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Machine translation
1. (WO2005119649) SYSTEM AND METHOD FOR BABBLE NOISE DETECTION
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2005/119649    International Application No.:    PCT/IB2005/001247
Publication Date: 15.12.2005 International Filing Date: 09.05.2005
Chapter 2 Demand Filed:    24.03.2006    
IPC:
G10L 11/02 (2006.01)
Applicants: NOKIA CORPORATION [FI/FI]; Keilalahdentie 4, FIN-02150 ESPOO (FI) (For All Designated States Except US).
NOKIA INC. [US/US]; 6000 Connection Drive, Irving, TX 75039 (US) (LC only).
LAAKSONEN, Laura [FI/FI]; (FI) (For US Only).
VALVE, Paivi [FI/FI]; (FI) (For US Only)
Inventors: LAAKSONEN, Laura; (FI).
VALVE, Paivi; (FI)
Agent: ALBERT, Jr., G., Peter; Foley & Lardner LLP, 11250 El Camino Real, Suite 200, San Diego, CA 92130 (US)
Priority Data:
10/853,819 25.05.2004 US
Title (EN) SYSTEM AND METHOD FOR BABBLE NOISE DETECTION
(FR) SYSTEME ET PROCEDE DE DETECTION DE MURMURES CONFUS
Abstract: front page image
(EN)A method, device, system, and computer program product calculate a gradient index as a sum of magnitudes of gradients of speech signals from a received frame at each change of direction; and provide an indication that the frame contains babble noise if the gradient index, energy information, and background noise level exceed pre-determined thresholds or a voice activity detector algorithm and sound level indicate babble noise. The gradient index is calculated as a sum of magnitudes of gradients of speech signals from the received input signal at each change of direction. The energy information measures how often a value is considerable high, which is based on the division of the second derivative energy by the energy of the signal.
(FR)Un procédé, un dispositif, un système et un programme informatique calculent un indice de gradient tenant lieu de somme de magnitudes de gradients de signaux de vitesse à partir d'une trame reçue à chaque changement de direction et indiquent que la trame contient un murmure confus si l'indice de gradient, l'information d'énergie et le niveau de bruit de fond dépassent les seuils prédéterminés ou qu'un algorithme détecteur de l'activité vocale et le niveau sonore indiquent un murmure confus. L'indice de gradient est calculé comme la somme des magnitudes des gradients des signaux de vitesse provenant du signal d'entrée reçu à chaque changement de direction. L'information d'énergie mesure à quelle fréquence une valeur est considérablement élevée d'après la division de la seconde énergie dérivée par l'énergie du signal.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, MC, NL, PL, PT, RO, SE, SI, SK, 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)