Patents by Inventor Young Kwon Hahm

Young Kwon Hahm 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).

  • Publication number: 20140307830
    Abstract: An apparatus for offset compensation in high-order modulated orthogonal frequency division multiplexing (OFDM) transmission, the apparatus including a transmitter to configure a pilot signal for transmission and reception synchronization and distortion estimation as a frame, and transmit the frame, and a receiver to estimate a channel distortion of a received signal by estimating and compensating for a clock offset and a frequency offset with respect to the received signal.
    Type: Application
    Filed: April 4, 2014
    Publication date: October 16, 2014
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Young Kwon HAHM, Dong Joon CHOI, Nam Ho HUR
  • Patent number: 8861548
    Abstract: Disclosed herein are a method and an apparatus for transmitting data in a cable network. The transmitter generates upper layer data including multiplexed data of a plurality of subscriber terminals, dividing the upper layer data into a plurality of segment data, performs channel coding on each segment data, extracts information on at least one subscriber terminal included in each segment data to generate subscriber identification signals, inserts the subscriber identification signals into each channel-coded segment data, and modulates and transmits each segment data into which the subscriber identification signals are inserted.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: October 14, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Young Kwon Hahm, Dong Joon Choi, Nam Ho Hur
  • Publication number: 20140133597
    Abstract: Disclosed are a method for transmitting and receiving data and an apparatus thereof, and more particularly, a method for transmitting and receiving data and an apparatus thereof in an orthogonal frequency division multiplexing (OFDM) system. The method for transmitting data in an OFDM system according to the present invention includes encoding and modulating data to be transmitted, configuring the modulated data by a frame constituted by N (an integer larger than 0) OFDM symbols, and transmitting the configured frame, in which the frame includes a first OFDM symbol including a pilot symbol and a second OFDM symbol including lower-order modulated than the modulated data.
    Type: Application
    Filed: February 28, 2013
    Publication date: May 15, 2014
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Young Kwon HAHM, Dong Joon CHOI, Nam Ho HUR
  • Patent number: 8724996
    Abstract: Provided are a transmission apparatus and a transmission method for a subscriber network in a cable network. A passive optical network (GPON) receiver receives data packets through a fiber line using a plurality of optical wavelengths from a head end. A micro cable modem termination system (CMTS) converts the data packets into a data over cable service interface specification (DOCSIS)-based DOCSIS frame and transmits the DOCSIS frame to at least one subscriber device through a coaxial line.
    Type: Grant
    Filed: October 18, 2011
    Date of Patent: May 13, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Woongshik You, Dong Joon Choi, Young Kwon Hahm, Soo In Lee
  • Patent number: 8665169
    Abstract: Provided is a small monopole antenna, which can generate a plurality of resonant frequencies, have a high antenna efficiency, and be easily installed. The antenna includes a first antenna element formed of a coaxial cable; a second antenna element sealing the first antenna element and sharing a feed point with the first antenna element; and a feeder cable for feeding electric power to the feed point. This antenna is applied as a small antenna.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: March 4, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Je-Hoon Yun, Soon-Young Eom, Joung-Myoun Kim, Yong-Hee Cho, Young-Kwon Hahm, Dae-Young Kim, Soon-Ik Jeon
  • Publication number: 20140007168
    Abstract: The present invention relates to broadcast communication and, more particularly, to a method and apparatus for enabling a terminal capable of receiving mobile broadcast, such as DMB, to additionally receive a broadcast program provided by cable/IPTV/satellite broadcast. A broadcast receiver detects an idle band using a CR method, sends at least one of information about a broadcast channel and information about the idle band to a terminal, receives information that requests to provide a specific broadcast channel of one or more broadcast channels, included in information about a broadcast channel, from the terminal, receives the one or more broadcast channels from a broadcast station, selects the specific broadcast channel from the broadcast channels based on the information requesting to provide the specific broadcast channel, transfers the selected broadcast channel to a mobile broadcast delivery unit, and delivers mobile broadcast for the specific broadcast channel on the idle band.
    Type: Application
    Filed: November 26, 2012
    Publication date: January 2, 2014
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Han Seung KOO, Young Kwon HAHM, Dong Joon CHOI
  • Patent number: 8565110
    Abstract: An apparatus for receiving data in a communication system includes: a detection unit configured to calculate power values of a data packet and a ratio of the power values by using a preamble of the data packet in a received signal, and detect the data packet through the calculated ratio of the power values; a control unit configured to calculate a gain compensation value of the detected data packet, and perform an automatic gain control (AGC) on the detected data packet by using the gain compensation value; a compensation unit configured to calculate a DC offset in the received signal, and remove the DC offset from the received signal; and a demodulator configured to demodulate the AGCed data packet.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: October 22, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jae-Ho Lee, Young-Kwon Hahm, Dong-Joon Choi, Soo-In Lee
  • Publication number: 20120195257
    Abstract: Disclosed herein are a method and an apparatus for transmitting data in a cable network. The transmitter generates upper layer data including multiplexed data of a plurality of subscriber terminals, dividing the upper layer data into a plurality of segment data, performs channel coding on each segment data, extracts information on at least one subscriber terminal included in each segment data to generate subscriber identification signals, inserts the subscriber identification signals into each channel-coded segment data, and modulates and transmits each segment data into which the subscriber identification signals are inserted.
    Type: Application
    Filed: January 26, 2012
    Publication date: August 2, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Young Kwon HAHM, Dong Joon CHOI, Nam Ho HUR
  • Publication number: 20120155878
    Abstract: Provided are a transmission apparatus and a transmission method for a subscriber network in a cable network. A passive optical network (GPON) receiver receives data packets through a fiber line using a plurality of optical wavelengths from a head end. A micro cable modem termination system (CMTS) converts the data packets into a data over cable service interface specification (DOCSIS)-based DOCSIS frame and transmits the DOCSIS frame to at least one subscriber device through a coaxial line.
    Type: Application
    Filed: October 18, 2011
    Publication date: June 21, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Woongshik YOU, Dong Joon CHOI, Young Kwon HAHM, Soo In LEE
  • Publication number: 20120148249
    Abstract: The present invention relates to a cable network using the frequency of a giga band. The optical signal transmission apparatus includes an optical transmission/reception unit converting received RF signals into RF optical signals and transmitting the RF optical signals, an optical line terminal converting received digital signals into digital optical signals and transmitting the digital optical signals, and a multiplexer receiving the optical signals from the optical transmission/reception unit and the optical line terminal and multiplexing the received optical signals.
    Type: Application
    Filed: December 7, 2011
    Publication date: June 14, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Young Kwon HAHM, Dong Joon CHOI, Soo In LEE
  • Publication number: 20120147763
    Abstract: An apparatus for receiving data in a communication system includes: a detection unit configured to calculate power values of a data packet and a ratio of the power values by using a preamble of the data packet in a received signal, and detect the data packet through the calculated ratio of the power values; a control unit configured to calculate a gain compensation value of the detected data packet, and perform an automatic gain control (AGC) on the detected data packet by using the gain compensation value; a compensation unit configured to calculate a DC offset in the received signal, and remove the DC offset from the received signal; and a demodulator configured to demodulate the AGCed data packet.
    Type: Application
    Filed: February 11, 2011
    Publication date: June 14, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jae-Ho LEE, Young-Kwon Hahm, Dong-Joon Choi, Soo-In Lee
  • Publication number: 20120151349
    Abstract: Man-machine interface apparatus and method for an user are provided. The man-machine interface apparatus includes: a touch recognizing unit recognizing a touch by the invisible user; and a voice notifying unit notifying the invisible user of a name of a menu or application service corresponding to the touched position through a voice.
    Type: Application
    Filed: December 8, 2011
    Publication date: June 14, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Young Kwon HAHM, Dong Joon CHOI, Soo In LEE
  • Patent number: 8138824
    Abstract: A recursive demodulation apparatus is provided. Therecursive demodulation apparatus, including: a segment generation unit dividing data symbols with a residual frequency or phase error into a predetermined number of data symbols, and generating a plurality of segments, each of the plurality of segments including the predetermined number of data symbols; and a phase error correction unit sequentially correcting a phase error of each of the data symbols, included in the each of the plurality of segments, for each segment.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: March 20, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Young Kwon Hahm, Eun Sook Jin, Yun Jeong Song, Soo In Lee
  • Patent number: 8116369
    Abstract: Provided are a multi-display supporting multi-view video object-based encoding apparatus and method, and an object-based transmission/reception system and method using the encoding apparatus and method.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: February 14, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Yun jung Choi, Suk-Hee Choi, Kug Jin Yun, Jinhwan Lee, Young Kwon Hahm, Chieteuk Anh
  • Publication number: 20110219415
    Abstract: Provided is a broadcasting receiving method and device. The method detects the time of a televised broadcasting program, and provides the broadcasting program to the user from the start thereof. More specifically, the method requests transmission of the broadcasting program before a first time through the second network at the first time of the broadcasting program before a first time through the second network at the first time of the broadcasting program received through the first network, and stores the broadcasting program received through the first network at the first time. The broadcasting program, which was broadcasted before the first time, received through the second network from the first time to the second time is displayed and the stored broadcasting program after the second time is displayed.
    Type: Application
    Filed: November 4, 2009
    Publication date: September 8, 2011
    Inventors: Young Kwon Hahm, Yun Jeong Song, Soo In Lee
  • Patent number: 7848878
    Abstract: Provided is a geographic information transceiving system and method using a digital broadcasting network. The system and method segments new geographic and map data of a region, on which a geographic information service is provided, makes data segment files of different sizes, and multiplexes and transmits the files.
    Type: Grant
    Filed: September 14, 2004
    Date of Patent: December 7, 2010
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sammo Cho, Geon Kim, Hyun Lee, Gwang-Soon Lee, Young-Kwon Hahm, Chung-hyun Ahn, Soo-In Lee
  • Patent number: 7848425
    Abstract: Stereoscopic video is encoded and decoded by using the MAC defined by the existing MPEG-4 standard. The stereoscopic video is divided into one image as a single video object, and another image as auxiliary information for the image established as the video object. The auxiliary information includes a horizontal disparity map, a vertical disparity map, luminance residual texture, and chrominance residual texture, which are respectively allocated to auxiliary components of the MAC according to importance and complexity of the images, encoded, and then output as a single encoding stream.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: December 7, 2010
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Suk-Hee Cho, Yun-Jung Choi, Kug-Jin Yun, Jin-Hwan Lee, Young-Kwon Hahm, Chieteuk Ahn, Yong-Han Kim
  • Publication number: 20100301931
    Abstract: A recursive demodulation apparatus is provided. Therecursive demodulation apparatus, including: a segment generation unit dividing data symbols with a residual frequency or phase error into a predetermined number of data symbols, and generating a plurality of segments, each of the plurality of segments including the predetermined number of data symbols; and a phase error correction unit sequentially correcting a phase error of each of the data symbols, included in the each of the plurality of segments, for each segment.
    Type: Application
    Filed: July 29, 2008
    Publication date: December 2, 2010
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Young Kwon Hahm, Eun Sook Jin, Yun Jeong Song, Soo In Lee
  • Patent number: 7808561
    Abstract: The present invention relates to an apparatus for transforming digital TV broadcasting signals into digital radio broadcasting signals and a method thereof.
    Type: Grant
    Filed: October 12, 2004
    Date of Patent: October 5, 2010
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hyun Lee, Gwang-Soon Lee, Kyu-Tae Yang, Bong-Ho Lee, Young-Kwon Hahm, Soo-In Lee
  • Publication number: 20100085267
    Abstract: Provided is a small monopole antenna, which can generate a plurality of resonant frequencies, have a high antenna efficiency, and be easily installed. The antenna includes a first antenna element formed of a coaxial cable; a second antenna element sealing the first antenna element and sharing a feed point with the first antenna element; and a feeder cable for feeding electric power to the feed point. This antenna is applied as a small antenna.
    Type: Application
    Filed: October 26, 2007
    Publication date: April 8, 2010
    Applicant: Electronics and Telecommunications Research Instit
    Inventors: Je-Hoon Yun, Soon-Young Eom, Joung-Myoun Kim, Yong-Hee Cho, Young-Kwon Hahm, Dae-Young Kim, Soon-Ik Jeon