Patents by Inventor Yoo Jin Choi

Yoo Jin Choi 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: 10355792
    Abstract: A system and method for removing bias from a frequency estimate. A simulation is used to predict, for various values of the signal to noise ratio, a bias in a raw frequency estimate produced by a frequency estimation algorithm. A straight line is fit to simulated frequency offset estimates as a function of true frequency offset, and the reciprocal of the slope of the line is stored, as a multiplicative bias removal term, in a lookup table, for the simulated signal to noise ratio. In operation, the raw frequency estimate is multiplied by a multiplicative bias removal term, obtained from the lookup table, to form a corrected frequency offset estimate.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: July 16, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yoo Jin Choi, Dongwoon Bai, Linbo Li, Farrokh Etezadi, Jungwon Lee
  • Publication number: 20190138882
    Abstract: A method is provided. The method includes selecting a neural network model, wherein the neural network model includes a plurality of layers, and wherein each of the plurality of layers includes weights and activations; modifying the neural network model by inserting a plurality of quantization layers within the neural network model; associating a cost function with the modified neural network model, wherein the cost function includes a first coefficient corresponding to a first regularization term, and wherein an initial value of the first coefficient is pre-defined; and training the modified neural network model to generate quantized weights for a layer by increasing the first coefficient until all weights are quantized and the first coefficient satisfies a pre-defined threshold, further including optimizing a weight scaling factor for the quantized weights and an activation scaling factor for quantized activations, and wherein the quantized weights are quantized using the optimized weight scaling factor.
    Type: Application
    Filed: March 7, 2018
    Publication date: May 9, 2019
    Inventors: Yoo Jin CHOI, Mostafa El-Khamy, Jungwon Lee
  • Patent number: 10182439
    Abstract: An apparatus and a method. The apparatus includes a channel estimation (CE) module, including a first input for receiving pilot resource element (RE) observations, a second input for receiving data RE observations, a third input for receiving log-likelihood ratios (LLRs), and an output; a detector, including a first input connected to the output of the CE module, a second input for receiving data RE observations, and an output connected to the third input of the CE module; and a decoder, including an input connected to the third input of the CE module, and an output.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: January 15, 2019
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Yoo Jin Choi, Dongwoon Bai, Sungsoo Kim, Jungwon Lee
  • Patent number: 10133365
    Abstract: A method of displaying an image is provided, the method including displaying an item for providing content or information regarding the content and a pointed location corresponding to a received input; determining a distance from the pointed location to the item; determining an amount or a type of information corresponding to the item to display, based on the determined distance; and displaying information corresponding to the item, based on the determined amount or type of information.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: November 20, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hye-ryung Kim, Yoo-jin Choi
  • Publication number: 20180323929
    Abstract: A system and method for characterizing an interference demodulation reference signal (DMRS) in a piece of user equipment (UE), e.g., a mobile device. The UE determines whether the serving signal is transmitted in a DMRS-based transmission mode; if it is, the UE cancels the serving DMRS from the received signal; otherwise the UE cancels the serving data signal from the received signal. The remaining signal is then analyzed for the amount of power it has in each of four interference DMRS candidates, and hypothesis testing is performed to determine whether interference DMRS is present in the signal, and, if so, to determine the rank of the interference DMRS, and the port and scrambling identity of each of the interference DMRS layers.
    Type: Application
    Filed: July 9, 2018
    Publication date: November 8, 2018
    Inventors: Yoo Jin Choi, Dongwoon Bai, Jungwon Lee, Sungyoon Cho, Heunchul Lee, Sungsoo Kim
  • Publication number: 20180300624
    Abstract: Disclosed herein is convolutional neural network (CNN) system for generating a classification for an input image. According to an embodiment, the CNN system comprises a sequence of neural network layers configured to: derive a feature map based on at least the input image; puncture at least one selection among the feature map and a kernel by setting the value of one or more elements of a row of the at least one selection to zero according to a pattern and cyclic shifting the pattern by a predetermined interval per row to set the value of one or more elements of the rest of the rows of the at least one selection according to the cyclic shifted pattern; convolve the feature map with the kernel to generate a first convolved output; and generate the classification for the input image based on at least the first convolved output.
    Type: Application
    Filed: June 27, 2017
    Publication date: October 18, 2018
    Inventors: Mostafa El-Khamy, Yoo Jin Choi, Jungwon Lee
  • Patent number: 10038532
    Abstract: A system and method for characterizing an interference demodulation reference signal (DMRS) in a piece of user equipment (UE), e.g., a mobile device. The UE determines whether the serving signal is transmitted in a DMRS-based transmission mode; if it is, the UE cancels the serving DMRS from the received signal; otherwise the UE cancels the serving data signal from the received signal. The remaining signal is then analyzed for the amount of power it has in each of four interference DMRS candidates, and hypothesis testing is performed to determine whether interference DMRS is present in the signal, and, if so, to determine the rank of the interference DMRS, and the port and scrambling identity of each of the interference DMRS layers.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: July 31, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yoo Jin Choi, Dongwoon Bai, Jungwon Lee, Sungyoon Cho, Heunchul Lee, Sungsoo Kim
  • Publication number: 20180205514
    Abstract: A system and method for characterizing an interference demodulation reference signal (DMRS) in a piece of user equipment (UE), e.g., a mobile device. The UE determines whether the serving signal is transmitted in a DMRS-based transmission mode; if it is, the UE cancels the serving DMRS from the received signal; otherwise the UE cancels the serving data signal from the received signal. The remaining signal is then analyzed for the amount of power it has in each of four interference DMRS candidates, and hypothesis testing is performed to determine whether interference DMRS is present in the signal, and, if so, to determine the rank of the interference DMRS, and the port and scrambling identity of each of the interference DMRS layers.
    Type: Application
    Filed: March 17, 2017
    Publication date: July 19, 2018
    Inventors: Yoo Jin Choi, Dongwoon Bai, Jungwon Lee, Sungyoon Cho, Heunchul Lee, Sungsoo Kim
  • Publication number: 20180205470
    Abstract: A system and method for removing bias from a frequency estimate. A simulation is used to predict, for various values of the signal to noise ratio, a bias in a raw frequency estimate produced by a frequency estimation algorithm. A straight line is fit to simulated frequency offset estimates as a function of true frequency offset, and the reciprocal of the slope of the line is stored, as a multiplicative bias removal term, in a lookup table, for the simulated signal to noise ratio. In operation, the raw frequency estimate is multiplied by a multiplicative bias removal term, obtained from the lookup table, to form a corrected frequency offset estimate.
    Type: Application
    Filed: March 17, 2017
    Publication date: July 19, 2018
    Inventors: Yoo Jin Choi, Dongwoon Bai, Linbo Li, Farrokh Etezadi, Jungwon Lee
  • Publication number: 20180107926
    Abstract: Apparatuses and methods of manufacturing same, systems, and methods for performing network parameter quantization in deep neural networks are described. In one aspect, multi-dimensional vectors representing network parameters are constructed from a trained neural network model. The multi-dimensional vectors are quantized to obtain shared quantized vectors as cluster centers, which are fine-tuned. The fine-tuned and shared quantized vectors/cluster centers are then encoded. Decoding reverses the process.
    Type: Application
    Filed: September 6, 2017
    Publication date: April 19, 2018
    Inventors: Yoo Jin CHOI, Mostafa El-Khamy, Jungwon LEE
  • Publication number: 20180107925
    Abstract: Apparatuses and methods of manufacturing same, systems, and methods for performing network parameter quantization in deep neural networks are described. In one aspect, diagonals of a second-order partial derivative matrix (a Hessian matrix) of a loss function of network parameters of a neural network are determined and then used to weight (Hessian-weighting) the network parameters as part of quantizing the network parameters. In another aspect, the neural network is trained using first and second moment estimates of gradients of the network parameters and then the second moment estimates are used to weight the network parameters as part of quantizing the network parameters. In yet another aspect, network parameter quantization is performed by using an entropy-constrained scalar quantization (ECSQ) iterative algorithm. In yet another aspect, network parameter quantization is performed by quantizing the network parameters of all layers of a deep neural network together at once.
    Type: Application
    Filed: February 15, 2017
    Publication date: April 19, 2018
    Inventors: Yoo Jin CHOI, Mostafa EL-KHAMY, Jungwon LEE
  • Patent number: 9900447
    Abstract: A method of obtaining identification information, and based on the obtained identification, wirelessly transmitting content between apparatuses, and a content transmission apparatus are provided. The method obtains the identification information on a content reception apparatus or a content backup apparatus by using an affordance function of a content transmission apparatus or a content providing apparatus. The method and the content transmission apparatus include obtaining identification information on a second apparatus by using a first apparatus; outputting confirmation information on the second apparatus from the first apparatus, based on the obtained identification information on the second apparatus; and wirelessly transmitting the content from the first apparatus to the second apparatus, so as to enable the content to be conveniently transmitted between the apparatuses and to provide easy accessibility to a content reception apparatus.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: February 20, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Young-sun Kim, Hyun-cheol Park, Chang-seog Ko, Yoo-jin Choi
  • Publication number: 20170262072
    Abstract: A method of displaying an image is provided, the method including displaying an item for providing content or information regarding the content and a pointed location corresponding to a received input; determining a distance from the pointed location to the item; determining an amount or a type of information corresponding to the item to display, based on the determined distance; and displaying information corresponding to the item, based on the determined amount or type of information.
    Type: Application
    Filed: December 12, 2016
    Publication date: September 14, 2017
    Inventors: Hye-ryung KIM, Yoo-jin CHOI
  • Publication number: 20170238317
    Abstract: An apparatus and a method. The apparatus includes a channel estimation (CE) module, including a first input for receiving pilot resource element (RE) observations, a second input for receiving data RE observations, a third input for receiving log-likelihood ratios (LLRs), and an output; a detector, including a first input connected to the output of the CE module, a second input for receiving data RE observations, and an output connected to the third input of the CE module; and a decoder, including an input connected to the third input of the CE module, and an output.
    Type: Application
    Filed: April 18, 2016
    Publication date: August 17, 2017
    Inventors: Yoo Jin CHOI, Dongwoon Bai, Sungsoo Kim, Jungwon Lee
  • Patent number: 9612706
    Abstract: Provided are a method and apparatus for displaying contents-related items. The method includes using a correlation between a first attribute and a second attribute to determine values of the second attribute, wherein the first attribute is one of a plurality of attributes of the contents-related items, the second attribute is one of a plurality of attributes of a plurality of blocks which is a part or a region of a screen, and each one of the plurality of blocks corresponds to each one contents-related item; and displaying the one or more contents-related items by displaying each corresponding block having the determined value of the second attribute on the screen, wherein the first attribute and the second attribute can be quantitatively represented.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: April 4, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ji-bum Moon, Jung-won Lee, Yoo-jin Choi, Min-jung Park, Woo-yong Chang, Chang-seog Ko
  • Patent number: 9596102
    Abstract: A computing system includes: an inter-device interface configured to receive receiver signal for communicating serving content through a communication channel; a communication unit, coupled to the inter-device interface, configured to: calculate a weighting set corresponding to a modular estimation mechanism, and generate a channel estimate based on the weighting set for characterizing the communication channel for recovering the serving content.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: March 14, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yoo Jin Choi, Jung Hyun Bae, Jungwon Lee, Inyup Kang
  • Publication number: 20160343345
    Abstract: A display system, a display apparatus, a remote control apparatus, and a method for controlling the same are provided. The display system according to the exemplary embodiment: a display apparatus; and a remote control apparatus sensing a motion and transmitting the sensed motion information to the display apparatus. The display apparatus displays a UI element when receiving motion information of the remote control apparatus and displays image contents when receiving a power on command from the remote control apparatus while the UI element is displayed.
    Type: Application
    Filed: May 20, 2016
    Publication date: November 24, 2016
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joo-sun MOON, Chun RYU, Ji-eun BYUN, Young-ah LEE, Yoo-jin CHOI, Do-young KIM, Min-ho CHOI, Hyun-seok CHOI, Cheul-hee HAHM, Woo-seok HWANG, Sung-hyun JANG
  • Patent number: D772280
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: November 22, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jang-Won Seo, Yoo-Jin Choi, Woo-Seok Hwang, Jin-Ha Lee, Sang-Joon Lee, Ji-Hong Kim, Se-Ran Jeon
  • Patent number: D775173
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: December 27, 2016
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sun-Young Kim, Yoo-Jin Choi, Woo-Seok Hwang, Jang-Won Seo
  • Patent number: D781877
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: March 21, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hee-Jin Ko, Yoo-Jin Choi, Chang-Hoon Park, Jae Julien