公开(公告)号：US10021418B2

公开(公告)日：2018-07-10

申请号：US15314474

申请日：2015-06-18

Applicant: HFI Innovation Inc.

Inventor： Wang-Lin Lai ,  Shan Liu ,  Yi-Wen Chen

IPC: H04N19/90 ,  H04N19/597 ,  H04N19/15 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96 ,  H04N19/174

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：US09681135B2

公开(公告)日：2017-06-13

申请号：US15123866

申请日：2015-03-13

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 ,  H04N19/154 ,  H04N19/94

CPC classification number: H04N19/11 ,  H04N1/644 ,  H04N19/105 ,  H04N19/154 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/197 ,  H04N19/426 ,  H04N19/463 ,  H04N19/593 ,  H04N19/94

Abstract: A method and apparatus for palette coding of a block of video data using a shared palette/palette prediction buffer are disclosed. The system receives a bitstream including compressed data associated with a current palette coded block and determines a palette predictor for the current palette coded block stored in a shared palette/palette predictor buffer. Reuse flags for entries of the current palette are used to update the current palette stored in the shared palette/palette predictor buffer. Any new signaled entry will be inserted to the shared palette/palette predictor buffer. An updated palette predictor for a next palette coded block is generated accordingly. A method of palette management and initialization for first palette-coded block in a high-level video structure is also disclosed. The high-level video structure may correspond to a slice, wavefront, sequence or picture.

公开(公告)号：US10798392B2

公开(公告)日：2020-10-06

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

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：US10764606B2

公开(公告)日：2020-09-01

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 ,  H04N19/463 ,  H04N19/91 ,  H04N19/593 ,  H04N19/176 ,  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：US10321141B2

公开(公告)日：2019-06-11

申请号：US15105136

申请日：2014-12-18

Applicant: HFI Innovation Inc.

Inventor： Tzu-Der Chuang ,  Wang-Lin Lai ,  Yu-Chen Sun ,  Shan Liu ,  Xiaozhong Xu ,  Yu-Wen Huang ,  Ding-Yun Chen

IPC: H04N7/12 ,  H04N19/196 ,  H04N19/105 ,  H04N19/176 ,  H04N19/593 ,  H04N19/436 ,  H04N19/13 ,  H04N19/167 ,  H04N19/186

Abstract: A method and apparatus for palette coding of a block of video data by initializing the palette or triplet palette or using a selected palette or triplet palette from a preceding image area for the beginning block of the current image area are disclosed. The method receives input data associated with a current image area consisting of multiple blocks. For the beginning block, the palette predictor is determined based on an initial palette or triplet palette or based on a selected palette or triplet palette associated with a selected block located at a location before the end of a preceding image area. For blocks of the current image area, palette coding is applied to the blocks, where at least one block uses the palette predictor for the beginning block as the palette predictor.

公开(公告)号：US09749628B2

公开(公告)日：2017-08-29

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 ,  H04N19/11 ,  H04N19/182 ,  H04N19/184

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.