US 12,382,102 B2
Coefficient encoding method, coefficient decoding method, encoding device, decoding device, and storage medium
Hang Huang, Dongguan (CN); Qichao Yuan, Dongguan (CN); Fan Wang, Dongguan (CN); and Zhihuang Xie, Dongguan (CN)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Dongguan (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Dongguan (CN)
Filed on Sep. 12, 2023, as Appl. No. 18/367,101.
Application 18/367,101 is a continuation of application No. PCT/CN2021/080635, filed on Mar. 12, 2021.
Prior Publication US 2023/0421816 A1, Dec. 28, 2023
Int. Cl. H04N 19/70 (2014.01); H04N 19/176 (2014.01); H04N 19/46 (2014.01)
CPC H04N 19/70 (2014.11) [H04N 19/176 (2014.11); H04N 19/46 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A coefficient decoding method, comprising:
parsing an obtained bitstream, and decoding syntax elements of a to-be-decoded coefficient; and
determining a value of the to-be-decoded coefficient according to the syntax elements obtained by decoding,
wherein the syntax elements comprise: a non-zero flag, M flags in which an absolute value is greater than Xi, a modulo result flag, a remainder value, and a sign flag; an absolute value of the to-be-decoded coefficient is a sum obtained by adding a sum of an encoded value of the non-zero flag, encoded values of the M flags in which the absolute value is greater than Xi, and a preset numerical value corresponding to an encoded value of the modulo result flag, to a product of an encoded value of the remainder value and N; the value of the to-be-decoded coefficient is a value determined according to the absolute value of the to-be-decoded coefficient and the sign flag indicating a positive or negative characteristic; the encoded value of the modulo result flag is determined according to a modulo operation of the coefficient on N, i≥M, i and M are positive integers, N is a positive integer greater than 1, Xi is a positive integer, and when values of i are different, values of Xi are different and incremental with the values of i.