Patents by Inventor Franck Bietrix

Franck Bietrix 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).

  • Device and method for processing an audio signal
    Patent number: 7295968
    Abstract: The invention concerns audio signal processing, comprising: a first processing of an audio source signal, using at least a mathematical transform applied on first sequences of samples obtained by applying first segmentation windows on the audio source signal; and a second audio processing applied on second sequences of samples obtained by applying second segmentation windows on the signal delivered by the first step; the two successive first windows and/or the two successive second windows overlapping, the overlaps being such that the segmentations are synchronous.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: November 13, 2007
    Assignee: Wavecom
    Inventors: Franck Bietrix, Hubert Cadusseau
  • Method for estimating the transfer function of a multicarrier signal transmission channel and corresponding receiver
    Patent number: 7242721
    Abstract: The invention concerns a method for estimating the transfer function of a multicarrier signal transmission channel consisting of a temporal succession of symbols of a set of data elements, each of the data elements modulating a carrier frequency of the signal, the data elements comprising pilots and so-called informative data elements. The invention is characterized in that said method comprises: a step which consists in determining a set of two-dimensional discrete prolate spheroidal sequences (DPSS); a step which consists in writing the transfer function in the form of a combination of at least some of the two-dimensional discrete prolate spheroidal sequences (DPSS); a step which consists in time-based and frequency-based two-dimensional interpolation of at least some of the coefficients of the combination, so as to obtain an estimation of the transfer function at any point of a time-frequency network.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: July 10, 2007
    Assignee: Wavecom
    Inventors: Michel Alard, Alexandre Rouxel, Nathalie Goudard, Franck Bietrix
  • Device and method for processing and audio signal
    Publication number: 20040236572
    Abstract: The invention concerns audio signal processing, comprising: a first processing of an audio source signal, using at least a mathematical transform applied on first sequences of samples obtained by applying first segmentation windows on the audio source signal; and a second audio processing applied on second sequences of samples obtained by applying second segmentation windows on the signal delivered by the first step; the two successive first windows and/or the two successive second windows overlapping, the overlaps being such that the segmentations are synchronous.
    Type: Application
    Filed: May 24, 2004
    Publication date: November 25, 2004
    Inventors: Franck Bietrix, Hubert Cadusseau