Apparatus for updating time-of-day information in a signal
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United States of America Patent
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Feb 12, 1991
Grant Date -
N/A
app pub date -
Aug 7, 1989
filing date -
Aug 17, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A continuous time-of-day or date correction of a signal produced by a clock module is obtained from the data in a video-text or teletext signal that contains accurate time-of-day and/or date reference information. When the video-text/teletext data contain such reference information, the data of the output signal of the clock module are compared, on a continuous basis, with the received video-text/teletext. In case of a deviation between the clock module data and the reference information, a correction signal is applied to the clock module and corrects the clock module.
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