Patents by Inventor Meinard MUELLER

Meinard MUELLER 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).

  • Apparatus and method for harmonic-percussive-residual sound separation using a structure tensor on spectrograms
    Patent number: 10770051
    Abstract: An apparatus for analysing a magnitude spectrogram of an audio signal is provided. The apparatus includes a frequency change determiner being configured to determine a change of a frequency for each time-frequency bin of a plurality of time-frequency bins of the magnitude spectrogram of the audio signal depending on the magnitude spectrogram of the audio signal. Moreover, the apparatus includes a classifier being configured to assign each time-frequency bin of the plurality of time-frequency bins to a signal component group of two or more signal component groups depending on the change of the frequency determined for the time-frequency bin.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: September 8, 2020
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Andreas Niedermeier, Richard Füg, Sascha Disch, Meinard Müller, Jonathan Driedger
  • Apparatus and method for processing an audio signal to obtain a processed audio signal using a target time-domain envelope
    Patent number: 10373623
    Abstract: Subject of the invention is an apparatus described by a schematic block diagram for processing an audio signal to obtain a processed audio signal. The apparatus includes a phase calculator for calculating phase values for spectral values of a sequence of frequency-domain frames representing overlapping frames of the audio signal. Moreover, the phase calculator is configured to calculate the phase values based on information on a target time-domain envelope related to the processed audio signal, so that the processed audio signal has at least in an approximation the target time-domain envelope and a spectral envelope determined by the sequence of frequency-domain frames.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: August 6, 2019
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Christian Dittmar, Meinard Mueller, Sascha Disch
  • APPARATUS AND METHOD FOR HARMONIC-PERCUSSIVE-RESIDUAL SOUND SEPARATION USING A STRUCTURE TENSOR ON SPECTROGRAMS
    Publication number: 20190012999
    Abstract: An apparatus for analysing a magnitude spectrogram of an audio signal is provided. The apparatus includes a frequency change determiner being configured to determine a change of a frequency for each time-frequency bin of a plurality of time-frequency bins of the magnitude spectrogram of the audio signal depending on the magnitude spectrogram of the audio signal. Moreover, the apparatus includes a classifier being configured to assign each time-frequency bin of the plurality of time-frequency bins to a signal component group of two or more signal component groups depending on the change of the frequency determined for the time-frequency bin.
    Type: Application
    Filed: September 12, 2018
    Publication date: January 10, 2019
    Inventors: Andreas NIEDERMEIER, Richard FÜG, Sascha DISCH, Meinard MÜLLER, Jonathan DRIEDGER
  • APPARATUS AND METHOD FOR PROCESSING AN AUDIO SIGNAL TO OBTAIN A PROCESSED AUDIO SIGNAL USING A TARGET TIME-DOMAIN ENVELOPE
    Publication number: 20170345433
    Abstract: Subject of the invention is an apparatus described by a schematic block diagram for processing an audio signal to obtain a processed audio signal. The apparatus includes a phase calculator for calculating phase values for spectral values of a sequence of frequency-domain frames representing overlapping frames of the audio signal. Moreover, the phase calculator is configured to calculate the phase values based on information on a target time-domain envelope related to the processed audio signal, so that the processed audio signal has at least in an approximation the target time-domain envelope and a spectral envelope determined by the sequence of frequency-domain frames.
    Type: Application
    Filed: August 21, 2017
    Publication date: November 30, 2017
    Inventors: Christian DITTMAR, Meinard MUELLER, Sascha DISCH