The current american standard of scanning lines for Tv is?

I have a broadcasting final exam. Can any one tell me the current american standard of scanning lines for Tv is?|||525 lines... but that is ONLY the standard for a couple more months... Hope they update the test then. Actually, you should argue with them and ask them if they want the NTSC or the ATSC answer.





;-)





%26gt;Stephen missed a few lines%26lt; Just keep telling yourself that! LOL!!





Quote "The standard called for 525 lines of picture information in each frame" from http://en.wikipedia.org/wiki/NTSC





Quote "NTSC has 525 horizontal scan lines (this is why NTSC is sometimes referred to as "NTSC-525" or simply "525-line"). However, about only 486 of these lines are visible on the screen, the rest are in the sync pulse, which is not visible. Each horizontal line is made up of 720 pixels. This gives NTSC a total screen resolution of 720 x 486. (NTSC DV uses a resolution of 720 x 480)" from http://people.csail.mit.edu/tbuehler/vid鈥?/a>





Quote "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. NTSC is the official analog video standard in the U.S., Canada, Mexico, some parts of Central and South America, Japan, Taiwan, and Korea." from http://hometheater.about.com/cs/televisi鈥?/a>





Quote "PAL is the dominant format in the World for analog television broadcasting and video display 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. Countries on the PAL system include the U.K., Germany, Spain, Portugal, Italy, China, India, most of Africa, and the Middle East. from http://hometheater.about.com/cs/televisi鈥?/a>





I guess maybe a web site in Portugal isn't the right place to try and get info on US TV huh dude? LOL!!