FirstLoudspeaker Second Output Channel 128 Second Loudspeaker 144 First Audio Channel 130 (\'Reference Channel\') Second Audio Channel 132 (Target Channel\') Second Microphone 148 First Microphone 146 Modified Non Harmonic HB Flag (y) 920 Down-Mix Bitstream 216 ICBWE Bitstream 242 High-Band Mid Channel Bitstream 244 Low-Band Bitstream 246 Modified Non Harmonic FIB Flag (y) 920 Down-Mix Bitstream 216 ICBWE Bitstream 242 High-Band Mid Channel Bitstream 244 Low-Band Bitstream 246 100 First Output Channel 126 First Device 104 Memory 153 Instructions 191 Transmitter 110 Input I nterface(s) 112 Encoder 200 Inter-Channel BWE Encoder 204 Non Harmonic HB Flag (x) 910 Modified Non Harmonic HB Flag (y) 920 ( 106 Second Device Decoder 300 I ICBWE Decoder 306 I Modified Non Harmonic HB Flag (y) 920 (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 25 October 2018 (25.10.2018) WIP0 I PCT ill IIIIIl °million °nolo mu imm Eno iflo oimIE (10) International Publication Number WO 2018/195299 Al (51) International Patent Classification: G1OL 19/008 (2013.01) G1OL 21/038 (2013.01) G1OL 19/02 (2013.01) (21) International Application Number: PCT/US2018/028338 (22) International Filing Date: 19 April 2018 (19.04.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/488,654 21 April 2017 (21.04.2017) US 15/956,645 18 April 2018 (18.04.2018) US (71) Applicant: QUALCOMM INCORPORATED [US/US]; ATTN: International IP Administration, 5775 Morehouse Drive, San Diego, California 92121-1714 (US). (72) Inventors: CHEBIYYAM, Venkata Subrahmanyam Chandra Sekhar; 590 Mill Creek Lane, #205, Santa Clara, California 95054 (US). ATTI, Venkatraman; 5775 More- house Drive, San Diego, California 92121-1714 (US). (74) Agent: TOLER LAW GROUP, PC et al.; 8500 Bluffstone Cove, Suite A201, Austin, Texas 78759 (US). (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. (54) Title: NON-HARMONIC SPEECH DETECTION AND BANDWIDTH EXTENSION IN A MULTI-SOURCE ENVIRON- = MENT FIG. 1 M Sound Source152 (57) : A device includes a multi-channel encoder configured to receive a first audio signal and a second audio signal, to perform a downmix operation on the first audio signal and the second audio signal to generate a mid signal, to generate a low-band mid signal and a high-band mid signal based on the mid signal, and to determine, based at least partially on a low band voicing value corresponding to the low band signal and a gain value corresponding to the high-band mid signal, a value of a multi-source flag that 00 flag associated with the high-band mid signal. The multi-channel encoder is configured to generate a high-band mid excitation signal O based on the multi-source flag and to generate a bitstream based on the high-band mid excitation signal. The device also includes a transmitter configured to transmit the bitstream and the multi-source flag to a second device. C [Continued on next page] WO 2018/195299 Al OII (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, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3))
NON-HARMONIC SPEECH DETECTION AND BANDWIDTH EXTENSION IN A MULTI-SOURCE ENVIRONMENT