公开(公告)号：US12081790B2

公开(公告)日：2024-09-03

申请号：US18129290

申请日：2023-03-31

Applicant: SK TELECOM CO., LTD.

Inventor： Sunyeon Kim ,  Jeongyeon Lim ,  Joohee Moon ,  Yunglyul Lee ,  Haekwang Kim ,  Byeungwoo Jeon ,  Juock Lee ,  Dongwon Kim

IPC: H04N19/517 ,  H04N19/46 ,  H04N19/463 ,  H04N19/523 ,  H04N19/91

CPC classification number: H04N19/517 ,  H04N19/46 ,  H04N19/463 ,  H04N19/523 ,  H04N19/91

Abstract: The present disclosure relates to a method and apparatus for improving the encoding efficiency by adaptively changing the resolution of the motion vector in the inter prediction encoding and inter prediction decoding of a video. The apparatus includes: a predicted motion vector calculator for calculating a predicted motion vector of a current block to be encoded using motion vectors of one or more surrounding blocks; and a skip mode encoder for encoding a result of performing a prediction of the current block and information indicating that the current block is a skip block when the predicted motion vector satisfies a skip condition, wherein at least one motion vector among the motion vectors of the surrounding blocks and the motion vector of the current block has a resolution different from resolutions of the other motion vectors.

公开(公告)号：US12010307B2

公开(公告)日：2024-06-11

申请号：US17971991

申请日：2022-10-24

Applicant: SK TELECOM CO., LTD.

Inventor： Jinhan Song ,  Jeongyeon Lim ,  Haekwang Kim ,  Joohee Moon ,  Yunglyul Lee ,  Jongki Han ,  Byeungwoo Jeon

IPC: H04N19/119 ,  H04N19/124 ,  H04N19/129 ,  H04N19/182 ,  H04N19/436 ,  H04N19/625 ,  H04N19/63 ,  H04N19/70 ,  H04N19/91

CPC classification number: H04N19/119 ,  H04N19/124 ,  H04N19/129 ,  H04N19/182 ,  H04N19/436 ,  H04N19/625 ,  H04N19/63 ,  H04N19/70 ,  H04N19/91

Abstract: The present disclosure provides a method and apparatus for subband-coding a frequency conversion unit and a video encoding/decoding method a video encoding/decoding apparatus using the same. The method and the apparatus for subband-coding the frequency conversion unit include generating an encoding stream by splitting the frequency conversion unit into one or more frequency domains, generating frequency domain encoding information according to whether there is a non-zero frequency coefficient in each frequency domain, scanning the frequency coefficient of each frequency domain to generate a frequency domain frequency coefficient stream, and binarizing and encoding the frequency domain encoding information and the scanned frequency domain frequency coefficient stream.

公开(公告)号：US11638030B2

公开(公告)日：2023-04-25

申请号：US17507408

申请日：2021-10-21

Applicant: SK TELECOM CO., LTD.

Inventor： Sunyeon Kim ,  Jeongyeon Lim ,  Joohee Moon ,  Yunglyul Lee ,  Haekwang Kim ,  Byeungwoo Jeon ,  Juock Lee ,  Dongwon Kim

IPC: H04N19/517 ,  H04N19/46 ,  H04N19/463 ,  H04N19/523 ,  H04N19/91

Abstract: The present disclosure relates to a method and apparatus for improving the encoding efficiency by adaptively changing the resolution of the motion vector in the inter prediction encoding and inter prediction decoding of a video. The apparatus includes: a predicted motion vector calculator for calculating a predicted motion vector of a current block to be encoded using motion vectors of one or more surrounding blocks; and a skip mode encoder for encoding a result of performing a prediction of the current block and information indicating that the current block is a skip block when the predicted motion vector satisfies a skip condition, wherein at least one motion vector among the motion vectors of the surrounding blocks and the motion vector of the current block has a resolution different from resolutions of the other motion vectors.

公开(公告)号：US11425392B2

公开(公告)日：2022-08-23

申请号：US17161761

申请日：2021-01-29

Applicant: SK TELECOM CO., LTD.

Inventor： Jeongyeon Lim ,  Joong Gunn Park ,  Byeungwoo Jeon ,  Haekwang Kim ,  Joohee Moon ,  Yunglyul Lee ,  Jongki Han ,  Jungyoup Yang ,  Jaehwan Kim ,  Kwanghyun Won ,  Hoyoung Lee

IPC: H04N19/139 ,  H04N19/61 ,  H04N19/503 ,  H04N19/52 ,  H04N19/176 ,  H04N19/109 ,  H04N19/147

Abstract: A video encoding apparatus includes: an inter prediction unit to determine a motion parameter of a current block and generate a predicted block of the current block, by performing a motion estimation on the current block; and an optimal mode determining unit to set a prediction mode of the current block as a SKIP mode when (i) the motion parameter of the current block is identical to a motion parameter of a candidate block among a plurality of candidate blocks and (ii) all-zero coefficients result from a transform and a quantization performed on a residual data block representing the difference between the current block and the predicted block.

公开(公告)号：US09955167B1

公开(公告)日：2018-04-24

申请号：US15851000

申请日：2017-12-21

Applicant: SK TELECOM CO., LTD.

Inventor： Jinhan Song ,  Jeongyeon Lim ,  Joohee Moon ,  Yunglyul Lee ,  Haekwang Kim ,  Byeungwoo Jeon ,  Jongki Han ,  Hyoungmee Park ,  Juock Lee

IPC: H04N19/147 ,  H04N19/109 ,  H04N19/122 ,  H04N19/119 ,  H04N19/61 ,  H04N19/13 ,  H04N19/105 ,  H04N19/176 ,  H04N19/11 ,  H04N19/107

CPC classification number: H04N19/147 ,  H04N19/105 ,  H04N19/107 ,  H04N19/109 ,  H04N19/11 ,  H04N19/119 ,  H04N19/122 ,  H04N19/13 ,  H04N19/176 ,  H04N19/61

Abstract: A video decoding method, includes: reconstructing a syntax corresponding to at least one of a first block, a second block and a third block, wherein the first block is generated by dividing a frame for decoding, the second block corresponds to a unit of a prediction and is generated by dividing the first block, and the third block corresponds to a unit of transformation and is generated by dividing the first block in a tree structure; and reconstructing a prediction block corresponding to at least one of the first block, the second block and the third block, wherein the second block includes a batch mode flag for indicating whether a batch mode is used.

公开(公告)号：US09888248B2

公开(公告)日：2018-02-06

申请号：US14937277

申请日：2015-11-10

Applicant: SK TELECOM CO., LTD.

Inventor： Jinhan Song ,  Jeongyeon Lim ,  Haekwang Kim ,  Joohee Moon ,  Yunglyul Lee ,  Jongki Han ,  Byeungwoo Jeon

IPC: H04N7/12 ,  H04N19/176 ,  H04N19/52 ,  H04N19/615 ,  H04N19/124 ,  H04N19/44 ,  H04N19/513 ,  H04N19/61 ,  H04N19/503

CPC classification number: H04N19/176 ,  H04N19/124 ,  H04N19/44 ,  H04N19/503 ,  H04N19/513 ,  H04N19/52 ,  H04N19/61 ,  H04N19/615

Abstract: An apparatus for decoding a current block includes: a decoding unit to extract a first identification information from a bitstream, and reconstruct a quantized frequency residual block of the current block from the bitstream; a dequantization and inverse transform unit to dequantize and inversely transform the quantized frequency residual block to reconstruct a residual block of the current block; an inter prediction unit to generate the plurality of motion vector candidates of the current block from neighboring blocks of the current blocks, select a motion vector candidate from the plurality of motion vector candidates based on a second identification information, the second identification information being decoded from the bitstream, reconstruct the motion vector of the current block as the selected motion vector candidate, and generate a predicted block of the current block by using the reconstructed motion vector of the current block.

公开(公告)号：US09749653B2

公开(公告)日：2017-08-29

申请号：US15449446

申请日：2017-03-03

Applicant: SK TELECOM CO., LTD.

Inventor： Sunyeon Kim ,  Jeongyeon Lim ,  Byeungwoo Jeon ,  Joohee Moon ,  Yunglyul Lee ,  Haekwang Kim ,  Jongki Han ,  Jungyoup Yang ,  Kwanghyun Won

IPC: H04N7/32 ,  H04N19/52 ,  H04N19/61 ,  H04N19/124 ,  H04N19/56

CPC classification number: H04N19/52 ,  H04N19/124 ,  H04N19/132 ,  H04N19/176 ,  H04N19/182 ,  H04N19/56 ,  H04N19/57 ,  H04N19/61

Abstract: The present disclosure relates to a method and apparatus for encoding/decoding a motion vector and a method and apparatus for encoding/decoding video using same. The motion vector encoding method includes selecting a predicted motion vector candidate set including one or more predicted motion vector candidates for a block; determining one or more search ranges for predicted motion vector candidate set; selecting one predicted motion vector candidate among one or more predicted motion vector candidates as predicted motion vector for each search point with respect to each search point within search range by first determination criterion prearranged with video decoding apparatus; selecting one predicted motion vector among the predicted motion vectors for each search point by a second determination criterion not prearranged with the video decoding apparatus, and determining predicted motion vector, differential motion vector, and current motion vector; and generating and encoding the differential motion vector as motion information.

公开(公告)号：US09686562B2

公开(公告)日：2017-06-20

申请号：US15298492

申请日：2016-10-20

Applicant: SK TELECOM CO., LTD.

Inventor： Jinhan Song ,  Jeongyeon Lim ,  Yunglyul Lee ,  Joohee Moon ,  Haekwang Kim ,  Byeungwoo Jeon ,  Jongki Han ,  Jaehee Cho ,  Hyundong Kim ,  Daeyeon Kim ,  Sungwook Hong

IPC: H04N19/61 ,  H04N19/50 ,  H04N19/176 ,  H04N19/119 ,  H04N19/147 ,  H04N19/109 ,  H04N19/523 ,  H04N19/124 ,  H04N19/43

CPC classification number: H04N19/50 ,  H04N19/109 ,  H04N19/119 ,  H04N19/124 ,  H04N19/147 ,  H04N19/176 ,  H04N19/43 ,  H04N19/523 ,  H04N19/61

Abstract: A video encoding apparatus, includes: a block partitioning unit to determine a partition form, among candidate partition forms, for partitioning a current block into one or more partition blocks; a prediction unit to generate one or more predicted blocks respectively corresponding to the one or more partition blocks by using a scale factor which indicates a ratio of pixel sampling; a subtractor to generate a residual block of the current block by subtracting the predicted blocks from one or more partition blocks corresponding thereto; a transformer to generate at least one transform block by transforming the residual block; a quantizer to generate at least one quantized transform block by quantizing the at least one transform block; and an encoder to encode, into the bitstream, information on the scale factor, information on the determined partition form and the at least one quantized transform block.

公开(公告)号：US09674520B2

公开(公告)日：2017-06-06

申请号：US14282462

申请日：2014-05-20

Applicant: SK TELECOM CO., LTD.

Inventor： Jeongyeon Lim ,  Joong Gunn Park ,  Yunglyul Lee ,  Joohee Moon ,  Haekwang Kim ,  Byeungwoo Jeon ,  Jongki Han ,  Ryeonghee Kwon

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/147 ,  H04N19/19 ,  H04N19/96

CPC classification number: H04N19/103 ,  G06T9/004 ,  H04N1/417 ,  H04N5/145 ,  H04N19/119 ,  H04N19/147 ,  H04N19/157 ,  H04N19/176 ,  H04N19/19 ,  H04N19/513 ,  H04N19/52 ,  H04N19/61 ,  H04N19/70 ,  H04N19/96

Abstract: An apparatus for encoding images includes: a predictor to determine a prediction unit (PU) mode among a plurality of PU modes indicating types of partition of a current coding unit (CU) into one or more prediction units (PUs), and generate a predicted block of the current CU by performing an intra prediction or an inter prediction for each PU of the determined PU mode, wherein a size of the current CU is 2N×2N, and the plurality of PU modes includes 2N×hN or hN×2N PU mode in which the current CU is partitioned into PUs respectively having a size of 2N×hN or hN×2N, h being a fractional number smaller than 1; a subtractor to subtract the predicted block from the current CU to generate a residual block; a transformer to transform the residual block into a frequency domain to generate a frequency one or more transform blocks.

公开(公告)号：US09602834B2

公开(公告)日：2017-03-21

申请号：US15031378

申请日：2016-04-22

Applicant: SK TELECOM CO., LTD.

Inventor： Jinhan Song ,  Jeongyeon Lim ,  Yunglyul Lee ,  Joohee Moon ,  Haekwang Kim ,  Byeungwoo Jeon ,  Jongki Han ,  Jeong Pil Kim ,  Daeyeon Kim

IPC: H04N19/523 ,  H04N19/126 ,  H04N19/176 ,  H04N19/182 ,  H04N19/184 ,  H04N19/124 ,  H04N19/513 ,  H04N19/70 ,  H04N19/80

CPC classification number: H04N19/523 ,  H04N19/105 ,  H04N19/124 ,  H04N19/126 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/182 ,  H04N19/184 ,  H04N19/186 ,  H04N19/513 ,  H04N19/61 ,  H04N19/70 ,  H04N19/80

Abstract: A video encoding apparatus includes: a predictor to generate a prediction block based on interpolating chroma sub-samples of a reference frame referenced by a motion vector of a current block; a subtractor to generate a residual block based on subtracting the prediction block from the current block; a transformer to generate a frequency-transformed block based on transforming the residual block; a quantizer to generate a quantized frequency-transformed block based on quantizing the frequency-transformed block; and an encoder to encode the quantized frequency-transformed block into a bitstream.