US 12,294,741 B2
Decoding based on bi-directional picture condition
Martin Pettersson, Vallentuna (SE); Ruoyang Yu, Täby (SE); Rickard Sjöberg, Stockholm (SE); Mitra Damghanian, Upplands-Bro (SE); Zhi Zhang, Solna (SE); and Jack Enhorn, Kista (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/907,704
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Mar. 30, 2021, PCT No. PCT/SE2021/050286
§ 371(c)(1), (2) Date Sep. 29, 2022,
PCT Pub. No. WO2021/201759, PCT Pub. Date Oct. 7, 2021.
Claims priority of provisional application 63/004,051, filed on Apr. 2, 2020.
Prior Publication US 2023/0137221 A1, May 4, 2023
Int. Cl. H04N 19/70 (2014.01); H04N 19/159 (2014.01); H04N 19/169 (2014.01)
CPC H04N 19/70 (2014.11) [H04N 19/159 (2014.11); H04N 19/188 (2014.11)] 16 Claims
OG exemplary drawing
 
1. A method for decoding a segment in a coded picture from a bitstream, the method comprising:
decoding a first codeword from a picture header structure included in a picture header network abstraction layer (NAL) unit in the bitstream to obtain a value of the first codeword, wherein the picture header structure is associated with the coded picture and the value of the first codeword indicates whether the coded picture may contain bi-directional inter coded segments or not;
decoding a fourth codeword from the bitstream to obtain a value of the fourth codeword, wherein the value of the fourth codeword indicates that the picture header structure associated with the coded picture is to be decoded from a picture header NAL unit that is different from a NAL unit of the segment;
based on the value of the first codeword and the fourth codeword, deriving one or more parameter values by either (a) decoding one or more parameters from the picture header structure associated with the coded picture to obtain the one or more parameter values or (b) inferring the one or more parameter values; and
decoding the segment in the coded picture based on the one or more parameter values.