×

Buffer memory dispersion type video/audio transmission system with spatially and timewise divided inter-office junction lines

  • US 4,518,989 A
  • Filed: 09/30/1982
  • Issued: 05/21/1985
  • Est. Priority Date: 11/24/1978
  • Status: Expired due to Fees
First Claim
Patent Images

1. A buffer memory dispersion type video/audio transmission system with spatially and timewise divided interoffice junction lines comprising:

  • a center comprising;

    a group of audio files for storing audio information;

    a group of video files for storing video information;

    means for fetching specific information from said audio and video file groups in response to an information request received at said center from a subscriber terminal unit and for dividing fetched video information into a luminance signal and a chrominance signal; and

    means for transmitting said luminance signal with a superimposing signal in a time-divisional fashion by a first junction line and for transmitting said chrominance signal with an audio signal based on fetched audio information in a time-divisional fashion by a second junction line; and

    a plurality of subcenters comprising;

    a multiplex receiver for receiving said transmitted signals from said first and second junction lines;

    video and audio buffer memories for temporarily storing video and audio information received by said multiplex receiver from said first and second junction lines; and

    an audio output unit and a video output unit and an audio changeover unit and a video changeover unit for coupling said temporarily stored video and audio information to said subscriber terminal units.

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