Patent
Interactive video method and apparatus
TLDR
In this paper, a method and apparatus for in-band, video broadcasting of commands to interactive devices is described, where control data are encoded by subliminally modulating, prior to the remote, composite video broadcast of video program material, a selected sequence of video image fields.Abstract:
Method and apparatus for in-band, video broadcasting of commands to interactive devices are described. Control data are encoded by subliminally modulating, prior to the remote, composite video broadcast of video program material, a selected sequence of video image fields. The resulting modulated video fields within the viewing area of a television, each having alternately, proportionately raised and lowered luminance horizontal scan lines, are monitored by a light sensitive device positioned adjacent the user's television screen. A semirigid, twisted pair cable connects the device to nearby receiver/transmitter electronics that discriminate the binary data from the program material and amplitude modulate a high frequency infrared (IR) carrier with the data. Interactive devices, e.g. educational aids or action toys, within range of the wireless IR transmission detect energy in this frequency range, decode the commands embedded in the control data, and selectively execute predetermined actions in response to the data-encoded broadcast. In a proposed modification, low radio frequency (RF) electromagnetic radiation emanating from the television's raster scan electronics is coupled by a conventional RF antenna to the receiver electronics, which identically discriminate the binary data, from the program material, for transmission to the interactive devices.read more
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References
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Patent
Method for providing targeted profile interactive CATV displays
TL;DR: In this paper, an improved method for interactively creating a selection profile for a subscriber and interactively selecting in real time one of a plurality of messages, such as television commercials or game scores, based upon the selection profile was proposed.
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TL;DR: In this paper, a method and apparatus for superimposing printed characters of any such nature as may be transmitted upon a received television image, at the will of the viewer at the receiver.
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Television/telephone system with automatic dialing
TL;DR: A television receiver incorporating telephone interface circuitry permitting the viewer to remotely place outgoing calls by recalling a selected number from memory is disclosed in this paper, where an infrared link is used for remotely answering incoming calls, initiating outgoing calls and programming a nonvolatile memory with a plurality of preferred telephone numbers for future use.
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Apparatus using a light sensing system for sensing time modulated information from a light emitting device
TL;DR: In this paper, a light pen was used to read bar codes in a broadcasting periodical and distinguish whether the light pen is reading the CRT or a bar code, and a differentiator and asymmetry detector were used to sense whether the output pulses have sharp or decaying trailing edges.