(51) International Patent Classification: G10L 25/18 (2013.01) G10L 19/038 (2013.01) G10L 19/008 (2013.01) G10L 19/02 (2013.01) G10L 19/00 (2013.01) (21) International Application Number: (22) International Filing Date: (25) Filing Language: (84) Designated States (unless otherwise indicated, for every kind of regional protection available) . ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, Cl, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3)) — before the expiration of the time limit for amending the claims and to be republished in the event of receipt of amendments (Rule 48.2(h)) (26) Publication Language: (30) Priority Data: 181 1071.8 05 July 2018 (05.07.2018) GB (71) Applicant: NOKIA TECHNOLOGIES OY [FI/FI]; Karakaari 7, 02610 Espoo (FI). (72) Inventors: VASILACHE, Adriana; Vestonkatu43, 33580 Tampere (FI). RAMO, Anssi; Velholehdenkatu 9, 33720 Tampere (FI). LAAKSONEN, Lasse; Nasilinnankatu 23 B 28, 33210 Tampere (FI). (74) Agent: NOKIA TECHNOLOGIES OY et al.; Ari Aamio, IPR Department, Karakaari 7, 02610 Espoo (FI). (81) Designated States (unless otherwise indicated, for every kind of national protection available) : AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY,MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. PCT/FI20 19/050484 20 June 2019 (20.06.2019) English English (54) Title: DETERMINATION OF SPATIAL AUDIO PARAMETER ENCODING AND ASSOCIATED DECODING (57) Abstract: An apparatus comprising means forreceiving values for sub-bandsof a frameof an audio signal, the values comprising at least one azimuth value, at least one elevation value and at least one energy ratio value for each sub-band;determining an allocation of first number of bits to encode the valuesof theframe, wherein the first number of bits are fixed;encoding the at least one energy ratio valuefor a frame based on a defined allocation of a second number of bits from the first number of bits;encoding the at least one azimuth value and/or at least one elevation valueof theframebased on a defined allocation of a third number of bits from the first number of bits, wherein thethird number of bits is variably distributed on a sub- band-by-sub-band basis.