US 4,430,669 AGranted

Transmitting and receiving apparatus for permitting the transmission and reception of multi-tier subscription programs

AssigneePayview Limited

InventorWilliam S. H. Cheung

Life of this patent

Estimating the term…

Loading patent…

Abstract

During non-program hours, a subscription broadcast television station broadcasts in place of programming the time of a future special broadcast as well as other information to enable decoding circuitry of subscribers. The receiver at the subscriber's residence tunes during non-broadcast hours all subscription television broadcast frequencies, and compares the subscriber's identification number with information being broadcast. When a coincidence between the received identification number being broadcast, and a stored identification number is obtained, the time of the future special broadcast is stored in a memory. At the time of a subscription broadcast identified in the memory, tuning data is recalled from a memory for tuning the receiver to receive the special broadcast. The subscriber's decoding apparatus is also activated permitting descrambling of the special program broadcast.

Claims12

Dependent claims

A multichannel receiver for selectively tuning one of several pay television stations during programming hours which broadcast scrambled video signals, each of said stations broadcasting during non-programming hours related subscriber identification information and program identification information, comprising:

a voltage controlled tuner for tuning the frequency of each of said stations in response to an operating voltage;
a read only memory for storing tuning information identifying the frequency of each of said stations and a subscriber identification number;
a Random Access Memory for storing received program identification information;
a system clock for providing periodic timing pulses;
video processing circuitry for removing and separating said video signals and information signals from a broadcast signal received by said tuner;
a control processor having I/O parts connected to said memories, and video processing circuitry, said processor being connected to said clock, and during non-programming hours said processor being connected to continually and sequentially read out of said Read Only Memory tuning information for each of said television stations, said processor further comparing subscriber identification information provided by said video circuitry to subscriber identification data in said Read Only Memory each time a station frequency is tuned and upon coincidence thereof stores said related program identification information including status identification data and program time in said RAM at a specified address;
means for addressing and reading out from said Random Access Memory said stored information during program broadcast time;
and
means for tuning the television receiver tuner in response to said read out information whereby said television receives a station signal identified by said stored information at a frequency and time.

6 more elements

A receiver for receiving subscription program broadcasts from a plurality of broadcast stations operating at different frequencies, each of said stations broadcasting at a specified time in advance of said program data identifying subscribers, said stations, and the time of broadcast of programs subscribed to by each subscriber comprising:

a voltage controlled tuner for selectively tuning each of said broadcast stations' signals;
a station and subscriber identification number memory, said memory having programmed therein tuning frequency data for each of said stations and a subscriber identification number;
a system clock for providing an indication of said specified time;
a processor means connected to said system clock and said memory, said processor sequentially reading out of said memory said tuning frequency data during said specified times;
means for sequentially converting each of said tuning frequency data into a voltage for tuning said tuner whereby each of said station broadcast signals are sequentially tuned during said specified time;
video processing circuitry connected to said tuner for removing data identifying subscribers and subscribed program information transmitted with each broadcast station signal which is tuned;
means for comparing data removed by said video circuitry with said stored identification numbers;
means for storing at a distinct address data from said video circuitry indicating the time of a subscribed program and the station identity broadcasting said program in response to an indication from said means for comparing:
whereby data from each of said broadcast stations is stored at a different address upon an indication from said means for comparing that said subscriber is authorized to receive programs identified by said data;
means for reading out of said means for storing identifying data of the stored broadcast station identity at a broadcast time specified by said data in said means for storing;
and
means for generating a tuning voltage for tuning said tuner to the frequency of said broadcast station identified by said read out data at a time read out from said memory, whereby said tuner produces a scrambled video signal transmitted by said broadcast station.

9 more elements

Dependencies are inferred from the claim text.