Patents by Inventor Samir N. Hulyalkar

Samir N. Hulyalkar 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).

  • Patent number: 10332481
    Abstract: Methods are disclosed for adaptive display management using look-up table interpolation. Given a target maximum brightness value for a display, a new look-up table (LUT) for color gamut mapping is determined based on interpolating values from two other pre-computed color gamut LUTs; one computed for a first maximum display brightness larger than the target maximum brightness value, and one computed for a second maximum display brightness lower than the target brightness value. An interpolation scale is computed based at least on the target maximum brightness value and the first maximum display brightness. Methods to reduce the computation load for the translation of RGB data from one color representation (say, ST 2084) to another color representation (say, BT 1866) using fast interpolation methods are also presented.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: June 25, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Robin Atkins, Samir N. Hulyalkar
  • Patent number: 10242627
    Abstract: Systems and methods are disclosed for dynamically adjusting the backlight of a display during video playback. Given an input video stream and associated minimum, average, or maximum luminance values of the video frames in the video stream, values of a function of the frame min, mid, or max luminance values are filtered using a temporal filter to generate a filtered output value for each frame. The instantaneous dynamic range of a target display is determined based on the filtered output value and the minimum and maximum brightness values of the display. A backlight control level is computed based on the instantaneous dynamic range, and the input signal is tone mapped by a display management process to be displayed on the target display at the selected backlight level. The design of a temporal filter based on an exponential moving average filter and scene-change detection is presented.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: March 26, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Suzanne Farrell, Scott Daly, Robin Atkins, Timo Kunkel, Gregory John Ward, Samir N. Hulyalkar, Ning Xu
  • Publication number: 20180366070
    Abstract: Systems and methods are disclosed for dynamically adjusting the backlight of a display during video playback. Given an input video stream and associated minimum, average, or maximum luminance values of the video frames in the video stream, values of a function of the frame min, mid, or max luminance values are filtered using a temporal filter to generate a filtered output value for each frame. The instantaneous dynamic range of a target display is determined based on the filtered output value and the minimum and maximum brightness values of the display. A backlight control level is computed based on the instantaneous dynamic range, and the input signal is tone mapped by a display management process to be displayed on the target display at the selected backlight level. The design of a temporal filter based on an exponential moving average filter and scene-change detection is presented.
    Type: Application
    Filed: May 11, 2016
    Publication date: December 20, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Suzanne FARRELL, Scott DALY, Robin ATKINS, Timo KUNKEL, Gregory John WARD, Samir N. HULYALKAR, Ning XU
  • Publication number: 20180322679
    Abstract: Systems and methods for overlaying a second image/video data onto a first image/video data are described herein. The first image/video data may be intended to be rendered on a display with certain characteristics—e.g., HDR, EDR, VDR or UHD capabilities. The second image/video data may comprise graphics, closed captioning, text, advertisement—or any data that may be desired to be overlaid and/or composited onto the first image/video data. The second image/video data may be appearance mapped according to the image statistics and/or characteristics of the first image/video data. In addition, such appearance mapping may be made according to the characteristics of the display that the composite data is to be rendered. Such appearance mapping is desired to render a composite data that is visually pleasing to a viewer, rendered upon a desired display.
    Type: Application
    Filed: July 17, 2018
    Publication date: November 8, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Timo KUNKEL, Ning XU, Tao CHEN, Bongsun LEE, Samir N. HULYALKAR
  • Patent number: 10097820
    Abstract: A high resolution 3D image may be encoded into a first multiplexed image frame and a second multiplexed image frame in a base layer (BL) video signal and an enhancement layer (EL) video signal. The first multiplexed image frame may comprise horizontal high resolution image data for both eyes, while the second multiplexed image frame may comprise vertical high resolution image data for both eyes. Encoded symmetric-resolution image data for the 3D image may be distributed to a wide variety of devices for 3D image processing and rendering. A recipient device may reconstruct reduced resolution 3D image from one of the first multiplexed image frame or the second multiplexed image frame. A recipient device may also reconstruct high resolution 3D image by combining high resolution image data from both of the first multiplexed image frame and the second multiplexed image frame.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: October 9, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Tao Chen, Hariharan Ganapathy, I, Samir N. Hulyalkar, Gopi Lakshminarayanan, Peng Yin, Taoran Lu, Walter J. Husak
  • Patent number: 10055866
    Abstract: Systems and methods for overlaying a second image/video data onto a first image/video data are described herein. The first image/video data may be intended to be rendered on a display with certain characteristics—e.g., HDR, EDR, VDR or UHD capabilities. The second image/video data may comprise graphics, closed captioning, text, advertisement—or any data that may be desired to be overlaid and/or composited onto the first image/video data. The second image/video data may be appearance mapped according to the image statistics and/or characteristics of the first image/video data. In addition, such appearance mapping may be made according to the characteristics of the display that the composite data is to be rendered. Such appearance mapping is desired to render a composite data that is visually pleasing to a viewer, rendered upon a desired display.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: August 21, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Timo Kunkel, Ning Xu, Tao Chen, Bongsun Lee, Samir N. Hulyalkar
  • Patent number: 10056042
    Abstract: Systems and methods are disclosed for filtering metadata to be used in display management. Given an input video stream and input metadata comprising at least one of minimum, average, or maximum luminance values of the video frames in the video stream, values of a function of the input metadata are filtered using a temporal filter to generate filtered metadata, wherein the filtering is based only on metadata for input frames in the same scene. Methods for temporal filtering based on an exponential moving average filter or a look-ahead sliding window filter are presented, including methods for scene-change detection using the input metadata.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: August 21, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Robin Atkins, Gregory John Ward, Samir N. Hulyalkar, Guan-Ming Su, Sheng Qu
  • Publication number: 20180220144
    Abstract: In a method to code and transmit scalable HDR video signals, HDR signals are processed and encoded in the IPT-PQ color space to generate a base layer at reduced spatial resolution and/or dynamic range, and an enhancement layer with a residual signal. A signal reshaping block before the base layer encoder allows for improved coding of HDR signals using a reduced bit depth. A decoder can use a BL decoder and backward reshaping to generate a decoded BL HDR signal at a reduced dynamic range and/or spatial resolution, or it can combine the decoded BL HDR signal and the EL stream to generate a decoded HDR signal at full dynamic range and full resolution.
    Type: Application
    Filed: July 20, 2016
    Publication date: August 2, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Guan-Ming Su, Sheng Qu, Samir N. Hulyalkar, David Brooks
  • Publication number: 20180144692
    Abstract: Systems and methods are disclosed for filtering metadata to be used in display management. Given an input video stream and input metadata comprising at least one of minimum, average, or maximum luminance values of the video frames in the video stream, values of a function of the input metadata are filtered using a temporal filter to generate filtered metadata, wherein the filtering is based only on metadata for input frames in the same scene. Methods for temporal filtering based on an exponential moving average filter or a look-ahead sliding window filter are presented, including methods for scene-change detection using the input metadata.
    Type: Application
    Filed: May 11, 2016
    Publication date: May 24, 2018
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Robin ATKINS, Gregory John WARD, Samir N. HULYALKAR, Guan-Ming SU, Sheng QU
  • Publication number: 20180082429
    Abstract: Motion characteristics related to the images are determined. A motion characteristics metadata portion is generated based on the motion characteristics, and is to be used for determining an optimal FRC operational mode with a downstream device for the images. The images are encoded into a video stream. The motion characteristics metadata portion is encoded into the video stream as a part of image metadata. The video stream is transmitted to the downstream device. The downstream receives the video stream and operates the optimal FRC operational mode to generate, based on the images, additional images. The images and the additional images are rendered on a display device at an image refresh rate different from an input image refresh rate represented by images encoded in the video stream.
    Type: Application
    Filed: September 13, 2017
    Publication date: March 22, 2018
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Anustup Kumar Atanu Choudhury, Tao Chen, Robin Atkins, Samir N. Hulyalkar
  • Patent number: 9924171
    Abstract: Techniques use multiple lower bit depth (e.g., 8 bits) codecs to provide higher bit depth (e.g., 12+ bits) high dynamic range images from an upstream device to a downstream device. Multiple layers comprising a base layer and one or more enhancement layers may be used to carry video signals comprising image data compressed by lower bit depth encoders to a downstream device, wherein the base layer cannot be decoded and viewed on its own. Lower bit depth input image data to base layer processing may be generated from higher bit depth high dynamic range input image data via advanced quantization to minimize the volume of image data to be carried by enhancement layer video signals. The image data in the enhancement layer video signals may comprise residual values, quantization parameters, and mapping parameters based in part on a prediction method corresponding to a specific method used in the advanced quantization.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: March 20, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Guan-Ming Su, Sheng Qu, Samir N. Hulyalkar, Tao Chen, Walter C. Gish, Hubert Koepfer
  • Patent number: 9906765
    Abstract: In an embodiment, a source video signal comprising reference code values and mapping function parameters for one or more mapping functions to map the reference code values to device-specific pixel values. The reference code values and the mapping function parameters are combined into first video frames in a first video signal format. The mapping function parameters represent DM metadata carried in the first video frames. Second video frames in a second video signal format are generated based on the first video frames in the first video signal format and a mapping between the first video signal format and the second video signal format. The second video frames are sent to a video sink device through the video link in an encoded video signal of the second video signal format.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: February 27, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Sheng Qu, Samir N. Hulyalkar
  • Publication number: 20170295382
    Abstract: A processor for video coding receives a full-frame rate (FFR) HDR video signal and a corresponding FFR SDR video signal. An encoder generates a scalable bitstream that allows decoders to generate half-frame-rate (HFR) SDR, FFR SDR, HFR HDR, or FFR HDR signals. Given odd and even frames of the input FFR SDR signal, the scalable bitstream combines a base layer of coded even SDR frames with an enhancement layer of coded packed frames, where each packed frame includes a downscaled odd SDR frame, a downscaled even HDR residual frame, and a downscaled odd HDR residual frame. In an alternative implementation, the scalable bitstream combines four signals layers: a base layer of even SDR frames, an enhancement layer of odd SDR frames, a base layer of even HDR residual frames and an enhancement layer of odd HDR residual frames. Corresponding decoder architectures are also presented.
    Type: Application
    Filed: April 6, 2017
    Publication date: October 12, 2017
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Guan-Ming SU, Qian CHEN, Tao CHEN, David BROOKS, Samir N. HULYALKAR, Peng YIN
  • Patent number: 9781417
    Abstract: HDR images are coded and distributed. An initial HDR image is received. Processing the received HDR image creates a JPEG-2000 DCI-compliant coded baseline image and an HDR-enhancement image. The coded baseline image has one or more color components, each of which provide enhancement information that allows reconstruction of an instance of the initial HDR image using the baseline image and the HDR-enhancement images. A data packet is computed, which has a first and a second data set. The first data set relates to the baseline image color components, each of which has an application marker that relates to the HDR-enhancement images. The second data set relates to the HDR-enhancement image. The data packets are sent in a DCI-compliant bit stream.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: October 3, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Ajit Ninan, Samir N. Hulyalkar
  • Publication number: 20170264861
    Abstract: Methods and systems for controlling judder are disclosed. Judder can be introduced locally within a picture, to restore a judder feeling which is normally expected in films. Judder metadata can be generated based on the input frames. The judder metadata includes base frame rate, judder control rate and display parameters, and can be used to control judder for different applications.
    Type: Application
    Filed: September 29, 2015
    Publication date: September 14, 2017
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Ning XU, James E. CRENSHAW, Scott DALY, Samir N. HULYALKAR, Raymond YEUNG
  • Patent number: 9679366
    Abstract: Novel methods and systems for color grading are disclosed. The color grading process for a visual dynamic range image can be guided by information relating to the color grading of other images such as the standard dynamic range image.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: June 13, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Ning Xu, Tao Chen, James E. Crenshaw, Samir N. Hulyalkar
  • Publication number: 20170124983
    Abstract: Methods are disclosed for adaptive display management using look-up table interpolation. Given a target maximum brightness value for a display, a new look-up table (LUT) for color gamut mapping is determined based on interpolating values from two other pre-computed color gamut LUTs; one computed for a first maximum display brightness larger than the target maximum brightness value, and one computed for a second maximum display brightness lower than the target brightness value. An interpolation scale is computed based at least on the target maximum brightness value and the first maximum display brightness. Methods to reduce the computation load for the translation of RGB data from one color representation (say, ST 2084) to another color representation (say, BT 1866) using fast interpolation methods are also presented.
    Type: Application
    Filed: November 2, 2016
    Publication date: May 4, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Robin Atkins, Samir N. Hulyalkar
  • Patent number: 9613407
    Abstract: A display management processor receives an input image with enhanced dynamic range to be displayed on a target display which has a different dynamic range than a reference display. The input image is first transformed into a perceptually-quantized (PQ) color space. A non-linear mapping function generates a tone-mapped intensity image in response to the characteristics of the source and target display and a measure of the intensity of the PQ image. After a detail-preservation step which may generate a filtered tone-mapped intensity image, an image-adaptive intensity and saturation adjustment step generates an intensity adjustment factor and a saturation adjustment factor as functions of the measure of intensity and saturation of the PQ image, which together with the filtered tone-mapped intensity image are used to generate the output image. Examples of the functions to compute the intensity and saturation adjustment factors are provided.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: April 4, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Robin Atkins, Samir N. Hulyalkar
  • Publication number: 20170019670
    Abstract: Techniques use multiple lower bit depth (e.g., 8 bits) codecs to provide higher bit depth (e.g., 12+ bits) high dynamic range images from an upstream device to a downstream device. Multiple layers comprising a base layer and one or more enhancement layers may be used to carry video signals comprising image data compressed by lower bit depth encoders to a downstream device, wherein the base layer cannot be decoded and viewed on its own. Lower bit depth input image data to base layer processing may be generated from higher bit depth high dynamic range input image data via advanced quantization to minimize the volume of image data to be carried by enhancement layer video signals. The image data in the enhancement layer video signals may comprise residual values, quantization parameters, and mapping parameters based in part on a prediction method corresponding to a specific method used in the advanced quantization.
    Type: Application
    Filed: September 29, 2016
    Publication date: January 19, 2017
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Guan-Ming SU, Sheng QU, Samir N. HULYALKAR, Tao CHEN, Walter C. GISH, Hubert KOEPFER
  • Patent number: 9497456
    Abstract: Techniques use multiple lower bit depth codecs to provide higher bit depth, high dynamic range, images from an upstream device to a downstream device. A base layer and one or more enhancement layers may be used to carry video signals, wherein the base layer cannot be decoded and viewed on its own. Lower bit depth input image data to base layer processing may be generated from higher bit depth high dynamic range input image data via advanced quantization to minimize the volume of image data to be carried by enhancement layer video signals. The image data in the enhancement layer video signals may comprise residual values, quantization parameters, and mapping parameters based in part on a prediction method corresponding to a specific method used in the advanced quantization. Adaptive dynamic range adaptation techniques take into consideration special transition effects, such as fade-in and fade-outs, for improved coding performance.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: November 15, 2016
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Guan-Ming Su, Sheng Qu, Samir N. Hulyalkar, Tao Chen, Walter C. Gish, Hubert Koepfer