Patents by Inventor Yves Bobichon

Yves Bobichon 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).

  • Method and device for compressing data to be transmitted at constant bit rate
    Patent number: 7336843
    Abstract: The invention concerns a method of compressing and transmitting digital data, in particular images, at a constant bit rate, the method comprising the following steps: splitting input data into blocks of data, applying an orthogonal or bi-orthogonal transform (12) to each block, quantizing (14) the coefficients obtained by applying the transform, entropically coding (20) the quantized coefficients, temporarily saving the data resulting from coding in a buffer memory (18), removing a particular number of bits from the memory for each block of digital data, and adjusting the quantizing step by applying a control function (50) to obtain, after coding, a number of bits close to the number of bits removed from the memory for each block of data. The control function (50) takes account of the data bit rate measured for at least the preceding block.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: February 26, 2008
    Assignee: Alcatel
    Inventors: Yves Bobichon, Frédéric Falzon
  • Method and device for comprising data to be transmitted at constant bit rate
    Publication number: 20040197024
    Abstract: The invention concerns a method of compressing and transmitting digital data, in particular images, at a constant bit rate, the method comprising the following steps:
    Type: Application
    Filed: February 19, 2004
    Publication date: October 7, 2004
    Inventors: Yves Bobichon, Frederic Falzon