Quantization Patents (Class 375/240.03)
  • Patent number: 11190775
    Abstract: A method for supporting video coding includes obtaining an image frame including a plurality of coding block groups each including one or more coding blocks, using a first coding control model associated with a first coding block group in the image frame to estimate one or more first coding parameters, using a second coding control model associated with a second coding block group in the image frame to estimate one or more second coding parameters, determining one or more effective coding parameters based on an evaluation of the one or more first coding parameters and the one or more second coding parameters, and using the one or more effective coding parameters to encode the plurality of coding block groups in the image frame.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: November 30, 2021
    Assignee: SZ DJI TECHNOLOGY CO., LTD.
    Inventors: Liang Zhao, Wenyi Su, Lei Zhu
  • Patent number: 11190792
    Abstract: A method for decoding a picture from a bitstream. In one embodiment, The method includes: receiving a slice header for a slice of the picture, wherein the slice header comprises a state syntax element; decoding a state value from the state syntax element in the slice header, wherein a) if the state value is not equal to a first value, then the state value indicates that i) the bitstream includes for the picture a picture header comprising a set of picture syntax elements and ii) the slice header does not comprise the set of picture syntax elements and b) if the state value is equal to the first value, then the state value indicates that i) the slice header contains said set of picture syntax elements and ii) the bitstream does not include a picture header for the picture; and using the set of picture syntax elements to decode the slice of the picture.
    Type: Grant
    Filed: December 15, 2020
    Date of Patent: November 30, 2021
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Rickard Sjöberg, Martin Pettersson, Mitra Damghanian
  • Patent number: 11190777
    Abstract: A method for video decoding in a decoder is provided. In the method, coded information of a current block is received from a coded video bitstream. Dimension information and partition information of the current block are determined based on the coded information. A partition mode of the current block is determined as one of an intra sub-partition (ISP) mode and a coding unit partition based on the dimension information and the partition information of the current block. Further, the current block is decoded based on the determined partition mode of the current block.
    Type: Grant
    Filed: June 22, 2020
    Date of Patent: November 30, 2021
    Assignee: TENCENT AMERICA LLC
    Inventors: Xiang Li, Xin Zhao, Liang Zhao, Cheung Auyeung, Shan Liu
  • Patent number: 11184620
    Abstract: Provided is an image decoding method including determining at least one first processing mode for decoding of a current block, based on a motion vector resolution (MVR) of the current block, the at least one first processing mode being from among a plurality of processing modes included in at least one of a prediction process, a transform process, and a filtering process; and decoding the current block, according to the at least one first processing mode.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: November 23, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jin-young Lee, Min-woo Park, Anish Tamse
  • Patent number: 11184614
    Abstract: An image processing apparatus includes an image processor and an encoder. The image processor enhances an edge of an input image, removes noise from the input image, synthesizes the edge-enhanced image and the noise-removed image, and removes a high frequency from the synthesized image. The encoder pre-encodes a downsized synthesized image, obtains a pre-bit rate of the pre-encoded image, sets a quantization parameter value based on a reference bit rate and the pre-bit rate, and compresses the high-frequency removed image based on the quantization parameter value.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: November 23, 2021
    Assignee: HANWHA TECHWIN CO., LTD.
    Inventors: Ji Hyung Ryu, Il Sik Yang
  • Patent number: 11184637
    Abstract: Innovations in adaptive encoding and decoding for units of a video sequence can improve coding efficiency. For example, some of the innovations relate to encoding/decoding that includes adaptive switching of color spaces between units within a video sequence. Other innovations relate encoding/decoding that includes adaptive switching of color sampling rates between units within a video sequence. Still other innovations relate encoding/decoding that includes adaptive switching of bit depths between units within a video sequence.
    Type: Grant
    Filed: April 16, 2020
    Date of Patent: November 23, 2021
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Bin Li, Jizheng Xu, Feng Wu
  • Patent number: 11184627
    Abstract: The embodiments of this disclosure provide a video transcoding system and method, and related products. The system includes: a main transcoder circuitry configured to acquire an input video, transcode the input video to generate a transcoded video, and transmit the transcoded video to a receiving device; and a backup transcoder circuitry configured to acquire the input video, buffer the input video, acquire transcoding location information of the main transcoder circuitry at the time when the main transcoder circuitry is down, transcode the buffered input video according to the transcoding location information to generate an output video, and transmit the output video to the receiving device.
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: November 23, 2021
    Assignee: Tencent Technology (Shenzhen) Company Limited
    Inventors: Hongshun Zhang, Ximing Cheng, Huihui Hou
  • Patent number: 11184643
    Abstract: A system and method for processing a video stream are provided. When coding or decoding a video stream a de-blocking filtering may be applied for reducing discontinuities caused by use of a block-based video coding. The de-blocking filtering is performed using a filter grid. The size of the filter grid is chosen adaptively based on the processing parameters. The adaptive size of the filtering grid is determined based on the number of samples used and modified in de-blocking filtering of an edge of a coding block. The filtering grid may be used both for vertical and horizontal edge filtering.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: November 23, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Anand Meher Kotra, Semih Esenlik, Zhijie Zhao
  • Patent number: 11178430
    Abstract: Methods are provided for sharpening or otherwise modifying compressed images without decompressing and re-encoding the images. An overall image quality is determined based on the source of the compressed image, the quantization table of the compressed image, or some other factor(s), and a set of scaling factors corresponding to the image quality is selected. The selected scaling factors are then applied to corresponding quantization factors of the image's quantization table or other parameters of the compressed image that describe the image contents of the compressed image. The scaling factors of a given set of scaling factors can be determined by a machine learning process that involves training the scaling factors based on training images determined by decompressing and then sharpening or otherwise modifying a source set of compressed images. These methods can provide improvements with respect to encoded image size and computational cost of the image modification method.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: November 16, 2021
    Assignee: Google LLC
    Inventors: Peyman Milanfar, Feng Yang, Sungjoon Choi
  • Patent number: 11178401
    Abstract: A method of controlling output bitrate of a video encoder encoding a video sequence comprises: setting an allowable average bitrate, gathering encoding data by encoding video during a first time period and for each of a plurality of time intervals, storing a respective output bitrate, and a quantisation parameter used for encoding during the respective time interval. For each time interval, the output bitrate is normalised by calculating a corresponding normalised bitrate estimated for a predetermined nominal quantisation parameter as a function of the output bitrate and the quantisation parameter. An average normalised bitrate is calculated by averaging the normalised bitrates of the plurality of time intervals. A new quantisation parameter is calculated based on a comparison of the average normalised bitrate and the allowable average bitrate. The video sequence is encoded using the new quantisation parameter during a second time period subsequent to the first time period.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: November 16, 2021
    Assignee: Axis AB
    Inventors: Xing Danielsson Fan, Viktor Edpalm, Alexander Toresson
  • Patent number: 11172200
    Abstract: An example video decoder is configured to decode a first value for a first syntax element of a current block of video data, the first value indicating that the current block is encoded using an intra-prediction mode; after decoding the first value, decode a second value for a second syntax element of the current block, the second value indicating that the current block is encoded using intra mapping mode. In the intra mapping mode, the video decoder is configured to generate a prediction block for the current block using the intra-prediction mode and decode a residual block. To decode the residual block, the video decoder is configured to determine predictors for quantized residual values of the residual block and map decoded mapping values to the quantized residual values using the predictors. The video decoder combines the prediction block with the residual block to decode the current block.
    Type: Grant
    Filed: June 4, 2020
    Date of Patent: November 9, 2021
    Assignee: Qualcomm Incorporated
    Inventors: Marta Karczewicz, Yu Han, Muhammed Zeyd Coban, Yung-Hsuan Chao, Hongtao Wang
  • Patent number: 11166042
    Abstract: Innovations in adaptive encoding for units of a video sequence can improve coding efficiency. For example, some of the innovations relate to encoding that includes adaptive switching of color spaces between units within a video sequence. Other innovations relate encoding that includes adaptive switching of color sampling rates between units within a video sequence. Still other innovations relate encoding that includes adaptive switching of bit depths between units within a video sequence.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: November 2, 2021
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Bin Li, Jizheng Xu, Feng Wu
  • Patent number: 11166023
    Abstract: Methods for quantization parameter (QP) prediction are presented. In a coded bitstream that includes QP values, instead of simply embedding all delta QP values in the bitstream, the bitstream may include QP-related syntax elements that allow a decoder to reconstruct the delta QP values using luma-based QP prediction. Encoding and decoding bitstream examples are provided where delta QP values may be predicted using information from just the luminance values of the prediction blocks of the current block or by additional luminance information from its known neighbors (e.g., from the left or above blocks) and a base QP value.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: November 2, 2021
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Fangjun Pu, Taoran Lu, Peng Yin, Tao Chen
  • Patent number: 11166058
    Abstract: Systems and methods are described for providing trick play functions such as fast forward, rewind or slow motion during playback of streaming media content. Multiple sets of streamlets or other media files that represent the same media stream are encoded differently from each other (e.g., at different frame rates and/or frame directions), and each set of files is simultaneously maintained at a server. Files encoded at a first format are made available to the client device during regular playback, and files encoded at a different frame rate and/or a different direction of encoding are made available to support trick play.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: November 2, 2021
    Assignee: DISH Technologies L.L.C.
    Inventor: Mark B. Hurst
  • Patent number: 11166030
    Abstract: An embodiment includes a method and an encoder for SSIM-based bits allocation. The encoder includes a memory and a processor utilized for allocating bits based on SSIM, wherein the processor estimates the model parameter of SSIM-based distortion model for the current picture and determines allocates bits based on the SSIM estimation.
    Type: Grant
    Filed: April 2, 2020
    Date of Patent: November 2, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Do-Kyoung Kwon, Hyung-Joon Kim
  • Patent number: 11159799
    Abstract: A method and system for encoding a plurality of signals are provided. A plurality of input signals are received. Complexity information relating to a given input signal of the plurality of input signals is obtained. A data rate target for each of the plurality of input signals is derived in dependence on an overall data rate target for the plurality of input signals. The data rate target for the given input signal depends at least in part on the complexity information relating to the given input signal. The plurality of input signals are encoded in accordance with the respective derived data rate targets to obtain a plurality of encoded signals.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: October 26, 2021
    Assignee: V-NOVA INTERNATIONAL LIMITED
    Inventors: Guido Meardi, Richard Clucas
  • Patent number: 11153562
    Abstract: A method and apparatus for adaptive de-blocking filter are disclosed. One or more parameters associated with a de-blocking filter are determined. De-blocking filter using the derived parameters are then applied to reconstructed blocks. Each set of parameters is used for each picture, slice, coding tree unit (CTU) or CU (coding unit). The parameters can be signalled in VPS (video parameter set), SPS (sequence parameter set), PPS (picture parameter set), slice header, CTU (coding tree unit) or CU (coding unit) of the video bitstream. The parameters correspond to one or more values used as thresholds, clipping boundaries, or both the thresholds and clipping boundaries for the de-blocking filter. In one embodiment, the parameters for the current picture are determined using a training process using a current coded picture a previous coded picture as training data.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: October 19, 2021
    Assignee: MEDIATEK SINGAPORE PTE. LTD.
    Inventors: Kai Zhang, Jicheng An, Han Huang
  • Patent number: 11153606
    Abstract: A method of perceptual video coding based on face detection is provided. The method includes calculating a bit allocation scheme for coding a light field video based on a saliency map of the face, calculating an LCU level Lagrange multiplier for coding a light field video based on a saliency map of the face and calculating an LCU level quantization parameter for coding a light field video based on a saliency map of the face.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: October 19, 2021
    Assignee: ShanghaiTech University
    Inventors: Zhiru Shi, Qiang Hu
  • Patent number: 11146829
    Abstract: The present disclosure provides methods for processing video content. One exemplary method comprises: receiving a bitstream comprising coded video data; determining a first parameter of a coding block; determining, according to the first parameter, one or more second parameters associated with a delta quantization parameter (QP) value or a chroma QP offset value; and determining, according to the one or more second parameters, at least one of the delta QP value or the chroma QP offset value.
    Type: Grant
    Filed: August 21, 2020
    Date of Patent: October 12, 2021
    Assignee: Alibaba Group Holding Limited
    Inventors: Jie Chen, Ru-Ling Liao, Jiancong Luo, Yan Ye
  • Patent number: 11146823
    Abstract: A method of decoding video data includes receiving a first chroma quantization parameter (QP) mapping table in an encoded video bitstream, determining a first chroma QP value for a first chroma block of video data from a luma QP value and the first chroma QP mapping table, decoding the first chroma block of video data using the first chroma QP value.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: October 12, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Adarsh Krishnan Ramasubramonian, Dmytro Rusanovskyy, Geert Van der Auwera, Marta Karczewicz
  • Patent number: 11140420
    Abstract: Described are various embodiments of systems, methods and devices for transmitting, over a digital network, a digital image data object defined by a plurality of image pixels, wherein embodiments comprise: a digital image compressor operable to compress the digital image data object by independently compressing distinct pixel groups defined amongst the plurality of image pixels into independently compressed pixel groups to be transmitted over the digital network, in which, for each of said compressed pixel groups, a comparison value indicative of a similarity between given pixel data of a given group pixel and reference pixel data of a corresponding reference pixel is computed to at least partially replace said given pixel data; and a digital image decompressor coupled thereto operable to receive each of said independently compressed pixel groups for independent decompression.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: October 5, 2021
    Assignee: PLEORA TECHNOLOGIES INC.
    Inventors: Eric Boisvert, Mojtaba Hosseini
  • Patent number: 11140419
    Abstract: The present disclosure provides an image processing method and device, which are applied to the technical field of image processing, wherein the method comprises: dividing an infrared decompression image with block artifacts into image blocks distributed in a rectangular array; acquiring boundary gray information of the image blocks, and then determining boundary drop information of each image block and its adjacent image block, thereby obtaining drop information of the image block; constructing a constraint optimization objective function of the image based on the boundary drop information, the drop information and preset compensation information; determining a target compensation matrix according to the constraint optimization objective function, wherein each element value in the target compensation matrix is a target value of compensation information of an image block, the position of which in the image is the same as the position of the element value in the target compensation matrix.
    Type: Grant
    Filed: September 28, 2019
    Date of Patent: October 5, 2021
    Assignee: SHENZHEN UNIVERSITY
    Inventors: Jihong Pei, Xuhui Shao, Xuan Yang
  • Patent number: 11140397
    Abstract: A method for encoding image signal, according to the present invention, can: encode a partial block coefficient flag indicating whether a coefficient of a current partial block is a non-zero coefficient; encode a first flag indicating whether an absolute value of the coefficient is greater than 1, encode a second flag indicating whether the absolute value of the coefficient is greater than 2; encode the residual coefficients, which have not been encoded, on the basis of the first flag or the second flag in the current partial block; and encode a code for the coefficient of the current partial block.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: October 5, 2021
    Assignee: Industry Academy Cooperation Foundation of Sejong University
    Inventors: Joo Hee Moon, Dong Jae Won, Sung Won Lim
  • Patent number: 11134250
    Abstract: A method for controlling video coding including obtaining an image frame. The image frame includes a plurality of coding block groups each associated with a respective coding control model. The method further includes determining whether a coding block group is an initial coding block group or a subsequent coding block group of the image frame. If the coding block group is the initial coding block group, for an initial coding control model associated with the initial coding block group, values of one or more coding parameters are determined based on a bit allocation for the initial coding block group, and the initial coding block group is encoded using the initial coding control model with the determined values of the one or more coding parameters. If the coding block group is the subsequent coding block group, a bit allocation for the subsequent coding block group is updated based on the encoded initial coding block group.
    Type: Grant
    Filed: May 12, 2020
    Date of Patent: September 28, 2021
    Assignee: SZ DJI TECHNOLOGY CO., LTD.
    Inventors: Liang Zhao, Wenyi Su, Lei Zhu
  • Patent number: 11126887
    Abstract: An enhanced graph transformation-based point cloud attribute compression method. For point cloud attribute information, a point cloud is first subjected to airspace division by using a K-dimension (KD) tree; a new graph transformation processing method in combination with spectral analysis is provided; the point cloud is then subjected to spectral clustering on graphs in coded blocks of the point cloud; expansion is performed on the basis of existing graph transformation to implement a local graph transformation scheme; enhanced graph transformation with two transformation modes is formed; the compression performance of graph transformation is improved. The method comprises: performing color space transformation of point cloud attributes; dividing the point cloud by using the KD tree to obtain the coded blocks; performing spectral clustering-based enhanced graph transformation; performing transformation mode decision; and performing uniform quantization and entropy coding.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: September 21, 2021
    Assignee: Peking University Shenzhen Graduate School
    Inventors: Ge Li, Yiting Shao
  • Patent number: 11122281
    Abstract: A method of representing displacement information between the frames of a video and/or multiview sequence, comprising the steps of assigning a plurality of the frames to a Group of Pictures (GOPs), providing a base displacement model for each GOP, the base displacement model describing a displacement field that carries each location in a designated base frame of the GOP to a corresponding location in each other the frame of the GOP, and inferring other displacement relationships between the frames of the GOP from the base displacement model. Embodiments include a piecewise smooth displacement field, deformable mesh, reverse displacement field, double mapping, synthesize optical blur and foreground-background discrimination process.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: September 14, 2021
    Assignee: KAKADU R&D PTY LTD.
    Inventors: David Scott Taubman, Dominic Patric Ruefenacht
  • Patent number: 11122293
    Abstract: An intra-frame prediction-based point cloud attribute compression method. A new block structure-based intra-frame prediction scheme is provided for point cloud attribute information, where four prediction modes are provided to reduce information redundancy among different coding blocks as much as possible and improve point cloud attribute compression performance. The method comprises: performing point cloud attribute color space conversion; dividing a point cloud by using a K-dimensional (KD) tree to obtain coding blocks; performing block structure-based intra-frame prediction; performing intra-frame prediction mode division; performing conversion, uniform quantization, and entropy coding.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: September 14, 2021
    Assignee: Peking University Shenzhen Graduate School
    Inventors: Ge Li, Yiting Shao
  • Patent number: 11109045
    Abstract: The present principles relates to a method for encoding an image unit comprising image data represented by a luminance channel and at least one chrominance channel, the method comprising obtaining a luma coding-tree by splitting a luminance unit representative of the luminance channel of said image unit and obtaining a chroma coding-tree by splitting a chrominance unit representative of at least one chrominance channel of said image unit. The method is characterized in that obtaining said chroma coding-tree comprises: —determining whether said chroma coding-tree and said luma coding-tree are identical; and —signaling an information data indicating whether said chroma coding-tree and said luma coding-tree are identical.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: August 31, 2021
    Assignee: INTERDIGITAL VC HOLDINGS, INC.
    Inventors: Fabrice Urban, Franck Galpin, Tangi Poirier, Fabrice Leleannec
  • Patent number: 11109024
    Abstract: The present disclosure relates to image coding/decoding applying deblocking filtering and decoder-based intra-mode determination. In order to efficiently use software and/or hardware resources, the size of the template for the decoder-based intra-mode determination is smaller than the number of lines used by the deblocking filtering.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: August 31, 2021
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Anand Meher Kotra, Shan Liu, Zhijie Zhao, Semih Esenlik, Han Gao
  • Patent number: 11109033
    Abstract: A system-on-chip which includes a video codec including a deblocking filter includes a motion estimator that calculates a motion vector of an input image, a motion compensator that compensates for a motion of the input image by using the motion vector, and a parameter generator that allows image data, in which the motion is compensated, to be transferred to and filtered by the deblocking filter of the video codec.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: August 31, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Juwon Byun, Jeehoon An
  • Patent number: 11109038
    Abstract: An intra frame bit rate allocation method being performed by a computer device comprising at least one processor, includes when a current frame of picture is an intra frame in a specified frame sequence, pre-encoding the current frame of picture; calculating a corresponding intra frame encoding cost and an inter frame encoding cost of the pre-encoding; and allocating an intra frame bit rate according to the calculated intra frame encoding cost and the inter frame encoding cost.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: August 31, 2021
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LTD
    Inventors: Xu Nan Mao, Yao Yao Guo, Li Cai Guo, Yong Fang Shi, An Lin Gao, Haibo Deng, Chen Chen Gu, Jing Lv
  • Patent number: 11100609
    Abstract: Provided is a method determines a boundary strength for each 4-sample edge lying on 8×8 sample grid, determines whether deblocking filtering is performed on the 4-sample edge or not if the boundary strength is not equal to zero, selects a deblocking filter if the deblocking filtering is performed on the 4-sample edge, and filters the 4-sample edge using the selected filter. Accordingly, the computational complexity required to determine the boundary strength according to the present invention is reduced by 50% or more when compared with the HEVC under development. Also, the memory capacity and bandwidth required to determine the boundary strength are reduced by 50% or more without deterioration of image quality.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: August 24, 2021
    Assignee: INFOBRIDGE PTE. LTD.
    Inventor: Min Jang
  • Patent number: 11102489
    Abstract: When intra prediction is to be used, an encoder determines whether an adaptive basis selection mode is to be used and whether a size of the current block matches a determined size. When the adaptive basis selection mode is to be used and the size matches the determined size, the encoder fixes the first transform basis for the current block to a first determined transform basis in the adaptive basis selection mode, and generates first transform coefficients by performing first transform of residual signals of the current block using the first determined transform basis; quantizes the first transform coefficients when an intra prediction mode for the current block is a determined mode; and generates second transform coefficients by performing second transform of the first transform coefficients using a second transform basis, and quantizes the second transform coefficients, when the intra prediction mode is not the determined mode.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: August 24, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Masato Ohkawa, Hideo Saitou, Tadamasa Toma, Takahiro Nishi, Kiyofumi Abe, Ryuichi Kanoh
  • Patent number: 11095894
    Abstract: Provided is a method of encoding an image, the method including: determining a subjective quality of the image when the image is compressed; determining at least one degree of compression that changes the subjective quality and is from among degrees of compression indicating how much the image is compressed; and encoding the image by compressing a residual signal of the image, based on compression information according to the determined degree of compression, wherein the subjective quality is determined for each frame by using a Deep Neural Network (DNN). Provided are an image decoding method and an image decoding apparatus for performing the image decoding method for decoding an image by using information encoded according to an image encoding method.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: August 17, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sun-young Jeon, Jae-hwan Kim, Young-o Park, Jeong-hoon Park, Jong-seok Lee, Kwang-pyo Choi
  • Patent number: 11095893
    Abstract: A video coding device (e.g., a video encoder or a video decoder) is configured to perform various transformations on video data. The video coding device applies a primary transform to a block of the video data, the primary transform having a first size, and the sub-block being at least a portion of the block. The video coding device determines whether application of a secondary transform, having a second size, to a sub-block of the block is allowed. Application of the secondary transform is disallowed when the first size is equal to the second size. Based on the application of the secondary transform being allowed, the video coding device applies the secondary transform to the sub-block. Application of the primary transform and the secondary transform construct a residual block in a pixel domain.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: August 17, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Cheng-Teh Hsieh, Vadim Seregin, Xin Zhao, Amir Said, Vijayaraghavan Thirumalai, Marta Karczewicz
  • Patent number: 11095828
    Abstract: A video signal conversion device includes a front end interface, a rear end interface, a video detector and a video processor. The front end interface is coupled to a video source to receive an input signal. The rear end interface is coupled to a video receiver. The video detector determines whether the input signal corresponds to HDR imaging format. The video detector generates a conversion command in response to the input signal corresponding to HDR imaging format. The video processor is coupled to the front end interface, the rear end interface and the video detector. When the video processor receives the conversion command, the video processor converts the input signal into an output signal with SDR imaging format. The video processor sends the output signal to the video receiver via the rear end interface.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: August 17, 2021
    Assignee: AVerMedia TECHNOLOGIES, INC.
    Inventors: Wen-Chien Chang, Yen-Cheng Yao
  • Patent number: 11095911
    Abstract: Provided is a method of decoding an image, the method including: determining at least one prediction unit included in a current frame that is one of at least one frame forming the image; determining a reference region to be referred to by a current prediction unit that is one of the at least one prediction unit; changing a sample value included in at least one of the current prediction unit and the reference region, based on an analyzing result of a sample value of the reference region; determining a sample value included in the current prediction unit, based on a result of changing the sample value; and decoding the image based on the determined sample value of the current prediction unit.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: August 17, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Min-woo Park, Bo-ra Jin, In-kwon Choi
  • Patent number: 11095882
    Abstract: Devices, systems and methods for digital video coding, which include pulse code modulation techniques, are described. An exemplary method for video processing includes determining, for a current block of video, that at least one of a first coding mode in which pulse code modulation is used or a second coding mode in which multiple reference line based intra prediction is used is enabled, and performing, based on the first coding mode or the second coding mode, a conversion between the current block and a bitstream representation of the video, wherein a first indication indicative of use of the first coding mode and/or a second indication indicative of use of the second coding mode are included in the bitstream representation according to an ordering rule.
    Type: Grant
    Filed: October 15, 2020
    Date of Patent: August 17, 2021
    Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., BYTEDANCE INC.
    Inventors: Li Zhang, Kai Zhang, Hongbin Liu, Jizheng Xu, Yue Wang
  • Patent number: 11089316
    Abstract: A method of decoding a received set of encoded data is provided. The set of encoded data represents information that comprises a plurality of data elements having values within a range of values and that has been compressed by way of entropy encoding. The method comprises: receiving data comprising the set of encoded data and a set of banded distribution data, wherein the set of banded distribution data comprises one or more pairs of values, each pair comprising a sub-range value indicating a respective sub range of the range of values and a probability value representing a probability of a data element of the plurality of data elements having a value within the respective sub-range; and reconstructing the information that has been compressed, by way of performing entropy decoding, based upon a probability distribution defined by the set of banded distribution data, upon the set of encoded data.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: August 10, 2021
    Assignee: V-NOVA INTERNATIONAL LIMITED
    Inventors: Ivan Makeev, Balázs Keszthelyi, Stergios Poularakis, Michele Sanna, Robert Ettinger
  • Patent number: 11089359
    Abstract: The disclosed computer-implemented method may include (1) receiving, at a computing device, a compressed video bitstream that includes (A) video data and (B) in-band metadata that indicates a video quality of the compressed video bitstream, (2) extracting, at the computing device, the in-band metadata from the compressed video bitstream, (3) determining, based at least in part on the in-band metadata, the video quality of the compressed video bitstream, and then (4) making at least one video-processing decision in connection with the compressed video bitstream based at least in part on the video quality of the compressed video bitstream. Various other systems and methods are also disclosed.
    Type: Grant
    Filed: January 13, 2020
    Date of Patent: August 10, 2021
    Assignee: Facebook, Inc.
    Inventor: Ioannis Katsavounidis
  • Patent number: 11076172
    Abstract: A specification defining allowable luma and chroma code-values is applied in a region-of-interest encoding method of a mezzanine compression process. The method may include analyzing an input image to determine regions or areas within each image frame that contain code-values that are near allowable limits as specified by the specification. In addition, the region-of-interest method may comprise then compressing those regions with higher precision than the other regions of the image that do not have code-values that are close to the legal limits.
    Type: Grant
    Filed: December 14, 2019
    Date of Patent: July 27, 2021
    Assignee: WARNER BROS. ENTERTAINMENT INC.
    Inventors: Michael Smith, Bradley Collar
  • Patent number: 11076157
    Abstract: A hardware encoder has a block analyzer configured in hardware to selectively alter encoding parameters of a coding unit or a coding tree unit in response to encoder conditions and an analysis of the coding unit or coding tree unit. A stream analyzer operating as a software process on one or more computational cores selectively alters encoding parameters in response to evaluation of parameters associated with a stream of video data.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: July 27, 2021
    Assignee: NGCodec Inc.
    Inventors: Alberto Duenas, Frank Bossen
  • Patent number: 11070831
    Abstract: The present invention relates to a method for decoding a bitstream for a video signal, and a device therefor, and relates to a device and a method in which, according to whether or not intra linear interpolation prediction is performed for the current block, a candidate mode list is formed on the basis of the intra prediction mode of the neighboring block of the current block, a candidate mode is determined, and, on the basis of same, intra LIP is carried out, thereby generating a prediction value for the current block.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: July 20, 2021
    Assignee: LG ELECTRONICS INC.
    Inventor: Jin Heo
  • Patent number: 11070824
    Abstract: The present disclosure relates to an image processing device and method that allow reduction in coding efficiency to be suppressed. A pixel value of a chroma component is predicted by linear prediction from a pixel value of a reference image of a luma component whose pixel location is changed by using a filter, and a prediction image of the chroma component is generated. A chroma component of encoded data in which an image is encoded is decoded by using the generated prediction image. The filter is selected on a basis of information regarding a pixel location of the chroma component and information regarding a color format. The present disclosure is applicable, for example, to an image processing device, an image encoding device, an image decoding device, or the like.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: July 20, 2021
    Assignee: SONY CORPORATION
    Inventor: Takeshi Tsukuba
  • Patent number: 11070807
    Abstract: A data encoding apparatus includes a memory storing computer-readable instructions; and one or more processors configured to execute the computer-readable instruction such that the one or more processors are configured to, receive first video data in a macroblock unit, determine a first rounding offset value using the first video data, create second video data by applying the first rounding offset value to the first video data, determine a second rounding offset value, which is different from the first rounding offset value, using the second video data, and create a quantized coefficient by applying the second rounding offset value to the first video data.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: July 20, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Young-Beom Jung
  • Patent number: 11070809
    Abstract: A system and method for regenerating high dynamic range (HDR) video data from encoded video data, extracts, from the encoded video data, a self-referential metadata structure specifying a video data reshaping transfer function. The video data reshaping transfer function is regenerated using data from the metadata structure and the extracted reshaping transfer function is used to generate the HDR video data by applying decoded video data values to the reshaping transfer function.
    Type: Grant
    Filed: May 21, 2020
    Date of Patent: July 20, 2021
    Assignee: ARRIS Enterprises LLC
    Inventors: David M. Baylon, Zhouye Gu, Ajay Luthra, Koohyar Minoo, Yue Yu
  • Patent number: 11070837
    Abstract: An encoder includes circuitry and memory. Using the memory, the circuitry performs a primary transform on a derived prediction error, performs a secondary transform on a result of the primary transform, quantizes a result of the secondary transform, and encodes a result of the quantization as data of an image. When a current block to be processed has a predetermined shape, the encoder performs the secondary transform using, among secondary transform basis candidates that are secondary bases usable in the secondary transform, only a secondary transform basis candidate having a size that is not largest size containable in the current block.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: July 20, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
    Inventors: Ryuichi Kanoh, Tadamasa Toma, Kiyofumi Abe, Takahiro Nishi
  • Patent number: 11064195
    Abstract: In one example, a device includes a memory configured to store video data, and one or more processing units implemented in circuitry configured to construct a plurality of filters for classes of blocks of a current picture of the video data, wherein to construct the plurality of filters, the one or more processing units are configured to generate a plurality of sets of filter coefficients, and for a subset of the plurality of filters, determine respective indexes that identify one of the sets of filter coefficients for the corresponding filter of the subset; decode a current block of the current picture, determine a class for the current block, select a filter of the plurality of filters that corresponds to the class for the current block, and filter at least one pixel of the current block using the selected filter.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: July 13, 2021
    Assignee: QUALCOMM Incorporated
    Inventors: Marta Karczewicz, Wei-Jung Chien, Li Zhang
  • Patent number: 11064198
    Abstract: An image coding apparatus configured to divide an image into one or more slices each including a plurality of blocks and to code each slice on a block-by-block basis includes a first coding unit configured to code blocks included in a first portion of the slice, and a second coding unit configured to code blocks included in a second portion of the slice, wherein, when the second coding unit codes an initial block in the second portion, the second coding unit codes the initial included in the second portion by referring to a first quantization parameter provided to the slice as an initial value and referred to by the first coding unit when the first coding units codes the initial block in the first portion.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: July 13, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Koji Okawa
  • Patent number: RE48761
    Abstract: A method includes encoding video at a first bitrate to produce first encoded sections, and at a second bitrate that is less than the first bitrate to produce second encoded sections. The method further includes measuring levels of objective quality, indicative of perceptual quality, of the first and second encoded sections. The method includes determining, based on the measured objective quality levels, replaceable sections among the first encoded sections, and replacement sections among the second encoded sections, each of the replacement sections to replace a corresponding one of the replaceable sections. the method includes streaming the first encoded sections except for the replaceable sections, and the replacement sections instead of their corresponding replaceable sections.
    Type: Grant
    Filed: April 11, 2018
    Date of Patent: September 28, 2021
    Assignee: DIVX, LLC
    Inventors: Abhishek Shivadas, William David Amidei