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Aha, I see you are from Italy. Let me explain the importance of CC in some countries. Well, for USA it is a requirement for all TV's to show these kind of captions. It's primary use is for the hearing impaired people, however it is also quite popular for those who want to read another language (for example reading english and hearing it also). It is sent on TV programs, you can also record into mpg. This is put on DVD for some reason too; it's cheaper to keep it the way it is, if the source already had CC, and to prevent importing of DVD, because CC is not decodable in Europe.
I want it because I have no other way to create this signal.
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