Patent SG-11201905527U-A (SG)
Title: Multi channel decoding
Inventor: CHEBIYYAM VENKATA SUBRAHMANYAM CHANDRA SEKHAR
IPC: G10L19/022
Filed: 2018-01-31
Abstract: 364 Window and Overlap- Add 380 Stereo Cues L 162 Right Channel 366 /- 382 1 128 Window and Overlap- Add 126 Left Channel 164 Side-Band Bitstream 1.- Side-Band Decoder i 180 x 172 182 r 308 Transform 184, 186 [ 118 Up-Mixer Window 1 173 Stereo Parameter Interpolator r 306 355 352f r 172 354 r 309 Window Transform r 304 Mid-Band Bitstream Mid-Band Decoder \ ► _ 166 360 314 /362 f 316 Inverse Transform FIG. 3 Inverse Transform O 00 O O (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 09 August 2018 (09.08.2018) WIPO I PCT ill IIIIIl °mons °nolo DID Mo mil 110 111110 oimIE (10) International Publication Number WO 2018/144590 Al (51) International Patent Classification: GlOL 19/008 (2013.01) GlOL 19/022 (2013.01) (21) International Application Number: PCT/US2018/016216 (22) International Filing Date: 31 January 2018 (31.01.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/454,652 03 February 2017 (03.02.2017) US 15/884,136 30 January 2018 (30.01.2018) 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; 5775 Morehouse Drive, San Diego, California 92121-1714 (US). ATTI, Venkatraman; 5775 Morehouse Drive, San Diego, California 92121-1714 (US). (74) Agent: TOLER, JEFFREY G.; 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, (54) Title: MULTI CHANNEL DECODING (57) : A method includes generating a windowed time-domain mid channel by applying two first asymmetric windows to a first frame of a time-domain mid channel and applying two second asymmetric windows to a second frame of the time-domain mid channel. The method includes transforming the windowed time-domain mid channel to a transform domain to generate sets of transform-domain mid channel data including first transform-domain mid channel data corresponding to a first mid channel window of the first frame and second transform-domain mid channel data corresponding to a second mid channel window of the first frame. The method includes performing an up-mix operation using the sets of transform-domain mid channel data, stereo parameters from the bit stream, and an interpolated parameter determined using an unevenly weighted interpolation between a first stereo parameter value associated with the first frame and a second stereo parameter value associated with the second frame. [Continued on next page] WO 2018/144590 Al MIDEDIMOMMIONER13010MOIVINEDIMOVOIS 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. (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))