Patents by Inventor Weijia XU
Weijia XU has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11991382Abstract: Motion Vector Management for Decoder Side Motion Vector Refinement is disclosed. A method of video processing including: determining, for a conversion between a first block of video and a bitstream representation of the first block of video, whether and/or how to apply decoder-side motion vector refinement (DMVR) based on a signaled information; and performing the conversion based on the determination.Type: GrantFiled: September 1, 2021Date of Patent: May 21, 2024Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD, BYTEDANCE INC.Inventors: Weijia Zhu, Hongbin Liu, Kai Zhang, Li Zhang, Jizheng Xu, Yue Wang
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Patent number: 11985329Abstract: An example method of video processing includes performing a conversion between a block of a chroma component of a video and a bitstream representation of the video. During the conversion, a deblocking filter process is applied to at least some samples along an edge of the block, and wherein chroma quantization parameter (QP) offsets are added to outputs from a chroma QP table to determine parameters for the deblocking filter process.Type: GrantFiled: March 14, 2022Date of Patent: May 14, 2024Assignee: BYTEDANCE INC.Inventors: Weijia Zhu, Li Zhang, Jizheng Xu
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Patent number: 11985323Abstract: Video coding and decoding methods are described. An example method includes determining, based on an applicability rule, that a differential coding mode is applicable to a conversion between a chroma video block of a video and a bitstream representation of the chroma video block, and performing, based on the determining, the conversion between the chroma video block and the bitstream representation of the chroma video block using the differential coding mode, where the chroma video block is represented in the bitstream representation using a difference between a quantized residual of an intra prediction of the chroma video block and a prediction of the quantized residual in the differential coding mode, where the intra prediction is performed in a first direction and the prediction of the quantized residual is performed in a second direction, and where the difference is represented using a differential pulse coding modulation (DPCM) representation.Type: GrantFiled: August 4, 2022Date of Patent: May 14, 2024Assignee: BYTEDANCE INC.Inventors: Weijia Zhu, Li Zhang, Jizheng Xu, Hsiao Chiang Chuang
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Patent number: 11979557Abstract: Devices, systems and methods for video processing are described. An example method for video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, a number of intra-coded neighboring blocks of the current block for a combined inter and intra prediction mode according to a rule that specifies a manner of treating a block coded using a palette coding mode in counting the number of intra-coded neighboring blocks for the combined inter and intra prediction mode. The method also includes performing the conversion based on the determining.Type: GrantFiled: January 27, 2022Date of Patent: May 7, 2024Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., BYTEDANCE INC.Inventors: Weijia Zhu, Li Zhang, Jizheng Xu, Kai Zhang, Hongbin Liu, Yue Wang
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Patent number: 11979610Abstract: Devices, systems and methods for coefficient coding in transform skip mode are described. An exemplary method for visual media processing includes: for encoding a current video block in a video region of a visual media data into a bitstream representation of the visual media data, identifying usage of a coding mode and/or an intra prediction mode and/or a set of allowable intra prediction modes; and upon identifying the usage, making a decision of whether to include or exclude, in the bitstream representation, a syntax element indicative of selectively applying a transform skip mode to the current video block, wherein, in the transform skip mode, a residual of a prediction error between the current video block and a reference video block is represented in the bitstream representation of the visual media data without applying a transformation.Type: GrantFiled: October 6, 2021Date of Patent: May 7, 2024Assignee: BYTEDANCE INC.Inventors: Weijia Zhu, Li Zhang, Jizheng Xu
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Publication number: 20240146929Abstract: Devices, systems, and methods for palette mode coding are described. An exemplary method for video processing includes performing a conversion between a block of a video and a bitstream representation of the video. The bitstream representation is processed according to a format rule that specifies a first indication of usage of a palette mode and a second indication of usage of an intra block copy (IBC) mode are signaled dependent of each other.Type: ApplicationFiled: October 17, 2023Publication date: May 2, 2024Inventors: Weijia Zhu, Li Zhang, Jizheng Xu, Kai Zhang, Hongbin Liu, Yue Wang
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Patent number: 11973959Abstract: An example method of video processing includes determining, for a conversion between a block of a chroma component of a video and a bitstream representation of the video, whether or how to apply a filtering process to an edge of the block based on a first quantization information for a first video region comprising samples on one side of the edge and/or a second quantization information for a second video region comprising samples on the other side of the edge according to a rule that is based on a coding mode applicable to the block for coding the samples on the one side or the samples on the other side of the edge. The rule specifies that multiple QP offsets at different video unit levels are used to determine the first quantization information or the second quantization information. The method also includes performing the conversion based on the determining.Type: GrantFiled: March 14, 2022Date of Patent: April 30, 2024Assignee: BYTEDANCE INC.Inventors: Weijia Zhu, Li Zhang, Jizheng Xu
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Patent number: 11968361Abstract: In an exemplary aspect, a method for visual media processing includes identifying a boundary at a vertical edge and/or a horizontal edge of two video blocks; calculating a boundary strength of a filter based on at least one of the two video blocks crossing a vertical edge or a horizontal edge is coded using a combined intra-inter prediction (CIIP) mode; deciding whether to turn on or off the filter; selecting a strength of the filter in case the filter is turned on; and performing, based on the selecting, a deblocking filter (DB) process to the video blocks.Type: GrantFiled: November 10, 2021Date of Patent: April 23, 2024Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., BYTEDANCE INC.Inventors: Li Zhang, Weijia Zhu, Kai Zhang, Hongbin Liu, Jizheng Xu
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Publication number: 20240129527Abstract: In one example aspect, a method of video processing includes performing a conversion between a current block in a video unit of a video and a coded representation of the video using a palette mode in which a palette of representative sample values is used for coding the current block. During the conversion, a predictor palette is used for predicting the palette of representative sample values. The predictor palette is re-initialized upon a condition being satisfied. The condition is satisfied in case the video unit is a first video unit in a video unit row and a syntax element is included in the coded representation indicating that a wavefront parallel processing is enabled for the video unit.Type: ApplicationFiled: December 4, 2023Publication date: April 18, 2024Inventors: Li Zhang, Weijia Zhu, Jizheng Xu
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Publication number: 20240121381Abstract: Video coding and decoding methods are described. An example method includes performing a conversion between a current video block of a video and a bitstream representation of the current video block by determining a first intra coding mode to be stored which is associated with the current video block using a differential coding mode, where the first intra coding mode associated with the current video block is determined according to a second prediction mode used by the differential coding mode, and where, in the differential coding mode, a difference between a quantized residual of an intra prediction of the current video block and a prediction of the quantized residual is represented in the bitstream representation for the current video block using a differential pulse coding modulation (DPCM) representation.Type: ApplicationFiled: November 3, 2023Publication date: April 11, 2024Inventors: Weijia Zhu, Li Zhang, Jizheng Xu, Hsiao Chiang Chuang
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Publication number: 20240114156Abstract: A method for implementing an adaptive color transform (ACT) during image/video encoding and decoding, includes determining, for a conversion between a video including a block and a bitstream of the video, that a size of the block is greater than a maximum allowed size for an ACT mode, and performing, based on the determining, the conversion, wherein, in response to the size of the block being greater than the maximum allowed size for the ACT mode, the block is partitioned into multiple sub-blocks, and wherein each of the multiple sub-blocks share a same prediction mode, and the ACT mode is enabled at a sub-block level.Type: ApplicationFiled: November 30, 2023Publication date: April 4, 2024Inventors: Weijia Zhu, Jizheng Xu, Li Zhang, Kai Zhang, Yue Wang
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Publication number: 20240107037Abstract: Video processing methods, systems and appratrus are described. One example method includes performing a conversion between a video block of a video and a bitstream of the video using a palette mode in which samples of the video block are represented using a palette of representive color values. A size of the palette of the video block is determined based on whether a local dual tree is applied for the conversion.Type: ApplicationFiled: November 17, 2023Publication date: March 28, 2024Inventors: Jizheng Xu, Li Zhang, Ye-kui Wang, Kai Zhang, Weijia Zhu, Yue Wang, Yang Wang, Hongbin Liu
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Publication number: 20240107038Abstract: An example method of video processing includes determining, for a conversion between a chroma block of a video and a bitstream representation of the video, applicability of a deblocking filter process to at least some samples at an edge of the chroma block based on a mode of joint coding of chroma residuals for the chroma block. The method also includes performing the conversion based on the determining.Type: ApplicationFiled: November 27, 2023Publication date: March 28, 2024Inventors: Weijia Zhu, Li Zhang, Jizheng Xu, Kai Zhang
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Patent number: 11943481Abstract: Methods, systems, and devices for performing entropy coding for a palette escape symbol in palette mode coding and decoding are described. An example method for video processing includes performing a conversion between a video having one or more video regions including a current video block and a bitstream representation of the video, wherein the bitstream representation conforms to a format rule that the current video block is coded using a palette mode coding tool, wherein a binarization of an escape symbol for the current video block uses an exponential-Golomb (EG) code of order K, wherein K is a non-negative integer that is unequal to three, and wherein the palette mode coding tool represents the current video block using a palette of representative color values and wherein the escape symbol is used for a sample of the current video block coded without using the representative color values.Type: GrantFiled: October 13, 2022Date of Patent: March 26, 2024Assignee: BYTEDANCE INC.Inventors: Weijia Zhu, Jizheng Xu, Li Zhang, Hsiao Chiang Chuang
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Patent number: 11943439Abstract: A method for implementing an adaptive colour transform (ACT) mode during image/video encoding and decoding includes performing a conversion between a current video block of a video and a bitstream of the video, wherein the current video block is coded using the ACT mode, wherein the conversion comprises applying an inverse ACT transform on the current video block according to a rule, and wherein the rule specifies that a clipping operation, based on a bit depth of the current video block, is applied to an input of the inverse ACT transform.Type: GrantFiled: July 18, 2022Date of Patent: March 26, 2024Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD., BYTEDANCE INC.Inventors: Weijia Zhu, Jizheng Xu, Li Zhang, Kai Zhang, Ye-Kui Wang, Yue Wang
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Publication number: 20240089501Abstract: 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. 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: ApplicationFiled: November 10, 2023Publication date: March 14, 2024Inventors: Weijia Zhu, Jizheng Xu, Li Zhang, Yue Wang
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Patent number: 11924432Abstract: Devices, systems and methods for palette mode coding are described. An exemplary method for video processing includes performing a conversion between a block of a video and a bitstream representation of the video. The bitstream representation is processed according to a format rule that specifies a first indication of usage of a palette mode and a second indication of usage of an intra block copy (IBC) mode are signaled dependent of each other.Type: GrantFiled: January 11, 2022Date of Patent: March 5, 2024Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD, BYTEDANCE INC.Inventors: Weijia Zhu, Li Zhang, Jizheng Xu, Kai Zhang, Hongbin Liu, Yue Wang
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Publication number: 20240073419Abstract: A method of video processing, including performing a conversion between a video unit of a video and a bitstream of the video according to a rule, wherein the rule specifies that whether a cross-component adaptive loop filter (CC-ALF) mode and an adaptive loop filter (ALF) mode are enabled for coding the video unit are indicated in the bitstream in a mutually independent manner.Type: ApplicationFiled: October 31, 2023Publication date: February 29, 2024Inventors: Weijia Zhu, Li Zhang, Jizheng Xu, Kai Zhang, Ye-kui Wang
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Publication number: 20240073426Abstract: An example method of video processing includes determining, for a conversion between a block of a chroma component of a video and a bitstream representation of the video, whether or how to apply a filtering process to an edge of the block based on a first quantization information for a first video region including samples on one side of the edge and/or a second quantization information for a second video region including samples on the other side of the edge according to a rule that is based on a coding mode applicable to the block for coding the samples on the one side or the samples on the other side of the edge. The rule specifies that multiple QP offsets at different video unit levels are used to determine the first quantization information or the second quantization information. The method also includes performing the conversion based on the determining.Type: ApplicationFiled: October 31, 2023Publication date: February 29, 2024Inventors: Weijia Zhu, Li Zhang, Jizheng Xu
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Patent number: 11917197Abstract: Extensions of intra coding modes in video coding are described. One example is a method for video processing, comprising: generating, for a conversion between a current video block of a video and a bitstream representation of a video, a set of extended intra prediction modes (IPMs) associated with the current video block by revising a set of existing IPMs to include at least one new coding method, wherein the new coding method is different from coding methods in the existing IPMs and is to be treated as IPM; and performing the conversion based on the set of extended IPMs.Type: GrantFiled: February 25, 2022Date of Patent: February 27, 2024Assignees: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD, BYTEDANCE INC.Inventors: Weijia Zhu, Li Zhang, Jizheng Xu, Kai Zhang, Hongbin Liu, Yue Wang