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    ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD AND DECODING METHOD
    2.
    发明公开
    ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD AND DECODING METHOD 审中-公开

    公开(公告)号：EP4451678A2

    公开(公告)日：2024-10-23

    申请号：EP24198384.0

    申请日：2018-04-24

    申请人： Panasonic Intellectual Property Corporation of America

    发明人： ABE, Kiyofumi ,  NISHI, Takahiro ,  TOMA, Tadamasa ,  KANOH, Ryuichi ,  HASHIMOTO, Takashi

    IPC分类号： H04N19/577

    摘要： An encoder that encodes a current block to be encoded in a picture, using inter prediction, and includes a processor and memory. Using the memory, the processor: obtains two prediction images from two reference pictures by performing motion compensation using motion vectors each corresponding to a different one of the two reference pictures; obtains, from the two reference pictures, two gradient images corresponding to the two prediction images; derives a local motion estimation value for each of sub-blocks, using the two prediction images and the two gradient images, the sub-blocks being obtained by partitioning the current block; and generates a final prediction image for the current block using the two prediction images, the two gradient images, and the local motion estimation value derived for each of the sub-blocks.

    ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD
    4.
    发明公开
    ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD 审中-公开

    公开(公告)号：EP3694211A1

    公开(公告)日：2020-08-12

    申请号：EP18864764.8

    申请日：2018-10-03

    申请人： Panasonic Intellectual Property Corporation of America

    发明人： NISHI, Takahiro ,  TOMA, Tadamasa ,  ABE, Kiyofumi ,  KANOH, Ryuichi

    IPC分类号： H04N19/31 ,  H04N19/46

    摘要： An encoder (100) which encodes a video including a plurality of pictures includes circuitry (160) and memory (162). Using the memory (162), the circuitry (160) performs: encoding a first picture among the plurality of pictures; and performing (i) a first operation for encoding a parameter set for a second picture which follows the first picture in coding order among the plurality of pictures after encoding the first picture, and encoding the second picture after encoding the parameter set, or (ii) a second operation for encoding the second picture without encoding the parameter set after encoding the first picture. The circuitry (160) performs the first operation when the second picture is a determined picture, in the performing of the first operation or the second operation.

    ENCODING DEVICE AND ENCODING METHOD
    9.
    发明公开
    ENCODING DEVICE AND ENCODING METHOD 审中-实审

    公开(公告)号：EP4395317A2

    公开(公告)日：2024-07-03

    申请号：EP24175875.4

    申请日：2018-07-25

    申请人： Panasonic Intellectual Property Corporation of America

    发明人： KANOH, Ryuichi ,  ABE, Kiyofumi ,  TOMA, Tadamasa ,  NISHI, Takahiro

    IPC分类号： H04N19/157

    CPC分类号： H04N19/12 ,  H04N19/126 ,  H04N19/176 ,  H04N19/60 ,  H04N19/157

    摘要： An encoder (100) which encodes a current block to be encoded in an image includes: a transformer (106) which performs a primary transform from residuals of the current block to primary coefficients, determines whether to apply a secondary transform to the current block, and performs the secondary transform from the primary coefficients to secondary coefficients when the secondary transform is applied; a quantizer (108) which calculates quantized primary coefficients by performing a first quantization on the primary coefficients when a secondary transform is not applied, and calculates quantized secondary coefficients by performing a second quantization different from the first quantization on the secondary coefficients when the secondary transform is applied; and an entropy encoder (110) which generates an encoded bitstream by encoding either quantized primary coefficients or quantized secondary coefficients.