what's the difference between PAL(Europe) n' NTSC(America)? why were they invented???

Answer 1

NTSC is the U.S. standard that was adopted in 1941 as the first standardized television broadcasting and video format that is still in use. NTSC stands for National Television Standards Committee and was approved by the FCC (Federal Communications Commission) as the standard for television broadcasting in the U.S.

NTSC is based on a 525-line, 60 fields/30 frames-per-second at 60Hz system for transmission and display of video images. This is an interlaced system in which each frame is scanned in two fields of 262 lines, which is then combined to display a frame of video with 525 scan lines.

This system works fine, but one drawback is that color TV broadcasting and display was not part of the equation when the system was first approved. A dilemma arose as to how to incorporate Color with NTSC without making the millions of B/W televisions in use by the early 1950's obsolete. Finally, a standardization for adding Color to the NTSC system was adopted in 1953. However, the implementation of color into the NTSC format has been a weakness of the system, thus the term for NTSC became known by many professionals as "Never Twice The Same Color". Ever notice that color quality and consistency varies quite a bit between stations?

NTSC is the official analog video standard in the U.S., Canada, Mexico, some parts of Central and South America, Japan, Taiwan, and Korea.

PAL is the dominant format in the World for analog television broadcasting and video display (sorry U.S.) and is based on a 625 line, 50 field/25 frames a second, 50HZ system. The signal is interlaced, like NTSC into two fields, composed of 312 lines each. Several distinguishing features are one: a better overall picture than NTSC because of the increased amount of scan lines. Two: since color was part of the standard from the beginning, color consistency between stations and TVs are much better. There is a down side to PAL however, since there are fewer frames (25) displayed per second, sometimes you can notice a slight flicker in the image, much like the flicker seen on projected film.

Since PAL and its variations have such world domination, it has been nicknamed "Peace At Last", by those in the video professions. Countries on the PAL system include the U.K., Germany, Spain, Portugal, Italy, China, India, most of Africa, and the Middle East.

PAL was developed by Walter Bruch at Telefunken in Germany, and the format was first introduced in 1967.

Answer 2

Two different ways of encoding video images... they just run at different speeds... the idea was to protect video industry so it was immposible to see an european movie in the states... When the Dvd came up they made the same with regions, so its not olny the seven different region but also the PAL NTSC stuff...
but we all know now that is just easy to decode dvds while the old videos where very complicated... anyway, just another trick to make you buy according to the price of your region