Inband coding of secondary data
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United States of America Patent
Stats
-
Mar 17, 1987
Grant Date -
N/A
app pub date -
Dec 24, 1984
filing date -
Dec 24, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a system for communicating primary and secondary data from a transmitter to a receiver, each of a first plurality of primary data word values is communicated by the transmitter by transmitting an individual channel symbol associated with that value, while each of at least two other primary data word values are communicated by transmitting a selected one of at least two other channel symbols associated with that primary data word value. A predetermined one of the two channel symbols associated with the first primary data word value is transmitted only when secondary data having a first value is to be communicated, and a predetermined one of the two channel symbols associated with the second primary data word value is transmitted only when secondary data having a second value is to be communicated. In the receiver, both the primary and secondary data word values are recovered from the channel symbols thus transmitted.
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