×

Device and method for transmitting an audio signal using a video signal line in a computer system

  • US 5,940,070 A
  • Filed: 05/13/1996
  • Issued: 08/17/1999
  • Est. Priority Date: 05/12/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A data transmission apparatus for transmitting an audio signal through a video signal cable, comprising:

  • a monitor including a sound speaker and a video display;

    a computer system comprising;

    audio generating means for generating an audio signal;

    video generating means for generating a video signal and synchronization signals,first audio buffer means for temporarily retaining the audio signal and outputting the audio signal during a blanking interval of the video signal in accordance with the synchronization signals; and

    multiplexer means for multiplexing the audio signal with the video signal by inserting the audio signal into the blanking interval of the video signal, and for generating a multiplexed signal;

    a video signal cable configuration comprising a plurality of leads connected between the computer system and the monitor, for transmitting the synchronization signals between the computer system and the monitor on at least one lead and separately transmitting on a different lead the multiplexed signal from the computer system to the monitor; and

    said monitor comprising;

    demultiplexer means connected to said video signal cable, for demultiplexing the multiplexed signal received from said video signal cable by separating the audio signal and the video signal from the multiplexed signal in accordance with a control signal, and for generating a separated audio signal and a separated video signal;

    second audio buffer means for temporarily retaining the separated audio signal and outputting the separated audio signal to said sound speaker for sound production in accordance with the control signal and the synchronization signals; and

    said video display connectable to receive the synchronization signals, said video display enabling a visual display of the separated video signal on a screen in accordance with the synchronization signals.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×