WEBVTT - How do V-chips work?

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<v Speaker 1>Welcome to brain Stuff from how Stuff works dot com

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<v Speaker 1>where smart Happens. I am Marshall Brain with today's question,

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<v Speaker 1>what does a V chip really do and how does

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<v Speaker 1>it work? As of all new television sets sold in

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<v Speaker 1>the United States have to contain a V chip. The

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<v Speaker 1>V stands for viewer control and the goal of the

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<v Speaker 1>chip is to allow parents to choose the level of

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<v Speaker 1>TV programming that will be allowed into the home. The

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<v Speaker 1>idea behind a V chip is simple. TV shows have

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<v Speaker 1>a signal embedded into them that gives the show a rating,

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<v Speaker 1>and the chip can detect these ratings. The ratings that

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<v Speaker 1>the FCC has settled on look like this. T v

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<v Speaker 1>Y is for all children. All children can watch because

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<v Speaker 1>it has zero violence and zero sexual content. TV Y

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<v Speaker 1>seven for all children seven and over. Tv G is

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<v Speaker 1>for general audiences. There's no sex, violence, or inappropriate language.

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<v Speaker 1>Tv PG is parental guidance suggested TV fourteen is suitable

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<v Speaker 1>only for people over fourteen, there's some sex and violence,

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<v Speaker 1>and then t V M A is suitable only for

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<v Speaker 1>mature audiences and it can contain just about anything. A

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<v Speaker 1>parent can program the TV with a rating, and the

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<v Speaker 1>TV will block all shows above that rating. So if

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<v Speaker 1>apparent programs in the TV Y seven rating, the TV

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<v Speaker 1>will allow only shows rated at t V y or

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<v Speaker 1>t V Y seven, but it will block all other shows.

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<v Speaker 1>How does your TV see the rating of a show?

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<v Speaker 1>The ratings are encoded in what's called the line twenty

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<v Speaker 1>one data area. All sorts of things go inside this

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<v Speaker 1>data area, such as closed captioning information and the time

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<v Speaker 1>of day, as well as the ratings information. It's basically

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<v Speaker 1>hidden in a part of the TV signal that doesn't

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<v Speaker 1>show up on the screen. The V chip simply decodes

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<v Speaker 1>the line twenty one data, compares it with the parents

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<v Speaker 1>allowed rating that they've programmed into the chip, and then

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<v Speaker 1>either blocks the signal or lets it through. For more

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<v Speaker 1>on this and thousands of other topics, does it How

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