US 12,348,790 B2
Entropy encoding and decoding apparatus and method for using the same
Yinji Piao, Suwon-si (KR); Kyungah Kim, Suwon-si (KR); Minsoo Park, Suwon-si (KR); Minwoo Park, Suwon-si (KR); and Kwangpyo Choi, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Mar. 20, 2023, as Appl. No. 18/123,623.
Application 18/123,623 is a continuation of application No. PCT/KR2023/003261, filed on Mar. 9, 2023.
Claims priority of application No. 10-2022-0042526 (KR), filed on Apr. 5, 2022; and application No. 10-2022-0114368 (KR), filed on Sep. 8, 2022.
Prior Publication US 2023/0319319 A1, Oct. 5, 2023
Int. Cl. H04N 19/70 (2014.01); H04N 19/174 (2014.01); H04N 19/91 (2014.01)
CPC H04N 19/91 (2014.11) [H04N 19/174 (2014.11); H04N 19/70 (2014.11)] 15 Claims
OG exemplary drawing
 
1. An entropy decoding method comprising:
obtaining, from a bitstream, information about a slice type;
based on an occurrence probability of a symbol, performing arithmetic decoding on a current symbol corresponding to a syntax element;
based on the slice type indicating an I slice, determining a first scaling factor for updating the occurrence probability of the symbol by using a first function, wherein a value of the first function is determined based on a count value and a first threshold value;
based on the slice type indicating a B or P slice, determining the first scaling factor by using a second function, wherein a value of the second function is determined based on the count value and a second threshold value; and
by using the first scaling factor, updating the occurrence probability of the symbol,
wherein the first threshold value is greater than or equal to the second threshold value,
wherein the count value indicates a number of times a symbol corresponding to the syntax element has been previously arithmetic-decoded.