WO2001039370A3 - Signal processing system and method - Google Patents

Signal processing system and method Download PDF

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Publication number
WO2001039370A3
WO2001039370A3 PCT/US2000/032599 US0032599W WO0139370A3 WO 2001039370 A3 WO2001039370 A3 WO 2001039370A3 US 0032599 W US0032599 W US 0032599W WO 0139370 A3 WO0139370 A3 WO 0139370A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal processing
processing system
engines
companders
calibrators
Prior art date
Application number
PCT/US2000/032599
Other languages
French (fr)
Other versions
WO2001039370A2 (en
Inventor
Karl M Bizjak
Mark Duncan
Original Assignee
Syfx
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 Syfx filed Critical Syfx
Priority to EP00990190A priority Critical patent/EP1254513A4/en
Priority to AU27252/01A priority patent/AU2725201A/en
Publication of WO2001039370A2 publication Critical patent/WO2001039370A2/en
Publication of WO2001039370A3 publication Critical patent/WO2001039370A3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3089—Control of digital or coded signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/007—Volume compression or expansion in amplifiers of digital or coded signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/06—Volume compression or expansion in amplifiers having semiconductor devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/005—Combinations of two or more types of control, e.g. gain control and tone control of digital or coded signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L21/0232—Processing in the frequency domain
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2227/00—Details of public address [PA] systems covered by H04R27/00 but not provided for in any of its subgroups
    • H04R2227/005—Audio distribution systems for home, i.e. multi-room use
    • 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
    • H04R25/35—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using translation techniques
    • H04R25/356—Amplitude, e.g. amplitude shift or compression
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00—Public address systems

Abstract

A signal processing system comprising companders (450), transform engines (410), calibrators (420) and statistical engines (415) for controlling the compression/expansion of input signals in accordance with at least one user-set parameter.
PCT/US2000/032599 1999-11-29 2000-11-29 Signal processing system and method WO2001039370A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP00990190A EP1254513A4 (en) 1999-11-29 2000-11-29 Signal processing system and method
AU27252/01A AU2725201A (en) 1999-11-29 2000-11-29 Signal processing system and method

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US16794499P 1999-11-29 1999-11-29
US60/167,944 1999-11-29
US23639700P 2000-09-28 2000-09-28
US60/236,397 2000-09-28

Publications (2)

Publication Number Publication Date
WO2001039370A2 WO2001039370A2 (en) 2001-05-31
WO2001039370A3 true WO2001039370A3 (en) 2002-01-24

Family

ID=26863639

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/032599 WO2001039370A2 (en) 1999-11-29 2000-11-29 Signal processing system and method

Country Status (4)

Country Link
US (9) US7558391B2 (en)
EP (1) EP1254513A4 (en)
AU (1) AU2725201A (en)
WO (1) WO2001039370A2 (en)

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