Patents by Inventor Dong Joon Choi

Dong Joon 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: 11024926
    Abstract: A leadtab assembly may include an electrode non-coating portion having a plurality of stacked electrodes collected inside a battery cell, a leadtab for forming an electrical path to the outside of the battery cell, and a bonding portion for mutually bonding the electrode non-coating portion and the leadtab, wherein a cutting prevention portion is elastically deformed by the force applied to the electrode non-coating portion as the electrode is expanded at the bonding point located between the bonding portion and the leadtab.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: June 1, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Sang-Joon Lee, Dong-Hui Kim, Sung-Min Choi, Kyo-Min Shin, Sung-Hoon Lim, Seung-Ho Ahn
  • Publication number: 20210151686
    Abstract: A compound of Chemical Formula 1, and an organic photoelectric device, an image sensor, and an electronic device including the same are disclosed: In Chemical Formula 1, each substituent is the same as described in the detailed description.
    Type: Application
    Filed: January 29, 2021
    Publication date: May 20, 2021
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Norihito ISHII, Katsunori SHIBATA, Takkyun RO, Ohkyu KWON, Sang Mo KIM, Kyung Bae PARK, Sung Young YUN, Dong-Seok LEEM, Youn Hee LIM, Yong Wan JIN, Yeong Suk CHOI, Jong Won CHOI, Taejin CHOI, Hyesung CHOI, Chul Joon HEO
  • Patent number: 10991069
    Abstract: There are provided an image processing apparatus for registering medical images having different modalities and a method for controlling the same. A reference location is designated in advance, a pre-designated cross-sectional image of an object is used, a corresponding location is extracted, and then image registration is performed. The image processing apparatus according to an exemplary embodiment includes a communication unit configured to receive a first medical image and a second medical image having a different modality from the first medical image of an object from a first medical apparatus and a second medical apparatus, respectively; and an image processing unit configured to extract a pre-designated cross-sectional image from the second medical image, extract a location corresponding to a reference location of the object from the extracted cross-sectional image, and perform registration of the second medical image and the first medical image corresponding to the extracted cross-sectional image.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: April 27, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jiwon Ryu, Won-Chul Bang, YoungTaek Oh, Kyong Joon Lee, Min Woo Lee, Jungwoo Chang, Jayeon Jeong, Dong Kuk Shin, Sung-Jin Choi
  • Publication number: 20210110238
    Abstract: Disclosed herein are an apparatus and method for detecting a broadcast signal. The apparatus includes a bootstrap detection unit for detecting whether a bootstrap signal is included in a received broadcast signal based on a preset first bootstrap window and a machine-learning method, a bootstrap offset estimation unit for searching the broadcast signal for the start point of the bootstrap signal using a preset second bootstrap window, estimating a bootstrap offset based on the machine-learning method, and estimating bootstrap symbols from the bootstrap offset, and a demodulation unit for demodulating information included in the broadcast signal from the bootstrap symbols based on the machine-learning method.
    Type: Application
    Filed: May 8, 2020
    Publication date: April 15, 2021
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Myung-Sun BAEK, Jin-Hyuk SONG, Byung-Jun BAE, Dong-Joon CHOI
  • Patent number: 10892924
    Abstract: Disclosed herein is a demodulation method of a Layer-Division Multiplexing (LDM) system. The demodulation method may include receiving an LDM modulation signal, restoring a first-layer signal from the LDM modulation signal and remodulating the first-layer signal, restoring and remodulating a second-layer signal by performing cancellation of the amplitude component of the first-layer signal from the LDM modulation signal using signaling information independently of restoration and remodulation of the first-layer signal, and restoring a third-layer signal using the first-layer signal, the second-layer signal, and the LDM modulation signal.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: January 12, 2021
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jae-Hwui Bae, Sun-Hyoung Kwon, Young-Su Kim, Dong-Joon Choi, Nam-Ho Hur
  • Publication number: 20200396110
    Abstract: Disclosed herein is a demodulation method of a Layer-Division Multiplexing (LDM) system. The demodulation method may include receiving an LDM modulation signal, restoring a first-layer signal from the LDM modulation signal and remodulating the first-layer signal, restoring and remodulating a second-layer signal by performing cancellation of the amplitude component of the first-layer signal from the LDM modulation signal using signaling information independently of restoration and remodulation of the first-layer signal, and restoring a third-layer signal using the first-layer signal, the second-layer signal, and the LDM modulation signal.
    Type: Application
    Filed: February 21, 2020
    Publication date: December 17, 2020
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jae-Hwui BAE, Sun-Hyoung KWON, Young-Su KIM, Dong-Joon CHOI, Nam-Ho HUR
  • Publication number: 20200344587
    Abstract: Disclosed herein is a method of operating an apparatus for providing a cell broadcast service. The operating method includes receiving, by a transmission device of a broadcaster, a cell broadcast service signal containing an emergency alert from a mobile carrier; converting, by the transmission device, the cell broadcast service signal into a public warning broadcast signal; and transmitting, by the transmission device, the public warning broadcast signal to a mobile switching center or a base station.
    Type: Application
    Filed: March 10, 2020
    Publication date: October 29, 2020
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Suk-Hee CHO, Byung-Jun BAE, Woong-Soo NA, Na-Yeon KIM, Dong-Joon CHOI
  • Patent number: 10700895
    Abstract: Disclosed are a roll-off period detection method, a symbol starting point detection method, a fractional frequency offset estimating method, and an OFDM downstream system using the same. A method of detecting a roll-off period in an OFDM downstream system according to an embodiment of the present disclosure may include: generating a temporary roll-off period by applying a windowing function to a signal having a preset length; and detecting a roll-off period based on any one of a cross correlation and a sum of differences between a detection target signal included in a range of two OFDM symbol signals based on a detection starting point, and the temporary roll-off period.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: June 30, 2020
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jae Hwui Bae, Jin Hyuk Song, Je Won Lee, Joon Young Jung, Dong Joon Choi, Nam Ho Hur
  • Patent number: 10645461
    Abstract: Disclosed herein are a method for providing an ad-hoc broadcast service based on channel sharing and an apparatus for the same. The method is configured such that a master broadcast transmitter for providing an ad-hoc broadcast service receives a request to share a channel from a new broadcast transmitter, allocates one of multiple subframes, into which the transmission frame of any one broadcast channel corresponding to the ad-hoc broadcast service is divided, to the new broadcast transmitter, and controls the new broadcast transmitter in real time by performing synchronization with the new broadcast transmitter based on reference time information included in a control Physical Layer Pipe (PLP).
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: May 5, 2020
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Dong-Joon Choi, Heung-Mook Kim, Sung-Ik Park, Joon-Young Jung, Yong-Seong Cho
  • Publication number: 20200059306
    Abstract: Disclosed herein are a signal-multiplexing apparatus and method based on machine learning. The signal-multiplexing method based on machine learning, performed by a signal-multiplexing apparatus based on machine learning, including training a transmitted signal using a machine-learning technique, performing complex mapping to transmit the transmitted signal as multiple signals, receiving the multiple signals and regularizing the multiple signals based on a preset rule corresponding to the machine-learning technique, outputting an estimated value for the transmitted signal by training regularized multiple signals using the machine-learning technique, calculating a difference between the transmitted signal and the estimated value for the transmitted signal, and detecting the transmitted signal from an output value when the difference is less than or equal to a preset value.
    Type: Application
    Filed: August 12, 2019
    Publication date: February 20, 2020
    Inventors: Myung-Sun BAEK, Joon-Young JUNG, Dong-Joon CHOI, Heung-Mook KIM
  • Patent number: 10425906
    Abstract: Disclosed herein are an apparatus and method for detecting an upstream RF signal based on a preamble. The apparatus for detecting an upstream RF signal based on a preamble includes an analog-to-digital converter unit for receiving an RF analog signal and converting the same into an RF digital signal; a down-converter unit for converting the RF digital signal into a baseband digital signal; a packet detection unit for performing packet detection by performing an operation on the baseband digital signal and preset differential preamble signals; and a timing calculation unit for generating timing information of a terminal device based on the baseband digital signal and time information generated through the packet detection.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: September 24, 2019
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sang-Jung Ra, Jin-Hyuk Song, Ho-Sook Lee, Dong-Joon Choi, Joon-Young Jung, Nam-Ho Hur
  • Patent number: 10333643
    Abstract: An apparatus and a method for converting an upstream radio frequency (RF) signal to a digital signal and transmitting the digital signal via an Internet protocol (IP) packet based on an optical network in a cable broadcasting network is provided. The apparatus for transmitting an upstream RF signal includes a detector configured to detect an upstream RF signal, and a transmitter configured to digitize the detected upstream RF signal and transmit the digitized RF signal to a headend via an IP packet.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: June 25, 2019
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Joon Young Jung, Jae Ho Lee, Dong Joon Choi, Nam Ho Hur
  • Publication number: 20190182515
    Abstract: Disclosed herein are an apparatus and method for providing a broadcasting service. The method for providing a broadcasting service is performed using a broadcasting service provision apparatus and a terminal device, and includes performing, by the broadcasting service provision apparatus and the terminal device, initialization using information acquired from a downstream signal received from a Cable Modem Termination System (CMTS), converting, by the terminal device, an upstream signal received from a Cable Modem (CM) into a digital signal, encapsulating the digital signal into an IP packet, and transmitting the IP packet to the broadcasting service provision apparatus, and extracting, by the broadcasting service provision apparatus, the digital signal from the IP packet received from the terminal device, converting the digital signal into an analog signal, and transmitting an upstream signal corresponding to the analog signal to the CMTS.
    Type: Application
    Filed: November 14, 2018
    Publication date: June 13, 2019
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Tae-Kyoon Kim, Dong-Joon Choi, Eun-Hee Hyun, Yong-Seong Cho, Joon-Young Jung, Heung-Mook Kim
  • Publication number: 20190174200
    Abstract: Disclosed herein are a method for providing an ad-hoc broadcast service based on channel sharing and an apparatus for the same. The method is configured such that a master broadcast transmitter for providing an ad-hoc broadcast service receives a request to share a channel from a new broadcast transmitter, allocates one of multiple subframes, into which the transmission frame of any one broadcast channel corresponding to the ad-hoc broadcast service is divided, to the new broadcast transmitter, and controls the new broadcast transmitter in real time by performing synchronization with the new broadcast transmitter based on reference time information included in a control Physical Layer Pipe (PLP).
    Type: Application
    Filed: December 5, 2018
    Publication date: June 6, 2019
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Dong-Joon CHOI, Heung-Mook KIM, Sung-Ik PARK, Joon-Young JUNG, Yong-Seong CHO
  • Patent number: 10291422
    Abstract: Disclosed herein is a synchronization method for transmitting a DOCSIS upstream signal, which is performed by an RoIP terminal, the synchronization method including receiving a synchronization (SYNC) message periodically sent by a Cable Modem Termination System (CMTS) and thereby synchronizing a clock and generating a reference time; receiving a ranging request signal from a Cable Modem (CM); including information about a start time of an allocated ranging interval in the ranging request signal, converting the ranging request signal into an IP packet, and transmitting the IP packet to an RoIP headend device over an IP network in order to enable the RoIP headend device to convert the ranging request signal, delivered via the IP network, into an RF signal and transmit the RF signal to the CMTS; and converting a ranging response message delivered from the CMTS into an electric signal and transmitting the electric signal to the CM.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: May 14, 2019
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Dong-Joon Choi, Joon-Young Jung, Nam-Ho Hur
  • Patent number: 10193687
    Abstract: Disclosed are a method for acquiring synchronization in a cable network, and a physical (PHY) transmitter and PHY receiver. The method for acquiring synchronization in a cable network according to an embodiment includes receiving, by a PHY receiver, a signal from a PHY transmitter, and acquiring, by the PHY receiver, channel synchronization when a symbol in which a channel preamble exists is detected from the received signal and a position of a frequency in which a channel subcarrier exists is detected from the detected symbol by performing a cross correlation operation on the received signal and the channel preamble.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: January 29, 2019
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jae Hwui Bae, Sang Jung Ra, Jin Hyuk Song, Dong Joon Choi, Nam Ho Hur
  • Patent number: 10110275
    Abstract: A method of estimating an integer frequency offset and compensating for the integer frequency offset by an estimated error is provided. A frequency offset estimation method may include receiving a reception signal including PLC data and a physical layer link channel (PLC) preamble, detecting first position information on a position of a subcarrier of the PLC preamble in a frequency axis from the reception signal through a cross-correlation between the PLC preamble and the reception signal, detecting second position information on the position of the subcarrier of the PLC preamble defined in a transmission end by restoring the PLC data, and calculating a frequency offset by comparing the first position information with the second position information.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: October 23, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jae Hwui Bae, Sang-Jung Ra, Jin Hyuk Song, Joon Young Jung, Dong Joon Choi, Namho Hur
  • Publication number: 20180287823
    Abstract: Disclosed are a roll-off period detection method, a symbol starting point detection method, a fractional frequency offset estimating method, and an OFDM downstream system using the same. A method of detecting a roll-off period in an OFDM downstream system according to an embodiment of the present disclosure may include: generating a temporary roll-off period by applying a windowing function to a signal having a preset length; and detecting a roll-off period based on any one of a cross correlation and a sum of differences between a detection target signal included in a range of two OFDM symbol signals based on a detection starting point, and the temporary roll-off period.
    Type: Application
    Filed: January 8, 2018
    Publication date: October 4, 2018
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jae Hwui BAE, Jin Hyuk SONG, Je Won LEE, Joon Young JUNG, Dong Joon CHOI, Nam Ho HUR
  • Publication number: 20180167902
    Abstract: Disclosed herein are an apparatus and method for detecting an upstream RF signal based on a preamble. The apparatus for detecting an upstream RF signal based on a preamble includes an analog-to-digital converter unit for receiving an RF analog signal and converting the same into an RF digital signal; a down-converter unit for converting the RF digital signal into a baseband digital signal; a packet detection unit for performing packet detection by performing an operation on the baseband digital signal and preset differential preamble signals; and a timing calculation unit for generating timing information of a terminal device based on the baseband digital signal and time information generated through the packet detection.
    Type: Application
    Filed: November 21, 2017
    Publication date: June 14, 2018
    Inventors: Sang-Jung Ra, Jin-Hyuk Song, Ho-Sook Lee, Dong-Joon Choi, Joon-Young Jung, Nam-Ho Hur
  • Publication number: 20180145843
    Abstract: Disclosed herein is a synchronization method for transmitting a DOCSIS upstream signal, which is performed by an RoIP terminal, the synchronization method including receiving a synchronization (SYNC) message periodically sent by a Cable Modem Termination System (CMTS) and thereby synchronizing a clock and generating a reference time; receiving a ranging request signal from a Cable Modem (CM); including information about a start time of an allocated ranging interval in the ranging request signal, converting the ranging request signal into an IP packet, and transmitting the IP packet to an RoIP headend device over an IP network in order to enable the RoIP headend device to convert the ranging request signal, delivered via the IP network, into an RF signal and transmit the RF signal to the CMTS; and converting a ranging response message delivered from the CMTS into an electric signal and transmitting the electric signal to the CM.
    Type: Application
    Filed: October 25, 2017
    Publication date: May 24, 2018
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Dong-Joon CHOI, Joon-Young JUNG, Nam-Ho HUR