公开(公告)号：US11457237B2

公开(公告)日：2022-09-27

申请号：US16880652

申请日：2020-05-21

申请人： HFI INNOVATION INC.

发明人： Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Chen Sun ,  Jing Ye ,  Shan Liu ,  Xiaozhong Xu ,  Jungsun Kim

IPC分类号： H04N19/186 ,  H04N19/103 ,  H04N19/593 ,  H04N19/70 ,  H04N19/463 ,  H04N19/426 ,  H04N19/93 ,  H04N19/159 ,  H04N19/176 ,  H04N19/44

摘要： 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.

公开(公告)号：US10819990B2

公开(公告)日：2020-10-27

申请号：US15549478

申请日：2016-02-15

申请人： HFI Innovation Inc.

发明人： Shan Liu ,  Jing Ye ,  Tzu-Der Chuang

IPC分类号： H04N19/19 ,  H04N19/18 ,  H04N19/17 ,  H04N19/196 ,  H04N19/593 ,  H04N19/70 ,  H04N19/463 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186

摘要： A method and apparatus of palette predictor initialization for a coding system using palette coding are disclosed. A SPS predictor flag indicating whether SPS palette predictor values are present in a current SPS and a PPS predictor flag indicating whether SPS palette predictor values are present in a current PPS are used. According to the values of the SPS predictor flag and the PPS predictor flag, the current palette predictor array having a current predictor size for blocks in a picture corresponding to the current PPS is signaled at an encoder side or derived at a decoder side based on the PPS palette predictor values, the SPS palette predictor values or both.

公开(公告)号：US10397568B2

公开(公告)日：2019-08-27

申请号：US15549492

申请日：2016-02-16

申请人： HFI Innovation Inc.

发明人： Shan Liu ,  Jing Ye ,  Xiaozhong Xu

IPC分类号： H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/11 ,  H04N19/593 ,  H04N19/136 ,  H04N19/13 ,  H04N19/186 ,  H04N19/70

摘要： A method and apparatus of palette coding for video data having color formats including a monochrome format are disclosed. The system determines whether the video data is monochrome or non-monochrome. If the video data is monochrome, one or more single-component values corresponding to one or more palette coding parameters are parsed from or signaled in the video bitstream for a single color component of input monochrome video data. Palette decoding is then applied to the single color component of input monochrome video data using the palette coding parameters. If the video data is non-monochrome, one or more multi-component values corresponding to one or more palette coding parameters are parsed from or signaled in the video bitstream for multiple color components of input non-monochrome video data. Palette decoding is applied to the multiple color components of input non-monochrome video data using the palette coding parameters.

公开(公告)号：US11044479B2

公开(公告)日：2021-06-22

申请号：US16679650

申请日：2019-11-11

申请人： HFI Innovation Inc.

发明人： Tzu-Der Chuang ,  Jungsun Kim ,  Yu-Chen Sun ,  Wang-Lin Lai ,  Ching-Yeh Chen ,  Jing Ye ,  Shan Liu

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

摘要： 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.

公开(公告)号：US10904566B2

公开(公告)日：2021-01-26

申请号：US15556667

申请日：2016-03-17

申请人： HFI Innovation Inc.

发明人： Jing Ye ,  Tzu-Der Chuang ,  Shan Liu ,  Yu-Chen Sun

IPC分类号： H04N19/93 ,  H04N19/70 ,  H04N19/593 ,  H04N19/182 ,  H04N19/167 ,  H04N19/157 ,  H04N19/186

摘要： A method and apparatus of video coding using palette coding mode including run modes are disclosed. In one embodiment, the system determines a maximum palette run for a current pixel being coded based on coding information including block size of the current block, pixel location of the current pixel, and whether a last run type for the current block is the copy-index mode or the copy-above mode. The current run associated with the current pixel is then encoded into one or more binary strings or decoded from the bitstream according to the maximum palette run. A syntax element to indicate the last run type for the current block can be signaled or parsed from the bitstream.

公开(公告)号：US10681383B2

公开(公告)日：2020-06-09

申请号：US15563788

申请日：2016-04-08

申请人： HFI Innovation Inc.

发明人： Jing Ye ,  Jungsun Kim ,  Shan Liu ,  Kai Zhang ,  Tzu-Der Chuang ,  Weijia Zhu

IPC分类号： H04N19/70 ,  H04N19/91 ,  H04N19/463 ,  H04N19/593 ,  H04N19/13 ,  H04N19/176

摘要： 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.

公开(公告)号：US10666974B2

公开(公告)日：2020-05-26

申请号：US15524369

申请日：2015-11-12

申请人： HFI Innovation Inc.

发明人： Tzu-Der Chuang ,  Ching-Yeh Chen ,  Yu-Chen Sun ,  Jing Ye ,  Shan Liu ,  Xiaozhong Xu ,  Jungsun Kim

IPC分类号： H04N19/157 ,  H04N19/169 ,  H04N19/46 ,  H04N19/593 ,  H04N19/70 ,  H04N19/463 ,  H04N19/426 ,  H04N19/93 ,  H04N19/159 ,  H04N19/176 ,  H04N19/44

摘要： 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.

公开(公告)号：US10469848B2

公开(公告)日：2019-11-05

申请号：US15104654

申请日：2014-12-05

申请人： HFI Innovation Inc.

发明人： Wang-Lin Lai ,  Shan Liu ,  Tzu-Der Chuang ,  Xiaozhong Xu ,  Jing Ye

IPC分类号： H04N19/186 ,  H04N19/115 ,  H04N19/167 ,  H04N19/70 ,  H04N19/593 ,  H04N19/463 ,  H04N19/176 ,  H04N19/105 ,  H04N19/157

摘要： A method and apparatus for palette prediction and sharing according to the present invention are disclosed. A method incorporating an embodiment of the present invention determines one or more palette sharing flags for the current block. A set of current palettes corresponding to the set of color components is generated according to the palette sharing flags. If a first palette sharing flag is asserted, one or more current palettes indicated by the first palette sharing flag are copied entirely from one or more reference palettes of a set of reference palettes. If the first palette sharing flag is not asserted, one or more current palettes indicated by the first palette sharing flag are derived from a bitstream associated with the video data. Encoding or decoding is then applied to the current block according to the set of current palettes.

公开(公告)号：US10178412B2

公开(公告)日：2019-01-08

申请号：US15563811

申请日：2016-04-08

申请人： HFI Innovation Inc.

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

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

摘要： 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.

公开(公告)号：US10798392B2

公开(公告)日：2020-10-06

申请号：US16567152

申请日：2019-09-11

申请人： HFI Innovation Inc.

发明人： Shan Liu ,  Jing Ye ,  Xiaozhong Xu ,  Jungsun Kim ,  Wang-Lin Lai ,  Shaw-Min Lei

IPC分类号： G06K9/36 ,  H04N19/186 ,  H04N19/593 ,  H04N19/103 ,  H04N19/70 ,  H04N19/59 ,  H04N19/119 ,  H04N11/00

摘要： 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.