Patent AU-2019382298-B2 (AU)
Title: Telephone apparatus, method of controlling telephone apparatus, and program
Inventor: FUJII ATSUSHI
IPC: H04N1/00
Filed: 2019-12-13
Granted: 2023-01-05
Abstract: f 17 H (17.09.2020) WO 2020/183833 Al 
WIPO I PCT 
(51) Pq Vi }§ : $$fi )|| M, I| ru $r F M$ EX -| L R - T F 
H04MJ/60 (2006.01) H04B 3/20 (2006.01) 6 1 - Kanagawa (P).  
H04R3/02(2006.01) (72)#H % :84|-(FUJIIAtsushi); T2138511 $$ 
(21) ): PCT/JP2019/048958 II)||-ri I-|b --tT 6* 1 -1 N E C 
(22) IiH tJl 201912 iA 13 H (13.12.2019) '0 -7- A X4 A] Kanagawa (P).  
(25) 5 6tJ n0 : * (74) tiA: A R (IEIRI Takeshi); ~2210835$ 
)||@ |% k r| $$$ ||X QR ]-T F1 3 
(26) r F OD 3 8! : t! 3: f 8 7 5) l' |-0 P -'; W,5 
(30) % 4f-75-y : aT# RpFJi Kanagawa (P).  
t#J 2019-045474 2019*3)l13H(13.03.2019) JP (gi) 0),gS -0 t0)iYSNW 
(71) tA: N E C - y t7t - A Xt4 t *fi Jf):AE, AG, AL, AM, AO, AT, AU, AZ, 
(NEC PLATFORMS, LTD.) [JP/JP]; 2138511 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, 
(54) Title: TELEPHONE DEVICE, METHOD FOR CONTROLLING TELEPHONE DEVICE, AND PROGRAM 
S(54)#H500)&TM:, =~h ~ 0g~;*~ft 
104A06 109 
111 Ree 0ig3e 
100 Telepnonecdevice 113 vinunrolu 
104 Microphone 14 Storage unit 
Setneoume Transmitedsignal 
106 Sedigolm S2Rciesga 
10 e int rigaegeneration unit S S Sietoesgnal 
109 4ienefceiB e h 
110 Linevolumemeasuringunit BB Line echo 
(57)Abstract:Thepresent inventionprovidesatelephonedevice,amethod forcontrollingthetelephonedevice,anda 
programwithwhichitispossible toprevent howling morereliably.The controlunit(113)ofatelephonedevice(100) 
performs first process of: estimating alone echo amountonthebasisofthevolumeofaDTMFsignalgenerated bya 
DTMFsignal generation unit (108)andthevolumeofthe DTMF signal inputted froma line (200); calculatingahowling 
thresholdon the basis of thesmaximum value ofan acoustic echo generated ina previouslymeasuredtelephoneceiver 0 TFsga eeainui 18 n h oueo h TFsga nutdfo ie(0) acltn oln 
CAtrsodo0h ai ftemxmmvleo naosiceh eeae napeiul esrdtlpoercie
W O 220 20/183833 A11111I||I|I||I|I|||I|||||I|I|||III ||||lii |||||||||||||||||||||||||||| 
HN, HR, HU, ID, IL, IN, IR, IS, JO, 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.  
(84) L(\t¶0) togUg 
Ab1 fib): ARIPO (BW, GH, GM, KE, LR, LS, 
MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, 
ZW), J-5 7 (AM, AZ, BY, KG, KZ, RU, TJ, 
TM), - - F 2/A (AL, AT, BE, BG, CH, CY, CZ, 
DE, DK, EE, ES, Fl, 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), OAPI (BF, BJ, CF, CG, CI, CM, 
GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG).  
- |$Tht4R (AM21(3)) 
(104) and the set value of a sidetone volume (105), a sending volume (106) and a receiving volume (111); calculating 
a difference between the line echo amount and the howling threshold as a necessary adjustment amount when the line 
echo amount is larger than the howling threshold; and lowering the set value of the sidetone volume (105) as much as 
the necessary adjustment amount.  
t A --I( 1 0 0 0) $1]f0 (1 1 3) (t, D T M F ( - ( 1 0 8) It 
0 A -A \ D T FC [9,M )- A TL, ] %T ( 2 0 06 (J1 04 4) c t t D T M F Zt 
Tt f-L2I -,T J7r)a- (10) NMfiA Wff')a 9 -- (16 A \ ) 
PIM a-A (15ot- -- 1L),Xh Itt UZ v')>WIKTL-fV &) 
7'aA (1 0 5) 6 O T- f RA sAMT, / 0 106 DM¶It I 4 j 0