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1. (WO2018101868) PROCESSING OF AN AUDIO INPUT SIGNAL
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Pub. No.: WO/2018/101868 International Application No.: PCT/SE2016/051206
Publication Date: 07.06.2018 International Filing Date: 02.12.2016
IPC:
G10L 19/022 (2013.01) ,G10L 19/24 (2013.01) ,G10L 21/038 (2013.01) ,G10L 19/04 (2013.01) ,H04S 7/00 (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
02
using spectral analysis, e.g. transform vocoders or subband vocoders
022
Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
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
04
using predictive techniques
16
Vocoder architecture
18
Vocoders using multiple modes
24
Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
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
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
04
using predictive techniques
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
S
STEREOPHONIC SYSTEMS
7
Indicating arrangements; Control arrangements, e.g. balance control
Applicants:
DIRAC RESEARCH AB [SE/SE]; Vaksalagatan 16 753 20 Uppsala, SE
Inventors:
ARLBRANT, Mattias; SE
Agent:
AROS PATENT AB; Box 1544 SE-751 45 Uppsala, SE
Priority Data:
Title (EN) PROCESSING OF AN AUDIO INPUT SIGNAL
(FR) TRAITEMENT D'UN SIGNAL D'ENTRÉE AUDIO
Abstract:
(EN) There is provided a method for processing an audio input signal and a corresponding audio filter system. The method comprises applying (S1) non-linear time-domain processing to the input signal to generate a processed copy of the input signal, transforming (S2) the input signal and the processed copy of the input signal to the frequency domain, and performing (S3) a comparison in the frequency-domain based on the transformed input signal and the transformed processed copy of the input signal. The method also comprises determining (S4) at least one control parameter based on the comparison, performing (S5) frequency-domain processing of the transformed input signal based on the control parameter(s), and generating (S6) an output signal by transforming the frequency-domain processed signal to the time domain.
(FR) La présente invention concerne un procédé de traitement d'un signal d'entrée audio et un système de filtre audio correspondant. Le procédé comprend l'application (S1) d'un traitement non linéaire dans le domaine temporel au signal d'entrée pour générer une copie traitée du signal d'entrée, la transformation (S2) du signal d'entrée et de la copie traitée du signal d'entrée au domaine fréquentiel, et la réalisation (S3) d'une comparaison dans le domaine fréquentiel sur la base du signal d'entrée transformé et de la copie traitée transformée du signal d'entrée. Le procédé comprend également la détermination (S4) d'au moins un paramètre de commande sur la base de la comparaison, l'exécution (S5) d'un traitement de domaine fréquentiel du signal d'entrée transformé sur la base du paramètre ou des paramètres de commande, et la génération (S6) d'un signal de sortie par transformation du signal traité dans le domaine fréquentiel au domaine temporel.
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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, DJ, 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, KW, KZ, LA, LC, LK, LR, LS, 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, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (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)