公开(公告)号：US09641837B2

公开(公告)日：2017-05-02

申请号：US14353025

申请日：2012-11-07

Applicant: HFI Innovation Inc.

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

IPC: H04N19/42 ,  H04N19/513 ,  H04N19/52 ,  H04N19/51 ,  H04N19/58 ,  H04N19/567

CPC classification number: H04N19/52 ,  H04N19/105 ,  H04N19/172 ,  H04N19/176 ,  H04N19/42 ,  H04N19/513 ,  H04N19/567 ,  H04N19/58 ,  H04N19/91

Abstract: A method and apparatus for deriving a scaled MV (motion vector) for a current block based on a candidate MV associated with a candidate block are disclosed. Embodiments according to the present invention increase effective scaling factor of motion vector scaling. In one embodiment, a distance ratio of a first picture distance between a current picture and a target reference picture pointed to by a current motion vector of the current block to a second picture distance between a candidate picture corresponding to the candidate block and a candidate reference picture pointed to by the candidate MV is computed. The scaled MV is then generated based on the candidate MV according to the distance ratio, where the scaled MV has an effective scaling ratio between −m and n, and wherein m and n are positive integers greater than 4. The values of m and n can be 8, 16 or 32.

公开(公告)号：US10743031B2

公开(公告)日：2020-08-11

申请号：US15107913

申请日：2014-12-26

Applicant: HFI Innovation Inc.

Inventor： Tzu-Der Chuang ,  Yu-Chen Sun ,  Yi-Wen Chen ,  Yu-Wen Huang

IPC: H04N19/70 ,  H04N19/186 ,  H04N19/91 ,  H04N19/56 ,  H04N19/52 ,  H04N19/463 ,  H04N19/48 ,  H04N19/93 ,  H04N19/593 ,  H04N19/105 ,  H04N19/159 ,  H04N19/182

Abstract: A method and apparatus for palette coding of a block of video data using a candidate prediction mode list with syntax redundancy removed are disclosed. In one embodiment, whether a redundant prediction mode exists in the candidate prediction mode list for the current samples of the current block is determined based on the candidate prediction mode list and the previous prediction mode associated with the previous samples. If the redundant prediction mode exists in the candidate prediction mode list, the redundant prediction mode is removed from the candidate prediction mode list to generate a reduced candidate prediction mode list. In another embodiment, whether a redundant predictor exists in a candidate predictor list for a current sample of the current block is determined based on a condition related to one or more predictors for the current sample of the current block.

公开(公告)号：US10554979B2

公开(公告)日：2020-02-04

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 ,  H04N19/11 ,  H04N19/182 ,  H04N19/105 ,  H04N19/184 ,  H04N19/176

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.

公开(公告)号：US10477183B2

公开(公告)日：2019-11-12

申请号：US14779655

申请日：2014-07-18

Applicant: HFI Innovation Inc.

Inventor： Yu-Lin Chang ,  Yi-Wen Chen ,  Jian-Liang Lin

IPC: H04N13/172 ,  H04N13/178 ,  H04N13/10 ,  H04N19/46 ,  H04N19/597 ,  H04N19/176 ,  H04N19/187 ,  H04N19/513 ,  H04N19/30

Abstract: A method of three-dimensional video encoding and decoding that adaptively incorporates camera parameters in the video bitstream according to a control flag is disclosed. The control flag is derived based on a combination of individual control flags associated with multiple depth-oriented coding tools. Another control flag can be incorporated in the video bitstream to indicate whether there is a need for the camera parameters for the current layer. In another embodiment, a first flag and a second flag are used to adaptively control the presence and location of camera parameters for each layer or each view in the video bitstream. The first flag indicates whether camera parameters for each layer or view are present in the video bitstream. The second flag indicates camera parameter location for each layer or view in the video bitstream.

公开(公告)号：US10349083B2

公开(公告)日：2019-07-09

申请号：US15121142

申请日：2015-03-17

Applicant: HFI Innovation Inc.

Inventor： Yi-Wen Chen ,  Kai Zhang ,  Jian-Liang Lin ,  Yu-Wen Huang

IPC: H04N19/597 ,  H04N19/105 ,  H04N19/176 ,  H04N19/46 ,  H04N19/136 ,  H04N19/174

Abstract: A method and apparatus for low-latency illumination compensation in a three-dimensional (3D) and multi-view coding system are disclosed. According to the present invention, the encoder determines whether to enable or disable the illumination compensation for the current picture or slice based on a condition related to statistic associated with a selected reference picture or slice respectively, or related to high-level coding information associated with the current picture or slice respectively. The high-level coding information associated with the current picture or slice excludes any information related to pixel values of the current picture or slice respectively. The illumination compensation is them applied according to the decision made by the encoder. A similar low-latency method is also applied for depth lookup table (DLT) based coding.

公开(公告)号：US10116964B2

公开(公告)日：2018-10-30

申请号：US14517787

申请日：2014-10-17

Applicant: HFI INNOVATION INC.

Inventor： Jicheng An ,  Kai Zhang ,  Yi-Wen Chen ,  Jian-Liang Lin

IPC: H04N13/00 ,  H04N19/51 ,  H04N19/597 ,  H04N13/128 ,  H04N13/161

Abstract: A method for a three-dimensional encoding or decoding system incorporating restricted sub-PU level prediction is disclosed. In one embodiment, the sub-PU level prediction associated with inter-view motion prediction or view synthesis prediction is restricted to the uni-prediction. In another embodiment, the sub-PU partition associated with inter-view motion prediction or view synthesis prediction is disabled if the sub-PU partition would result in sub-PU size smaller than the minimum PU split size or the PU belongs to a restricted partition group. The minimum PU split size may correspond to 8×8. The restricted partition group may correspond to one or more asymmetric motion partition (AMP) modes.

公开(公告)号：US10075692B2

公开(公告)日：2018-09-11

申请号：US14993372

申请日：2016-01-12

Applicant: HFI Innovation Inc.

Inventor： Yi-Wen Chen ,  Jian-Liang Lin

IPC: H04N19/176 ,  H04N19/593 ,  H04N19/597 ,  H04N19/105 ,  H04N19/503 ,  H04N13/00 ,  H04N19/11 ,  H04N19/463

CPC classification number: H04N13/161 ,  H04N13/194 ,  H04N19/11 ,  H04N19/176 ,  H04N19/463 ,  H04N19/593 ,  H04N19/597

Abstract: A method and apparatus for video coding of a block of depth data or texture data using a simple Intra mode is disclosed. The method determines a prediction process selected from a prediction process list for the current block, where the prediction process list comprises at least a single sample mode and at least a simplified Intra prediction mode. If the prediction process selected for the current block corresponds to one single sample mode, encoding or decoding the current block using a single sample value derived from one or more previously decoded pixels for a whole current block. If the prediction process selected for the current block corresponds to one simplified Intra prediction mode, encoding or decoding the current block using Intra prediction signal derived according to a corresponding Intra prediction mode with no residual coding for the current block.

公开(公告)号：US09998760B2

公开(公告)日：2018-06-12

申请号：US14442937

申请日：2013-11-15

Applicant: HFI Innovation Inc.

Inventor： Yi-Wen Chen ,  Jian-Liang Lin

IPC: H04N19/597 ,  H04N19/176 ,  H04N19/52 ,  H04N13/00

CPC classification number: H04N19/597 ,  H04N13/161 ,  H04N19/176 ,  H04N19/52

Abstract: A method and apparatus for three-dimensional video encoding or decoding with conditionally constrained disparity vector are disclosed. In one embodiment, a derived DV (disparity vector) for the current texture block is determined and DV constraint is applied or is not applied to the derived DV to obtain a final derived DV. Inter-view predictive encoding or decoding is then applied to the input data utilizing at least one of selected coding tools, wherein a same final derived DV is used by all selected coding tools, and the selected coding tools comprise inter-view residual prediction, view synthesis prediction and inter-view motion parameter prediction.

公开(公告)号：US09860552B2

公开(公告)日：2018-01-02

申请号：US15053207

申请日：2016-02-25

Applicant: HFI Innovation Inc.

Inventor： Jian-Liang Lin ,  Yi-Wen Chen ,  Yu-Pao Tsai ,  Yu-Wen Huang ,  Shaw-Min Lei

IPC: H04N19/52 ,  H04N19/56 ,  H04N19/533

CPC classification number: H04N19/52 ,  H04N19/533 ,  H04N19/56

Abstract: A method for deriving a motion vector predictor (MVP) receives motion vectors (MVs) associated with reference blocks of the current block. The method determines at least one first spatial search MV associated with a first MV searching order and at least one second spatial search MV associated with a second MV searching order for each neighboring reference block. Then, the method determines whether a first available-first spatial search MV exists for said at least one neighboring reference block according to the first MV searching order, and provides the first available-first spatial search MV as a spatial MVP for the current block. Finally, the method determines whether a first available-second spatial search MV exists for said at least one neighboring reference block according to the second MV searching order only if none of first spatial search MVs for said at least one neighboring reference block is available.

公开(公告)号：US09854268B2

公开(公告)日：2017-12-26

申请号：US14433356

申请日：2013-09-18

Applicant: HFI Innovation Inc.

Inventor： Yi-Wen Chen ,  Jian-Liang Lin ,  Yu-Wen Huang

IPC: H04N7/12 ,  H04N19/597 ,  H04N19/426 ,  H04N19/13 ,  H04N19/15 ,  H04N19/176 ,  H04N19/115 ,  H04N19/513 ,  H04N19/33

CPC classification number: H04N19/597 ,  H04N19/115 ,  H04N19/13 ,  H04N19/15 ,  H04N19/176 ,  H04N19/33 ,  H04N19/426 ,  H04N19/428 ,  H04N19/513

Abstract: A method and apparatus for three-dimensional video coding, multi-view video coding and scalable video coding are disclosed. Embodiments of the present invention use two stage motion data compression to reduce motion data buffer requirement. A first-stage motion data compression is applied after each texture picture or depth map is coded to reduce motion data buffer requirement. Accordingly, first compressed motion data is stored in reduced resolution in the buffer to reduce storage requirement and the first compressed motion data is used for coding process of other texture pictures or depth maps in the same access unit. After all pictures in an access unit are coded, motion data associated with the access unit is further compressed and the second compressed motion data is used during coding process of pictures in other access unit.