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WO1996011529A1 - Commutateur d'emetteur commande par la voix - Google Patents

Commutateur d'emetteur commande par la voix Download PDF

Info

Publication number
WO1996011529A1
WO1996011529A1 PCT/US1995/012646 US9512646W WO9611529A1 WO 1996011529 A1 WO1996011529 A1 WO 1996011529A1 US 9512646 W US9512646 W US 9512646W WO 9611529 A1 WO9611529 A1 WO 9611529A1
Authority
WO
WIPO (PCT)
Prior art keywords
transmitter
switch
voice
command
digital
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.)
Ceased
Application number
PCT/US1995/012646
Other languages
English (en)
Inventor
Thomas J. Rotunda, Jr.
Frank X. Linder
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1996011529A1 publication Critical patent/WO1996011529A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/32—Automatic control in amplifiers having semiconductor devices the control being dependent upon ambient noise level or sound level
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L15/00—Speech recognition
    • G10L15/26—Speech to text systems

Definitions

  • TECHNICAL FIELD This invention relates to the technical field of authenticated voice activated transmitter switches.
  • This invention relates to an improvement in radio microphone systems commonly found in emergency vehicles such as police, fire ambulance etc. Many accidents have been caused in emergency vehicles while returning the microphone to its hold position because the driver could not locate the home position without taking the eyes off the road.
  • This invention entails automatically turning the microphone on with the voice of the user thereby obviating the manual push to talk switch commonly found on such microphones.
  • Two sets of voice commands are generated for each operator one to turn the transmission on and the other to turn the transmission off.
  • the voice print/signature of a few authorized people is stored in the system such that unauthorized people are not able to interrupt the system.
  • the unit provides for the training of the system by each operator.
  • the voice switch is interface and plug compatible with existing push to talk switch found on microphones in emergency vehicles.
  • the applicants are first to disclose a simple automatic replacement of the push to talk switch on radio microphones found in emergency vehicles. Unfortunately none of the prior art devices singly or even in combination meet all of the objectives established by the inventor for this voice activated radio microphone.
  • OBJECTIVES 1.
  • the main objective of this invention is to provide a simple, low cost, hands free operation of a two way radio such that the microphone push to talk switch function normally used in two way emergency mobile radios to turn the transmitter on and off is replaced by a recognized voice command.
  • Another objective of the invention is to prevent emergency vehicle accidents caused while accessing or returning the microphone to its hold position because driver is unable to handle the mike and the concomitant push-to-talk switch on the prior art emergency microphones without taking the eyes off the road. 3.
  • Another objective of this invention is to provide a system where the need for push to talk switch in microphones is altogether obviated or used merely as a backup. 4. Another objective of this invention is to provide a low noise voice activated radio microphone switch that can operate reliably in high ambient noise. 5. Another objective of this invention is to provide an add on unit to existing radio microphone systems in emergency vehicles that can be easily interfaced. 6. Another objective of this invention is that it use little or no energy. 7. Another objective of this invention is that it can be used without detracting from the task of driving. 8. Another objective of this invention is that it be secure such that it recognizes the voice prints of a few authorized users in real time. 9. Another objective of this invention is that the system of this invention be compact, light weight and low cost. 10.
  • Another objective of this invention is that the various components not interfere with the driver or the other components in the emergency vehicle.. 11. Another objective of this invention is that the invention use modular standard components easily interface- able to each other. 12. Another objective of this invention is that it be reliable such that it practically never fails and requires little or no maintenance. 13. Another objective of this invention is that it is easy to use even intuitive requires little training if any and does not expect the driver to do any thing different and unusual or even unnatural. 14. Another objective of this invention is that it be environmentally safe. 15. Another objective of this invention is that it be physically safe in normal environment as well as accidental situations. 16. Another objective of this invention is that it meet all federal, state, local and other private standards guidelines, regulations and recommendations with respect to safety, environment, energy consumption. 17.
  • Another objective of this invention is that it provide both analog and digital outputs so that both digital and analog type transmitters can be activated with equal ease. 18. Another objective of this invention is that it be safe, fail-safe and fail-soft, stable, reliable secure and flexible. 19. Another objective of this system is that a stranger or any authorized person cannot accidentally turn on or off the microphone or enable or disable the system. 20. Another objective of this invention is that the driver or other authorized user cannot accidentally turn off the microphone or disable the system. 21. Another objective of this invention is that it use very little energy. 22. Another objective of this invention is that its design be streamlined and have a small footprint. 23. Another objective of this invention is that its design is aesthetic to blend with the decor of the emergency vehicle or other environment. 24.
  • Another objective of this invention is that it not interfere with normal functions of the driver and the driving tasks. 25. Another objective of this invention is that it be adaptable for other primary and secondary uses without significant modifications. 26. Another objective of this invention is to facilitate and optimize under cover police work by obviating use of hand held mike and thereby making detection difficult if not impossible and reducing the chances of related injuries. 27. Another objective of this invention is to facilitate use of such radios and concomitant communications in ambulance cab section where hands of paramedic or other medical assistant are free to provide assistance to the patient without the use of hand held mike. Other objectives of this invention reside in its simplicity, elegance of design, ease of manufacture, service and use and even aesthetics as will become apparent from the following brief description of the drawing and detailed description of the best mode embodiment.
  • FIG 1 is a system interface block diagram of the voice activated transmitter switch of this invention.
  • FIG 2 is a detailed block diagram of the voice activated transmitter switch of this invention.
  • FIG. 3 is a flow-chart of the voice activated transmitter switch of this invention.
  • a pair of microphones 10 generally 180 degrees apart, the out put of which is applied to plus and minus inputs of a differential amplifier 20.
  • the Output of the differential amplifier is then passed through an A/D converter 30 and is then digitally processed in a digital processor 50 to include phrase recognition such as "Key Mike" to engage and activate the transmission and "Over” to disengage and deactivate the transmitter 100. Also included are such features as phrase learning and training, auto time out and intelligibility processing.
  • Digital processor 50 also has on-board memory 55 to store sample voice prints as signatures of the authorized personnel.
  • the speech recognition, conditioning and comparison circuit 110 of the processor 50 verifies by comparing envelopes and harmonics etc before activating the transmitter 100. It should be noted that transmitters with digital interface receive the output of the digital process directly.
  • the entire invention comprising the pair of microphones 10, differential preamplifier 20, Codec 35 (which performs the functions of A/D converter 30 and D/A converter 40), and digital processor 50 is plug and interface compatible with the single existing microphone and the existing transmitter 100.
  • the analog signal from the mike 10 via differential preamplifier 20 can go directly to the transmitter 100 and the input to the A/D circuitry 30 (or codec 35) tapped off of it without severing the existing connection 22 between the microphone 10 (via differential preamp 20) and the transmitter 100.
  • connection 22 between the microphone 10 and the transmitter 100 can be severed and then is either reconverted back to analog via D/A converter 40 (or via codec 35) or directly fed to a digital input of a transmitter with that capability.
  • additional digital processing via digital processor 50 is done to effect bandwidth spectrum balance, to alter intensity ratios, to improve intelligibility or other desired signal characteristics.
  • the invention comprises a pair of electret microphones 10 with differential pre-amps 20 to condition the signals for analog to digital converter 30 or codec 35 which is a linear codec commonly used in digital telephone systems. The data is then processed through a digital signal processor 50 which performs the voice recognition conditions and comparison function 110.
  • controller 120 which is a single CMOS microprocessor chip with plurality of I/O lines for interface as well as external address and data buses.
  • the program 150 for the controller 50 and the program routines 152 for the DSP 50 are stored in PROM 52.
  • All the indicators 80 and switches 90 are also under the control of controller 120. For convenience all of said components are mounted on a single throw-away board, which allows the use of automated assembly techniques to used for fabrication and mass production. All of the actions taken by the speech recognition circuit are accomplished under the control of the controller 120, which monitors the external switches 90 and controls the indicators 80 as well as the transmitter 100.
  • the controller 120 further initialize the speech recognition circuits, initialize and monitors all of the registers of the microprocessor or DSP 50 for whatever function is being requested by the user through said switch 90.
  • the controller 120 can also select either conditioned speech, processed through the speech conditioning circuit or the analog audio from the microphone 10 can be patched directly to the transmitter 100.
  • voice activated transmitter switch flow-chart after initialization 200 comprises plurality of decision blocks a) Is stored command valid? - 210 b) Is switch pushed? - 220 c) Is calibration complete? - 230 d) Is calibration switch pushed? - 240 e) Is transmitter active? - 250 f) Does voice on command match?
  • the inventor used microphones 10 Panasonic model WM-54BT. Differential pre-amps were implemented using single supply quad OP AMP LM324 which is an industry standard, which provides proper gain and conditioning for proper levels for codec 35 for which U-LAW/A-LAW PCM codec AT&T T-7500 was used.
  • AT&T DSP16A1 The controller 120 was 8 bit Hitachi HD6305 and RAM Module was SRAM Hitachi HN62256. Both of these and other components can be used by a person of average skill in the art with equal facility.
  • the installation use and operation of this device is simple and even intuitive.
  • the pair of microphones is mounted in the vehicle facing opposite of each other 180 degrees apart with a nominal distance of 10 to 12 inch space between the mouth of the driver and the microphones.
  • the system is then trained with the On and off voice commands for each operator.
  • the example of an ON command is "KEY-MIKE"
  • An example of the OFF command is OVER.
  • a plurality of switches 90 and plurality of indicator lights 80 are provided which are self explanatory as follows: a) Active/Inactive switch 92 b) Learn Transmit On Command Switch 94 c) Learn Transmit OFF Command 96 d) Test Voice Command switch 98 e) LED Indicator Transmitter Active 82 f) LED Ready Indicator 84 g) LED Test/Learn Indicator 86
  • a) Active/Inactive switch 92 b) Learn Transmit On Command Switch 94 c) Learn Transmit OFF Command 96 d) Test Voice Command switch 98 e) LED Indicator Transmitter Active 82 f) LED Ready Indicator 84 g) LED Test/Learn Indicator 86
  • the test/learn indicator 86 begins to blink along with the transmitter active light 82.
  • the ready indicator 84 is lit to indicate that the operator, driver or other user should repeat the phrase.
  • the light turns off for a short period of time and then come back ON indicating that the phrase needs repeating again. The minimum number of utterances required.
  • READY indicator 84 goes steady instead of blinking and all the other indicators 82,86 are turned off.
  • the switch 98 allows the user to test and verify the training without activating the transmitter 100. In this mode the test/learn indicator 86 is turned on steady (not blinking) and the transmitter indicator 82 responds to the voice commands without keying the transmitter 100.
  • the inventor has given a non-limiting description of the concept. Many changes may be made to this design without deviating from the spirit of the concept of this invention. Examples of such contemplated variations include the following. a) A boom mike with very close coupling to the mouth of the user may be employed. b) Some of the software functions may be employed by hardware.
  • Non-obvious enhancements may be made to the flow-chart described here.
  • the voice activated transmitter switch of this invention may be adapted for other applications such as the Citizen Band Radio.
  • the invention may be adapted for physically challenged.
  • a different type of energy source such as NICAD battery or solar energy source may be employed.
  • Complementary functions such as synthesized voice output instead of LED indicators may be used.
  • Different types of switches may be used.
  • An infra-red or RF3 link to the transmitter may be used which would also allow the maximum natural noise rejection and the use of relatively inexpensive standard VOX energy detectors to be used.
  • Logical operations to monitor activity in the emergency vehicle for the safety of the driver and others may be incorporated.
  • 10 A pair of microphones such as PANSONIC WM-54BT.
  • CPU Central processing unit of a computer capable of performing all the timing, control, logic associated with running a computer program.
  • Driver - a software interface to match two or more dissimilar entities to make them compatible.
  • Interface - Matching or two or more dissimilar entities however realized
  • LED - Light emitting diode - a type of visual indicator CODEC - Coder decoder performs the same function as A/D convertor + D/A converter.
  • Program A computer program executable in a given computing environment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

L'invention concerne une amélioration apportée à des systèmes radio à microphone que l'on trouve couramment dans les véhicules d'urgence tels que les véhicules de police, de pompiers, les ambulances etc. L'amélioration permet de mettre le microphone (10) en marche automatiquement avec la voix de l'utilisateur sans qu'il soit nécessaire d'enfoncer le bouton de conversation que l'on trouve habituellement sur ces types de microphone (10). Dans le mode de réalisation préféré, on utilise deux microphones (10) généralement placés à 180° l'un par rapport à l'autre, leur sortie étant appliquée sur les sorties plus et moins d'un amplificateur différentiel (20). La sortie de l'amplificateur différentiel (20) est ensuite envoyée dans une convertisseur A/N (30) et numérisée pour authentifier le locuteur et/ou le signal vocal. Le processeur numérique (50) procède à l'authentification en comparant, entre autres, les enveloppes et les harmoniques du signal vocal avant d'activer la transmission.
PCT/US1995/012646 1994-10-06 1995-10-03 Commutateur d'emetteur commande par la voix Ceased WO1996011529A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US32183694A 1994-10-06 1994-10-06
US08/321,836 1994-10-06

Publications (1)

Publication Number Publication Date
WO1996011529A1 true WO1996011529A1 (fr) 1996-04-18

Family

ID=23252241

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/012646 Ceased WO1996011529A1 (fr) 1994-10-06 1995-10-03 Commutateur d'emetteur commande par la voix

Country Status (1)

Country Link
WO (1) WO1996011529A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003100372A1 (fr) * 2002-05-29 2003-12-04 Nokia Corporation Procede de commande de l'emission d'un equipement terminal dans un reseau numerique
ES2211300A1 (es) * 2002-08-02 2004-07-01 Sociedad Hispana De Comunicaciones, S.L. S.H.C. Equipo de radiotransmision.
EP1553795A1 (fr) * 2004-01-09 2005-07-13 Motorola, Inc. Dispositif de communication et son procédé de fonctionnement
WO2005096647A1 (fr) * 2004-03-16 2005-10-13 Sony Ericsson Mobile Communications Ab Appareil et procede de communication vocale
CN102740215A (zh) * 2011-03-31 2012-10-17 Jvc建伍株式会社 声音输入装置、通信装置、及声音输入装置的动作方法
CN114400003A (zh) * 2022-01-10 2022-04-26 北京至简科技有限公司 自动切换麦克风的控制方法、系统、电子设备及存储介质

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4945570A (en) * 1987-10-02 1990-07-31 Motorola, Inc. Method for terminating a telephone call by voice command
US5152007A (en) * 1991-04-23 1992-09-29 Motorola, Inc. Method and apparatus for detecting speech
US5267323A (en) * 1989-12-29 1993-11-30 Pioneer Electronic Corporation Voice-operated remote control system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4945570A (en) * 1987-10-02 1990-07-31 Motorola, Inc. Method for terminating a telephone call by voice command
US5267323A (en) * 1989-12-29 1993-11-30 Pioneer Electronic Corporation Voice-operated remote control system
US5152007A (en) * 1991-04-23 1992-09-29 Motorola, Inc. Method and apparatus for detecting speech

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003100372A1 (fr) * 2002-05-29 2003-12-04 Nokia Corporation Procede de commande de l'emission d'un equipement terminal dans un reseau numerique
CN100361117C (zh) * 2002-05-29 2008-01-09 诺基亚有限公司 数字网络系统中用于控制终端设备的传输的方法
ES2211300A1 (es) * 2002-08-02 2004-07-01 Sociedad Hispana De Comunicaciones, S.L. S.H.C. Equipo de radiotransmision.
ES2211300B1 (es) * 2002-08-02 2005-10-01 Sociedad Hispana De Comunicaciones, S.L. S.H.C. Equipo de radiotransmision.
EP1553795A1 (fr) * 2004-01-09 2005-07-13 Motorola, Inc. Dispositif de communication et son procédé de fonctionnement
WO2005096647A1 (fr) * 2004-03-16 2005-10-13 Sony Ericsson Mobile Communications Ab Appareil et procede de communication vocale
CN102740215A (zh) * 2011-03-31 2012-10-17 Jvc建伍株式会社 声音输入装置、通信装置、及声音输入装置的动作方法
CN114400003A (zh) * 2022-01-10 2022-04-26 北京至简科技有限公司 自动切换麦克风的控制方法、系统、电子设备及存储介质

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