Display of closed captioning status

In a television system including closed caption circuitry for receiving and decoding closed caption data, a controller continually monitors the closed caption circuitry for an indication of the presence of any of a plurality of predetermined valid closed caption data codes. Every time any of the pre...

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Bibliographic Details
Main Authors JOSEPH WAYNE FORLER, MICHAEL DAVID LANDIS, PAUL DISHAUN HENRY
Format Patent
LanguageChinese
English
Published 11.03.1994
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:In a television system including closed caption circuitry for receiving and decoding closed caption data, a controller continually monitors the closed caption circuitry for an indication of the presence of any of a plurality of predetermined valid closed caption data codes. Every time any of the predetermined valid closed caption data codes is detected, a timer is reset to begin timing a predetermined time interval, and an on-screen display indicating that closed caption data are available is enabled. If a subsequent one of the predetermined valid closed caption data codes is not detected before the expiration of the time interval, then the on-screen display indicating that closed caption data are available is disabled. In another embodiment of the invention, a lamp is illuminated to indicate the availability of useful closed-caption data.
Bibliography:Application Number: TW199382101043