Method for processing teletext data transmitted in a television signal
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United States of America Patent
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-
Aug 5, 1997
Grant Date -
N/A
app pub date -
Jul 3, 1995
filing date -
Nov 24, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In order to increase decoding safety of the address frame of a teletext page during the reception of teletext data, and in particular of a page containing higher level supplementary data, without having to apply additional error control steps, the address frame for a teletext row is forecast from the decoded material, and if required, with a corrected address frame of the preceding teletext row. The forecast address frame is compared with the actually received address frame of the succeeding teletext row. If a deviation at two or more information units of a byte are detected during the comparison, and if required during decoding of the received address frame, the forecast address frame is used instead of the received address frame for addressing the data stream of the concerned teletext row.
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