Patents by Inventor Kyuwoon Kim
Kyuwoon 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).
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Patent number: 10742988Abstract: The present invention provides a method of decoding a video signal using graph-based transform comprising the steps: extracting prediction unit partition information of a current coding unit from the video signal; obtaining a graph-based transform kernel from predetermined table information based on the prediction unit partition information; and performing an inverse-transform of a transform unit using the graph-based transform kernel, wherein the graph-based transform kernel corresponds to at least one of the prediction unit partition information and an edge weight, and the edge weight is a predetermined value representing a correlation between pixels.Type: GrantFiled: February 4, 2016Date of Patent: August 11, 2020Assignee: LG Electronics Inc.Inventors: Moonmo Koo, Jin Heo, Eunyong Son, Sehoon Yea, Seungwook Park, Kyuwoon Kim, Bumshik Lee
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Patent number: 10638132Abstract: The present invention provides a method for encoding a video signal comprising the steps of: performing block division with respect to a target unit of the video signal, wherein the block division is performed on the basis of square division and/or non-square division; determining the optimal block partition on the basis of a rate distortion cost, when the target unit is divided into a plurality of non-square blocks; and performing CNT prediction coding on the non-square blocks resulting from the optimal block partition, wherein the CNT prediction coding involves performing prediction using all previously decoded pixel values.Type: GrantFiled: October 17, 2016Date of Patent: April 28, 2020Assignee: LG ELECTRONICS INC.Inventors: Moonmo Koo, Bumshik Lee, Sehoon Yea, Kyuwoon Kim
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Patent number: 10602141Abstract: An inter prediction method according to the present invention, which is performed by a decoding apparatus, comprises the steps of: acquiring prediction-related information and residual information from a received bitstream; performing inter prediction on a current block on the basis of the prediction-related information so as to generate prediction samples; generating a list of Wiener filter candidates on the basis of spatially neighboring blocks of the current block, and deriving Wiener filter coefficients for the current block on the basis of candidate blocks in the list of the Wiener filter candidates; filtering the prediction samples on the basis of the derived Wiener filter coefficients; deriving residual samples for the current block on the basis of the residual information; and generating a reconstructed picture on the basis of the filtered prediction samples and the residual samples. The present invention can reduce the amount of data for a residual signal and improve coding efficiency.Type: GrantFiled: January 25, 2016Date of Patent: March 24, 2020Assignee: LG ELECTRONICS INC.Inventors: Kyuwoon Kim, Jaehyun Lim, Naeri Park, Jungdong Seo
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Patent number: 10587873Abstract: The present invention provides a method for processing a video signal, comprising generating a prediction block for a neighbor block using a reconstructed reference pixel of the neighbor block when the neighbor block adjacent to a current block is intra-coded; determining a refined intra prediction mode of the neighbor block based on the prediction block, where the refined intra prediction mode represents a mode which minimizes an error between the prediction block and a reconstructed neighbor block; generating a prediction mode candidate list for the current block based on the refined intra prediction mode; selecting an intra prediction mode for the current block from the prediction mode candidate list; and performing a prediction for the current block based on the intra prediction mode.Type: GrantFiled: October 13, 2016Date of Patent: March 10, 2020Assignee: LG Electronics Inc.Inventors: Moonmo Koo, Sehoon Yea, Kyuwoon Kim, Bumshik Lee
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Patent number: 10523945Abstract: The present invention provides a method for encoding a video signal comprising the steps of: obtaining activity information from the video signal, wherein the activity signal indicates information relating to edge characteristics of an image and includes edge orientation information and/or edge level information; determining conditionally non-linear transform (CNT) configuration information on the basis of the activity information; and performing CNT prediction coding on the basis of the CNT configuration information, wherein the CNT prediction coding involves performing prediction using all previously decoded pixel values.Type: GrantFiled: October 13, 2016Date of Patent: December 31, 2019Assignee: LG Electronics Inc.Inventors: Moonmo Koo, Sehoon Yea, Eunyong Son, Kyuwoon Kim, Jin Heo, Junghak Nam, Bumshik Lee
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Patent number: 10499061Abstract: The present invention provides a method for decoding a video signal by using a graph-based transform, comprising the steps of: parsing a transform index from the video signal; generating a line graph on the basis of edge information on a target unit; aligning transform vectors for each of segments of the line graph on the basis of a transform type corresponding to the transform index; acquiring a transform kernel by realigning the transform vectors for each of segments of the line graph according to a predetermined condition; and performing an inverse transform for the target unit on the basis of the transform kernel.Type: GrantFiled: July 15, 2016Date of Patent: December 3, 2019Assignee: LG Electronics Inc.Inventors: Moonmo Koo, Bumshik Lee, Sehoon Yea, Kyuwoon Kim
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Publication number: 20180324418Abstract: The present invention provides a method for processing a video signal, comprising generating a prediction block for a neighbor block using a reconstructed reference pixel of the neighbor block when the neighbor block adjacent to a current block is intra-coded; determining a refined intra prediction mode of the neighbor block based on the prediction block, where the refined intra prediction mode represents a mode which minimizes an error between the prediction block and a reconstructed neighbor block; generating a prediction mode candidate list for the current block based on the refined intra prediction mode; selecting an intra prediction mode for the current block from the prediction mode candidate list; and performing a prediction for the current block based on the intra prediction mode.Type: ApplicationFiled: October 13, 2016Publication date: November 8, 2018Inventors: Moonmo KOO, Sehoon YEA, Kyuwoon KIM, Bumshik LEE
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Publication number: 20180309996Abstract: The present invention provides a method for encoding a video signal comprising the steps of: obtaining activity information from the video signal, wherein the activity signal indicates information relating to edge characteristics of an image and includes edge orientation information and/or edge level information; determining conditionally non-linear transform (CNT) configuration information on the basis of the activity information; and performing CNT prediction coding on the basis of the CNT configuration information, wherein the CNT prediction coding involves performing prediction using all previously decoded pixel values.Type: ApplicationFiled: October 13, 2016Publication date: October 25, 2018Inventors: Moonmo KOO, Sehoon YEA, Eunyong SON, Kyuwoon KIM, Jin HEO, Junghak NAM, Bumshik LEE
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Publication number: 20180309987Abstract: An inter prediction method according to the present invention, which is performed by a decoding apparatus, comprises the steps of: acquiring prediction-related information and residual information from a received bitstream; performing inter prediction on a current block on the basis of the prediction-related information so as to generate prediction samples; generating a list of Wiener filter candidates on the basis of spatially neighboring blocks of the current block, and deriving Wiener filter coefficients for the current block on the basis of candidate blocks in the list of the Wiener filter candidates; filtering the prediction samples on the basis of the derived Wiener filter coefficients; deriving residual samples for the current block on the basis of the residual information; and generating a reconstructed picture on the basis of the filtered prediction samples and the residual samples. The present invention can reduce the amount of data for a residual signal and improve coding efficiency.Type: ApplicationFiled: January 25, 2016Publication date: October 25, 2018Inventors: Kyuwoon KIM, Jaehyun LIM, Naeri PARK, Jungdong SEO
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Publication number: 20180302620Abstract: The present invention provides a method for encoding a video signal comprising the steps of: performing block division with respect to a target unit of the video signal, wherein the block division is performed on the basis of square division and/or non-square division; determining the optimal block partition on the basis of a rate distortion cost, when the target unit is divided into a plurality of non-square blocks; and performing CNT prediction coding on the non-square blocks resulting from the optimal block partition, wherein the CNT prediction coding involves performing prediction using all previously decoded pixel values.Type: ApplicationFiled: October 17, 2016Publication date: October 18, 2018Inventors: Moonmo KOO, Bumshik LEE, Sehoon YEA, Kyuwoon KIM
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Publication number: 20180220158Abstract: A method for decoding a video signal using a graph-based transform, the method being characterized by including the steps of: parsing a transform index from the video signal; obtaining context information for a target unit, where the context information includes a prediction mode for a current block or peripheral blocks; obtaining an inverse-transform kernel on the basis of at least one of the transform index and the context information; and performing an inverse transform for the current block using the inverse transform kernel.Type: ApplicationFiled: July 21, 2016Publication date: August 2, 2018Inventors: Moonmo KOO, Sehoon YEA, Kyuwoon KIM, Bumshik LEE
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Publication number: 20180213233Abstract: The present invention provides a method for decoding a video signal by using a graph-based transform, comprising the steps of: parsing a transform index from the video signal; generating a line graph on the basis of edge information on a target unit; aligning transform vectors for each of segments of the line graph on the basis of a transform type corresponding to the transform index; acquiring a transform kernel by realigning the transform vectors for each of segments of the line graph according to a predetermined condition; and performing an inverse transform for the target unit on the basis of the transform kernel.Type: ApplicationFiled: July 15, 2016Publication date: July 26, 2018Inventors: Moonmo KOO, Bumshik LEE, Sehoon YEA, Kyuwoon KIM
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Publication number: 20180115787Abstract: The present invention provides a method for encoding a video signal, comprising: generating prediction pixels for the first row or column of a current block on the basis of boundary pixels neighboring to the current block; predicting remaining pixels within the current block respectively in the vertical direction or horizontal direction using the prediction pixels for the first row or column of the current block; generating a difference signal on the basis of the prediction pixels for the current block; and generating a transform-coded residual signal by applying a horizontal transform matrix and a vertical transform matrix to the difference signal.Type: ApplicationFiled: April 12, 2016Publication date: April 26, 2018Inventors: Moonmo KOO, Sehoon YEA, Kyuwoon KIM, Bumshik LEE
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Publication number: 20180041760Abstract: The present invention provides a method of decoding a video signal using graph-based transform comprising the steps: extracting prediction unit partition information of a current coding unit from the video signal; obtaining a graph-based transform kernel from predetermined table information based on the prediction unit partition information; and performing an inverse-transform of a transform unit using the graph-based transform kernel, wherein the graph-based transform kernel corresponds to at least one of the prediction unit partition information and an edge weight, and the edge weight is a predetermined value representing a correlation between pixels.Type: ApplicationFiled: February 4, 2016Publication date: February 8, 2018Applicant: LG Electronics Inc.Inventors: Moonmo KOO, Jin HEO, Eunyong SON, Sehoon YEA, Seungwook PARK, Kyuwoon KIM, Bumshik LEE
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Patent number: 8958565Abstract: An apparatus for controlling depth/distance of sound and method thereof are disclosed, by which an audio signal can be outputted to correspond to a depth of an image, i.e., a disparity in displaying a stereoscopic image. The present invention includes extracting at least one object from an image, measuring a depth change value in accordance with a motion of the object within the image, and changing a depth/distance level of the sound based on the depth change value of the object.Type: GrantFiled: March 20, 2012Date of Patent: February 17, 2015Assignee: LG Electronics Inc.Inventors: Sangoh Jeong, Hyunsoo Kim, Byeongmoon Jeon, Kyuwoon Kim, Joonwon Bhang
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Publication number: 20120243689Abstract: An apparatus for controlling depth/distance of sound and method thereof are disclosed, by which an audio signal can be outputted to correspond to a depth of an image, i.e., a disparity in displaying a stereoscopic image. The present invention includes extracting at least one object from an image, measuring a depth change value in accordance with a motion of the object within the image, and changing a depth/distance level of the sound based on the depth change value of the object.Type: ApplicationFiled: March 20, 2012Publication date: September 27, 2012Inventors: Sangoh Jeong, Hyunsoo Kim, Byeongmoon Jeon, Kyuwoon Kim, Joonwon Bhang