Patents Represented by Attorney, Agent or Law Firm Top, Pruner & Hu, P.C.
  • Combining soft decisions in a weather band radio
    Patent number: 8270544
    Abstract: According to one aspect of the present invention, an apparatus is provided to enable weather band radio signals to be received and processed using a digital signal processor (DSP). The DSP can include functionality to implement both frequency modulation (FM) demodulation and weather band data demodulation, i.e., specific area encoding (SAME) demodulation. In one such embodiment, soft decision samples of a SAME message can be combined, and based on a combined result, a hard decision unit can generate a bit value of weather band data.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: September 18, 2012
    Assignee: Silicon Laboratories Inc.
    Inventor: Junsong Li
  • Method and device for cancelling stereophonic echo with frequency domain filtering
    Patent number: 6738480
    Abstract: The filtering coefficients of a frequency domain stereophonic echo canceller are adapted by a method which takes account of the cross-correlation between the input signals relating to the two channels. In particular, the adaptation process takes account of the coherence function, reducing the problems commonly encountered with stereophonic cancellation schemes when relatively correlated input signals occur.
    Type: Grant
    Filed: May 10, 2000
    Date of Patent: May 18, 2004
    Assignee: Matra Nortel Communications
    Inventors: Frédéric Berthault, François Capman