Patents by Inventor Alexander TSCHEKALINSKIJ

Alexander TSCHEKALINSKIJ 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).

  • Publication number: 20200272685
    Abstract: There are provided methods and apparatus for performing modified cosine transformation (MDCT) with an analysis/synthesis windowing function, using an analysis windowing function having a meandering portion which passes a linear function in correspondence of at least four points.
    Type: Application
    Filed: May 7, 2020
    Publication date: August 27, 2020
    Inventors: Markus SCHNELL, Manfred LUTZKY, Alexander TSCHEKALINSKIJ, Ralf GEIGER
  • Publication number: 20200273475
    Abstract: In apparatus, methods, and programs for selecting pitch lag, an encoder obtains a first and a second estimates of a pitch lag for a current frame. A selected value is chosen by selection between the first and the second estimates, based on a first and a second correlation measurements. The second estimate is conditioned by the pitch lag selected at the previous frame. The selection is based on a comparison between: a downscaled version of a first correlation measurement associated to the current frame and obtained at a lag corresponding to the first estimate; and a second correlation measurement associated to the current frame and obtained at a lag corresponding to the second estimate.
    Type: Application
    Filed: May 7, 2020
    Publication date: August 27, 2020
    Inventors: Emmanuel RAVELLI, Martin DIETZ, Michael SCHNABEL, Arthur TRITTHART, Alexander TSCHEKALINSKIJ
  • Publication number: 20200265847
    Abstract: There are provided methods and apparatus for performing modified cosine transformation (MDCT) with an analysis/synthesis windowing function, using an analysis windowing function having a meandering portion which passes a linear function in correspondence of at least four points.
    Type: Application
    Filed: May 6, 2020
    Publication date: August 20, 2020
    Inventors: Markus SCHNELL, Manfred LUTZKY, Alexander TSCHEKALINSKIJ, Ralf GEIGER
  • Publication number: 20200265850
    Abstract: In methods and apparatus for performing temporal noise shaping, an apparatus may have a temporal noise shaping, TNS, tool for performing linear prediction, LP, filtering on an information signal including a plurality of frames; and a controller configured to control the TNS tool so that the TNS tool performs LP filtering with: a first filter whose impulse response has a higher energy; and a second filter whose impulse response has a lower energy than the first filter, wherein the second filter is not an identity filter, wherein the controller is configured to choose between filtering with the first filter, and filtering with the second filter on the basis of a frame metrics.
    Type: Application
    Filed: May 7, 2020
    Publication date: August 20, 2020
    Inventors: Emmanuel RAVELLI, Manfred LUTZKY, Markus SCHNELL, Alexander TSCHEKALINSKIJ, Goran MARKOVIC, Stefan GEYERSBERGER
  • Publication number: 20200265846
    Abstract: An assignment of one of phase set of different loss concealment tools of an audio decoder to a portion of the audio signal to be decoded from a data stream, which portion is affected by loss, that is the selection out of the set of different loss concealment tools, may be made in a manner leading to a more pleasant loss concealment if the assignment/selection is done based on two measures: A first measure which is determined measures a spectral position of a spectral centroid of a spectrum of the audio signal and a second measure which is determined measures a temporal predictability of the audio signal. The assigned or selected loss concealment tool may then be used to recover the portion of the audio signal.
    Type: Application
    Filed: May 6, 2020
    Publication date: August 20, 2020
    Inventors: Adrian TOMASEK, Emmanuel RAVELLI, Markus SCHNELL, Alexander TSCHEKALINSKIJ, Michael SCHNABEL, Ralph SPERSCHNEIDER