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    Motion estimation for screen remoting scenarios
    1.
    发明授权
    Motion estimation for screen remoting scenarios 有权

    公开(公告)号：US10390039B2

    公开(公告)日：2019-08-20

    申请号：US15253568

    申请日：2016-08-31

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Lihua Zhu ,  B. Anil Kumar ,  Olof L. E. Mases

    IPC: H04N7/12 ,  H04N19/54

    Abstract: Innovations in motion estimation adapted for screen remoting scenarios are described herein. For example, as part of motion estimation for a current picture, a video encoder finds a pivot point in the current picture, calculates a hash value for the pivot point, and searches for a matching area in a previous picture. In doing so, the video encoder can calculate a hash index from the hash value and look up the hash index in a data structure to find candidate pivot points in the previous picture. The video encoder can compare the hash value for the pivot point in the current picture to a hash value for a candidate pivot point in the previous picture and, when the hash values match, compare sample values around the respective pivot points. In this way, the video encoder can quickly detect large areas of exact-match blocks having uniform motion.

    Efficient decoding and rendering of inter-coded blocks in a graphics pipeline
    2.
    发明授权
    Efficient decoding and rendering of inter-coded blocks in a graphics pipeline 有权

    公开(公告)号：US10157480B2

    公开(公告)日：2018-12-18

    申请号：US15192827

    申请日：2016-06-24

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Lihua Zhu ,  B. Anil Kumar ,  Guosheng Sun ,  Olof L. E. Mases

    IPC: G06T9/00 ,  H04N19/433 ,  H04N19/587 ,  H04N19/513 ,  H04N19/436 ,  H04N19/42 ,  G06T15/80 ,  G06T15/04

    Abstract: Innovations in video decoding and rendering operations for inter-coded blocks in a graphics pipeline, in which at least some of the operations are performed using a graphics processing unit (“GPU”), are described. For example, a video playback tool receives encoded data for a current picture and performs operations to decode the encoded data and reconstruct the current picture. For a given inter-coded block of the current picture, a graphics primitive represents texture values as a point for processing by the GPU. The graphics primitive can have one or more attributes, including a motion vector, a block size, a display index value (indicating a location in a display buffer), and/or a residual index value (indicating a location of residual values). The operations performed by the video playback tool can include interpolation of sample values at fractional-sample offsets and motion compensation performed for inter-coded blocks in multiple passes for different block sizes.

    Browser-based video decoder using multiple CPU threads
    4.
    发明授权
    Browser-based video decoder using multiple CPU threads 有权

    公开(公告)号：US11197010B2

    公开(公告)日：2021-12-07

    申请号：US15289111

    申请日：2016-10-07

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Jingyaw Sun ,  Winston M. P. Johnston ,  Jayashree Sadagopan ,  Lihua Zhu ,  Michael E. Seydl ,  Olof L. E. Mases ,  B. Anil Kumar

    IPC: H04N19/44 ,  H04N19/127 ,  H04N19/42 ,  H04N19/436 ,  H04N19/124 ,  H04N19/51 ,  H04N19/60 ,  G06T1/20

    Abstract: Innovations in video playback using a browser-based video decoder are described. In a computer system that includes multiple central processing units (“CPUs”), a browser-based video decoder performs operations with multiple threads that may execute simultaneously on different CPUs. The video decoder can perform decoding operations in parallel for different sections of a picture. For example, with a main CPU thread associated with a browser, the video decoder performs a first decoding workload (e.g., bitstream parsing) for a picture. With auxiliary CPU threads associated with Web workers and simultaneously executing on different CPUs, the video decoder performs a second decoding workload (e.g., entropy decoding, decoding of side information) for different sections of the picture, one section per auxiliary CPU thread. If the computer system also includes a graphics processing unit (“GPU”), the video decoder can perform additional decoding workloads with shader routines executable on the GPU.

    Efficient decoding and rendering of blocks in a graphics pipeline
    5.
    发明授权
    Efficient decoding and rendering of blocks in a graphics pipeline 有权

    公开(公告)号：US10575007B2

    公开(公告)日：2020-02-25

    申请号：US15097143

    申请日：2016-04-12

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Guosheng Sun ,  Olof L. E. Mases ,  Lihua Zhu ,  B. Anil Kumar

    IPC: H04N7/12 ,  H04N19/44 ,  G06T15/04 ,  G06T15/00 ,  H04N19/436

    Abstract: Innovations in video decoding and rendering operations in a graphics pipeline, in which at least some of the operations are performed using a graphics processing unit (“GPU”), are described. For example, a video playback tool aggregates texture values for intra-coded blocks of a picture in central processing unit (“CPU”) memory, then transfers the texture values for the intra-coded blocks from the CPU memory to GPU memory. The video playback tool performs operations to decode the encoded data and reconstruct the picture. For a given block (e.g., of a macroblock, coding unit) of the picture, a graphics primitive represents texture values for the given block as a point for processing by the GPU. The video playback tool uses one or more shader routines, executable by the GPU, to transfer texture values to a display buffer. In some cases, the video playback tool also performs decoding operations with the shader routines.

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