公开(公告)号：US09924181B2

公开(公告)日：2018-03-20

申请号：US14406529

申请日：2013-06-13

Applicant: HFI Innovation Inc.

Inventor： Tzu-Der Chuang ,  Yu-Wen Huang ,  Ching-Yeh Chen ,  Chia-Yang Tsai ,  Chih-Ming Fu ,  Shih-Ta Hsiang

IPC: H04N19/30 ,  H04N19/31 ,  H04N19/587 ,  H04N19/52 ,  H04N19/50 ,  H04N19/59 ,  H04N19/33 ,  H04N19/593 ,  H04N19/51 ,  H04N19/36

CPC classification number: H04N19/30 ,  H04N19/31 ,  H04N19/33 ,  H04N19/36 ,  H04N19/50 ,  H04N19/51 ,  H04N19/52 ,  H04N19/587 ,  H04N19/59 ,  H04N19/593

Abstract: A method and apparatus for inter-layer prediction for scalable video coding are disclosed. Embodiments of the present invention utilize weighted prediction for scalable coding. The weighted prediction is based on the predicted texture data and the inter-layer Intra prediction data derived from BL reconstructed data. The inter-layer Intra prediction data corresponds to the BL reconstructed data or up-sampled BL reconstructed data. The predicted texture data corresponds to spatial Intra prediction data or motion-compensated prediction data based on the second EL video data in the same layer as the current EL picture. Embodiments of the present invention also utilize the reference picture list including an inter-layer reference picture (ILRP) corresponding to BL reconstructed texture frame or up-sampled BL reconstructed texture frame for Inter prediction of EL video data. The motion vector is limited to a range around (0,0) when the ILRP is selected as a reference picture.

公开(公告)号：US11778235B2

公开(公告)日：2023-10-03

申请号：US17717966

申请日：2022-04-11

Applicant: HFI INNOVATION INC.

Inventor： Shih-Ta Hsiang ,  Lulin Chen ,  Tzu-Der Chuang ,  Chih-Wei Hsu ,  Ching-Yeh Chen ,  Olena Chubach ,  Yu-Wen Huang

IPC: H04N19/70 ,  H04N19/105 ,  H04N19/124 ,  H04N19/176 ,  H04N19/12

CPC classification number: H04N19/70 ,  H04N19/105 ,  H04N19/124 ,  H04N19/176

Abstract: A method for performing transform skip mode (TSM) in a video decoder is provided. A video decoder receives data from a bitstream to be decoded as a plurality of video pictures. The video decoder parses the bitstream for a first syntax element in a sequence parameter set (SPS) of a current sequence of video pictures. When the first syntax element indicates that transform skip mode is allowed for the current sequence of video pictures and when transform skip mode is used for a current block in a current picture of the current sequence, the video decoder reconstructs the current block by using quantized residual signals that are not transformed.

公开(公告)号：US11750841B2

公开(公告)日：2023-09-05

申请号：US17973600

申请日：2022-10-26

Applicant: HFI INNOVATION INC.

Inventor： Shih-Ta Hsiang

IPC: H04N19/60 ,  H04N19/13 ,  H04N19/176

CPC classification number: H04N19/60 ,  H04N19/13 ,  H04N19/176

Abstract: Video processing methods and apparatuses in a video encoding or decoding system for processing residual data of transform blocks. A current transform block in a video picture is divided into multiple sub-blocks, and each sub-block in the current transform block is entropy encoded or decoded using multiple sub-block coding passes. Each transform coefficient level in each sub-block is visited once according to a pre-defined scanning order in each sub-block coding pass. Two or more syntax elements associated with transform coefficient levels in the current transform block are aggregated and coded in one single sub-block coding pass. The video processing method is applied if the current transform block contains at least one non-zero transform coefficient level and the current transform block is coded in Transform Skip Mode (TSM) according to some embodiments.

公开(公告)号：US10382759B2

公开(公告)日：2019-08-13

申请号：US15314645

申请日：2015-06-18

Applicant: HFI Innovation Inc.

Inventor： Shih-Ta Hsiang ,  Tzu-Der Chuang

IPC: H04N19/13 ,  H04N19/70 ,  H04N19/91

Abstract: A method and apparatus for entropy coding and decoding for source symbols generated in a video coding system are disclosed. According to the present invention, a MSB (most significant bit) index and any refinement bit for the current symbol value are determined first. A first binary string is generated by binarizing a prefix part related to the MSB index of the current symbol value using a unary code or a truncated unary code. Also, a second binary string is generated by binarizing a suffix part corresponding to one or more refinement bits of the current symbol value using a fixed-length code or a truncated binary code if any refinement bit exists. The first binary string is coded using CABAC (context-adaptive binary arithmetic coding) and the second binary string is also coded using the CABAC if the second binary string exists.

公开(公告)号：US10237557B2

公开(公告)日：2019-03-19

申请号：US15175444

申请日：2016-06-07

Applicant: HFI Innovation Inc.

Inventor： Shih-Ta Hsiang

IPC: H04N19/13 ,  H04N19/51 ,  H04N19/176 ,  H04N19/70 ,  H04N19/124

Abstract: Methods and apparatus of palette coding based on a palette predictor in a video coding system are disclosed. A set of run lengths associated with re-use flags of a current palette with respect to a palette predictor is determined and the set of run lengths includes an Escape code to indicate an end of run length coding for the re-use flags of the current palette. A set of code values is determined for the set of run lengths by adaptively assigning an Escape code value to the Escape code depending on a current index of predictor run length coding. The set of run lengths is then encoded or decoded according to the set of code values. According to another method, a context model is determined for at least a portion of the binary string depending on current coding information, previous coding information or both.

公开(公告)号：US11805279B2

公开(公告)日：2023-10-31

申请号：US17829730

申请日：2022-06-01

Applicant: HFI Innovation Inc.

Inventor： Shih-Ta Hsiang

IPC: H04N19/70 ,  H04N19/124 ,  H04N19/176 ,  H04N19/50 ,  H04N19/60

CPC classification number: H04N19/70 ,  H04N19/124 ,  H04N19/176 ,  H04N19/50 ,  H04N19/60

Abstract: A method and apparatus for decoding prediction residues in a video coding system operate by receiving input data associated with a current residual block, wherein the input data correspond to coded quantized-transform coefficients associated with the current residual block to be decoded at a decoder side, and wherein the current residual block is divided into one or more sub-blocks. This method further signals a plurality of syntax elements representing coded quantized transform coefficients at the encoder side or parsing the plurality of syntax elements representing the coded quantized transform coefficients at the decoder side, wherein at least two of the plurality of syntax elements are coded in a CABAC regular mode and all syntax elements coded in the CABAC regular mode are signalled or parsed in one coding pass. The method further encodes or decodes the current residual block according to the plurality of syntax elements.

公开(公告)号：US11792388B2

公开(公告)日：2023-10-17

申请号：US17716037

申请日：2022-04-08

Applicant: HFI Innovation Inc.

Inventor： Shih-Ta Hsiang

IPC: H04N19/103 ,  H04N19/172 ,  H04N19/70 ,  H04N19/61 ,  H04N19/176

CPC classification number: H04N19/103 ,  H04N19/172 ,  H04N19/176 ,  H04N19/70

Abstract: Video processing methods and apparatuses in a video coding system include receiving input video data of a current block in a current picture, determining whether a transform skip mode is enabled for the current picture, signaling or parsing a syntax element associated with a size constraint for enabling the transform skip mode in a SPS referred to by the current picture when the transform skip mode is enabled, determining whether the transform skip mode is applied to the current block when the current block satisfies the size constraint, processing residues of the current block according to the transform skip mode when the transform skip mode is applied to the current block, and encoding or decoding the current block. An enabling flag is signaled in a high-level syntax set or parsed from the high-level syntax set to determine whether the transform skip mode is enabled for the current picture.

公开(公告)号：US10659817B2

公开(公告)日：2020-05-19

申请号：US14889406

申请日：2014-07-15

Applicant: HFI Innovation Inc.

Inventor： Shih-Ta Hsiang ,  Yu-Wen Huang

IPC: H04N19/82 ,  H04N19/46 ,  H04N19/10 ,  H04N19/70 ,  H04N19/147 ,  H04N19/91 ,  H04N19/117 ,  H04N19/182 ,  H04N19/567 ,  H04N19/86

Abstract: A method of modified SAO (sample-adaptive offset) processing for a reconstructed picture in a video coding system to improve the performance is disclosed. In one example, a SAO-sign threshold is introduced to determine the sign of the difference between a current reconstructed pixel and a neighboring reconstructed pixel. A range of difference values greater than the negative SAO-sign threshold and smaller than the positive SAO-sign threshold is assigned to have a sign value of 0. In another example, the SAO-offset value is derived by multiplying the SAO-offset sign with a result from applying left shift by the SAO-bit-shift value to the absolute SAO-offset value. In yet another example, the absolute SAO-offset value is coded by truncated Rice (TR) codes and a maximum TR value is indicated by a syntax element.

公开(公告)号：US12015802B2

公开(公告)日：2024-06-18

申请号：US17906777

申请日：2021-04-01

Applicant: HFI Innovation Inc.

Inventor： Shih-Ta Hsiang

IPC: H04N19/82 ,  H04N19/172 ,  H04N19/70

CPC classification number: H04N19/82 ,  H04N19/172 ,  H04N19/70

Abstract: A method and apparatus for signaling or parsing picture partition information are disclosed. The current picture is partitioned into one or more slices and one or more tiles according to the picture partition information. A control syntax is determined, where the control syntax is signaled from the video bitstream at the encoder side or parsed from the video bitstream at the decoder side unless the picture partition information indicates that a rectangular slice mode is selected, each sub picture is allowed to contain more than one rectangular slice, and the current picture contains only one rectangular slice in the current picture. In-loop filtering is applied across slice boundaries if the picture partition information indicates multiple slices existing in the current picture and the control syntax indicates the in-loop filtering being enabled.

公开(公告)号：US11924426B2

公开(公告)日：2024-03-05

申请号：US18158144

申请日：2023-01-23

Applicant: HFI INNOVATION INC.

Inventor： Shih-Ta Hsiang ,  Chen-Yen Lai ,  Ching-Yeh Chen

IPC: H04N11/02 ,  H04N19/119 ,  H04N19/176 ,  H04N19/184 ,  H04N19/44 ,  H04N19/96

CPC classification number: H04N19/119 ,  H04N19/176 ,  H04N19/184 ,  H04N19/44 ,  H04N19/96

Abstract: A video system that applies constraints on block partitioning is provided. The system receives a partitioning control parameter from a bitstream specifying a maximum block size for enabling ternary-tree split that is constrained to be 64 or smaller. The system receives data from a bitstream for a block of pixels to be decoded as a current block of a current picture of a video. The system splits the current block into one or more partitions recursively, wherein ternary split is disallowed for a partition of the current block unless the partition is less than or equal to the maximum block size. The system reconstructs the one or more partitions of the current block.