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Patent

Video transmission and control system utilizing internal telephone lines

David D. Goodman, +1 more
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TLDR
In this paper, a video transmission system for facilitating transmission of video and control signals between different locations in a residence using existing telephone wiring is presented. But it does not address the problem of interference with telephone communications.
Abstract: 
A video transmission system for facilitating transmission of video and control signals, particularly infrared remote control signals, between different locations in a residence using existing telephone wiring. Simultaneous transmission of signals of both types over active telephone lines is possible without interference with telephone communications. Transmission succeeds without requiring special treatement of the video signals beyond RF conversion, despite signal attenuation inherent in transmission over the telephone line media. Two or more video sources may be tied into the system, and selected as desired. Remote control signals generated in one room may be utilized without requiring a clear line of sight between the remote control device and the receiver.

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TL;DR: In this article, asymmetrical digital subscriber line interface units over a local loop were proposed to provide digital transmission connectivity between the central office and the subscriber for conventional telephone instrument connectivity in a public switched telephone network (PSTN).
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TL;DR: In this paper, the authors present a system and method in a building or vehicle for an actuator operation in response to a sensor according to a control logic, the system comprising a router or a gateway communicating with a device associated with the sensor, and an external Internet-connected control server associated with control logic implementing a PID closed linear control loop and communicating with the router over external network for controlling the in-building or in-vehicle phenomenon.
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Patent

Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels

Eric Paneth, +3 more
TL;DR: In this article, a system and method for wireless communication between a plurality of subscriber units and a base station, the base station communicating information signals from an originating source to a destination subscriber unit over a channel at an assigned one of a plurality OF frequencies using repetitive time frames, each said time frame comprising a sequence of time slots.
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Ensemble modem structure for imperfect transmission media

Dirk Hughes-Hartogs
TL;DR: In this paper, a high speed modem that transmits and receives digital data on an ensemble of carrier frequencies spanning the usable band of a dial-up telephone line is described, which includes a system for variably allocating data and power among the carriers to compensate for equivalent noise and to maximize the data rate.
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Pstn architecture for video-on-demand services.

Larry A Litteral, +6 more
TL;DR: In this article, asymmetrical digital subscriber line interface units over a local loop were proposed to provide digital transmission connectivity between the central office and the subscriber for conventional telephone instrument connectivity in a public switched telephone network (PSTN).
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Video communications system having a remotely controlled central source of video and audio data

Jason M. Cohen
TL;DR: In this article, a video communications system is provided that makes it possible for home viewers to download a movie in digital format from a large archive library, store the digital movie file locally, and view the movie at any convenient time.
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Simultaneous transmission of two information signals within a band-limited communications channel

Donald W. Moses, +2 more
TL;DR: In this article, a co-channel communications system is disclosed which permits a digital data signal to be simultaneously transmitted with a communications medium signal such as telephone voice or television video, where the data signal or signals are converted into very low multifrequency signals consisting of fundamental frequencies and harmonics which span the communications bandwidth.