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1.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：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：US10313699B2
公开(公告)日：2019-06-04
申请号：US15519620
申请日：2015-10-07
发明人： Hyung-ju Chun , Chan-sik Park , Ki-won Yoo , Jae-moon Kim
IPC分类号： H04N19/44 , H04N19/105 , H04N19/156 , H04N19/172 , H04N19/176 , H04N19/436 , H04N19/513
摘要： A video decoding method includes obtaining a motion vector of a current block belonging to a first picture from a bitstream, performed by a first decoding unit; determining whether a reference block indicated by the motion vector is decoded, performed by the first decoding unit; and decoding the current block, based on whether the reference block is decoded. The reference block is included in a second picture decoded by a second decoding unit. The first picture and the second picture are decoded in parallel.
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公开(公告)号：US10250879B2
公开(公告)日：2019-04-02
申请号：US15500756
申请日：2015-06-29
发明人： Sung-dae Kim , Ki-won Yoo , Jae-moon Kim , Sang-kwon Na
IPC分类号： H04N7/12 , H04N19/117 , H04N19/13 , H04N19/176 , H04N19/182 , H04N19/157 , H04N19/82
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：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：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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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：US10567762B2
公开(公告)日：2020-02-18
申请号：US15574536
申请日：2016-06-01
发明人： Chan-sik Park , Jae-moon Kim
IPC分类号： H04N19/119 , H04N19/50 , H04N19/176 , H04N19/463 , H04N19/117
摘要： A method of performing embedded compression (EC) on image data includes receiving decoded image data; determining a block size of image data waiting for embedded compression from among the received image data; and comparing the determined block size of the image data waiting for embedded compression with an EC block size that is an embedded compression unit, the method further including: if the determined block size of the image data waiting for embedded compression is equal to or greater than the EC block size, embedding and compressing the received image data; and if the determined block size of the image data waiting for embedded compression is smaller than the EC block size, storing tag information of the received image data.
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公开(公告)号：US20190222840A1
公开(公告)日：2019-07-18
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： H04N19/117 , H04N19/82 , H04N19/157 , H04N19/13 , H04N19/182 , H04N19/176
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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