WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
PATENTSCOPE will be unavailable a few hours for maintenance reason on Saturday 18.08.2018 at 9:00 AM CEST
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO2001003116) METHODS AND DEVICE FOR AUDIO ANALYSIS AND SYNTHESIS
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2001/003116 International Application No.: PCT/FR2000/001904
Publication Date: 11.01.2001 International Filing Date: 04.07.2000
Chapter 2 Demand Filed: 10.01.2001
IPC:
G10L 19/02 (2013.01) ,G10L 19/10 (2013.01)
Applicants: CAPMAN, François[FR/FR]; FR (UsOnly)
MURGIA, Carlo[IT/US]; US (UsOnly)
MATRA NORTEL COMMUNICATIONS[FR/FR]; 50, rue du Président Sadate F-29100 Quimper, FR (AllExceptUS)
Inventors: CAPMAN, François; FR
MURGIA, Carlo; US
Agent: LOISEL, Bertrand ; Cabinet Plasseraud 84, rue d'Amsterdam F-75440 Paris Cedex 09, FR
Priority Data:
99/0863805.07.1999FR
Title (EN) METHODS AND DEVICE FOR AUDIO ANALYSIS AND SYNTHESIS
(FR) PROCEDES ET DISPOSITIFS D'ANALYSE ET DE SYNTHESE AUDIO
Abstract: front page image
(EN) The invention concerns a method which consists, for the analysis of an audio signal (x), in weighting samples of each frame of N samples through an analysis window of the Hamming, Hanning, Kaiser type or the like; calculating the audio signal spectrum by transforming each frame of weighted samples in the frequency domain; and in processing the spectrum of the audio signal to deliver synthesis parameters for a signal derived from an analysed audio signal. The successive frames for which complete sets of synthesis parameters are supplied advantageously have mutual overlaps of less than N/2 samples. During synthesis, the method consists in recovering the frames with an optional interpolation, and in reforming the signal by a frame overlapping sum, after having carried out an appropriate weighting of the samples.
(FR) Dans l'analyse du signal audio (x), on pondére les échantillons de chaque trame de N échantillons par une fenêtre d'analyse de type Hamming, Hanning, Kaiser ou analogue, on calcule un spectre du signal audio en transformant chaque trame d'échantillons pondérés dans le domaine fréquentiel, et on traite le spectre du signal audio pour délivrer des paramètres de synthèse d'un signal dérivé du signal audio analysé. Les trames successives pour lesquelles on délivre des jeux complets de paramètres de synthèse présentent avantageusement des recouvrements mutuels de moins de N/2 échantillons. A la synthèse, on récupère des trames avec une interpolation éventuelle, et on reforme le signal par une somme à recouvrement des trames, aprés avoir procédé à une pondération appropriée des échantillons.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CR, CU, CZ, DE, DK, DM, DZ, 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, MZ, 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 (ARIPO) (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (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: French (FR)
Filing Language: French (FR)