Patents Assigned to Kakadu R & D Pty Ltd
  • Patent number: 12273534
    Abstract: Methods for management of encoding complexity for image and video encoding, for example for algorithms belonging to the JPEG 2000 family of standards, where the encoding process targets a given compressed size (i.e. a total coded length) for the image or for each frame of a video sequence. A set of methods for complexity constrained encoding of HTJ2K code-streams, involving collection of local or global statistics for each sub-band (not for each code-block), generation of forecasts for the statistics of sub-band samples that have not yet been produced by spatial transformation and quantization processes, and the use of this information to generate a global quantization parameter, from which the coarsest bit-plane to generate in each code-block can be deduced. Coded length estimates can be generated in a manner that enables latency and memory to be separately optimized against encoded image quality, while maintaining low computational complexity.
    Type: Grant
    Filed: January 11, 2024
    Date of Patent: April 8, 2025
    Assignee: KAKADU R & D PTY LTD
    Inventor: David Scott Taubman
  • Patent number: 11936879
    Abstract: Methods for management of encoding complexity for image and video encoding, for example for algorithms belonging to the JPEG 2000 family of standards, where the encoding process targets a given compressed size (i.e. a total coded length) for the image or for each frame of a video sequence. Described are a set of methods for complexity constrained encoding of HTJ2K code-streams, involving collection of local or global statistics for each sub-band (not for each code-block), generation of forecasts for the statistics of sub-band samples that have not yet been produced by spatial transformation and quantization processes, and the use of this information to generate a global quantization parameter, from which the coarsest bit-plane to generate in each code-block can be deduced. Coded length estimates can be generated in a manner that enables latency and memory to be separately optimized against encoded image quality, while maintaining low computational complexity.
    Type: Grant
    Filed: October 26, 2020
    Date of Patent: March 19, 2024
    Assignee: KAKADU R & D PTY LTD
    Inventor: David Scott Taubman
  • Patent number: 11778195
    Abstract: An interpolation method for coded motion information available to a video coder, comprising the steps of incorporating edge information derived from coded video frames to perform an edge-sensitive interpolation of coded motion vectors (“seeds”) in order to obtain a dense motion description.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: October 3, 2023
    Assignee: Kakadu R & D Pty Ltd.
    Inventors: Dominic Patric Ruefenacht, David Scott Taubman
  • Patent number: 11595692
    Abstract: The invention relates to a method and apparatus for image compression, particularly to an improved block-coding apparatus and method for image compression. Image compression systems such as JPEG and JPEG2000 are known and popular standards for image compression. Many of the advantageous features of JPEG2000 derive from the use of the EBCOT algorithm (Embedded Block-Coding with Optimized Truncation). One drawback of the JPEG2000 standards is computational complexity. This application discloses a relatively fast block-coding algorithm, particularly as compared with the standard JPEG2000 EBCOT algorithm. Computational complexity is reduced.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: February 28, 2023
    Assignee: KAKADU R & D PTY LTD
    Inventor: David Scott Taubman
  • Patent number: 11470322
    Abstract: The invention relates to a method and apparatus for image compression, particularly to an improved block-coding apparatus and method for image compression. Image compression systems such as JPEG and JPEG2000 are known and popular standards for image compression. Many of the advantageous features of JPEG2000 derive from the use of the EBCOT algorithm (Embedded Block-Coding with Optimized Truncation). One drawback of the JPEG2000 standards is computational complexity. This application discloses a relatively fast block-coding algorithm, particularly as compared with the standard JPEG2000 EBCOT algorithm. Computational complexity is reduced.
    Type: Grant
    Filed: March 15, 2021
    Date of Patent: October 11, 2022
    Assignee: KAKADU R & D PTY LTD
    Inventors: David Scott Taubman, Reji Kuruvilla Mathew, Aous Thabit Naman
  • Patent number: 11265550
    Abstract: The present invention relates to an improved method and apparatus for image compression and particularly to an improved block coding apparatus and method for compression for use with the JPEG2000 standard, although not limited to this. Methods for coding and decoding blocks and subbands samples derived from still images video frames or related media, involving three bit-streams and the partitioning of samples from the blocking to define groups, is provided. A first bit-stream encodes the significance of whole groups. A second bit-stream encodes the significance of individual samples within each group. The second bit-stream also encodes an unsigned residual value for each significant group. A third bit stream provides a sign bit and any additional magnitude bits required to represent the significant sample values. Exponent predictors are computal using both exponent bounds and the additional magnitude bits associated with previous samples in the block.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: March 1, 2022
    Assignee: KAKADU R & D PTY LTD
    Inventor: David Scott Taubman
  • Patent number: 11122281
    Abstract: A method of representing displacement information between the frames of a video and/or multiview sequence, comprising the steps of assigning a plurality of the frames to a Group of Pictures (GOPs), providing a base displacement model for each GOP, the base displacement model describing a displacement field that carries each location in a designated base frame of the GOP to a corresponding location in each other the frame of the GOP, and inferring other displacement relationships between the frames of the GOP from the base displacement model. Embodiments include a piecewise smooth displacement field, deformable mesh, reverse displacement field, double mapping, synthesize optical blur and foreground-background discrimination process.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: September 14, 2021
    Assignee: KAKADU R&D PTY LTD.
    Inventors: David Scott Taubman, Dominic Patric Ruefenacht
  • Publication number: 20210258581
    Abstract: The invention relates to a method and apparatus for image compression, particularly to an improved block-coding apparatus and method for image compression. Image compression systems such as JPEG and JPEG2000 are known and popular standards for image compression. Many of the advantageous features of JPEG2000 derive from the use of the EBCOT algorithm (Embedded Block-Coding with Optimized Truncation). One drawback of the JPEG2000 standards is computational complexity. This application discloses a relatively fast block-coding algorithm, particularly as compared with the standard JPEG2000 EBCOT algorithm. Computational complexity is reduced.
    Type: Application
    Filed: March 15, 2021
    Publication date: August 19, 2021
    Applicant: KAKADU R & D PTY LTD
    Inventors: David Scott TAUBMAN, Reji Kuruvilla Mathew, Aous Thabit Naman
  • Patent number: 10951897
    Abstract: The invention relates to a method and apparatus for image compression, particularly to an improved block-coding apparatus and method for image compression. Image compression systems such as JPEG and JPEG2000 are known and popular standards for image compression. Many of the advantageous features of JPEG2000 derive from the use of the EBCOT algorithm (Embedded Block-Coding with Optimized Truncation). One drawback of the JPEG2000 standards is computational complexity. This application discloses a relatively fast block-coding algorithm, particularly as compared with the standard JPEG2000 EBCOT algorithm. Computational complexity is reduced.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: March 16, 2021
    Assignee: KAKADU R & D PTY LTD
    Inventors: David Scott Taubman, Reji Kuruvilla Mathew, Aous Thabit Naman
  • Publication number: 20200021824
    Abstract: A method of representing displacement information between the frames of a video and/or multiview sequence, comprising the steps of assigning a plurality of the frames to a Group of Pictures (GOPs), providing a base displacement model for each GOP, the base displacement model describing a displacement field that carries each location in a designated base frame of the GOP to a corresponding location in each other the frame of the GOP, and inferring other displacement relationships between the frames of the GOP from the base displacement model. Embodiments include a piecewise smooth displacement field, deformable mesh, reverse displacement field, double mapping, synthesize optical blur and foreground-background discrimination process.
    Type: Application
    Filed: September 21, 2017
    Publication date: January 16, 2020
    Applicant: Kakadu R & D Pty Ltd
    Inventors: David Scott TAUBMAN, Dominic Patric RUEFENACHT