Patents by Inventor Seung-Rog Choi

Seung-Rog 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).

  • Digital data compression and decompression device
    Patent number: 10312935
    Abstract: There is provided a digital data compression device including a domain converter configured to perform frequency domain conversion on input digital I/Q data and output coefficient data corresponding to the digital I/Q data; a data converter configured to receive the coefficient data output from the domain converter and convert the input coefficient data of Cartesian coordinates into coefficient data of polar coordinates; and a quantizer configured to quantize the coefficient data of the polar coordinates output from the data converter.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: June 4, 2019
    Assignee: SOLiD, INC.
    Inventors: Hee Cheol Yun, Seung Rog Choi, Sun Keun Yu, Tae Hyeong Kim
  • DIGITAL DATA COMPRESSION AND DECOMPRESSION DEVICE
    Publication number: 20180262206
    Abstract: There is provided a digital data compression device including a domain converter configured to perform frequency domain conversion on input digital I/Q data and output coefficient data corresponding to the digital I/Q data; a data converter configured to receive the coefficient data output from the domain converter and convert the input coefficient data of Cartesian coordinates into coefficient data of polar coordinates; and a quantizer configured to quantize the coefficient data of the polar coordinates output from the data converter.
    Type: Application
    Filed: March 7, 2016
    Publication date: September 13, 2018
    Applicant: SOLiD, INC.
    Inventors: Hee Cheol YUN, Seung Rog CHOI, Sun Keun YU, Tae Hyeong KIM
  • Passive wavelength division multiplexing device for automatic wavelength locking and system thereof
    Patent number: 9106361
    Abstract: The present invention relates to a passive wavelength division multiplexing device for automatic wavelength locking and a system thereof including an optical multiplexer, an optical filter, an integrated optical receiver monitor, and a tunable optical transmitter. Through wavelength locking that adjusts a wavelength of an optical signal, which changes according to an external environment such as a temperature change, into a wavelength of an optical signal having the maximum optical intensity, communication quality may be maximized by securing a stable communication channel, a locking time and a communication channel setting time may be reduced, and more robust locking may be guaranteed.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: August 11, 2015
    Assignees: SOLID, INC., SOLID SYSTEMS, INC., CHEMOPTICS, INC.
    Inventors: Ki-Woon Na, Woo-Jin Lee, Kwon-Hoon Han, Seung-Rog Choi, Tae-Hyeong Kim, Young-Ouk Noh
  • PASSIVE WAVELENGTH DIVISION MULTIPLEXING DEVICE FOR AUTOMATIC WAVELENGTH LOCKING AND SYSTEM THEREOF
    Publication number: 20130315585
    Abstract: The present invention relates to a passive wavelength division multiplexing device for automatic wavelength locking and a system thereof including an optical multiplexer, an optical filter, an integrated optical receiver monitor, and a tunable optical transmitter. Through wavelength locking that adjusts a wavelength of an optical signal, which changes according to an external environment such as a temperature change, into a wavelength of an optical signal having the maximum optical intensity, communication quality may be maximized by securing a stable communication channel, a locking time and a communication channel setting time may be reduced, and more robust locking may be guaranteed.
    Type: Application
    Filed: November 30, 2010
    Publication date: November 28, 2013
    Applicants: SOLID, INC., CHEMOPTICS INC., SOLID SYSTEMS, INC.
    Inventors: Ki-Woon Na, Woo-Jin Lee, Kwon-Hoon Han, Seung-Rog Choi, Tae-Hyeong Kim, Young-Ouk Noh