EP1953739A3 - Method and device for reducing noise - Google Patents

Method and device for reducing noise Download PDF

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Publication number
EP1953739A3
EP1953739A3 EP08008031A EP08008031A EP1953739A3 EP 1953739 A3 EP1953739 A3 EP 1953739A3 EP 08008031 A EP08008031 A EP 08008031A EP 08008031 A EP08008031 A EP 08008031A EP 1953739 A3 EP1953739 A3 EP 1953739A3
Authority
EP
European Patent Office
Prior art keywords
signal portion
decoded signal
energy envelope
envelope generating
tdac
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
EP08008031A
Other languages
German (de)
French (fr)
Other versions
EP1953739A2 (en
EP1953739B1 (en
Inventor
Martin Gartner
Stefan Schandl
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.)
Siemens AG
Original Assignee
Siemens AG
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 DE102005019863A external-priority patent/DE102005019863A1/en
Priority claimed from DE200510032079 external-priority patent/DE102005032079A1/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1953739A2 publication Critical patent/EP1953739A2/en
Publication of EP1953739A3 publication Critical patent/EP1953739A3/en
Application granted granted Critical
Publication of EP1953739B1 publication Critical patent/EP1953739B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • 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
    • G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
    • G10L19/025—Detection of transients or attacks for time/frequency resolution switching
    • 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
    • G10L19/04—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 predictive techniques
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
    • 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
    • G10L19/04—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 predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
    • 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

Abstract

A noise suppression process comprising a first decoded signal portion (S CELP) and a second decoded signal portion (S TDAC) which involves determining a first energy envelope generating curve (ENV CELP) and a second energy envelope generating curve (ENV TDAC) of the first signal portion and of the second decoded signal portion. The process then involves forming an identification number (R) depending on a comparison of the first and second energy envelope generating curves, deriving an amplification factor (G) which depends on the identification number. An independent claim is also included for the device e.g. communication equipment.
EP08008031.0A 2005-04-28 2006-04-12 Method and device for reducing noise in a decoded signal Not-in-force EP1953739B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102005019863A DE102005019863A1 (en) 2005-04-28 2005-04-28 Noise suppression process for decoded signal comprise first and second decoded signal portion and involves determining a first energy envelope generating curve, forming an identification number, deriving amplification factor
DE102005028182 2005-06-17
DE200510032079 DE102005032079A1 (en) 2005-07-08 2005-07-08 Noise suppression process for decoded signal comprise first and second decoded signal portion and involves determining a first energy envelope generating curve, forming an identification number, deriving amplification factor
EP06725716A EP1869671B1 (en) 2005-04-28 2006-04-12 Noise suppression process and device

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP06725716A Division EP1869671B1 (en) 2005-04-28 2006-04-12 Noise suppression process and device

Publications (3)

Publication Number Publication Date
EP1953739A2 EP1953739A2 (en) 2008-08-06
EP1953739A3 true EP1953739A3 (en) 2008-10-08
EP1953739B1 EP1953739B1 (en) 2014-06-04

Family

ID=36621841

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06725716A Not-in-force EP1869671B1 (en) 2005-04-28 2006-04-12 Noise suppression process and device
EP08008031.0A Not-in-force EP1953739B1 (en) 2005-04-28 2006-04-12 Method and device for reducing noise in a decoded signal

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP06725716A Not-in-force EP1869671B1 (en) 2005-04-28 2006-04-12 Noise suppression process and device

Country Status (11)

Country Link
US (1) US8612236B2 (en)
EP (2) EP1869671B1 (en)
JP (1) JP4819881B2 (en)
KR (1) KR100915726B1 (en)
AT (1) ATE435481T1 (en)
CA (1) CA2574468C (en)
DE (1) DE502006004136D1 (en)
DK (1) DK1869671T3 (en)
ES (1) ES2327566T3 (en)
PL (1) PL1869671T3 (en)
WO (1) WO2006114368A1 (en)

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US20090006081A1 (en) * 2007-06-27 2009-01-01 Samsung Electronics Co., Ltd. Method, medium and apparatus for encoding and/or decoding signal
CN102160114B (en) * 2008-09-17 2012-08-29 法国电信公司 Method and device of pre-echo attenuation in a digital audio signal
JP5295380B2 (en) 2009-10-20 2013-09-18 パナソニック株式会社 Encoding device, decoding device and methods thereof
CA2778382C (en) * 2009-10-20 2016-01-05 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Audio signal encoder, audio signal decoder, method for encoding or decoding an audio signal using an aliasing-cancellation
CN102859588B (en) * 2009-10-20 2014-09-10 弗兰霍菲尔运输应用研究公司 Audio signal encoder, audio signal decoder, method for providing an encoded representation of an audio content, and method for providing a decoded representation of an audio content
US9838784B2 (en) 2009-12-02 2017-12-05 Knowles Electronics, Llc Directional audio capture
US8798290B1 (en) 2010-04-21 2014-08-05 Audience, Inc. Systems and methods for adaptive signal equalization
US9558755B1 (en) 2010-05-20 2017-01-31 Knowles Electronics, Llc Noise suppression assisted automatic speech recognition
CN101908342B (en) * 2010-07-23 2012-09-26 北京理工大学 Method for inhibiting pre-echoes of audio transient signals by utilizing frequency domain filtering post-processing
US8615394B1 (en) * 2012-01-27 2013-12-24 Audience, Inc. Restoration of noise-reduced speech
US9536540B2 (en) 2013-07-19 2017-01-03 Knowles Electronics, Llc Speech signal separation and synthesis based on auditory scene analysis and speech modeling
CN107112025A (en) 2014-09-12 2017-08-29 美商楼氏电子有限公司 System and method for recovering speech components
WO2016123560A1 (en) 2015-01-30 2016-08-04 Knowles Electronics, Llc Contextual switching of microphones
US9820042B1 (en) 2016-05-02 2017-11-14 Knowles Electronics, Llc Stereo separation and directional suppression with omni-directional microphones

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US5825320A (en) * 1996-03-19 1998-10-20 Sony Corporation Gain control method for audio encoding device
US6169971B1 (en) * 1997-12-03 2001-01-02 Glenayre Electronics, Inc. Method to suppress noise in digital voice processing
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Also Published As

Publication number Publication date
EP1869671B1 (en) 2009-07-01
CA2574468C (en) 2014-01-14
DK1869671T3 (en) 2009-10-19
ES2327566T3 (en) 2009-10-30
JP4819881B2 (en) 2011-11-24
KR100915726B1 (en) 2009-09-04
WO2006114368A1 (en) 2006-11-02
PL1869671T3 (en) 2009-12-31
US8612236B2 (en) 2013-12-17
US20070282604A1 (en) 2007-12-06
JP2008539456A (en) 2008-11-13
ATE435481T1 (en) 2009-07-15
EP1953739A2 (en) 2008-08-06
DE502006004136D1 (en) 2009-08-13
CA2574468A1 (en) 2006-11-02
EP1869671A1 (en) 2007-12-26
EP1953739B1 (en) 2014-06-04
KR20070062493A (en) 2007-06-15

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