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1. (WO2017151736) SYSTEMS AND METHODS FOR CONTROLLING ADAPTIVE NOISE CONTROL GAIN
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Pub. No.: WO/2017/151736 International Application No.: PCT/US2017/020149
Publication Date: 08.09.2017 International Filing Date: 01.03.2017
IPC:
G10K 11/178 (2006.01)
G PHYSICS
10
MUSICAL INSTRUMENTS; ACOUSTICS
K
SOUND-PRODUCING DEVICES;  METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
11
Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
16
Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
175
using interference effects; Masking sound
178
by electro-acoustically regenerating the original acoustic waves in anti-phase
Applicants:
CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR, LTD. [GB/GB]; 7B Nighengale Way Quartermile Edinburgh Lothian EH3 9EG, GB
ALDERSON, Jeffrey, D. [US/US]; US
Inventors:
HENDRIX, Jon, D.; US
CHO, Sang-Ik, Terry; US
YONG, Chin, Huang; US
MELANSON, John, L.; US
Agent:
PREWITT, Brian, K.; US
DEWAN, Raman, N.; US
LALLY, Joseph, P.; US
Priority Data:
15/058,86602.03.2016US
Title (EN) SYSTEMS AND METHODS FOR CONTROLLING ADAPTIVE NOISE CONTROL GAIN
(FR) SYSTÈMES ET PROCÉDÉS DE COMMANDE DE GAIN DE RÉGULATION DE BRUIT ADAPTATIF
Abstract:
(EN) A method may include adaptively generating an anti-noise signal for countering the effects of ambient audio sounds at an acoustic output of the transducer by adapting a response of an adaptive filter that filters a reference microphone signal in conformity with an error microphone signal and the reference microphone signal to minimize the ambient audio sounds in the error microphone, generating a scaled anti-noise signal by applying a scaling factor to the anti-noise signal, further adjusting the response of the adaptive filter independent of a source audio signal by altering an input to the coefficient control block of the adaptive filter to compensate for the scaling factor, and combining the scaled anti-noise signal with the source audio signal to generate an audio signal provided to the transducer.
(FR) L'invention concerne un procédé qui peut consister à générer un signal anti-bruit de manière adaptative pour contrer les effets de sons audio ambiants au niveau d'une sortie acoustique du transducteur en adaptant une réponse d'un filtre adaptatif qui filtre un signal de microphone de référence en conformité avec un signal de microphone d'erreur et le signal de référence de microphone pour réduire au minimum les sons audio ambiants dans le microphone d'erreur, générer un signal anti-bruit mis à l'échelle en appliquant un facteur de mise à l'échelle au signal anti-bruit, régler la réponse du filtre adaptatif indépendamment d'un signal audio source en modifiant une entrée dans le bloc de commande de coefficient du filtre adaptatif pour compenser le facteur de mise à l'échelle, et combiner le signal anti-bruit mis à l'échelle avec le signal audio source pour générer un signal audio fourni au transducteur.
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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, KH, 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)