and we use NTSC
Pal is used in Europe and NTSC in North America.
It is actually to do with the mains voltage which is very different in N.America to the EU.
Pal= 50Hz
NTSC= 60Hz
I believe.
To make sure that all TVs can receive the television broadcasts, standards are created, so cameras and other recordings, signals broadcasted can create and send the programs and the TVs can receive and display the programs.
PAL is a standard through much of Europe, SECAM is another standard in some of Europe (like Hungary and others and some middle eastern countries). And UNTIL FEB 18, 2009, NTSC is the standard in the U.S.
One standard of NTSC is that it sends picture to run at 60 Hz, which corresponds to the measurement for our electricity here. It also means that video runs at 60 fields or frames per second. Another standard is the resolution (we hear a lot about that when talking about HDTV, high definition). NTSC has a maximum of 525 lines of resolution (maximum shown onscreen is 480 lines with the rest used for technical instructions for your TV.)
For PAL the standard is 50 Hz and is 625 total lines and 576 lines that can be displayed onscreen.
(there are a few contries that have "PAL M" which is at 60 Hz also.
All media that is broadcast and all DVDs, videos etc are set to show on one standard or the other.
High Definition and digital Television is ATSC and is the standard that will take over for NTSC after Feb 18, 2009. This is called the digital TV transition (dtv transition). It has many different formats that are able to be converted depending on which TV you buy. It can have 720, 768, or 1080 lines of resolution (and more coming). What's more, new TVs are able to use different refresh rates of 72 Hz or 120 Hz, but it is still rooted in a system of 60 Hz.
What happens when you have PAL (say a DVD) and try to play it on NTSC or vice versa? You get error codes. The TV or DVD player says.."I don't understand it's at 50 hz and should be at 60 Hz" (or vice versa) and it can't make changes in the frame rates (50 frames per second or 60 frames per second). Unless you have a player with a processor that can read and adapt it.
to find out more or find out which country is which standard see the resource below
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