×

Video modem for transmitting video data over ordinary telephone wires

  • US 5,786,844 A
  • Filed: 12/30/1996
  • Issued: 07/28/1998
  • Est. Priority Date: 12/01/1994
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for transmitting moving video information over a single pair of unshielded twisted pair (UTP) wires, comprising the steps of:

  • (1) frequency modulating a first carrier signal in accordance with a first composite video signal having a luminance component and a color subcarrier and producing thereby a first FM signal comprising a first upper sideband and a first lower sideband each including said color subcarrier of said first composite video signal;

    (2) filtering said first FM signal with a first band pass filter to suppress one of said first sidebands and to pass the other of said first sidebands, and producing thereby a first filtered signal having a frequency bandwidth less than a frequency bandwidth of said first FM signal; and

    (3) from a first physical location, injecting said first filtered signal into said single pair of UTP wires.

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