×

Audio signal section apparatus

  • US 4,903,129 A
  • Filed: 04/06/1989
  • Issued: 02/20/1990
  • Est. Priority Date: 04/06/1989
  • Status: Expired due to Term
First Claim
Patent Images

1. A baseband television signal switching system, comprising:

  • video switch means, having a plurality of video signal inputs for receiving respective baseband video signals, having first and second control inputs for receiving respective first and second switching control signals and having an output terminal for developing a video signal selected from said baseband video signals at said plurality of video inputs in response to said switching control signals;

    audio switch means, having a plurality of signal inputs for receiving respective baseband audio signals, having first and second control inputs for receiving said respective first and second control switching signals and having an output terminal for developing an audio signal selected from said baseband video signals at said plurality of audio inputs in response to said switching control signals;

    control means for generating said first and second switching control signals at first and second outputs respectively, and generating a third control signal at a third output in response to data signals input by a user; and

    additional control means coupled to said control means for substituting an alternate control signal for said first and second control signals at said control inputs of said audio switch means in response to said third control signal.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×