Patents by Inventor Lingzhi Liu

Lingzhi Liu 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: 11190809
    Abstract: An apparatus including a memory operably coupled to a processor. The processor is configured to determine whether to use an intra smoothing filter for a rectangular prediction unit (PU), wherein a width of the rectangular PU is different from a height of the rectangular PU.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: November 30, 2021
    Assignee: Futurewei Technologies, Inc.
    Inventors: Guichun Li, Lingzhi Liu, Changcai Lai, Nam Ling, Jianhua Zheng, Chen-Xiong Zhang
  • Patent number: 10972767
    Abstract: A transmitter for handling multiple formats of a video sequence, comprises a preprocessing module, for receiving a first format of a video sequence, to generate metadata of a second format of the video sequence according to the first format of the video sequence and the second format of the video sequence; and an encoder, couple to the preprocessing module, for transmitting the first format of the video sequence and the metadata in a bit stream to a receiver.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: April 6, 2021
    Assignee: Realtek Semiconductor Corp.
    Inventors: Lingzhi Liu, Li Liu, Jing Wang, Wujun Chen, Qingxi He, Wei Pu, Weimin Zeng, Chi-Wang Chai
  • Publication number: 20210067777
    Abstract: An encoding method with multiple image block division manners is disclosed, including: determining a division manner and a division direction of an image block; dividing the image block to obtain image subblocks sequentially arranged horizontally or vertically; determining whether the image subblocks need subdivision, and if subdivision is not needed, predicting the encoding object in the frame according to the image subblocks, to obtain residual data; performing transformation, quantization, and entropy encoding for the residual data so as to obtain coded residual data; and writing the division manner of the image block, the division direction of the image block, an identifier indicating whether the image subblocks need subdivision, and the coded residual data into a bitstream. By applying the encoding method, better prediction accuracy can be achieved when the image block presents a small change of pixel value in the horizontal or vertical direction.
    Type: Application
    Filed: November 10, 2020
    Publication date: March 4, 2021
    Inventors: Changcai LAI, Xiaoran CAO, Yongbing LIN, Lingzhi LIU, Yun HE
  • Patent number: 10869035
    Abstract: An encoding method with multiple image block division manners is disclosed, including: determining a division manner and a division direction of an image block; dividing the image block to obtain image subblocks sequentially arranged horizontally or vertically; determining whether the image subblocks need subdivision, and if subdivision is not needed, predicting the encoding object in the frame according to the image subblocks, to obtain residual data; performing transformation, quantization, and entropy encoding for the residual data so as to obtain coded residual data; and writing the division manner of the image block, the division direction of the image block, an identifier indicating whether the image subblocks need subdivision, and the coded residual data into a bitstream. By applying the encoding method, better prediction accuracy can be achieved when the image block presents a small change of pixel value in the horizontal or vertical direction.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: December 15, 2020
    Assignees: Tsinghua University, Huawei Technologies Co., Ltd.
    Inventors: Changcai Lai, Xiaoran Cao, Yongbing Lin, Lingzhi Liu, Yun He
  • Publication number: 20200204830
    Abstract: An apparatus including a memory operably coupled to a processor. The processor is configured to determine whether to use an intra smoothing filter for a rectangular prediction unit (PU), wherein a width of the rectangular PU is different from a height of the rectangular PU.
    Type: Application
    Filed: March 2, 2020
    Publication date: June 25, 2020
    Inventors: Guichun Li, Lingzhi Liu, Changcai Lai, Nam Ling, Jianhua Zheng, Chen-Xiong Zhang
  • Patent number: 10645422
    Abstract: An apparatus including a memory operably coupled to a processor. The processor is configured to select an intra smoothing filter for a rectangular prediction unit (PU) based on a lookup table (LUT) used for square PUs, wherein a width of the rectangular PU is different from a height of the rectangular PU.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: May 5, 2020
    Assignee: Futurewei Technologies, Inc.
    Inventors: Guichun Li, Lingzhi Liu, Changcai Lai, Nam Ling, Jianhua Zheng, Chen-Xiong Zhang
  • Publication number: 20190132617
    Abstract: A transmitter for handling multiple formats of a video sequence, comprises a preprocessing module, for receiving a first format of a video sequence, to generate metadata of a second format of the video sequence according to the first format of the video sequence and the second format of the video sequence; and an encoder, couple to the preprocessing module, for transmitting the first format of the video sequence and the metadata in a bit stream to a receiver.
    Type: Application
    Filed: October 29, 2018
    Publication date: May 2, 2019
    Inventors: Lingzhi Liu, Li Liu, Jing Wang, Wujun Chen, Qingxi He, Wei Pu, Weimin Zeng, Chi-Wang Chai
  • Publication number: 20180295386
    Abstract: An apparatus including a memory operably coupled to a processor. The processor is configured to select an intra smoothing filter for a rectangular prediction unit (PU) based on a lookup table (LUT) used for square PUs, wherein a width of the rectangular PU is different from a height of the rectangular PU.
    Type: Application
    Filed: June 7, 2018
    Publication date: October 11, 2018
    Inventors: Guichun Li, Lingzhi Liu, Changcai Lai, Nam Ling, Jianhua Zheng, Chen-Xiong Zhang
  • Patent number: 10015522
    Abstract: An apparatus including a memory operably coupled to a processor. The processor is configured to determine whether to use an intra smoothing filter for a rectangular prediction unit (PU) based on a lookup table (LUT) used for square PUs, wherein a width of the rectangular PU is not equal to a height of the rectangular PU.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: July 3, 2018
    Assignee: Futurewei Technologies, Inc.
    Inventors: Guichun Li, Lingzhi Liu, Changcai Lai, Nam Ling, Jianhua Zheng, Chen-Xiong Zhang
  • Patent number: 9945399
    Abstract: The present invention discloses a liquid-driven nano-porous actuator and the application thereof, and belongs to the field of nano material actuators. According to the present invention, by changing the content of the liquid in the nano-porous material, the interface between the surface liquid of the nano-porous material and air is exchanged between flat and curved states, so as to change the compressive stress acting on the nano-porous material from the surface tension of the liquid and change the elastic deformation of the nano-porous material, thus driving the nano-porous material to contract and expand in a reversible manner and further realizing driving performance.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: April 17, 2018
    Assignee: INSTITUTE OF METAL RESEARCH, CHINESE ACADEMY OF SCIENCES
    Inventors: Xinglong Ye, Lingzhi Liu, Haijun Jin
  • Patent number: 9807385
    Abstract: An apparatus comprising a processor configured to determine whether to apply an intra smoothing filter for a prediction unit (PU) based on a lookup table (LUT), wherein the LUT comprises data indicating the intra smoothing filter should not be applied for any PU with a block size of 8×8 pixels and associated with directional prediction mode. The disclosure also includes a method comprising generating reference samples, determining a size of a PU block, and selecting the reference samples based on PU block size, wherein filtered reference samples are not selected for PU blocks with a size of 8×8 pixels and associated with directional prediction mode.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: October 31, 2017
    Assignees: Futurewei Technologies, Inc., Santa Clara University
    Inventors: Guichun Li, Lingzhi Liu, Nam Ling, Jianhua Zheng, Chen-Xiong Zhang, Li Song
  • Publication number: 20170155925
    Abstract: An apparatus including a memory operably coupled to a processor. The processor is configured to determine whether to use an intra smoothing filter for a rectangular prediction unit (PU) based on a lookup table (LUT) used for square PUs, wherein a width of the rectangular PU is not equal to a height of the rectangular PU.
    Type: Application
    Filed: February 14, 2017
    Publication date: June 1, 2017
    Inventors: Guichen Li, Lingzhi Liu, Changcai Lai, Nam Ling, Jianhua Zheng, Chen-Xiong Zhang
  • Patent number: 9667987
    Abstract: An apparatus comprising a codec configured to predict an intra mode for a considered pixel block based on a plurality of coded intra modes for a plurality of adjacent pixel blocks to the considered pixel block, wherein the predicted intra mode and the coded intra modes correspond to a set of intra-frame modes that comprise a plurality of directional intra modes and at least two non-directional intra modes and that are assigned a plurality of corresponding group numbers and group index numbers, and wherein the intra mode is predicted based on the group numbers and group index numbers of the coded intra modes.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: May 30, 2017
    Assignee: Futurewei Technologies, Inc.
    Inventors: Lingzhi Liu, Guichun Li, Nam Ling, Jianhua Zheng, Chenxiong Zhang
  • Patent number: 9602839
    Abstract: An apparatus comprising a processor configured to determine whether to use an intra smoothing filter for a rectangular prediction unit (PU) based on a lookup table (LUT) used for square PUs, wherein a width of the rectangular PU is not equal to a height of the rectangular PU.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: March 21, 2017
    Assignee: Futurewei Technologies, Inc.
    Inventors: Guichun Li, Lingzhi Liu, Changcai Lai, Nam Ling, Jianhua Zheng, Chen-Xiong Zhang
  • Patent number: 9438904
    Abstract: A video codec comprising a processor configured to generate a prediction block for a chroma block, wherein the prediction block comprises a plurality of predicted chroma samples, wherein each of the plurality of predicted chroma samples is based on a first plurality of reconstructed luma samples located in a corresponding reconstructed luma block, a second plurality of reconstructed luma samples located in neighboring blocks of the corresponding reconstructed luma block, and a look-up table, wherein an index of the look-up table is based on the second plurality of reconstructed luma samples, wherein an index of the look-up table has less than 63 values.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: September 6, 2016
    Assignee: Futurewei Technologies, Inc.
    Inventor: Lingzhi Liu
  • Patent number: 9438905
    Abstract: A video codec able to generate a predicted chroma sample for a chroma block based on reconstructed luma samples and reconstructed chroma samples. The reconstructed luma samples are located in neighboring blocks of a corresponding reconstructed luma block and adjacent to the corresponding reconstructed luma block. The reconstructed chroma samples are located in neighboring blocks of the chroma block and adjacent to the chroma block. The predicted chroma sample is generated by computing multipliers. Each of the multipliers has a bit width no greater than an input bit depth of the chroma block. The predicted chroma sample is generated without the need for any multiplier having a bit width greater than the input bit depth of the chroma block.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: September 6, 2016
    Assignee: Futurewei Technologies, Inc.
    Inventor: Lingzhi Liu
  • Publication number: 20160173907
    Abstract: A video codec including a processor configured to generate a predicted chroma sample for a chroma block based on reconstructed luma samples located in neighboring blocks of a corresponding reconstructed luma block and adjacent to the corresponding reconstructed luma block, and reconstructed chroma samples located in neighboring blocks of the chroma block and adjacent to the chroma block. Generating the predicted chroma sample includes computing a plurality of multipliers. Each of the plurality of multipliers has a bit width no greater than an input bit depth of the chroma block. Generating the predicted chroma sample does not require any multiplier that has a bit width greater than the input bit depth of the chroma block. A range of input parameters used to compute at least one of the multipliers is restrained by using the input bit depth as an exponent.
    Type: Application
    Filed: February 23, 2016
    Publication date: June 16, 2016
    Inventor: Lingzhi Liu
  • Patent number: 9344715
    Abstract: A method of intra prediction comprising computing a prediction block for a luma block, wherein computing the prediction block includes using a plurality of directional intra prediction modes and an angular table (angTable) comprising a plurality of entries, and wherein a value of each entry is determined via a mathematical derivation. An apparatus comprising a memory configured to store an angTable comprising a plurality of entries, wherein a value of each entry is determined via a mathematical derivation, and a processor configured to compute a prediction block for a luma block using a plurality of directional intra prediction modes and the angTable.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: May 17, 2016
    Assignee: Futurewei Technologies, Inc.
    Inventor: Lingzhi Liu
  • Patent number: 9307237
    Abstract: A video codec comprising a processor configured to generate a prediction block for a chroma block, wherein the prediction block comprises a predicted chroma sample, wherein the predicted chroma sample is based on a filtered reconstructed luma sample located in a corresponding reconstructed luma block, a plurality of downsampled filtered reconstructed luma samples located in positions neighboring the corresponding reconstructed luma block, and a plurality of downsampled chroma samples located in positions neighboring the chroma block.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: April 5, 2016
    Assignees: Futurewei Technologies, Inc., Santa Clara University
    Inventors: Lingzhi Liu, Guichun Li, Nam Ling, Jianhua Zheng, Philipp Zhang, Li Song
  • Patent number: 9225984
    Abstract: A video codec comprising a processor computing an average of a plurality of reconstructed chroma samples located in neighboring blocks of a chroma block and adjacent to the chroma block, computing an intermediate variable by applying an integer function on the average of the reconstructed chroma samples, and generating a predicted chroma sample for the chroma block based on the intermediate variable.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: December 29, 2015
    Assignee: Futurewei Technologies, Inc.
    Inventor: Lingzhi Liu