Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO2012166273) AN ADAPTIVE NOISE CANCELING ARCHITECTURE FOR A PERSONAL AUDIO DEVICE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2012/166273 International Application No.: PCT/US2012/035815
Publication Date: 06.12.2012 International Filing Date: 30.04.2012
Chapter 2 Demand Filed: 24.10.2013
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, INC. [US/US]; 800 W 6th St. Austin, TX 78701, US (AllExceptUS)
Inventors:
HENDRIX, Jon, D.; US
KAMATH, Gautham, Devendra; US
KWATRA, Nitin; US
ABDOLLAHZADEH MILANI, Ali; US
ALDERSON, Jeffrey; US
Agent:
HARRIS, Andrew, Mitchell; Mitch Harris, Attorney At Law, L.L.C. P.O. Box 7998 Athens, GA 30604, US
Priority Data:
13/413,92007.03.2012US
61/493,16203.06.2011US
Title (EN) AN ADAPTIVE NOISE CANCELING ARCHITECTURE FOR A PERSONAL AUDIO DEVICE
(FR) ARCHITECTURE D'ANNULATION ADAPTATIVE DU BRUIT POUR DISPOSITIF AUDIO PERSONNEL
Abstract:
(EN) A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) circuit that adaptively generates an anti-noise signal from a reference microphone signal that measures the ambient audio and an error microphone signal that measures the output of an output transducer plus any ambient audio at that location and injects the anti-noise signal at the transducer output to cause cancellation of ambient audio sounds. A processing circuit uses the reference and error microphone to generate the anti- noise signal, which can be generated by an adaptive filter operating at a multiple of the ANC coefficient update rate. Downlink audio can be combined with the high data rate anti-noise signal by interpolation. High-pass filters in the control paths reduce DC offset in the ANC circuits, and ANC coefficient adaptation can be halted when downlink audio is not detected.
(FR) Selon l'invention, un dispositif audio personnel, tel qu'un téléphone sans fil, comprend un circuit d'annulation adaptative du bruit (ANC) qui génère d'une manière adaptative un signal antibruit à partir d'un signal de microphone de référence qui mesure le son ambiant et d'un signal de microphone d'erreur qui mesure la sortie d'un transducteur de sortie plus tout son ambiant à cet emplacement et injecte le signal antibruit à la sortie du transducteur afin de provoquer une annulation des sons ambiants. Un circuit de traitement utilise les microphones de référence et d'erreur pour générer le signal antibruit, qui peut être généré par un filtre adaptatif fonctionnant à un multiple de la fréquence de mise à jour de coefficient ANC. Un signal audio de liaison descendante peut être combiné avec le signal antibruit à haut débit de données par interpolation. Des filtres passe-haut dans les chemins de commande réduisent le décalage du niveau continu dans les circuits ANC, et une adaptation de coefficient ANC peut être arrêtée lorsqu'un signal audio de liaison descendante n'est pas détecté.
front page image
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, 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, 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, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, 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, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP2715718JP2014519758EP2804174EP2824660KR1020140035414IN9477/CHENP/2013