Patents by Inventor Hwan-joon Kim

Hwan-joon Kim 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: 20200213990
    Abstract: A method and an apparatus are provided for receiving signaling information in a digital broadcasting system. The method includes receiving a frame including a first coded block, a second coded block, and at least one physical layer pipe (PLP) data; decoding the first coded block to identify first signaling information for a physical layer; and decoding the second coded block to identify second signaling information. The first signaling information has a fixed number of bits. The second signaling information has a variable number of bits. The first signaling information includes information indicating a forward error correction (FEC) type of the second signaling information for receiving the second signaling information. The second signaling information includes information indicating a modulation scheme used for related PLP data.
    Type: Application
    Filed: March 13, 2020
    Publication date: July 2, 2020
    Inventors: Hwan-Joon Kwon, Hak-Ju Lee, Jae-Yael Kim, Yeon-Ju Lim, Sung-Ryul Yun, Hong-Sil Jeong, Seho Myung
  • Patent number: 10595305
    Abstract: A method and an apparatus are provided for transmitting and receiving signaling information in a digital broadcasting system. The method includes encoding first signaling information for a physical layer to generate a first coded block; encoding second signaling information to generate a second coded block; and transmitting a frame including the first coded block, the second coded block, and at least one physical layer pipe (PLP) data. The first signaling information has a fixed number of bits, and the second signaling information has a variable number of bits. The first signaling information includes information indicating a forward error correction (FEC) type of the second signaling information for receiving the second information, and the second signaling information includes information indicating a modulation scheme used for a related PLP data.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: March 17, 2020
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Hwan-Joon Kwon, Hak-Ju Lee, Jae-Yoel Kim, Yeon-Ju Lim, Sung-Ryul Yun, Hong-Sil Jeong, Seho Myung
  • Publication number: 20200077000
    Abstract: A camera module includes a housing having a lens module, an aperture module provided above the lens module and including blades that form incident holes having different sizes in multiple stages or successively, a moving part configured to linearly reciprocate to drive the blades, including a driving magnet facing a driving coil, a position sensor configured to sense a position of the moving part according to interaction with the driving magnet, and a controller configured to receive a signal from the position sensor and confirm or correct the position of the moving part.
    Type: Application
    Filed: February 22, 2019
    Publication date: March 5, 2020
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Kyung Hun LEE, Jae Kyung KIM, Bo Sung SEO, Sang Joon KIM, Sung Ryung PARK, Ho Young JOO, Sang Eun PARK, Hwan Jun KANG
  • Publication number: 20200021418
    Abstract: An apparatus and method are provided for feeding back channel quality information and performing scheduling using the fed-back channel quality information in a wireless communication system based on Orthogonal Frequency Division Multiple Access (OFDMA). In the OFDMA wireless communication system, forward performance degradation due to a decrease in an amount of reverse channel quality information is reduced, and also an increase in the reverse load due to channel quality information feedback is suppressed. A base station controls power of a physical channel using information fed back from a mobile station. In a method for feeding back channel quality information from the mobile station, sub-band-by-sub-band channel quality information is measured and channel-by-channel quality information of a number of channels is transmitted in order of sub-bands of better channel quality information. Average channel quality information for a total band is measured and transmitted.
    Type: Application
    Filed: September 26, 2019
    Publication date: January 16, 2020
    Inventors: Hwan-Joon KWON, Kyeong-In JEONG, Jin-Kyu HAN, Dong-Hee KIM
  • Patent number: 10461816
    Abstract: Methods and apparatus are provided for transmitting data in a communication system with a plurality of antennas. The transmitter generates a first pilot signal and a second pilot signal. Data, the first pilot signal, and the second pilot signal are transmitted over a wireless network. The first pilot signal is transmitted at a first position in a time domain in each transmission time interval of the data over each frequency in a frequency domain used to transmit the data, and the second pilot signal is transmitted at a second position known by the transmitter and a receiver in the time domain and the frequency domain of a transmission time interval.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: October 29, 2019
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Jae-Chon Yu, Hwan-Joon Kwon, Dong-Hee Kim, Yu-Chul Kim, Jin-Kyu Han
  • Patent number: 10456115
    Abstract: An ultrasound system and a clutter filtering method thereof are provided. The clutter filtering method includes: transmitting an ultrasound signal to an object; receiving a reflection signal reflected from the object; performing a singular value decomposition (SVD) on a plurality of doppler signals constituting the reflection signal; dividing a representation of the object into a plurality of regions according to a result of performing the SVD; determining cutoff frequencies of the plurality of regions according to different methods; and performing clutter filtering on the plurality of regions by using the determined cutoff frequencies.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: October 29, 2019
    Assignees: SAMSUNG ELECTRONICS CO., LTD., Industry-University Cooperation Foundation Sogang University
    Inventors: Hyun-woo Koh, Yang-mo Yoo, Sun-mi Yeo, Woo-youl Lee, Young-tae Kim, Hwan Shim, Hyung-joon Lim
  • Patent number: 10432382
    Abstract: An apparatus and method are provided for feeding back channel quality information and performing scheduling using the fed-back channel quality information in a wireless communication system based on Orthogonal Frequency Division Multiple Access (OFDMA). In the OFDMA wireless communication system, forward performance degradation due to a decrease in an amount of reverse channel quality information is reduced, and also an increase in the reverse load due to channel quality information feedback is suppressed. A base station controls power of a physical channel using information fed back from a mobile station. In a method for feeding back channel quality information from the mobile station, sub-band-by-sub-band channel quality information is measured and channel-by-channel quality information of a number of channels is transmitted in order of sub-bands of better channel quality information. Average channel quality information for a total band is measured and transmitted.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: October 1, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hwan-Joon Kwon, Kyeong-In Jeong, Jin-Kyu Han, Dong-Hee Kim
  • Publication number: 20190274128
    Abstract: A method and an apparatus are provided for transmitting and receiving signaling information in a digital broadcasting system. The method includes encoding first signaling information for a physical layer to generate a first coded block; encoding second signaling information to generate a second coded block; and transmitting a frame including the first coded block, the second coded block, and at least one physical layer pipe (PLP) data. The first signaling information has a fixed number of bits, and the second signaling information has a variable number of bits. The first signaling information includes information indicating a forward error correction (FEC) type of the second signaling information for receiving the second information, and the second signaling information includes information indicating a modulation scheme used for a related PLP data.
    Type: Application
    Filed: May 20, 2019
    Publication date: September 5, 2019
    Inventors: Hwan-Joon KWON, Hak-Ju LEE, Jae-Yoel KIM, Yeon-Ju LIM, Sung-Ryul YUN, Hong-Sil JEONG, Seho MYUNG
  • Patent number: 10299253
    Abstract: A method and an apparatus are provided for transmitting and receiving signaling information in a digital broadcasting system. First signaling information for a physical layer is encoded to generate a first coded block. Second signaling information is encoded to generate a second coded block. A frame including the first coded block, the second coded block and at least one physical layer pipe (PLP) data is transmitted. The first signaling information has a fixed number of bits. The second signaling information has a variable number of bits. The first signaling information includes information indicating a forward error correction (FEC) type of the second signaling information for receiving the second information. The second signaling information includes information indicating an FEC type used for a related PLP data.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: May 21, 2019
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Hwan-Joon Kwon, Hak-Ju Lee, Jae-Yoel Kim, Yeon-Ju Lim, Sung-Ryul Yun, Hong-Sil Jeong, Seho Myung
  • Patent number: 9571213
    Abstract: A tag generation method for generating tags used in data packets in a broadcast encryption system is provided. The method includes detecting at least one revoked leaf node; setting a node identification (node ID) assigned to at least one node among nodes assigned node IDs at a layer 0 and to which the at least one revoked leaf node is subordinate, to a node path identification (NPID) of the at least one revoked leaf node at the layer 0; generating a tag list in the layer 0 by combining the NPID of each of the at least one revoked leaf nodes at the layer 0 in order of increment of node IDs of the corresponding at least one revoked leaf nodes; and generating a tag list in a lowest layer by repeatedly performing the setting and generation operation down to the lowest layer.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: February 14, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Weon-il Jin, Maeng-hee Sung, Dae-youb Kim, Hwan-joon Kim
  • Patent number: 9100654
    Abstract: An apparatus and method for video watermarking are provided. The apparatus and method include receiving a bit stream encoded by a video encoder by a spatial domain information analyzer and extracting information from a spatial domain of an image with respect to code words forming the bit stream, grouping the code words for each segmented domain by a domain classifier based on the information from the spatial domain, determining a sign of the each segmented domain by a domain sign determiner and inserting a watermark in the each segmented domain according to the sign determined by the domain sign determiner by a watermark bit inserter.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: August 4, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hwan Joon Kim, Mi Suk Huh, Dae Youb Kim, Chee Sun Won, Sung Min Kim
  • Patent number: 8966511
    Abstract: A computer system and method for preventing a Dynamic-Link Library (DLL) injection attack are provided. The computer system monitors an operation where a process attempts to dynamically link an executable code library to another process, and intercepts the dynamic link of the executable code library.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: February 24, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Eun Ah Kim, Weon Il Jin, Hwan Joon Kim
  • Patent number: 8897445
    Abstract: A combination-based broadcast encryption method includes: assigning by a server a base group of different combinations to each user; producing and sending secret information for each user by using as a base the base group allocated to each user; producing and sending an inverse-base parameter value through calculations with integers used to produce the base group and key value information of one or more privileged users; and deriving a group key by using the key value information of the privileged users, encrypting a session key by using the derived group key, and sending the encrypted session key to each user. Accordingly, each user is assigned a different base through a combination, thereby having security against collusion attacks.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: November 25, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Weon-il Jin, Dae-youb Kim, Hwan-joon Kim, Sung-joon Park
  • Patent number: 8813106
    Abstract: An electronic commerce method and system using an Internet Protocol Television (IPTV) and a mobile terminal are provided. In an electronic commerce method and system, an IPTV or mobile terminal transmits binding information to a server where a purchaser selects product information, the server determines a purchaser authority using the received binding information, and transmits sales information for the selected product information to the mobile terminal in response to the purchase authority being valid, and the mobile terminal makes an offer to purchase the product to the server using the received sales information.
    Type: Grant
    Filed: April 6, 2008
    Date of Patent: August 19, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Hwan-joon Kim
  • Patent number: 8755520
    Abstract: An apparatus and method for generating a key for a broadcast encryption. The apparatus includes a node secret generator for managing a user that receives broadcast data in a tree structure and for generating a unique node secret for each node in the tree structure. The apparatus also includes an instant key generator for temporarily generating an instant key used at all nodes in common in the tree structure, and a node key generator for generating a node key for each node by operating the node secret generated at the node secret generator and the instant key generated at the instant key generator. Thus, key update can be efficiently achieved.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: June 17, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hwan-joon Kim, Dae-youb Kim, Weon-il Jin, Sung-joon Park
  • Patent number: 8615806
    Abstract: A code injection attack detecting apparatus and method are provided. The code injection attack may be detected based on characteristics occurring when a malicious code injected by the code injection attack is executed. For example, the code injection attack detecting apparatus and method may detect that a code injection attack occurs when a buffer miss is detected, a page corresponding to an address is updated, a mode of the page corresponding to the address is in user mode, and/or the page corresponding to the page is inserted by an external input.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: December 24, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Weon Il Jin, Hwan Joon Kim, Eun Ah Kim, Gyungho Lee
  • Patent number: 8578154
    Abstract: A tag generation method for generating tags used in data packets in a broadcast encryption system is provided. The method includes detecting at least one revoked leaf node; setting a node identification (node ID) assigned to at least one node among nodes assigned node IDs at a layer 0 and to which the at least one revoked leaf node is subordinate, to a node path identification (NPID) of the at least one revoked leaf node at the layer 0; generating a tag list in the layer 0 by combining the NPID of each of the at least one revoked leaf nodes at the layer 0 in order of increment of node IDs of the corresponding at least one revoked leaf nodes; and generating a tag list in a lowest layer by repeatedly performing the setting and generation operation down to the lowest layer.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: November 5, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Weon-il Jin, Maeng-hee Sung, Dae-youb Kim, Hwan-joon Kim
  • Patent number: 8566958
    Abstract: A method for authorizing an off-line image device to play contents in use of a recording medium, including recording an encrypted key on a recording medium; recording contents on the recording medium using the encrypted key; and recording information as to a play right to play the contents recorded on the recording medium. Thus, the off-line image device can be authorized to play contents in use of the recording medium. As a result, the off-line image device can play contents that are recorded on the recording medium and must be authorized to play the contents.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: October 22, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hwan-joon Kim, Dae-youb Kim, Maeng-hee Sung, Weon-il Jin
  • Patent number: RE45191
    Abstract: A user key management method for a broadcast encryption includes assigning node path identifiers (IDs) to nodes arranged in sequence; assigning random seed value keys to the nodes according to the node path IDs; generating key values by repeatedly applying a hash function to the assigned random seed value keys; and assigning the generated key values to the nodes in sequence. Accordingly, it is possible to reduce the transmission overhead that is most important matter in the broadcast encryption to less than the number of the revoked users. Further, there is an advantage that the transmission overhead of the exemplary embodiments of the present invention is remarkably reduced compared with the Subset Difference method.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: October 14, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Weon-il Jin, Dae-youb Kim, Hwan-joon Kim, Sung-joon Park, Jung-hee Cheon, Myung-hwan Kim, Nam-su Jho, Eun-sun Yoo
  • Patent number: RE45213
    Abstract: A user key management method for a broadcast encryption includes assigning node path identifiers (IDs) to nodes arranged in sequence; assigning random seed value keys to the nodes according to the node path IDs; generating key values by repeatedly applying a hash function to the assigned random seed value keys; and assigning the generated key values to the nodes in sequence. Accordingly, it is possible to reduce the transmission overhead that is most important matter in the broadcast encryption to less than the number of the revoked users. Further, there is an advantage that the transmission overhead of the exemplary embodiments of the present invention is remarkably reduced compared with the Subset Difference method.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: October 28, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Weon-il Jin, Dae-youb Kim, Hwan-joon Kim, Sung-joon Park, Jung-hee Cheon, Myung-hwan Kim, Nam-su Jho, Eun-sun Yoo