CA2611222A1 - System and method for reducing uplink noise - Google Patents

System and method for reducing uplink noise

Info

Publication number
CA2611222A1
CA2611222A1 CA002611222A CA2611222A CA2611222A1 CA 2611222 A1 CA2611222 A1 CA 2611222A1 CA 002611222 A CA002611222 A CA 002611222A CA 2611222 A CA2611222 A CA 2611222A CA 2611222 A1 CA2611222 A1 CA 2611222A1
Authority
CA
Canada
Prior art keywords
attenuation
estimated noise
threshold
filtering
adjustable
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
CA002611222A
Other languages
French (fr)
Other versions
CA2611222C (en
Inventor
George Mankaruse
Chad Seguin
Sean Simmons
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.)
BlackBerry Ltd
Original Assignee
Research in Motion Ltd
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 Research in Motion Ltd filed Critical Research in Motion Ltd
Publication of CA2611222A1 publication Critical patent/CA2611222A1/en
Application granted granted Critical
Publication of CA2611222C publication Critical patent/CA2611222C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques 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 TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques 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
    • G10L2021/03646—Stress or Lombard effect

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Noise Elimination (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

A system and method for reducing uplink noise in a mobile communications device, the system including: a noise estimator for estimating noise in proximity to the mobile communication device; an adjustable filter for receiving a signal from a microphone of the mobile communication device; an adjustable attenuation block for receiving a filtered signal from the adjustable filter; a controller configured to:
monitor the estimated noise; and adjust the adjustable filter and adjustable attenuation block based on the estimated noise. In particular, the controller may be configured to adjust the adjustable filter by increasing the depth of the filtering for higher estimated noise levels and adjust the attenuation by increasing the attenuation for higher estimated noise levels.

Claims (18)

1. A method for reducing uplink noise in a communications device, the method comprising:
receiving an input signal at the communications device;
estimating a noise level in the vicinity of the communications device;
filtering the input signal based on the estimated noise level; and applying attenuation to the filtered signal based on the estimated noise level.
2. The method of claim 1, wherein the filtering based on the estimated noise level comprises any of: shelf filtering, increasing the depth of the filtering for higher estimated noise levels or filtering according to a predetermined function.
3. The method of claim 2, wherein the predetermined function comprises applying a filter of 0dB prior to a first threshold of estimated noise level, increasing filtering in a straight-line manner, and applying a predetermined level of filtering after a second threshold of estimated noise level.
4. The method claim 3, wherein the first threshold is approximately 62 dBA and the second threshold is approximately 71 dBA.
5. The method of claim 1, wherein the applying attenuation based on the estimated noise level comprises increasing the attenuation for higher estimated noise levels or applying attenuation according to a predetermined function.
6. The method of claim 5, wherein the predetermined function comprises applying attenuation of 0dB prior to a first threshold of estimated noise level, increasing attenuation in a straight-line manner, and applying a predetermined attenuation after a second threshold of estimated noise level.
7. The method claim 6, wherein the first threshold is approximately 70 dBA and the second threshold is approximately 76 dBA.
8. A system for reducing uplink noise in a mobile communications device, the system comprising:
a noise estimator for estimating noise in proximity to the mobile communication device;
an adjustable filter for receiving a signal from a microphone of the mobile communication device;
an adjustable attenuation block for receiving a filtered signal from the adjustable filter;
a controller configured to:
monitor the estimated noise; and adjust the adjustable filter and adjustable attenuation block based on the estimated noise.
9. The system of claim 8, wherein the adjustable filter comprises a shelf filter.
10. The system of claim 8, wherein the controller is configured to adjust each of the adjustable filter and the adjustable attenuation block based on a predetermined function of the estimated noise.
11. The system of claim 8, wherein the controller is configured to adjust the adjustable filter by increasing the depth of the filtering for higher estimated noise levels or based on a predetermined function of the estimated noise.
12. The system of claim 11, wherein the predetermined function for the adjustable filter is configured to adjust the adjustable filter following a first threshold of estimated noise, to increase filtering in a straight-line manner, and to apply a predetermined attenuation after a second threshold of estimated noise.
13. The system of claim 12, wherein the first threshold is approximately 62 dBA
and the second threshold is approximately 71 dBA.
14. The system of claim 8, wherein the controller is configured to adjust the attenuation by increasing the attenuation for higher estimated noise levels or to adjust the attenuation according to a predetermined function of estimated noise level.
15. The system of claim 14, wherein the predetermined function for the adjustable attenuation block is configured to adjust the attenuation following a first threshold of estimated noise, to increase attenuation in a straight-line manner, and to apply a predetermined attenuation after a second threshold of estimated noise.
16. The system of claim 15, wherein the first threshold is approximately 70 dBA
and the second threshold is approximately 76 dBA.
17. A computer readable medium storing instructions that, when executed on a processor, cause the processor to perform the method of any one of claims 1 to 7.
18. A communication device having the system of any one of claims 8 to 16.
CA2611222A 2006-11-24 2007-11-19 System and method for reducing uplink noise Active CA2611222C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06124725.0 2006-11-24
EP06124725A EP1926085B1 (en) 2006-11-24 2006-11-24 System and method for reducing uplink noise

Publications (2)

Publication Number Publication Date
CA2611222A1 true CA2611222A1 (en) 2008-05-24
CA2611222C CA2611222C (en) 2011-12-20

Family

ID=37963624

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2611222A Active CA2611222C (en) 2006-11-24 2007-11-19 System and method for reducing uplink noise

Country Status (6)

Country Link
EP (1) EP1926085B1 (en)
CN (1) CN101222235B (en)
AT (1) ATE487214T1 (en)
CA (1) CA2611222C (en)
DE (1) DE602006018030D1 (en)
SG (1) SG143204A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114650072A (en) * 2022-03-24 2022-06-21 维沃移动通信有限公司 Signal processing method, signal processing apparatus, electronic device, and readable storage medium

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9058819B2 (en) 2006-11-24 2015-06-16 Blackberry Limited System and method for reducing uplink noise
EP2232703B1 (en) 2007-12-20 2014-06-18 Telefonaktiebolaget LM Ericsson (publ) Noise suppression method and apparatus
WO2009082302A1 (en) * 2007-12-20 2009-07-02 Telefonaktiebolaget L M Ericsson (Publ) Noise suppression method and apparatus
KR101475864B1 (en) 2008-11-13 2014-12-23 삼성전자 주식회사 Apparatus and method for eliminating noise
GB2519117A (en) 2013-10-10 2015-04-15 Nokia Corp Speech processing
US10157627B1 (en) 2017-06-02 2018-12-18 Bose Corporation Dynamic spectral filtering
CN117040625B (en) * 2023-09-26 2023-12-08 福建金石电子有限公司 5G-based noise control method and system for optical fiber distribution system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3626492B2 (en) * 1993-07-07 2005-03-09 ポリコム・インコーポレイテッド Reduce background noise to improve conversation quality
WO2001089184A1 (en) 2000-05-18 2001-11-22 Ericsson Inc. Noise-adaptive communications signal gain
US20060126859A1 (en) * 2003-01-31 2006-06-15 Claus Elberling Sound system improving speech intelligibility
CN100426378C (en) * 2005-08-04 2008-10-15 北京中星微电子有限公司 Dynamic noise eliminating method and digital filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114650072A (en) * 2022-03-24 2022-06-21 维沃移动通信有限公司 Signal processing method, signal processing apparatus, electronic device, and readable storage medium
CN114650072B (en) * 2022-03-24 2024-04-09 维沃移动通信有限公司 Signal processing method, signal processing device, electronic apparatus, and readable storage medium

Also Published As

Publication number Publication date
DE602006018030D1 (en) 2010-12-16
CN101222235B (en) 2012-07-04
SG143204A1 (en) 2008-06-27
EP1926085B1 (en) 2010-11-03
CA2611222C (en) 2011-12-20
CN101222235A (en) 2008-07-16
EP1926085A1 (en) 2008-05-28
ATE487214T1 (en) 2010-11-15

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