Patents by Inventor Frédérique Ehrmann

Frédérique Ehrmann 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 the dynamic allocation of frequencies for multicarrier modulation systems
    Patent number: 7039120
    Abstract: The method of transmitting data in the form of symbols sent over an electromagnetic channel is characterized in that a measurement of significance is attributed to each group of data to be transmitted, in that the transmission reliability of the carriers is estimated dynamically, and in that the most significant data are sent over the most reliable carriers at each instant, the other data being sent over the carriers of decreasing reliability, in decreasing order of significance of the data.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: May 2, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: François Thoumy, Philippe Le Bars, Samuel Rousselin, Lionel Le Scolan, Frédérique Ehrmann
  • Compression of digital data and coding of the compressed data in order to protect them against transmission errors
    Patent number: 7027656
    Abstract: The invention concerns a method of adjusting at least one parameter for the compression of data representing physical quantities, the compressed data then being coded according to a coding mode in order to protect it from transmission errors. The methods includes, as from a required compressed data size, determining at least one characteristic of the coding mode, determining an effective size of the compressed data according to the required size and the at least one characteristic, and adjusting at least one compression parameter according to the effective size.
    Type: Grant
    Filed: May 11, 2001
    Date of Patent: April 11, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Félix Henry, Frédérique Ehrmann
  • Method and device of generation of one reference event from a frame of information
    Patent number: 6954471
    Abstract: The present invention concerns a method and an apparatus of generating a reference event in a receiving node receiving frames of information, when a frame of information is received, the method and the apparatus sample the frame of information in order to form sampled data, process sampled data in order to detect among said sampled data a specific data, monitor the number of processed sampled data until the detection of a specific data and generate a reference event according to the result of processing and monitoring.
    Type: Grant
    Filed: June 20, 2000
    Date of Patent: October 11, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Samuel Rousselin, Philippe Le Bars, Lionel Le Scolan, François Thoumy, Frédérique Ehrmann, Mohamed Braneci, Patrice Nezou, Pascal Rousseau