CA2382358A1 - Digital quasi-rms detector - Google Patents

Digital quasi-rms detector Download PDF

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Publication number
CA2382358A1
CA2382358A1 CA002382358A CA2382358A CA2382358A1 CA 2382358 A1 CA2382358 A1 CA 2382358A1 CA 002382358 A CA002382358 A CA 002382358A CA 2382358 A CA2382358 A CA 2382358A CA 2382358 A1 CA2382358 A1 CA 2382358A1
Authority
CA
Canada
Prior art keywords
signal
rms
rms detector
digital quasi
estimated present
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.)
Granted
Application number
CA002382358A
Other languages
French (fr)
Other versions
CA2382358C (en
Inventor
Stephen Wade Armstrong
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.)
Gennum Corp
Original Assignee
Gennum 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 Gennum Corp filed Critical Gennum Corp
Publication of CA2382358A1 publication Critical patent/CA2382358A1/en
Application granted granted Critical
Publication of CA2382358C publication Critical patent/CA2382358C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/505—Customised settings for obtaining desired overall acoustical characteristics using digital signal processing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/02—Measuring effective values, i.e. root-mean-square values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/04—Measuring form factor, i.e. quotient of root-mean-square value and arithmetic mean of instantaneous value; Measuring peak factor, i.e. quotient of maximum value and root-mean-square value

Abstract

A digital quasi-RMS detector is provided that approximates the time-varying RMS energy of a signal. The digital quasi-RMS detector rectifies the signal and compares the rectified signal with an estimated present energy value of the audio signal.
If the difference between the rectified signal and the estimated present energy value is not greater than zero, then the digital quasi-RMS detector multiplies the rectified signal by a first time constant to generate a first filtered signal and sums the first filter signal with the estimated present energy value to determine the approximate RMS
energy. If the difference between the rectified signal and the estimated present energy is greater than zero, however, then the digital quasi-RMS detector multiplies the rectified signal by a second time constant to generate a second filtered signal and sums the second filtered signal with the estimated present energy value to determine the approximate RMS
energy.
CA002382358A 2001-04-18 2002-04-18 Digital quasi-rms detector Expired - Fee Related CA2382358C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US28446001P 2001-04-18 2001-04-18
US60/284,460 2001-04-18

Publications (2)

Publication Number Publication Date
CA2382358A1 true CA2382358A1 (en) 2002-10-18
CA2382358C CA2382358C (en) 2007-01-09

Family

ID=23090305

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002382358A Expired - Fee Related CA2382358C (en) 2001-04-18 2002-04-18 Digital quasi-rms detector

Country Status (5)

Country Link
US (1) US7076073B2 (en)
EP (1) EP1251355B1 (en)
AT (1) ATE380347T1 (en)
CA (1) CA2382358C (en)
DE (1) DE60223869D1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007533180A (en) * 2004-04-09 2007-11-15 オーディオアシクス エー／エス Sigma delta modulator
US7706473B2 (en) * 2006-03-24 2010-04-27 Freescale Semiconductor, Inc. Comparative signal strength detection
US20080170712A1 (en) * 2007-01-16 2008-07-17 Phonic Ear Inc. Sound amplification system
CN102280107B (en) * 2010-06-10 2013-01-23 华为技术有限公司 Sideband residual signal generating method and device
US8559198B2 (en) * 2011-06-08 2013-10-15 The Boeing Company High yield AC-AC power converter and method therefor
CN102610232B (en) * 2012-01-10 2013-06-19 天津大学 Method for adjusting self-adaptive audio sensing loudness
CN105102992A (en) * 2013-12-02 2015-11-25 智能能源仪器公司 Methods and devices for determining root mean square of a delta-sigma modulated signal
US9699572B2 (en) * 2015-05-27 2017-07-04 Starkey Laboratories, Inc. Method and apparatus for suppressing transient sounds in hearing assistance devices
US9693153B2 (en) * 2015-05-27 2017-06-27 Starkey Laboratories, Inc. Method and apparatus for suppressing transient sounds in hearing assistance devices
SG10202106125YA (en) 2016-12-13 2021-07-29 QSIC Pty Ltd Sound management method and system
US11641183B2 (en) * 2018-10-25 2023-05-02 Ear Physics, Llc Audio dynamics processing control system with integration release window

Family Cites Families (93)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1592168A (en) * 1976-11-29 1981-07-01 Oticon Electronics As Hearing aids
DE2658301C2 (en) * 1976-12-22 1978-12-07 Siemens Ag, 1000 Berlin Und 8000 Muenchen Hearing aid
DE2716336B1 (en) * 1977-04-13 1978-07-06 Siemens Ag Procedure and hearing aid for the compensation of hearing defects
US4113997A (en) * 1977-07-12 1978-09-12 Communications Satellite, Corporation Analog to digital signal of logarithmic format converter and analog to pseudo-rms value converter and echo canceller utilizing same
DE2908999C2 (en) * 1979-03-08 1982-06-09 Siemens AG, 1000 Berlin und 8000 München Method for generating acoustic speech signals which are understandable for the extremely hard of hearing and device for carrying out this method
US4403118A (en) * 1980-04-25 1983-09-06 Siemens Aktiengesellschaft Method for generating acoustical speech signals which can be understood by persons extremely hard of hearing and a device for the implementation of said method
DE3131193A1 (en) * 1981-08-06 1983-02-24 Siemens AG, 1000 Berlin und 8000 München DEVICE FOR COMPENSATING HEALTH DAMAGE
DK546581A (en) 1981-12-10 1983-06-11 Danavox As PROCEDURE FOR ADAPTING THE TRANSFER FUNCTION IN A HEARING DEVICE FOR VARIOUS HEARING DEFECTS AND HEARING DEVICE FOR EXERCISING THE PROCEDURE
DE3205686A1 (en) * 1982-02-17 1983-08-25 Robert Bosch Gmbh, 7000 Stuttgart HOERGERAET
DE3205685A1 (en) * 1982-02-17 1983-08-25 Robert Bosch Gmbh, 7000 Stuttgart HOERGERAET
US4689818A (en) * 1983-04-28 1987-08-25 Siemens Hearing Instruments, Inc. Resonant peak control
US4592087B1 (en) * 1983-12-08 1996-08-13 Knowles Electronics Inc Class D hearing aid amplifier
US4653216A (en) * 1984-04-13 1987-03-31 Daiwa Seiko Inc. Tube for fishing rod
US4696032A (en) * 1985-02-26 1987-09-22 Siemens Corporate Research & Support, Inc. Voice switched gain system
ATE53735T1 (en) * 1985-10-16 1990-06-15 Siemens Ag HEARING AID.
DE8529437U1 (en) * 1985-10-16 1987-06-11 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
US5029217A (en) * 1986-01-21 1991-07-02 Harold Antin Digital hearing enhancement apparatus
US4947432B1 (en) * 1986-02-03 1993-03-09 Programmable hearing aid
US4750207A (en) * 1986-03-31 1988-06-07 Siemens Hearing Instruments, Inc. Hearing aid noise suppression system
DE3734946A1 (en) * 1987-10-15 1989-05-03 Siemens Ag HEARING DEVICE WITH POSSIBILITY TO TELEPHONE
US4887299A (en) 1987-11-12 1989-12-12 Nicolet Instrument Corporation Adaptive, programmable signal processing hearing aid
DE3802903A1 (en) 1988-02-01 1989-08-10 Siemens Ag LANGUAGE TRANSFER DEVICE
US4852175A (en) 1988-02-03 1989-07-25 Siemens Hearing Instr Inc Hearing aid signal-processing system
US4882762A (en) * 1988-02-23 1989-11-21 Resound Corporation Multi-band programmable compression system
US5111419A (en) * 1988-03-23 1992-05-05 Central Institute For The Deaf Electronic filters, signal conversion apparatus, hearing aids and methods
US4989251A (en) * 1988-05-10 1991-01-29 Diaphon Development Ab Hearing aid programming interface and method
US4868880A (en) * 1988-06-01 1989-09-19 Yale University Method and device for compensating for partial hearing loss
DE3834962A1 (en) * 1988-10-13 1990-04-19 Siemens Ag DIGITAL PROGRAMMING DEVICE FOR HOUR DEVICES
US5027410A (en) * 1988-11-10 1991-06-25 Wisconsin Alumni Research Foundation Adaptive, programmable signal processing and filtering for hearing aids
DE3900588A1 (en) * 1989-01-11 1990-07-19 Toepholm & Westermann REMOTE CONTROLLED, PROGRAMMABLE HOUR DEVICE SYSTEM
JPH02192300A (en) 1989-01-19 1990-07-30 Citizen Watch Co Ltd Digital gain control circuit for hearing aid
US4947433A (en) * 1989-03-29 1990-08-07 Siemens Hearing Instruments, Inc. Circuit for use in programmable hearing aids
FR2650395B1 (en) * 1989-07-31 1991-09-27 Merlin Gerin DEVICE FOR MEASURING THE EFFECTIVE VALUE OF A SIGNAL, PARTICULARLY FOR MEASURING CURRENT IN A STATIC TRIGGER
DK164349C (en) * 1989-08-22 1992-11-02 Oticon As HEARING DEVICE WITH BACKUP COMPENSATION
NO169689C (en) * 1989-11-30 1992-07-22 Nha As PROGRAMMABLE HYBRID HEARING DEVICE WITH DIGITAL SIGNAL TREATMENT AND PROCEDURE FOR DETECTION AND SIGNAL TREATMENT AT THE SAME.
DE59008542D1 (en) 1990-07-25 1995-03-30 Siemens Audiologische Technik Hearing aid circuit with an output stage with a limiting device.
ATE116091T1 (en) * 1990-10-12 1995-01-15 Siemens Audiologische Technik HEARING AID WITH A DATA MEMORY.
EP0495328B1 (en) 1991-01-15 1996-07-17 International Business Machines Corporation Sigma delta converter
US5278912A (en) * 1991-06-28 1994-01-11 Resound Corporation Multiband programmable compression system
US5247581A (en) * 1991-09-27 1993-09-21 Exar Corporation Class-d bicmos hearing aid output amplifier
US5389829A (en) * 1991-09-27 1995-02-14 Exar Corporation Output limiter for class-D BICMOS hearing aid output amplifier
US5189006A (en) * 1991-11-06 1993-02-23 Philip Morris Incorporated Palladium-tin catalysts for acyloxylation of alkylaromatic compounds
US5347587A (en) * 1991-11-20 1994-09-13 Sharp Kabushiki Kaisha Speaker driving device
DE9321583U1 (en) * 1992-02-27 2000-05-25 Siemens Audiologische Technik Hearing aid worn on the head
US5241310A (en) * 1992-03-02 1993-08-31 General Electric Company Wide dynamic range delta sigma analog-to-digital converter with precise gain tracking
ATE132683T1 (en) * 1992-06-29 1996-01-15 Siemens Audiologische Technik HEARING AID
US5448644A (en) * 1992-06-29 1995-09-05 Siemens Audiologische Technik Gmbh Hearing aid
EP0597523B1 (en) 1992-11-09 1997-07-23 Koninklijke Philips Electronics N.V. Digital-to-analog converter
DE4321788C1 (en) * 1993-06-30 1994-08-18 Siemens Audiologische Technik Interface for serial data transmission between a hearing aid and a control device
US5376892A (en) * 1993-07-26 1994-12-27 Texas Instruments Incorporated Sigma delta saturation detector and soft resetting circuit
US5608803A (en) * 1993-08-05 1997-03-04 The University Of New Mexico Programmable digital hearing aid
US5450268A (en) * 1993-08-11 1995-09-12 Square D Company Method and apparatus for RMS current approximation
US5412734A (en) * 1993-09-13 1995-05-02 Thomasson; Samuel L. Apparatus and method for reducing acoustic feedback
US5651071A (en) 1993-09-17 1997-07-22 Audiologic, Inc. Noise reduction system for binaural hearing aid
US5479522A (en) * 1993-09-17 1995-12-26 Audiologic, Inc. Binaural hearing aid
EP0585976A3 (en) 1993-11-10 1994-06-01 Phonak Ag Hearing aid with cancellation of acoustic feedback
DE4340817A1 (en) * 1993-12-01 1995-06-08 Toepholm & Westermann Circuit arrangement for the automatic control of hearing aids
US5561814A (en) * 1993-12-22 1996-10-01 Intel Corporation Methods and apparatus for determining memory operating characteristics for given memory locations via assigned address ranges
EP0674463A1 (en) * 1994-03-23 1995-09-27 Siemens Audiologische Technik GmbH Programmable hearing aid
EP0674464A1 (en) * 1994-03-23 1995-09-27 Siemens Audiologische Technik GmbH Programmable hearing aid with fuzzy logic controller
EP0676909A1 (en) * 1994-03-31 1995-10-11 Siemens Audiologische Technik GmbH Programmable hearing aid
DK0681411T3 (en) * 1994-05-06 2003-05-19 Siemens Audiologische Technik Programmable hearing aid
US5500902A (en) * 1994-07-08 1996-03-19 Stockham, Jr.; Thomas G. Hearing aid device incorporating signal processing techniques
EP0712261A1 (en) * 1994-11-10 1996-05-15 Siemens Audiologische Technik GmbH Programmable hearing aid
DE4441996A1 (en) * 1994-11-26 1996-05-30 Toepholm & Westermann Hearing aid
JPH08265468A (en) 1995-03-20 1996-10-11 Brother Ind Ltd Facsimile equipment
US5862238A (en) * 1995-09-11 1999-01-19 Starkey Laboratories, Inc. Hearing aid having input and output gain compression circuits
AU7118696A (en) 1995-10-10 1997-04-30 Audiologic, Inc. Digital signal processing hearing aid with processing strategy selection
US5719524A (en) * 1995-10-11 1998-02-17 Telcom Semiconductor, Inc. Circuit having an input terminal for controlling two functions
DE19545760C1 (en) * 1995-12-07 1997-02-20 Siemens Audiologische Technik Digital hearing aid
DE19611026C2 (en) * 1996-03-20 2001-09-20 Siemens Audiologische Technik Distortion suppression in hearing aids with AGC
EP0798947A1 (en) * 1996-03-27 1997-10-01 Siemens Audiologische Technik GmbH Method and circuit for data processing, in particular for signal data in a digital progammable hearing aid
US5719528A (en) 1996-04-23 1998-02-17 Phonak Ag Hearing aid device
US6108431A (en) * 1996-05-01 2000-08-22 Phonak Ag Loudness limiter
DE29608215U1 (en) * 1996-05-06 1996-08-01 Siemens Audiologische Technik Electric hearing aid
US5815102A (en) * 1996-06-12 1998-09-29 Audiologic, Incorporated Delta sigma pwm dac to reduce switching
EP0814635B1 (en) * 1996-06-21 2002-10-02 Siemens Audiologische Technik GmbH Hearing aid
EP0814636A1 (en) * 1996-06-21 1997-12-29 Siemens Audiologische Technik GmbH Hearing aid
US5896101A (en) * 1996-09-16 1999-04-20 Audiologic Hearing Systems, L.P. Wide dynamic range delta sigma A/D converter
EP0845921A1 (en) * 1996-10-23 1998-06-03 Siemens Audiologische Technik GmbH Method and circuit for regulating the volume in digital hearing aids
JP2904272B2 (en) 1996-12-10 1999-06-14 日本電気株式会社 Digital hearing aid and hearing aid processing method thereof
US6044162A (en) * 1996-12-20 2000-03-28 Sonic Innovations, Inc. Digital hearing aid using differential signal representations
DE19703228B4 (en) * 1997-01-29 2006-08-03 Siemens Audiologische Technik Gmbh Method for amplifying input signals of a hearing aid and circuit for carrying out the method
US5836801A (en) * 1997-03-12 1998-11-17 Lin; Kuo Jung Climbing toy device
US6236731B1 (en) * 1997-04-16 2001-05-22 Dspfactory Ltd. Filterbank structure and method for filtering and separating an information signal into different bands, particularly for audio signal in hearing aids
US6240192B1 (en) * 1997-04-16 2001-05-29 Dspfactory Ltd. Apparatus for and method of filtering in an digital hearing aid, including an application specific integrated circuit and a programmable digital signal processor
DE19720651C2 (en) * 1997-05-16 2001-07-12 Siemens Audiologische Technik Hearing aid with various assemblies for recording, processing and adapting a sound signal to the hearing ability of a hearing impaired person
US6049616A (en) * 1997-06-17 2000-04-11 Weiner; Keith Dynamic range restorer and method
US6049618A (en) 1997-06-30 2000-04-11 Siemens Hearing Instruments, Inc. Hearing aid having input AGC and output AGC
EP0917398B1 (en) * 1997-11-12 2007-04-11 Siemens Audiologische Technik GmbH Hearing aid and method of setting audiological/acoustical parameters
EP1198974B1 (en) * 1999-08-03 2003-06-04 Widex A/S Hearing aid with adaptive matching of microphones
US6633202B2 (en) * 2001-04-12 2003-10-14 Gennum Corporation Precision low jitter oscillator circuit
US6937738B2 (en) * 2001-04-12 2005-08-30 Gennum Corporation Digital hearing aid system

Also Published As

Publication number Publication date
DE60223869D1 (en) 2008-01-17
CA2382358C (en) 2007-01-09
ATE380347T1 (en) 2007-12-15
US7076073B2 (en) 2006-07-11
EP1251355B1 (en) 2007-12-05
US20030012393A1 (en) 2003-01-16
EP1251355A3 (en) 2003-08-13
EP1251355A2 (en) 2002-10-23

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