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Signal processing apparatus and methods

  • US 4,704,725 A
  • Filed: 02/14/1986
  • Issued: 11/03/1987
  • Est. Priority Date: 11/03/1981
  • Status: Expired due to Term
First Claim
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1. A method of communicating data to a multiplicity of receiver stations, each of which includes a computer adapted to generate and transmit user specific signals to one or more associated output devices, with at least some of said computers being programmed to process modification control signals so as to modify the user specific signals transmitted to their associated output devices, each of said computers being programmed to accommodate a special user application, comprising the steps of:

  • transmitting an instruct-to-process signal to said computers to cause each of said computers to process data in accordance with its associated special user application,transmitting an instruct-to-output signal to said computers at a time when the corresponding user specific information is not being transmitted to an output device,detecting the presence of said instruct-to-output signal at selected receiver stations and coupling said instruct-to-output signal to the computers associated with said selected stations, andcausing said last named computers simultaneously to output their user specific signals to their associated output devices in response to said instruct-to-output signal, thereby to transmit to the selected output devices an output signal comprising said data and said related user specific signals, the output signals at a multiplicity of said output devices being different, with each output signal specific to a specific user.

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