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).

  • Publication number: 20130174209
    Abstract: A method and apparatus for transmitting and receiving Ultra High Definition (UHD) broadcasting service in a digital broadcasting system are provided. The method includes receiving a TS through a transport channel, determining whether or not the TS includes information about an association relation with other TSs, analyzing the information about the association relation from the TS, determining whether or not the TS includes information about a program provided in association with the other TSs based on the information about the association relation, extracting the information about the program from the TS, and obtaining the program based on the information about the program. In accordance with the present invention, high definition broadcasting service can be provided because a broadcasting program having a great transmission bandwidth can be transmitted and received in a digital broadcasting system.
    Type: Application
    Filed: July 31, 2012
    Publication date: July 4, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Joon Young JUNG, Dong Joon CHOI, Nam Ho HUR
  • Patent number: 8472442
    Abstract: A method and apparatus of classifying downstream service flows for a cable modem is provided. A method of classifying downstream service flows, the method including: classifying a service flow based on a Quality of Service (QoS) using a destination address of an inputted packet; composing an internal header including corresponding service flow information based on the classifying of the service flow; and adding the internal header to the inputted packet.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: June 25, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Ho-Sook Lee, Hye Ju Oh, Dong Joon Choi, O Hyung Kwon, Soo In Lee
  • Publication number: 20130129021
    Abstract: Provided is an automatic gain controlling device that may prevent deterioration in performance of an orthogonal frequency division multiplexing (OFDM) receiver, on a cable network that performs communication by an orthogonal frequency division multiplexing (OFDM) scheme using high-order quadrature amplitude modulation (QAM), the automatic gain controlling device including a power computing unit to compute a power of a signal received by the OFDM receiver, and a gain controller to control a gain of the received signal based on the computed power of the received signal.
    Type: Application
    Filed: July 17, 2012
    Publication date: May 23, 2013
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jae Ho LEE, Yang Su KIM, Han Seung KOO, Sang Jung RA, Dong Joon CHOI, Nam Ho HUR
  • Publication number: 20130128732
    Abstract: An apparatus and method for fast load balancing bandwidth allocation based on a binary search may be provided, wherein the apparatus may include a bandwidth allocation request receiving unit to receive a bandwidth allocation request signal from at least one modem, and a bandwidth allocation processing unit to allocate a bandwidth to an upstream channel of the at least one modem, using a load balancing algorithm, in response to the received bandwidth allocation request signal.
    Type: Application
    Filed: September 12, 2012
    Publication date: May 23, 2013
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Han Seung KOO, Dong Joon CHOI, Nam Ho HUR
  • Patent number: 8409338
    Abstract: The present invention relates to a cooling system. More particularly, the present invention relates to a cooling system for removing dust from air being drawn for cooling heat generation components of an electronic product, for improving convenience in maintenance or repair of the electronic product.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: April 2, 2013
    Assignee: LG Electronics Inc.
    Inventors: Ye Yong Kim, Dong Joon Choi
  • 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
  • Publication number: 20120124628
    Abstract: A mobile terminal constituting a multi-screen service environment in a switched digital video (SDV)-based video transmission system structure serves like a remote controller of a reception terminal having a large screen such as a TV. A broadcast channel viewed in the mobile terminal can be shared with the large screen of the TV or the like, and a program can be directly viewed in the large screen of the TV or the like based on program guide information received by the mobile terminal.
    Type: Application
    Filed: November 10, 2011
    Publication date: May 17, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Soon Choul KIM, Dong Joon CHOI, Ho Sook LEE, Soo In LEE
  • Publication number: 20110247032
    Abstract: A method for installing different security clients for channels in a terminal in a conditional access system includes: searching one or more channels searchable in the terminal; requesting, for respective searched channels, security clients necessary for receiving pay programs to be transmitted through the searched channels, to a broadcasting station which takes charge of the searched channels; and downloading and installing, for respective searched channels, the requested security clients from the broadcasting station.
    Type: Application
    Filed: March 31, 2011
    Publication date: October 6, 2011
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Han-Seung KOO, O-Hyung KWON, Dong-Joon CHOI, Soo-In LEE
  • Publication number: 20110149826
    Abstract: Provided is a Broadcasting Media Access Control (BMAC) device for providing a high-speed and high-capacity broadcasting service via a multi-channel broadcasting network. The BMAC device includes: an input packet classifier for generating a BMAC packet by inserting a serial number according to an input order of a plurality of input packets constituting one of contents; a BMAC packet scheduler for distributing the BMAC packet into a plurality of channels; and a plurality of encapsulators for multiplexing the BMAC packet distributed into the plurality of channels into a transport stream.
    Type: Application
    Filed: November 8, 2010
    Publication date: June 23, 2011
    Applicant: Electronics and Telecommunications Research Institute
    Inventor: Dong Joon CHOI
  • Patent number: 7961754
    Abstract: Provided are an apparatus and a method for multimedia data transmission in a cable network using a broadband and physical layer frame structure. The apparatus includes an external network matching module for transmitting data inputted/outputted from/to an external network to a Data Over Cable Service Interface Specification (DOCSIS) Media Access Control (MAC) layer, a DOCSIS MAC processor for transmitting the data from the external network matching module to a corresponding destination, a first downstream physical layer processor for handling an existing standard transmission in the data from the DOCSIS MAC processor, a second downstream physical layer processor for dealing with a new broadband transmission in the data from the DOCSIS MAC processor, and an upstream physical layer processor for providing received data to the DOCSIS MAC processor.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: June 14, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Dong-Joon Choi, O-Hyung Kwon, Soo-In Lee
  • Patent number: 7912050
    Abstract: Provided is a method for classifying packets in a cable modem termination system (CMTS) supporting a channel bonding mode.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: March 22, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Ho Sook Lee, Dong Joon Choi, O Hyung Kwon, Soo In Lee
  • Publication number: 20110027137
    Abstract: The present invention relates to a cooling system. More particularly, the present invention relates to a cooling system for removing dust from air being drawn for cooling heat generation components of an electronic product, for improving convenience in maintenance or repair of the electronic product.
    Type: Application
    Filed: June 15, 2010
    Publication date: February 3, 2011
    Inventors: Ye Yong Kim, Dong Joon Choi
  • Patent number: 7778246
    Abstract: Provided is an IP data transmission apparatus using a legacy transmission system and a broadband downstream transmission system in a HFC network. The IP data transmission apparatus includes: an headend unit for receiving data from an application server system that is a service providing apparatus, splitting the received data into general user data and management message, determining whether the general user is transmitted using a broadband or an existing service band, and transmitting the general user data through the HFC network; and a user cable terminal unit for receiving the split data transmitted from the headend unit through the HFC network, transmitting the received data to an IP based user device, and transferring the management message to the IP based user device through the legacy transmission system.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: August 17, 2010
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Dong-Joon Choi, Woong-Shik You, O-Hyung Kwon, Soo-In Lee
  • Publication number: 20100157920
    Abstract: Provided is an apparatus for a channel bandwidth allocation, the apparatus including: an information sorting unit to receive bandwidth allocation request information, to sort the received bandwidth allocation request information according to a priority, and to transfer any one of the sorted bandwidth allocation request information to a minislot allocation unit; and a calculation unit to apply a multiplier to a number of bytes, and to transfer, to the minislot allocation unit, the bandwidth allocation request information where a number of requested bytes is calculated, when the bandwidth allocation request information is byte-based bandwidth allocation request information, wherein the minislot allocation unit allocates a minislot based on the bandwidth allocation request information and predetermined setting information.
    Type: Application
    Filed: October 19, 2009
    Publication date: June 24, 2010
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Dong Joon CHOI, O Hyung KWON, Soo In LEE
  • Publication number: 20100158036
    Abstract: Provided is a method and apparatus for effectively receiving channel bonded upstream burst data in a Hybrid Fiber Cable (HFC) network.
    Type: Application
    Filed: November 30, 2009
    Publication date: June 24, 2010
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Dong Joon CHOI, O Hyung KWON, Soo In LEE
  • Patent number: 7609727
    Abstract: Provided is an apparatus for transmitting/receiving communication and broadcasting data. The transmitting apparatus includes: a mapper for mapping inputted broadcasting data into a transport stream according to a predetermined standard; a broadcasting buffer for temporarily storing the mapped transport stream for multiplexing; a communication buffer for temporarily storing a communication data stream for multiplexing; a counter for measuring data rate information of a broadcasting stream inputted between two SYNC signals and outputting the measured data rate; an SYNC signal generator for generating an SYNC signal for synchronization between the transmitting apparatus and a receiving part and periodically transmitting the generated SYNC signal; and a multiplexer for multiplexing a communication stream, a broadcasting stream, and an SYNC signal.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: October 27, 2009
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Dong-Joon Choi, O-Hyung Kwon, Soo-In Lee