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Multi-color video display systems using more than one signal source

  • US 4,149,184 A
  • Filed: 12/02/1977
  • Issued: 04/10/1979
  • Est. Priority Date: 12/02/1977
  • Status: Expired due to Term
First Claim
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1. Apparatus for selectively combining signals representative of two electrically independent image sources to provide a combined signal suitable for controlling a display, comprising:

  • means responsive to the signals for generating separate sequential bit coded representations thereof,means responsive to the data values contained in at least one of the sequential representations for generating sequential digital control signals for dynamically controlling the logical combination of individual bit coded representations in the sequences; and

    digital mixing means responsive to the control signals and to the bit coded representations for combining the representations in accordance with the function defined by the control signals.

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