
US Patent No: 5,412,720
Number of patents in Portfolio can not be more than 2000
Interactive home information system
Stats
-
May 2, 1995
Issued date -
May 1, 1992
filing date -
07/877,325
serial no -
In Force
status
Importance
Abstract
An interactive cable television system having a plurality of feeder servers, a plurality of home interface controllers and a feeder port. Home interface controllers are each equipped with a radio frequency input and a data communications link with a receiver and transmitter in the feeder port. A node control in communication with the feeder port determines whether a home interface controller is active and then assigns a feeder server to it. The feeder server provides one of a plurality of information signals from a headend depending on a selection input. Digitally compressed video signals are provided at the headend. The digitally compressed video signals can be provided by a modulator means at a carrier frequency greater than the upper frequency limit for carrying analog television signals with acceptable quality on the cable system. The cable television system may make use of a scrambler that maintains the chrome subcarrier on a sync-stripped output signal at all times including the period of vertical retrace. The sync-stripped output signal is modulated at a first carrier frequency and the sync-signal is modulated at a second carrier frequency. A corresponding decoder is provided for receiving scrambled signals and restoring the sync-signal to restore the television signal.
First Claim
Related Publications
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,245,245 Interactive CATV system | 199 | 1976 | |
| 4,454,538 Data communication in CATV system | 92 | 1982 | |
| 4,710,971 Channel selecting device for CATV terminal unit | 16 | 1985 | |
| 4,769,838 Community antenna television reception controlling apparatus | 41 | 1985 | |
| 5,008,934 CATV transmission system using scrambled signals | 16 | 1989 | |
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| 4,466,017 Sync suppression scrambling of television signals for subscription TV | 72 | 1981 | |
| 4,471,380 Scrambling and descrambling of television signals for subscription TV | 33 | 1982 | |
| 4,523,228 Sync suppression scrambling of television signals for subscription TV | 36 | 1983 | |
| 4,567,517 Descrambler for sync-suppressed TV signals | 17 | 1983 | |
| 4,922,532 Sync suppression scrambling and descrambling of television signals for subscription TV | 16 | 1988 | |
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| 4,264,924 Dedicated channel interactive cable television system | 265 | 1979 | |
| 4,573,072 Method for expanding interactive CATV displayable choices for a given channel capacity | 278 | 1984 | |
| 4,602,279 Method for providing targeted profile interactive CATV displays | 399 | 1984 | |
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| 4,533,948 CATV Communication system | 177 | 1982 | |
| 4,860,379 Data communications system | 189 | 1988 | |
| 5,231,494 Selection of compressed television signals from single channel allocation based on viewer characteristics | 255 | 1991 | |
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| 4,801,190 Two-way optical fiber transmission network | 20 | 1987 | |
| 5,027,400 Multimedia bidirectional broadcast system | 551 | 1989 | |
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| 4,941,040 Cable television system selectively distributing pre-recorded video and audio messages | 172 | 1988 | |
| 5,014,125 Television system for the interactive distribution of selectable video presentations | 458 | 1989 | |
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| 4,903,126 Method and apparatus for tv broadcasting | 36 | 1989 | |
| 4,975,771 Method and apparatus for TV broadcasting | 126 | 1989 | |
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| 4,829,372 Presentation player | 234 | 1987 | |
| 5,119,188 Digital audio-video presentation display system | 159 | 1990 | |
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| 4,918,516 Closed circuit television system having seamless interactive television programming and expandable user participation | 101 | 1987 | |
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| 5,132,992 Audio and video transmission and receiving system | 520 | 1991 | |
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| 5,093,718 Interactive home information system | 358 | 1990 | |
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| 4,847,700 Interactive television system for providing full motion synched compatible audio/visual displays from transmitted television signals | 194 | 1987 | |
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| 4,748,689 Fiber-optic distribution system for broadband signals | 54 | 1986 | |
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| 4,769,833 Wideband switching system | 108 | 1986 | |
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| 4,760,442 Wideband digital signal distribution system | 69 | 1985 | |
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| 4,709,418 Wideband cable network | 197 | 1983 | |
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| 5,133,079 Method and apparatus for distribution of movies | 359 | 1990 | |
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| 4,538,174 Two-way subscriber TV system with multiple subscriber's sets | 181 | 1983 | |
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| 4,616,263 Video subsystem for a hybrid videotex facility | 129 | 1985 | |
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| 4,290,142 Interactive cable television system | 155 | 1979 | |
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| 4,253,114 High security subscription television system employing real time control of subscriber's program reception | 85 | 1978 | |
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| 4,509,073 Two-way cable-television system | 103 | 1982 | |
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| 4,507,680 One way interactive multisubscriber communication system | 110 | 1982 | |
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| 4,247,106 System arrangement for distribution and use of video games | 161 | 1978 | |
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| 4,947,244 Video selection and distribution system | 141 | 1989 | |
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| 4,506,387 Programming-on-demand cable system and method | 352 | 1983 | |
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| 5,060,262 Video scrambling, audio masking and data transmission methods for wireless cable systems | 42 | 1990 | |
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| 4,912,760 Off-premises cable television channel interdiction method and apparatus | 59 | 1988 | |
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| 4,994,909 Video signal distribution system | 104 | 1989 | |
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| 5,109,414 Signal processing apparatus and methods | 286 | 1990 | |
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| 4,695,880 Electronic information dissemination system | 221 | 1985 | |
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| 4,827,253 Video compositing using a software linear keyer | 68 | 1988 | |
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| 4,821,102 Video display system with selective display of operating conditions | 134 | 1987 | |
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| 4,963,995 Audio/video transceiver apparatus including compression means | 282 | 1988 | |
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| 4,706,121 TV schedule system and process | 909 | 1986 | |
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| 4,367,557 Wired broadcasting systems | 167 | 1979 | |
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| 4,627,105 Signal transmission system and method | 23 | 1985 | |
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| 4,823,386 Addressable subscriber cable television system | 78 | 1987 | |
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| 4,633,462 Multiple access communication on a CATV reverse channel | 121 | 1983 | |
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| 5,057,917 Real-time data compression of broadcast video signals | 112 | 1990 | |
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| 4,491,983 Information distribution system | 165 | 1982 | |
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| 4,536,791 Addressable cable television control system with video format data transmission | 305 | 1984 | |
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| 4,891,694 Fiber optic cable television distribution system | 138 | 1988 | |
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| 4,591,906 Wireless transmission from the television set to the television station | 138 | 1985 | |
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| 5,130,792 Store and forward video system | 310 | 1990 | |
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| 4,995,078 Television broadcast system for selective transmission of viewer-chosen programs at viewer-requested times | 232 | 1989 | |
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| 4,450,477 Television information system | 194 | 1982 | |
| 4,901,367 Cable communications system with remote switching and processing converters | 60 | 1988 | |