Patents Assigned to Creative Technologies Ltd.
  • Lattice structure for IIR and FIR filters with automatic normalization
    Patent number: 6442581
    Abstract: Apparatus providing a “reverse lattice” structure for IIR and FIR filters, which exhibits desirable scaling properties at no additional computational or memory cost. The reverse lattice structure implementation of an IIR filter scales down signals at sections corresponding to reflection coefficients close to 1 in magnitude. This feature provides automatic scaling for poles lying close to the unit circle which would otherwise produce large amplification factors.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: August 27, 2002
    Assignee: Creative Technologies Ltd.
    Inventor: Jean Laroche