Patents by Inventor Davoud A. Jamshidi

Davoud A. Jamshidi 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).

  • Lossy Compression Techniques
    Publication number: 20230253979
    Abstract: Techniques are disclosed relating to compression of pixel data using different quantization for different regions of a block of pixels being compressed. In some embodiments, compression circuitry is configured to determine, for multiple components included in pixels of the block of pixels being compressed, respective smallest and greatest component values in respective regions of the block of pixels. The compression circuitry may determine, based on the determined smallest and greatest component values, to use a first number of bits to represent delta values relative to a base value for a first component in a first region and a second, different number of bits to represent delta values relative to a base value for a second component in the first region. The compression circuitry may then quantize delta values for the first and second components of pixels in the first region of the block of pixels using the determined first and second numbers of bits.
    Type: Application
    Filed: April 18, 2023
    Publication date: August 10, 2023
    Inventors: Tyson J. Bergland, Karthik Ramani, Stephan Lachowsky, Justin A. Hensley, Davoud A. Jamshidi
  • Lossy compression techniques
    Patent number: 11664816
    Abstract: Techniques are disclosed relating to compression of pixel data using different quantization for different regions of a block of pixels being compressed. In some embodiments, compression circuitry is configured to determine, for multiple components included in pixels of the block of pixels being compressed, respective smallest and greatest component values in respective regions of the block of pixels. The compression circuitry may determine, based on the determined smallest and greatest component values, to use a first number of bits to represent delta values relative to a base value for a first component in a first region and a second, different number of bits to represent delta values relative to a base value for a second component in the first region. The compression circuitry may then quantize delta values for the first and second components of pixels in the first region of the block of pixels using the determined first and second numbers of bits.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: May 30, 2023
    Assignee: Apple Inc.
    Inventors: Tyson J. Bergland, Karthik Ramani, Stephan Lachowsky, Justin A. Hensley, Davoud A. Jamshidi
  • Lossy Compression Techniques
    Publication number: 20210336632
    Abstract: Techniques are disclosed relating to compression of pixel data using different quantization for different regions of a block of pixels being compressed. In some embodiments, compression circuitry is configured to determine, for multiple components included in pixels of the block of pixels being compressed, respective smallest and greatest component values in respective regions of the block of pixels. The compression circuitry may determine, based on the determined smallest and greatest component values, to use a first number of bits to represent delta values relative to a base value for a first component in a first region and a second, different number of bits to represent delta values relative to a base value for a second component in the first region. The compression circuitry may then quantize delta values for the first and second components of pixels in the first region of the block of pixels using the determined first and second numbers of bits.
    Type: Application
    Filed: April 22, 2020
    Publication date: October 28, 2021
    Inventors: Tyson J. Bergland, Karthik Ramani, Stephan Lachowsky, Justin A. Hensley, Davoud A. Jamshidi