Patents by Inventor Kee Choi
Kee 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).
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Publication number: 20120155533Abstract: A system and method for adaptive motion filtering to improve subpel motion prediction efficiency of interframe motion compensated video coding is described. The technique uses a codebook approach that is efficient in search complexity to look-up best motion filter set from a pre-calculated codebook of motion filter coefficient set. In some embodiments, the search complexity is further reduced by partitioning the complete codebook into a small base codebook and a larger virtual codebook, such that the main calculations for search only need to be performed on the base codebook.Type: ApplicationFiled: December 21, 2010Publication date: June 21, 2012Inventors: Atul Puri, Daniel Socek, Chang-Kee Choi
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Patent number: 8144603Abstract: IP state-vector manager determines state vector value by updating token numbers of IP state vector according to source and destination IP addresses of the received packet, and obtains state number of state vector value by counting state vector value. Port-number state-vector manager determines state vector value by updating token numbers of port-number state vector according to source and destination token numbers of packet, and obtains state number of state vector value by counting state vector value. Entropy calculator calculates entropies related to IP address and port number, based on number and state number of state vector values related to IP state vector and port-number state vector. Anomalous event determiner determines whether there is anomalous event in network based on calculated entropies. Anomalous event can be efficiently detected with minimized false negative and positive rates.Type: GrantFiled: January 12, 2010Date of Patent: March 27, 2012Assignee: Sungkyunkwan University Foundation For Corporate CollaborationInventors: Hyoung-Kee Choi, Chan-Kyu Han
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Patent number: 8145906Abstract: Provided is a binding update method in MIPv6 which includes: a first step of generating, with a mobile node, a HoTI (Home Test Init) message and transmitting the HoTI message to a corresponding node; a second step of generating a CoTI (Care of Test Init) message and transmitting the CoTI message to the corresponding node; a third step of generating, with the corresponding node, a HoT (Home of Test) message and transmitting the HoT message to the mobile node; a fourth step of generating a CoT (Care-of Test) message and transmitting the CoT message to the mobile node; a fifth step of generating, with the mobile node, a BU (Binding Update) message and transmitting the BU message to the corresponding node; and a sixth step of verifying, with the corresponding node, the BU message and transmitting a BA (Binding Ack) message to the mobile node.Type: GrantFiled: February 24, 2009Date of Patent: March 27, 2012Assignee: Sungkyunkwan University Foundation for Corporate CollaborationInventors: Hyoung Kee Choi, Se Hwa Song, Eun Young Lee, Yi Jin Im, In Hwan Kim, Yae Hoe Kim
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Patent number: 8112065Abstract: A method of mobile authentication with enhanced mutual authentication and handover security is disclosed. The method of mutual authentication in a mobile network in accordance with an embodiment of the present invention includes: generating at least one service ticket and session key corresponding to a mobile station in accordance with an authentication data request for the mobile station; encrypting the service ticket and the session key by using a user security key pre-assigned in accordance with the mobile station; sending the encrypted service ticket and session key to the mobile station by using a control message; and authenticating the mobile station by analyzing user mutual authentication information received from the mobile station. The present invention, therefore, can provide a more powerful and effective mutual authentication method in a mobile network.Type: GrantFiled: February 29, 2008Date of Patent: February 7, 2012Assignee: Sungkyunkwan University Foundation for Corporate CollaborationInventors: Hyoung-Kee Choi, Chan-Kyu Han
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Patent number: 8090350Abstract: Provided is a resynchronization method of a mobile communication terminal. The resynchronization method for a mobile communication terminal connected to a home location register and a mobile communication network, includes: extracting a communication network serial number corresponding to a terminal authentication request instruction received from a mobile communication network; comparing the communication network serial number with a terminal serial number stored in a predetermined memory; generating nth terminal synchronization failure information if the communication network serial number is smaller than the terminal serial number, where n is a nature number; and transmitting the generated nth terminal synchronization failure information to the home location register. The home location register ends a resynchronization procedure if the nth terminal synchronization failure information is smaller than previously stored (n?1)th communication network synchronization failure information.Type: GrantFiled: March 13, 2008Date of Patent: January 3, 2012Assignee: Sungkyunkwan University Foundation for Corporate CollaborationInventors: Hyoung-Kee Choi, Sung-Jae Cho
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Publication number: 20110141915Abstract: IP state-vector manager determines state vector value by updating token numbers of IP state vector according to source and destination IP addresses of the received packet, and obtains state number of state vector value by counting state vector value. Port-number state-vector manager determines state vector value by updating token numbers of port-number state vector according to source and destination token numbers of packet, and obtains state number of state vector value by counting state vector value. Entropy calculator calculates entropies related to IP address and port number, based on number and state number of state vector values related to IP state vector and port-number state vector. Anomalous event determiner determines whether there is anomalous event in network based on calculated entropies. Anomalous event can be efficiently detected with minimized false negative and positive rates.Type: ApplicationFiled: January 12, 2010Publication date: June 16, 2011Inventors: Hyoung-Kee CHOI, Chan-Kyu Han
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Publication number: 20110094558Abstract: Provided is a greenhouse including transparent solar batteries disposed on an outer wall of the greenhouse. Since the transparent solar batteries are disposed on an outer wall of the greenhouse, the greenhouse may generate pollution-free energy while allowing greenhouse cultivation.Type: ApplicationFiled: October 27, 2009Publication date: April 28, 2011Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Mun Kee CHOI, Soo Young OH, Yong Seok JUN, Hunkyun PAK
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Publication number: 20100080261Abstract: The present invention relates to a simulation test system for thermal impact ageing of a power transmission insulator which simulation tests an influence of a forest fire on the power transmission insulator.Type: ApplicationFiled: September 25, 2009Publication date: April 1, 2010Applicant: KOREA ELECTRIC POWER CORPORATIONInventors: Won-Kyo Lee, In-Hyuk Choi, Jong-Kee Choi, Kap-Cheol Hwang
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Publication number: 20100031356Abstract: A binding update method in MIPv6 is provided which includes: a first step of allowing a mobile node to generate a HoTI (Home Test Init) message including a HoA (Home Address) encoded with a product of a first prime number and a second prime number and to transmit the HoTI message to a corresponding node through a home agent along with a first index; a second step of allowing the mobile node to generate a CoTI (Care of Test Init) message including a CoA (Care-of Address) encoded with a product of the first prime number and a third prime number and to transmit the CoTI message directly to the corresponding node along with a second index; a third step of allowing the corresponding node to generate a HoT (Home of Test) message including a first nonce and to transmit the HoT message to the mobile node through the home agent; a fourth step of allowing the corresponding node to generate a CoT (Care-of Test) message including a second nonce and to transmit the CoT message to the mobile node; a fifth step of allowingType: ApplicationFiled: February 24, 2009Publication date: February 4, 2010Applicant: SUNGKYUNKWAN UNIVERSITY Foundation for Corporate CollaborationInventors: Hyoung Kee CHOI, Se Hwa SONG, Eun Young LEE, Yi Jin IM, In Hwan KIM, Yae Hoe KIM
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Publication number: 20090214043Abstract: A method of and an authentication server for distributing a key are disclosed. According to an embodiment of the present invention, the method of distributing a key, which is distributed by an authentication server connected with wireless terminals through a communication network, for encrypting and decrypting data in accordance with providing a service can include: obtaining characteristic information by decrypting encrypted characteristic information that has been received from each of n number of wireless terminals; generating a random key; generating a group key used for encrypting and decrypting data in accordance with providing a service; and generating a distribution key by using the random key, the group key and the characteristic information, and transmitting the distribution key to each wireless terminal.Type: ApplicationFiled: December 1, 2008Publication date: August 27, 2009Applicant: SUNGKYUNKWAN UNIVERSITY FOUNDATION FOR CORPORATE COLLABORATIONInventors: Hyoung-Kee Choi, Jung-Yoon Kim, Do-Hyun Kwon, Eun-Young Lee, In-Hwan Kim, Se-Hwa Song
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Publication number: 20090029677Abstract: A method of mobile authentication with enhanced mutual authentication and handover security is disclosed. The method of mutual authentication in a mobile network in accordance with an embodiment of the present invention includes: generating at least one service ticket and session key corresponding to a mobile station in accordance with an authentication data request for the mobile station; encrypting the service ticket and the session key by using a user security key pre-assigned in accordance with the mobile station; sending the encrypted service ticket and session key to the mobile station by using a control message; and authenticating the mobile station by analyzing user mutual authentication information received from the mobile station. The present invention, therefore, can provide a more powerful and effective mutual authentication method in a mobile network.Type: ApplicationFiled: February 29, 2008Publication date: January 29, 2009Applicant: SUNGKYUNKWAN UNIVERSITY FOUNDATION FOR CORPORATE COLLABORATIONInventors: Hyoung-Kee CHOI, Chan-Kyu Han
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Publication number: 20090029678Abstract: Provided is a resynchronization method of a mobile communication terminal. The resynchronization method for a mobile communication terminal connected to a home location register and a mobile communication network, includes: extracting a communication network serial number corresponding to a terminal authentication request instruction received from a mobile communication network; comparing the communication network serial number with a terminal serial number stored in a predetermined memory; generating nth terminal synchronization failure information if the communication network serial number is smaller than the terminal serial number, where n is a nature number; and transmitting the generated nth terminal synchronization failure information to the home location register. The home location register ends a resynchronization procedure if the nth terminal synchronization failure information is smaller than previously stored (n?1)th communication network synchronization failure information.Type: ApplicationFiled: March 13, 2008Publication date: January 29, 2009Applicant: SUNGKYUNKWAN UNIVERSITY FOUNDATION FOR CORPORATE COLLABORATIONInventors: Hyoung-Kee Choi, Sung-Jae Cho
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Publication number: 20070152293Abstract: A semiconductor device is provided. The semiconductor device according to the present invention includes a semiconductor substrate, a second insulation layer, a buffer insulation layer adjacent to the second insulation layer, a third insulation layer and transistors. A high voltage device region and a low voltage device region are defined in the semiconductor substrate. The second and third insulation layers are formed in the high and low voltage device regions, respectively. The transistors are formed on the second and third insulation layers, respectively.Type: ApplicationFiled: December 27, 2006Publication date: July 5, 2007Inventor: Kee Choi
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Publication number: 20070070281Abstract: A liquid crystal display device comprises first and second substrates that face each other, first and second lines formed on the first substrate in first and second directions that cross each other, respectively. The liquid crystal display device further comprises a protrusion formed at a predetermined portion on the first line, a first column spacer formed on the second substrate so as to correspond to the protrusion and having a corresponding surface with respect to the protrusion. The corresponding surface is wider than the protrusion. The liquid crystal display device also comprises a compensation pattern formed at another predetermined portion on the first line where the protrusion is not formed, and having a lower height than the protrusion, a second column spacer corresponding to the compensation pattern. The liquid crystal display device then comprises a liquid crystal layer between the first and second substrates. A method for manufacturing the LCD device is also disclosed.Type: ApplicationFiled: June 29, 2006Publication date: March 29, 2007Inventor: Kee Choi
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Patent number: 7148116Abstract: A semiconductor device with a load resistor is manufactured such that a contact is formed at both ends of the load resistor, and at least one contact is formed between the contacts, in order to prevent impurities from being generated within each contact while the contacts are being generated by etching an insulation layer phenomena of electric charge build up from occurring when an etching process fabricates an insulation layer to generate the contact in a long load resistor located under the insulation layer and insulated electrically and physically.Type: GrantFiled: June 30, 2005Date of Patent: December 12, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Won Shik Lee, Joon-Mo Kwon, Tae Kyung Kim, Jin-Kee Choi, Dong-Gun Park, Hyeong-Chan Ko, Hong-Joon Moon
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Patent number: 7084478Abstract: A semiconductor device with a load resistor is manufactured such that a contact is formed at both ends of the load resistor, and at least one contact is formed between the contacts, in order to prevent impurities from being generated within each contact while the contacts are being generated by etching an insulation layer phenomena of electric charge build up from occurring when an etching process fabricates an insulation layer to generate the contact in a long load resistor located under the insulation layer and insulated electrically and physically.Type: GrantFiled: October 16, 2002Date of Patent: August 1, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Won Shik Lee, Joon-Mo Kwon, Tae Kyung Kim, Jin-Kee Choi, Dong-Gun Park, Hyeong-Chan Ko, Hong-Joon Moon
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Publication number: 20060133009Abstract: A capacitor and a method for manufacturing the same provide a branched capacitor with a large capacitance and a super-slim structure. The method includes sintering a ceramic substrate; forming a plurality of troughs in the sintered ceramic substrate, the plurality of troughs including first and second sets of troughs corresponding to opposing electrodes; and filling the troughs with metal to form a plurality of metal lines arranged alternately in the plurality of troughs.Type: ApplicationFiled: December 22, 2005Publication date: June 22, 2006Inventor: Kee Choi
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Publication number: 20060125990Abstract: An LCD device and a method for manufacturing the same are disclosed in which if an overcoating layer is not formed on a color filter substrate, a gap between exposed pigments is filled with a column spacer material to increase a process margin.Type: ApplicationFiled: November 30, 2005Publication date: June 15, 2006Inventors: Dong Lee, Kee Choi
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Publication number: 20060001825Abstract: An LCD and method are provided in which a cell gap between substrates is maintained and an overcharge of liquid crystal is prevented. In the LCD, a first substrate includes a TFT and a color filter layer and a second substrate faces the first substrate. A column spacer is formed on the first substrate and a protrusion is formed on the second substrate at a position corresponding to the column spacer. And, a liquid crystal layer is formed between the first and second substrates.Type: ApplicationFiled: June 27, 2005Publication date: January 5, 2006Inventors: Kee Choi, Sung Jo
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Publication number: 20050255662Abstract: A semiconductor device with a load resistor is manufactured such that a contact is formed at both ends of the load resistor, and at least one contact is formed between the contacts, in order to prevent impurities from being generated within each contact while the contacts are being generated by etching an insulation layer phenomena of electric charge build up from occurring when an etching process fabricates an insulation layer to generate the contact in a long load resistor located under the insulation layer and insulated electrically and physically.Type: ApplicationFiled: June 30, 2005Publication date: November 17, 2005Inventors: Won Lee, Joon-Mo Kwon, Tae Kim, Jin-Kee Choi, Dong-Gun Park, Hyeong-Chan Ko, Hong-Joon Moon