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    Method and apparatus of interlayer texture prediction
    191.
    发明授权
    Method and apparatus of interlayer texture prediction 有权

    公开(公告)号：US10469852B2

    公开(公告)日：2019-11-05

    申请号：US14422051

    申请日：2013-07-30

    Applicant: MediaTek Inc.

    Inventor： Tzu-Der Chuang ,  Zhenzhong Chen ,  Shan Liu ,  Ching-Yeh Chen ,  Chih-Wei Hsu

    IPC: H04N19/187 ,  H04N19/463 ,  H04N19/33 ,  H04N19/36 ,  H04N19/176 ,  H04N19/31 ,  H04N19/50 ,  H04N19/70

    Abstract: A method and apparatus for coding video data in a scalable or three-dimensional video coding system are disclosed. In one embodiment, context for the input data associated with an inter-layer or inter-view coding syntax element of a current block in an enhancement-layer (EL) or a dependent view is formed or the input data is parsed to identify the context based on information associated with one or more neighboring blocks, information associated with the current block, or both. In another embodiment, encoding or decoding is applied to the input data associated with the current block in the EL using inter-layer texture prediction based on the BL block in the BL, wherein a flag indicating whether there is any transform coefficient coded for the current block is signaled.

    Non-local adaptive loop filter
    192.
    发明授权
    Non-local adaptive loop filter 有权

    公开(公告)号：US10462459B2

    公开(公告)日：2019-10-29

    申请号：US15485694

    申请日：2017-04-12

    Applicant: MEDIATEK INC.

    Inventor： Ching-Yeh Chen ,  Jian-Liang Lin ,  Tzu-Der Chuang ,  Yu-Wen Huang

    IPC: H04N19/117 ,  H04N19/80 ,  H04N19/176 ,  H04N19/107 ,  H04N19/139 ,  H04N19/126 ,  H04N19/86 ,  H04N19/186 ,  H04N19/157 ,  H04N19/82

    Abstract: Aspects of the disclosure provide a method for denoising a reconstructed picture. The method can include receiving reconstructed video data corresponding to a picture, dividing the picture into current patches, forming patch groups each including a current patch and a number of reference patches that are similar to the current patch, denoising the patch groups to modify pixel values of the patch groups to create a filtered picture, and generating a reference picture based on the filtered picture for encoding or decoding a picture. The operation of denoising the patch groups includes deriving a variance of compression noise in the respective patch group based on a compression noise model. A selection of model parameters is determined based on coding unit level information.

    Method for color index coding using a generalized copy previous mode
    193.
    发明授权
    Method for color index coding using a generalized copy previous mode 有权

    公开(公告)号：US10448049B2

    公开(公告)日：2019-10-15

    申请号：US15505972

    申请日：2015-09-02

    Applicant: MEDIATEK INC.

    Inventor： Jing Ye ,  Shan Liu ,  Jungsun Kim ,  Wang-Lin Lai ,  Tzu-Der Chuang ,  Yu-Chen Sun ,  Xiaozhong Xu

    IPC: H04N19/00 ,  H04N19/593 ,  H04N19/70 ,  H04N19/184 ,  G06F17/27

    Abstract: A method for color index coding of blocks in a picture is disclosed. In one embodiment for the decoder side, a current coding mode is parsed from the input coded bitstream for one or more first currently decoded pixels in a current block starting from a first starting position. If the current coding mode corresponds to a generalized copy-previous-row mode, one or more first reference pixels starting from a first starting reference position located at T-th row above the first currently decoded pixels are identified, where T is an integer equal to or greater than one. The first reference pixels starting from the first starting reference position are then used to decode the first currently decoded pixels starting from a first starting position by copying the first reference pixels starting from the first starting reference position respectively. The system may also include a copy-left mode or escape mode.

    Methods of constrained intra block copy for reducing worst case bandwidth in video coding
    194.
    发明授权
    Methods of constrained intra block copy for reducing worst case bandwidth in video coding 有权

    公开(公告)号：US10432966B2

    公开(公告)日：2019-10-01

    申请号：US15564205

    申请日：2016-04-13

    Applicant: MEDIATEK INC.

    Inventor： Tzu-Der Chuang ,  Shan Liu ,  Xiaozhong Xu

    IPC: H04N19/593 ,  H04N19/176 ,  H04N19/105 ,  H04N19/159 ,  H04N19/11 ,  H04N19/70 ,  H04N19/51

    Abstract: A method and apparatus of video coding using IntraBC (Intra Block Copy) for video data are disclosed. Restricted prediction is determined, in which one or more selected PU (prediction unit) sizes, PU prediction types or both are disabled or disallowed. Video coding is applied to the current block using coding modes including IntraBC prediction in accordance with the restricted prediction. The selected PU sizes, PU prediction types or both may correspond to 8×8 bi-prediction PU. In one example, the selected PU sizes, PU prediction types or both are disabled or disallowed for the restricted prediction except one or more conditions are determined to be satisfied. The conditions may correspond to at least one of two motion vectors of the 8×8 bi-prediction PU having integer values, the conditions may also correspond to at least one of motion vector components of the 8×8 bi-prediction PU having integer valueIntraBCIntraBCIntraBCIntraBCIntraBC.

    Method and apparatus of error handling for video coding using intra block copy mode
    196.
    发明授权
    Method and apparatus of error handling for video coding using intra block copy mode 有权

    公开(公告)号：US10356438B2

    公开(公告)日：2019-07-16

    申请号：US15578191

    申请日：2016-06-03

    Applicant: MEDIATEK INC.

    Inventor： Tzu-Der Chuang ,  Chia-Yun Cheng ,  Han-Liang Chou ,  Ching-Yeh Chen ,  Yu-Chen Sun ,  Yu-Wen Huang

    IPC: H04N19/593 ,  H04N19/563 ,  H04N19/513 ,  H04N19/70

    Abstract: In order to overcome the issue caused by a decoded block vector (BV) pointing to a reference block overlapping with an unavailable area, various methods are disclosed. According to one method, if the reference block overlaps with an unavailable area, the reference pixels in the unavailable area are generated for IntraBC prediction of the current block by padding from neighboring available pixels. The padding can be done in the horizontal direction and then the vertical direction. The padding may also done in the vertical direction first and then horizontal direction. In another method, if the reference block overlaps with an unavailable area, the reference pixels in the unavailable area are generated for IntraBC prediction of the current block by using previous decoded pixels in the unavailable area. A pre-defined value may also be used for the unavailable area.

    Methods and apparatus of decoding process for palette syntax
    199.
    发明授权
    Methods and apparatus of decoding process for palette syntax 有权

    公开(公告)号：US09900624B2

    公开(公告)日：2018-02-20

    申请号：US15542739

    申请日：2016-02-05

    Applicant: MEDIATEK INC.

    Inventor： Wang-Lin Lai ,  Jungsun Kim ,  Tzu-Der Chuang ,  Jing Ye ,  Shan Liu

    IPC: H04N19/44 ,  H04N19/86 ,  H04N19/186 ,  H04N19/176 ,  H04N19/70 ,  H04N19/593

    CPC classification number: H04N19/86 ,  H04N19/176 ,  H04N19/186 ,  H04N19/44 ,  H04N19/593 ,  H04N19/70

    Abstract: Methods and apparatus for image or video decoding in a video decoding system are disclosed. Input data associated with a current block coded with palette mode is received to parse a palette predictor run. A position of reused colors in a palette predictor table is computed according to the palette predictor run. A size of the palette predictor table is determined and compared with the position computed according to the palette predictor run to obtain a comparison result. The decoder applies palette decoding to the current block according to the comparison result. If the comparison result indicates the position computed according to the palette predictor run is not within the palette predictor table, the position is changed to a new position to indicate a corresponding reused color for the current block or a decoding process of palette predictor reuse flags is terminated.

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