Patents by Inventor Hae Chul Choi
Hae Chul 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: 20190297331Abstract: The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.Type: ApplicationFiled: June 12, 2019Publication date: September 26, 2019Applicants: Electronics and Telecommunications Research Institute, Kwangwoon University Research Institute for Industry Cooperation, Industry-Academia Cooperation Group of Sejong UniversityInventors: Se-Yoon JEONG, Hae-Chul CHOI, Jeong-Il SEO, Seung-Kwon BEACK, In-Seon JANG, Jae-Gon KIM, Kyung-Ae MOON, Dae-Young JANG, Jin-Woo HONG, Jin-Woong KIM, Yung-Lyul LEE, Dong-Gyu SIM, Seoung-Jun OH, Chang-Beom AHN, Dae-Yeon KIM, Dong-Kyun KIM
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Patent number: 10419752Abstract: Provided are an image encoding method and device. When carrying out image encoding for a block within a slice, at least one block in a restored block of the slice is set as a reference block. When this is done, the encoding parameters of the reference block are distinguished, and the block to be encoded is encoded adaptively based on the encoding parameters.Type: GrantFiled: December 16, 2010Date of Patent: September 17, 2019Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Sung Chang Lim, Jong Ho Kim, Hae Chul Choi, Hui Yong Kim, Ha Hyun Lee, Jin Ho Lee, Se Yoon Jeong, Suk Hee Cho, Jin Soo Choi, Jin Woo Hong, Jin Woong Kim
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Publication number: 20190281305Abstract: The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit.Type: ApplicationFiled: April 18, 2019Publication date: September 12, 2019Inventors: Hae Chul CHOI, Se Yoon JEONG, Sung-Chang LIM, Jin Soo CHOI, Jin Woo HONG, Dong Gyu SIM, Seoung-Jun OH, Chang-Beom AHN, Gwang Hoon PARK, Seung Ryong KOOK, Sea-Nae PARK, Kwang-Su JEONG
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Publication number: 20190261004Abstract: The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit.Type: ApplicationFiled: April 18, 2019Publication date: August 22, 2019Inventors: Hae Chul CHOI, Se Yoon JEONG, Sung-Chang LIM, Jin Soo CHOI, Jin Woo HONG, Dong Gyu SIM, Seoung-Jun OH, Chang-Beom AHN, Gwang Hoon PARK, Seung Ryong KOOK, Sea-Nae PARK, Kwang-Su JEONG
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Publication number: 20190238841Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus according to the present invention may comprise deriving an intra-prediction mode of a current block, and performing intra-prediction for the current block based on the intra-prediction mode. The deriving of the intra-prediction mode may comprise decoding a predetermined mode sameness indicator.Type: ApplicationFiled: October 24, 2017Publication date: August 1, 2019Applicants: Electronics and Telecommunications Research Institute, Industry-University Cooperation Foundation Korea Aerospace University, Hanbat National University Industry-Academic Cooperation FoundationInventors: Jin Ho LEE, Sung Chang LIM, Jung Won KANG, Hyun Suk KO, Ha Hyun LEE, Dong San JUN, Seung Hyun CHO, Hui Yong KIM, Jae Gon KIM, Do Hyeon PARK, Jin Soo CHOI, Hae Chul CHOI
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Patent number: 10321137Abstract: The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit.Type: GrantFiled: October 7, 2016Date of Patent: June 11, 2019Assignees: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATION, UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITYInventors: Hae Chul Choi, Se Yoon Jeong, Sung-Chang Lim, Jin Soo Choi, Jin Woo Hong, Dong Gyu Sim, Seoung-Jun Oh, Chang-Beom Ahn, Gwang Hoon Park, Seung Ryong Kook, Sea-Nae Park, Kwang-Su Jeong
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Publication number: 20190141347Abstract: Provided is an image encoding/decoding apparatus and method. The image encoding apparatus may include a motion vector prediction unit to perform a prediction with respect to an arbitrary motion vector of a current block within an image, using at least one of vector information of a motion vector corresponding to an adjacent block and vector information of a previous motion vector of the current block, and a differential determination unit to determine differential information of a motion vector of the current block based on the motion vector predicted in the motion vector prediction unit and an actual motion vector of the current block.Type: ApplicationFiled: December 31, 2018Publication date: May 9, 2019Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Hae-Chul CHOI, Se Yoon JEONG, Sukhee CHO, Hui Yong KIM, Jinho LEE, Hahyun LEE, Sung-Chang LIM, Jongho KIM, Jin Soo CHOI, Jin Woo HONG, Jin Woong KIM
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Patent number: 10212448Abstract: Provided is an image encoding/decoding apparatus and method. The image encoding apparatus may include a motion vector prediction unit to perform a prediction with respect to an arbitrary motion vector of a current block within an image, using at least one of vector information of a motion vector corresponding to an adjacent block and vector information of a previous motion vector of the current block, and a differential determination unit to determine differential information of a motion vector of the current block based on the motion vector predicted in the motion vector prediction unit and an actual motion vector of the current block.Type: GrantFiled: February 22, 2017Date of Patent: February 19, 2019Assignee: Electronics and Telecommunications Research InstituteInventors: Hae-Chul Choi, Se Yoon Jeong, Sukhee Cho, Hui Yong Kim, Jinho Lee, Hahyun Lee, Sung-Chang Lim, Jongho Kim, Jin Soo Choi, Jin Woo Hong, Jin Woong Kim
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Patent number: 10178393Abstract: The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit.Type: GrantFiled: October 7, 2016Date of Patent: January 8, 2019Assignees: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATION, UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITYInventors: Hae Chul Choi, Se Yoon Jeong, Sung-Chang Lim, Jin Soo Choi, Jin Woo Hong, Dong Gyu Sim, Seoung-Jun Oh, Chang-Beom Ahn, Gwang Hoon Park, Seung Ryong Kook, Sea-Nae Park, Kwang-Su Jeong
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Publication number: 20180234678Abstract: Provided are an image encoding method and device. When carrying out image encoding for a block within a slice, at least one block in a restored block of the slice is set as a reference block. When this is done, the encoding parameters of the reference block are distinguished, and the block to be encoded is encoded adaptively based on the encoding parameters.Type: ApplicationFiled: April 16, 2018Publication date: August 16, 2018Applicant: Electronics and Telecommunications Research InstituteInventors: Sung Chang LIM, Jong Ho KIM, Hae Chul CHOI, Hui Yong KIM, Ha Hyun LEE, Jin Ho LEE, Se Yoon JEONG, Suk Hee CHO, Jin Soo CHOI, Jin Woo HONG, Jin Woong KIM
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Publication number: 20180213227Abstract: Provided is a video encoding apparatus, including a signal separator to separate a differential image block into a first domain and a second domain, based on a boundary line included in the differential image block, the differential image block indicating a difference between an original image and a prediction image with respect to the original image, a transform encoder to perform a transform encoding with respect to the first domain using a discrete cosine transform (DCT), a quantization unit to quantize an output of the transform encoding unit in a frequency domain, a space domain quantization unit to quantize the second domain in a space domain, and an entropy encoder to perform an entropy encoding using outputs of the quantization unit and the space domain quantization unit.Type: ApplicationFiled: March 22, 2018Publication date: July 26, 2018Applicants: Electronics and Telecommunications Research Institute, Kwangwoon University Industry-Academic Collaboration Foundation, University-Industry Cooperation Group of Kyung Hee University, Korea Advanced Institute of Science and TechnologyInventors: Sung-Chang LIM, Ha Hyun LEE, Hui Yong KIM, Se Yoon JEONG, Suk Hee CHO, Hae Chul CHOI, Jong Ho KIM, Jin Ho LEE, Jin Soo CHOI, Jin Woo HONG, Dong Gyu SIM, Seoung Jun OH, Gwang Hoon PARK, Mun Churl KIM, Neung Joo HWANG, Sea Nae PARK
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Publication number: 20180199040Abstract: An intra prediction mode encoding and decoding method, an image decoding device, and an image encoding device operate by deriving most probable modes (MPMs) from surrounding prediction units adjacent to a current prediction unit and deriving an intra prediction mode of the current prediction unit on the basis of an MPM flag indicating whether an MPM having the same prediction mode as the intra prediction mode of the current prediction unit exists among the derived MPMs.Type: ApplicationFiled: March 6, 2018Publication date: July 12, 2018Applicants: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, INDUSTRY-UNIVERSITY COOPERATION FOUNDATION KOREA AEROSPACE UNIVERSITYInventors: Jin Ho LEE, Hui Yong KIM, Sung Chang LIM, Jin Soo CHOI, Jin woong KIM, Jae Gon KIM, Hae Chul CHOI, Sang Yong LEE
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Patent number: 9961344Abstract: Provided is a video encoding apparatus, including a signal separator to separate a differential image block into a first domain and a second domain, based on a boundary line included in the differential image block, the differential image block indicating a difference between an original image and a prediction image with respect to the original image, a transform encoder to perform a transform encoding with respect to the first domain using a discrete cosine transform (DCT), a quantization unit to quantize an output of the transform encoding unit in a frequency domain, a space domain quantization unit to quantize the second domain in a space domain, and an entropy encoder to perform an entropy encoding using outputs of the quantization unit and the space domain quantization unit.Type: GrantFiled: July 26, 2016Date of Patent: May 1, 2018Assignees: Electronics and Telecommunications Research Institute, Kwangwoon University Industry-Academic Collaboration Foundation, University-Industry Cooperation Group of Kyung Hee University, Korea Advanced Institute of Science and TechnologyInventors: Sung-Chang Lim, Ha Hyun Lee, Hui Yong Kim, Se Yoon Jeong, Suk Hee Cho, Hae Chul Choi, Jong Ho Kim, Jin Ho Lee, Jin Soo Choi, Jin Woo Hong, Dong Hyu Sim, Seoung Jun Oh, Gwang Hoon Park, Mun Churl Kim, Neung Joo Hwang, Sea Nae Park
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Patent number: 9955169Abstract: An intra prediction mode encoding and decoding method, an image decoding device, and an image encoding device operate by deriving most probable modes (MPMs) from surrounding prediction units adjacent to a current prediction unit and deriving an intra prediction mode of the current prediction unit on the basis of an MPM flag indicating whether an MPM having the same prediction mode as the intra prediction mode of the current prediction unit exists among the derived MPMs.Type: GrantFiled: January 30, 2013Date of Patent: April 24, 2018Assignees: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, INDUSTRY UNIVERSITY COOPERATION FOUNDATION KOREA AEROSPACE UNIVERSITYInventors: Jin Ho Lee, Hui Yong Kim, Sung Chang Lim, Jin Soo Choi, Jin woong Kim, Jae Gon Kim, Hae Chul Choi, Sang Yong Lee
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Patent number: 9942554Abstract: The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit.Type: GrantFiled: June 24, 2016Date of Patent: April 10, 2018Assignees: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATION, UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITYInventors: Hae Chul Choi, Se Yoon Jeong, Sung-Chang Lim, Jin Soo Choi, Jin Woo Hong, Dong Gyu Sim, Seoung-Jun Oh, Chang-Beom Ahn, Gwang Hoon Park, Seung Ryong Kook, Sea-Nae Park, Kwang-Su Jeong
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Publication number: 20180041763Abstract: The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.Type: ApplicationFiled: October 16, 2017Publication date: February 8, 2018Applicants: Electronics and Telecommunications Research Institute, Kwangwoon University Research Institute for Industry Cooperation, Industry-Academia Cooperation Group of Sejong UniversityInventors: Se-Yoon JEONG, Hae-Chul CHOI, Jeong-Il SEO, Seung-Kwon BEACK, In-Seon JANG, Jae-Gon KIM, Kyung-Ae MOON, Dae-Young JANG, Jin-Woo HONG, Jin-Woong KIM, Yung-Lyul LEE, Dong-Gyu SIM, Seoung-Jun OH, Chang-Beom AHN, Dae-Yeon KIM, Dong-Kyun KIM
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Publication number: 20180014026Abstract: Provided are an encoding device using predictive coding in a screen and a method thereof, and a decoding device and a method thereof. The encoding device is capable of generating a prediction block of a current block according to one of methods for generating a plurality of predetermined prediction blocks, and outputting at least one of encoding information and differential blocks as bitstream by entropy encoding according to whether differential blocks are encoded or not.Type: ApplicationFiled: September 22, 2017Publication date: January 11, 2018Applicants: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTIT UTE, UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITYInventors: Sung Chang LIM, Hae Chul CHOI, Se Yoon JEONG, Suk Hee CHO, Hui Yong KIM, Jin Ho LEE, Ha Hyun LEE, Jong Ho KIM, Jin Soo CHOI, Jin Woong KIM, Gwang Hoon PARK, Kyung Yong KIM, Dong Gyu SIM, Seoung Jun OH
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Patent number: 9819942Abstract: The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.Type: GrantFiled: August 11, 2015Date of Patent: November 14, 2017Assignees: Electronics and Telecommunications Research Institute, Kwangwoon University Research Institute For Industry Cooperation, Industry-Academic Cooperation Group of Sejong UniversityInventors: Se-Yoon Jeong, Hae-Chul Choi, Jeong-Il Seo, Seung-Kwon Beack, In-Seon Jang, Jae-Gon Kim, Kyung-Ae Moon, Dae-Young Jang, Jin-Woo Hong, Jin-Woong Kim, Yung-Lyul Lee, Dong-Gyu Sim, Seoung-Jun Oh, Chang-Beom Ahn, Dae-Yeon Kim, Dong-Kyun Kim
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Patent number: 9794556Abstract: Provided are an encoding device using predictive coding in a screen and a method thereof, and a decoding device and a method thereof. The encoding device is capable of generating a prediction block of a current block according to one of methods for generating a plurality of predetermined prediction blocks, and outputting at least one of encoding information and differential blocks as bitstream by entropy encoding according to whether differential blocks are encoded or not.Type: GrantFiled: November 29, 2011Date of Patent: October 17, 2017Assignees: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITYInventors: Sung Chang Lim, Hae Chul Choi, Se Yoon Jeong, Suk Hee Cho, Hui Yong Kim, Jin Ho Lee, Ha Hyun Lee, Jong Ho Kim, Jin Soo Choi, Jin Woong Kim, Gwang Hoon Park, Kyung Yong Kim, Dong-Gyu Sim, Seoung Jun Oh
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Patent number: 9736484Abstract: The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.Type: GrantFiled: August 11, 2015Date of Patent: August 15, 2017Assignees: Electronics and Telecommunications Research Institute, Kwangwoon University Research Institute For Industry Cooperation, Industry-Academia Cooperation Group of Sejong UniversityInventors: Se-Yoon Jeong, Hae-Chul Choi, Jeong-Il Seo, Seung-Kwon Beack, In-Seon Jang, Jae-Gon Kim, Kyung-Ae Moon, Dae-Young Jang, Jin-Woo Hong, Jin-Woong Kim, Yung-Lyul Lee, Dong-Gyu Sim, Seoung-Jun Oh, Chang-Beom Ahn, Dae-Yeon Kim, Dong-Kyun Kim