Chargeable program receiving limit setting system in two-way cable television system
First Claim
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1. In a cable television system having a two-way data communication, a chargeable program receiving limit setting system, comprising:
- a plurality of terminal units assigned to a plurality of respective subscribers; and
a central facility including a subscriber file for storing respective credit limits which represent predetermined numbers chargeable programs which may be received by respective ones of said subscribers, and a central processing unit for transmitting said respective credit limits in a command format to said terminal units;
wherein each of said terminal units includes an event register for storing a history of chargeable programs having been received, each said event register including a plurality of locations each for storing an indication of a program having been received, a limit memory for storing a respective one of said respective credit limits transmitted from said central facility, and a controller for changing a logical range of use of the locations of said event register according to said credit limit stored in said limit memory; and
wherein different chargeable program receiving limits can be provided by said central facility to respective ones of said subscribers.
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Abstract
A CATV television system in which a subscriber can only charge a maximum number of events before the central facility polls the subscriber'"'"'s terminal unit for charged events. The subscriber'"'"'s terminal contains a credit limit register which contains the maximum number of chargeable events. The central facility can change the individual subscriber'"'"'s credit limit register, dependent on credit worthiness, by a command sent over the CATV lines.
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5 Claims
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1. In a cable television system having a two-way data communication, a chargeable program receiving limit setting system, comprising:
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a plurality of terminal units assigned to a plurality of respective subscribers; and a central facility including a subscriber file for storing respective credit limits which represent predetermined numbers chargeable programs which may be received by respective ones of said subscribers, and a central processing unit for transmitting said respective credit limits in a command format to said terminal units; wherein each of said terminal units includes an event register for storing a history of chargeable programs having been received, each said event register including a plurality of locations each for storing an indication of a program having been received, a limit memory for storing a respective one of said respective credit limits transmitted from said central facility, and a controller for changing a logical range of use of the locations of said event register according to said credit limit stored in said limit memory; and wherein different chargeable program receiving limits can be provided by said central facility to respective ones of said subscribers. - View Dependent Claims (2, 3, 4, 5)
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Specification