×

IR Remote control system

  • US 4,425,647 A
  • Filed: 05/17/1982
  • Issued: 01/10/1984
  • Est. Priority Date: 07/12/1979
  • Status: Expired due to Term
First Claim
Patent Images

1. A system for remotely controlling the operation of one or more consumer electronic apparatus comprising:

  • a transmitter comprising;

    means for selecting a function of one of said apparatus to be controlled;

    encoding means developing a single word multibit code defining said selected function, each of the data bits of said single word multibit code being represented by a first information signal representing the logic state of the data bit and an associated second information signal representing the complementary logic state of the data bit, said first and second information signals comprising a single pulse representing a first logic state or a grouping of at least two relatively closely spaced pulses representing a second logic state; and

    means for successively transmitting each of said first information signals followed immediately by the transmission of its associated second information signal such that each transmitted data bit comprises the same number of pulses, said transmission being effected over a single relatively noisy data transmission path; and

    a remotely located receiver comprising;

    means for receiving said information signals transmitted over said single relatively noisy data transmission path;

    means for testing the parity of the logic states represented by the first and second received information signals representing each of said data bits; and

    means responsive to said parity testing means for controlling the selected function defined by said received information signals.

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