A system for encoding, storing, and displaying captions includes a modem for transmitting a signal including one or more closed captions generated in real time, a videotape player for playing a videotape of a television program including both a video signal and a time code signal corresponding to a time...http://www.google.com.tw/patents/US5424785?utm_source=gb-gplus-share專利 US5424785 - System for encoding and displaying captions for television programs
