公开(公告)号：US20200304783A1

公开(公告)日：2020-09-24

申请号：US16898532

申请日：2020-06-11

Applicant: HFI Innovation Inc.

Inventor： Wang-Lin LAI ,  Yu-Chen SUN ,  Shan LIU ,  Xiaozhong XU ,  Tzu-Der CHUANG ,  Ding-Yun CHEN ,  Yu-Wen HUANG

IPC: H04N19/11 ,  H04N1/64 ,  H04N19/176 ,  H04N19/593 ,  H04N19/463 ,  H04N19/186 ,  H04N19/159 ,  H04N19/426 ,  H04N19/105 ,  H04N19/196 ,  H04N19/154 ,  H04N19/94

Abstract: A method of palette management for palette coding in a video coding system receives input data associated with a current block in a high-level picture structure and initializes a palette predictor in the high-level picture structure before a corresponding palette of a first palette-coded block in the high-level picture structure is coded. If a palette mode is selected for the current block, the method applies the palette coding to the current block using a current palette and updates the palette predictor based on the current palette to generate an updated palette predictor for a next block coded in the palette mode.

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.

公开(公告)号：US20190089986A1

公开(公告)日：2019-03-21

申请号：US16197412

申请日：2018-11-21

Applicant: HFI Innovation Inc.

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

IPC: H04N19/70 ,  H04N19/176 ,  H04N19/91 ,  H04N19/463 ,  H04N19/186

Abstract: An apparatus and method of coding a palette table using a palette predictor list operate by receiving input data associated with a current block in a picture, receiving a current palette for a current block in the picture, and receiving the palette predictor list for the current palette. For a current position of the palette predictor list, the operations determine a current palette predictor run, wherein a distance between the current position of the palette predictor list and a next position of a next palette entry of the palette predictor list corresponds to the current palette predictor run. Further, the operation constrains a syntax element representing the current palette predictor run to a range of values to cause the next palette entry of the palette predictor list to be within the palette predictor list, and signal or parse the syntax element in a bitstream for the current block.

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.

公开(公告)号：US20170374372A1

公开(公告)日：2017-12-28

申请号：US15534534

申请日：2015-12-16

Applicant: HFI Innovation Inc.

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

IPC: H04N19/186 ,  H04N19/119 ,  H04N19/593 ,  H04N19/103 ,  H04N11/00

CPC classification number: H04N19/186 ,  H04N11/00 ,  H04N19/103 ,  H04N19/119 ,  H04N19/59 ,  H04N19/593 ,  H04N19/70

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.

公开(公告)号：US20170257630A1

公开(公告)日：2017-09-07

申请号：US15598454

申请日：2017-05-18

Applicant: HFI Innovation Inc.

Inventor： Wang-Lin LAI ,  Yu-Chen SUN ,  Shan LIU ,  Xiaozhong XU ,  Tzu-Der CHUANG ,  Ding-Yun CHEN ,  Yu-Wen HUANG

IPC: H04N19/11 ,  H04N19/176 ,  H04N19/593 ,  H04N19/463 ,  H04N19/186 ,  H04N19/154 ,  H04N1/64 ,  H04N19/94

Abstract: A method of palette management for palette coding in a video coding system receives input data associated with a current block in a high-level picture structure and initializes a palette predictor in the high-level picture structure before a corresponding palette of a first palette-coded block in the high-level picture structure is coded. If a palette mode is selected for the current block, the method applies the palette coding to the current block using a current palette and updates the palette predictor based on the current palette to generate an updated palette predictor for a next block coded in the palette mode.

公开(公告)号：US20170134724A1

公开(公告)日：2017-05-11

申请号：US15318428

申请日：2015-07-07

Applicant: HFI Innovation Inc.

Inventor： Shan LIU ,  Wang-Lin LAI ,  Tzu-Der CHUANG ,  Ching-Yeh CHEN ,  Yu-Wen HUANG ,  Chih-Wei HSU ,  Xiaozhong XU

IPC: H04N19/105 ,  H04N19/70 ,  H04N19/176 ,  H04N19/11 ,  H04N19/174

CPC classification number: H04N19/105 ,  H04N19/11 ,  H04N19/13 ,  H04N19/159 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/436 ,  H04N19/513 ,  H04N19/70

Abstract: A method of IntraBC coding using restricted reference area is disclosed. A reference block is selected from an available ladder-shaped reference area comprising previously processed blocks before the current working block in the current CTU row and previously processed blocks in one or more previous CTU rows. A location of a last previously processed block of a second previous CTU row that is one CTU row farther away from the current CTU row than a first previous CTU row is always in a same vertical location or after a same vertical position of a last previously processed block of the first previous CTU row. The current picture may be partitioned into multiple CTU rows for applying wavefront parallel processing (WPP) on the multiple CTU rows, where the current working block corresponds to a current working block. Similar restrictions may also be applied to slice/tile-based parallel processing.

公开(公告)号：US20170127086A1

公开(公告)日：2017-05-04

申请号：US15314474

申请日：2015-06-18

Applicant: HFI Innovation Inc.

Inventor： Wang-Lin LAI ,  Shan LIU ,  Yi-Wen CHEN

IPC: H04N19/597 ,  H04N19/15

CPC classification number: H04N19/597 ,  H04N19/105 ,  H04N19/15 ,  H04N19/174 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70 ,  H04N19/90 ,  H04N19/96

Abstract: A method and apparatus of video coding for a block of depth data or texture data coded in SSM (Single Sample Mode) are disclosed. Embodiments according to the present invention construct a sample candidate list comprising one or more single color candidates corresponding to one or more representative samples of one or more previous SSM-coded blocks, or one or more palette color candidates corresponding to one or more previously used colors in one or more previous palettes associated with one or more palette-coded blocks, or both. A selected sample candidate is then determined from the sample candidate list and the selected sample candidate is used to encode or decode the current block by representing the whole current block by this selected sample candidate. Spatial and/or temporal candidates from previously SSM-coded blocks can also be included in the sample candidate list.

公开(公告)号：US20170195676A1

公开(公告)日：2017-07-06

申请号：US15316609

申请日：2015-06-19

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 ,  H04N19/176 ,  H04N19/593 ,  H04N19/11 ,  H04N19/44 ,  H04N19/122 ,  H04N19/625 ,  H04N19/103 ,  H04N19/426

CPC classification number: H04N19/157 ,  H04N19/103 ,  H04N19/11 ,  H04N19/122 ,  H04N19/176 ,  H04N19/426 ,  H04N19/44 ,  H04N19/593 ,  H04N19/625

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.

公开(公告)号：US20170134725A1

公开(公告)日：2017-05-11

申请号：US15321769

申请日：2015-07-07

Applicant: HFI Innovation Inc.

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

IPC: H04N19/105 ,  H04N19/184 ,  H04N19/11 ,  H04N19/182

CPC classification number: H04N19/157 ,  H04N19/105 ,  H04N19/11 ,  H04N19/176 ,  H04N19/182 ,  H04N19/184 ,  H04N19/50 ,  H04N19/593 ,  H04N19/70 ,  H04N19/85

Abstract: Methods to overcome issues associated with predictors being an Escape pixel in palette coding using a copy mode are disclosed. According to one embodiment, if the predictor for a copy-above mode is an Escape pixel, the pixel value of the current Escape pixel is transmitted so that it can be reconstructed using the transmitted pixel value. In another embodiment, restriction is applied to the encoder side, where in the copy-above mode, the copy-above run is terminated or the copy-above mode is not selected for the current pixel whenever an above pixel located above a current pixel is an Escape pixel. In yet another embodiment, directly copying the Escape value is used, where both the Escape index and Escape value, or the reconstructed pixel value of the predictor is directly copied to reconstruct a current pixel when the predictor is an Escape pixel.