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公开(公告)号：US10715811B2
公开(公告)日：2020-07-14
申请号：US14910887
申请日：2014-08-11
发明人： Jae-moon Kim , Sung-oh Kim , Ki-won Yoo , Hyung-ju Chun
IPC分类号： H04N19/176 , H04N19/52 , H04N19/139 , H04N19/119 , H04N19/137 , H04N19/96 , H04N19/196 , H04N19/124 , H04N19/159
摘要： Provided are a method and apparatus for determining a merge mode by using motion information of a previous prediction unit. The method of determining a merge mode includes obtaining a merge mode cost of a lower depth based on a merge mode cost of a coding unit of an upper depth obtained by using motion information of a merge mode of the coding unit of the upper depth corresponding to a merge mode of the coding unit of the lower depth.
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公开(公告)号：US10321155B2
公开(公告)日：2019-06-11
申请号：US15321988
申请日：2015-06-26
发明人： Ki-won Yoo , Jae-moon Kim , Sang-kwon Na
IPC分类号： H04N19/59 , H04N19/172 , H04N19/119 , H04N19/96 , H04N19/157
摘要： 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.
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公开(公告)号：US09936223B2
公开(公告)日：2018-04-03
申请号：US14336326
申请日：2014-07-21
发明人： Sang-kwon Na , Ki-won Yoo , Jae-Hyun Kim , Kyo-hyuk Lee
IPC分类号： H04N7/12 , H04N11/02 , H04N11/04 , H04N19/593 , H04N19/436 , H04N19/46 , H04N19/96
CPC分类号： H04N19/593 , H04N19/436 , H04N19/46 , H04N19/96
摘要： 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.
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4.发明授权公开(公告)号：US11057616B2
公开(公告)日：2021-07-06
申请号：US15735042
申请日：2016-06-08
发明人： Sang-kwon Na , Soo-ik Chae , Ki-won Yoo , Jae-moon Kim , Woo-seok Jeong
IPC分类号： H04N11/02 , H04N19/103 , H04N19/176 , H04N19/59
摘要： Provided is a video decoding method including obtaining a residue of a first bit-depth with respect to a current block by decoding a bitstream; when intra predicting the current block, generating a prediction block of the current block by using a block that is previously decoded at the first bit-depth and then stored in a buffer; and generating a reconstruction block of the first bit-depth by using the prediction block and the residue of the first bit-depth. When the current block is inter predicted, the video decoding method may further include generating a prediction block of a second bit-depth by using an image previously decoded at the second bit-depth, and generating the prediction block of the current block by changing the generated prediction block of the second bit-depth to the first bit-depth. The first bit-depth is higher than the second bit-depth.
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公开(公告)号：US10244247B2
公开(公告)日：2019-03-26
申请号：US15251476
申请日：2016-08-30
发明人： Chan-sik Park , Myung-ho Kim , Sang-kwon Na , Ki-won Yoo , Chang-su Han
IPC分类号： H04N19/436 , H04N19/523 , H04N19/80 , H04N19/105 , H04N19/13 , H04N19/124 , H04N19/433 , H04N19/17 , H04N19/176 , H04N19/182
摘要： 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.
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公开(公告)号：US11032554B2
公开(公告)日：2021-06-08
申请号：US15513230
申请日：2015-09-23
发明人： Sang-kwon Na , Sung-oh Kim , Jae-moon Kim , Ki-won Yoo
IPC分类号： H04N19/176 , H04N19/423 , H04N19/58 , H04N19/513 , H04N19/172 , H04N19/517 , H04N19/61 , H04N19/91 , H04N19/46
摘要： 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.
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公开(公告)号：US10291915B2
公开(公告)日：2019-05-14
申请号：US14640621
申请日：2015-03-06
发明人： Jae-moon Kim , Ki-won Yoo , Chang-su Han , Sang-kwon Na , Hyung-ju Chun
IPC分类号： H04N19/132 , H04N19/159 , H04N19/167 , H04N19/17
摘要： 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.
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公开(公告)号：US10701357B2
公开(公告)日：2020-06-30
申请号：US16363720
申请日：2019-03-25
发明人： Sung-dae Kim , Ki-won Yoo , Jae-moon Kim , Sang-kwon Na
IPC分类号： H04N7/12 , H04N19/117 , H04N19/157 , H04N19/82 , H04N19/13 , H04N19/176 , H04N19/182
摘要： 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.
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公开(公告)号：US10277917B2
公开(公告)日：2019-04-30
申请号：US15174157
申请日：2016-06-06
发明人： Sang-kwon Na , Soo-ik Chae , Ki-won Yoo , Soon-woo Choi , Woo-seok Jeong
IPC分类号： H04N19/61 , H04N19/124 , H04N19/176 , H04N19/567
摘要： 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.
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公开(公告)号：US09762908B2
公开(公告)日：2017-09-12
申请号：US14336072
申请日：2014-07-21
发明人： Jae-moon Kim , Ki-won Yoo , Jae-Hyun Kim , Kyo-hyuk Lee
IPC分类号： H04N7/12 , H04N11/02 , H04N11/04 , H04N19/105 , H04N19/139 , H04N19/176 , H04N19/513 , H04N19/577
CPC分类号： H04N19/105 , H04N19/139 , H04N19/176 , H04N19/513 , H04N19/577
摘要： Provided are a method and apparatus for encoding a video and a method and apparatus for decoding a video. The method of encoding includes: determining, for a current block, bidirectional motion estimation information comprising an L0 motion vector, an L1 motion vector, an L0 reference vector, and an L1 reference picture by performing bidirectional motion estimation on the current block; determining whether to use the determined bidirectional motion estimation information as prediction information of the current block based on whether the L0 reference picture and the L1 reference picture are the same and based on a difference value between the L0 motion vector and the L1 motion vector; and in response to determining to use the determined bidirectional motion estimation information as the prediction information of the current block, encoding the determined bidirectional motion estimation information as the prediction information of the current block.
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