Pay television system
First Claim
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1. A pay televison system comprising:
- a means for tr ansmitting and receiving a charge code corresponding to the content of a program transmitted in a unidirectional television system, said charge code being in the form of digital coded signals which are transmitted a plurality of times throughout an entire period of each broardcast program at specified time intervals and a content of said charge code being changed at predetermined time intervals;
a means for accounting an amount in an accounting circuit within a receiver according to the number of changes of said received charge code;
a means for writing charge data proportional to this amount into a memory; and
a means for reading out charge data stored in said m®
mory when necessary and for displaying said stored charge data on a display means.
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Abstract
This invention, relating to a unidirectional television system such as satellite television broadcasting system, is intended to transmit and receive the charging information corresponding to the content of the program being transmitted in the digital form at certain time intervals, and account the amount by a charging amount accounting means built in the receiver from said information and the time of receiving the television program, write the charge data proportional to the amount in a memory, read out the charge data in the memory when necessary, and display it on a display means.
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Citations
13 Claims
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1. A pay televison system comprising:
- a means for tr ansmitting and receiving a charge code corresponding to the content of a program transmitted in a unidirectional television system, said charge code being in the form of digital coded signals which are transmitted a plurality of times throughout an entire period of each broardcast program at specified time intervals and a content of said charge code being changed at predetermined time intervals;
a means for accounting an amount in an accounting circuit within a receiver according to the number of changes of said received charge code;
a means for writing charge data proportional to this amount into a memory; and
a means for reading out charge data stored in said m®
mory when necessary and for displaying said stored charge data on a display means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13)
- a means for tr ansmitting and receiving a charge code corresponding to the content of a program transmitted in a unidirectional television system, said charge code being in the form of digital coded signals which are transmitted a plurality of times throughout an entire period of each broardcast program at specified time intervals and a content of said charge code being changed at predetermined time intervals;
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8. A pay television system as set forth incalim 5, further comprsiing:
- a means for comparing said received data and the content stored in said second memory;
a means for storing the differene between said recevied data and said content of said second memory in said second memory when the former content of said second memory is greater than the latter content thereof and for providing a flag signal when said differnece is stored in said second memory, and a means for adding the content of said first memory as a negative number to the control of said second memory when transferring the content of said first memory into said second memory during a certain period of said flag signal and storing the result in said second memory.
- a means for comparing said received data and the content stored in said second memory;
Specification