WO1995019086A1 - Dispositif et procede de teleconference/telecommunications - Google Patents

Dispositif et procede de teleconference/telecommunications Download PDF

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Publication number
WO1995019086A1
WO1995019086A1 PCT/US1995/000015 US9500015W WO9519086A1 WO 1995019086 A1 WO1995019086 A1 WO 1995019086A1 US 9500015 W US9500015 W US 9500015W WO 9519086 A1 WO9519086 A1 WO 9519086A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal path
data
signal
signals
receive
Prior art date
Application number
PCT/US1995/000015
Other languages
English (en)
Inventor
Dennis Laberdie
Original Assignee
Physicians World Communications Group
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 Physicians World Communications Group filed Critical Physicians World Communications Group
Priority to AU25907/95A priority Critical patent/AU2590795A/en
Publication of WO1995019086A1 publication Critical patent/WO1995019086A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H04M3/568—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/066—Telephone sets adapted for data transmision
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities

Definitions

  • the invention concerns telecommunications conferencing systems, in general.
  • the invention concerns an apparatus for use with a telecommunications system to facilitate oral and graphical presentations using standard telephones and data processing equipment connected via standard telephone lines.
  • conference call has become a standard practice for bringing persons together for discussion without requiring the participants to travel from their current locations.
  • conventional conference calls save time and travel expense, they are of limited usefulness when graphical information, such as drawings, schematics, etc., is the subject of discussion. Such graphical information can also be particularly persuasive in sales presentations.
  • a system which provides both oral and visual presentations among multiple locations is highly desirable. Such a system would be further enhanced- by an interactive capability which allows attendees at remote locations to communicate with each other in an interactive manner.
  • U.S. Patent 4,320,522 to Hayes discloses that a broad range of frequency and signal formats have been developed over the years and are used in present day tone frequency signalling systems.
  • U.S. Patent 4,716,583 to Groner et al. discloses a multi ⁇ channel communications system that accepts dual tone multiple frequency (DTMF) encoded commands also known as Touch-Tone commands fro ⁇ r* - ⁇ — telephone caller and translates the encoded text, such as ASCII text, from a plurality of distinct data bases into verbal English or any other language regardless of the content of the data base.
  • DTMF dual tone multiple frequency
  • This system uses a text to speech translator, a telephone interface and a data base access interface with the central processor.
  • the telephone interface provides a telephone connection with the user by detecting incoming calls and by instigating calls, decodes DTMF instructions by the user and transmits verbal responses back to the user.
  • a processor controls the system and responds to signals from the telephonic interface.
  • U.S. Patent 4,922,517 to West discloses an interface system for interfacing a standard telephone set with a radio transceiver as part of a telephone network. West discloses muting an audio channel for 200 milliseconds after a telephone key is pressed. Muting also takes place when a transceiver receives tone generated signals and regenerates and transmits the tones, since such tones will be heard over a connected audio channel unless muted.
  • a telecommunications apparatus which can be connected between a standard telephone and a data processing device, such as- "a—personal computer.
  • the telecommunications apparatus includes an interface which receives information from a telephone or telephone line and outputs the received information to two signal paths.
  • the first signal path has a time delay while the second signal path does not. Outputs from the first signal path are used to drive a speaker.
  • a squelch circuit is used to squelch outputs from the first signal path when signals in the second signal path have selected predetermined characteristics.
  • a decoder in the squelch circuit determines if undelayed signals in the second signal path are data signals, such as DTMF signals.
  • a muting circuit in the first signal path is activated to suppress the output of signals from the first signal path. Since signals in the first signal path are used to drive a speaker, muting the DTMF signals prevents the speaker from producing unpleasant noise.
  • the DTMF signals in the second path are encoded into data compatible with the processing device and routed via an interface, such as a RS-232 interface, to the data processing device, such as a personal computer.
  • the computer can also transmit information through the same interface to the encoder/decoder, which encodes the information into DTMF signals to be transmitted through the telephone to another device communicating with the telephone.
  • An apparatus also provides a key pad which allows the user to output sixteen discrete Touch-Tone signals locally, without the need for the speaker phone and telephone lines, or remotely using the speaker and telephone lines, to be used as input for the touch-tone encoder/decoder.
  • a telephonic device such as a speaker phone
  • telephone lines are used to establish an analog telephone connection between two or more modules.
  • the decoder accepts audio input via the speaker phone.
  • the decoder recognizes the standard Touch-Tones and converts them to standard ASCII 8-bit binary data to be sent to control software via an RS-232 serial port on a computer.
  • the apparatus according to the invention has a delay and a mute circuit which, when it recognizes a Touch-Tone signal, mutes the audio output so that the Touch-Tone is not heard.
  • the apparatus according to the invention thus provides signals to an amplifier and speaker used to amplify and project the audio.
  • FIG. 1 is a block diagram of an apparatus according to the invention
  • Figure 2 is a diagram illustrating timing relationships in a system according to the invention.
  • FIG. 3 is a schematic diagram showing an implementation of an apparatus according to the invention.
  • Figure 4 illustrates a telecommunication system employing a teleconference apparatus according to the invention.
  • FIG. 1 illustrates a telecommunications apparatus or conference device 1 used with a data processing device 3, such as a personal computer, and a telephonic device 5, such as a telephone having a line side 2 for connection to a telephonic communications medium.
  • telecommunications apparatus 1 has a telephonic interface 7.
  • Telephonic interface 7 includes circuitry for interfacing telecommunications apparatus 1 with a signal side 4 of telephonic device 5.
  • Telephone 5 provides both voice and non-voice signals to telephonic interface 7 of telecommunications apparatus 1.
  • Telephonic interface 7 then provides the signals to a first signal path 9 having a time delay circuit 11 therein.
  • the signals from telephonic interface 7 are also provided to a second signal path 13.
  • Second signal path 13 has no delay element.
  • Signals output from telephonic interface 7 along second signal path 13 are applied to one input of a squelch circuit 15.
  • Another input of squelch circuit 15 receives outputs from delay circuit 11.
  • Squelch circuit 15 detects predetermined characteristics of the signals from the second, undelayed signal path 13.
  • encoder/decoder 17 within squelch circuit 15 detects if the signals output from telephonic interface 7 are DTMF or Touch-Tone signals. If so, encoder/decoder circuit 17 provides a squelch command on signal line 19 to activate muting circuit 21. In response, muting circuit 21 squelches outputs from delay circuit 11, thereby preventing signals from reaching speaker 23.
  • Time delay circuit 11 is configured to allow sufficient time for encoder/decoder non-voice signals circuit 17 to recognize the non-voice signals. Recognition of these before they are output from the delay circuit permits them to be squelched by muting circuit 21 non-voice signals so that speaker 23 produces only voice signals for the listener. Thus, by activating muting circuit 21, squelch circuit 15 prevents unpleasant noise generated by the data signals, such as DTMF signals, from being reproduced by speaker 23. Encoder/decoder 17 also receives the DTMF signals and translates them into data which can be used by a standard data processing device 3, such as a personal computer.
  • Encoder/decoder 17 can also interface with keypad 25 to provide DTMF signals from the encoder/decoder 17 to telephone 5 through telephonic interface 7.
  • data processing device 3 can communicate through interface 28 with encoder/decoder 17.
  • Encoder/decoder 17 converts data received from the computer 3 into DTMF signals which can then be transmitted by telephone 5, thereby providing an inter-active capability for the system.
  • FIG. 1 illustrates the timing relationship among the delayed and non-delayed signals.
  • Signal line A indicates a composite signal of audio and DTMF signals which appears at signal line 13. These signals can be any combination of signals from the telephone 5 and data processing device 3.
  • Signal B illustrates that the output of delay element 11 is signal A shifted in time by a predetermined amount.
  • Squelch command C appears on signal 19 in response to detection by the encoder/decoder 17 of DTMF signals. Squelch command C causes muting circuit 21 to prevent DTMF signals from reaching speaker 23, as shown by speaker input signal D in Figure 2.
  • FIG. 3 is a more detailed diagram of an apparatus according to the invention.
  • a phone line input is introduced at lines LI and L2 through transformer Tl.
  • DTMF input is coupled through capacitor 27 to encode/decode circuits, which are commercially available chips U5 and U6. Since no delay is incorporated in this path, DTMF signals are decoded and transmitted to a computer through RS-232 interface U7.
  • data from the computer can be transmitted through interface U7 to encoder/decoder U5 and U6 to provide DTMF output of computer data to the telephone line.
  • a pre-amp and filter circuit may be used to amplify-and tailor the frequency characteristics of voice data.
  • the processed signal is then routed through delay unit U2.
  • signal line 19 provides a mute command from the encoder/decoder formed by circuits U5 and U6.
  • the mute command turns on transistor Ql when DTMF signals are detected.
  • Activating transistor Ql to the on state shunts the output from the delay circuit which is coupled to the collector of transistor Ql to ground, thereby eliminating from the speaker any noise that would be produced by the DTMF signals.
  • transistor Ql When transistor Ql is not turned on, signals are transferred through an output amplifier to the speaker for reproduction. Since only non-DTMF signals are reproduced, DTMF induced noise is not output by the speaker.
  • Figure 4 illustrates that a system according to the invention can incorporate one or more of the apparatus shown in Figures 1 and 3.
  • Figure 4 shows several devices connected to a transmission medium 40.
  • transmission medium 40 is typically a telephone line which may be interconnected to other transmission medium ordinarily used for telephonic communications.
  • a plurality of telephones 5 communicating over transmission medium 40 would be connected to telecommunications apparatus 1.
  • telecommunications apparatus 1 would then be connected to data processing unit 3. Participants having only a telephone 42 are restricted to voice only participation.
  • a unit 44 which would include telephone 5 and telecommunications apparatus 1 or a unit 46 which would include telephone 5, telecommunications apparatus 1 and data processing unit 3 in an integrated assembly.
  • interactive capability is provided among all teleconference participants shown in Figure 4.
  • the graphic or other information would be processed by each participant's computer or other data processing device to be displayed, stored or otherwise processed as desired.
  • each participant could participate in the voice conference.
  • each participant could have the capability to adjust the display, for example, to highlight areas to highlight areas on the display requiring further explanation or comment or to generate a new display for discussion.
  • a completely interactive system is formed without the need for complex modems or non-standard equipment.
  • An apparatus according to the invention would have application across a wide spectrum of communications users.
  • the apparatus and communication method according to the invention could be used in interactive educational applications for communication between any number of students and teachers.
  • the invention finds application in medical or other scientific fields for transmission of voice, text and graphic information relating to a topic being discussed among participants, such as experts or consultants.
  • Another application of the invention is found in sales and other business presentations where interactive capability is useful.

Abstract

Un dispositif de télécommunications (1) possède une interface (7) qui reçoit des informations vocales et de données provenant d'un appareil téléphonique (4), et envoie ces informations dans un premier trajet de signal (9) avec une temporisation, et dans un deuxième trajet de signal non temporisé (13). Un circuit de blocage automatique (15) comprend un silencieux (21) qui bloque automatiquement les sorties provenant du premier trajet de signal temporisé (9) quand un détecteur (17) dans le circuit de blocage automatique (15) estime que les signaux du deuxième trajet de signal non temporisé (13) présentent certaines caractéristiques prédéterminées, telles que des caractéristiques de signaux de multifréquence en code 2. Le dispositif de télécommunication (1) est branché entre un téléphone (5) et un processeur de données (3) tel qu'un ordinateur personnel. Des informations vocales et graphiques sont transmises par l'intermédiaire du téléphone parmi les stations participantes. Au niveau des stations pourvues du dispositif de télécommunications, des signaux de multifréquence en code 2 sont détectés et bloqués automatiquement dans le trajet de signal temporisé, de sorte que les bruits désagréable n'y soient pas reproduits. Le trajet de signal temporisé est ensuite utilisé afin de commander un haut-parleur (23) qui produit l'information vocale. L'information non vocale dans le deuxième trajet de signal telle que des signaux de multifréquence en code 2, est convertie non vocalement sous une forme pouvant être affichée, mémorisée ou généralement être utilisée par l'ordinateur au niveau de la station. Etant donné que toutes les communications sont directives en D1, le système permet d'établir des communications interactives sans modems ou autre équipement spécifique.
PCT/US1995/000015 1994-01-11 1995-01-11 Dispositif et procede de teleconference/telecommunications WO1995019086A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU25907/95A AU2590795A (en) 1994-01-11 1995-01-11 Telecommunications conferencing/communications apparatus and method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US18006494A 1994-01-11 1994-01-11
US08/180,064 1994-01-11

Publications (1)

Publication Number Publication Date
WO1995019086A1 true WO1995019086A1 (fr) 1995-07-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/000015 WO1995019086A1 (fr) 1994-01-11 1995-01-11 Dispositif et procede de teleconference/telecommunications

Country Status (2)

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AU (1) AU2590795A (fr)
WO (1) WO1995019086A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2335109A (en) * 1994-03-24 1999-09-08 Ultratec Inc Text enhanced telephony
EP0978981A2 (fr) * 1998-08-05 2000-02-09 AT&T Corp. Interruption de parole de l'appelant en réseau
US6510206B2 (en) 2000-09-19 2003-01-21 Ultratec, Inc. Relay for personal interpreter
US6603835B2 (en) 1997-09-08 2003-08-05 Ultratec, Inc. System for text assisted telephony
EP1689160A1 (fr) * 2005-02-04 2006-08-09 Sap Ag Transmission de données sur une connection téléphonique
US7555104B2 (en) 1997-09-08 2009-06-30 Ultratec, Inc. Relay for personal interpreter
US8515024B2 (en) 2010-01-13 2013-08-20 Ultratec, Inc. Captioned telephone service
US8917821B2 (en) 2005-06-29 2014-12-23 Ultratec, Inc. Device independent text captioned telephone service
US10389876B2 (en) 2014-02-28 2019-08-20 Ultratec, Inc. Semiautomated relay method and apparatus
US10878721B2 (en) 2014-02-28 2020-12-29 Ultratec, Inc. Semiautomated relay method and apparatus
US10917519B2 (en) 2014-02-28 2021-02-09 Ultratec, Inc. Semiautomated relay method and apparatus
US11258900B2 (en) 2005-06-29 2022-02-22 Ultratec, Inc. Device independent text captioned telephone service
US11539900B2 (en) 2020-02-21 2022-12-27 Ultratec, Inc. Caption modification and augmentation systems and methods for use by hearing assisted user
US11664029B2 (en) 2014-02-28 2023-05-30 Ultratec, Inc. Semiautomated relay method and apparatus

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Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2335109B (en) * 1994-03-24 2003-05-07 Ultratec Inc Text enhanced telephony
GB2335109A (en) * 1994-03-24 1999-09-08 Ultratec Inc Text enhanced telephony
US6603835B2 (en) 1997-09-08 2003-08-05 Ultratec, Inc. System for text assisted telephony
US8213578B2 (en) 1997-09-08 2012-07-03 Ultratec, Inc. System for text assisted telephony
US7555104B2 (en) 1997-09-08 2009-06-30 Ultratec, Inc. Relay for personal interpreter
EP0978981A2 (fr) * 1998-08-05 2000-02-09 AT&T Corp. Interruption de parole de l'appelant en réseau
EP0978981A3 (fr) * 1998-08-05 2003-11-19 AT&T Corp. Interruption de parole de l'appelant en réseau
US6510206B2 (en) 2000-09-19 2003-01-21 Ultratec, Inc. Relay for personal interpreter
US8917822B2 (en) 2001-08-23 2014-12-23 Ultratec, Inc. System for text assisted telephony
US8908838B2 (en) 2001-08-23 2014-12-09 Ultratec, Inc. System for text assisted telephony
US9131045B2 (en) 2001-08-23 2015-09-08 Ultratec, Inc. System for text assisted telephony
US9961196B2 (en) 2001-08-23 2018-05-01 Ultratec, Inc. System for text assisted telephony
US9967380B2 (en) 2001-08-23 2018-05-08 Ultratec, Inc. System for text assisted telephony
US11190637B2 (en) 2004-02-18 2021-11-30 Ultratec, Inc. Captioned telephone service
US11005991B2 (en) 2004-02-18 2021-05-11 Ultratec, Inc. Captioned telephone service
US10491746B2 (en) 2004-02-18 2019-11-26 Ultratec, Inc. Captioned telephone service
US10587751B2 (en) 2004-02-18 2020-03-10 Ultratec, Inc. Captioned telephone service
US7995722B2 (en) 2005-02-04 2011-08-09 Sap Ag Data transmission over an in-use transmission medium
EP1689160A1 (fr) * 2005-02-04 2006-08-09 Sap Ag Transmission de données sur une connection téléphonique
US10972604B2 (en) 2005-06-29 2021-04-06 Ultratec, Inc. Device independent text captioned telephone service
US10015311B2 (en) 2005-06-29 2018-07-03 Ultratec, Inc. Device independent text captioned telephone service
US11258900B2 (en) 2005-06-29 2022-02-22 Ultratec, Inc. Device independent text captioned telephone service
US8917821B2 (en) 2005-06-29 2014-12-23 Ultratec, Inc. Device independent text captioned telephone service
US10469660B2 (en) 2005-06-29 2019-11-05 Ultratec, Inc. Device independent text captioned telephone service
US8515024B2 (en) 2010-01-13 2013-08-20 Ultratec, Inc. Captioned telephone service
US10878721B2 (en) 2014-02-28 2020-12-29 Ultratec, Inc. Semiautomated relay method and apparatus
US10917519B2 (en) 2014-02-28 2021-02-09 Ultratec, Inc. Semiautomated relay method and apparatus
US10742805B2 (en) 2014-02-28 2020-08-11 Ultratec, Inc. Semiautomated relay method and apparatus
US10389876B2 (en) 2014-02-28 2019-08-20 Ultratec, Inc. Semiautomated relay method and apparatus
US10542141B2 (en) 2014-02-28 2020-01-21 Ultratec, Inc. Semiautomated relay method and apparatus
US11368581B2 (en) 2014-02-28 2022-06-21 Ultratec, Inc. Semiautomated relay method and apparatus
US11627221B2 (en) 2014-02-28 2023-04-11 Ultratec, Inc. Semiautomated relay method and apparatus
US11664029B2 (en) 2014-02-28 2023-05-30 Ultratec, Inc. Semiautomated relay method and apparatus
US11741963B2 (en) 2014-02-28 2023-08-29 Ultratec, Inc. Semiautomated relay method and apparatus
US11539900B2 (en) 2020-02-21 2022-12-27 Ultratec, Inc. Caption modification and augmentation systems and methods for use by hearing assisted user

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