Patents by Inventor Sang-Kwon Na

Sang-Kwon Na 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: 20190222840
    Abstract: A video encoding apparatus comprises an encoder encoding input video; a decoder decoding video data, and a filter to compensate for a pixel value of the encoded video data. An adaptive loop filter (ALF) parameter predictor generates an ALF filter parameter using the decoded video data. The ALF filter parameter is applied to an ALF filter to compensate a current pixel by using a pixel adjacent to the current pixel and a filter coefficient with respect to the neighboring pixel; a sample adaptive offset (SAO) filter unit applied to the decoded video data compensates for a current pixel by using at least one of an edge offset and a band offset; an ALF filter unit applies the ALF filter parameter, the ALF filter to video data to which the SAO filter has been applied; and an entropy encoder performs entropy encoding on the ALF filter parameter.
    Type: Application
    Filed: March 25, 2019
    Publication date: July 18, 2019
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung-dae KIM, Ki-won YOO, Jae-moon Kim, Sang-kwon Na
  • Patent number: 10321155
    Abstract: Provided is a video encoding method including: performing padding outside an input image such that a size of the input image is a multiple of a maximum coding unit; when a current maximum coding unit includes a padding area generated via the padding, determining a coding unit by splitting the current maximum coding unit by using a boundary of the input image and the padding area; determining information indicating whether a coding unit included in the padding area includes a nonzero coefficient to be 0; and encoding a bitstream including the determined information.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: June 11, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ki-won Yoo, Jae-moon Kim, Sang-kwon Na
  • Publication number: 20190158926
    Abstract: A device may receive a request associated with adjusting the media output level of a sink device that is configured to output media content. The device may identify a source gain of a source device that is configured to provide the media content to the sink device, and a sink gain of the sink device. The device may identify a sink adjustment value for changing the sink gain based on the request for adjusting the media output level of the sink device, the source gain, and the sink gain. The device may transmit, to the sink device, a control signal to permit the sink gain to be changed based on the sink adjustment value. The media output level of the sink device is based on the source gain and the sink gain.
    Type: Application
    Filed: November 20, 2018
    Publication date: May 23, 2019
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Woo Seok KANG, Doo Hyun KIM, Sang Kwon NA, Ki Won YOO, Chul Woo LEE, Jin Joo CHUNG, Doo Chan HWANG
  • Patent number: 10291915
    Abstract: A video encoding method includes: receiving an image; up-sampling the received image; and changing a sample value of an up-sampling region included in the up-sampled image and encoding the up-sampled image by using the changed sample value, wherein the up-sampling region is a region inserted into the received image by the up-sampling.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: May 14, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jae-moon Kim, Ki-won Yoo, Chang-su Han, Sang-kwon Na, Hyung-ju Chun
  • Patent number: 10277917
    Abstract: An image encoding method includes generating symbols by performing transformation and quantization according to a transformation block, on a block that performs prediction according to a prediction mode; updating a probability index of a current sub block by using a probability index of a previous sub block among sub blocks included in the transformation block; determining a rate according to a bit length of the current sub block by using the probably index; determining a rate of the transformation block by using rates of the sub blocks; determining a distortion by using a difference between an original image and a reconstruction image according to transformation and quantization; and determining a rate-distortion (R-D) cost by using the distortion and the rate.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: April 30, 2019
    Assignees: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
    Inventors: Sang-kwon Na, Soo-ik Chae, Ki-won Yoo, Soon-woo Choi, Woo-seok Jeong
  • Patent number: 10250879
    Abstract: A video encoding apparatus comprises an encoder encoding input video; a decoder decoding video data, and a filter to compensate for a pixel value of the encoded video data. An adaptive loop filter (ALF) parameter predictor generates an ALF filter parameter using the decoded video data. The ALF filter parameter is applied to an ALF filter to compensate a current pixel by using a pixel adjacent to the current pixel and a filter coefficient with respect to the neighboring pixel; a sample adaptive offset (SAO) filter unit applied to the decoded video data compensates for a current pixel by using at least one of an edge offset and a band offset; an ALF filter unit applies the ALF filter parameter, the ALF filter to video data to which the SAO filter has been applied; and an entropy encoder performs entropy encoding on the ALF filter parameter.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: April 2, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung-dae Kim, Ki-won Yoo, Jae-moon Kim, Sang-kwon Na
  • Patent number: 10244247
    Abstract: Provided are a method and an apparatus for decoding an image by accessing a memory by a block group. The method comprises checking information regarding a size of one or more blocks included in a bitstream of an encoded image, determining whether to group one or more blocks for performing decoding, based on the information regarding the size of the one or more blocks, setting a block group including one or more blocks based on the information regarding the size of the one or more blocks, and accessing a memory by the block group to perform a parallel-pipeline decoding process by the block group.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: March 26, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chan-sik Park, Myung-ho Kim, Sang-kwon Na, Ki-won Yoo, Chang-su Han
  • Patent number: 10154263
    Abstract: Provided is a video encoding method including: calculating a difference value between a rate-distortion (R-D) cost of a first coefficient level from among coefficient levels of a sub-block and an R-D cost of a second coefficient level adjacent to the first coefficient level by using a distortion difference calculated by using an integer of the first coefficient level and an integer of the second coefficient level and a rate variation between the first coefficient level and the second coefficient level; selecting one of the integer values of the first and second coefficient levels as a modified value of the first coefficient level based on the difference value; and outputting the modified value of the first coefficient level.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: December 11, 2018
    Assignees: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
    Inventors: Sang-kwon Na, Soo-ik Chae, Ki-won Yoo, Soon-woo Choi, Wook-seok Jeong
  • Publication number: 20180306435
    Abstract: A combustor includes a combustion chamber having a grate provided therein and a combustion space formed above the grate; a fuel supply part downwardly connected to a center part of the grate so as to supply fuel to an upper part of the grate; an air supply part connected to a side part of the combustion chamber so as to be slanted on a horizontal plane, thereby supplying combustion air; a guide member disposed to protrude toward the inside of the combustion space from an inlet through which the combustion air flows into the combustion space, and opened downwardly so as to guide the combustion air; and protruding guide lines having a screw line shape and extending to be slanted downwardly on at least one of the respective surfaces, which face each other, of the guide member and the inner wall of the combustion chamber.
    Type: Application
    Filed: July 30, 2015
    Publication date: October 25, 2018
    Inventors: Sang-Kwon NA, Young-Bong YOO, Young-June CHOI
  • Publication number: 20180163961
    Abstract: A combustor includes a combustion chamber including a grate and a combustion space formed above the grate; a fuel supply portion downwardly connected to a central portion of the grate to supply fuel to an upper portion of the grate; an air supply part connected to a side portion of the combustion chamber to be inclined on a horizontal plane, such that the combustion air rotates in the combustion space; a clinker collection portion downwardly communicating with a gap formed between an inner wall of the combustion chamber and the grate, to collect clinker generated by combustion of fuel in the clinker collection portion; and a reintroduction channel passing through the grate, such that the combustion air is reintroduced into the combustion space.
    Type: Application
    Filed: July 30, 2015
    Publication date: June 14, 2018
    Inventors: Sang-Kwon NA, Young-Bong YOO, Young-June CHOI
  • Publication number: 20180124412
    Abstract: A processing apparatus has a processor including a first memory. The processor divides a frame in video content into a plurality of coding units (CUs), and encodes the plurality of CUs in a diagonal direction to generate an encoded frame, wherein when a first CU is encoded based on a first encoding type, the processor is further configured to load, from a second memory, a first partial region of a reference frame corresponding to first position information of the first CU to the first memory and encode the first CU based on the first partial region of the reference frame loaded from the second memory, and wherein, when the first CU is encoded based on a second encoding type, the processor is further configured to encode the first CU based on a first reference pixel value corresponding to the first position information of the first CU from the first memory.
    Type: Application
    Filed: September 27, 2017
    Publication date: May 3, 2018
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang-kwon NA, Ki-won YOO, Doo-hyun KIM
  • Publication number: 20180109702
    Abstract: An image processing apparatus is provided. The image processing apparatus includes a signal processor and a controller. The signal processor processes an image signal including a plurality of color components. The controller controls the signal processor to perform a color gamut conversion, a domain transform, a quantization processing and an encoding processing with respect to an input image signal, and in response to differences between the color components of the image signal being less than a first critical level, to not perform the color gamut conversion.
    Type: Application
    Filed: August 25, 2017
    Publication date: April 19, 2018
    Inventors: Sang-kwon NA, Doo-hyun KIM, Ki-won YOO
  • Patent number: 9936223
    Abstract: Provided are a method and a device for encoding a video to improve an intra prediction processing speed, and a method and a device for decoding the video. The method for encoding a video performs parallel intra prediction and includes: obtaining, by using pixels of peripheral blocks processed prior to a plurality of adjacent blocks, reference pixels used for intra prediction of each of the plurality of adjacent blocks; performing, by using the obtained reference pixels, intra prediction in parallel for each of the plurality of adjacent blocks; and adding reference pixel syntax information to a bitstream.
    Type: Grant
    Filed: July 21, 2014
    Date of Patent: April 3, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang-kwon Na, Ki-won Yoo, Jae-Hyun Kim, Kyo-hyuk Lee
  • Publication number: 20170310976
    Abstract: Provided is a video decoding method for reconstructing an image, the video decoding method including: obtaining reference image data from a bitstream; determining an attribute of the reference image data as a long-term reference attribute or a short-term reference attribute, according to a frequency of referring to the reference image data by image data to be decoded; storing the reference image data in a memory by using the attribute of the reference image data; and decoding an image by using the reference image data stored in the memory.
    Type: Application
    Filed: September 23, 2015
    Publication date: October 26, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang-kwon NA, Sung-oh KIM, Jae-moon KIM, Ki-won YOO
  • Publication number: 20170223352
    Abstract: A video encoding apparatus comprises an encoder encoding input video; a decoder decoding video data, and a filter to compensate for a pixel value of the encoded video data. An adaptive loop filter (ALF) parameter predictor generates an ALF filter parameter using the decoded video data. The ALF filter parameter is applied to an ALF filter to compensate a current pixel by using a pixel adjacent to the current pixel and a filter coefficient with respect to the neighboring pixel; a sample adaptive offset (SAO) filter unit applied to the decoded video data compensates for a current pixel by using at least one of an edge offset and a band offset; an ALF filter unit applies the ALF filter parameter, the ALF filter to video data to which the SAO filter has been applied; and an entropy encoder performs entropy encoding on the ALF filter parameter.
    Type: Application
    Filed: June 29, 2015
    Publication date: August 3, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung-dae KIM, Ki-won YOO, Jae-moon KIM, Sang-kwon NA
  • Publication number: 20170155922
    Abstract: Provided is a video encoding method including: performing padding outside an input image such that a size of the input image is a multiple of a maximum coding unit; when a current maximum coding unit includes a padding area generated via the padding, determining a coding unit by splitting the current maximum coding unit by using a boundary of the input image and the padding area; determining information indicating whether a coding unit included in the padding area includes a nonzero coefficient to be 0; and encoding a bitstream including the determined information.
    Type: Application
    Filed: June 26, 2015
    Publication date: June 1, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ki-won YOO, Jae-moon KIM, Sang-kwon NA
  • Publication number: 20170150165
    Abstract: A decoding apparatus and a decoding method thereof are provided. The decoding apparatus includes a memory configured to store a reference image frame of a first definition that is decoded from a bit stream. The decoding apparatus further includes a decoder configured to determine, form the bit stream, a motion vector of a current block of a current image frame of a second definition, correct a size of the motion vector and a location of the current block based on a scaling factor, load, from the memory, a reference block that is the corrected motion vector away from the corrected location of the current block in the reference image frame, and decode the current image frame based on the reference block.
    Type: Application
    Filed: April 27, 2016
    Publication date: May 25, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang-kwon NA, Myung-ho KIM, Chan-sik PARK, Ki-won YOO, Chang-su HAN
  • Publication number: 20170134740
    Abstract: Provided are a method and an apparatus for decoding an image by accessing a memory by a block group. The method comprises checking information regarding a size of one or more blocks included in a bitstream of an encoded image, determining whether to group one or more blocks for performing decoding, based on the information regarding the size of the one or more blocks, setting a block group including one or more blocks based on the information regarding the size of the one or more blocks, and accessing a memory by the block group to perform a parallel-pipeline decoding process by the block group.
    Type: Application
    Filed: August 30, 2016
    Publication date: May 11, 2017
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chan-sik PARK, Myung-ho KIM, Sang-kwon NA, Ki-won YOO, Chang-su HAN
  • Patent number: 9591307
    Abstract: Provided are a method and an apparatus for determining an intra prediction mode. The method includes: splitting a maximum coding unit into coding units of a first size; acquiring an edge direction of each of the coding units of the first size; grouping adjacent coding units of the first size based on uniformity of edge directions of the adjacent coding units of the first size; determining a size range of coding units to be applied to intra prediction on the intra prediction coding unit group; performing the intra prediction on the intra prediction coding unit group by using coding units having sizes included in the determined size range; and determining a coding unit for the intra prediction and an intra prediction mode of the coding unit by comparing costs according to the performed intra prediction on the coding units having the sizes included in the size range.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: March 7, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang-kwon Na, Ki-won Yoo
  • Publication number: 20170064335
    Abstract: Provided is a method of encoding an image, the method including determining a scanning sequence for transforming one or more sub-blocks included in a transformation block to be identical to a sequence of quantizing the one or more sub-blocks; determining a sub-block for transformation from among the one or more sub-blocks according to the determined scanning sequence; and performing transformation by applying one or more transformation matrixes with respect to the sub-block for transformation.
    Type: Application
    Filed: June 16, 2016
    Publication date: March 2, 2017
    Applicants: SAMSUNG ELECTRONICS CO., LTD., Seoul National University R&DB Foundation
    Inventors: Sang-kwon NA, Soo-ik CHAE, Ki-won YOO, Soon-woo CHOI, Wook-seok JEONG