Cable services security system
First Claim
1. In a television broadcast system having a headend for generating a broadcast signal, the broadcast signal including a plurality of channels, each channel including a channel identification code, and for transmitting the broadcast signal to a plurality of subscribers, an apparatus for monitoring the subscribers comprising:
- an addressable switch for receiving the broadcast signal from the system headend; and
a channel identifier at a subscriber location, having an address code and being connected between a subscriber display device and the addressable switch for receiving the broadcast signal from the addressable switch and transmitting the broadcast signal to the display device and for combining the address code with the channel identification code of a channel selected for viewing and transmitting a combined code signal to the addressable switch.
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Accused Products
Abstract
A cable television services security system includes a two-way communication system for transmitting a broadcast signal from a headend to subscribers and subscriber viewing information from a channel identifier located within a subscriber'"'"'s home back to the headend. An addressable switch located outside of the subscriber'"'"'s home compares the channel being viewed by the subscriber with a subscriber privilege code. If the subscriber is not authorized to view the channel, the broadcast signal being transmitted to the subscriber is interrupted.
289 Citations
37 Claims
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1. In a television broadcast system having a headend for generating a broadcast signal, the broadcast signal including a plurality of channels, each channel including a channel identification code, and for transmitting the broadcast signal to a plurality of subscribers, an apparatus for monitoring the subscribers comprising:
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an addressable switch for receiving the broadcast signal from the system headend; and a channel identifier at a subscriber location, having an address code and being connected between a subscriber display device and the addressable switch for receiving the broadcast signal from the addressable switch and transmitting the broadcast signal to the display device and for combining the address code with the channel identification code of a channel selected for viewing and transmitting a combined code signal to the addressable switch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A headend apparatus for a television broadcast system, the system transmitting a broadcast signal to a plurality of subscribers, the apparatus comprising:
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a headend controller for storing subscriber information; an addressable switch communications transmitter connected to the headend controller for modulating the subscriber information for transmission at a predetermined first frequency band; a combiner connected to the addressable switch communications transmitter for generating the broadcast signal comprising a plurality of individual viewing channels, wherein each channel includes a channel identification code, and the modulated subscriber information; a transport system connected to the combiner for transmitting the composite signal to the plurality of subscribers and for transmitting a subscriber viewing pattern information signal to the headend apparatus at a frequency within a predetermined second frequency band; a diplex filter connected to the combiner for separating the broadcast signal transmitted to the plurality of subscribers and the subscriber viewing pattern information signal; and an addressable switch communications receiver connected to the diplex filter for demodulating the subscriber viewing pattern information signal and providing said demodulated signal to the headend controller.
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25. An addressable switch for a television broadcast system connected between a headend of the broadcast system and a channel identifier, the headend for generating and transmitting a broadcast signal to a plurality of subscribers, the broadcast signal including a plurality of channels, each channel including a channel identification code, and the channel identifier for detecting the channel identification code of a channel selected for viewing by a subscriber and combining the channel identification code with a subscriber address code, the addressable switch comprising:
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a first diplex filter for receiving the broadcast signal from the headend at a first predetermined frequency; a second diplex filter connected to the first diplex filter for transmitting the broadcast signal to a subscriber at the first predetermined frequency; and a switch connected between the first and second diplex filters for interrupting transmission of the broadcast signal from the first diplex filter to the second diplex filter. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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32. A channel identifier for a television broadcast system connected between a headend of the broadcast system and a subscriber viewing device, the headend for generating and transmitting a broadcast signal to a plurality of subscriber viewing devices, the broadcast signal including a plurality of channels, each channel including a channel identification code, the channel identifier comprising:
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a splitter-combiner-filter for receiving the broadcast signal and providing the broadcast signal to the viewing device, wherein a single channel is selected by the viewing device for viewing; an RF receiver connected to the viewing device for determining the channel identification code of the viewing device selected channel; an address generator for storing a predetermined subscriber address code; a data combiner connected to the RF receiver and the address generator for forming a combined code signal comprising the channel identification code of the viewing device selected channel and the subscriber address code; and a transmitter connected to the data combiner for transmitting the combined code signal to the headend. - View Dependent Claims (33)
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34. In a television broadcasting system having a headend for delivering a broadcast signal to a plurality of subscribers, the broadcast signal comprising a plurality of channels, a method of monitoring subscriber viewing patterns comprising the steps of:
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attaching a channel identifier to each channel of the plurality of channels at the headend; forming a broadcast signal by combining the plurality of channels and their respective channel identifiers; transmitting the broadcast signal to the plurality of subscribers by way of a transport system; determining which channel a particular subscriber has selected for viewing by detecting the channel identifier of the selected channel with a channel identifier device connected to the subscriber'"'"'s viewing device; combining within the channel identifier the selected channel identification code with a subscriber address code to form a combined code signal; and transmitting the combined code signal over the transport system. - View Dependent Claims (35, 36, 37)
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Specification