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The mechanism used for Line 21 Closed Captions allows the viewer to choose between a maximum of four different "channels" of simultaneous captions, plus four more "channels" of non-program related text. In the years since the introduction of this system, it was discovered that channels CC1, CC2, and T1 (the first and second closed-caption channels and the first text channel) were the only ones broadcasters ever used, so alternate uses were found for two of the remaining channels. Channel T2 is now used to transmit Interactive TV (ITV) signals, which is used by MSN-TV to transmit the internet links for their service. Channel CC3 is now used to transmit the eXtended Data Service (XDS). XDS contains a wide variety of information, but the two portions most commonly used are the time of day signal which newer VCR's use to program their clocks, and the rating signal which is used to control what content children are allowed to watch via the "V-Chip"s in newer TV's.
Line 21 Closed Captions are transmitted on the last odd and even lines in the Vertical Broadcast Interval (VBI), the non-visible part of the TV signal used mostly for calibration purposes. If you adjust the vertical hold on a North American television set, you should be able to see one or two lines above the normal "top" of the screen, each made up of sixteen rapidly-blinking segments. These are Fields 1 and 2 of Scanline 21. Each segment of each line is used as a bit to build up a total of four eight-bit bytes, two bytes in the odd field and two bytes in the even field. Field 1 is used to transmit channels CC1, CC2, T1 and T2 (ITV), while Field 2 is used to transmit channels CC3 (XDS), CC4, T3 and T4.
Hmmm...
Originally posted by greeneyedleo
Can you take some photos of this?
On DirectTV, I watch Fox every day *GASP* and I dont have this problem. Sometimes I wish it would block out Obama
Originally posted by ZombieOctopus
Consider yourself lucky! If Fox went off the air, the combined IQ of America would increase by about 10 points.
Originally posted by prophecywatcher
I have a picture, but I'm not sure how to upload onto thread. Do I have to use html? Please tell me there is another way!
Originally posted by greeneyedleo
Sometimes I wish it would block out Obama
Originally posted by prophecywatcher
I have a picture, but I'm not sure how to upload onto thread. Do I have to use html? Please tell me there is another way!
Originally posted by ZombieOctopus
Consider yourself lucky! If Fox went off the air, the combined IQ of America would increase by about 10 points.
Originally posted by ElectricUniverse
Originally posted by ZombieOctopus
Consider yourself lucky! If Fox went off the air, the combined IQ of America would increase by about 10 points.
You do know your statement is nothing more than political baiting right?...
Anyway, you want an awnser?...
I am sure you should have said American's IQ's will "decrease" if the only news sources they can watch are CNN, and the other Socialist channels...
I know a lot of Canadians love Castro's News Network, aka CNN and are so brainwashed, as many Americans who are fans of castro and other Socialist dictators, but Fox News has often given information that no other news source has given.
But hey, if you love to suppress certain channels, it does shows what Socialism does to a nation, and it's people...
Originally posted by Alaskan Man
just imagine if this happened to all the news networks, on everyone's television set.
it would probably create a country where people actually think for themselves.
i wonder what that would be like utopia?
Originally posted by whoshotJR
Just so you know I don't think Castro would approve of CNN much either.
"We put our focus from the very beginning on national and international news," he said. "That really wasn't available from CBS, NBC and ABC, because they were too busy covering the trivia."
In 1985, the network launched CNN International, an idea Turner said he got three years before when he met Cuban President Fidel Castro.
"He said, 'Ted, the whole world needs CNN. I use it all the time and it's very important to me.' So I said, 'Well, if Castro needs it, certainly the capitalists around the world could use it, and perhaps some other communists too.' "
Originally posted by ElectricUniverse
Why do you think a Socialist/Communist dictator would approve of CNN and want it to go international?