Patent SG-11201408677Y-A (SG)
Title: Linear prediction based audio coding using improved probability distribution estimation
Inventor: BÄCKSTRÖM TOM
IPC: G10L19/08
Filed: 2013-06-19
Abstract: (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 3 January 2014 (03.01.2014) WIPOIPCT (10) International Publication Number WO 2014/001182 A1 (51) International Patent Classification: G10L 19/032 (2013.01) G10L 19/08 (2013.01) (21) International Application Number: (22) International Filing Date: (25) Filing Language: (26) Publication Language: PCT/EP2013/062809 19 June 2013 (19.06.2013) English English (30) Priority Data: 61/665,485 28 June 2012 (28.06.2012) (71) Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V. [DE/DE]; HansastraBe 27c, 80686 Miinchen (DE). (72) Inventors: BACKSTROM, Tom; Bauerngasse 8-12, 90443 Nurnberg (DE). HELMRICH, Christian; HauptstraBe 68, 91054 Erlangen (DE). FUCHS, Guil- laume; Further StraBe 17, 91058 Erlangen (DE). MUL- TRUS, Markus; Etzlaubweg 7, 90469 Nurnberg (DE). DI- ETZ, Martin; DeutschherrnstraBe 37, 90429 Nurnberg (DE). (74) Agents: SCHENK, Markus et al.; P.O. Box 246, 82043 Pullach (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, 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)) — before the expiration of the time limit for amending the claims and to be republished in the event of receipt of amendments (Rule 48.2(h)) (54) Title: LINEAR PREDICTION BASED AUDIO CODING USING IMPROVED PROBABILITY DISTRIBUTION ESTIMA­ TION CJ 00 20 -U pre-emphasis Y spec deter trum niner quantization and entropy encoding stage LP analyzer probability distribution estimator —12 data stream o o o CJ O & FIG 1 (57) Abstract: Linear prediction based audio coding is improved by coding spectrum composed a of a plurality of spectral compon­ ents using a probability distribution estimation determined for each of the plurality of spectral components from linear prediction coefficient information. In particular, the linear prediction coefficient information is available anyway. Accordingly, it may be used for determining the probability distribution estimation at both encoding and decoding side. The latter determination may be imple - mented in computationally simple manner a by using, for example, an appropriate parameterization for the probability distribution estimation at the plurality of spectral components. All together, the coding efficiency as provided by the entropy coding is compat - ible with probability distribution estimations as achieved using context selection, but its derivation less complex. For example, is the derivation may be purely analytically and/or does not require any information on attributes of neighboring spectral lines such as pre­ viously coded/decoded spectral values of neighboring spectral lines as the is case in spatial context selection.