AU5724698A - System and method for modifying voice signals to avoid triggering tone detectors - Google Patents

System and method for modifying voice signals to avoid triggering tone detectors

Info

Publication number
AU5724698A
AU5724698A AU57246/98A AU5724698A AU5724698A AU 5724698 A AU5724698 A AU 5724698A AU 57246/98 A AU57246/98 A AU 57246/98A AU 5724698 A AU5724698 A AU 5724698A AU 5724698 A AU5724698 A AU 5724698A
Authority
AU
Australia
Prior art keywords
voice signals
avoid triggering
tone detectors
modifying voice
triggering tone
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.)
Abandoned
Application number
AU57246/98A
Inventor
William C. Hardy
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.)
MCI Communications Corp
Original Assignee
MCI Communications Corp
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 MCI Communications Corp filed Critical MCI Communications Corp
Publication of AU5724698A publication Critical patent/AU5724698A/en
Abandoned 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
    • H04Q1/46—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
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • 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
AU57246/98A 1996-12-23 1997-12-23 System and method for modifying voice signals to avoid triggering tone detectors Abandoned AU5724698A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US77265396A 1996-12-23 1996-12-23
US08772653 1996-12-23
PCT/US1997/024077 WO1998028894A1 (en) 1996-12-23 1997-12-23 System and method for modifying voice signals to avoid triggering tone detectors

Publications (1)

Publication Number Publication Date
AU5724698A true AU5724698A (en) 1998-07-17

Family

ID=25095772

Family Applications (1)

Application Number Title Priority Date Filing Date
AU57246/98A Abandoned AU5724698A (en) 1996-12-23 1997-12-23 System and method for modifying voice signals to avoid triggering tone detectors

Country Status (2)

Country Link
AU (1) AU5724698A (en)
WO (1) WO1998028894A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5325204A (en) * 1992-05-14 1994-06-28 Hitachi America, Ltd. Narrowband interference cancellation through the use of digital recursive notch filters
US5438618A (en) * 1993-11-15 1995-08-01 Mytech Systems Corporation Vocal frequency suppression apparatus and method
US5483577A (en) * 1994-01-24 1996-01-09 Advanced Micro Devices, Inc. Single chip telephone answering machine, telephone, speakerphone, and ADSI controller
US5583933A (en) * 1994-08-05 1996-12-10 Mark; Andrew R. Method and apparatus for the secure communication of data

Also Published As

Publication number Publication date
WO1998028894A1 (en) 1998-07-02

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