Patents by Inventor Peshala Pahalawatta

Peshala Pahalawatta 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: 20230188764
    Abstract: A processing system may identify at least one feature set of a first video program, the at least one feature set including a complexity factor, obtain predicted visual qualities for candidate bitrate and resolution combinations of the first video program by applying the at least one feature set to a prediction model that is trained to output the predicted visual qualities for the candidate bitrate and resolution combinations of the first video program in accordance with the at least one feature set, select a bitrate and resolution combination for at least one variant of the first video program in accordance with the predicted visual qualities for the candidate bitrate and resolution combinations of the first video program, and transcode the at least one variant of the first video program in accordance with the bitrate and resolution combination that is selected for the at least one variant.
    Type: Application
    Filed: December 15, 2021
    Publication date: June 15, 2023
    Inventors: Peshala Pahalawatta, Lucian Jiang-Wei, Sudesh Chandel
  • Publication number: 20230073734
    Abstract: In one example, the present disclosure describes a device, computer-readable medium, and method for image format conversion using luminance-adaptive dithering. For instance, in one example, a method includes acquiring an image in a first format, wherein the first format is associated with a first electro-optical transfer function, identifying a second format to which to convert the image, wherein the second format is associated with a second electro-optical transfer function, and applying dithering to the image in the second format, based on an evaluation of a luminance-dependent metric against a predefined threshold, wherein the luminance-dependent metric is computed from at least one of the first electro-optical transfer function and the second electro-optical transfer function.
    Type: Application
    Filed: November 14, 2022
    Publication date: March 9, 2023
    Inventor: Peshala Pahalawatta
  • Patent number: 11501686
    Abstract: In one example, the present disclosure describes a device, computer-readable medium, and method for image format conversion using luminance-adaptive dithering. For instance, in one example, a method includes acquiring an image in a first format, wherein the first format is associated with a first electro-optical transfer function, identifying a second format to which to convert the image, wherein the second format is associated with a second electro-optical transfer function, and applying dithering to the image in the second format, based on an evaluation of a luminance-dependent metric against a predefined threshold, wherein the luminance-dependent metric is computed from at least one of the first electro-optical transfer function and the second electro-optical transfer function.
    Type: Grant
    Filed: November 9, 2020
    Date of Patent: November 15, 2022
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Peshala Pahalawatta
  • Publication number: 20210352341
    Abstract: An example method performed by a processing system includes detecting a first scene cut in a source video that is provided as an input to a video distribution system. The video distribution system includes a plurality of processing stages for transforming the source video into a processed video that is suitable for distribution to viewers. The first scene cut is detected in the processed video that is output by the video distribution system. The processed video is a version of the source video that has been altered according to at least one of the plurality of processing stages. A first sub-segment of the source video is time-aligned with a second sub-segment of the processed video, using the first scene cut as a reference point for performing the time-aligning. A difference is computed between a picture quality metric of the first sub-segment and a picture quality metric of the second sub-segment.
    Type: Application
    Filed: May 6, 2020
    Publication date: November 11, 2021
    Inventors: Peshala Pahalawatta, Roberto Nery da Fonseca, Manuel A. Briand
  • Publication number: 20210056886
    Abstract: In one example, the present disclosure describes a device, computer-readable medium, and method for image format conversion using luminance-adaptive dithering. For instance, in one example, a method includes acquiring an image in a first format, wherein the first format is associated with a first electro-optical transfer function, identifying a second format to which to convert the image, wherein the second format is associated with a second electro-optical transfer function, and applying dithering to the image in the second format, based on an evaluation of a luminance-dependent metric against a predefined threshold, wherein the luminance-dependent metric is computed from at least one of the first electro-optical transfer function and the second electro-optical transfer function.
    Type: Application
    Filed: November 9, 2020
    Publication date: February 25, 2021
    Inventor: Peshala Pahalawatta
  • Patent number: 10832613
    Abstract: In one example, the present disclosure describes a device, computer-readable medium, and method for image format conversion using luminance-adaptive dithering. For instance, in one example, a method includes acquiring an image in a first format, wherein the first format is associated with a first electro-optical transfer function, identifying a second format to which to convert the image, wherein the second format is associated with a second electro-optical transfer function, and applying dithering to the image in the second format, based on an evaluation of a luminance-dependent metric against a predefined threshold, wherein the luminance-dependent metric is computed from at least one of the first electro-optical transfer function and the second electro-optical transfer function.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: November 10, 2020
    Assignee: AT&T Intellectual Property I, L.P.
    Inventor: Peshala Pahalawatta
  • Patent number: 10779014
    Abstract: Aspects of the subject disclosure may include, for example, a method including obtaining media content and a ranking for each tile of the media content based on a plurality of viewports; receiving a request from user equipment to view the media content; obtaining, iteratively, a plurality for predicted fields of view of the user, the predicted fields of view each covering different future time periods; identifying viewports corresponding to the predicted fields of view; sending any remaining tiles corresponding to the closest in time predicted field of view to the user equipment; and sending remaining tiles corresponding to successive predicted fields of view to the user equipment the ranking based and an excess bandwidth. Other embodiments are disclosed.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: September 15, 2020
    Assignees: AT&T Intellectual Property I, L.P., The Trustees of Indiana University
    Inventors: Bo Han, Peshala Pahalawatta, Vijay Gopalakrishnan, Feng Qian
  • Publication number: 20200128280
    Abstract: Aspects of the subject disclosure may include, for example, a method including obtaining media content and a ranking for each tile of the media content based on a plurality of viewports; receiving a request from user equipment to view the media content; obtaining, iteratively, a plurality for predicted fields of view of the user, the predicted fields of view each covering different future time periods; identifying viewports corresponding to the predicted fields of view; sending any remaining tiles corresponding to the closest in time predicted field of view to the user equipment; and sending remaining tiles corresponding to successive predicted fields of view to the user equipment the ranking based and an excess bandwidth. Other embodiments are disclosed.
    Type: Application
    Filed: October 18, 2018
    Publication date: April 23, 2020
    Applicants: AT&T Intellectual Property I, L.P., The Trustees of Indiana University
    Inventors: Bo Han, Peshala Pahalawatta, Vijay Gopalakrishnan, Feng Qian
  • Publication number: 20190279554
    Abstract: In one example, the present disclosure describes a device, computer-readable medium, and method for image format conversion using luminance-adaptive dithering. For instance, in one example, a method includes acquiring an image in a first format, wherein the first format is associated with a first electro-optical transfer function, identifying a second format to which to convert the image, wherein the second format is associated with a second electro-optical transfer function, and applying dithering to the image in the second format, based on an evaluation of a luminance-dependent metric against a predefined threshold, wherein the luminance-dependent metric is computed from at least one of the first electro-optical transfer function and the second electro-optical transfer function.
    Type: Application
    Filed: March 7, 2018
    Publication date: September 12, 2019
    Inventor: Peshala Pahalawatta
  • Patent number: 9961357
    Abstract: A video base layer can contain information pertaining to frame-compatible interlace representations of multiple data categories while video enhancement layers can contain interlace or progressive representations and/or frame-compatible representations of these data categories. Video data are encoded and decoded using layered approaches.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: May 1, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Athanasios Leontaris, Alexandros Tourapis, Peshala Pahalawatta, Kevin J. Stec, Walter J. Husak
  • Publication number: 20150201206
    Abstract: A video base layer can contain information pertaining to frame-compatible interlace representations of multiple data categories while video enhancement layers can contain interlace or progressive representations and/or frame-compatible representations of these data categories. Video data are encoded and decoded using layered approaches.
    Type: Application
    Filed: March 25, 2015
    Publication date: July 16, 2015
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Athanasios LEONTARIS, Alexandros TOURAPIS, Peshala PAHALAWATTA, Kevin J. STEC, Walter J. HUSAK
  • Patent number: 9055278
    Abstract: Conversion of interleaved data and/or correction of color samples or other data are corrected by recognizing an underlying arrangement or format of different data sets within a data stream and a conversion process applied that causes bleeding between the sets The data sets are, for example, separate channel views of a 3D display, and the corruption occurs, for example, upon up-conversion of color samples that take into account both views together rather than individually. The invention is embodied, for example, as part of a playback device, display, or as a stand alone converter box that corrects the corrupted samples by at least one of substitution, filtering, or interpolation with appropriately selected samples (e.g., neighboring samples of a same view). In one embodiment, the invention comprises a conversion from a received format (e.g., checkerboard) to a delivery format (e.g., native format of a 3D ready display).
    Type: Grant
    Filed: January 6, 2010
    Date of Patent: June 9, 2015
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Alexandros Tourapis, Peshala Pahalawatta
  • Patent number: 9014263
    Abstract: A video base layer can contain information pertaining to frame-compatible interlace representations of multiple data categories while video enhancement layers can contain interlace or progressive representations and/or frame-compatible representations of these data categories. Video data are encoded and decoded using layered approaches.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: April 21, 2015
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Athanasios Leontaris, Alexandros Tourapis, Peshala Pahalawatta, Kevin J. Stec, Walter J. Husak
  • Publication number: 20140321540
    Abstract: A video base layer can contain information pertaining to frame-compatible interlace representations of multiple data categories while video enhancement layers can contain interlace or progressive representations and/or frame-compatible representations of these data categories. Video data are encoded and decoded using layered approaches.
    Type: Application
    Filed: December 17, 2012
    Publication date: October 30, 2014
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Athanasios Leontaris, Alexandros Tourapis, Peshala Pahalawatta, Kevin J. Stec, Walter J. Husak
  • Publication number: 20100171817
    Abstract: Conversion of interleaved data and/or correction of color samples or other data are corrected by recognizing an underlying arrangement or format of different data sets within a data stream and a conversion process applied that causes bleeding between the sets The data sets are, for example, separate channel views of a 3D display, and the corruption occurs, for example, upon up-conversion of color samples that take into account both views together rather than individually. The invention is embodied, for example, as part of a playback device, display, or as a stand alone converter box that corrects the corrupted samples by at least one of substitution, filtering, or interpolation with appropriately selected samples (e.g., neighboring samples of a same view). In one embodiment, the invention comprises a conversion from a received format (e.g., checkerboard) to a delivery format (e.g., native format of a 3D ready display).
    Type: Application
    Filed: January 6, 2010
    Publication date: July 8, 2010
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventors: Alexandros Tourapis, Peshala Pahalawatta