Patents by Inventor Subhayan Mukherjee

Subhayan Mukherjee 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).

  • Single-pass and multi-pass-based polynomial approximations for reshaping functions
    Patent number: 10223774
    Abstract: A processor for approximating a reshaping function using a multi-segment polynomial receives an input reshaping function. Given a number of target segments (N) and an initial maximum fitting error, in a first pass, it applies a first smoothing filter to the input reshaping function to generate a first smoothed reshaping function. Next, it generates a first multi-segment polynomial approximation of the input reshaping function based on one or more multi-segment polynomial approximation algorithms, the smoothed reshaping function, the number of target segments, and the initial maximum fitting error. The same process may be repeated in two or more similar passes that may include in each pass: reconstructing the reshaping function from the polynomial approximation of the previous pass, smoothing and segmenting the reconstructed reshaping function, and generating an updated multi-segment polynomial approximation according to an updated maximum fitting error.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: March 5, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Harshad Kadu, Subhayan Mukherjee, Guan-Ming Su
  • SINGLE-PASS AND MULTI-PASS-BASED POLYNOMIAL APPROXIMATIONS FOR RESHAPING FUNCTIONS
    Publication number: 20170308996
    Abstract: A processor for approximating a reshaping function using a multi-segment polynomial receives an input reshaping function. Given a number of target segments (N) and an initial maximum fitting error, in a first pass, it applies a first smoothing filter to the input reshaping function to generate a first smoothed reshaping function. Next, it generates a first multi-segment polynomial approximation of the input reshaping function based on one or more multi-segment polynomial approximation algorithms, the smoothed reshaping function, the number of target segments, and the initial maximum fitting error. The same process may be repeated in two or more similar passes that may include in each pass: reconstructing the reshaping function from the polynomial approximation of the previous pass, smoothing and segmenting the reconstructed reshaping function, and generating an updated multi-segment polynomial approximation according to an updated maximum fitting error.
    Type: Application
    Filed: July 12, 2017
    Publication date: October 26, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Harshad Kadu, Subhayan Mukherjee, Guan-Ming Su