中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

160 records (took 0.039 seconds)

    Robust encoding/decoding of escape-coded pixels in palette mode
    51.
    发明授权
    Robust encoding/decoding of escape-coded pixels in palette mode 有权

    公开(公告)号：US10659783B2

    公开(公告)日：2020-05-19

    申请号：US15735134

    申请日：2015-06-09

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Bin Li ,  Jizheng Xu

    IPC: H04N19/103 ,  H04N19/134 ,  H04N19/124 ,  H04N19/593 ,  H04N19/157 ,  H04N19/182 ,  H04N19/13 ,  H04N19/91 ,  H04N19/70 ,  H04N19/46 ,  H04N19/186 ,  H04N19/174

    Abstract: Approaches to robust encoding and decoding of escape-coded pixels in a palette mode are described. For example, sample values of escape-coded pixels in palette mode are encoded/decoded using a binarization process that depends on a constant value of quantization parameter (“QP”) for the sample values. Or, as another example, sample values of escape-coded pixels in palette mode are encoded/decoded using a binarization process that depends on sample depth for the sample values. Or, as still another example, sample values of escape-coded pixels in palette mode are encoded/decoding using a binarization process that depends on some other fixed rule. In example implementations, these approaches avoid dependencies on unit-level QP values when parsing the sample values of escape-coded pixels, which can make encoding/decoding more robust to data loss.

    FEATURES OF BASE COLOR INDEX MAP MODE FOR VIDEO AND IMAGE CODING AND DECODING
    52.
    发明申请
    FEATURES OF BASE COLOR INDEX MAP MODE FOR VIDEO AND IMAGE CODING AND DECODING 审中-公开

    公开(公告)号：US20200084472A1

    公开(公告)日：2020-03-12

    申请号：US16683065

    申请日：2019-11-13

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Bin Li ,  Feng Wu ,  Jizheng Xu

    IPC: H04N19/593 ,  H04N19/126 ,  H04N19/70

    Abstract: Innovations in the use of base color index map (“BCIM”) mode during encoding and/or decoding simplify implementation by reducing the number of modifications made to support BCIM mode and/or improve coding efficiency of BCIM mode. For example, some of the innovations involve reuse of a syntax structure that is adapted for transform coefficients to instead signal data for elements of an index map in BCIM mode. Other innovations relate to mapping of index values in BCIM mode or prediction of elements of an index map in BCIM mode. Still other innovations relate to handling of exception values in BCIM mode.

    Coded-block-flag coding and derivation
    54.
    发明授权
    Coded-block-flag coding and derivation 有权

    公开(公告)号：US10264271B2

    公开(公告)日：2019-04-16

    申请号：US15646361

    申请日：2017-07-11

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Bin Li ,  Jizheng Xu

    IPC: H04N19/18 ,  H04N19/96 ,  H04N19/132 ,  H04N19/463

    Abstract: Techniques for coding and deriving (e.g., determining) one or more coded-block-flags associated with video content are described herein. A coded-block-flag of a last node may be determined when coded-block-flags of preceding nodes are determined to be a particular value and when a predetermined condition is satisfied. In some instances, the predetermined condition may be satisfied when log2(size of current transform unit) is less than log2(size of maximum transform unit) or log2(size of current coding unit) is less than or equal to log2(size of maximum transform unit)+1. The preceding nodes may be nodes that precede the last node on a particular level in a residual tree.

    FLEXIBLE REFERENCE PICTURE MANAGEMENT FOR VIDEO ENCODING AND DECODING
    58.
    发明申请
    FLEXIBLE REFERENCE PICTURE MANAGEMENT FOR VIDEO ENCODING AND DECODING 审中-公开

    公开(公告)号：US20180302640A1

    公开(公告)日：2018-10-18

    申请号：US15767992

    申请日：2015-11-06

    Applicant: Bin LI ,  Jizheng XU ,  Microsoft Technology Licensing, LLC

    Inventor： Bin Li ,  Jizheng Xu

    IPC: H04N19/513 ,  H04N19/58 ,  H04N19/105 ,  H04N19/117 ,  H04N19/142 ,  H04N19/146 ,  H04N19/17 ,  H04N19/179 ,  H04N19/46 ,  H04N19/82

    Abstract: Innovations in flexible reference picture management are described. For example, a video encoder and video decoder use a global reference picture set (“GRPS”) of reference pictures that remain in memory, and hence are available for use in video encoding/decoding, longer than conventional reference pictures. In particular, reference pictures of the GRPS remain available across random access boundaries. Or, as another example, a video encoder and video decoder clip a reference picture so that useful regions of the reference picture are retained in memory, while unhelpful or redundant regions of the reference picture are discarded. Reference picture clipping can reduce the amount of memory needed to store reference pictures or improve the utilization of available memory by providing better options for motion compensation. Or, as still another example, a video encoder and video decoder filter a reference picture to remove random noise (e.g., capture noise due to camera imperfections during capture).

Patent Agency Ranking