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    Methods for Palette Mode Context Coding and Binarization in Video Coding
    1.
    发明申请
    Methods for Palette Mode Context Coding and Binarization in Video Coding 审中-公开

    公开(公告)号：US20180098092A1

    公开(公告)日：2018-04-05

    申请号：US15563788

    申请日：2016-04-08

    Applicant: HFI Innovation Inc.

    Inventor： Jing YE ,  Jungsun KIM ,  Shan LIU ,  Kai ZHANG ,  Tzu-Der CHUANG ,  Weijia ZHU

    IPC: H04N19/70 ,  H04N19/13 ,  H04N19/176

    Abstract: A method of video coding using the palette coding mode with reduced complexity by sharing context(s) between context-based entropy coding of syntax element for the last run type mode and context-based entropy coding of syntax element for the run type mode is disclosed. A method with reduced complexity for binarization of the syntax element associated with the number of palette indices of the current block is disclosed, where Rice parameter is derived for the number of palette indices without the need for a division or table lookup operation. In another method, the syntax element to specify whether transpose process is applied to associated palette indices of the current block is signalled in the bitstream for the current block in a location after the syntax element to specify a last run type mode for the current block.

    Methods of Handling Escape Pixel as a Predictor in Index Map Coding
    4.
    发明申请
    Methods of Handling Escape Pixel as a Predictor in Index Map Coding 审中-公开

    公开(公告)号：US20170105002A1

    公开(公告)日：2017-04-13

    申请号：US15389743

    申请日：2016-12-23

    Applicant: HFI Innovation Inc.

    Inventor： Tzu-Der CHUANG ,  Yu-Chen SUN ,  Jungsun KIM ,  Shan LIU ,  Wang-Lin LAI ,  Yi-Wen CHEN

    IPC: H04N19/157 ,  H04N19/50

    Abstract: In a palette prediction that includes a copy-above mode for predicting one or more first pixels based on one or more above pixels located above said one or more first pixels correspondingly, a method of palette mode coding using palette prediction for a picture includes receiving input data associated with a current block and determining a current coding mode for one or more current pixels. If the current coding mode corresponds to the copy-above mode, then the method identifies one or more above pixels located above said one or more current pixels correspondingly, wherein said one or more above pixels are restricted to be non-Escape pixels. The method further encodes the one or more current pixels by using said one or more above pixels as predictors.

    Methods of Palette Mode Coding in Video Coding
    5.
    发明申请
    Methods of Palette Mode Coding in Video Coding 审中-公开

    公开(公告)号：US20180098093A1

    公开(公告)日：2018-04-05

    申请号：US15563811

    申请日：2016-04-08

    Applicant: HFI Innovation Inc.

    Inventor： Jing YE ,  Jungsun KIM ,  Shan LIU ,  Wang-Lin LAI ,  Tzu-Der CHUANG

    IPC: H04N19/70 ,  H04N19/176 ,  H04N19/186

    CPC classification number: H04N19/70 ,  H04N19/176 ,  H04N19/186 ,  H04N19/463 ,  H04N19/593 ,  H04N19/91

    Abstract: A simplified syntax signalling for the number of palette indices is disclosed, where the syntax element corresponding to the total number of palette indices minus one is signalled and the palette indices are associated with the copy-index modes in the current block. In another embodiment, a syntax corresponding to the number of palette indices minus 1 is signalled, where the palette indices are associated with the copy-index modes in the current block. According to this embodiment, the syntax is constrained to a range from 0 to block size minus 1. In yet another embodiment, conformance constraint is imposed on the palette predictor run. For a current position of the palette predictor list, a syntax element corresponding to a current palette predictor run is parsed from the input bitstream and the syntax element is constrained to a range of values access valid entries in the palette predictor.

    Method of Palette Predictor Signaling for Video Coding
    7.
    发明申请
    Method of Palette Predictor Signaling for Video Coding 审中-公开

    公开(公告)号：US20200077095A1

    公开(公告)日：2020-03-05

    申请号：US16679650

    申请日：2019-11-11

    Applicant: HFI Innovation Inc.

    Inventor： Tzu-Der CHUANG ,  Jungsun KIM ,  Yu-Chen SUN ,  Wang-Lin LAI ,  Ching-Yeh CHEN ,  Jing YE ,  Shan LIU

    IPC: H04N19/157 ,  H04N19/625 ,  H04N19/44 ,  H04N19/426 ,  H04N19/122 ,  H04N19/11 ,  H04N19/103 ,  H04N19/593 ,  H04N19/176

    Abstract: Methods for coding syntax related to palette coding generated in a video coding system are disclosed. According to one embodiment, the current block size checked against the pre-defined block size. If the current block size is larger than the pre-defined block size, a current coding mode is selected from a coding group excluding a palette coding mode. If the current block size is smaller than or equal to the pre-defined block size, the current coding mode is selected from a coding group including the palette coding mode. In another embodiment, if the current block size is greater than a maximum transform size, a current coding mode is selected from a coding group excluding a palette coding mode. If the current block size is smaller than or equal to the maximum transform size, the current coding mode is selected from a coding group including the palette coding mode.

    Methods of Escape Pixel Coding in Index Map Coding
    8.
    发明申请
    Methods of Escape Pixel Coding in Index Map Coding 审中-公开

    公开(公告)号：US20190116380A1

    公开(公告)日：2019-04-18

    申请号：US15524369

    申请日：2015-11-12

    Applicant: HFI Innovation Inc.

    Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Chen SUN ,  Jing YE ,  Shan LIU ,  Xiaozhong XU ,  Jungsun KIM

    IPC: H04N19/593 ,  H04N19/176 ,  H04N19/159 ,  H04N19/463 ,  H04N19/44 ,  H04N19/70

    Abstract: A method of video coding with reduced implementation cost by reusing transform coefficient buffer palette for palette coding is disclosed. If the current prediction mode is an Intra prediction mode or the Inter prediction mode, information related to transform coefficients for prediction residual of the current block resulted from Intra prediction or Inter prediction is stored in the transform coefficient buffer. If the current prediction mode is the palette coding mode, information related to palette data associated with the current block is stored in the transform coefficient buffer. The current block is then encoded or decoded based on the information related to the transform coefficients if the current block is coded in the Intra prediction mode or the Inter prediction mode, or the information related to the palette data stored in the transform coefficient buffer if the current prediction mode is the palette coding mode.

    METHODS OF ESCAPE PIXEL CODING IN INDEX MAP CODING
    9.
    发明申请
    METHODS OF ESCAPE PIXEL CODING IN INDEX MAP CODING 审中-公开

    公开(公告)号：US20200288170A1

    公开(公告)日：2020-09-10

    申请号：US16880652

    申请日：2020-05-21

    Applicant: HFI INNOVATION INC.

    Inventor： Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Chen SUN ,  Jing YE ,  Shan LIU ,  Xiaozhong XU ,  Jungsun KIM

    IPC: H04N19/593 ,  H04N19/70 ,  H04N19/463 ,  H04N19/426 ,  H04N19/93 ,  H04N19/159 ,  H04N19/176 ,  H04N19/44

    Abstract: A method of video coding with reduced implementation cost by reusing transform coefficient buffer palette for palette coding is disclosed. If the current prediction mode is an Intra prediction mode or the Inter prediction mode, information related to transform coefficients for prediction residual of the current block resulted from Intra prediction or Inter prediction is stored in the transform coefficient buffer. If the current prediction mode is the palette coding mode, information related to palette data associated with the current block is stored in the transform coefficient buffer. The current block is then encoded or decoded based on the information related to the transform coefficients if the current block is coded in the Intra prediction mode or the Inter prediction mode, or the information related to the palette data stored in the transform coefficient buffer if the current prediction mode is the palette coding mode.

    Methods of Palette Based Prediction for Non-444 Color Format in Video and Image Coding
    10.
    发明申请
    Methods of Palette Based Prediction for Non-444 Color Format in Video and Image Coding 审中-公开

    公开(公告)号：US20200007875A1

    公开(公告)日：2020-01-02

    申请号：US16567152

    申请日：2019-09-11

    Applicant: HFI Innovation Inc.

    Inventor： Shan LIU ,  Jing YE ,  Xiaozhong XU ,  Jungsun KIM ,  Wang-Lin LAI ,  Shaw-Min LEI

    IPC: H04N19/186 ,  H04N19/593 ,  H04N19/103 ,  H04N19/119

    Abstract: A method of video coding using palette coding mode for color video in a non-444 color format is disclosed. The non-444 video data can be converted to the 444 format so that the palette designed for the 444 format can be used for the non-444 video data. For the 4:2:0 color format, each chroma sample collocated with corresponding quad luma samples is padded with three chroma samples to form converted quad chroma samples. For the 4:2:0 color format, if a current pixel does not belong to the color palette, one or more escape values are signaled for the current pixel and the escape value associated with the chroma sample of the current pixel for each color component is not signaled for three of the quad chroma sample locations collocated with corresponding quad luma samples.

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