Patents Assigned to Snell & Wilcox
  • Video storage
    Patent number: 5526057
    Abstract: A video storage arrangement produces a continuous video signal representing a test pattern. One luminance frame store is provided and two chrominance frame stores. A selection can be made between NTSC, PAL and SECAM modes. Switches are provided for selecting between chrominance frame stores and between inverting and non-inverting mode. Depending upon the selected broadcast standard, these switches are driven from field and line clock signals to generate the required output field sequence in YC or composite form.
    Type: Grant
    Filed: September 22, 1994
    Date of Patent: June 11, 1996
    Assignee: Snell & Wilcox Limited
    Inventor: Barry Flannaghan
  • Digital television standards conversion
    Patent number: 5255091
    Abstract: Film originating NTSC video signals are converted to the PAL standard by a process which detects and eliminates duplicate fields. Video frames corresponding one-for-one with the original film frames are line interpolated to provide a PAL signal with minimal artefacts. Edits are detected and steps taken to avoid interpolations across a cut.
    Type: Grant
    Filed: August 19, 1991
    Date of Patent: October 19, 1993
    Assignee: Snell & Wilcox Limited
    Inventors: David Lyon, Guy R. Caplin
  • Video signal processing and video stores
    Patent number: 5166792
    Abstract: Video signal processing apparatus, particularly for converting from one broadcast television standard to another, utilizes a plurality of field stores which are read cyclically. Information is written simultaneously into a number of field stores and accumulated over a number of input fields. Line interpolation is conducted before information is written to the field stores.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: November 24, 1992
    Assignee: Snell & Wilcox Limited
    Inventor: David Lyon