(19)

(11)

EP 4 158 899 A1

(12)

(43) Date of publication: 05.04.2023 Bulletin 2023/14 (21) Application number: 20937809.0 (22) Date of filing: 29.05.2020

(51) International Patent Classification (IPC):  H04R 1/10(2006.01) H04N 21/433(2011.01) (52) Cooperative Patent Classification (CPC): H04R 1/1083; H04R 2460/01; G10K 11/17827; G10K 11/17837; H04N 21/42203; H04N 21/4394; H04N 21/4318; H04N 21/466; G10L 25/30; G10L 25/51; G10L 21/0216; G10K 2210/3038; G10K 2210/3051; G10K 2210/1081; G10K 11/17885 (86) International application number: PCT/CN2020/093172 (87) International publication number: WO 2021/237650 (02.12.2021 Gazette 2021/48)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (71) Applicant: Nokia Technologies Oy 02610 Espoo (FI)	(72) Inventors: XIAO, Zhen Beijing 100091 (CN) CHEN, Xiaoqi Guangzhou, Guangdong 510000 (CN) (74) Representative: Nokia EPO representatives  Nokia Technologies Oy Karakaari 7 02610 Espoo 02610 Espoo (FI)