DE69619129D1 - System und verfahren zur doppeltenvielfachfrequenzdetektion durch verwendung von variablen rahmenlängen - Google Patents

System und verfahren zur doppeltenvielfachfrequenzdetektion durch verwendung von variablen rahmenlängen

Info

Publication number
DE69619129D1
DE69619129D1 DE69619129T DE69619129T DE69619129D1 DE 69619129 D1 DE69619129 D1 DE 69619129D1 DE 69619129 T DE69619129 T DE 69619129T DE 69619129 T DE69619129 T DE 69619129T DE 69619129 D1 DE69619129 D1 DE 69619129D1
Authority
DE
Germany
Prior art keywords
multiple frequency
frequency detection
variable frame
frame lengths
double multiple
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE69619129T
Other languages
English (en)
Other versions
DE69619129T2 (de
Inventor
Zheng-Yi Xie
G Bartkowiak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Advanced Micro Devices Inc
Original Assignee
Advanced Micro Devices Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Advanced Micro Devices Inc filed Critical Advanced Micro Devices Inc
Publication of DE69619129D1 publication Critical patent/DE69619129D1/de
Application granted granted Critical
Publication of DE69619129T2 publication Critical patent/DE69619129T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
    • H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
    • H04M7/1295—Details of dual tone multiple frequency signalling
DE69619129T 1995-11-29 1996-10-15 System und verfahren zur doppeltenvielfachfrequenzdetektion durch verwendung von variablen rahmenlängen Expired - Fee Related DE69619129T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/563,973 US5644634A (en) 1995-11-29 1995-11-29 System and method for dual tone multifrequency detection using variable frame widths
PCT/US1996/016492 WO1997020438A1 (en) 1995-11-29 1996-10-15 System and method for dual tone multifrequency detection using variable frame widths

Publications (2)

Publication Number Publication Date
DE69619129D1 true DE69619129D1 (de) 2002-03-21
DE69619129T2 DE69619129T2 (de) 2002-09-19

Family

ID=24252653

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69619129T Expired - Fee Related DE69619129T2 (de) 1995-11-29 1996-10-15 System und verfahren zur doppeltenvielfachfrequenzdetektion durch verwendung von variablen rahmenlängen

Country Status (4)

Country Link
US (2) US5644634A (de)
EP (1) EP0864233B1 (de)
DE (1) DE69619129T2 (de)
WO (1) WO1997020438A1 (de)

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FR2730114B1 (fr) * 1995-01-27 1997-04-11 France Telecom Interruption d'une communication entre deux terminaux par un appel d'un autre terminal
KR0149759B1 (ko) * 1995-11-20 1998-11-02 김광호 디지탈신호 처리칩을 이용한 디티엠프 검출기 및 구현방법
GB9603582D0 (en) 1996-02-20 1996-04-17 Hewlett Packard Co Method of accessing service resource items that are for use in a telecommunications system
JPH11502999A (ja) * 1996-01-26 1999-03-09 フィリップス エレクトロニクス ネムローゼ フェンノートシャップ トーン検出を改善した伝送システム
US5889851A (en) * 1996-02-26 1999-03-30 Lucent Technologies Inc. DTMF signal detection/removal using adaptive filters
US6370244B1 (en) 1998-04-03 2002-04-09 Board Of Regents Of The University Of Texas System Efficient digital ITU-compliant zero-buffering DTMF detection using the non-uniform discrete fourier transform
US6046977A (en) * 1998-09-23 2000-04-04 Advanced Microdevices, Inc. Method and apparatus for detecting signal misalignment
US6587559B1 (en) 1998-09-23 2003-07-01 Legerity Inc. Cross-frame dual tone multifrequency detector
US6711540B1 (en) * 1998-09-25 2004-03-23 Legerity, Inc. Tone detector with noise detection and dynamic thresholding for robust performance
US6665350B1 (en) * 1998-09-25 2003-12-16 Legerity, Inc. Method and system for improved analog signal detection
US6763106B1 (en) * 1998-11-19 2004-07-13 Legerity Inc. Signal detector with duration-based frame width
US6556674B1 (en) * 1998-11-19 2003-04-29 Legerity, Inc. Signal detector with matched filter coefficient
US6757276B1 (en) * 1998-11-24 2004-06-29 3Com Corporation Touch tone replacement for internet telephony
US6771767B1 (en) 1999-01-05 2004-08-03 Legerity, Inc. Signal detector with coefficient swapping transform unit
US6229889B1 (en) * 1999-04-05 2001-05-08 Agere Systems Guardian Corp. Robust signaling tone frequency measurement
US6671252B1 (en) * 1999-04-05 2003-12-30 Agere Systems Inc. Robust signaling tone duration measurement
JP4431210B2 (ja) * 1999-05-10 2010-03-10 株式会社ルネサステクノロジ 周波数偏差検出装置および周波数偏差検出方法
US6519541B1 (en) * 1999-06-02 2003-02-11 Vocaltec Communication, Ltd. Multiple frequency signal detector
US6560331B1 (en) * 1999-09-28 2003-05-06 3Com Corporation System and method for precise DTMF signal detection
US6674855B1 (en) 1999-10-06 2004-01-06 Comverse Ltd. High performance multifrequency signal detection
US7039044B1 (en) * 1999-10-14 2006-05-02 Mindspeed Technologies, Inc. Method and apparatus for early detection of DTMF signals in voice transmissions over an IP network
EP3349386A1 (de) 2000-01-07 2018-07-18 TQ Delta, LLC System und verfahren zur charakterisierung von übertragungsleitungen in einem dsl mehrträgersystem
GB2360420B (en) * 2000-03-17 2004-02-18 Mitel Corp Multi-frequency tone detector
US7295509B2 (en) 2000-09-13 2007-11-13 Qualcomm, Incorporated Signaling method in an OFDM multiple access system
US6801622B1 (en) * 2000-10-31 2004-10-05 Cisco Technology, Inc. Devices, software and methods for passing DTMF signals under voice compression
US6813529B2 (en) * 2001-01-19 2004-11-02 Microchip Technology Incorporated Method and apparatus for signal frequency decoding without an analog bandpass filter
US6914979B2 (en) * 2001-04-25 2005-07-05 Adaptive Digital Technologies, Inc. Tone detection
EP1335614B1 (de) * 2002-02-08 2007-11-07 Hewlett Packard Company, a Delaware Corporation Verbesserungen in Beziehung zur Detektion eines Zweitonmehrfrequenzsignales
US20030235292A1 (en) * 2002-06-24 2003-12-25 George Cheng Dual tone multi-frequency decoder combines software and hardware and method of operating the same
US7197062B2 (en) * 2002-10-01 2007-03-27 Intel Corporation Method and apparatus to detect and decode information
DE102004047704B4 (de) * 2004-09-30 2007-03-15 Infineon Technologies Ag Verfahren und Vorrichtung zum Auswerten eines Signals
US8238538B2 (en) 2009-05-28 2012-08-07 Comcast Cable Communications, Llc Stateful home phone service
WO2012129392A1 (en) * 2011-03-22 2012-09-27 Selective Broadcasting Corporation Apparatus, method and system for locating and monitoring the movement of an object
US9536400B2 (en) * 2013-03-14 2017-01-03 I & T Tech Co., Ltd. Alarm sound detection device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4689760A (en) * 1984-11-09 1987-08-25 Digital Sound Corporation Digital tone decoder and method of decoding tones using linear prediction coding
US4853958A (en) * 1988-06-02 1989-08-01 Northern Telecom Limited LPC-based DTMF receiver for secondary signalling
US5257309A (en) * 1990-12-11 1993-10-26 Octel Communications Corporation Dual tone multifrequency signal detection and identification methods and apparatus
EP0548438A1 (de) * 1991-12-20 1993-06-30 International Business Machines Corporation Verfahren und Vorrichtung zur Detektierung von Zweitonmehrfrequenzsignalen
US5325427A (en) * 1992-03-23 1994-06-28 At&T Bell Laboratories Apparatus and robust method for detecting tones
US5319703A (en) * 1992-05-26 1994-06-07 Vmx, Inc. Apparatus and method for identifying speech and call-progression signals
SE9202065L (sv) * 1992-07-03 1994-01-04 Ericsson Telefon Ab L M Sätt att förbättra mottagarens känslighet och talimmuniteten vid DTMF-mottagning
JP2851974B2 (ja) * 1992-08-07 1999-01-27 シャープ株式会社 Ｄｔｍｆ信号判定回路
US5333191A (en) * 1993-04-22 1994-07-26 Interdigital Technology Corporation Detection of multifrequency tone signals
DE69328356T2 (de) * 1993-04-29 2000-10-19 Ibm Signaltonerkennungsverfahren und -Apparat zum Erkennen zumindest eines Tones in einem Dualton-Multifrequenzsignal
US5408529A (en) * 1993-06-02 1995-04-18 Motorola, Inc. Dual tone detector operable in the presence of speech or background noise and method therefor

Also Published As

Publication number Publication date
WO1997020438A1 (en) 1997-06-05
US5694466A (en) 1997-12-02
DE69619129T2 (de) 2002-09-19
US5644634A (en) 1997-07-01
EP0864233A1 (de) 1998-09-16
EP0864233B1 (de) 2002-02-06

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee