Device for calculating a charge for a charged information signal with errors avoided in a report of the charge
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United States of America Patent
Stats
-
Jan 3, 1989
Grant Date -
N/A
app pub date -
Aug 15, 1984
filing date -
Aug 19, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The amount of money which should be charged upon reception of a pay television signal or a like information signal, is calculated by a charging device comprising a calculator (25) for calculating the amount of charge and an encoder (28) for encoding the charge and time instant (date) using by a key code specific to the charging device to form a check code which should be reported together with the charge. The date data may be indicated either by a timepiece (26) or by a time signal multiplexed on the information signal. Cost information used in the calculator may be multiplexed on the information signal. Alternatively and preferably, the cost information is represented by a scrambling key used in providing the information signal.
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