Patents by Inventor Xin Zhao

Xin Zhao 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).

  • Calibration of a dual-path pulse width modulation system
    Patent number: 10181845
    Abstract: A system may include a digital pulse width modulator subsystem, a first path coupled to an output of the digital pulse width modulator subsystem and configured to drive an open-loop driver stage, a second path coupled to the output of the digital pulse width modulator subsystem and configured to drive a closed-loop analog pulse width modulator, a controller to select between the first path and the second path for processing a signal based on one or more characteristics of the signal, and a calibration subsystem configured to calibrate at least one of a first gain of the first path and a second gain of the second path in order that the first gain and the second gain are at least approximately equal at the time of switching selection between the first path and the second path or vice versa, in order to minimize artifacts due to the switching.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: January 15, 2019
    Assignee: Cirrus Logic, Inc.
    Inventors: Tejasvi Das, Alan Mark Morton, Xin Zhao, Lei Zhu, Xiaofan Fei, Johann G. Gaboriau, John L. Melanson, Amar Vellanki
  • MEMORY REDUCTION FOR NON-SEPARABLE TRANSFORMS
    Publication number: 20190007705
    Abstract: Techniques are described in which a decoder is configured to receive an input data block and apply an inverse non-separable transform to at least part of the input data block to generate an inverse non-separable transform output coefficient block. The applying the inverse non-separable transform comprises assigning a window, assigning a weight for each position inside the assigned window, and determining the inverse non-separable transform output coefficient block based on the assigned weights. The decoder is further configured to forming a decoded video block based on the determined inverse non-separable transform output coefficient block, wherein forming the decoded video block comprises summing the residual video block with one or more predictive blocks.
    Type: Application
    Filed: June 27, 2018
    Publication date: January 3, 2019
    Inventors: Xin ZHAO, Vadim SEREGIN, Amir SAID, Marta KARCZEWICZ
  • INTRA PREDICTION IN VIDEO CODING
    Publication number: 20190007688
    Abstract: An apparatus configured to encode or decode video data that includes a memory configured to store at least one reconstructed sample of video data and at least one processor, in communication with the memory, that is configured to identify at least one reconstructed sample, determine at least one extended angular intra prediction mode to use for intra prediction of at least one sample of a current block, intra predict, using the at least one extended angular intra prediction mode, at least one sample of the current block based on the at least one reconstructed sample, extended angular intra prediction modes including angular intra prediction modes other than angular prediction modes between horizontal ?45 degrees and vertical ?45 degrees, and encode or decode the current block based on the at least one predicted sample.
    Type: Application
    Filed: June 27, 2018
    Publication date: January 3, 2019
    Inventors: Kai ZHANG, Jianle CHEN, Xin ZHAO, Marta KARCZEWICZ
  • MODEL ORDER REDUCTION IN TRANSISTOR LEVEL TIMING
    Publication number: 20180373830
    Abstract: A method of performing transistor simulation with improved sensitivity to parasitic by model order reduction in transistor-level timing is disclosed. The method includes reducing a number of derivative calculations during transistor simulation by representing parasitics as a reduced-order model, wherein the reducing includes: compressing the parasitics to a reduced-order model; simulating with load which is replaced with the reduced-order model; differentiating results of the simulation with respect to reduced-order model parameters; differentiating parameters of the reduced-order model with respect to parasitic values; differentiating the parasitic values with respect to statistical parameters; and computing the differential results of the simulation with respect to the statistical parameters via chain ruling.
    Type: Application
    Filed: May 25, 2018
    Publication date: December 27, 2018
    Inventors: Robert J. ALLEN, Yanai DANAN, Vasant RAO, Jeffrey P. SOREFF, Xin ZHAO
  • Method for generating sub-nanosecond pulse laser
    Patent number: 10164401
    Abstract: A method is disclosed for generating a sub-nanosecond pulse laser, using a voltage-increased type electro-optical Q-switched laser. The method includes: applying a square wave driving signal on a Pockels cell in an electro-optical Q-switched laser by using a Q-switch driver module, where the peak voltage of the square wave driving signal is higher than the quarter-wave voltage of the Pockels cell; and performing, by controlling the loss related to the electro-optical Q switch with a voltage of the driving signal increasing from 0 to the peak voltage, a change of the working state of the electro-optical Q switch from a switched-off state to a switched-on state, and then to a partially-switched-on state. The intracavity laser is exhausted within a quite short time, so that the pulse width of the laser is shortened, to implement sub-nanosecond operation of a pulse laser.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: December 25, 2018
    Assignee: Shanxi University
    Inventors: Kuanshou Zhang, Xin Zhao, Yuanji Li, Jinxia Feng
  • INTRA FILTERING APPLIED TOGETHER WITH TRANSFORM PROCESSING IN VIDEO CODING
    Publication number: 20180367814
    Abstract: A method of decoding video data includes receiving a block of video data, determining an intra prediction mode for the block of video data, and determining whether or not to use a position-dependent prediction combination (PDPC) mode to decode the block of video data based at least on the determined intra prediction mode. The method may also include receiving a syntax element associated with a primary transform or a secondary transform used for a block of video data, determining a usage of one or more video coding tools based on a value of the syntax element, the one or more video coding tools being video coding techniques other than the primary transform or secondary transform, and applying the one or more coding tools to the block of video data based on the determined usage.
    Type: Application
    Filed: May 23, 2018
    Publication date: December 20, 2018
    Inventors: Vadim Seregin, Xin Zhao, Marta Karczewicz
  • Arithmetic coder with multiple window sizes
    Patent number: 10148961
    Abstract: An example method of entropy coding video data includes determining a window size of a plurality of window sizes for a context of a plurality of contexts used in a context-adaptive coding process to entropy code a value for a syntax element of the video data; entropy coding, based on a probability state of the context, a bin of the value for the syntax element; updating a probability state of the context based on the window size and the coded bin. The example method also includes entropy coding a next bin with the same context based on the updated probability state of the context.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: December 4, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Li Zhang, Jianle Chen, Xin Zhao, Xiang Li, Hongbin Liu, Ying Chen, Marta Karczewicz
  • Intra prediction and intra mode coding
    Patent number: 10142627
    Abstract: A device includes one or more processors configured to derive, from among a plurality of intra prediction modes, M most probable modes (MPMs) for intra prediction of a block of video data. A syntax element indicating whether a MPM index or a non-MPM index is used to indicate a selected intra prediction mode of the plurality of intra prediction modes for intra prediction of the block of video data is decoded. Based on the indicated one of the MPM index or the non-MPM index being the MPM index, the one or more processors select, for each of one or more context-modeled bins of the MPM index, based on intra prediction modes used to decode one or more neighboring blocks, a context index for the context-modeled bin. The one or more processors reconstruct the block of video data based on the selected intra prediction mode.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: November 27, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Xin Zhao, Jianle Chen, Li Zhang, Marta Karczewicz
  • INTRA REFERENCE FILTER FOR VIDEO CODING
    Publication number: 20180324417
    Abstract: A method of decoding video data that includes receiving a current block of video data encoded using an intra prediction mode, determining residual video data for the current block of video data, determining reference samples of the current block of video data, determining filter coefficients for a bilateral filter based on a distance between the reference samples and neighboring reference samples and based on a sample value difference between the reference samples and the neighboring reference samples, applying the bilateral filter with the determined filter coefficients to the determined reference samples to produce filtered reference samples, generating a prediction block using the filtered reference samples, and adding samples of the prediction block to the determined residual video data to produce a decoded block of video data.
    Type: Application
    Filed: May 2, 2018
    Publication date: November 8, 2018
    Inventors: Marta Karczewicz, Xin Zhao, Vadim Seregin, Amir Said
  • 3-D AIR POLLUTION TRANSMISSION PATH IDENTIFICATION
    Publication number: 20180313649
    Abstract: A method for tracking and identifying a polluted air mass's transmission trajectory in real 3-D space. In one aspect, a polluted air mass's transmission path identification is based on a monitoring of PM2.5 concentration in cubic volumes of an air mass. The method computes a transmission path of polluted air that considers wind-pressure conversion, the displacement estimation with mass concentration, and planetary boundary layer (PBLP height constraint) for 3-D cubic grids. The resultant determination of a polluted air mass's transmission trajectory in real 3-D space generates more practical and reliable results for intensive knowledge of the transport pathways and potential pollution sources in real 3-D space.
    Type: Application
    Filed: November 8, 2017
    Publication date: November 1, 2018
    Inventors: Xin Xin Bai, Xin Jie Lv, Xiao Guang Rui, Xi Xia, Jian Yao, Wen Jun Yin, Wei Zhao, Yu Xin Zhao
  • 3-D AIR POLLUTION TRANSMISSION PATH IDENTIFICATION
    Publication number: 20180313648
    Abstract: A system, method and computer program product for tracking and identifying a polluted air mass's transmission trajectory in real 3-D space. In one aspect, a polluted air mass's transmission path identification is based on a monitoring of PM2.5 concentration in cubic volumes of an air mass. The method computes a transmission path of polluted air that considers wind-pressure conversion, the displacement estimation with mass concentration, and planetary boundary layer (PBLP height constraint) for 3-D cubic grids. The resultant determination of a polluted air mass's transmission trajectory in real 3-D space generates more practical and reliable results for intensive knowledge of the transport pathways and potential pollution sources in real 3-D space.
    Type: Application
    Filed: April 28, 2017
    Publication date: November 1, 2018
    Inventors: Xin Xin Bai, Xin Jie Lv, Xiao Guang Rui, Xi Xia, Jian Yao, Wen Jun Yin, Wei Zhao, Yu Xin Zhao
  • AUTOMATIC SITING FOR AIR QUALITY MONITORING STATIONS
    Publication number: 20180306762
    Abstract: A system, a computer readable storage medium, and a method for automatically siting for air quality monitoring stations includes collecting from air quality monitoring stations air pollution concentration data, collecting from meteorological stations meteorological data, and interpolating, by the at least one or more processors, the air pollution concentration data to provide interpolated air pollution concentration data. The method and system can further cluster the interpolated air pollution concentration data and the meteorological data to provide clustered data and select a candidate site for an air monitoring station using the clustered data. The method and system can further evaluate a relationship of the air pollution concentration data with the meteorological data by weighting the air pollution data with the meteorological data.
    Type: Application
    Filed: April 24, 2017
    Publication date: October 25, 2018
    Inventors: Jin DONG, Xiao Guang RUI, Jian YAO, Wen Jun YIN, Chao ZHANG, Xin ZHANG, Yu Xin ZHAO
  • SWITCHING IN AN AUDIO SYSTEM WITH MULTIPLE PLAYBACK PATHS
    Publication number: 20180295442
    Abstract: In accordance with embodiments of the present disclosure, a system may include a playback path and a control circuit. The playback path may have a playback input for receiving an input signal and configured to generate at a playback path output an output signal based on the input signal, wherein the playback path is configured to operate in a plurality of operational modes. The control circuit may be configured to receive a first signal from within the playback path and indicative of the input signal, receive a second signal generated from the input signal externally to the playback path, and select a selected operational mode from the plurality of operational modes based on the first signal and the second signal.
    Type: Application
    Filed: April 7, 2017
    Publication date: October 11, 2018
    Applicant: Cirrus Logic International Semiconductor Ltd.
    Inventors: Tejasvi DAS, Xin ZHAO, Ku HE, Xiaofan FEI
  • Construction layout for caverns of underground nuclear power plant
    Patent number: 10094217
    Abstract: A construction layout for caverns of an underground nuclear power plant, including: two primary caverns accommodating nuclear reactor powerhouses, combined caverns, electric powerhouse caverns, pressure relief caverns, a first primary traffic tunnel, a second primary traffic tunnel, a third primary traffic tunnel, a top adit system, and a ground adit system. Each combined cavern is disposed on one side of each of the two primary caverns. Each electric powerhouse cavern and each pressure relief cavern are disposed on two sides of each of the two primary caverns perpendicular to the longitudinal direction of the mountain. Each electric powerhouse cavern is perpendicular to the longitudinal direction of the mountain. The first primary traffic tunnel and the third primary traffic tunnel are disposed along the longitudinal direction of the mountain on outer sides of the two combined caverns, respectively.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: October 9, 2018
    Assignee: CHANGJIANG SURVEY PLANNING DESIGN AND RESEARCH CO., LTD.
    Inventors: Qigui Yang, Xinqiang Niu, Lijun Su, Baixing Liu, Lixin Liu, Xin Zhao, Xuehong Yang, Feng Li, Xia Hua, Xuexian Zhu, Qianlong Han, Xiao Pan, Haibo Liu
  • MOTION VECTOR DIFFERENCE (MVD) PREDICTION
    Publication number: 20180278951
    Abstract: Techniques are described to increase the coding efficiency of information indicating a sign of a motion vector difference (MVD) component. A video coder may determine a MVD component sign predictor, and determine whether the MVD component sign predictor is the MVD component sign based on an indicator that is transmitted or received. In some examples, the indicator may be context coded, which promotes coding efficiencies.
    Type: Application
    Filed: March 22, 2018
    Publication date: September 27, 2018
    Inventors: Vadim Seregin, Yu-Chen Sun, Yi-Wen Chen, Wei-Jung Chien, Xin Zhao, Rajan Laxman Joshi, Marta Karczewicz
  • Adaptive mode checking order for video encoding
    Patent number: 10085027
    Abstract: A video encoding device comprises a memory configured and at least one processor configured to: determine whether a metric meets a condition based on statistics, wherein the statistics are associated with a first video encoding mode checking order and a second video encoding mode checking order, responsive to determining that the metric meets the condition, select a first encoding mode checking order to encode the first block of video data responsive to determining that the condition is not met, select a second encoding mode checking order different from the first encoding mode checking order to encode the first block of video data, update the statistics based on the selected first or second encoding mode checking order, and encode a second block of video data, based on the updated statistics, and using the first or second mode checking order.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: September 25, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Chengjie Tu, Wei-Jung Chien, Xianglin Wang, Jaehong Chon, In Suk Chong, Marta Karczewicz, Woo-Shik Kim, Xin Zhao
  • Method and apparatus for recognizing RGB-D objects based on adaptive similarity measure of dense matching item
    Publication number: 20180268251
    Abstract: The application discloses a method and an apparatus for recognizing RGB-D objects based on adaptive similarity measure of dense matching item, wherein the method can include at least the following steps: convolution neural network features of a to-be-queried object and a reference object are extracted; dense matching is carried out on the reference object and the to-be-queried object on the basis of the convolution neural network features fused with RGB and depth information; similarity between the reference object and the to-be-queried object is measured according to a dense matching result; and the to-be-queried object is classified based on the similarity between the reference object and the to-be-queried object. With the embodiments of the present application, at least in part, the technical problem of how to improve the robustness of object recognition is solved.
    Type: Application
    Filed: November 25, 2015
    Publication date: September 20, 2018
    Inventors: Kaiqi Huang, Xin Zhao, Yanhua Cheng
  • INTRA FILTERING FLAG IN VIDEO CODING
    Publication number: 20180262763
    Abstract: A method of decoding video data including, receiving a first block of video data, receiving a first syntax element indicating if a coding mode is to be used for the first block of video data in the case that the first block of video data is associated with a number of non-zero transform coefficients greater than or equal to a threshold, explicitly decoding a value of the received first syntax element, and applying the coding mode to the first block of video data in accordance with a value of the first syntax element.
    Type: Application
    Filed: March 7, 2018
    Publication date: September 13, 2018
    Inventors: Vadim Seregin, Marta Karczewicz, Xin Zhao
  • Filter unit
    Patent number: D827771
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: September 4, 2018
    Assignee: GUANGZHOU SMARTDO TRADING CO., LTD
    Inventor: Xin Zhao
  • Electronic cockroach repeller
    Patent number: D831781
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: October 23, 2018
    Assignee: Guangzhou Smartdo E-commerce Technology Co., Ltd.
    Inventor: Xin Zhao