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Transmitting a secondary signal with dynamic injection level control

  • US 5,559,559 A
  • Filed: 06/14/1993
  • Issued: 09/24/1996
  • Est. Priority Date: 06/14/1991
  • Status: Expired due to Fees
First Claim
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1. A processor for combining a primary color video signal having a luminance and a chrominance portion with the chrominance portion being in an upper portion of a bandwidth of the video signal with a color carrier in the upper portion and a power level with a secondary signal having a bandwidth greater than 100 KHZ for subsequent transmission, the processor comprising:

  • a primary signal section providing the primary video signal after attenuating a portion of the primary video signal within the band and above the color carrier;

    a secondary signal section providing a rasterized version of the secondary signal for injection into the primary video signal; and

    a dynamically controlled level injector for injecting the rasterized secondary signal into the attenuated portion of the primary video signal at different injection levels into the primary video signal.

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