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1. (WO2015010948) APPARATUS AND METHOD FOR ENCODING OR DECODING AN AUDIO SIGNAL WITH INTELLIGENT GAP FILLING IN THE SPECTRAL DOMAIN
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2015/010948 International Application No.: PCT/EP2014/065109
Publication Date: 29.01.2015 International Filing Date: 15.07.2014
Chapter 2 Demand Filed: 22.05.2015
IPC:
G10L 19/02 (2013.01) ,G10L 21/038 (2013.01)
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
02
using spectral analysis, e.g. transform vocoders or subband vocoders
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
L
SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
21
Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
02
Speech enhancement, e.g. noise reduction or echo cancellation
038
using band spreading techniques
Applicants:
FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. [DE/DE]; Hansastraße 27c 80686 München, DE
Inventors:
DISCH, Sascha; DE
NAGEL, Frederik; DE
GEIGER, Ralf; DE
THOSHKAHNA, Balaji Nagendran; DE
SCHMIDT, Konstantin; DE
BAYER, Stefan; DE
NEUKAM, Christian; DE
EDLER, Bernd; DE
HELMRICH, Christian; DE
Agent:
ZINKLER, Franz; DE
Priority Data:
13177346.722.07.2013EP
13177348.322.07.2013EP
13177350.922.07.2013EP
13177353.322.07.2013EP
13189362.018.10.2013EP
Title (EN) APPARATUS AND METHOD FOR ENCODING OR DECODING AN AUDIO SIGNAL WITH INTELLIGENT GAP FILLING IN THE SPECTRAL DOMAIN
(FR) APPAREIL OU PROCÉDÉ D'ENCODAGE OU DÉCODAGE D'UN SIGNAL AUDIO AVEC REMPLISSAGE D'ESPACE INTELLIGENT DANS LE DOMAINE SPECTRAL
Abstract:
(EN) An apparatus for decoding an encoded audio signal, comprises a spectral domain audio decoder (112) for generating a first decoded representation of a first set of first spectral portions, the decoded representation having a first spectral resolution; a parametric decoder (114) for generating a second decoded representation of a second set of second spectral portions having a second spectral resolution being lower than the first spectral resolution; a frequency regenerator (116) for regenerating every constructed second spectral portion having the first spectral resolution using a first spectral portion and spectral envelope information for the second spectral portion; and a spectrum time converter (118) for converting the first decoded representation and the reconstructed second spectral portion into a time representation.
(FR) L'invention concerne un appareil de décodage d'un signal audio encodé, comprenant un décodeur audio de domaine spectral (112) permettant de générer une première représentation décodée d'un premier jeu de premières portions spectrales, la représentation décodée ayant une première représentation spectrale; un décodeur paramétrique (114) permettant de générer une seconde représentation décodée d'un second jeu de secondes portions spectrales ayant une seconde résolution spectrale inférieure à la première résolution spectrale; un générateur de fréquence (116) permettant de régénérer chaque seconde portion spectrale construite ayant la première résolution spectrale en utilisant une première portion spectrale et des informations d'enveloppe spectrale pour la seconde portion spectrale; et un convertisseur de temps de spectre (118) permettant de convertir la première représentation décodée et la seconde portion spectrale reconstruite en une représentation de temps.
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Designated States: 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, IR, 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, SA, 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, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (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)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)