Patent SG-11201407255X-A (SG)
Title: Stereo widening over arbitrarily-configured loudspeakers
Inventor: VERITY STEVEN
IPC: H04S3/00
Filed: 2013-05-29
Abstract: (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 5 December 2013 (05.12.2013) WIPOIPCT (10) International Publication Number WO 2013/181172 A1 (51) International Patent Classification: H04S3/00 (2006.01) (21) International Application Number: (22) International Filing Date: (25) Filing Language: (26) Publication Language: PCT/US2013/042953 29 May 2013 (29.05.2013) English English (30) Priority Data: 61/652,813 29 May 2012 (29.05.2012) (71) Applicant: CREATIVE TECHNOLOGY LTD [SG/SG]; 31 International Business Park #03-01, Creative Resource, 609921 Singapore (SG). (72) Inventors; and (71) Applicants (for US only): YANG, Jun [US/US]; 1144 Little John Way, San Jose, CA 95129 (US). RIDDER, Robert [NL/US]; 2339 Muriel Drive, Santa Cruz, CA 95062 (US). VERITY, Steven [US/US]; 623 Los Padres Blvd., Santa Clara, CA 95050 (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, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, 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, 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. Ug (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, 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)) (74) Agents: GEAN, Desmund et al.; Creative Labs, Inc., (Leg­ al Department), 1901 McCarthy Boulevard, Milpitas, CA 95035 (US). (54) Title: STEREO WIDENING OVER ARBITRARILY-CONFIGURED LOUDSPEAKERS J 00 = Left 101a f f » » 102 I L1 L1 103a 104 / L2 105a Left 101a Elevation Processing 103a Side Signal Processing L2 105a = Elevation Processing Side Signal Processing S * Elevation Processing \ * Side Signal Processing \ * i-H Right 101b R1 103b R2 105b 106 I Center Signal Processing L3 107a 108 I L4 109a 110 / L5 111a I I „ „ L3 107a Binaural Stereo Limiter L5 111a Signal Processing Stereo Limiter S * Signal Processing s * S * R3 107b R4 109b R5 111b CJ l> 00 i-H en i-H o CJ o & Figure 1 (57) Abstract: A system and method are disclosed for effective and simple stereo widening over arbitrarily-configured speakers and its real-time implementation. According to one embodiment, the system includes five processing units: (1) elevation processing unit; (2) side signal or difference signal processing unit; (3) center signal processing unit; (4) binaural signal processing unit; and (5) ste­ reo limiter (to prevent the clipping) unit. Any of the five processing units may be included or omitted depending on the application. In general, embodiments of the present invention provide effective and simple stereo widening schemes with good audio quality res - ults, but without having substantial requirements on the speakers' positional configuration. For example, the proposed schemes can apply to both symmetric and non-symmetric stereo loudspeakers.