Patent SG-11201806256S-A (SG)
Title: Apparatus and method for mdct m/s stereo with global ild with improved mid/side decision
Inventor: RAVELLI EMMANUEL
IPC: G10L19/22
Filed: 2017-01-20
Abstract: 120 first channel and second channel of audio input signal 11. encoding unit normalizer normalized audio signal encoded audio signal Fig. - 11 W O 20 17 / 1255 44 Al (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date WO 2017/125544 Al 27 July 2017 (27.07.2017) WIPO I PCT 111111111111110111011111111111010111110111011101111111111111111111111111111111110111111 (51) International Patent Classification: GlOL 19/008 (2013.01) G1 0L 19/02 (2013.01) G1 0L 19/22 (2013.01) (21) International Application Number: PCT/EP2017/051177 (22) International Filing Date: 20 January 2017 (20.01.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 16152457.4 22 January 2016 (22.01.2016) EP 16152454.1 22 January 2016 (22.01.2016) EP 16199895.0 21 November 2016 (21.11.2016) EP (71) Applicants: FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V. [DE/DE]; HansastraBe 27c, 80686 Miinchen (DE). FRIEDRICH-ALEXANDER-UNIVERSITAET ER- LANGEN-NUERNBERG [DE/DE] ; Schlossplatz 4, 91054 Erlangen (DE). (72) Inventors: RAVELLI, Emmanuel; Donato-Polli-Str. 58, 91056 Erlangen (DE). SCHNELL, Markus; Labenwolfstr. 15, 90409 Niimberg (DE). DOHLA, Stefan; Saidelsteig 61, 91058 Erlangen (DE). JAGERS, Wolfgang; Kul- mbacher StraBe 47, 91056 Erlangen (DE). DIETZ, Mar- tin; DeutschherrnstraBe 37, 90429 Niimberg (DE). HELMRICH, Christian; Fraunhoferstr. 21, 10587 Berlin (DE). MARKOVIC, Goran; Aachener StraBe 19, 90425 Niimberg (DE). FOTOPOULOU, Eleni; Berckhauserstr. 33, 90409 Niimberg (DE). MULTRUS, Markus; Etzlaub- weg 7, 90469 Niirnberg (DE). BAYER, Stefan; Dortmun- der Strasse 14, 90425 Niimberg (DE). FUCHS, Guil- laume; Joseph-Otto-Kolb-Str. 31, 91088 Bubenreuth (DE). HERRE, Jurgen; Rathsberger Str. 10a, 91054 Erlangen (DE). (74) Agents: SCHAIRER, Oliver et al.; Schoppe, Zimmer- maim, 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, 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). [Continued on next page] (54) Title: APPARATUS AND METHOD FOR MDCT M/S STEREO WITH GLOBAL ILD WITH IMPROVED MID/SIDE DE- CISION (57) : Fig. illustrates an apparatus for encoding a first channel and a second channel of an audio input signal comprising two or more channels to obtain an encoded audio signal according to an embodiment. The apparatus comprises a normalizer (110) configured to determine a normalization value for the audio input signal depending on the first channel of the audio input signal and depending on the second channel of the audio input signal, wherein the normalizer (110) is configured to determine a first channel and a second channel of a normalized audio signal by modifying, depending on the normalization value, at least one of the first channel and the second channel of the audio input signal. Moreover, the apparatus comprises an encoding unit (120) being con- figured to generate a processed audio signal having a first channel and a second channel, such that one or more spectral bands of the first channel of the processed audio signal are one or more spectral bands of the first channel of the normalized audio signal, such that one or more spectral bands of the second channel of the processed audio signal are one or more spectral bands of the second channel of the normalized audio signal, such that at least one spectral band of the first channel of the processed audio signal is a spectral band of a mid signal depending on a spectral band of the first channel of the normalized audio signal and depending on a spectral band of the second channel of the normalized audio signal, and such that at least one spectral band of the second channel of the processed audio signal is a spectral band of a side signal depending on a spectral band of the first channel of the normalized au - dio signal and depending on a spectral band of the second channel of the normalized audio signal. The encoding unit (120) is con- figured to encode the processed audio signal to obtain the encoded audio signal. WO 2017/125544 Al 1#11101M011010112010EMOMOHOVEM10011111111111110110111111 Published: — before the expiration of the time limit for amending the — with international search report (Art. 21(3)) claims and to be republished in the event of receipt of amendments (Rule 48.2(h))