Patents by Inventor Fredrik Henn

Fredrik Henn 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).

  • Enhancing perceptual performance of high frequency reconstruction coding methods by adaptive filtering
    Publication number: 20020087304
    Abstract: The present invention proposes a new method and a new apparatus for enhancement of audio source coding systems utilizing high frequency reconstruction (HFR). It utilizes adaptive filtering to reduce artifacts due to different tonal characteristics in different frequency ranges of an audio signal upon which HFR is performed. Tie present invention is applicable to both speech coding and natural audio coding systems.
    Type: Application
    Filed: November 14, 2001
    Publication date: July 4, 2002
    Inventors: Kristofer Kjorling, Per Ekstrand, Fredrik Henn, Lars Villemoes