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Machine translation
1. (WO2000025298) A METHOD AND DEVICE FOR ADAPTIVE BANDWIDTH PITCH SEARCH IN CODING WIDEBAND SIGNALS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2000/025298    International Application No.:    PCT/CA1999/001008
Publication Date: 04.05.2000 International Filing Date: 27.10.1999
Chapter 2 Demand Filed:    28.04.2000    
IPC:
G10L 19/00 (2006.01), G10L 21/02 (2006.01)
Applicants: VOICEAGE CORPORATION [CA/CA]; Suite 200, 750, Chemin Lucerne, Ville Mont-Royal, Quebec H3R 2H6 (CA) (For All Designated States Except US).
BESSETTE, Bruno [CA/CA]; (CA) (For US Only).
SALAMI, Redwan [CA/CA]; (CA) (For US Only).
LEFEBVRE, Roch [CA/CA]; (CA) (For US Only)
Inventors: BESSETTE, Bruno; (CA).
SALAMI, Redwan; (CA).
LEFEBVRE, Roch; (CA)
Agent: DUBUC, Jean, H.; Goudreau Gage Dubuc, The Stock Exchange Tower, Suite 3400, 800 Place Victoria, Montreal, Quebec H4Z 1E9 (CA)
Priority Data:
2,252,170 27.10.1998 CA
Title (EN) A METHOD AND DEVICE FOR ADAPTIVE BANDWIDTH PITCH SEARCH IN CODING WIDEBAND SIGNALS
(FR) PROCEDE ET DISPOSITIF DE RECHERCHE ADAPTATIVE DE LA HAUTEUR DE LARGEUR DE BANDE DANS LE CODAGE DE SIGNAUX A LARGE BANDE
Abstract: front page image
(EN)An improved pitch search method and device for digitally encoding a wideband signal, in particular but not exclusively a speech signal, in view of transmitting, or storing, and synthesizing this wideband sound signal. The new method and device which achieve efficient modeling of the harmonic structure of the speech spectrum uses several forms of low pass filters applied to a pitch codevector, the one yielding higher prediction gain (i.e. the lowest pitch prediction error) is selected and the associated pitch codebook parameters are forwarded.
(FR)L'invention concerne un procédé amélioré de recherche de hauteur et un dispositif de codage numérique d'un signal à large bande, en particulier mais pas exclusivement un signal vocal, en vue de transmettre ou de stocker, et de synthétiser ce signal sonore à large bande. Le procédé et le dispositif nouveaux, lesquels permettent une modélisation efficace de la structure harmonique du spectre de la parole, utilisent plusieurs formes de filtres passe-bas appliqués à un vecteur de code de hauteur, celui permettant d'obtenir le gain de prédiction le plus haut (c'est-à-dire l'erreur de prédiction de hauteur la plus faible) est sélectionné et les paramètres de code de hauteur associés sont retransmis.
Designated States: AE, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CR, CU, CZ, DE, DK, DM, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)