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    Method of filter-unit based in-loop filtering
    1.
    发明授权
    Method of filter-unit based in-loop filtering 有权

    公开(公告)号：US10567751B2

    公开(公告)日：2020-02-18

    申请号：US15841645

    申请日：2017-12-14

    Applicant: HFI Innovation Inc.

    Inventor： Ching-Yeh Chen ,  Chih-Ming Fu ,  Chia-Yang Tsai ,  Yu-Wen Huang ,  Shaw-Min Lei

    IPC: H04N19/103 ,  H04N19/82 ,  H04N19/117 ,  H04N19/46 ,  H04N19/70

    Abstract: In one embodiment, a method receives a video bitstream corresponding to compressed video, wherein Filter Unit (FU) based in-loop filtering is allowed in a reconstruction loop associated with the compressed video. The method then derives reconstructed video from the video bitstream, wherein the reconstructed video is partitioned into FUs and derives a merge flag from the video bitstream for each of the FUs, wherein the merge flag indicates whether said each of the FUs is merged with a neighboring FU. The method further receives a merge index from the video bitstream if the merge flag indicates that said each of the FUs is merged, and receives the filter parameters from the video bitstream if the merge flag indicates that said each of the FUs is not merged. Finally, the method applies the in-loop filtering to said each of the FUs using the filter parameters.

    Method and apparatus for coding of sample adaptive offset information
    2.
    发明授权
    Method and apparatus for coding of sample adaptive offset information 有权

    公开(公告)号：US10116967B2

    公开(公告)日：2018-10-30

    申请号：US15297764

    申请日：2016-10-19

    Applicant: HFI Innovation Inc.

    Inventor： Chih-Ming Fu ,  Yu-Wen Huang ,  Chih-Wei Hsu ,  Shaw-Min Lei

    IPC: H04N7/12 ,  H04N19/70 ,  H04N19/91 ,  H04N19/44 ,  H04N19/13 ,  H04N19/86

    Abstract: A method and apparatus for Sample Adaptive Offset (SAO) processing of video data in a video decoder are disclosed. In an embodiment, the method includes receiving a block of processed-reconstructed pixels associated with a picture from a media or a processor, wherein the block of processed-reconstructed pixels are decoded from a video bitstream; determining a SAO type index from the video bitstream, wherein the SAO type index is decoded according to truncated unary binarization, the SAO type index is decoded using CABAC (context-based adaptive binary arithmetic coding) with one context, or the SAO type index is decoded by CABAC using a context mode for a first bin associated with the SAO type index and using a bypass mode for any remaining bin associated with the SAO type index; and applying SAO processing to the block of processed-reconstructed pixels based on SAO information including the SAO type index.

    Method and apparatus for coding of sample adaptive offset information
    4.
    发明授权
    Method and apparatus for coding of sample adaptive offset information 有权

    公开(公告)号：US09942571B2

    公开(公告)日：2018-04-10

    申请号：US14403186

    申请日：2013-04-02

    Applicant: HFI Innovation Inc.

    Inventor： Chih-Ming Fu ,  Yu-Wen Huang ,  Chih-Wei Hsu ,  Shaw-Min Lei

    IPC: H04N7/12 ,  H04N19/70 ,  H04N19/91 ,  H04N19/44 ,  H04N19/13 ,  H04N19/86

    CPC classification number: H04N19/70 ,  H04N19/13 ,  H04N19/44 ,  H04N19/86 ,  H04N19/91

    Abstract: A method and apparatus for sharing context among different SAO syntax elements for a video coder are disclosed. Embodiments of the present invention apply CABAC coding to multiple SAO syntax elements according to a joint context model, wherein the multiple SAO syntax elements share the joint context. The multiple SAO syntax elements may correspond to SAO merge left flag and SAO merge up flag. The multiple SAO syntax elements may correspond to SAO merge left flags or merge up flags associated with different color components. The joint context model can be derived based on joint statistics of the multiple SAO syntax elements. Embodiments of the present invention code the SAO type index using truncated unary binarization, using CABAC with only one context, or using CABAC with context mode for the first bin associated with the SAO type index and with bypass mode for any remaining bin.

    Motion prediction method
    5.
    发明授权
    Motion prediction method 有权

    公开(公告)号：US09729897B2

    公开(公告)日：2017-08-08

    申请号：US14688173

    申请日：2015-04-16

    Applicant: HFI INNOVATION INC.

    Inventor： Yu-Pao Tsai ,  Chih-Ming Fu ,  Jian-Liang Lin ,  Yu-Wen Huang ,  Shaw-Min Lei

    IPC: H04N19/172 ,  H04N19/513 ,  H04N19/56

    CPC classification number: H04N19/56 ,  H04N19/172 ,  H04N19/513

    Abstract: The invention provides a motion prediction method. First, a plurality of candidate units corresponding to a current unit of a current frame is determined. A plurality of motion vectors of the candidate units is then obtained. A plurality of scaling factors of the candidate units is then calculated according to a plurality of respective temporal distances depending on a plurality of reference frames of the motion vectors. The motion vectors of the candidate units are then scaled according to the scaling factors to obtain a plurality of scaled motion vectors. The scaled motion vectors are ranked, and a subset of highest ranking motion vectors are identified to be included in a candidate set. Finally, a motion vector predictor for motion prediction of the current unit is then selected from the candidate units.

    Apparatus and method of sample adaptive offset for luma and chroma components
    7.
    发明授权
    Apparatus and method of sample adaptive offset for luma and chroma components 有权

    公开(公告)号：US10405004B2

    公开(公告)日：2019-09-03

    申请号：US15015537

    申请日：2016-02-04

    Applicant: HFI Innovation Inc.

    Inventor： Chih-Ming Fu ,  Ching-Yeh Chen ,  Chia-Yang Tsai ,  Yu-Wen Huang ,  Shaw-Min Lei

    IPC: H04N19/82 ,  H04N19/157 ,  H04N19/186 ,  H04N19/176 ,  H04N19/463 ,  H04N19/96 ,  H04N19/132 ,  H04N19/117 ,  H04N19/196 ,  H04N19/70

    Abstract: A method and apparatus for processing reconstructed video using in-loop filter in a video coding system are disclosed. The method uses chroma in-loop filter indication to indicate whether chroma components are processed by in-loop filter when the luma in-loop filter indication indicates that in-loop filter processing is applied to the luma component. An additional flag may be used to indicate whether the in-loop filter processing is applied to an entire picture using same in-loop filter information or each block of the picture using individual in-loop filter information. Various embodiments according to the present invention to increase efficiency are disclosed, wherein various aspects of in-loop filter information are taken into consideration for efficient coding such as the property of quadtree-based partition, boundary conditions of a block, in-loop filter information sharing between luma and chroma components, indexing to a set of in-loop filter information, and prediction of in-loop filter information.

    Method and apparatus for loop filtering across slice or tile boundaries
    9.
    发明授权
    Method and apparatus for loop filtering across slice or tile boundaries 有权

    公开(公告)号：US10511843B2

    公开(公告)日：2019-12-17

    申请号：US14380710

    申请日：2013-02-22

    Applicant: HFI Innovation Inc.

    Inventor： Chih-Ming Fu ,  Chia-Yang Tsai ,  Chih-Wei Hsu ,  Ching-Yeh Chen ,  Yu-Wen Huang ,  Shaw-Min Lei

    IPC: H04N19/176 ,  H04N19/117 ,  H04N19/174 ,  H04N19/82 ,  H04N19/167

    Abstract: A method and apparatus for loop filter processing of video data in a video encoder or decoder are disclosed. Embodiments according to the present invention conditionally allow sharing of loop filter parameters. In one embodiment, sharing of loop filter information between the current block and a neighboring block is determined according to a condition. If the condition indicates that sharing of loop filter information is allowed, a merge flag is coded and incorporated in the video bitstream in an encoder, and a merge flag is parsed from the video bitstream and decoded in a decoder. In one embodiment, the condition depends on region partitioning of the picture, where region partitioning partitions the picture into regions and the region may correspond to a slice or a tile. The condition is set to indicate that sharing of loop filter information is allowed if the block and the neighboring block are in a same slice/tile.

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