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    Intra smoothing filter for video coding
    71.
    发明专利
    Intra smoothing filter for video coding 未知

    公开(公告)号：AU2011308653A1

    公开(公告)日：2013-05-02

    申请号：AU2011308653

    申请日：2011-09-30

    Applicant: QUALCOMM INC

    Inventor： VAN DER AUWERA GEERT ,  WANG XIANGLIN ,  COBAN MUHAMMED ZEYD ,  KARCZEWICZ MARTA ,  ZHENG YUNFEI

    IPC: H04N7/26 ,  H04N19/593

    Abstract: This disclosure relates to techniques for reducing the amount of additional data encoded with a block encoded using intra-predictive coding. Particularly, the techniques provide apparatus and methods of applying a smoothing filter to prediction samples used in intra-predictive coding. For example, in fixed mode-dependent intra- predictive coding, a video encoder may determine the type of smoothing filter applied to prediction samples based on block size and intra-prediction mode combination associated with the current block, where the combination is used to look up a filter in a first filter table. In adaptive mode-dependent intra-predictive coding, the encoder uses two filters, one from the first filter table and another from a second filter table, applies both filters, and determines which yields better results. When the second filter table filter yields better results, the encoder encodes a filtering indication. When a filter from the first filter table is used, no filtering indication is encoded.

    AFFINE LINEAR WEIGHTED INTRA PREDICTION IN VIDEO CODING
    72.
    发明专利
    AFFINE LINEAR WEIGHTED INTRA PREDICTION IN VIDEO CODING 未知

    公开(公告)号：ZA202108781B

    公开(公告)日：2025-01-29

    申请号：ZA202108781

    申请日：2021-11-08

    Applicant: QUALCOMM INC

    Inventor： RAMASUBRAMONIAN ADARSH KRISHNAN ,  VAN DER AUWERA GEERT ,  PHAM VAN LUONG ,  KARCZEWICZ MARTA

    Abstract: A video coder performs a Most-Probable Mode (MPM) derivation process that derives one or more MPMs for a current block that is not coded using affine linear weighted intra prediction (ALWIP). As part of performing the MPM derivation process, the video coder determines whether a neighboring block of the current block is an ALWIP-coded neighboring block. Based on the neighboring block being an ALWIP-coded neighboring block, the video coder determines that a value of an intra prediction mode of the neighboring block is a value indicating a planar mode. The video coder codes the current block based on one of the MPMs for the current block.

    BLOCK-BASED QUANTIZED RESIDUAL DOMAIN PULSE CODE MODULATION ASSIGNMENT FOR INTRA PREDICTION MODE DERIVATION
    73.
    发明专利
    BLOCK-BASED QUANTIZED RESIDUAL DOMAIN PULSE CODE MODULATION ASSIGNMENT FOR INTRA PREDICTION MODE DERIVATION 未知

    公开(公告)号：ZA202108166B

    公开(公告)日：2025-01-29

    申请号：ZA202108166

    申请日：2021-10-22

    Applicant: QUALCOMM INC

    Inventor： COBAN MUHAMMED ZEYD ,  VAN DER AUWERA GEERT ,  KARCZEWICZ MARTA

    Abstract: Techniques are described for improving video coding. For example, a first block of a picture included in an encoded video bitstream can be obtained. A second block of the picture can be determined as being coded (e.g., encoded) using a type of block-based quantized residual domain pulse code modulation (BDPCM) mode, such as vertical BDPCM mode or horizontal BDPCM mode. In the event the second block is coded using the vertical BDPCM mode, a vertical intra-prediction mode can be determined for an intra-prediction mode list for the first block. The vertical intra-prediction mode can be added to the intra-prediction mode list for the first block. In the event the second block is coded using the horizontal BDPCM mode, a horizontal intra-prediction mode can be determined for the intra-prediction mode list for the first block and the horizontal intra-prediction mode can be added to the intra-prediction mode list.

    POSITION DEPENDENT INTRA PREDICTION COMBINATION WITH WIDE ANGLE INTRA PREDICTION
    75.
    发明专利
    POSITION DEPENDENT INTRA PREDICTION COMBINATION WITH WIDE ANGLE INTRA PREDICTION 未知

    公开(公告)号：CA3105383C

    公开(公告)日：2024-04-30

    申请号：CA3105383

    申请日：2019-07-15

    Applicant: QUALCOMM INC

    Inventor： VAN DER AUWERA GEERT ,  RAMASUBRAMONIAN ADARSH KRISHNAN ,  KARCZEWICZ MARTA

    IPC: H04N19/11 ,  H04N19/105 ,  H04N19/119 ,  H04N19/167 ,  H04N19/176 ,  H04N19/593

    Abstract: Techniques are described using Position Dependent Intra Prediction Combination (PDPC) with wide angle intra prediction. For example, a size of the current block of video data can be determined. Based on the size, a wide angle intra-prediction mode can be determined for the current block. A prediction block for the current block can be determined using the wide angle intra-prediction mode. A prediction sample from the prediction block can be modified to generate a modified prediction sample using PDPC, which can include determining one or more reference samples that are external to the current block based on the wide angle intra-prediction mode, and modifying the prediction sample to generate the modified prediction sample based on the determined one or more reference samples.

    Position dependent intra prediction combination with wide angle intra prediction
    77.
    发明专利
    Position dependent intra prediction combination with wide angle intra prediction 未知

    公开(公告)号：NZ771588A

    公开(公告)日：2023-02-24

    申请号：NZ77158819

    申请日：2019-07-15

    Applicant: QUALCOMM INC

    Inventor： KARCZEWICZ MARTA ,  RAMASUBRAMONIAN ADARSH KRISHNAN ,  VAN DER AUWERA GEERT

    IPC: H04N19/11 ,  H04N19/105 ,  H04N19/119 ,  H04N19/167 ,  H04N19/176 ,  H04N19/593

    Abstract: Techniques are described using Position Dependent Intra Prediction Combination (PDPC) with wide angle intra prediction. For example, a size of the current block of video data can be determined. Based on the size, a wide angle intra-prediction mode can be determined for the current block. A prediction block for the current block can be determined using the wide angle intra-prediction mode. A prediction sample from the prediction block can be modified to generate a modified prediction sample using PDPC, which can include determining one or more reference samples that are external to the current block based on the wide angle intra-prediction mode, and modifying the prediction sample to generate the modified prediction sample based on the determined one or more reference samples.

    PREDICTION SIGNAL FILTERING IN AFFINE LINEAR WEIGHTED INTRA PREDICTION
    80.
    发明专利
    PREDICTION SIGNAL FILTERING IN AFFINE LINEAR WEIGHTED INTRA PREDICTION 未知

    公开(公告)号：SG11202111406QA

    公开(公告)日：2021-11-29

    申请号：SG11202111406Q

    申请日：2020-05-08

    Applicant: QUALCOMM INC

    Inventor： RAMASUBRAMONIAN ADARSH KRISHNAN ,  VAN DER AUWERA GEERT ,  PHAM VAN LUONG ,  KARCZEWICZ MARTA

    IPC: H04N19/593 ,  H04N19/85

    Abstract: A device for decoding video data determine that a current block of video data is encoded in an affine linear weighted intra prediction (ALWIP) mode; derives, based on a set of left edge neighboring samples of the current block and a set of top edge neighboring samples of the current block, a subset of left edge samples and a subset of top edge samples; applies an affine model to the subset of left edge samples and the subset of top edge samples to generate an intermediate block of intermediate samples; filters the intermediate samples to generate a final prediction block; decodes the current block of video data based on the final prediction block.

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