MX9601081A - Filtro de tono multifrecuencia para dos tonalidades en un sistema de comunicacion telefonica. - Google Patents

Filtro de tono multifrecuencia para dos tonalidades en un sistema de comunicacion telefonica.

Info

Publication number
MX9601081A
MX9601081A MX9601081A MX9601081A MX9601081A MX 9601081 A MX9601081 A MX 9601081A MX 9601081 A MX9601081 A MX 9601081A MX 9601081 A MX9601081 A MX 9601081A MX 9601081 A MX9601081 A MX 9601081A
Authority
MX
Mexico
Prior art keywords
data
tone
speech
communication system
voice communication
Prior art date
Application number
MX9601081A
Other languages
English (en)
Inventor
Shrirang Jangi
Original Assignee
Hughes Aircraft Co
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 Hughes Aircraft Co filed Critical Hughes Aircraft Co
Publication of MX9601081A publication Critical patent/MX9601081A/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/253—Telephone sets using digital voice transmission
    • 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
    • H04Q1/4575—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 which are transmitted in digital form
    • 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
    • H04Q1/46—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Telephone Function (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

Un aparato para enviar y recibir señales digitales en un sistema (10) de comunicacion telefonica, que comprende: una memoria (116) para recibir y almacenar una señal digitalizada que incluye informacion de tono de una banda de voz e informacion de frecuencia vocal: un detector (14) en comunicacion con dicha memoria (116) para detectar informacion de tono de la banda de voz y generar al menos un paquete de tono (312) que contiene informacion indicadora de dicha informacion de tono de banda de voz; un codificador de frecuencia vocal (25) en comunicacion con dicha memoria (116) para codificar dicha informacion de frecuencia vocal en una pluralidad de paquetes de frecuencia vocal; y una unidad de transmision (13) en comunicacion con dicho detector de tono (14) y dicho codificador de frecuencia vocal (25) para transmitir un mensaje en paquete que incluye dichos paquetes de tono (312) y los paquetes de frecuencia vocal por un canal de RF.
MX9601081A 1995-03-23 1996-03-22 Filtro de tono multifrecuencia para dos tonalidades en un sistema de comunicacion telefonica. MX9601081A (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US40880595A 1995-03-23 1995-03-23

Publications (1)

Publication Number Publication Date
MX9601081A true MX9601081A (es) 1997-02-28

Family

ID=23617836

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9601081A MX9601081A (es) 1995-03-23 1996-03-22 Filtro de tono multifrecuencia para dos tonalidades en un sistema de comunicacion telefonica.

Country Status (4)

Country Link
US (1) US5666357A (es)
EP (1) EP0734185A2 (es)
CA (1) CA2171485C (es)
MX (1) MX9601081A (es)

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US6690681B1 (en) 1997-05-19 2004-02-10 Airbiquity Inc. In-band signaling for data communications over digital wireless telecommunications network
US6493338B1 (en) 1997-05-19 2002-12-10 Airbiquity Inc. Multichannel in-band signaling for data communications over digital wireless telecommunications networks
FR2767245B1 (fr) * 1997-08-08 1999-10-15 Matra Communication Station de radiocommunication numerique
US6781968B1 (en) 1997-09-08 2004-08-24 Marc Arnold Wireless communication system, apparatus and method using an atmospheric platform having a wideband trunkline
US6009383A (en) * 1997-10-30 1999-12-28 Nortel Networks Corporation Digital connection for voice activated services on wireless networks
US6782095B1 (en) * 1997-11-27 2004-08-24 Nortel Networks Limited Method and apparatus for performing spectral processing in tone detection
US6650662B1 (en) 1997-12-12 2003-11-18 International Business Machines Corporation Method and system for transmitting a DTMF signal with compressed voice in a packet switching network
US6226304B1 (en) * 1998-01-28 2001-05-01 Hughes Electronics Corporation Leased line optimization and voice quality improvement in bandwidth constrained communication systems
KR100258129B1 (ko) * 1998-03-17 2000-06-01 서평원 톤과 디티엠에프 발생 기능을 포함한 에이티엠 셀 변환 장치
US6385192B1 (en) * 1998-03-24 2002-05-07 Siemens Information And Communication Networks, Inc. Method and apparatus for DTMF signaling on compressed voice networks
US6151514A (en) * 1998-04-22 2000-11-21 Nortel Networks Corporation Method and apparatus for normalizing DTMF messages from a cellular mobile station
US6230133B1 (en) * 1998-06-24 2001-05-08 Ameritech, Inc. Home office communication system and method
US6046977A (en) * 1998-09-23 2000-04-04 Advanced Microdevices, Inc. Method and apparatus for detecting signal misalignment
JP4715860B2 (ja) * 1998-09-25 2011-07-06 株式会社日立製作所 通信装置
JP2000165915A (ja) * 1998-09-25 2000-06-16 Hitachi Telecom Technol Ltd Ｄｔｍｆ信号伝送方式及び通信装置
JP2005269663A (ja) * 1998-09-25 2005-09-29 Hitachi Communication Technologies Ltd 通信装置
JP2005210755A (ja) * 1998-09-25 2005-08-04 Hitachi Communication Technologies Ltd 通信システム及び通信方法
US6298055B1 (en) * 1998-10-26 2001-10-02 Cisco Technology, Inc. Early detection of in-band signals in a packet voice transmitter with reduced transmission delay
AU1743500A (en) * 1998-11-24 2000-06-13 Hughes Electronics Corporation Improved in-call dtmf transport for geostationary mobile satellite communicationsystem
US6775265B1 (en) * 1998-11-30 2004-08-10 Cisco Technology, Inc. Method and apparatus for minimizing delay induced by DTMF processing in packet telephony systems
US7233605B1 (en) * 1998-11-30 2007-06-19 Cisco Technology, Inc. Method and apparatus for minimizing delay induced by DTMF processing in packet telephony systems
CA2301435C (en) * 1999-04-16 2006-10-10 At&T Corp. Method for reducing congestion in packet-switched networks
JP3580723B2 (ja) * 1999-04-27 2004-10-27 沖電気工業株式会社 受信バッファ制御方法及び音声パケット復号装置
AU5482499A (en) * 1999-08-12 2001-03-13 Telogy Networks, Inc. Fast dtmf identification
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
US7110391B1 (en) * 2000-03-03 2006-09-19 Nortel Networks Limited Transporting telephony signaling over a data network
US6961320B1 (en) * 2000-04-03 2005-11-01 Hughes Electronics Corporation In-band transmission of TTY/TTD signals for systems employing low bit-rate voice compression
US6801622B1 (en) * 2000-10-31 2004-10-05 Cisco Technology, Inc. Devices, software and methods for passing DTMF signals under voice compression
US7035293B2 (en) * 2001-04-18 2006-04-25 Broadcom Corporation Tone relay
JP3600189B2 (ja) * 2001-06-19 2004-12-08 松下電器産業株式会社 パケット送受信装置及びパケット伝送方法
US7403141B2 (en) * 2002-02-12 2008-07-22 Broadcom Corporation Wireless local area network device supporting enhanced call functions
US20030194082A1 (en) * 2002-04-15 2003-10-16 Eli Shoval Method and apparatus for transmitting signaling tones over a packet switched network
GB0322711D0 (en) * 2003-09-27 2003-10-29 Ericsson Telefon Ab L M Intelligent multimedia calls
US7508810B2 (en) 2005-01-31 2009-03-24 Airbiquity Inc. Voice channel control of wireless packet data communications
DE102005046170A1 (de) * 2005-09-27 2007-04-12 Siemens Ag Verfahren und Vorrichtung zum Einfügen von DTMF-Wählsignalen in einen Datenpakete umfassenden Datenstrom
US7924934B2 (en) 2006-04-07 2011-04-12 Airbiquity, Inc. Time diversity voice channel data communications
EP2206328B1 (en) 2007-10-20 2017-12-27 Airbiquity Inc. Wireless in-band signaling with in-vehicle systems
GB2461890B (en) * 2008-07-16 2011-03-02 Tunstall Group Ltd Tone signalling
US8594138B2 (en) 2008-09-15 2013-11-26 Airbiquity Inc. Methods for in-band signaling through enhanced variable-rate codecs
US7983310B2 (en) * 2008-09-15 2011-07-19 Airbiquity Inc. Methods for in-band signaling through enhanced variable-rate codecs
US8073440B2 (en) 2009-04-27 2011-12-06 Airbiquity, Inc. Automatic gain control in a personal navigation device
US8418039B2 (en) 2009-08-03 2013-04-09 Airbiquity Inc. Efficient error correction scheme for data transmission in a wireless in-band signaling system
US8249865B2 (en) 2009-11-23 2012-08-21 Airbiquity Inc. Adaptive data transmission for a digital in-band modem operating over a voice channel
US8848825B2 (en) 2011-09-22 2014-09-30 Airbiquity Inc. Echo cancellation in wireless inband signaling modem
EP2640051B1 (en) * 2012-03-14 2018-08-01 Mitel Networks Corporation Packetising DTMF signals
US20130242978A1 (en) 2012-03-14 2013-09-19 Radovan Prodanovic System preventing double digit detection caused by in-band dual-tone multi-frequency signaling and methods thereof
CN113572574B (zh) * 2015-12-24 2023-12-19 韦勒斯标准与技术协会公司 使用非连续信道的无线通信方法和无线通信终端

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Also Published As

Publication number Publication date
US5666357A (en) 1997-09-09
CA2171485A1 (en) 1996-09-24
EP0734185A2 (en) 1996-09-25
CA2171485C (en) 1999-10-12

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