
US Patent No: 5,206,722
Number of patents in Portfolio can not be more than 2000
Remote channel switching for video on demand service
Stats
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Apr 27, 1993
Issued date -
Dec 28, 1990
filing date -
07/635,044
serial no -
Expired
status
Importance
Abstract
VOD services are provided by providing at each subscriber location a switching apparatus (e.g., 23 of FIG. 2) which is remotely controlled from the head end (12) of the system. A set top box of each subscriber is provided with a single channel designation (X) for VOD reception. In response to a request from a subscriber for a particular TV program at a specified time, the provider at the head end actuates the switching apparatus (23) to permit the set top box to be tuned to a specified channel that corresponds to a channel upon which the requested VOD program will be transmitted. Then, when the subscriber selects on his set top box the single VOD channel designation (X), the set top box is capable of receiving the requested TV program on the specific TV channel of the transmission line (11) that has been designated for it by the provider at the head end.
First Claim
Related Publications
International Classification(s)
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- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,995,075 Apparatus and method for encoding telephone ringing signals | 54 | 1989 | |
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| 4,947,244 Video selection and distribution system | 141 | 1989 | |
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| 4,554,584 Video and audio blanking system | 138 | 1983 | |
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| 4,823,386 Addressable subscriber cable television system | 78 | 1987 | |
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| 4,446,458 Monitoring and control system | 50 | 1981 | |