It is intended for hearing and hearing-impaired viewers with teletext decoders can receive teletext captions, or can call up pages of additional information. Teletext uses several lines of the broadcast signal, permitting the transmission of high-definition graphics and text. Teletext decoders came on the market in 1984. This latest development in captioning technology delivers captions to the largest possible audience of viewers. The Caption Center has been a leader in the development of teletext and dual-mode technology and programming since 1980.
Skilled stenographers transcribe words as they are spoken.
They are converted to caption data and instantaneously added to the broadcast signal. For selected programs, viewers can choose between captions in Spanish or English, or between captions edited for different levels of reading skill. Language-edited captions are designed to meet special reading needs by simplifying vocabulary and sentence structure.