US 11,743,467 B2
Method and device for entropy encoding coefficient level, and method and device for entropy decoding coefficient level
Yinji Piao, Suwon-si (KR); Gahyun Ryu, Suwon-si (KR); Minsoo Park, Suwon-si (KR); Minwoo Park, Suwon-si (KR); Seungsoo Jeong, Suwon-si (KR); Kiho Choi, Suwon-si (KR); Narae Choi, Suwon-si (KR); Woongil Choi, Suwon-si (KR); and Anish Tamse, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Appl. No. 17/293,351
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
PCT Filed Nov. 12, 2019, PCT No. PCT/KR2019/015308
§ 371(c)(1), (2) Date May 12, 2021,
PCT Pub. No. WO2020/101313, PCT Pub. Date May 22, 2020.
Claims priority of provisional application 62/783,818, filed on Dec. 21, 2018.
Claims priority of provisional application 62/759,927, filed on Nov. 12, 2018.
Prior Publication US 2022/0014748 A1, Jan. 13, 2022
Int. Cl. H04N 19/13 (2014.01); H04N 19/18 (2014.01); H04N 19/70 (2014.01); H04N 19/91 (2014.01); H03M 7/40 (2006.01)
CPC H04N 19/13 (2014.11) [H04N 19/18 (2014.11); H04N 19/70 (2014.11); H04N 19/91 (2014.11); H03M 7/4075 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A method of entropy decoding a coefficient included in video data, the method comprising:
obtaining absolute values of coefficients of predetermined locations from among coefficients entropy decoded prior to a current coefficient;
determining a sum of the absolute values of the coefficients of the predetermined locations;
determining a Rice parameter, based on a difference between the sum of the absolute values and a base level;
parsing, from a bitstream, coefficient level information regarding an absolute value of the current coefficient; and
obtaining the absolute value of the current coefficient based on the coefficient level information and the determined Rice parameter,
wherein the coefficients of the predetermined locations include at least one of a first coefficient adjacent to a right side of the current coefficient, a second coefficient adjacent to a right side of the first coefficient, a third coefficient adjacent to a lower side of the current coefficient, a fourth coefficient adjacent to a lower side of the third coefficient, or a fifth coefficient adjacent in the lower right diagonal direction of the current coefficient,
wherein the base level is determined based on whether the coefficient level information is absolute remainder information or absolute level information.