WHAT IS THE DIFFERENCE BETWEEN NTSC AND PAL ?

ANSWER :-

Most countries in North and South America, including the US and Canada, utilize the National Television Standards Committee (NTSC) format, while Europe, Australia and parts of Asia use a competing format called Phase Alternating Line (PAL). The major distinction between these two formats is the rate at which a broadcast is displayed on a TV screen: NTSC displays at 30 frames per second (fps), while PAL provides 25 fps. Each format also uses a different number of lines on an old analog TV display when showing the signal, creating two different resolutions. The widespread adoption of High-Definition Televisions (HDTVs) by many consumers has not eliminated this difference, however, since older broadcasting methods have influenced digital signal playback.


Primary Difference

The differences between these formats really start with the electrical power system behind the transmissions viewed on a TV. In the US and countries like Canada and Mexico, electrical power is generated at 60 hertz, so for technical reasons the NTSC signal is also sent out at 60 "fields" per second. The first field accounts for all of the odd-numbered lines on a screen, while the second one includes the even-numbered lines. Since most analog televisions use an interlaced system, this means that 30 fields of one type are sent out, along with 30 fields of the other type each second.