Cable television system data verification apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 16, 1987
Grant Date -
N/A
app pub date -
May 31, 1984
filing date -
May 31, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a cable television system in which the individual subscriber's converter/tuner is located outside the subscriber's premises in an external control unit ('ECU') and controlled remotely via a subscriber processing unit ('SPU') connected to the ECU by a drop cable, data transmitted from the SPU to the ECU (e.g., channel selection data) is verified by transmitting similar echo back data from the ECU to the SPU. The SPU compares the original and echo back data to assure that the ECU correctly received the original data.
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Family
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- [Patents Count]
Cited Art Landscape
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