Patents Examined by R. H. Johnson
  • Patent number: 4680797
    Abstract: A novel form of waveform coding is used, designated a "Critical Point Coder" (CPC). It operates by transmitting only those points in a waveform which are significant for defining its overall structure. The receiver reconstructs the missing points in the waveform using some sort of approximating interpolation. The Critical Point Coder uses a new approach to waveform coding. Rather than transmitting information about each sample as other waveform coders, the Critical Point Coder transmits information for only samples deemed critical to high quality reconstruction. The four major functions performed by the Critical Point Coder are (1) detecting which samples are critical, called critical points e.g.
    Type: Grant
    Filed: June 26, 1984
    Date of Patent: July 14, 1987
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: George Benke