Patents by Inventor Shaw-Min Lei
Shaw-Min Lei 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).
-
Patent number: 11863710Abstract: An audio device is provided. The audio device includes processing circuitry which is connected to a loudspeaker and a microphone. The processing circuitry is configured to play an echo reference signal from a far end on the loudspeaker, and perform an acoustic echo cancellation (AEC) process using the echo reference signal and an acoustic signal received by the microphone using an AEC adaptive filter. The processing circuitry repeatedly determines a first status of the loudspeaker according to a relation between the played echo reference signal and the received acoustic signal, and transmits a first status signal indicating the first status of the loudspeaker to the far end through a cloud network.Type: GrantFiled: November 1, 2021Date of Patent: January 2, 2024Assignee: MEDIATEK INC.Inventors: Shaw-Min Lei, Yiou-Wen Cheng, Liang-Che Sun
-
Publication number: 20230133061Abstract: An audio device is provided. The audio device includes processing circuitry which is connected to a loudspeaker and a microphone. The processing circuitry is configured to play an echo reference signal from a far end on the loudspeaker, and perform an acoustic echo cancellation (AEC) process using the echo reference signal and an acoustic signal received by the microphone using an AEC adaptive filter. The processing circuitry repeatedly determines a first status of the loudspeaker according to a relation between the played echo reference signal and the received acoustic signal, and transmits a first status signal indicating the first status of the loudspeaker to the far end through a cloud network.Type: ApplicationFiled: November 1, 2021Publication date: May 4, 2023Inventors: Shaw-Min LEI, Yiou-Wen CHENG, Liang-Che SUN
-
Publication number: 20220256145Abstract: Methods and apparatus for loop-filter processing of reconstructed video are disclosed. According to one method, multiple CC-ALF (Cross-Component Adaptive Loop Filter) filters are used. Selection of the multiple CC-ALF filters can be signalled in one APS (Adaptation Parameter Set). According to another method, the CC-ALF can be implemented according to the difference between a to-be-process sample and its neighbouring sample.Type: ApplicationFiled: July 24, 2020Publication date: August 11, 2022Inventors: Yu-Wen HUANG, Chih-Wei HSU, Ching-Yeh CHEN, Tzu-Der CHUANG, Shaw-Min LEI
-
Publication number: 20210281846Abstract: A method and apparatus for processing transform blocks of video data performed by a video encoder or a video decoder are disclosed. A plurality of quantization matrix sets are determined, where each quantization matrix set includes one or more quantization matrices corresponding to different block types. For a transform block corresponding to a current block in a current picture, a selected quantization matrix set is determined from the plurality of quantization matrix sets for the transform block. Quantization process or de-quantization process is applied to the transform block using a corresponding quantization matrix from the selected quantization matrix set.Type: ApplicationFiled: September 13, 2016Publication date: September 9, 2021Inventors: Shih-Ta HSIANG, Shaw-Min LEI, Yu-Wen HUANG, Yu-Chen SUN
-
Patent number: 11032550Abstract: In one example, a method for video coding includes receiving input data associated with a current block in an image frame, generating an inter predictor of the current block, and generating an intra predictor of the current block based on samples of neighboring pixels and an intra prediction mode that locates the samples of neighboring pixels. The method further includes generating a final predictor of the current block by combining the inter predictor and the intra predictor according to one or more intra weight coefficients associated with the intra prediction mode, and encoding or decoding the current block based on the final predictor to output encoded video data or a decoded block. The one or more intra weight coefficients indicate one or more ratios that corresponding one or more portions of the intra predictor are combined with the inter predictor, respectively.Type: GrantFiled: February 23, 2017Date of Patent: June 8, 2021Assignee: MEDIATEK INC.Inventors: Jing Ye, Shan Liu, Shaw-Min Lei
-
Patent number: 10798392Abstract: A method of video coding using palette coding mode for color video in a non-444 color format is disclosed. The non-444 video data can be converted to the 444 format so that the palette designed for the 444 format can be used for the non-444 video data. For the 4:2:0 color format, each chroma sample collocated with corresponding quad luma samples is padded with three chroma samples to form converted quad chroma samples. For the 4:2:0 color format, if a current pixel does not belong to the color palette, one or more escape values are signaled for the current pixel and the escape value associated with the chroma sample of the current pixel for each color component is not signaled for three of the quad chroma sample locations collocated with corresponding quad luma samples.Type: GrantFiled: September 11, 2019Date of Patent: October 6, 2020Assignee: HFI INNOVATION INC.Inventors: Shan Liu, Jing Ye, Xiaozhong Xu, Jungsun Kim, Wang-Lin Lai, Shaw-Min Lei
-
Patent number: 10701355Abstract: A method and apparatus for intra prediction for a current block using directional intra prediction based on neighboring pixels around the current block are disclosed. Embodiment according to the present invention derives the gradient for the current pixel from the neighboring reconstructed pixels along a prediction direction of directional intra prediction. The gradient derived is used to form the final intra prediction. In another embodiment of the present invention, the intra prediction for slant vertical and horizontal directions is derived based on the neighboring reconstructed pixels in a neighboring row adjacent to the top side of the current block and the neighboring reconstructed pixels in a neighboring column adjacent to the left side of the current block.Type: GrantFiled: April 9, 2019Date of Patent: June 30, 2020Assignee: HFI INNOVATION INC.Inventors: Mei Guo, Xin Zhao, Xun Guo, Shaw-Min Lei
-
Patent number: 10687058Abstract: A method for intra prediction mode decoding for a current block based on multi-level most probable mode (MPM) sets. The method includes determining one or more MPM candidates for a first-level MPM set, and determining one or more most probable remaining mode (MPRM) candidates for a second-level MPM set. Wherein the one or more MPRM candidates are identified based on a mode of a neighboring block of the current block, and the one or more MPRM candidates are different from any MPM candidate in the first-level MPM set. The method also includes decoding syntax information related to a current intra prediction mode corresponding to the current block according to the multi-level MPM sets using a decoder, and decoding the current block based on the determined current intra prediction mode.Type: GrantFiled: May 28, 2019Date of Patent: June 16, 2020Assignee: HFI INNOVATION INC.Inventors: Tzu-Der Chuang, Ching-Yeh Chen, Yu-Wen Huang, Shan Liu, Zhi Zhou, Shaw-Min Lei
-
Patent number: 10638156Abstract: According to at least one aspect, a method for predictive Intra coding is provided. The method comprises: determining a set of Intra prediction modes used for prediction unit (PU) blocks with a plurality of different block sizes comprising a 4×4 block size and at least two other block sizes; applying predictive Intra coding to a first PU block having a first block size that matches a block size in the plurality of different block sizes based on one or more neighboring PU blocks according to a first Intra prediction mode selected from the set of Intra prediction modes; and applying predictive Intra coding to a second PU block having a second block size that is different from the first block size and matches a block size in the plurality of different block sizes according to a second Intra prediction mode selected from the set of Intra prediction modes.Type: GrantFiled: January 9, 2019Date of Patent: April 28, 2020Assignee: HFI Innovation Inc.Inventors: Mei Guo, Shan Liu, Shaw-Min Lei
-
Patent number: 10567751Abstract: In one embodiment, a method receives a video bitstream corresponding to compressed video, wherein Filter Unit (FU) based in-loop filtering is allowed in a reconstruction loop associated with the compressed video. The method then derives reconstructed video from the video bitstream, wherein the reconstructed video is partitioned into FUs and derives a merge flag from the video bitstream for each of the FUs, wherein the merge flag indicates whether said each of the FUs is merged with a neighboring FU. The method further receives a merge index from the video bitstream if the merge flag indicates that said each of the FUs is merged, and receives the filter parameters from the video bitstream if the merge flag indicates that said each of the FUs is not merged. Finally, the method applies the in-loop filtering to said each of the FUs using the filter parameters.Type: GrantFiled: December 14, 2017Date of Patent: February 18, 2020Assignee: HFI INNOVATION INC.Inventors: Ching-Yeh Chen, Chih-Ming Fu, Chia-Yang Tsai, Yu-Wen Huang, Shaw-Min Lei
-
Publication number: 20200007875Abstract: A method of video coding using palette coding mode for color video in a non-444 color format is disclosed. The non-444 video data can be converted to the 444 format so that the palette designed for the 444 format can be used for the non-444 video data. For the 4:2:0 color format, each chroma sample collocated with corresponding quad luma samples is padded with three chroma samples to form converted quad chroma samples. For the 4:2:0 color format, if a current pixel does not belong to the color palette, one or more escape values are signaled for the current pixel and the escape value associated with the chroma sample of the current pixel for each color component is not signaled for three of the quad chroma sample locations collocated with corresponding quad luma samples.Type: ApplicationFiled: September 11, 2019Publication date: January 2, 2020Inventors: Shan LIU, Jing YE, Xiaozhong XU, Jungsun KIM, Wang-Lin LAI, Shaw-Min LEI
-
Patent number: 10511843Abstract: A method and apparatus for loop filter processing of video data in a video encoder or decoder are disclosed. Embodiments according to the present invention conditionally allow sharing of loop filter parameters. In one embodiment, sharing of loop filter information between the current block and a neighboring block is determined according to a condition. If the condition indicates that sharing of loop filter information is allowed, a merge flag is coded and incorporated in the video bitstream in an encoder, and a merge flag is parsed from the video bitstream and decoded in a decoder. In one embodiment, the condition depends on region partitioning of the picture, where region partitioning partitions the picture into regions and the region may correspond to a slice or a tile. The condition is set to indicate that sharing of loop filter information is allowed if the block and the neighboring block are in a same slice/tile.Type: GrantFiled: February 22, 2013Date of Patent: December 17, 2019Assignee: HFI Innovation Inc.Inventors: Chih-Ming Fu, Chia-Yang Tsai, Chih-Wei Hsu, Ching-Yeh Chen, Yu-Wen Huang, Shaw-Min Lei
-
Patent number: 10484680Abstract: The present disclosure describes a method of decoding a block, and the method includes receiving a flag indicating whether a current intra prediction mode is equal to any of one or more most probable modes, deriving, based on a value of the flag, the current intra prediction mode from a decoded mode index, and decoding the block according to the current intra prediction mode. The current intra prediction mode belongs to a mode set that includes a DC mode, a Planar mode, and at least one directional mode. The deriving the current intra prediction mode includes, when the mode index corresponds to a first mode index value representing the Planar mode, deriving the current intra prediction mode to be the Planar mode; and, when the mode index corresponds to a second mode index value representing the DC mode, deriving the current intra prediction mode to be the DC mode.Type: GrantFiled: July 31, 2018Date of Patent: November 19, 2019Assignee: HFI INNOVATION INC.Inventors: Mei Guo, Xun Guo, Shaw-Min Lei
-
Patent number: 10477234Abstract: A method and apparatus derive a motion vector predictor (MVP) candidate set for a block. Embodiments according to the present invention determine a plurality of spatial neighboring blocks of the block, obtain one or more spatial MVP candidates from motion vectors associated with the spatial neighboring blocks, determine whether one or more redundant MVP candidates exist in the spatial MVP candidates, generate a first MVP candidate set, wherein said generating the first MVP candidate set comprises not including the determined one or more redundant MVP candidates into the first MVP candidate set, and generate a final MVP candidate set according to the first MVP candidate set.Type: GrantFiled: November 5, 2018Date of Patent: November 12, 2019Assignee: HFI INNOVATION INC.Inventors: Tzu-Der Chuang, Jian-Liang Lin, Yu-Wen Huang, Shaw-Min Lei
-
Patent number: 10462475Abstract: A method of video coding using palette coding mode for color video in a non-444 color format is disclosed. The non-444 video data can be converted to the 444 format so that the palette designed for the 444 format can be used for the non-444 video data. For the 4:2:0 color format, each chroma sample collocated with corresponding quad luma samples is padded with three chroma samples to form converted quad chroma samples. For the 4:2:0 color format, if a current pixel does not belong to the color palette, one or more escape values are signaled for the current pixel and the escape value associated with the chroma sample of the current pixel for each color component is not signaled for three of the quad chroma sample locations collocated with corresponding quad luma samples.Type: GrantFiled: December 16, 2015Date of Patent: October 29, 2019Assignee: HFI INNOVATION INC.Inventors: Shan Liu, Jing Ye, Xiaozhong Xu, Jungsun Kim, Wang-Lin Lai, Shaw-Min Lei
-
Publication number: 20190281292Abstract: A method for intra prediction mode decoding for a current block based on multi-level most probable mode (MPM) sets. The method includes determining one or more MPM candidates for a first-level MPM set, and determining one or more most probable remaining mode (MPRM) candidates for a second-level MPM set. Wherein the one or more MPRM candidates are identified based on a mode of a neighboring block of the current block, and the one or more MPRM candidates are different from any MPM candidate in the first-level MPM set. The method also includes decoding syntax information related to a current intra prediction mode corresponding to the current block according to the multi-level MPM sets using a decoder, and decoding the current block based on the determined current intra prediction mode.Type: ApplicationFiled: May 28, 2019Publication date: September 12, 2019Applicant: HFI INNOVATION INC.Inventors: Tzu-Der CHUANG, Ching-Yeh CHEN, Yu-Wen HUANG, Shan LIU, Zhi ZHOU, Shaw-Min LEI
-
Patent number: 10405004Abstract: A method and apparatus for processing reconstructed video using in-loop filter in a video coding system are disclosed. The method uses chroma in-loop filter indication to indicate whether chroma components are processed by in-loop filter when the luma in-loop filter indication indicates that in-loop filter processing is applied to the luma component. An additional flag may be used to indicate whether the in-loop filter processing is applied to an entire picture using same in-loop filter information or each block of the picture using individual in-loop filter information. Various embodiments according to the present invention to increase efficiency are disclosed, wherein various aspects of in-loop filter information are taken into consideration for efficient coding such as the property of quadtree-based partition, boundary conditions of a block, in-loop filter information sharing between luma and chroma components, indexing to a set of in-loop filter information, and prediction of in-loop filter information.Type: GrantFiled: February 4, 2016Date of Patent: September 3, 2019Assignee: HFI INNOVATION INC.Inventors: Chih-Ming Fu, Ching-Yeh Chen, Chia-Yang Tsai, Yu-Wen Huang, Shaw-Min Lei
-
Publication number: 20190238836Abstract: A method and apparatus for intra prediction for a current block using directional intra prediction based on neighboring pixels around the current block are disclosed. Embodiment according to the present invention derives the gradient for the current pixel from the neighboring reconstructed pixels along a prediction direction of directional intra prediction. The gradient derived is used to form the final intra prediction. In another embodiment of the present invention, the intra prediction for slant vertical and horizontal directions is derived based on the neighboring reconstructed pixels in a neighboring row adjacent to the top side of the current block and the neighboring reconstructed pixels in a neighboring column adjacent to the left side of the current block.Type: ApplicationFiled: April 9, 2019Publication date: August 1, 2019Inventors: Mei GUO, Xin ZHAO, Xun GUO, Shaw-Min LEI
-
Patent number: 10368095Abstract: According to at least one aspect, a method for predictive Intra coding is provided. The method comprises: determining a set of Intra prediction modes used for prediction unit (PU) blocks with a plurality of different block sizes comprising a 4×4 block size and at least two other block sizes; applying predictive Intra coding to a first PU block having a first block size that matches a block size in the plurality of different block sizes based on one or more neighboring PU blocks according to a first Intra prediction mode selected from the set of Intra prediction modes; and applying predictive Intra coding to a second PU block having a second block size that is different from the first block size and matches a block size in the plurality of different block sizes according to a second Intra prediction mode selected from the set of Intra prediction modes.Type: GrantFiled: February 20, 2018Date of Patent: July 30, 2019Assignee: HFI Innovation Inc.Inventors: Mei Guo, Shan Liu, Shaw-Min Lei
-
Patent number: 10327010Abstract: An encoder for receiving a video frame and performing encoding processes to generate an encoded bitstream includes: a fidelity enhancement block, for performing a fidelity enhancement technique on processed data utilizing a partition method, and generating fidelity enhancement information comprising at least one parameter associated with a partition structure, wherein the fidelity enhancement technique comprises applying discrepancy modeling based on DC offset; and an entropy coding block, coupled to the fidelity enhancement block, for encoding the fidelity enhancement information, and embedding the encoded fidelity enhancement information into the encoded bitstream.Type: GrantFiled: February 5, 2015Date of Patent: June 18, 2019Assignee: HFI Innovation Inc.Inventors: Shaw-Min Lei, Yu-Wen Huang, Xun Guo