Patents Represented by Law Firm Twonsend and Townsend and Crew LLP
  • Sampling rate conversion using digital differential analyzers
    Patent number: 5835160
    Abstract: Magnification/reduction is achieved by a single FIR filter under the control of a Digital Differential Analyzer (DDA) as would be used to simulate a perfectly straight line on a two-dimensional raster. The single FIR filter combines the processes of interpolation, filter, and decimation. The DDA is programmed with the desired magnification/reduction ratio and provides signals that control shifting of input samples into the FIR filter and selection of FIR coefficients for the FIR filter.
    Type: Grant
    Filed: August 12, 1996
    Date of Patent: November 10, 1998
    Assignee: Oak Technology, Inc.
    Inventors: Chih-Kang Chen, Anil Sawe, David Tran