Patents by Inventor Brijesh Tripathi

Brijesh Tripathi 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: 20150347287
    Abstract: In an embodiment, a system on a chip (SOC) includes a component that remains powered when the remainder of the SOC is powered off. The component may include a sensor capture unit to capture data from various device sensors, and may filter the captured sensor data. Responsive to the filtering, the component may wake up the remainder of the SOC to permit the processing. The component may store programmable configuration data, matching the state at the time the SOC was most recently powered down, for the other components of the SOC, in order to reprogram them after wakeup. In some embodiments, the component may be configured to wake up the memory controller within the SOC and the path to the memory controller, in order to write the data to memory. The remainder of the SOC may remain powered down.
    Type: Application
    Filed: August 13, 2014
    Publication date: December 3, 2015
    Inventors: Brijesh Tripathi, Shane J. Keil, Manu Gulati, Jung Wook Cho, Erik P. Machnicki, Gilbert H. Herbeck, Timothy J. Millet, Joshua P. De Cesare, Anand Dalal
  • Publication number: 20150346001
    Abstract: In an embodiment, a system on a chip (SOC) includes a component that remains powered when the remainder of the SOC is powered off. The component may include a sensor capture unit to capture data from various device sensors, and may filter the captured sensor data. Responsive to the filtering, the component may wake up the remainder of the SOC to permit the processing. The component may store programmable configuration data, matching the state at the time the SOC was most recently powered down, for the other components of the SOC, in order to reprogram them after wakeup. In some embodiments, the component may be configured to wake up the memory controller within the SOC and the path to the memory controller, in order to write the data to memory. The remainder of the SOC may remain powered down.
    Type: Application
    Filed: August 13, 2014
    Publication date: December 3, 2015
    Inventors: Brijesh Tripathi, Shane J. Keil, Manu Gulati, Jung Wook Cho, Erik P. Machnicki, Gilbert H. Herbeck, Timothy J. Millet, Joshua P. de Cesare, Anand Dalal
  • Patent number: 9204172
    Abstract: Techniques are provided for encoding an extended image such that it is backwards compatible with existing decoding devices. An extended image format is defined such that the extended image format is consistent with an existing image format over the full range of the existing image format. Because the extended image format is consistent with the existing image format over the full range of the existing image format, additional image information that is included in an extended image can be extracted from the extended image. A base version of an image (expressed using the existing image format) may be encoded in a payload portion and the extracted additional information may be stored in a metadata portion of a widely supported image file format.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: December 1, 2015
    Assignee: Apple Inc.
    Inventors: Kenneth Greenebaum, Ian Hendry, Ian Ollmann, David Hayward, Brijesh Tripathi
  • Patent number: 9191551
    Abstract: Methods and apparatuses for performing lossless normalization of input pixel component values. The apparatus includes a normalization unit for converting pixel values from a range of 0 to (2N?1) to a normalized range from 0.0 to 1.0. The step size between adjacent values of the normalized range is 1/(2N?1), and a maximum input value of (2N?1) corresponds to a normalized value of 1. The normalization unit divides each input pixel component value by (2N?1) in order to preserve the fidelity of the color information contained in the input pixel component value.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: November 17, 2015
    Assignee: Apple Inc.
    Inventors: Brijesh Tripathi, Nitin Bhargava, Craig M. Okruhlica
  • Patent number: 9158350
    Abstract: Embodiments of an apparatus for implementing a display port interface are disclosed. The apparatus may include a source processor and a sink processor coupled through an interface. The interface may include a primary link, and an auxiliary link. The source processor may be operable to send a wake-up command to the sink processor via the auxiliary link, which may indicate a change in frequency on the primary link. The source processor to the sink processor via the primary link may send initialization parameters, which may include a clock data recovery lock parameter and an idle parameter.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: October 13, 2015
    Assignee: Apple Inc.
    Inventors: Brijesh Tripathi, Colin Whitby-Strevens, Geertjan Joordens, Moon Jung Kim, Raman S Thiara
  • Patent number: 9153212
    Abstract: In an embodiment, a display pipe is configured to composite one or more frames of images and/or video sequences to generate output frames for display. Additionally, the display pipe may be configured to compress an output frame and write the compressed frame to memory responsive to detecting static content in the output frames. The display pipe may also be configured to read the compressed frame from memory for display instead of reading the frames for compositing and display. In some embodiments, the display pipe may include an idle screen detect circuit configured to monitor the operation of the display pipe and/or the output frames to detect the static content.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: October 6, 2015
    Assignee: Apple Inc.
    Inventors: Brijesh Tripathi, Peter F. Holland, Albert C. Kuo
  • Patent number: 9148571
    Abstract: Techniques relating to correction of image distortion caused by movement of a camera unit during image capture. In one embodiment, an apparatus may include a camera unit and a scaling circuit. The apparatus may be configured to calculate a shift value for a line of an image captured by the camera unit, where the shift value is indicative of an amount of movement of the camera unit during at least a portion of capture of the image. The scaling circuit may be configured to operate on the line starting at a line position that is based on the calculated shift value. The calculated shift value may be based on movement information generated by a motion sensor. The scaling circuit may include a digital differential analyzer and one or more multi-tap polyphase filters. The line position may be specified as a fractional pixel value.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: September 29, 2015
    Assignee: Apple Inc.
    Inventor: Brijesh Tripathi
  • Patent number: 9123278
    Abstract: Methods and graphics processing pipelines for performing inline chroma downsampling of pixel data. The graphics processing pipeline includes a chroma downsampling unit for performing buffer-free downsampling of chroma pixel components. A vertical column of chroma pixel components is received in each clock cycle by the chroma downsampling unit, and downsampled chroma pixel components are generated on every clock cycle or every other clock cycle. Vertical, horizontal, and vertical and horizontal downsampling can be performed without buffers by the chroma downsampling unit. A programmable configuration register in the chroma downsampling unit determines the type of downsampling that is implemented.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: September 1, 2015
    Assignee: Apple Inc.
    Inventors: Brijesh Tripathi, Craig M. Okruhlica, Nitin Bhargava
  • Patent number: 9116639
    Abstract: Embodiments of an apparatus for implementing a display port interface are disclosed. The apparatus may include a source processor and a sink processor coupled through an interface. The interface may include a primary link, an auxiliary link, and a hot plug detect link. The source processor may be operable to send a wake-up command to the sink processor via the auxiliary link. The source processor may send initialization parameters to the sink processor via the primary link. The initialization parameters may include a clock data recovery lock parameter and an idle parameter. Following the initialization parameters, the source processor may send a synchronization signal to the sink processor via the primary link. The source processor may then send a sleep command via the primary link to the sink processor.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: August 25, 2015
    Assignee: Apple Inc.
    Inventor: Brijesh Tripathi
  • Publication number: 20150222930
    Abstract: Techniques are provided for encoding an extended image such that it is backwards compatible with existing decoding devices. An extended image format is defined such that the extended image format is consistent with an existing image format over the full range of the existing image format. Because the extended image format is consistent with the existing image format over the full range of the existing image format, additional image information that is included in an extended image can be extracted from the extended image. A base version of an image (expressed using the existing image format) may be encoded in a payload portion and the extracted additional information may be stored in a metadata portion of a widely supported image file format.
    Type: Application
    Filed: April 10, 2015
    Publication date: August 6, 2015
    Inventors: Kenneth Greenebaum, Ian Hendry, Ian Ollmann, David Hayward, Brijesh Tripathi
  • Publication number: 20150213780
    Abstract: Embodiments of an apparatus for implementing a display port interface are disclosed. The apparatus may include a source processor and a sink processor coupled through an interface. The sink processor may be operable to send a synchronization signal to the source processor through the interface. The source processor may be operable, dependent upon the synchronization signal, to send data to the sink processor.
    Type: Application
    Filed: April 10, 2015
    Publication date: July 30, 2015
    Inventor: Brijesh Tripathi
  • Patent number: 9087393
    Abstract: In an embodiment, a system includes hardware optimized for communication to a network display. The hardware may include a display pipe unit that is configured to composite one or more static images and one or more frames from video sequences to form frames for display by a network display. The display pipe unit may include a writeback unit configured to write the composite frames back to memory, from which the frames can be optionally encoded using video encoder hardware and packetized for transmission over a network to a network display. In an embodiment, the display pipe unit may be configured to issue interrupts to the video encoder during generation of a frame, to overlap encoding and frame generation.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: July 21, 2015
    Assignee: Apple Inc.
    Inventors: Brijesh Tripathi, Peter F. Holland, Timothy J. Millet
  • Patent number: 9058676
    Abstract: In an embodiment, a display pipe is configured to composite one or more frames of images and/or video sequences to generate output frames for display. Additionally, the display pipe may be configured to compress an output frame and write the compressed frame to memory responsive to detecting static content in the output frames. The display pipe may also be configured to read the compressed frame from memory for display instead of reading the frames for compositing and display. In some embodiments, the display pipe may include an idle screen detect circuit configured to monitor the operation of the display pipe and/or the output frames to detect the static content.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: June 16, 2015
    Assignee: Apple Inc.
    Inventors: Brijesh Tripathi, Peter F. Holland, Albert C. Kuo
  • Patent number: 9036908
    Abstract: Techniques are provided for encoding an extended image such that it is backwards compatible with existing decoding devices. An extended image format is defined such that the extended image format is consistent with an existing image format over the full range of the existing image format. Because the extended image format is consistent with the existing image format over the full range of the existing image format, additional image information that is included in an extended image can be extracted from the extended image. A base version of an image (expressed using the existing image format) may be encoded in a payload portion and the extracted additional information may be stored in a metadata portion of a widely supported image file format.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: May 19, 2015
    Assignee: Apple Inc.
    Inventors: Kenneth Greenebaum, Ian Hendry, Ian Ollmann, David Hayward, Brijesh Tripathi
  • Patent number: 9035961
    Abstract: A system and method for efficiently allocating data in a memory hierarchy. A system includes a memory controller for controlling accesses to a memory and a display controller for processing video frame data. The memory controller includes a cache capable of storing data read from the memory. A given video frame may be processed by the display controller and presented on a respective display screen. During processing, control logic within the display controller sends multiple memory access requests to the memory controller with cache hint information. For the frame data, the cache hint information may alternate between (i) indicating to store frame data read in response to respective requests in the memory cache and (ii) indicating to not store the frame data read in response to respective requests in the memory cache.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: May 19, 2015
    Assignee: Apple Inc.
    Inventors: Brijesh Tripathi, Peter F. Holland
  • Patent number: 9015217
    Abstract: In an embodiment, hardware implementing a transcendental or other non-linear function is based on a series expansion of the function. For example, a Taylor series expansion may be used as the basis. One or more of the initial terms of the Taylor series may be used, and may be implemented in hardware. In some embodiments, modifications to the Taylor series expansion may be used to increase the accuracy of the result. In one embodiment, a variety of bit widths for the function operands may be acceptable for use in a given implementation. A methodology for building a library of series-approximated components for use in integrated circuit design is provided which synthesizes the acceptable implementations and tests the results for accuracy. A smallest (area-wise) implementation which produces a desired level of accuracy may be selected as the library element.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: April 21, 2015
    Assignee: Apple Inc.
    Inventors: Vaughn T. Arnold, Brijesh Tripathi, Albert Kuo
  • Patent number: 9013493
    Abstract: Embodiments of an apparatus for implementing a display port interface are disclosed. The apparatus may include a source processor and a sink processor coupled through an interface. The source processor may be operable to select a frequency from a continuous range of frequencies, and transmit data to the sink processor at the selected frequency. A phase lock circuit may be included in the sink processor. The phase lock circuit may be configured to generate a signal at the selected frequency dependent upon the transmitted data. The generated signal may be in phase with the transmitted data.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: April 21, 2015
    Assignee: Apple Inc.
    Inventors: Brijesh Tripathi, Colin Whitby-Strevens, Geertjan Joordens, Moon Jung Kim, Raman S Thiara
  • Publication number: 20150093023
    Abstract: Techniques are provided for encoding an extended image such that it is backwards compatible with existing decoding devices. An extended image format is defined such that the extended image format is consistent with an existing image format over the full range of the existing image format. Because the extended image format is consistent with the existing image format over the full range of the existing image format, additional image information that is included in an extended image can be extracted from the extended image. A base version of an image (expressed using the existing image format) may be encoded in a payload portion and the extracted additional information may be stored in a metadata portion of a widely supported image file format.
    Type: Application
    Filed: September 30, 2013
    Publication date: April 2, 2015
    Inventors: Kenneth Greenebaum, Ian Hendry, Ian Ollmann, David Hayward, Brijesh Tripathi
  • Publication number: 20150062134
    Abstract: A graphics system may include one or more processing units for processing a current display frame, each processing unit including a plurality of parameter registers for storing parameter settings used in processing the current display frame. A parameter buffer in the graphics system may store frame packets, with each frame packet containing information corresponding to parameter settings to be used for at least one display frame. A control circuit coupled to the buffer and to the one or more processing units may retrieve a top frame packet from the parameter buffer and determine if the frame packet is an internal type, i.e., intended for internal registers in a respective processing unit or if it is an external type, i.e., intended for an external register elsewhere in the graphics system. Based on the type of frame packet, the control circuit may update one or more register values accordingly.
    Type: Application
    Filed: September 4, 2013
    Publication date: March 5, 2015
    Applicant: Apple Inc.
    Inventors: Peter F. Holland, Brijesh Tripathi, Hao Chen
  • Patent number: 8963940
    Abstract: One embodiment of the invention sets forth a method for transmitting display data to a display device. The method includes the steps of receiving a contract for a frame of display data, preparing the frame of display data to ensure the timing requirements of the display device can be satisfied based on the contract, and transmitting the frame of display data to the display device while the contract is pending.
    Type: Grant
    Filed: April 2, 2007
    Date of Patent: February 24, 2015
    Assignee: NVIDIA Corporation
    Inventors: Duncan A. Riach, Robert A. Alfieri, Brijesh Tripathi, Patrick R. Marchand