Patents by Inventor Zhenzhong Chen
Zhenzhong Chen 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: 11949856Abstract: A method of controlling intra prediction for decoding or encoding of a video sequence, is performed by at least one processor and includes obtaining intra prediction modes including directional modes respectively corresponding to angular prediction directions, a first amount of one or more of the directional modes being excluded from the intra prediction modes based on a second amount of the intra prediction modes and a third amount of most probable modes (MPMs). The method further includes selecting, as the MPMs, two or more of the intra prediction modes from which the one or more of the directional modes are excluded, and selecting, for decoding the video sequence, one of the intra prediction modes from which the one or more of the directional modes are excluded.Type: GrantFiled: July 7, 2021Date of Patent: April 2, 2024Assignee: TENCENT AMERICA LLCInventors: Xiaozhong Xu, Shan Liu, Yiming Li, Zhenzhong Chen
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Patent number: 11949853Abstract: A data decoding method, performed by a computer device, is provided. The data decoding method includes obtaining coded data corresponding to a current to-be-decoded unit, obtaining a coding mode restriction type corresponding to the current to-be-decoded unit by decoding the coded data, determining a candidate coding mode set corresponding to the current to-be-decoded unit according to the coding mode restriction type, the candidate coding mode set comprising a block copy intra-frame coding mode, selecting a target coding mode from the candidate coding mode set, and decoding the current to-be-decoded unit according to the target coding mode, thereby obtaining corresponding decoded data.Type: GrantFiled: September 9, 2021Date of Patent: April 2, 2024Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LTDInventors: Yiming Li, Xiaozhong Xu, Ye Hu, Shan Liu, Zhenzhong Chen
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Patent number: 11949862Abstract: An apparatus for video decoding includes receiving and processing circuitry. The circuitry is configured to receive a bitstream including a syntax element associated with a parent coding unit (CU) in a picture indicating the parent CU is partitioned into a predefined set of child CUs without performing a recursive tree-structure-based partitioning, and process the child CUs according to the indication of the syntax element to reconstruct the picture. In an embodiment, at least two subdivisions need to be performed when the parent CU is partitioned using the recursive tree-structure-based partitioning in order to obtain the same set of child CUs. In an embodiment, at least one of the child CUs has a size larger than a minimum allowed CU size for partitioning the parent CU and includes no syntax element to indicate whether the at least one of the child CUs is to be further subdivided.Type: GrantFiled: October 14, 2021Date of Patent: April 2, 2024Assignee: TENCENT AMERICA LLCInventors: Shan Liu, Zhenzhong Chen, Sijia Chen, Yiming Li
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Patent number: 11601654Abstract: A method of controlling intra prediction for decoding or encoding of a video sequence, is by at least one processor and includes obtaining an index of an intra prediction mode of a current block of the video sequence, obtaining a coefficient scanning direction based on the obtained index, using a first look up table indicating a mapping between a plurality of indices of a plurality of intra prediction modes and respective coefficient scanning directions, and performing a coefficient scanning of the current block, based on the obtained coefficient scanning direction.Type: GrantFiled: July 1, 2021Date of Patent: March 7, 2023Assignee: TENCENT AMERICA LLCInventors: Yiming Li, Xiaozhong Xu, Zhenzhong Chen, Shan Liu
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Publication number: 20220038697Abstract: An apparatus for video decoding includes receiving and processing circuitry. The circuitry is configured to receive a bitstream including a syntax element associated with a parent coding unit (CU) in a picture indicating the parent CU is partitioned into a predefined set of child CUs without performing a recursive tree-structure-based partitioning, and process the child CUs according to the indication of the syntax element to reconstruct the picture. In an embodiment, at least two subdivisions need to be performed when the parent CU is partitioned using the recursive tree-structure-based partitioning in order to obtain the same set of child CUs. In an embodiment, at least one of the child CUs has a size larger than a minimum allowed CU size for partitioning the parent CU and includes no syntax element to indicate whether the at least one of the child CUs is to be further subdivided.Type: ApplicationFiled: October 14, 2021Publication date: February 3, 2022Applicant: TENCENT AMERICA LLCInventors: Shan LIU, Zhenzhong CHEN, Sijia CHEN, Yiming LI
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Patent number: 11240499Abstract: An apparatus for video decoding includes receiving and processing circuitry. The circuitry is configured to receive a bitstream including a syntax element associated with a parent coding unit (CU) in a picture indicating the parent CU is partitioned into a predefined set of child CUs without performing a recursive tree-structure-based partitioning, and process the child CUs according to the indication of the syntax element to reconstruct the picture. In an embodiment, at least two subdivisions need to be performed when the parent CU is partitioned using the recursive tree-structure-based partitioning in order to obtain the same set of child CUs. In an embodiment, at least one of the child CUs has a size larger than a minimum allowed CU size for partitioning the parent CU and includes no syntax element to indicate whether the at least one of the child CUs is to be further subdivided.Type: GrantFiled: May 20, 2020Date of Patent: February 1, 2022Assignee: Tencent America LLCInventors: Shan Liu, Zhenzhong Chen, Sijia Chen, Yiming Li
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Patent number: 11223837Abstract: Methods of adaptive transform type based on transform unit (TU) size for enhancement layer (EL) coding and multiple motion candidates for EL coding based on corresponding base layer (BL) video data are provided. One method selects a transform type from multiple allowable transform types based on the TU size and applies the selected transform type to the transform units of the inter-layer prediction processed data. Another method derives multiple motion candidates for the EL video data coded in Merge mode or Inter mode based on motion information associated with the corresponding BL video data.Type: GrantFiled: August 20, 2019Date of Patent: January 11, 2022Assignee: MediaTek Inc.Inventors: Tzu-Der Chuang, Zhenzhong Chen, Shan Liu, Ching-Yeh Chen, Chih-Wei Hsu
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Publication number: 20210409688Abstract: A data decoding method, performed by a computer device, is provided. The data decoding method includes obtaining coded data corresponding to a current to-be-decoded unit, obtaining a coding mode restriction type corresponding to the current to-be-decoded unit by decoding the coded data, determining a candidate coding mode set corresponding to the current to-be-decoded unit according to the coding mode restriction type, the candidate coding mode set comprising a block copy intra-frame coding mode, selecting a target coding mode from the candidate coding mode set, and decoding the current to-be-decoded unit according to the target coding mode, thereby obtaining corresponding decoded data.Type: ApplicationFiled: September 9, 2021Publication date: December 30, 2021Applicant: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LTDInventors: Yiming LI, Xiaozhong XU, Ye HU, Shan LIU, Zhenzhong CHEN
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Publication number: 20210337190Abstract: A method of controlling intra prediction for decoding or encoding of a video sequence, is performed by at least one processor and includes obtaining intra prediction modes including directional modes respectively corresponding to angular prediction directions, a first amount of one or more of the directional modes being excluded from the intra prediction modes based on a second amount of the intra prediction modes and a third amount of most probable modes (MPMs). The method further includes selecting, as the MPMs, two or more of the intra prediction modes from which the one or more of the directional modes are excluded, and selecting, for decoding the video sequence, one of the intra prediction modes from which the one or more of the directional modes are excluded.Type: ApplicationFiled: July 7, 2021Publication date: October 28, 2021Applicant: TENCENT AMERICA LLCInventors: Xiaozhong XU, Shan Liu, Yiming Li, Zhenzhong Chen
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Publication number: 20210329262Abstract: A method of controlling intra prediction for decoding or encoding of a video sequence, is by at least one processor and includes obtaining an index of an intra prediction mode of a current block of the video sequence, obtaining a coefficient scanning direction based on the obtained index, using a first look up table indicating a mapping between a plurality of indices of a plurality of intra prediction modes and respective coefficient scanning directions, and performing a coefficient scanning of the current block, based on the obtained coefficient scanning direction.Type: ApplicationFiled: July 1, 2021Publication date: October 21, 2021Applicant: TENCENT AMERICA LLCInventors: Yiming LI, Xiaozhong XU, Zhenzhong CHEN, Shan LIU
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Patent number: 11109023Abstract: A method of controlling intra prediction for decoding or encoding of a video sequence, is performed by at least one processor and includes obtaining intra prediction modes including directional modes respectively corresponding to angular prediction directions, a first amount of one or more of the directional modes being excluded from the intra prediction modes based on a second amount of the intra prediction modes and a third amount of most probable modes (MPMs). The method further includes selecting, as the MPMs, two or more of the intra prediction modes from which the one or more of the directional modes are excluded, and selecting, for decoding the video sequence, one of the intra prediction modes from which the one or more of the directional modes are excluded.Type: GrantFiled: November 19, 2019Date of Patent: August 31, 2021Assignee: TENCENT AMERICA LLCInventors: Xiaozhong Xu, Shan Liu, Yiming Li, Zhenzhong Chen
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Patent number: 11102490Abstract: A method of controlling intra prediction for decoding or encoding of a video sequence, is by at least one processor and includes obtaining an index of an intra prediction mode of a current block of the video sequence, obtaining a coefficient scanning direction based on the obtained index, using a first look up table indicating a mapping between a plurality of indices of a plurality of intra prediction modes and respective coefficient scanning directions, and performing a coefficient scanning of the current block, based on the obtained coefficient scanning direction.Type: GrantFiled: December 18, 2019Date of Patent: August 24, 2021Assignee: TENCENT AMERICA LLCInventors: Yiming Li, Xiaozhong Xu, Zhenzhong Chen, Shan Liu
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Patent number: 11012711Abstract: A method of controlling intra prediction for decoding or encoding of a video sequence, is performed by at least one processor and includes identifying whether a first intra prediction mode of an above neighboring block of a prediction block is different than a second intra prediction mode of a left neighboring block of the prediction block. The method further includes, based on the first intra prediction mode being identified to be not different than the second intra prediction mode, obtaining a most probable mode (MPM) list including the first intra prediction mode, first immediate modes immediate to the first intra prediction mode and one among second immediate modes respectively immediate to the first immediate modes, and performing the intra prediction on multiple reference lines of the prediction block, using the obtained MPM list, the multiple reference lines being without a first reference line closest to the prediction block.Type: GrantFiled: November 20, 2019Date of Patent: May 18, 2021Assignee: TENCENT AMERICA LLCInventors: Xiaozhong Xu, Shan Liu, Yingbin Wang, Zhenzhong Chen
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Publication number: 20200374520Abstract: An apparatus for video decoding includes receiving and processing circuitry. The circuitry is configured to receive a bitstream including a syntax element associated with a parent coding unit (CU) in a picture indicating the parent CU is partitioned into a predefined set of child CUs without performing a recursive tree-structure-based partitioning, and process the child CUs according to the indication of the syntax element to reconstruct the picture. In an embodiment, at least two subdivisions need to be performed when the parent CU is partitioned using the recursive tree-structure-based partitioning in order to obtain the same set of child CUs. In an embodiment, at least one of the child CUs has a size larger than a minimum allowed CU size for partitioning the parent CU and includes no syntax element to indicate whether the at least one of the child CUs is to be further subdivided.Type: ApplicationFiled: May 20, 2020Publication date: November 26, 2020Applicant: Tencent America LLCInventors: Shan LIU, Zhenzhong CHEN, Sijia CHEN, Yiming LI
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Patent number: 10820004Abstract: In a method and apparatus for predictive Intra coding of a non-square block using modified mode-dependent coefficient scanning (MDCS), the modified MDCS is derived from the MDCS that is designed for a square block. The mapped Intra modes for the non-square block are derived by mapping the Intra modes for the square block to the mapped Intra modes for the non-square block. The mapped Intra modes are divided into multiple groups including a first modified angular group and a second modified angular group. The modified MDCS modifies the number of the mapped Intra modes in the first modified angular group or the second modified angular group by comparing an angle spanned by the mapped Intra modes in the first modified angular group or the second modified angular group with the angle spanned by the corresponding Intra modes of the conventional MDCS.Type: GrantFiled: March 27, 2018Date of Patent: October 27, 2020Assignee: MEDIATEK SINGAPORE PTE. LTD.Inventors: Shan Liu, Zhenzhong Chen
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Publication number: 20200213597Abstract: A method of controlling intra prediction for decoding or encoding of a video sequence, is by at least one processor and includes obtaining an index of an intra prediction mode of a current block of the video sequence, obtaining a coefficient scanning direction based on the obtained index, using a first look up table indicating a mapping between a plurality of indices of a plurality of intra prediction modes and respective coefficient scanning directions, and performing a coefficient scanning of the current block, based on the obtained coefficient scanning direction.Type: ApplicationFiled: December 18, 2019Publication date: July 2, 2020Applicant: TENCENT AMERICA LLCInventors: Yiming LI, Xiaozhong XU, Zhenzhong CHEN, Shan LIU
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Publication number: 20200177914Abstract: A method of controlling intra prediction for decoding or encoding of a video sequence, is performed by at least one processor and includes identifying whether a first intra prediction mode of an above neighboring block of a prediction block is different than a second intra prediction mode of a left neighboring block of the prediction block. The method further includes, based on the first intra prediction mode being identified to be not different than the second intra prediction mode, obtaining a most probable mode (MPM) list including the first intra prediction mode, first immediate modes immediate to the first intra prediction mode and one among second immediate modes respectively immediate to the first immediate modes, and performing the intra prediction on multiple reference lines of the prediction block, using the obtained MPM list, the multiple reference lines being without a first reference line closest to the prediction block.Type: ApplicationFiled: November 20, 2019Publication date: June 4, 2020Applicant: TENCENT AMERICA LLCInventors: Xiaozhong XU, Shan Liu, Yingbin Wang, Zhenzhong Chen
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Publication number: 20200169729Abstract: A method of controlling intra prediction for decoding or encoding of a video sequence, is performed by at least one processor and includes obtaining intra prediction modes including directional modes respectively corresponding to angular prediction directions, a first amount of one or more of the directional modes being excluded from the intra prediction modes based on a second amount of the intra prediction modes and a third amount of most probable modes (MPMs). The method further includes selecting, as the MPMs, two or more of the intra prediction modes from which the one or more of the directional modes are excluded, and selecting, for decoding the video sequence, one of the intra prediction modes from which the one or more of the directional modes are excluded.Type: ApplicationFiled: November 19, 2019Publication date: May 28, 2020Applicant: TENCENT AMERICA LLCInventors: Xiaozhong XU, Shan LIU, Yiming LI, Zhenzhong CHEN
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Patent number: D881433Type: GrantFiled: August 12, 2018Date of Patent: April 14, 2020Inventor: Zhenzhong Chen
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Patent number: D915575Type: GrantFiled: August 8, 2018Date of Patent: April 6, 2021Inventor: Zhenzhong Chen