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    ENCODING METHOD AND APPARATUS
    82.
    发明公开
    ENCODING METHOD AND APPARATUS 审中-实审

    公开(公告)号：EP4319161A3

    公开(公告)日：2024-04-17

    申请号：EP23217131.4

    申请日：2018-10-08

    申请人： Huawei Technologies Co., Ltd.

    发明人： ZHAO, Yin ,  YANG, Haitao ,  CHEN, Jianle

    IPC分类号： H04N19/122 ,  H04N19/147 ,  H04N19/61 ,  H04N19/60 ,  H04N19/12 ,  H04N19/17

    CPC分类号： H04N19/176 ,  H04N19/119 ,  H04N19/12 ,  H04N19/136 ,  H04N19/157 ,  H04N19/122 ,  H04N19/61

    摘要： The present disclosure discloses a video decoding method, including: parsing a received bitstream to obtain prediction information of a CU; obtaining a target transform mode of a residual TU; parsing the received bitstream to obtain transform coefficients of the residual TV; applying an inverse quantization to the transform coefficients of the residual TU to obtain dequantized coefficients; applying, based on the target transform mode, an inverse transform to the dequantized coefficients to obtain a residual block of the residual TU; obtaining a prediction block of the CU based on the prediction information; and obtaining a video block based on the residual block and the prediction block; and outputting a video sequence, the video sequence including a video frame that includes the video block.

    METHODS AND DEVICES FOR ENCODING AND DECODING VIDEO PICTURES
    86.
    发明公开
    METHODS AND DEVICES FOR ENCODING AND DECODING VIDEO PICTURES 审中-公开

    公开(公告)号：EP3417617A1

    公开(公告)日：2018-12-26

    申请号：EP16890799.6

    申请日：2016-02-17

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： PETTERSSON, Martin ,  ANDERSSON, Kenneth ,  WENNERSTEN, Per

    IPC分类号： H04N19/51 ,  H04N19/567 ,  H04N19/53 ,  H04N19/54 ,  H04N19/577

    CPC分类号： H04N19/573 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/30 ,  H04N19/44 ,  H04N19/85

    摘要： A method (20) is disclosed performed in an encoder (40) for encoding video pictures into a video bit stream, the method (20) comprising: obtaining (21) a transformed version (2′; 12′, 13′) of a reference picture (2; 12, 13), by using a geometric transformation comprising at least one of: scaling, rotation, shearing, reflection, and projection; performing (22) a matching procedure at least once, the matching procedure comprising matching a reference matching area (6; 15, 16) of the reference picture (2; 12, 13) to a matching area (4; 16, 15) of a second picture (1; 13, 12) and matching a reference matching area (6′; 15′, 16′) of the transformed version (2′; 12′, 13′) to the matching area (4; 16, 15) of the second picture (1; 13, 12); and encoding (23) a block (3; 14) of the current picture (1; 11) by selecting for the block (3; 14) a first prediction area (5; 15, 16) based on the reference matching area (6; 15, 16) or a second prediction area (5′; 15′, 16′) based on the transformed reference matching area (6′; 15′, 16′), wherein the first and second prediction areas at least partly overlap the respective reference matching areas (6; 6′; 15, 16, 15′, 16′) and wherein the prediction area having lowest matching error to a corresponding matching area (4; 15, 16) of the second picture (1; 13, 12) is selected as prediction for the block. A corresponding method (30) in a decoder (50) is disclosed, and encoder (40), decoder (50), computer programs and computer program products.

    METHOD AND APPARATUS FOR SCAN ORDER SELECTION
    87.
    发明公开
    METHOD AND APPARATUS FOR SCAN ORDER SELECTION 审中-公开

    公开(公告)号：EP3412027A1

    公开(公告)日：2018-12-12

    申请号：EP16763108.4

    申请日：2016-02-12

    申请人： Huawei Technologies Co., Ltd.

    发明人： FILIPPOV, Alexey Konstantinovich ,  RUFITSKIY, Vasily Alexeevich

    IPC分类号： H04N19/176 ,  H04N19/70 ,  H04N19/129 ,  H04N19/136 ,  H04N19/18

    CPC分类号： H04N19/129 ,  H04N19/136 ,  H04N19/176 ,  H04N19/18 ,  H04N19/70

    摘要： The invention proposes a decoder for decoding coefficients of blocks of a video sequence from a bitstream. The decoder comprises a decoding module configured to decode one or more coefficient vectors of each block from the bitstream. The decoder comprises a check module configured to reconstruct, for at least one block, hidden information from one or more coefficients of that block, the hidden information constituting or forming part of scan order information associated with that block. The decoder comprises a scan order selector configured to select a scan order for each block from a set of scan orders, preferably from a set of pre-defined and generated scan orders, on the basis of the scan order information associated with that block. The decoder comprises a deserializer configured to inverse scan, for each block, the one or more coefficient vectors of that block according to the scan order selected for that block so as to obtain a coefficient matrix.

    DECODING METHOD FOR INTRA PREDICTING A BLOCK BY FIRST PREDICTING THE PIXELS AT THE BOUNDARY
    88.
    发明授权
    DECODING METHOD FOR INTRA PREDICTING A BLOCK BY FIRST PREDICTING THE PIXELS AT THE BOUNDARY 有权

    公开(公告)号：EP3038362B1

    公开(公告)日：2018-12-12

    申请号：EP16150161.4

    申请日：2008-10-09

    申请人： Maxell, Ltd.

    发明人： TAKAHASHI, Masashi ,  MURAKAMI, Tomokazu

    IPC分类号： H04N19/593

    CPC分类号： H04N19/11 ,  H04N19/124 ,  H04N19/147 ,  H04N19/159 ,  H04N19/17 ,  H04N19/176 ,  H04N19/182 ,  H04N19/567 ,  H04N19/593

    摘要： The present invention provides an image encoding/decoding technique that is capable of achieving the higher compression efficiency. An image encoding method comprises: an intra prediction step which performs intra prediction on a block basis to generate a predicted image; a subtraction step which calculates the difference in prediction between the predicted image generated by the intra prediction step and an original image; a frequency conversion step which performs frequency conversion processing for the difference in prediction; a quantization step which subjects the output of the frequency conversion step to quantization processing; and a variable-length encoding step which subjects the output of the quantization step to variable-length encoding processing; wherein the intra prediction encoding step predicts a target pixel to be encoded by use of pixel values of two reference pixels between which the target pixel to be encoded is located.