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Hybrid analog/digital STB

  • US 5,638,112 A
  • Filed: 08/07/1995
  • Issued: 06/10/1997
  • Est. Priority Date: 08/07/1995
  • Status: Expired due to Term
First Claim
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1. Apparatus for processing analog and digital television signals received over respective television channels, comprising:

  • a tuner (14) selectively operable for tuning said television channels;

    an analog processing path (24-28) coupled to the output of said tuner (14) and responsive to a tuned analog television signal for providing a demodulated baseband analog television signal including a first analog composite video signal and a first analog composite audio signal;

    a digital processing path (32-36,

         40) coupled to the output of said tuner (14) and responsive to a tuned digital television signal for providing a demodulated digital television signal including a first digital component video signal and a first digital component audio signal;

    means (76,

         80) for converting the first digital component video signal to a corresponding second analog composite video signal; and

    first means (82) for linearly mixing said first and second analog composite video signals in selected proportions for providing an output analog composite video signal.

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