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1. (WO2006087813) ECHO CANCELER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2006/087813    International Application No.:    PCT/JP2005/002689
Publication Date: 24.08.2006 International Filing Date: 21.02.2005
H04R 3/02 (2006.01)
Applicants: FUJITSU LIMITED [JP/JP]; 1-1, Kamikodanaka 4-chome Nakahara-ku, Kawasaki-shi Kanagawa 2118588 (JP) (For All Designated States Except US).
SUZUKI, Masanao [JP/JP]; (JP) (For US Only).
OTANI, Takeshi [JP/JP]; (JP) (For US Only).
TANAKA, Masakiyo [JP/JP]; (JP) (For US Only)
Inventors: SUZUKI, Masanao; (JP).
OTANI, Takeshi; (JP).
TANAKA, Masakiyo; (JP)
Agent: HAYASHI, Tsunenori; Hayashi, Doi & Associates 3rd Floor, Toshou-Bldg. No.3 3-9-5, Shin-yokohama Kohoku-ku, Yokohama-shi Kanagawa 2220033 (JP)
Priority Data:
(JA) エコーキャンセラ
Abstract: front page image
(EN)The clock discrepancy between the speaker side (receiving side) and microphone side (transmitting side) of a bilateral telephone conversation capable apparatus is detected to shift, based on the detected discrepancy, the frequency of a first frequency signal (speaker signal (reference signal)) or that of a second frequency signal (microphone signal) in a frequency range, whereby the affection caused by the clock discrepancy can be simply corrected without increasing the process amount, thereby effectively suppressing the echo.
(FR)La présente invention concerne un décalage d’horloge entre la partie haut-parleur (la partie réceptrice) et la partie micro (partie émettrice) d’un appareil permettant une conversation téléphonique bilatérale qui est détecté afin d’inverser, sur la base du décalage détecté, la fréquence d’un premier signal de fréquence (signal haut-parleur (signal de référence)) ou celle d’un deuxième signal de fréquence (signal micro) dans une bande de fréquences. Ainsi, le problème provoqué par le décalage d’horloge peut être simplement corrigé sans augmenter l’intensité du processus, supprimant ainsi efficacement l’écho.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (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, HU, IE, IS, IT, LT, LU, MC, NL, 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: Japanese (JA)
Filing Language: Japanese (JA)