Closed captions are actual representation of dialogues in the text
format so that it can be easily read by the viewers. Closed captions are
mandatory for any broadcast in United States and every television has a built
in decoder to decode the signal and display captions. Closed captions services finds its use not only for person who cannot hear but for also the
people whose language is not English or even a crowded place where noise is too
much like bar, airports or a place where noise is not allowed like hospitals.
Closed captioning services also enable user to choose the font colour and size of
the text according to their choice though the government has mandated that
captions be in white colour on black screen. Unlike open captioning that cannot
be turned off closed captioning service has the option to turn on or off
the captions as and when required by person.
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