WO2000078065A1 - Acoustic transmission using digital mobile phones - Google Patents

Acoustic transmission using digital mobile phones Download PDF

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Publication number
WO2000078065A1
WO2000078065A1 PCT/AU2000/000655 AU0000655W WO0078065A1 WO 2000078065 A1 WO2000078065 A1 WO 2000078065A1 AU 0000655 W AU0000655 W AU 0000655W WO 0078065 A1 WO0078065 A1 WO 0078065A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency
data signals
frequency modulated
signals
digital mobile
Prior art date
Application number
PCT/AU2000/000655
Other languages
French (fr)
Inventor
Harry Louis Platt
Vladimir Jankov
Original Assignee
Shell, Allan, Michael
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 Shell, Allan, Michael filed Critical Shell, Allan, Michael
Priority to AU50549/00A priority Critical patent/AU5054900A/en
Priority to EP00934814A priority patent/EP1192814A4/en
Publication of WO2000078065A1 publication Critical patent/WO2000078065A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
    • A61B5/0006—ECG or EEG signals

Definitions

  • the present invention relates to the field of monitoring a cardiac patient's electrical cardiac activity at a central location by means of an apparatus associated with a digital mobile phone handset and transmitting the information over the digital mobile phone/ telephone network.
  • Cardiac event recorders use acoustic transmission of recorded signals via telephone systems.
  • An ECG signal is frequency modulated in the audio band of the conventional telephone line.
  • Digital mobile telephones use special filtering techniques in order to reduce the amount of transmitted data. The filtering algorithm used can recognise a non-voice sound and suppress it. Therefore, frequency modulated ECG signals are treated by the digital mobile telephone system as a single frequency unwanted noise.
  • a method of transmitting frequency modulated data signals over a digital mobile phone network which filters the transmitted data signals comprising the step of providing original said frequency modulated data signals with more than one frequency.
  • the frequency modulated data signals having more than one frequency are modulated in amplitude as well.
  • the frequency modulated data signals having more than one frequency is achieved by generating a pseudo random sequence which does not overlap the frequency band of the FM data signals and mixing the sequence with the original data frequency modulated signals.
  • the pseudo random sequence has a lower frequency band than that of the original data frequency modulated signals.
  • Fig. 1 is a diagram showing the relative frequency bands of the mixed signals in accordance with the preferred embodiment of the present invention.
  • Fig. 2 is a schematic block diagram of the circuitry used in the preferred embodiment of the present invention.
  • a mixing circuit 10 is illustrated in Fig. 2.
  • the circuit 10 includes a CPU 11 with a push-pull speaker driver 12.
  • the CPU 11 generates frequency modulated data signals FM ECG 1 and FM ECG 2 as well as a pseudo random sequence PRS having frequency bands as illustrated in Fig. 1.
  • Resistor Rl of the push-pull speaker driver 12 limits the current form the output of the CPU 20 1 1 while the PRS signal is also applied to the speaker via the resistor R2.
  • the signals FM ECG 1 and PRS are mixed at the speaker which allows for the amplitude modulation of the FM ECG 1 - FM ECG 2 signal by the lower frequency PRS signal.

Abstract

A method of transmitting frequency modulated data signals over a digital mobile phone network which filters the transmitted data signals is disclosed. The method includes the step of providing original said frequency modulated data signals with more than one frequency, whereby the frequency modulated data signals having more than one frequency are preferably also modulated in amplitude. In one form, the frequency modulated data signals having more than one frequency is achieved by generating a pseudo random sequence which does not overlap the frequency band of the FM data signals and mixing the sequence with the original data frequency modulated signals, whereby the pseudo random sequence has a lower frequency band than that of the original data frequency modulated signals.

Description

ACOUSTIC TRANSMISSION USING DIGITAL MOBILE PHONES
The present invention relates to the field of monitoring a cardiac patient's electrical cardiac activity at a central location by means of an apparatus associated with a digital mobile phone handset and transmitting the information over the digital mobile phone/ telephone network.
BACKGROUND TO THE INVENTION
Cardiac event recorders use acoustic transmission of recorded signals via telephone systems. An ECG signal is frequency modulated in the audio band of the conventional telephone line. Digital mobile telephones use special filtering techniques in order to reduce the amount of transmitted data. The filtering algorithm used can recognise a non-voice sound and suppress it. Therefore, frequency modulated ECG signals are treated by the digital mobile telephone system as a single frequency unwanted noise.
It would be advantageous to provide a method of transmitting frequency modulated ECG signals via a digital mobile phone network as this would greatly enhance the ability of a cardiac patient to be diagnosed remote from the health professionals.
OBJECT OF THE INVENTION
It is an object of the present invention to provide a method and apparatus when monitoring cardiac activity, to transmit frequency modulated signals over a digital mobile phone network. DISCLOSURE OF THE INVENTION
According to one aspect of the present invention there is disclosed a method of transmitting frequency modulated data signals over a digital mobile phone network which filters the transmitted data signals, said method comprising the step of providing original said frequency modulated data signals with more than one frequency.
Preferably the frequency modulated data signals having more than one frequency are modulated in amplitude as well. In one form of the invention, the frequency modulated data signals having more than one frequency is achieved by generating a pseudo random sequence which does not overlap the frequency band of the FM data signals and mixing the sequence with the original data frequency modulated signals.
5 Preferably, the pseudo random sequence has a lower frequency band than that of the original data frequency modulated signals.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be now be described with reference to the accompanying drawing in which:
10 Fig. 1 is a diagram showing the relative frequency bands of the mixed signals in accordance with the preferred embodiment of the present invention; and
Fig. 2 is a schematic block diagram of the circuitry used in the preferred embodiment of the present invention.
BEST MODE OF CARRYING OUT THE INVENTION
15 A mixing circuit 10 is illustrated in Fig. 2. The circuit 10 includes a CPU 11 with a push-pull speaker driver 12. The CPU 11 generates frequency modulated data signals FM ECG 1 and FM ECG 2 as well as a pseudo random sequence PRS having frequency bands as illustrated in Fig. 1.
Resistor Rl of the push-pull speaker driver 12 limits the current form the output of the CPU 20 1 1 while the PRS signal is also applied to the speaker via the resistor R2. The signals FM ECG 1 and PRS are mixed at the speaker which allows for the amplitude modulation of the FM ECG 1 - FM ECG 2 signal by the lower frequency PRS signal. The foregoing describes only one embodiment of the present invention, and modifications obvious to those skilled in the art can be made thereto without departing from the scope of the present invention.

Claims

1. A method of transmitting frequency modulated data signals over a digital mobile phone network which filters the transmitted data signals, said method includes the step of providing original said frequency modulated data signals with more than one frequency.
2. The method of transmitting frequency modulated data signals according to claim 1 , wherein the frequency modulated data signals having more than one frequency are also modulated in amplitude.
3. The method of transmitting frequency modulated data signals according to claim 1 , wherein, the frequency modulated data signals having more than one frequency is achieved by generating a pseudo random sequence which does not overlap the frequency band of the FM data signals and mixing the sequence with the original data frequency modulated signals.
4. The method of transmitting frequency modulated data signals according to claim 3, wherein the pseudo random sequence has a lower frequency band than that of the original data frequency modulated signals.
PCT/AU2000/000655 1999-06-10 2000-06-09 Acoustic transmission using digital mobile phones WO2000078065A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU50549/00A AU5054900A (en) 1999-06-10 2000-06-09 Acoustic transmission using digital mobile phones
EP00934814A EP1192814A4 (en) 1999-06-10 2000-06-09 Acoustic transmission using digital mobile phones

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPQ0884 1999-06-10
AUPQ0884A AUPQ088499A0 (en) 1999-06-10 1999-06-10 Acoustic transmission using digital mobile phones

Publications (1)

Publication Number Publication Date
WO2000078065A1 true WO2000078065A1 (en) 2000-12-21

Family

ID=3815078

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2000/000655 WO2000078065A1 (en) 1999-06-10 2000-06-09 Acoustic transmission using digital mobile phones

Country Status (3)

Country Link
EP (1) EP1192814A4 (en)
AU (1) AUPQ088499A0 (en)
WO (1) WO2000078065A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3500165B1 (en) * 2016-08-17 2021-10-06 Koninklijke Philips N.V. Adapter for coupling with medical coupling unit and sensor

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3426150A (en) * 1965-09-27 1969-02-04 Lockheed Aircraft Corp System for fm transmission of cardiological data over telephone lines
US3872252A (en) * 1973-03-07 1975-03-18 Esb Inc Apparatus for monitoring electrical signals, either artificial and/or natural in a living body, via a communication link
US3986498A (en) * 1975-09-08 1976-10-19 Videodetics Corporation Remote ECG monitoring system
US4262283A (en) * 1977-03-04 1981-04-14 The Post Office System for transmitting alarm information over telephone lines
US4694471A (en) * 1986-05-05 1987-09-15 Blesser Barry A Digital data communicating
EP0351008A2 (en) * 1988-07-13 1990-01-17 Philips Electronics Uk Limited Transmission system for sending two signals simultaneously on the same communications channel
US5458122A (en) * 1992-09-04 1995-10-17 Thomson-Csf System for wireless transmission of medical data
US5474090A (en) * 1989-01-13 1995-12-12 The Scott Fetzer Company Exercise monitoring system capable of simultaneous transmission of voice and physiological data

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4313197A (en) * 1980-04-09 1982-01-26 Bell Telephone Laboratories, Incorporated Spread spectrum arrangement for (de)multiplexing speech signals and nonspeech signals
US4425661A (en) * 1981-09-03 1984-01-10 Applied Spectrum Technologies, Inc. Data under voice communications system
US5956624A (en) * 1994-07-12 1999-09-21 Usa Digital Radio Partners Lp Method and system for simultaneously broadcasting and receiving digital and analog signals

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3426150A (en) * 1965-09-27 1969-02-04 Lockheed Aircraft Corp System for fm transmission of cardiological data over telephone lines
US3872252A (en) * 1973-03-07 1975-03-18 Esb Inc Apparatus for monitoring electrical signals, either artificial and/or natural in a living body, via a communication link
US3986498A (en) * 1975-09-08 1976-10-19 Videodetics Corporation Remote ECG monitoring system
US4262283A (en) * 1977-03-04 1981-04-14 The Post Office System for transmitting alarm information over telephone lines
US4694471A (en) * 1986-05-05 1987-09-15 Blesser Barry A Digital data communicating
EP0351008A2 (en) * 1988-07-13 1990-01-17 Philips Electronics Uk Limited Transmission system for sending two signals simultaneously on the same communications channel
US5474090A (en) * 1989-01-13 1995-12-12 The Scott Fetzer Company Exercise monitoring system capable of simultaneous transmission of voice and physiological data
US5458122A (en) * 1992-09-04 1995-10-17 Thomson-Csf System for wireless transmission of medical data

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
M.O. AL-NUAIMI, M. CHARNLEY: "Simultaneous voice and data transmission in private mobile radio using a narrowband FM channel", IEEE PROCEEDINGS, vol. 135, no. 5, October 1998 (1998-10-01), (PONTYPRIDD, UK), pages 439 - 449 *
See also references of EP1192814A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3500165B1 (en) * 2016-08-17 2021-10-06 Koninklijke Philips N.V. Adapter for coupling with medical coupling unit and sensor

Also Published As

Publication number Publication date
AUPQ088499A0 (en) 1999-07-01
EP1192814A1 (en) 2002-04-03
EP1192814A4 (en) 2005-02-16

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