Transform Patents (Class 375/240.18)
  • Patent number: 12008964
    Abstract: A display device includes pixels, an image converter which generates a second image by correcting grayscales of a first logo in a first image for the pixels, and a data driver which provides data signals corresponding to the second image to the pixels. The image converter detects the first logo based on value and saturation of the first image, generates first map data corresponding to the first logo, and specifies pixels corresponding to the first logo based on the first map data.
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: June 11, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Byung Ki Chun, Hyeon Min Kim, Young Wook Yoo, Jun Gyu Lee, Hyun Jun Lim
  • Patent number: 12010342
    Abstract: Embodiments in the present specification provide a method and device for processing video signal including steps of: obtaining a sub-block transform (SBT) flag indicating whether a SBT is applied, wherein the SBT represents a transform applied to a transform unit corresponding to one of subblocks split from a coding unit; determining a variable value related to a transform target region based on the SBT flag and a size value of the transform unit, wherein if the SBT flag equals to 1 and the size value is greater than a threshold value, the variable value is determined as the threshold value; obtaining position information of a last significant coefficient according to a scan order within the transform unit, wherein the position information of the last significant coefficient is coded based on the variable value; and performing an inverse-transform based on the position information of the last significant coefficient.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: June 11, 2024
    Assignee: LG ELECTRONICS INC.
    Inventors: Moonmo Koo, Jaehyun Lim, Seunghwan Kim, Mehdi Salehifar
  • Patent number: 12010300
    Abstract: An encoding method and decoding method, and a device implementing the same are provided. The encoding method obtains an intra prediction mode related to a current block from a video signal, obtains prediction samples of the current block by performing intra prediction on the current block based on the intra prediction mode, scans transform coefficients of the current block based on a scanning type of the current block, obtains dequantized transform coefficients of the current block by dequantizing the transform coefficients, obtains residual samples of the current block by performing an inverse-transform on the dequantized transform coefficients, the inverse-transform being performed in a horizontal direction and a vertical direction, reconstructs the current block using the residual samples and the prediction samples, and applies a deblocking filter on the reconstructed current block.
    Type: Grant
    Filed: March 28, 2023
    Date of Patent: June 11, 2024
    Assignees: Electronics and Telecommunications Research Institute, University-Industry Cooperation Group of Kyung Hee University
    Inventors: Hui Yong Kim, Gwang Hoon Park, Kyung Yong Kim, Sung Chang Lim, Jin Ho Lee, Jin Soo Choi, Jin Woong Kim
  • Patent number: 12010309
    Abstract: A lossless coding mode is proposed in a video coding system comprising a plurality of coding tools, some being lossy by design, some of which can be adapted to become lossless or near lossless. To enable a lossless mode in such system, it is proposed to disable the tools that are lossy by design and use only lossless tools, to adapt some tools to enable lossless coding, and adapt some tools to enable near-lossless coding so that a secondary lossless coding may be applied after residual coding. In a specific embodiment, it is proposed to determine the type of residual coding by, when an information indicates that a transform skip residual coding is used, obtaining a flag representative of a special mode, and when this flag is true, determine that regular residual coding must be used instead of the transform skip residual coding that should be used.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: June 11, 2024
    Assignee: INTERDIGITAL CE PATENT HOLDINGS, SAS
    Inventors: Tangi Poirier, Fabrice Leleannec, Karam Naser, Edouard Francois
  • Patent number: 12003771
    Abstract: Disclosed are methods and apparatuses for image data encoding/decoding. A method of decoding an image includes receiving a bitstream in which the image is encoded; obtaining index information for specifying a block division type of a current block in the image; and determining the block division type of the current block from a candidate group pre-defined in the decoding apparatus. The candidate group includes a plurality of candidate division types, including at least one of a non-division, a first quad-division, a second quad-division, a binary-division or a triple-division. The method also includes dividing the current block into a plurality of sub-blocks; and decoding each of the sub-blocks with reference to syntax information obtained from the bitstream.
    Type: Grant
    Filed: August 2, 2023
    Date of Patent: June 4, 2024
    Assignee: B1 INSTITUTE OF IMAGE TECHNOLOGY, INC.
    Inventor: Ki Baek Kim
  • Patent number: 11985303
    Abstract: A context modeling method includes: determining, for a current block, whether a first preset condition is satisfied and whether a second preset condition is satisfied, where the first preset condition is a preset condition related to a first neighboring block neighboring to the current block in a first direction, the second preset condition is a preset condition related to a second neighboring block neighboring to the current block in a second direction; determining a subclass index of a context model of a first flag of the current block based on the height and the width of the current block; and determining the context model of the first flag of the current block based on a satisfaction status of the first preset condition, a satisfaction status of the second preset condition, and the subclass index of the context model of the first flag.
    Type: Grant
    Filed: June 23, 2021
    Date of Patent: May 14, 2024
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yin Zhao, Lian Zhang, Haitao Yang, Jianle Chen
  • Patent number: 11985352
    Abstract: An orthogonal transform unit orthogonally transforms prediction residuals in a block of a P×Q array of pixels, thereby generating an N×M (N is an integer satisfying N<P, and M is an integer satisfying M<Q) array of orthogonal transform coefficients. A quantization unit quantizes the N×M array of the orthogonal transform coefficients using at least a quantization matrix of an N×M array of elements, and thereby generates an N×M array of quantized coefficients.
    Type: Grant
    Filed: September 7, 2021
    Date of Patent: May 14, 2024
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masato Shima
  • Patent number: 11979603
    Abstract: Aspects of the disclosure provide methods, apparatuses, and non-transitory computer-readable storage mediums for video encoding/decoding. In a method, prediction information for a current block is decoded. The prediction information indicates a first intra prediction mode and a secondary transform index, based on which a secondary transform core is determined. A first transform coefficient block is de-quantized from the prediction information. A size of the first transform coefficient block is less than a size of the secondary transform core. A part of a second transform coefficient block is generated based on the first transform coefficient block and the secondary transform core. A size of the second transform coefficient block equals the size of the secondary transform core. A size of the part of the second transform coefficient equals the size of the first transform coefficient block. The current block is reconstructed based on the part of the second transform coefficient block.
    Type: Grant
    Filed: October 8, 2021
    Date of Patent: May 7, 2024
    Assignee: TENCENT AMERICA LLC
    Inventors: Xin Zhao, Xiang Li, Shan Liu
  • Patent number: 11973934
    Abstract: Provided is a method of decoding a video according to an embodiment, the method including determining at least one processing block for splitting the video; determining an order of determining at least one largest coding unit in the at least one processing block; determining at least one largest coding unit on the basis of the determined order; and decoding the determined at least one largest coding unit, wherein the order is one of a plurality of orders for determining a largest coding unit.
    Type: Grant
    Filed: March 16, 2022
    Date of Patent: April 30, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ki-Ho Choi, Min-woo Park, Elena Alshina, Chan-yul Kim, In-kwon Choi
  • Patent number: 11973951
    Abstract: An image decoding method according to the present document can comprise the steps of: acquiring, from a bitstream, intra prediction mode information and an LFNST index; deriving, as a cross-component linear model (CCLM) mode, an intra prediction mode of a chroma block on the basis of the intra prediction mode information; changing the intra prediction mode of the chroma block from the CCLM mode to an intra prediction mode of a luma block corresponding to the chroma block; determining an LFNST set, including LFNST matrices, on the basis of the intra prediction mode of the luma block; selecting one of the LFNST matrices on the basis of the LFNST set and the LFNST index; and deriving transform coefficients for the chroma block on the basis of the selected LFNST matrix.
    Type: Grant
    Filed: January 10, 2022
    Date of Patent: April 30, 2024
    Assignee: LG ELECTRONICS INC.
    Inventors: Moonmo Koo, Seunghwan Kim, Jaehyun Lim
  • Patent number: 11973978
    Abstract: Decoder for block-based decoding of a picture from a data stream, configured to decode an intra-coding mode for a predetermined block of the picture from the data stream, configured to decode a partition dimension flag for the predetermined block of the picture from the data stream and set a partition dimension depending on the partition dimension flag to be horizontal or vertical and the decoder is configured to partition, along the predetermined dimension, the predetermined block into transform partitions which are as wide as the predetermined block perpendicular to predetermined dimension, furthermore configured to decode, for each transform partition, a transform of a prediction residual from the data stream; intra-predicting the predetermined block depending on one or more already reconstructed samples neighboring the predetermined block in a manner depending on the intra-coding mode to obtain a predictor for the predetermined block; and reconstructing the predetermined block by correcting the predictor
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: April 30, 2024
    Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
    Inventors: Santiago De Luxán Hernández, Benjamin Bross, Phan Hoang Tung Nguyen, Valeri George, Heiko Schwarz, Detlev Marpe, Thomas Wiegand
  • Patent number: 11973935
    Abstract: Provided is a method of decoding a video according to an embodiment, the method including determining at least one processing block for splitting the video; determining an order of determining at least one largest coding unit in the at least one processing block; determining at least one largest coding unit on the basis of the determined order; and decoding the determined at least one largest coding unit, wherein the order is one of a plurality of orders for determining a largest coding unit.
    Type: Grant
    Filed: March 16, 2022
    Date of Patent: April 30, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ki-ho Choi, Min-woo Park, Elena Alshina, Chan-yul Kim, In-kwon Choi
  • Patent number: 11973963
    Abstract: An image decoding method according to the present disclosure includes deriving transform coefficients through dequantization based on the quantized transform coefficients for the target block; deriving modified transform coefficients based on an inverse reduced secondary transform (RST) for the transform coefficients; deriving residual samples for the target block based on an inverse primary transform for the modified transform coefficients; and generating a reconstructed samples based on the residual samples, and prediction samples derived based on an intra prediction mode for the target block, wherein the inverse RST is performed based on a transform kernel matrix selected from a transform set including a plurality of transform kernel matrices, the transform set is determined based on a mapping relationship according to the intra prediction mode applied to the target block, and a plurality of intra prediction modes including the intra prediction mode of the target block are mapped to one transform set.
    Type: Grant
    Filed: December 27, 2022
    Date of Patent: April 30, 2024
    Assignee: LG ELECTRONICS INC.
    Inventors: Moonmo Koo, Mehdi Salehifar, Seunghwan Kim, Jaehyun Lim
  • Patent number: 11968397
    Abstract: A video decoding method according to the present document is characterized by comprising: a step for deriving transform coefficients through inverse quantization on the basis of quantized transform coefficients for a target block; a step for deriving modified transform coefficients on the basis of an inverse reduced secondary transform (RST) of the transform coefficients; and a step for generating a reconstructed picture on the basis of residual samples for the target block on the basis of an inverse primary transform of the modified transform coefficients, wherein the inverse RST using a transform kernel matrix is performed on transform coefficients of the upper-left 4×4 region of an 8×8 region of the target block, and the modified transform coefficients of the upper-left 4×4 region, upper-right 4×4 region, and lower-left 4×4 region of the 8×8 region are derived through the inverse RST.
    Type: Grant
    Filed: January 19, 2023
    Date of Patent: April 23, 2024
    Assignee: LG Electronics Inc.
    Inventors: Moonmo Koo, Seunghwan Kim, Jaehyun Lim
  • Patent number: 11962752
    Abstract: Provided is a method of decoding a video according to an embodiment, the method including determining at least one processing block for splitting the video; determining an order of determining at least one largest coding unit in the at least one processing block; determining at least one largest coding unit on the basis of the determined order; and decoding the determined at least one largest coding unit, wherein the order is one of a plurality of orders for determining a largest coding unit.
    Type: Grant
    Filed: July 27, 2020
    Date of Patent: April 16, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ki-ho Choi, Min-woo Park, Elena Alshina, Chan-yul Kim, In-kwon Choi
  • Patent number: 11962762
    Abstract: According to the present invention, there is provided a method of decoding an image, the method including: determining whether a non-zero residual coefficient is included in a current block; and decoding residual coefficients included in the current block according to a scanning order of the current block, when it is determined that the non-zero residual coefficient is included in the current block. Herein, an absolute value of the residual coefficient of which a scanning index is greater than a residual coefficient adjustment index is equal to or less than a residual coefficient adjustment reference value.
    Type: Grant
    Filed: October 27, 2022
    Date of Patent: April 16, 2024
    Assignee: KT CORPORATION
    Inventor: Bae Keun Lee
  • Patent number: 11962779
    Abstract: An image decoding method according to the present document comprises the steps of: deriving flag information indicating whether valid coefficients are present in a second area excluding a first area of the upper left corner of the current block; parsing an MTS index from a bitstream on the basis of the flag information indicating the absence of valid coefficients in the second area; and deriving residual samples for the current block by applying a conversion kernel derived on the basis of the MTS index to conversion coefficients of the first area, wherein the flag information may be derived by determining, for each scan sub-block in which the valid coefficients are scanned, whether the valid coefficients are present in the second area.
    Type: Grant
    Filed: November 9, 2020
    Date of Patent: April 16, 2024
    Assignee: LG Electronics Inc.
    Inventors: Moonmo Koo, Seunghwan Kim, Mehdi Salehifar, Jaehyun Lim
  • Patent number: 11956422
    Abstract: Provided is a method of decoding a video according to an embodiment, the method including determining at least one processing block for splitting the video; determining an order of determining at least one largest coding unit in the at least one processing block; determining at least one largest coding unit on the basis of the determined order; and decoding the determined at least one largest coding unit, wherein the order is one of a plurality of orders for determining a largest coding unit.
    Type: Grant
    Filed: March 16, 2022
    Date of Patent: April 9, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ki-ho Choi, Min-woo Park, Elena Alshina, Chan-yul Kim, In-kwon Choi
  • Patent number: 11956419
    Abstract: Provided is a method of decoding a video according to an embodiment, the method including determining at least one processing block for splitting the video; determining an order of determining at least one largest coding unit in the at least one processing block; determining at least one largest coding unit on the basis of the determined order; and decoding the determined at least one largest coding unit, wherein the order is one of a plurality of orders for determining a largest coding unit.
    Type: Grant
    Filed: July 27, 2020
    Date of Patent: April 9, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ki-Ho Choi, Min-woo Park, Elena Alshina, Chan-yul Kim, In-kwon Choi
  • Patent number: 11949870
    Abstract: An example method includes determining a color component of a unit of video data; determining, based at least on the color component, a context for context-adaptive binary arithmetic coding (CABAC) a syntax element that specifies a value of a low-frequency non-separable transform (LFNST) index for the unit of video data; CABAC decoding, based on the determined context and via a syntax structure for the unit of video data, the syntax element that specifies the value of the LFNST index for the unit of video data; and inverse-transforming, based on a transform indicated by the value of the LFNST index, transform coefficients of the unit of video data.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: April 2, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Alican Nalci, Hilmi Enes Egilmez, Vadim Seregin, Muhammed Zeyd Coban, Marta Karczewicz
  • Patent number: 11949886
    Abstract: Methods for determining a prediction value, an encoder, and a decoder are provided. Reconstructed values of neighboring samples of a current block are acquired, and then filtered to obtain a reference value set of the current block. When a size of the current block is smaller than a preset threshold value, a first constant value is calculated according to a bit depth value of a luma component of a sample in the current block. A difference between the first constant value and a first reference value in the reference value set is determined as a first prediction input value in a prediction input value set. Other prediction input values in the prediction input value set other than the first prediction input value are determined according to the reference value set. Prediction values of samples at specific positions in the current block is calculated and then filtered.
    Type: Grant
    Filed: February 24, 2023
    Date of Patent: April 2, 2024
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Junyan Huo, Yanzhuo Ma, Shuai Wan, Fuzheng Yang, Wei Zhang, Haixin Wang, Yu Sun
  • Patent number: 11943455
    Abstract: A method for inverse discrete cosine transformation (IDCT) in video coding is provided that includes receiving a transform block, identifying a region of non-zero transform coefficients in the transform block using a group significance map corresponding to the transform block, wherein any transform coefficients not in the region have a value of zero, applying a one-dimensional (1D) IDCT to the region of non-zero transform coefficients in a first direction to generate an interim results block, wherein 1D IDCT computations are not performed on transform coefficients outside the region, and applying a 1D IDCT to the interim results block in a second direction to generate a residual block.
    Type: Grant
    Filed: April 22, 2021
    Date of Patent: March 26, 2024
    Assignee: Texas Instruments Incorporated
    Inventor: Madhukar Budagavi
  • Patent number: 11943445
    Abstract: An image decoding method according to the present document may comprise the steps of: receiving image information including residual information and an LFNST index from a bitstream; deriving a transform coefficient on the basis of the residual information; deriving a flag variable related to whether LFNST is applied to a current block on the basis of the LFNST index; and performing the LFNST on the basis of the flag variable and the transform coefficient, wherein the flag variable is derived for each color component of the current block.
    Type: Grant
    Filed: November 11, 2022
    Date of Patent: March 26, 2024
    Assignee: LG Electronics Inc.
    Inventors: Moonmo Koo, Jie Zhao, Hyeongmoon Jang, Seunghwan Kim, Jaehyun Lim
  • Patent number: 11936870
    Abstract: An image encoding/decoding method and an apparatus thereof are provided. The decoding method includes: determining a coding unit by splitting an image; determining a transform unit in the coding unit; determining whether to decode residual data of the transform unit according to a transform skip mode; obtaining a significant subgroup flag about a subgroup in the transform unit; based on the significant subgroup flag indicating that the subgroup includes at least one non-zero significant coefficient and scanning information about coefficients of the subgroup, obtaining a first bin about a significant coefficient flag, a sign flag, a first flag, and a parity flag of a coefficient of a scan position; obtaining the residual data including a coefficient in the subgroup based on the base level and a remainder of an absolute value excluding the base level; and obtaining a reconstruction block of the coding unit, based on the residual data.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: March 19, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Yinji Piao, Minsoo Park, Minwoo Park, Seungsoo Jeong, Kiho Choi, Narae Choi, Woongil Choi, Anish Tamse
  • Patent number: 11936884
    Abstract: Techniques for coding and deriving (e.g., determining) one or more coded-block-flags associated with video content are described herein. A coded-block-flag of a last node may be determined when coded-block-flags of preceding nodes are determined to be a particular value and when a predetermined condition is satisfied. In some instances, the predetermined condition may be satisfied when log2(size of current transform unit) is less than log2(size of maximum transform unit) or log2(size of current coding unit) is less than or equal to log2(size of maximum transform unit)+1. The preceding nodes may be nodes that precede the last node on a particular level in a residual tree.
    Type: Grant
    Filed: November 8, 2022
    Date of Patent: March 19, 2024
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Bin Li, Jizheng Xu
  • Patent number: 11930200
    Abstract: An apparatus for video decoding, includes processing circuitry configured to determine an affine model for a current block coded with an interweaved affine mode. Based on the affine model, a first prediction block corresponding to a first pattern for partitioning the current block into first sub-blocks and a second prediction block corresponding to a second pattern for partitioning the current block into second sub-blocks can be generated. The first and second prediction blocks include interpolated samples having an intermediate bit-depth larger than an input bit-depth of the current block. Co-located first and samples in the first and second prediction blocks with a precision corresponding to the intermediate bit-depth are weighted averaged to obtain averaged samples. The averaged samples are rounded to the input bit-depth to obtain corresponding third samples in a final prediction block of the current block.
    Type: Grant
    Filed: March 21, 2022
    Date of Patent: March 12, 2024
    Assignee: TENCENT AMERICA LLC
    Inventors: Xiang Li, Guichun Li, Xiaozhong Xu, Shan Liu
  • Patent number: 11930163
    Abstract: A decoder includes circuitry configured to receive a bitstream identify, in the bitstream, a current frame, wherein the current frame includes a plurality of regions, detect, in the bitstream, an indication that a first region is encoded according to a lossless encoding protocol and another region is encoded according to a lossy encoding protocol, and decode the current frame, wherein decoding the current frame further comprises decoding the first region using a lossless decoding protocol corresponding to the lossless encoding protocol.
    Type: Grant
    Filed: June 14, 2022
    Date of Patent: March 12, 2024
    Assignee: OP Solutions, LLC
    Inventors: Hari Kalva, Borivoje Furht, Velibor Adzic
  • Patent number: 11924430
    Abstract: A data encoding method comprises: encoding an ordered array of data values as data representing a data value magnitude and data representing a data value sign; predicting, for a set of data values comprising at least some of the data values, the respective data value sign from a property of one or more other data values in the ordered array; and encoding the data value sign for the set of data values in dependence upon the respective predicted value.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: March 5, 2024
    Assignee: Sony Corporation
    Inventors: Karl James Sharman, Magali Kimlee Miri Philippe
  • Patent number: 11924455
    Abstract: Embodiments of the present disclosure provide a coefficient coding method, an encoder, and a decoder. The method includes the following. A bitstream is parsed to obtain a video flag. When the video flag indicates that a video satisfies a preset condition, the bitstream is parsed to obtain a last-significant-coefficient position-reverse flag and coordinate information of a last significant coefficient. When the last-significant-coefficient position-reverse flag indicates that a position of the last significant coefficient is reversed for a current block, the position of the last significant coefficient is determined by calculation with the coordinate information of the last significant coefficient. According to a preset scanning order, all coefficients before the position of the last significant coefficient are decoded to determine coefficients of the current block.
    Type: Grant
    Filed: September 25, 2023
    Date of Patent: March 5, 2024
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Fan Wang, Zhihuang Xie
  • Patent number: 11924471
    Abstract: A video decoder configured to set a context index variable to a first value, wherein the first value for the context index variable is associated with a first context; context decode a first bin for a syntax element indicating a transform using the first context; determine a new value for the context index variable based on a value of the first bin; context decode a second bin for the syntax element indicating the transform using a context associated with the new value; determine an inverse transform from a set of inverse transform candidates based on the first bin and the second bin; and apply the inverse transform to a set of coefficients to determine a block of residual data.
    Type: Grant
    Filed: June 9, 2021
    Date of Patent: March 5, 2024
    Assignee: QUALCOMM Incorporated
    Inventors: Hilmi Enes Egilmez, Vadim Seregin, Marta Karczewicz
  • Patent number: 11917202
    Abstract: A method and apparatus for performing a frequency-dependent joint component secondary transform (FD-JCST). The method includes obtaining a plurality of transform coefficients in a transform coefficient block; determining whether at least one of the plurality of transform coefficients is a low-frequency coefficient; based on determining that the at least one of the plurality of transform coefficients is the low-frequency coefficient, determining whether the low-frequency coefficient is a non-zero value; and based on determining that the low-frequency coefficient is the non-zero value, performing a joint component secondary transform (JCST) on the low-frequency coefficient and signaling a related syntax to indicate that the JCST is performed.
    Type: Grant
    Filed: October 6, 2021
    Date of Patent: February 27, 2024
    Assignee: TENCENT AMERICA LLC
    Inventors: Xin Zhao, Madhu Peringassery Krishnan, Shan Liu
  • Patent number: 11909981
    Abstract: The present invention relates to an entropy decoding method which includes: generating context related to a bin that forms a codeword of a syntax element; and performing arithmetic decoding of the bin based on the context.
    Type: Grant
    Filed: May 25, 2023
    Date of Patent: February 20, 2024
    Assignee: LG ELECTRONICS INC.
    Inventors: Jaehyun Lim, Byeongmoon Jeon, Yongjoon Jeon, Seungwook Park, Jungsun Kim, Joonyoung Park, Hendry Hendry, Naeri Park, Chulkeun Kim
  • Patent number: 11910018
    Abstract: Disclosed are methods and apparatuses for image data encoding/decoding. A method of decoding an image includes receiving a bitstream in which the image is encoded; obtaining index information for specifying a block division type of a current block in the image; and determining the block division type of the current block from a candidate group pre-defined in the decoding apparatus. The candidate group includes a plurality of candidate division types, including at least one of a non-division, a first quad-division, a second quad-division, a binary-division or a triple-division. The method also includes dividing the current block into a plurality of sub-blocks; and decoding each of the sub-blocks with reference to syntax information obtained from the bitstream.
    Type: Grant
    Filed: August 2, 2023
    Date of Patent: February 20, 2024
    Assignee: B1 INSTITUTE OF IMAGE TECHNOLOGY, INC.
    Inventor: Ki Baek Kim
  • Patent number: 11902561
    Abstract: The present disclosure provides methods for convolutional-neural-network (CNN) based filter for video coding. An exemplary method includes: applying motion estimation to a target coding block, to determine a reference block of the target coding block; inputting, to a convolutional neural network (CNN) filter, image data associated with the target coding block and the reference block; and executing the CNN filter to determine a residual associated with the target coding block based on the input image data.
    Type: Grant
    Filed: April 16, 2021
    Date of Patent: February 13, 2024
    Assignee: Alibaba Group Holding Limited
    Inventors: Zhao Wang, Yan Ye
  • Patent number: 11902579
    Abstract: Disclosed are methods and apparatuses for image data encoding/decoding. A method of decoding an image includes receiving a bitstream in which the image is encoded; obtaining index information for specifying a block division type of a current block in the image; and determining the block division type of the current block from a candidate group pre-defined in the decoding apparatus. The candidate group includes a plurality of candidate division types, including at least one of a non-division, a first quad-division, a second quad-division, a binary-division or a triple-division. The method also includes dividing the current block into a plurality of sub-blocks; and decoding each of the sub-blocks with reference to syntax information obtained from the bitstream.
    Type: Grant
    Filed: August 2, 2023
    Date of Patent: February 13, 2024
    Assignee: B1 INSTITUTE OF IMAGE TECHNOLOGY, INC.
    Inventor: Ki Baek Kim
  • Patent number: 11902545
    Abstract: A method of video decoding performed in a video decoder is disclosed. A syntax element can be received from a bitstream of a coded video indicating that residual blocks of a current coding unit (CU) are processed with a color space conversion. The residual blocks of the current CU can include a luma residual block, a first chroma residual block, and a second chroma residual block. In response to receiving the syntax element indicating that the residual blocks of the current CU are processed with the color space conversion, one of two options of color space conversion equations can be selected based on a transform skip flag and a quantization parameter (QP) corresponding to each of the residual blocks of the current CU. An inverse color space conversion can be applied using the selected option of color space conversion equations to the residual blocks of the current CU.
    Type: Grant
    Filed: June 30, 2022
    Date of Patent: February 13, 2024
    Assignee: TENCENT AMERICA LLC
    Inventors: Ling Li, Xin Zhao, Xiang Li, Shan Liu
  • Patent number: 11889098
    Abstract: A method is provided for coding at least one image split up into partitions, a current partition to be coded containing data, at least one data item of which is allotted a sign. The coding method includes, for the current partition, the following steps: calculating the value of a function representative of the data of the current partition with the exclusion of the sign; comparing the calculated value with a predetermined value of the sign; as a function of the result of the comparison, modifying or not modifying at least one of the data items of the current partition, in the case of modification, coding the at least one modified data item.
    Type: Grant
    Filed: March 11, 2022
    Date of Patent: January 30, 2024
    Assignee: DOLBY INTERNATIONAL AB
    Inventors: Felix Henry, Gordon Clare
  • Patent number: 11882296
    Abstract: An image decoding method carried out by a decoding device, according to the present document, comprises the steps of: acquiring a sign data hiding enable flag; acquiring a transform skip residual coding (TSRC) enable flag on the basis of the sign data hiding enable flag; acquiring residual information for a current block, on the basis of the TSRC enable flag; deriving a residual sample of the current block, on the basis of the residual information; and generating a reconstructed picture on the basis of the residual sample, wherein the sign data hiding enable flag is a flag indicating whether sign data hiding is enabled, the TSRC enable flag is a flag indicating whether TSRC is enabled, and the TSRC enable flag is acquired on the basis of the sign data hiding enable flag having a value of zero.
    Type: Grant
    Filed: September 30, 2022
    Date of Patent: January 23, 2024
    Assignee: LG Electronics Inc.
    Inventors: Jungah Choi, Sunmi Yoo, Junghak Nam, Jin Heo, Jangwon Choi, Seunghwan Kim
  • Patent number: 11876990
    Abstract: A video residual decoding apparatus is used for applying residual decoding to a transform block that is divided into sub-blocks, and includes a residual decoding circuit and a storage device. The residual decoding circuit enters a coefficient loop for decoding one or more syntax elements at each of coefficient positions within a sub-block that has at least one non-zero coefficient level. The coefficient loop includes one decoding pass and at least one other decoding pass. During the at least one other decoding pass, the residual decoding circuit records side information in the storage device, where the side information is indicative of specific coefficient positions at which specific syntax elements need to be decoded in the one decoding pass. During the one decoding pass, the residual decoding circuit refers to the side information for decoding the specific syntax elements at the specific coefficient positions, respectively.
    Type: Grant
    Filed: January 10, 2022
    Date of Patent: January 16, 2024
    Assignee: MEDIATEK INC.
    Inventors: Sheng-Jen Wang, Ming-Long Wu
  • Patent number: 11863715
    Abstract: Methods, systems and devices for implementing adaptive color transform (ACT) and block based delta pulse code modulation (BDPCM) during image/video encoding or decoding are described. An example method of video processing includes determining, for a conversion between a current video unit of a video that is a chroma video unit and a bitstream representation of the video, whether a block-based delta pulse code modulation (BDPCM) mode is available based on a rule, and performing the conversion based on the determining, wherein the rule is based on whether an adaptive color transform (ACT) mode is used for coding the current video unit and/or whether the BDPCM mode is used for coding a luma video unit corresponding to the current video unit.
    Type: Grant
    Filed: June 16, 2022
    Date of Patent: January 2, 2024
    Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD, BYTEDANCE INC.
    Inventors: Weijia Zhu, Jizheng Xu, Li Zhang, Yue Wang
  • Patent number: 11853357
    Abstract: The present invention discloses a new method for analyzing, modifying, and distributing digital images and video in a quick, efficient, practical and/or cost-effective way. The method of processing video can take a different region or object and replace the pixels in the frames of the scenes that comprise the features and characteristics of the identified region or object with a different set of pixels. The replacement or other customizations of the frames and scenes lead to a naturally integrated video or image which is indistinguishable by the human eye or other visual system. In one embodiment, this invention can be used to provide different advertising elements into an image or set of images for different viewers, or to enable a viewer to control elements within a video and add their own preference or other elements.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: December 26, 2023
    Assignee: PANDOODLE CORPORATION
    Inventors: David M Ludwigsen, Dirk Dewar Brown, Mark Bradshaw
  • Patent number: 11847911
    Abstract: Example embodiments described herein therefore relate to an object-model based event detection system that comprises a plurality of sensor devices, to perform operations that include: generating sensor data at the plurality of sensor devices; accessing the sensor data generated by the plurality of sensor devices; detecting an event, or precursor to an event, based on the sensor data, wherein the detected event corresponds to an event category; accessing an object model associated with the event type in response to detecting the event, wherein the object model defines a procedure to be applied by the event detection system to the sensor data; and streaming at least a portion of a plurality of data streams generated by the plurality of sensor devices to a server system based on the procedure, wherein the server system may perform further analysis or visualization based on the portion of the plurality of data streams.
    Type: Grant
    Filed: June 25, 2021
    Date of Patent: December 19, 2023
    Assignee: Samsara Networks Inc.
    Inventors: Saleh ElHattab, Justin Joel Delegard, Bodecker John DellaMaria, Brian Tuan, Jennifer Winnie Leung, Sylvie Lee, Jesse Michael Chen
  • Patent number: 11849133
    Abstract: Techniques are described herein for processing video data using a history-based rice parameter derivation. For instance, a process can include obtaining a transform block including a plurality of samples. One or more parameters (e.g., rice parameters) can be determined for the plurality of samples by analyzing a local neighborhood of a current sample of the plurality of samples and determining that a number of neighboring transform coefficients of the current sample is less than a threshold amount. A historic parameter value (e.g., a historic rice parameter value) determined from one or more previously decoded transform blocks can be obtained and, based at least in part on the historic parameter value, a parameter (e.g., a rice parameter) can be determined for the current sample. The current sample can be decoded based on the determined parameter for the current sample.
    Type: Grant
    Filed: December 9, 2021
    Date of Patent: December 19, 2023
    Assignee: QUALCOMM Incorporated
    Inventors: Dmytro Rusanovskyy, Marta Karczewicz
  • Patent number: 11849124
    Abstract: A video image encoding device, in a first mode, variable-length-encodes a residual coefficient to generate a coefficient code string, outputs the coefficient code string and the header information in a state in which the header information is associated with the coefficient code string, in a second mode, directly uses a differential image as a coefficient code string without variable-length-encoding the differential image, and outputs the coefficient code string and the header information in a state in which the header information is associated with the coefficient code string.
    Type: Grant
    Filed: March 4, 2022
    Date of Patent: December 19, 2023
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Hideyuki Ohgose, Kiyofumi Abe, Hiroshi Arakawa, Tatsuro Juri, Kazuhito Kimura
  • Patent number: 11843781
    Abstract: An encoding method, a decoding method, and a decoder are provided. The method includes the following. A prediction parameter of a current block is determined, where the prediction parameter includes a prediction mode parameter. Neighbouring sample values of the current block are obtained and matrix-based intra prediction (MIP) input sample values of the current block are determined according to the neighbouring sample values of the current block, when the prediction mode parameter indicates that an MIP mode is used to determine an intra prediction value of a chroma component of the current block. An MIP prediction value of the chroma component of the current block is determined according to the MIP input sample values, an MIP weighting matrix, and a shifting parameter. The intra prediction value of the chroma component of the current block is determined by filtering the MIP prediction value.
    Type: Grant
    Filed: July 6, 2022
    Date of Patent: December 12, 2023
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Junyan Huo, Shuai Wan, Yanzhuo Ma
  • Patent number: 11843767
    Abstract: A method, computer program, and computer system is provided for video coding. Video data comprising a reference frame and residual blocks is received. Transform coefficients associated with the residual blocks are identified. The video data corresponding to the one or more residual blocks is encoded based on an extended dynamic range associated with the transform coefficients.
    Type: Grant
    Filed: January 19, 2022
    Date of Patent: December 12, 2023
    Assignee: TENCENT AMERICA LLC
    Inventors: Cheung Auyeung, Xiang Li, Shan Liu
  • Patent number: 11838518
    Abstract: Improved video compression and video streaming systems and methods are disclosed for environments where camera motion is common, such as cameras incorporated into head-mounted displays. This is accomplished by combining a 3D representation of the shape of the user's environment (walls, floor, ceiling, furniture, etc.), image data, and data representative of changes in the location and orientation (pose) of the camera between successive image frames, thereby reducing data bandwidth needed to send streaming video in the presence of camera motion.
    Type: Grant
    Filed: November 18, 2022
    Date of Patent: December 5, 2023
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Forrest Power Trepte
  • Patent number: 11831900
    Abstract: Methods and apparatus encode image frames using intra-frame prediction by predicting pixels for a block of current pixels, based on a detected spatial pattern of pixel intensity differences among a plurality of neighboring reconstructed pixels to the block of current pixels, and encode a block of pixels of the image frame using the predicted block of reconstructed pixels. Inter-frame prediction is provided by determining whether blocks of pixels in temporally neighboring reconstructed frames corresponding to a candidate motion vector have a pattern of pixel intensity differences among the blocks from temporally neighboring frames. Predicted blocks are produced for a reconstructed frame based on the determined pattern of pixel intensity difference among temporally neighboring frames.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: November 28, 2023
    Assignee: ATI TECHNOLOGIES ULC
    Inventors: Haibo Liu, Ihab Amer
  • Patent number: 11825118
    Abstract: A method of decoding or encoding including receiving information regarding a video sequence for encoding or decoding, determining, for the encoding or decoding of the video sequence, whether to use a first transform core matrix that is of a first size type or a second transform core matrix that is of a second size type, and based on the determining, transmitting information that causes the video sequence to be encoded or decoded using the determined first transform core matrix or second transform core matrix.
    Type: Grant
    Filed: January 13, 2022
    Date of Patent: November 21, 2023
    Assignee: TENCENT AMERICA LLC
    Inventors: Xin Zhao, Xiang Li, Shan Liu
  • Patent number: 11818349
    Abstract: An improvement in coding efficiency is achieved through restrictions on successive divisions of asymmetric splitting in advanced video coding algorithms, which frequently rely on splitting of a block of video data prior to coding using several transform sizes. Successive divisions of asymmetric splitting are forbidden if an equivalent split can be attained using triple splitting. In an embodiment, a video block is split using successive splits, but the second type of split is dependent on the first type of split.
    Type: Grant
    Filed: August 12, 2021
    Date of Patent: November 14, 2023
    Assignee: INTERDIGITAL VC HOLDINGS, INC.
    Inventors: Fabrice Leleannec, Tangi Poirier, Gagan Rath, Fabrice Urban