Patents by Inventor David N. Ault

David N. Ault has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Accuracy improvement in CORDIC through precomputation of the error bias
    Patent number: 8239430
    Abstract: Performing a calculation using a coordinate rotation digital computer (CORDIC) algorithm. Execution of the CORDIC algorithm is begun. An error introduced by a truncated vector as a result of executing the CORDIC algorithm is pre-computed. The error is incorporated into a subsequent iteration of the CORDIC algorithm. Execution of the CORDIC algorithm is completed. The result of the CORDIC algorithm is stored.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: August 7, 2012
    Assignee: International Business Machines Corporation
    Inventors: David N. Ault, Emiliano Lozano, Bao G. Truong, Samuel I. Ward
  • ACCURACY IMPROVEMENT IN CORDIC THROUGH PRECOMPUTATION OF THE ERROR BIAS
    Publication number: 20090094307
    Abstract: Performing a calculation using a coordinate rotation digital computer (CORDIC) algorithm. Execution of the CORDIC algorithm is begun. An error introduced by a truncated vector as a result of executing the CORDIC algorithm is pre-computed. The error is incorporated into a subsequent iteration of the CORDIC algorithm. Execution of the CORDIC algorithm is completed. The result of the CORDIC algorithm is stored.
    Type: Application
    Filed: October 9, 2007
    Publication date: April 9, 2009
    Inventors: David N. Ault, Emiliano Lozano, Bao G. Truong, Samuel I. Ward
  • Generating partials for perspective corrected texture coordinates in a four pixel texture pipeline
    Patent number: 6906723
    Abstract: A method, program and apparatus for generating partial differential equations for perspective corrected texture coordinates in a computer graphics display are provided. The present invention comprises calculating texture coordinates for four adjacent pixels and then determining the differences between the coordinates. A perspective correction factor is then calculated, which is multiplied by each coordinate difference.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: June 14, 2005
    Assignee: International Business Machines Corporation
    Inventor: David N. Ault, Jr.
  • Generating partials for perspective corrected texture coordinates in a four pixel texture pipeline
    Publication number: 20020190996
    Abstract: A method, program and apparatus for generating partial differential equations for perspective corrected texture coordinates in a computer graphics display are provided. The present invention comprises calculating texture coordinates for four adjacent pixels and then determining the differences between the coordinates. A perspective correction factor is then calculated, which is multiplied by each coordinate difference.
    Type: Application
    Filed: March 29, 2001
    Publication date: December 19, 2002
    Applicant: IBM Corporation
    Inventor: David N. Ault