Patents Assigned to SK Telecom Co., Ltd.
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Patent number: 12010307Abstract: 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.Type: GrantFiled: October 24, 2022Date of Patent: June 11, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jinhan Song, Jeongyeon Lim, Haekwang Kim, Joohee Moon, Yunglyul Lee, Jongki Han, Byeungwoo Jeon
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Patent number: 12010762Abstract: Provided is a wireless communication terminal that wirelessly communicates. The wireless communication terminal includes a transceiver configured to transmit and receive wireless signals; and a processor configured to process the wireless signals. The processor is configured to: generate a trigger frame for triggering uplink transmission based random access of at least one wireless communication terminal, and insert the trigger frame into a physical layer protocol data unit (PPDU) to transmit the PPDU.Type: GrantFiled: February 12, 2022Date of Patent: June 11, 2024Assignees: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., SK TELECOM CO., LTD.Inventors: Geonjung Ko, Woojin Ahn, Juhyung Son, Jinsam Kwak
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Patent number: 12004262Abstract: Provided is a wireless communication terminal that wirelessly communicates. The wireless communication terminal includes a transceiver configured to transmit and receive wireless signals; and a processor configured to process the wireless signals. The processor is configured to: generate a trigger frame for triggering uplink transmission based random access of at least one wireless communication terminal, and insert the trigger frame into a physical layer protocol data unit (PPDU) to transmit the PPDU.Type: GrantFiled: February 11, 2022Date of Patent: June 4, 2024Assignees: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., SK TELECOM CO., LTD.Inventors: Geonjung Ko, Woojin Ahn, Juhyung Son, Jinsam Kwak
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Patent number: 12003736Abstract: Disclosed herein is a method for adaptive bidirectional optical flow estimation for inter prediction compensation during video encoding. The method aims to reduce complexity and/or cost of bidirectional optical flow (BIO) at a pixel level or a subblock level.Type: GrantFiled: February 17, 2022Date of Patent: June 4, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jeong-yeon Lim, Hyo Song Kim, Se-hoon Son, Jae-seob Shin, Sun-young Lee
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Patent number: 11997292Abstract: Disclosed herein is a method for adaptive bidirectional optical flow estimation for inter prediction compensation during video encoding. The method aims to reduce complexity and/or cost of bidirectional optical flow (BIO) at a pixel level or a subblock level.Type: GrantFiled: February 17, 2022Date of Patent: May 28, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jeong-yeon Lim, Hyo Song Kim, Se-hoon Son, Jae-seob Shin, Sun-young Lee
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Patent number: 11997268Abstract: 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.Type: GrantFiled: October 21, 2022Date of Patent: May 28, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jinhan Song, Jeongyeon Lim, Haekwang Kim, Joohee Moon, Yunglyul Lee, Jongki Han, Byeungwoo Jeon
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Patent number: 11997255Abstract: A video decoding method for predicting a picture, which is split into equal-sized coding tree blocks, in units of blocks, the method includes: reconstructing a block vector for a current coding block in a current coding tree block to be decoded, by decoding block vector information from a bitstream, wherein the current coding block is one of blocks split from the current coding tree block in a tree structure; and setting, as a prediction block of the current coding block, a reference block indicated by the block vector in the picture in which the current coding block is located.Type: GrantFiled: March 16, 2020Date of Patent: May 28, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jae Il Kim, Sun Young Lee, Kyung Hwan Ko, Jae Seob Shin
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Patent number: 11997269Abstract: 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.Type: GrantFiled: October 21, 2022Date of Patent: May 28, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jinhan Song, Jeongyeon Lim, Haekwang Kim, Joohee Moon, Yunglyul Lee, Jongki Han, Byeungwoo Jeon
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Patent number: 11997285Abstract: A method of inter-predicting a current block using any one of a plurality of bi-prediction modes is disclosed. The method comprises decoding, from a bitstream, mode information indicating whether a first mode included in the plurality of bi-prediction modes is applied to the current block. When the mode information indicates that the first mode is applied to the current block, the method further comprises: decoding, from the bitstream, first motion information including differential motion vector information and predicted motion vector information for a first motion vector and second motion information not including at least a portion of predicted motion vector information and differential motion vector information for a second motion vector; and deriving the first motion vector based on the first motion information and deriving the second motion vector based on both at least a portion of the first motion information and the second motion information.Type: GrantFiled: December 27, 2022Date of Patent: May 28, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jae Il Kim, Sun Young Lee, Tae Young Na, Se Hoon Son, Jae Seob Shin
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Patent number: 11991031Abstract: In order to efficiently schedule data transmission of a plurality of terminals, the wireless communication terminal receives a trigger frame indicating uplink multi-user transmission, and transmits an uplink multi-user PPD U (PLCP Protocol Data Unit) in response to the received trigger frame. In this case, the trigger frame and the non-legacy preamble of the uplink multi-user PPDU include remaining TXOP (Transmission Opportunity) time information of the uplink multi-user transmission process.Type: GrantFiled: August 25, 2022Date of Patent: May 21, 2024Assignees: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., SK TELECOM CO., LTD.Inventors: Juhyung Son, Jinsam Kwak, Geonjung Ko
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Patent number: 11991372Abstract: A video decoding method for decoding an input bitstream in which each of pictures has been encoded with being split into a plurality of tiles, the method includes decoding partial decoding information included in the input bitstream and determining one or more target tiles to be decoded among the plurality of tiles according to the partial decoding information; and decoding video data corresponding to the one or more target tiles, wherein the partial decoding information includes at least one of first information indicating whether to perform partial decoding and second information indicating an area on which partial decoding is to be performed.Type: GrantFiled: October 12, 2022Date of Patent: May 21, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jeong-yeon Lim, Sun-young Lee, Se-hoon Son, Jae-seob Shin, Hyeong-duck Kim, Gyeong-taek Lee, Jung-han Kim
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Patent number: 11991365Abstract: A method of inter-predicting a current block using any one of a plurality of bi-prediction modes is disclosed. The method comprises decoding, from a bitstream, mode information indicating whether a first mode included in the plurality of bi-prediction modes is applied to the current block. When the mode information indicates that the first mode is applied to the current block, the method further comprises: decoding, from the bitstream, first motion information including differential motion vector information and predicted motion vector information for a first motion vector and second motion information not including at least a portion of predicted motion vector information and differential motion vector information for a second motion vector; and deriving the first motion vector based on the first motion information and deriving the second motion vector based on both at least a portion of the first motion information and the second motion information.Type: GrantFiled: December 27, 2022Date of Patent: May 21, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jae Il Kim, Sun Young Lee, Tae Young Na, Se Hoon Son, Jae Seob Shin
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Patent number: 11991350Abstract: A method and apparatus for deriving an intra-prediction mode are disclosed. At least one embodiment of the present disclosure provides a method of deriving an intra-prediction mode, including (i) obtaining, based on reference line information indicating any one of a plurality of reference lines, most probable mode (MPM) information indicating whether an intra-prediction mode of a current block is included in an MPM list lacking a planar mode, (ii) determining, based on the reference line information and the MPM information, planar information indicating whether the intra-prediction mode of the current block is the planar mode, and (iii) deriving the intra-prediction mode of the current block by using the planar information.Type: GrantFiled: May 27, 2020Date of Patent: May 21, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jae Il Kim, Sun Young Lee, Kyung Hwan Ko
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Patent number: 11991032Abstract: In order to efficiently schedule data transmission of a plurality of terminals, the wireless communication terminal receives a trigger frame indicating uplink multi-user transmission, and transmits an uplink multi-user PPD U (PLCP Protocol Data Unit) in response to the received trigger frame. In this case, the trigger frame and the non-legacy preamble of the uplink multi-user PPDU include remaining TXOP (Transmission Opportunity) time information of the uplink multi-user transmission process.Type: GrantFiled: August 25, 2022Date of Patent: May 21, 2024Assignees: WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., SK TELECOM CO., LTD.Inventors: Juhyung Son, Jinsam Kwak, Geonjung Ko
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Patent number: 11991381Abstract: A coding tool setting method and a video decoding apparatus using the same are disclosed. An embodiment of the present invention relates to a method for setting whether or not to use a coding tool, and provides a coding tool setting method comprising the steps of: decoding, from a bitstream, a profile syntax element indicating a target profile among available profiles and a coding tool syntax element for configurable coding tools, the coding tool syntax element indicating whether or not to apply the coding tool; and setting, on the basis of the coding tool syntax element, target coding tools that are coding tools included in the target profile to be on or off.Type: GrantFiled: February 7, 2023Date of Patent: May 21, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jae Il Kim, Sun Young Lee
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Patent number: 11985328Abstract: A method of inter-predicting a current block using any one of a plurality of bi-prediction modes is disclosed. The method comprises decoding, from a bitstream, mode information indicating whether a first mode included in the plurality of bi-prediction modes is applied to the current block. When the mode information indicates that the first mode is applied to the current block, the method further comprises: decoding, from the bitstream, first motion information including differential motion vector information and predicted motion vector information for a first motion vector and second motion information not including at least a portion of predicted motion vector information and differential motion vector information for a second motion vector; and deriving the first motion vector based on the first motion information and deriving the second motion vector based on both at least a portion of the first motion information and the second motion information.Type: GrantFiled: December 27, 2022Date of Patent: May 14, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jae Il Kim, Sun Young Lee, Tae Young Na, Se Hoon Son, Jae Seob Shin
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Patent number: 11985335Abstract: A video decoding method for decoding an input bitstream in which each of pictures has been encoded with being split into a plurality of tiles, the method includes decoding partial decoding information included in the input bitstream and determining one or more target tiles to be decoded among the plurality of tiles according to the partial decoding information; and decoding video data corresponding to the one or more target tiles, wherein the partial decoding information includes at least one of first information indicating whether to perform partial decoding and second information indicating an area on which partial decoding is to be performed.Type: GrantFiled: October 12, 2022Date of Patent: May 14, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jeong-yeon Lim, Sun-young Lee, Se-hoon Son, Jae-seob Shin, Hyeong-duck Kim, Gyeong-taek Lee, Jung-han Kim
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Patent number: 11985336Abstract: A video decoding method for decoding an input bitstream in which each of pictures has been encoded with being split into a plurality of tiles, the method includes decoding partial decoding information included in the input bitstream and determining one or more target tiles to be decoded among the plurality of tiles according to the partial decoding information; and decoding video data corresponding to the one or more target tiles, wherein the partial decoding information includes at least one of first information indicating whether to perform partial decoding and second information indicating an area on which partial decoding is to be performed.Type: GrantFiled: October 12, 2022Date of Patent: May 14, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jeong-yeon Lim, Sun-young Lee, Se-hoon Son, Jae-seob Shin, Hyeong-duck Kim, Gyeong-taek Lee, Jung-han Kim
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Patent number: 11985334Abstract: A video decoding method for decoding an input bitstream in which each of pictures has been encoded with being split into a plurality of tiles, the method includes decoding partial decoding information included in the input bitstream and determining one or more target tiles to be decoded among the plurality of tiles according to the partial decoding information; and decoding video data corresponding to the one or more target tiles, wherein the partial decoding information includes at least one of first information indicating whether to perform partial decoding and second information indicating an area on which partial decoding is to be performed.Type: GrantFiled: October 12, 2022Date of Patent: May 14, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jeong-yeon Lim, Sun-young Lee, Se-hoon Son, Jae-seob Shin, Hyeong-duck Kim, Gyeong-taek Lee, Jung-han Kim
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Patent number: 11985327Abstract: A method of inter-predicting a current block using any one of a plurality of bi-prediction modes is disclosed. The method comprises decoding, from a bitstream, mode information indicating whether a first mode included in the plurality of bi-prediction modes is applied to the current block. When the mode information indicates that the first mode is applied to the current block, the method further comprises: decoding, from the bitstream, first motion information including differential motion vector information and predicted motion vector information for a first motion vector and second motion information not including at least a portion of predicted motion vector information and differential motion vector information for a second motion vector; and deriving the first motion vector based on the first motion information and deriving the second motion vector based on both at least a portion of the first motion information and the second motion information.Type: GrantFiled: December 27, 2022Date of Patent: May 14, 2024Assignee: SK TELECOM CO., LTD.Inventors: Jae Il Kim, Sun Young Lee, Tae Young Na, Se Hoon Son, Jae Seob Shin