Patents by Inventor Ralf WILLENBACHER

Ralf WILLENBACHER 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).

  • Piecewise inter-layer prediction for signals with enhanced dynamic range
    Patent number: 10123019
    Abstract: Pixel data of a video sequence with enhanced dynamic range (EDR) are predicted based on pixel data of a corresponding video sequence with standard dynamic range (SDR) and a piecewise inter-layer predictor. The output parameters of the piecewise predictor are computed based atleast on two sets of pre-computed values and a prediction cost criterion. The first set of pre-computed values applies to all input SDR frames and comprises a set of SDR pixel values raised to one or more integer power terms. The second set of pre-computed values is frame specific and is computed based on a histogram of an input SDR frame and pixel values of the corresponding EDR frame. The pre-computed values allow for a fast iterative algorithm to identify the best pivot points for the piecewise polynomials according to a prediction cost and to solve for the coefficients of the piecewise predictor.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: November 6, 2018
    Assignees: Dolby Laboratories Licensing Corporation, Dolby International AB
    Inventors: Guan-Ming Su, Qian Chen, Peng Yin, Ralf Willenbacher
  • Piecewise Inter-Layer Prediction for Signals with Enhanced Dynamic Range
    Publication number: 20170180734
    Abstract: Pixel data of a video sequence with enhanced dynamic range (EDR) are predicted based on pixel data of a corresponding video sequence with standard dynamic range (SDR) and a piecewise inter-layer predictor. The output parameters of the piecewise predictor are computed based atleast on two sets of pre-computed values and a prediction cost criterion. The first set of pre-computed values applies to all input SDR frames and comprises a set of SDR pixel values raised to one or more integer power terms. The second set of pre-computed values is frame specific and is computed based on a histogram of an input SDR frame and pixel values of the corresponding EDR frame. The pre-computed values allow for a fast iterative algorithm to identify the best pivot points for the piecewise polynomials according to a prediction cost and to solve for the coefficients of the piecewise predictor.
    Type: Application
    Filed: February 4, 2015
    Publication date: June 22, 2017
    Applicants: Dolby International AB, DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Guan-Ming SU, Qian CHEN, Peng YIN, Ralf WILLENBACHER