Patents by Inventor Susanna Malm

Susanna Malm 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).

  • Objective measurement of audio quality
    Patent number: 8467893
    Abstract: In an apparatus for objective perceptual evaluation of speech quality, parameters BandwidthRef and BandwidthTest representing the bandwidth are forwarded to a calculator 30 for calculating the relative bandwidth difference ?BW between a reference signal and a test signal. ?BW is forwarded to a calculator 32, which determines the value of a weighting parameter ?. Preferably a sealing unit 33 scales or normalizes the disturbance density D and the asymmetric disturbance density DA, for example to the range [0,1]. The values of ?BW and ? are forwarded to a bandwidth compensator 34, which also receives the preferably scaled disturbance density D and asymmetric disturbance density DA. The bandwidth compensated disturbance densities D*, DA* are forwarded to a linear combiner 42, which forms a score representing predicted quality of the test signal.
    Type: Grant
    Filed: April 9, 2008
    Date of Patent: June 18, 2013
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Volodya Grancharov, Susanna Malm
  • Objective Measurement of Audio Quality
    Publication number: 20110119039
    Abstract: In an apparatus for objective perceptual evaluation of speech quality, parameters BandwidthRef and BandwidthTest representing the bandwidth are forwarded to a calculator 30 for calculating the relative bandwidth difference ?BW between a reference signal and a test signal. ?BW is forwarded to a calculator 32, which determines the value of a weighting parameter ?. Preferably a sealing unit 33 scales or normalizes the disturbance density D and the asymmetric disturbance density DA, for example to the range [0,1]. The values of ?BW and ? are forwarded to a bandwidth compensator 34, which also receives the preferably scaled disturbance density D and asymmetric disturbance density DA. The bandwidth compensated disturbance densities D*, DA* are forwarded to a linear combiner 42, which forms a score representing predicted quality of the test signal.
    Type: Application
    Filed: April 9, 2008
    Publication date: May 19, 2011
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Volodya Grancharov, Susanna Malm