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Pub. No.: WO/2010/121903 International Application No.: PCT/EP2010/054602
Publication Date: 28.10.2010 International Filing Date: 07.04.2010
IPC:
G10L 11/04 (2006.01) ,G10L 19/00 (2006.01)
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
L
SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
11
Determination or detection of speech or audio characteristics not restricted to a single one of groups G10L15/-G10L21/155
04
Pitch determination of speech signals
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
L
SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
19
Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
Applicants: SUN, Xuejing[CN/US]; US (UsOnly)
Cambridge Silicon Radio Limited[GB/GB]; Churchill House Cambridge Business Park Cowley Road Cambridge CB4 0WZ, GB (AllExceptUS)
GADRE, Sameer[CA/US]; US (AllExceptUS)
Inventors: SUN, Xuejing; US
Agent: SLINSGBY, Philip, Roy; Page White & Farrer Bedford House John Street London Greater London WC1N 2BF, GB
Priority Data:
12/427,00421.04.2009US
Title (EN) Pitch Estimation
(FR) ESTIMATION DE LA FONDAMENTALE
Abstract:
(EN) A method and apparatus for estimating the pitch period of a signal. The method comprises identifying a first candidate pitch period by performing a search only over a first range of potential pitch periods. The method further comprises determining a second candidate pitch period by dividing the first candidate pitch period by an integer, wherein the second candidate pitch period is outside the first range of potential pitch periods. The method further comprises selecting as the estimate of the pitch period of the signal the smaller of the candidate pitch periods that is such that portions of the signal separated by that candidate pitch period are well correlated.
(FR) L'invention porte sur un procédé et sur un appareil pour estimer la période de la fondamentale d'un signal. Le procédé comprend l'identification d'une première période de la fondamentale candidate par réalisation d'une recherche uniquement sur une première plage de périodes de la fondamentale potentielles. Le procédé comprend la détermination d'une seconde période de la fondamentale candidate par division de la première période de la fondamentale candidate par un entier, la seconde période de la fondamentale candidate se trouvant hors de la première plage de période de la fondamentale potentielle. Le procédé comprend en outre la sélection, en tant qu'estimation de la période de la fondamentale du signal, de la plus petite des périodes de la fondamentale candidates de telle sorte que des parties du signal séparées par cette période de la fondamentale candidate seront bien corrélées.
front page image
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, 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, KM, 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, PE, PG, PH, PL, PT, RO, RS, RU, 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
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (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, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)