Patent SG-11201806241Q-A (SG)
Title: Apparatus and method for estimating an inter-channel time difference
Inventor: BAYER STEFAN
IPC: G10L19/02
Filed: 2017-01-20
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 27 July 2017 (27.07.2017) WIPO I PCT (10) International Publication Number WO 2017/125563 Al 1111111111111101110111111111110101111101110111011111111111111011011111111111110111111 left/first channel signal second/right channel signal (51) International Patent Classification: G10L 19/008 (2013.01) GlOL 19/02 (2013.01) (21) International Application Number: PCT/EP2017/051214 (22) International Filing Date: 20 January 2017 (20.01.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 16152453.3 22 January 2016 (22.01.2016) EP 16152450.9 22 January 2016 (22.01.2016) EP (71) Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V. [DE/DE]; HansastraBe 27c, 80686 Miinchen (DE). (72) Inventors: BAYER, Stefan; Dortmunder Str. 14, 90425 Niirnberg (DE). FOTOPOULOU, Eleni; Berckhauserstr. 33, 90409 Niirnberg (DE). MULTRUS, Markus; Etzlaub- weg 7, 90469 Niirnberg (DE). FUCHS, Guillaume; Joseph-Otto-Kolb-Str. 31, 91088 Bubenreuth (DE). RAV- ELLI, Emmanuel; Gerhart-Hauptmann-Str. 1, 91058 Er- langen (DE). SCHNELL, Markus; Labenwolfstr. 15, 90409 Niirnberg (DE). DOHLA, Stefan; Saidelsteig 61, 91058 Erlangen (DE). JAGERS, Wolfgang; Kulmbacher Str. 47, 91056 Erlangen (DE). DIETZ, Martin; Deutsch- herrnstr. 37, 90429 Niirnberg (DE). MARKOVIC, Goran; Aachener Str. 19, 90425 Niirnberg (DE). (74) Agents: ZINKLER, Franz et al.; Schoppe, Zimmermann, Stockeler, Zinkler, Schenk & Partner mbB, Radlkoferstr.2, 81373 Miinchen (DE). (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, JP, KE, KG, KH, KN, [Continued on next page] (54) Title: APPARATUS AND METHOD FOR ESTIMATING AN INTER-CHANNEL TIME DIFFERENCE (57) : An apparatus for estimating an inter-channel time difference between a first channel signal and a second channel sig - nal, comprises: a calculator (1020) for calculating a cross- correla- tion spectrum for a time block from the first channel signal in the time block and the second channel signal in the time block; a spec time-spectral converter 150 (451) tral characteristic estimator (1010) for estimating a characteristic of a spectrum of the first channel signal or the second channel signal for the time block; a smoothing filter (1030) for smoothing the cross-correlation spectrum over time using the spectral character- istic to obtain a smoothed cross- correlation spectrum; and a pro- cessor (1040) for processing the smoothed cross- correlation spec- trum to obtain the inter-channel time difference. spectral character'stic estimator (noisiness/ onality/...) cross-correlation spectrum calculator 1020 (452) -- --- W O 20 17 / 1255 63 Al 030 cross-correlation 1010 (455) e. g. SFM spectrum (453, of current block 454) cross-correlation spectrum of last block smoothing filter smoothed cross-correlation spectrum 1040-- processor (456-459) I inter-channel time difference Fig. 10a WO 2017/125563 Al MIDEDIMOMOIDEIR010130HOMMOODEVOIS 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. (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))