Patents by Inventor Kwang-Hyun Won
Kwang-Hyun Won 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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Patent number: 10123047Abstract: Disclosed are a method and an apparatus for image encoding/decoding. The method for image decoding includes comparing whether a size of a current transform block and a size of a smallest transform block (smallest transform unit (STU)) are the same as each other, and decoding information indicating whether transformation is performed on the current transform block and determining whether to perform inverse transformation on the current transform block based on the decoded information indicating whether the transformation is performed when the size of the current transform block and the size of a smallest transform block are the same as each other.Type: GrantFiled: February 2, 2018Date of Patent: November 6, 2018Assignee: Research & Business Foundation Sungkyunkwan UniversityInventors: Byeung Woo Jeon, Kwang Hyun Won
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Publication number: 20180295383Abstract: Disclosed herein are a method and apparatus for filtering a reference pixel. A method of smoothing a reference pixel may include determining whether or not to perform smoothing on a reference pixel based on the size of a transform block and information about an intra-prediction mode for the transform block and determining a smoothing method by comparing the size of the transform block with the size of a maximum transform block. Accordingly, image coding efficiency can be increased, and picture quality can be improved.Type: ApplicationFiled: June 11, 2018Publication date: October 11, 2018Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITYInventors: Byeung Woo JEON, Ho Young LEE, Kwang Hyun WON
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Publication number: 20180220159Abstract: coefficient blocks in which the sign is assigned to the non-zero transform coefficients according to the generated plurality of groups of code candidates; a cost calculation unit for calculating a cost on the basis of a pixel value difference between pixel values of a plurality of pixels selected from among the generated candidate reconstruction blocks and pixel values of other pixels adjacent to the selected plurality of pixels; and a decoding unit for allocating predetermined different codewords to each of the plurality of code candidates based on the calculated cost, and determining a code of the non-zero transform coefficients of the selected plurality of pixels according to a candidate group to which a codeword corresponding to the parsed codeword is allocated. An encoding apparatus encoding a bitstream including an image frame is disclosed.Type: ApplicationFiled: August 1, 2016Publication date: August 2, 2018Applicant: Samsung Electronics Co., Ltd.Inventors: Kwang-hyun WON, Chan-yul KIM, Sun-il LEE
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Patent number: 10027933Abstract: A method and an apparatus for outputting an image by using a color filter array (CFA) sensor are provided. The method includes receiving a 4-channel combination image signal through the CFA sensor, and separating the 4-channel combination image signal into a visible image signal and a near-infrared image signal, based on a signal separation coefficient including a color coefficient that is determined to convert 4-channel color data into 3-channel color data and a weight coefficient that is determined based on a 4-channel signal configured of near-infrared image signals. The method further includes outputting the visible image signal and the near-infrared image signal.Type: GrantFiled: July 7, 2016Date of Patent: July 17, 2018Assignees: SAMSUNG ELECTRONICS CO., LTD., RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITYInventors: Kwang-hyun Won, Chan-yul Kim, Byeung-Woo Jeon, Khanh Quoc Dinh, Young-hyeon Park, Hiuk-jae Shim, Sun-il Lee
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Patent number: 10021422Abstract: Disclosed are a method and an apparatus for image encoding/decoding. The method for image decoding includes comparing whether a size of a current transform block and a size of a smallest transform block (smallest transform unit (STU)) are the same as each other, and decoding information indicating whether transformation is performed on the current transform block and determining whether to perform inverse transformation on the current transform block based on the decoded information indicating whether the transformation is performed when the size of the current transform block and the size of a smallest transform block are the same as each other.Type: GrantFiled: January 7, 2016Date of Patent: July 10, 2018Assignee: Research & Busines Foundation Sungkyunkwan UniversityInventors: Byeung Woo Jeon, Kwang Hyun Won
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Patent number: 9998759Abstract: Disclosed herein are a method and apparatus for filtering a reference pixel. A method of smoothing a reference pixel may include determining whether or not to perform smoothing on a reference pixel based on the size of a transform block and information about an intra-prediction mode for the transform block and determining a smoothing method by comparing the size of the transform block with the size of a maximum transform block. Accordingly, image coding efficiency can be increased, and picture quality can be improved.Type: GrantFiled: April 3, 2017Date of Patent: June 12, 2018Assignee: Research & Business Foundation Sungkyunkwan UniversityInventors: Byeung Woo Jeon, Ho Young Lee, Kwang Hyun Won
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Publication number: 20180160146Abstract: Disclosed are a method and an apparatus for image encoding/decoding. The method for image decoding includes comparing whether a size of a current transform block and a size of a smallest transform block (smallest transform unit (STU)) are the same as each other, and decoding information indicating whether transformation is performed on the current transform block and determining whether to perform inverse transformation on the current transform block based on the decoded information indicating whether the transformation is performed when the size of the current transform block and the size of a smallest transform block are the same as each other.Type: ApplicationFiled: February 2, 2018Publication date: June 7, 2018Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITYInventors: Byeung Woo Jeon, Kwang Hyun Won
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Publication number: 20180160145Abstract: Disclosed are a method and an apparatus for image encoding/decoding. The method for image decoding includes comparing whether a size of a current transform block and a size of a smallest transform block (smallest transform unit (STU)) are the same as each other, and decoding information indicating whether transformation is performed on the current transform block and determining whether to perform inverse transformation on the current transform block based on the decoded information indicating whether the transformation is performed when the size of the current transform block and the size of a smallest transform block are the same as each other.Type: ApplicationFiled: February 2, 2018Publication date: June 7, 2018Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVER SITYInventors: Byeung Woo JEON, Kwang Hyun WON
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Publication number: 20180160147Abstract: Disclosed are a method and an apparatus for image encoding/decoding. The method for image decoding includes comparing whether a size of a current transform block and a size of a smallest transform block (smallest transform unit (STU)) are the same as each other, and decoding information indicating whether transformation is performed on the current transform block and determining whether to perform inverse transformation on the current transform block based on the decoded information indicating whether the transformation is performed when the size of the current transform block and the size of a smallest transform block are the same as each other.Type: ApplicationFiled: February 2, 2018Publication date: June 7, 2018Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITYInventors: Byeung Woo JEON, Kwang Hyun WON
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Publication number: 20180160148Abstract: Disclosed are a method and an apparatus for image encoding/decoding. The method for image decoding includes comparing whether a size of a current transform block and a size of a smallest transform block (smallest transform unit (STU)) are the same as each other, and decoding information indicating whether transformation is performed on the current transform block and determining whether to perform inverse transformation on the current transform block based on the decoded information indicating whether the transformation is performed when the size of the current transform block and the size of a smallest transform block are the same as each other.Type: ApplicationFiled: February 2, 2018Publication date: June 7, 2018Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITYInventors: Byeung Woo JEON, Kwang Hyun WON
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Publication number: 20170208343Abstract: Disclosed herein are a method and apparatus for filtering a reference pixel. A method of smoothing a reference pixel may include determining whether or not to perform smoothing on a reference pixel based on the size of a transform block and information about an intra-prediction mode for the transform block and determining a smoothing method by comparing the size of the transform block with the size of a maximum transform block. Accordingly, image coding efficiency can be increased, and picture quality can be improved.Type: ApplicationFiled: April 3, 2017Publication date: July 20, 2017Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITYInventors: Byeung Woo JEON, Ho Young LEE, Kwang Hyun WON
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Publication number: 20170180683Abstract: A method and an apparatus for outputting an image by using a color filter array (CFA) sensor are provided. The method includes receiving a 4-channel combination image signal through the CFA sensor, and separating the 4-channel combination image signal into a visible image signal and a near-infrared image signal, based on a signal separation coefficient including a color coefficient that is determined to convert 4-channel color data into 3-channel color data and a weight coefficient that is determined based on a 4-channel signal configured of near-infrared image signals. The method further includes outputting the visible image signal and the near-infrared image signal.Type: ApplicationFiled: July 7, 2016Publication date: June 22, 2017Applicants: SAMSUNG ELECTRONICS CO., LTD., Research & Business Foundation Sungkyunkwan UniversityInventors: Kwang-hyun WON, Chan-yul KIM, Byeung-Woo JEON, Khanh Quoc DINH, Young-hyeon PARK, Hiuk-jae SHIM, Sun-il LEE
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Patent number: 9615086Abstract: Disclosed herein are a method and apparatus for filtering a reference pixel. A method of smoothing a reference pixel may include determining whether or not to perform smoothing on a reference pixel based on the size of a transform block and information about an intra-prediction mode for the transform block and determining a smoothing method by comparing the size of the transform block with the size of a maximum transform block. Accordingly, image coding efficiency can be increased, and picture quality can be improved.Type: GrantFiled: February 6, 2014Date of Patent: April 4, 2017Assignee: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITYInventors: Byeung Woo Jeon, Ho Young Lee, Kwang Hyun Won
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Publication number: 20160269730Abstract: The present invention relates to a method which can selectively skip a transform to alleviate problems of deterioration in compression rate and image quality which are mainly generated when applying the motion compensation-transform encoding image compression technique which is mainly used currently, to an image having a drastic spatial change in a pixel value such as a computer image, and can skip the transform by comparing a transform size of a current block and the size of a maximum transform skip block with each other, and provides an efficient signaling technique therefor. The method includes the steps of: comparing the size of a current transform unit (TU) with the size of a maximum transform skip block when determining whether to transform a residual signal corresponding to difference between the current block and a prediction block; and determining whether to perform the transform on the basis of the comparison information on the size of the TU and the size of the maximum transform skip block.Type: ApplicationFiled: July 23, 2014Publication date: September 15, 2016Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITYInventors: Byeung Woo JEON, Kwang Hyun WON, Seung Ha YANG
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Publication number: 20160119645Abstract: Disclosed are a method and an apparatus for image encoding/decoding. The method for image decoding includes comparing whether a size of a current transform block and a size of a smallest transform block (smallest transform unit (STU)) are the same as each other, and decoding information indicating whether transformation is performed on the current transform block and determining whether to perform inverse transformation on the current transform block based on the decoded information indicating whether the transformation is performed when the size of the current transform block and the size of a smallest transform block are the same as each other.Type: ApplicationFiled: January 7, 2016Publication date: April 28, 2016Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITYInventors: Byeung Woo JEON, Kwang Hyun WON
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Patent number: 9247255Abstract: Disclosed are a method and an apparatus for image encoding/decoding. The method for image decoding includes comparing whether a size of a current transform block and a size of a smallest transform block (smallest transform unit (STU)) are the same as each other, and decoding information indicating whether transformation is performed on the current transform block and determining whether to perform inverse transformation on the current transform block based on the decoded information indicating whether the transformation is performed when the size of the current transform block and the size of a smallest transform block are the same as each other.Type: GrantFiled: February 27, 2014Date of Patent: January 26, 2016Assignee: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITYInventors: Byeung Woo Jeon, Kwang Hyun Won
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Publication number: 20140241641Abstract: Disclosed are a method and an apparatus for image encoding/decoding. The method for image decoding includes comparing whether a size of a current transform block and a size of a smallest transform block (smallest transform unit (STU)) are the same as each other, and decoding information indicating whether transformation is performed on the current transform block and determining whether to perform inverse transformation on the current transform block based on the decoded information indicating whether the transformation is performed when the size of the current transform block and the size of a smallest transform block are the same as each other.Type: ApplicationFiled: February 27, 2014Publication date: August 28, 2014Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITYInventors: Byeung Woo JEON, Kwang Hyun WON
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Patent number: 8804828Abstract: Disclosed is a method of encoding a direct mode when coding moving images, the method includes finding a prediction and a cost for each of a plurality of direct modes including a backward-based temporal direct mode and a forward-based temporal direct mode with respect to a current block to be encoded and determining one mode having the lowest cost as a result of comparing the costs as an optimal encoding mode, thereby performing encoding the direct mode.Type: GrantFiled: February 20, 2009Date of Patent: August 12, 2014Assignees: Samsung Electronics Co., Ltd, Sungkyunkwan University Foundation for Corporate CollaborationInventors: Kwang-Pyo Choi, Yun-Je Oh, Young-Hun Joo, Byeung-Woo Jeon, Bong-Soo Jung, Kwang-Hyun Won
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Publication number: 20140219336Abstract: Disclosed herein are a method and apparatus for filtering a reference pixel. A method of smoothing a reference pixel may include determining whether or not to perform smoothing on a reference pixel based on the size of a transform block and information about an intra-prediction mode for the transform block and determining a smoothing method by comparing the size of the transform block with the size of a maximum transform block. Accordingly, image coding efficiency can be increased, and picture quality can be improved.Type: ApplicationFiled: February 6, 2014Publication date: August 7, 2014Applicant: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITYInventors: Byeung Woo JEON, Ho Young LEE, Kwang Hyun WON
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Patent number: 8526499Abstract: A bi-prediction decoding method includes determining whether or not a current block to be decoded is a bi-prediction coding mode by analyzing the coded data; recovering a decoding target motion vector by decoding the coded data in a case where it is determined that the current block is the bi-prediction coding mode; calculating the recovered decoding target motion vector, and a non-decoding target motion vector corresponding to a second reference picture based on a temporal distance between a current picture to which the current block belongs and a first decoding reference picture corresponding to the decoding target motion vector and a temporal distance between the current picture and a second decoding reference picture; and recovering the current block based on a generated prediction block by generating the prediction block for the current block based on the recovered decoding target motion vector and the calculated non-decoding target motion vector.Type: GrantFiled: February 19, 2008Date of Patent: September 3, 2013Assignee: Sungkyunkwan University Foundation for Corporate CollaborationInventors: Byeung Woo Jeon, Bong Soo Jung, Kwang Hyun Won