Patents by Inventor Peshala V. Pahalawatta
Peshala V. 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).
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Publication number: 20170347125Abstract: An encoding device evaluates a plurality of processing and/or post-processing algorithms and/or methods to be applied to a video stream, and signals a selected method, algorithm, class or category of methods/algorithms either in an encoded bitstream or as side information related to the encoded bitstream. A decoding device or post-processor utilizes the signaled algorithm or selects an algorithm/method based on the signaled method or algorithm. The selection is based, for example, on availability of the algorithm/method at the decoder/post-processor and/or cost of implementation. The video stream may comprise, for example, downsampled multiplexed stereoscopic images and the selected algorithm may include any of upconversion and/or error correction techniques that contribute to a restoration of the downsampled images.Type: ApplicationFiled: August 16, 2017Publication date: November 30, 2017Applicant: Dolby Laboratories Licensing CorporationInventors: Alexandros TOURAPIS, Athanasios LEONTARIS, Peshala V. PAHALAWATTA, Kevin J. STEC
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Publication number: 20170339429Abstract: Encoding and decoding architectures for 3D video delivery are described, such as 2D compatible 3D video delivery and frame compatible 3D video delivery. The architectures include pre-processing stages to pre-process the output of a base layer video encoder and/or decoder and input the pre-processed output into an enhancement layer video encoder and/or decoder of one or more enhancement layers. Multiplexing methods of how to combine the base and enhancement layer videos are also described.Type: ApplicationFiled: August 11, 2017Publication date: November 23, 2017Applicant: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Alexandros TOURAPIS, Peshala V. PAHALAWATTA, Athanasios LEONTARIS, Kevin J. STEC, Walter J. HUSAK
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Patent number: 9774882Abstract: Encoding and decoding architectures for 3D video delivery are described, such as 2D compatible 3D video delivery and frame compatible 3D video delivery. The architectures include pre-processing stages to pre-process the output of a base layer video encoder and/or decoder and input the pre-processed output into an enhancement layer video encoder and/or decoder of one or more enhancement layers. Multiplexing methods of how to combine the base and enhancement layer videos are also described.Type: GrantFiled: June 30, 2010Date of Patent: September 26, 2017Assignee: Dolby Laboratories Licensing CorporationInventors: Alexandros Tourapis, Peshala V. Pahalawatta, Athanasios Leontaris, Kevin J. Stec, Walter J. Husak
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Patent number: 9729899Abstract: An encoding device evaluates a plurality of processing and/or post-processing algorithms and/or methods to be applied to a video stream, and signals a selected method, algorithm, class or category of methods/algorithms either in an encoded bitstream or as side information related to the encoded bitstream. A decoding device or post-processor utilizes the signaled algorithm or selects an algorithm/method based on the signaled method or algorithm. The selection is based, for example, on availability of the algorithm/method at the decoder/post-processor and/or cost of implementation. The video stream may comprise, for example, downsampled multiplexed stereoscopic images and the selected algorithm may include any of upconversion and/or error correction techniques that contribute to a restoration of the downsampled images.Type: GrantFiled: April 20, 2010Date of Patent: August 8, 2017Assignee: Dolby Laboratories Licensing CorporationInventors: Alexandros Tourapis, Athanasios Leontaris, Peshala V. Pahalawatta, Kevin J. Stec
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Publication number: 20170013277Abstract: The present disclosure describes a system and method for multi-layered image and video delivery using reference processing signal. A multi-layered encoder and a multi-layered decoder, both comprising at least one enhancement layer processor that uses reference processing and a base layer processor are provided. A multi-layered encoder and a multi-layered decoder that use reference processing and are capable of frame-compatible 3D video delivery are also described.Type: ApplicationFiled: July 15, 2016Publication date: January 12, 2017Inventors: Peshala V. PAHALAWATTA, Alexandros TOURAPIS, Walter J. HUSAK
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Publication number: 20160381343Abstract: Multi-layered frame-compatible video delivery is described. Multi-layered encoding and decoding methods, comprising a base layer and at least one enhancement layer with reference processing, are provided. In addition, multi-layered encoding and decoding methods with inter-layer dependencies are described. Encoding and decoding methods that are capable of frame-compatible 3D video delivery are also described.Type: ApplicationFiled: September 7, 2016Publication date: December 29, 2016Applicant: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Athanasios LEONTARIS, Alexandros TOURAPIS, Peshala V. PAHALAWATTA, Kevin STEC, Walter HUSAK
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Patent number: 9521413Abstract: Reference processing may be used in a video encoder or decoder to derive reference pictures that are better correlated with a source image to be encoded or decoded, which generally yields better coding efficiency. Methods for filter selection for a reference processing unit adapted for use in a video codec system are discussed. Specifically, methods for filter selection based on performing motion estimation and obtaining distortion/cost information by comparing reference pictures, either processed or non-processed, with the source image to be encoded are discussed.Type: GrantFiled: January 22, 2016Date of Patent: December 13, 2016Assignee: Dolby Laboratories Licensing CorporationInventors: Peshala V. Pahalawatta, Yuwen He, Alexandros Tourapis
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Patent number: 9503757Abstract: Filtering lower quality images or sequences of images with higher quality images or sequences of images. The filtering is utilized in a post-process, decoded, or encoded images including multiple sets of images that are filtered and/or combined. Different image features including, for example, quality, frequency characteristics, temporal resolution, spatial resolution, number of views, or bit-depth are present in the images. In one embodiment, the filtering comprises a multi-hypothesis filtering and the confidence value comprises a difference between the filtered sample and samples lying within a filter support. The post processes images are then stored or distributed.Type: GrantFiled: January 7, 2011Date of Patent: November 22, 2016Assignee: Dolby Laboratories Licensing CorporationInventors: Peshala V. Pahalawatta, Alexandros Tourapis, Athanasios Leontaris
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Patent number: 9479772Abstract: Multi-layered frame-compatible video delivery is described. Multi-layered encoding and decoding methods, comprising a base layer and at least one enhancement layer with reference processing, are provided. In addition, multi-layered encoding and decoding methods with inter-layer dependencies are described. Encoding and decoding methods that are capable of frame-compatible 3D video delivery are also described.Type: GrantFiled: December 30, 2013Date of Patent: October 25, 2016Assignee: Dolby Laboratories Licensing CorporationInventors: Athanasios Leontaris, Alexandros Tourapis, Peshala V. Pahalawatta, Kevin Stec, Walter Husak
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Patent number: 9467690Abstract: Adaptive decoding and streaming multi-layer video systems and methods are described. The decoding systems comprise a base layer decoder and one or more enhancement layer decoders. The streaming systems comprise a base layer packetizer and one or more enhancement layer packetizers. A decoding adaptor controls operation of the base layer and/or enhancement layer decoders. A packetizing adaptor controls operation of the base layer and/or enhancement layer packetizers.Type: GrantFiled: January 3, 2011Date of Patent: October 11, 2016Assignee: Dolby Laboratories Licensing CorporationInventors: Yuwen He, Alexandros Tourapis, Peshala V. Pahalawatta, Athanasios Leontaris
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Patent number: 9467689Abstract: The present disclosure describes a system and method for multi-layered image and video delivery using reference processing signal. A multi-layered encoder and a multi-layered decoder, both comprising at least one enhancement layer processor that uses reference processing and a base layer processor are provided. A multi-layered encoder and a multi-layered decoder that use reference processing and are capable of frame-compatible 3D video delivery are also described.Type: GrantFiled: July 6, 2011Date of Patent: October 11, 2016Assignee: Dolby Laboratories Licensing CorporationInventors: Peshala V. Pahalawatta, Alexandros Tourapis, Walter J. Husak
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Publication number: 20160285940Abstract: A method for adaptive streaming of video data over a network is disclosed. The method includes receiving, by one or more decoders of a video streaming client, first video information of a video data stream with one or more operations of first complexity. The method further includes obtaining client-related information based at least in part on a decoding capability of the video streaming client related to decoding the first video information with the one or more operations of the first complexity by the one or more decoders. The method also includes using, by the video streaming client, the client-related information to cause the video streaming from the video streaming server to the video streaming client to be adapted to a different overall bit rate and based at least in part on the client-related information.Type: ApplicationFiled: June 10, 2016Publication date: September 29, 2016Applicant: Dolby Laboratories Licensing CorporationInventors: Yuwen HE, Alexandros TOURAPIS, Peshala V. PAHALAWATTA, Athanasios LEONTARIS
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Patent number: 9438881Abstract: Enhancement methods for sampled and multiplexed image and video data are described. Each component picture is separately processed either after de-multiplexing or on the fly. Processing and de-multiplexing can be combined in a single joint step. The methods apply to both encoding and decoding system and include applications to scalable video coding systems.Type: GrantFiled: July 19, 2011Date of Patent: September 6, 2016Assignee: Dolby Laboratories Licensing CorporationInventors: Athanasios Leontaris, Alexandros Tourapis, Peshala V. Pahalawatta
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Patent number: 9420311Abstract: Sampled data is packaged in checkerboard format for encoding and decoding. The sampled data may be quincunx sampled multi-image video data (e.g., 3D video or a multi-program stream), and the data may also be divided into sub-images of each image which are then multiplexed, or interleaved, in frames of a video stream to be encoded and then decoded using a standardized video encoder. A system for viewing may utilize a standard video decoder and a formatting device that de-interleaves the decoded sub-images of each frame reformats the images for a display device. A 3D video may be encoded using a most advantageous interleaving format such that a preferred quality and compression ratio is reached. In one embodiment, the invention includes a display device that accepts data in multiple formats.Type: GrantFiled: July 2, 2015Date of Patent: August 16, 2016Assignee: Dolby Laboratories Licensing CorporationInventors: Alexandros Tourapis, Walter J. Husak, Peshala V. Pahalawatta, Athanasios Leontaris
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Publication number: 20160142709Abstract: Reference processing may be used in a video encoder or decoder to derive reference pictures that are better correlated with a source image to be encoded or decoded, which generally yields better coding efficiency. Methods for filter selection for a reference processing unit adapted for use in a video codec system are discussed. Specifically, methods for filter selection based on performing motion estimation and obtaining distortion/cost information by comparing reference pictures, either processed or non-processed, with the source image to be encoded are discussed.Type: ApplicationFiled: January 22, 2016Publication date: May 19, 2016Applicant: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Peshala V. PAHALAWATTA, Yuwen HE, Alexandros TOURAPIS
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Publication number: 20160094859Abstract: An encoding device evaluates a plurality of processing and/or post-processing algorithms and/or methods to be applied to a video stream, and signals a selected method, algorithm, class or category of methods/algorithms either in an encoded bitstream or as side information related to the encoded bitstream. A decoding device or post-processor utilizes the signaled algorithm or selects an algorithm/method based on the signaled method or algorithm. The selection is based, for example, on availability of the algorithm/method at the decoder/post-processor and/or cost of implementation. The video stream may comprise, for example, downsampled multiplexed stereoscopic images and the selected algorithm may include any of upconversion and/or error correction techniques that contribute to a restoration of the downsampled images.Type: ApplicationFiled: November 30, 2015Publication date: March 31, 2016Applicant: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Alexandros TOURAPIS, Athanasios LEONTARIS, Peshala V. PAHALAWATTA, Kevin J. STEC
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Publication number: 20160080772Abstract: A device includes a coder or a codec configured for interleaved image data utilizing diamond shaped blocks for motion estimation and/or motion compensation and utilizing square or orthogonal transforms of residual data. In various embodiments, the decoder may be configured, among others, to perform de-blocking on edges of the diamond shaped blocks and/or data padding at boundaries of the image data.Type: ApplicationFiled: November 24, 2015Publication date: March 17, 2016Applicant: Dolby Laboratories Licensing CorporationInventors: Alexandros Tourapis, Athanasios Leontaris, Peshala V. Pahalawatta
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Patent number: 9270871Abstract: Reference processing may be used in a video encoder or decoder to derive reference pictures that are better correlated with a source image to be encoded or decoded, which generally yields better coding efficiency. Methods for filter selection for a reference processing unit adapted for use in a video codec system are discussed. Specifically, methods for filter selection based on performing motion estimation and obtaining distortion/cost information by comparing reference pictures, either processed or non-processed, with the source image to be encoded are discussed.Type: GrantFiled: September 19, 2011Date of Patent: February 23, 2016Assignee: Dolby Laboratories Licensing CorporationInventors: Peshala V. Pahalawatta, Yuwen He, Alexandros Tourapis
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Patent number: 9264690Abstract: 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).Type: GrantFiled: September 3, 2009Date of Patent: February 16, 2016Assignee: Dolby Laboratories Licensing CorporationInventors: Peshala V. Pahalawatta, Alexandros Tourapis
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Patent number: 9237327Abstract: A device includes a coder or a codec configured for interleaved image data utilizing diamond shaped blocks for motion estimation and/or motion compensation and utilizing square or orthogonal transforms of residual data. In various embodiments, the decoder may be configured, among others, to perform de-blocking on edges of the diamond shaped blocks and/or data padding at boundaries of the image data. Additionally a method is proposed in which at least one of a transform and quantization process to be applied to de-multiplexed data is modified. One application is to combine left and right stereoscopic images, interleaved in a checkerboard manner.Type: GrantFiled: September 15, 2009Date of Patent: January 12, 2016Assignee: Dolby Laboratories Licensing CorporationInventors: Alexandros Tourapis, Athanasios Leontaris, Peshala V. Pahalawatta