2.  It was the first standard for color TV and it started in the US in 1953  It is used by many countries on the American and Asian continents  It runs on 525 lines/frame  Requires a 60hz power grid

3.  Stared in Europe in the 1960’s  Has a wider channel bandwidth than the NTSC standard  Runs on 625lines/frame  Requires a 50hz power grid

4.  Used mainly by France and was introduced around the same time as the PAL standard  Similar to PAL but transmits color sequentially  Most countries that use this format also use PAL

6. http://www.world-import.com