US 11,057,616 B2
Video encoding method and apparatus therefor, and video decoding method and apparatus therefor
Sang-kwon Na, Seoul (KR); Soo-ik Chae, Seoul (KR); Ki-won Yoo, Seoul (KR); Jae-moon Kim, Uiwang-si (KR); and Woo-seok Jeong, Seoul (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR); and SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, Seoul (KR)
Appl. No. 15/735,042
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR); and SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION, Seoul (KR)
PCT Filed Jun. 8, 2016, PCT No. PCT/KR2016/006025
§ 371(c)(1), (2) Date Dec. 8, 2017,
PCT Pub. No. WO2016/200124, PCT Pub. Date Dec. 15, 2016.
Claims priority of application No. 10-2015-0081530 (KR), filed on Jun. 9, 2015.
Prior Publication US 2020/0036966 A1, Jan. 30, 2020
Int. Cl. H04N 11/02 (2006.01); H04N 19/103 (2014.01); H04N 19/176 (2014.01); H04N 19/59 (2014.01)
CPC H04N 19/103 (2014.11) [H04N 19/176 (2014.11); H04N 19/59 (2014.11)] 7 Claims
OG exemplary drawing
 
1. A video decoding method comprising:
obtaining a residue of a first sampling rate regarding a current block by decoding a bitstream;
when the current block is intra predicted, generating a prediction block of the current block of the first sampling rate which is same as the first sampling rate of the residue by using a block that is previously decoded at the first sampling rate and then stored in a buffer;
when the current block is inter predicted, generating a prediction block of a second sampling rate, which is different from the first sampling rate of the residue, by using an image previously decoded at the second sampling rate which is changed from at least one block of the first sampling rate comprised in the image previously decoded, wherein the at least one block of the first sampling rate is based on another residue of the first sampling rate, and wherein the another residue of the first sampling rate is obtained from the bitstream and is related to the image previously decoded, and then generating the prediction block of the current block of the first sampling rate which is same as the first sampling rate of the residue by changing the generated prediction block of the second sampling rate to the prediction block of the first sampling rate; and
generating a reconstruction block of the first sampling rate by using the prediction block of the first sampling rate and the residue of the first sampling rate,
wherein the first sampling rate is higher than the second sampling rate.