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    Adaptive loop filter (ALF) index signaling
    62.
    发明授权
    Adaptive loop filter (ALF) index signaling 有权

    公开(公告)号：US11051017B2

    公开(公告)日：2021-06-29

    申请号：US16717530

    申请日：2019-12-17

    Applicant: QUALCOMM Incorporated

    Inventor： Nan Hu ,  Vadim Seregin ,  Marta Karczewicz

    IPC: H04N19/117 ,  H04N19/82 ,  H04N19/176 ,  H04N19/132 ,  H04N19/423 ,  H04N19/105

    Abstract: Techniques are described for performing adaptive loop filtering in video coding. A video coder is configured to determine available adaptive loop filter (ALF) sets and at least one of signal information indicative of a size of a list of ALF sets or receive information indicative of the size of the list of ALF sets. The video coder is configured to construct the list of ALF sets based on the indicated size of the list of ALF sets, determine an ALF set for the current block based on the constructed list of ALF sets, and perform adaptive loop filtering based on the determined ALF set.

    REFERENCE PICTURE SCALING RATIOS FOR REFERENCE PICTURE RESAMPLING IN VIDEO CODING
    64.
    发明申请
    REFERENCE PICTURE SCALING RATIOS FOR REFERENCE PICTURE RESAMPLING IN VIDEO CODING 有权

    公开(公告)号：US20210195172A1

    公开(公告)日：2021-06-24

    申请号：US17119758

    申请日：2020-12-11

    Applicant: QUALCOMM Incorporated

    Inventor： Yao-Jen Chang ,  Vadim Seregin ,  Muhammed Zeyd Coban

    IPC: H04N19/105 ,  H04N19/132 ,  H04N19/30 ,  H04N19/70 ,  H04N19/176

    Abstract: A video encoder and video decoder may be configured to disable subpicture processing in situations where reference picture scaling is enabled. In another example, when reference picture scaling is enabled, a video encoder may determine a reference picture scaling ratio for the reference picture resampling process based on a width of a scaling window (PicOutputWidthL) of the current picture and a height of the scaling window (PicOutputHeightL) of the current picture. The values of PicOutputWidthL and PicOutputHeightL are constrained, respectively, relative to a width of a scaling window (refPicOutputWidthL) of the reference picture and a height of the scaling window (refPicOutputHeightL) of the reference picture.

    GEOMETRIC PARTITION MODE WITH INCREASED EFFICIENCY
    65.
    发明申请
    GEOMETRIC PARTITION MODE WITH INCREASED EFFICIENCY 有权

    公开(公告)号：US20210152825A1

    公开(公告)日：2021-05-20

    申请号：US17078710

    申请日：2020-10-23

    Applicant: QUALCOMM Incorporated

    Inventor： Kevin Pascal Andre Reuze ,  Han Huang ,  Chun-Chi Chen ,  Po-Han Lin ,  Wei-Jung Chien ,  Vadim Seregin ,  Marta Karczewicz

    IPC: H04N19/119 ,  H04N19/167 ,  G06F1/03

    Abstract: An example device for decoding video data includes a memory configured to store the video data and one or more processors implemented in circuitry and coupled to the memory. The one or more processors are configured to determine a first distance index associated with a first geometric partition mode (GEO) angle for a first prediction unit (PU) of the video data to be 4. The one or more processors are configured to determine a first displacement value based on the first distance index, the first displacement value being indicative of a distance from a center of the first PU to a GEO split. The one or more processors are configured to decode the first PU based on the first GEO angle and the first displacement value. The first displacement value is half of a displacement value associated with a distance index of 2.

    Position-dependent prediction combinations in video coding
    66.
    发明授权
    Position-dependent prediction combinations in video coding 有权

    公开(公告)号：US10965941B2

    公开(公告)日：2021-03-30

    申请号：US16154261

    申请日：2018-10-08

    Applicant: QUALCOMM Incorporated

    Inventor： Xin Zhao ,  Vadim Seregin ,  Amir Said ,  Marta Karczewicz ,  Kai Zhang ,  Vijayaraghavan Thirumalai

    IPC: H04N7/12 ,  H04N19/11 ,  H04N19/117 ,  H04N19/176 ,  H04N19/105 ,  H04N19/593 ,  H04N19/167 ,  H04N19/182

    Abstract: A video coder may generate a predictor block using an intra prediction mode. As part of generating the predictor block, the video coder may, for each respective sample in a set of samples in the predictor block, determine, based on an initial value of the first weight and a distance between the respective sample and a first boundary of the predictor block, a value of the first weight for the respective sample. Additionally, the video coder may determine, based on the initial value of the second weight and a distance between the respective sample and a second boundary of the predictor block, a value of the second weight for the respective sample. The video coder may also determine a primary value for the respective sample. The video coder may then determine a secondary value for the respective sample based on the first weight, second weight, and the primary value.

    BIT SHIFTING FOR CROSS-COMPONENT ADAPTIVE LOOP FILTERING FOR VIDEO CODING
    69.
    发明申请
    BIT SHIFTING FOR CROSS-COMPONENT ADAPTIVE LOOP FILTERING FOR VIDEO CODING 有权

    公开(公告)号：US20210092370A1

    公开(公告)日：2021-03-25

    申请号：US17028209

    申请日：2020-09-22

    Applicant: QUALCOMM Incorporated

    Inventor： Nan Hu ,  Jie Dong ,  Vadim Seregin ,  Marta Karczewicz

    IPC: H04N19/117 ,  H04N19/70 ,  H04N19/176

    Abstract: An example method includes decoding a plurality of filter coefficients of a cross-component adaptive loop filter, wherein decoding a particular filter coefficient of the plurality of filter coefficients comprises: decoding, from an encoded video bitstream, a syntax element specifying an exponent value that represents a log base 2 of an absolute value of the particular filter coefficient as two raised to the power of the exponent value; and determining a value of the particular filter coefficient based on the exponent value; reconstructing samples of a block of video data; and cross-component adaptive loop filtering, based on the plurality of filter coefficients, the block of video data.

    GEOMETRIC PARTITION MODE WITH HARMONIZED MOTION FIELD STORAGE AND MOTION COMPENSATION
    70.
    发明申请
    GEOMETRIC PARTITION MODE WITH HARMONIZED MOTION FIELD STORAGE AND MOTION COMPENSATION 有权

    公开(公告)号：US20210058617A1

    公开(公告)日：2021-02-25

    申请号：US16998639

    申请日：2020-08-20

    Applicant: QUALCOMM Incorporated

    Inventor： Kevin Pascal Andre Reuze ,  Han Huang ,  Vadim Seregin ,  Marta Karczewicz

    IPC: H04N19/119 ,  H04N19/132 ,  H04N19/105 ,  H04N19/176

    Abstract: A method of decoding video data includes determining that a geometric partition mode is enabled for a current block of the video data and determining a split line dividing the current block into a first partition and a second partition, where determining the split line comprises selecting an angle for the split line from a plurality of angles, Each angle of the plurality of angles corresponding to an N:M ratio of samples of the current block, where N and M are integers. The split line is not at a corner of the current block. The method further includes determining geometric mode weights for the current block using the angle of the split line, generating a first prediction block using motion information for the first partition, and generating a second prediction block using motion information for the second partition.

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