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    Fast rate-distortion optimized quantization
    111.
    发明授权
    Fast rate-distortion optimized quantization 有权

    公开(公告)号：US10356422B2

    公开(公告)日：2019-07-16

    申请号：US14735595

    申请日：2015-06-10

    Applicant: QUALCOMM Incorporated

    Inventor： Xin Zhao ,  Wei-Jung Chien ,  Xianglin Wang

    IPC: H04N19/105 ,  H04N19/147 ,  H04N19/124 ,  H04N19/176 ,  H04N19/139

    Abstract: A system and method for applying Rate Distortion Optimized Quantization (RDOQ) is disclosed. In one example, there is provided a method that includes determining at least one prediction type and at least one partition type for use in encoding at least one block of video data. The method further includes applying a non-RDOQ quantization scheme to the at least one block of the video data. The non-RDOQ quantization scheme may be applied during the determination of the at least one prediction type and the at least one partition type. The method further includes applying an RDOQ quantization scheme to the at least one block upon determining the at least one prediction type and the at least one partition type.

    INTRA-PREDICTION WITH FAR NEIGHBORING PIXELS
    112.
    发明申请
    INTRA-PREDICTION WITH FAR NEIGHBORING PIXELS 审中-公开

    公开(公告)号：US20190174145A1

    公开(公告)日：2019-06-06

    申请号：US16209560

    申请日：2018-12-04

    Applicant: QUALCOMM Incorporated

    Inventor： Kai Zhang ,  Jianle Chen ,  Xin Zhao ,  Marta Karczewicz

    IPC: H04N19/82 ,  H04N19/176 ,  H04N19/159

    Abstract: A video decoder can be configured to decode a block of video data by determining a block of video data is coded in an intra prediction mode; determining one or more samples for intra predicting the block of video data, wherein the one or more samples comprise samples that are already reconstructed and not adjacent to the block of video data; and based on the one or more samples, generating a predictive block for the block of video data.

    Method and apparatus for low complexity quarter pel generation in motion search
    113.
    发明授权
    Method and apparatus for low complexity quarter pel generation in motion search 有权

    公开(公告)号：US10291932B2

    公开(公告)日：2019-05-14

    申请号：US14710967

    申请日：2015-05-13

    Applicant: QUALCOMM Incorporated

    Inventor： Wei-Jung Chien ,  Xianglin Wang ,  Xin Zhao

    IPC: H04N19/523 ,  H04N19/105 ,  H04N19/182 ,  H04N19/176 ,  H04N19/117 ,  H04N19/80 ,  H04N19/59

    Abstract: This disclosure provides systems and methods for low complexity quarter pel generation in motion search for video coding. The method can include storing full-pixel position information related to a plurality of rows of video information of a reference frame in a memory. The method can also include applying a vertical interpolation filter to the full-pixel position information for video information related to the reference frame to determine a first sub-pel position information. The method can also include applying a horizontal interpolation filter to the first sub-pel position information to determine a second sub-pel position information for the every other row of video data. The method can also include generating a syntax element indicating pixel motion of a current frame based on the first sub-pel position information. The method can also include encoding a block based on the generated syntax element.

    POSITION-DEPENDENT PREDICTION COMBINATIONS IN VIDEO CODING
    114.
    发明申请
    POSITION-DEPENDENT PREDICTION COMBINATIONS IN VIDEO CODING 审中-公开

    公开(公告)号：US20190110045A1

    公开(公告)日：2019-04-11

    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: H04N19/11 ,  H04N19/176 ,  H04N19/117

    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.

    INTRA FILTERING APPLIED TOGETHER WITH TRANSFORM PROCESSING IN VIDEO CODING
    115.
    发明申请
    INTRA FILTERING APPLIED TOGETHER WITH TRANSFORM PROCESSING IN VIDEO CODING 审中-公开

    公开(公告)号：US20180367814A1

    公开(公告)日：2018-12-20

    申请号：US15987560

    申请日：2018-05-23

    Applicant: QUALCOMM Incorporated

    Inventor： Vadim Seregin ,  Xin Zhao ,  Marta Karczewicz

    IPC: H04N19/70 ,  H04N19/159 ,  H04N19/174 ,  H04N19/593 ,  H04N19/176 ,  H04N19/119

    Abstract: A method of decoding video data includes receiving a block of video data, determining an intra prediction mode for the block of video data, and determining whether or not to use a position-dependent prediction combination (PDPC) mode to decode the block of video data based at least on the determined intra prediction mode. The method may also include receiving a syntax element associated with a primary transform or a secondary transform used for a block of video data, determining a usage of one or more video coding tools based on a value of the syntax element, the one or more video coding tools being video coding techniques other than the primary transform or secondary transform, and applying the one or more coding tools to the block of video data based on the determined usage.

    LOW-COMPLEXITY SIGN PREDICTION FOR VIDEO CODING
    118.
    发明申请
    LOW-COMPLEXITY SIGN PREDICTION FOR VIDEO CODING 审中-公开

    公开(公告)号：US20180176563A1

    公开(公告)日：2018-06-21

    申请号：US15848803

    申请日：2017-12-20

    Applicant: QUALCOMM Incorporated

    Inventor： Xin Zhao ,  Vadim Seregin ,  Li Zhang ,  Marta Karczewicz ,  Amir Said

    IPC: H04N19/122 ,  H04N19/105 ,  H04N19/18 ,  H04N19/176

    Abstract: Sign prediction technology for video coding are generally described. An example device includes a memory configured to store video data, and processing circuitry in communication with the memory. The processing circuitry is configured to determine that a block of the video data stored to the memory is eligible to be coded using sign prediction, to perform the sign prediction with respect to one or more transform coefficients of the block only if the block meets a predetermined criterion, wherein the predetermined criterion is based on at least one of: a width of the block, a height of the block, a coding mode used to code the block, or a position of one or more sign-predicted transform coefficients within the block, and to code the block based on the sign prediction performed with respect to the block.

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