WO2002025886A8 - Digital signal processing techniques for improving audio clarity and intelligibility - Google Patents

Digital signal processing techniques for improving audio clarity and intelligibility

Info

Publication number
WO2002025886A8
WO2002025886A8 PCT/US2001/029552 US0129552W WO0225886A8 WO 2002025886 A8 WO2002025886 A8 WO 2002025886A8 US 0129552 W US0129552 W US 0129552W WO 0225886 A8 WO0225886 A8 WO 0225886A8
Authority
WO
WIPO (PCT)
Prior art keywords
intelligibility
signal processing
digital signal
processing techniques
signal
Prior art date
Application number
PCT/US2001/029552
Other languages
French (fr)
Other versions
WO2002025886A1 (en
Inventor
Leif Claesson
Keith Mcmillen
Richard Hodges
Timothy J Carroll
Original Assignee
Octiv Inc
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
Priority claimed from US09/669,069 external-priority patent/US6940987B2/en
Application filed by Octiv Inc filed Critical Octiv Inc
Priority to AU2001292908A priority Critical patent/AU2001292908A1/en
Priority to EP01973315A priority patent/EP1325601A4/en
Priority to JP2002528975A priority patent/JP2004509378A/en
Publication of WO2002025886A1 publication Critical patent/WO2002025886A1/en
Publication of WO2002025886A8 publication Critical patent/WO2002025886A8/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/0204—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders using subband decomposition
    • G10L19/0208—Subband vocoders
    • 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
    • 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
    • G10L21/0316—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
    • G10L21/0364—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude for improving intelligibility
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/0204—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders using subband decomposition

Abstract

Methods and apparatus are described for effecting multi-band processing of an original sampled signal. The original sampled signal is separated (44) into a plurality of signal components each corresponding to one of a plurality of frequency bands wherein each band is independently processed (60, 62, 64). A dynamic range associated with each one of the plurality of signal components is independently and dynamically controlled (52). At least one signal level associated with the plurality of signal components is modified (46, 48, 50, 58). The signal components are combined (66) into a processed sampled signal.
PCT/US2001/029552 2000-09-22 2001-09-19 Digital signal processing techniques for improving audio clarity and intelligibility WO2002025886A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2001292908A AU2001292908A1 (en) 2000-09-22 2001-09-19 Digital signal processing techniques for improving audio clarity and intelligibility
EP01973315A EP1325601A4 (en) 2000-12-20 2001-09-19 Digital signal processing techniques for improving audio clarity and intelligibility
JP2002528975A JP2004509378A (en) 2000-12-20 2001-09-19 Digital signal processing techniques to improve audio clarity and intelligibility

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US09/669,069 2000-09-22
US09/669,069 US6940987B2 (en) 1999-12-31 2000-12-20 Techniques for improving audio clarity and intelligibility at reduced bit rates over a digital network
US28993601P 2001-05-09 2001-05-09
US60/289,936 2001-05-09
US29368401P 2001-05-25 2001-05-25
US60/293,684 2001-05-25
US09/927,578 US20020075965A1 (en) 2000-12-20 2001-08-06 Digital signal processing techniques for improving audio clarity and intelligibility
US09/927,578 2001-08-06

Publications (2)

Publication Number Publication Date
WO2002025886A1 WO2002025886A1 (en) 2002-03-28
WO2002025886A8 true WO2002025886A8 (en) 2002-08-01

Family

ID=27501517

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/029552 WO2002025886A1 (en) 2000-09-22 2001-09-19 Digital signal processing techniques for improving audio clarity and intelligibility

Country Status (5)

Country Link
US (1) US20020075965A1 (en)
EP (1) EP1325601A4 (en)
JP (1) JP2004509378A (en)
AU (1) AU2001292908A1 (en)
WO (1) WO2002025886A1 (en)

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US20040019527A1 (en) * 2002-07-24 2004-01-29 Guglielmucci Luis Felipe System for the sale of recorded media through the internet adapted to the acoustic print and replay system set up of the customer
US20040019520A1 (en) * 2002-07-24 2004-01-29 Guglielmucci Luis Felipe Business model for the sale of recorded media through the Internet and other distribution channels adapted to the acoustic print and/or replay system set up of the customer
US7903825B1 (en) 2006-03-03 2011-03-08 Cirrus Logic, Inc. Personal audio playback device having gain control responsive to environmental sounds
US20100303046A1 (en) * 2009-05-27 2010-12-02 Netstreams, Llc Wireless video and audio network distribution system
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GB2563687B (en) 2017-06-19 2019-11-20 Cirrus Logic Int Semiconductor Ltd Audio test mode
US10911013B2 (en) 2018-07-05 2021-02-02 Comcast Cable Communications, Llc Dynamic audio normalization process

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Also Published As

Publication number Publication date
WO2002025886A1 (en) 2002-03-28
JP2004509378A (en) 2004-03-25
US20020075965A1 (en) 2002-06-20
EP1325601A4 (en) 2005-11-09
EP1325601A1 (en) 2003-07-09
AU2001292908A1 (en) 2002-04-02

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