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1. (WO2010075895) PARAMETRIC AUDIO CODING
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2010/075895 International Application No.: PCT/EP2008/068371
Publication Date: 08.07.2010 International Filing Date: 30.12.2008
IPC:
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
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:
NOKIA CORPORATION; Keilalahdentie 4 FI-02150 Espoo, FI (AllExceptUS)
OJANPERÄ, Juha Petteri [FI/FI]; FI (UsOnly)
Inventors:
OJANPERÄ, Juha Petteri; FI
Agent:
COHAUSZ & FLORACK; Bleichstrasse 14 40211 Düsseldorf, DE
Priority Data:
Title (EN) PARAMETRIC AUDIO CODING
(FR) CODAGE AUDIO PARAMÉTRIQUE
Abstract:
(EN) It is disclosed to determine whether a gain should be applied to at least one frequency subband of a reconstructed first channel audio signal frame or to at least one frequency subband of a reconstructed second channel audio signal frame, wherein said reconstructed first and second channel audio signal frame are obtainable by decoding a parametrically encoded audio signal representing an audio signal frame pair comprising a first channel audio signal frame and a second channel audio signal frame, based on a first parameter indicative of a perceived direction of the audio signal frame pair and at least one preceding audio signal frame pair and on a set of second parameters, each second parameter indicative of a perceived direction of a frequency subband of the audio signal frame pair.
(FR) L'invention vise à déterminer si un gain devrait être appliqué à au moins une sous-bande de fréquence d'une trame de signal audio de premier canal reconstruite ou à au moins une sous-bande de fréquence d'une trame de signal audio de second canal reconstruite, lesdites trames de signal audio de premier et second canaux reconstruites pouvant être obtenues par décodage d'un signal audio codé de façon paramétrique représentant une paire de trames de signal audio comprenant une trame de signal audio de premier canal et une trame de signal audio de second canal, sur la base d'un premier paramètre indicatif d'une direction perçue de la paire de trames de signal audio et d'au moins d'une paire de trames de signal audio précédente et sur la base d'un ensemble de seconds paramètres, chaque second paramètre étant indicatif d'une direction perçue d'une sous-bande de fréquence de la paire de trames de signal audio.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, 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, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, 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, 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, HR, HU, IE, IS, IT, LT, LU, LV, MC, MT, NL, NO, 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)