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WO2018147573A1 - Écouteur à élimination de bruit utilisant des caractéristiques de réception de son en provenance d'un microphone intra-auriculaire et d'un microphone sur l'oreille et procédé d'élimination de bruit - Google Patents

Écouteur à élimination de bruit utilisant des caractéristiques de réception de son en provenance d'un microphone intra-auriculaire et d'un microphone sur l'oreille et procédé d'élimination de bruit Download PDF

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Publication number
WO2018147573A1
WO2018147573A1 PCT/KR2018/001020 KR2018001020W WO2018147573A1 WO 2018147573 A1 WO2018147573 A1 WO 2018147573A1 KR 2018001020 W KR2018001020 W KR 2018001020W WO 2018147573 A1 WO2018147573 A1 WO 2018147573A1
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WO
WIPO (PCT)
Prior art keywords
ear microphone
noise
voice
ear
microphone
Prior art date
Application number
PCT/KR2018/001020
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English (en)
Korean (ko)
Inventor
김은동
Original Assignee
주식회사 오르페오사운드웍스
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.)
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Publication date
Application filed by 주식회사 오르페오사운드웍스 filed Critical 주식회사 오르페오사운드웍스
Publication of WO2018147573A1 publication Critical patent/WO2018147573A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1083—Reduction of ambient noise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • 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
    • 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
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones

Definitions

  • the present invention relates to a noise reduction technique of an earset. More specifically, the present invention relates to a technology for removing noise and leaving only a user's voice by using a difference in sound absorption characteristics of microphones provided inside and outside, and an ear set to which the corresponding technology is applied.
  • the ear set may be in the form of an earphone or a headphone, and generally includes two speakers and one microphone (hereinafter referred to as a microphone).
  • the earset is defined to include earphones, headphones, a headset, and the like.
  • Such a configuration for example, enables music to be played through a speaker and a microphone when a call comes in while listening to music while the earphone is connected to the smartphone.
  • the microphone does not operate when playing music, and when the call function is selected, the smartphone stops playing the music and activates the microphone to transmit the user's voice to the call counterpart.
  • the other party's voice is played back through the speaker of the ear set to the user.
  • the out-ear microphone attached to the earset has a problem in that call quality is degraded because ambient noise is mixed with the user's voice.
  • in-ear microphones also have limitations that cannot completely block out noise. That is, the noise may be input according to the shape of the earset, the wearing state of the earset, or the like, and the noise may be input in a very noisy place such as a performance hall. As a result, there is a problem that the user's voice is mixed with noise and not properly delivered to the other party.
  • the present invention was developed to solve the above problems of the prior art, an object of the present invention can clearly output only the user's voice by correcting the noise input to the in-ear microphone and the out-ear microphone mutually after the actual noise.
  • the present invention provides a noise canceling earset and a noise canceling method using an in-ear microphone and an out-ear microphone sound receiving characteristic.
  • Noise reduction earset using the in-ear microphone and out-ear microphone sound-absorbing characteristics of the present invention for achieving the above object preferably a head comprising a speaker; An in-ear microphone and an out-ear microphone formed in the head; And a noise removing circuit for removing noise and restoring a user's voice by using a difference in sound absorption characteristics of the in-ear microphone and the out-ear microphone.
  • the noise reduction circuit the noise extraction unit for extracting noise by removing the voice to the voice and noise input to the in-ear microphone and the out-ear microphone;
  • a correction unit for calculating and correcting a noise correction value to be applied to each of the in-ear microphones and the out-ear microphones;
  • a voice restoring unit which restores a user's voice by removing the corrected real noise from the in-ear microphone and the out-ear microphone signal, respectively.
  • a parameter compensation unit is formed between the in-ear microphone and the noise extraction unit to widen the low range transmitted through the ear canal and compensate each parameter to convert a signal similar to the external voice.
  • the noise reduction method using the in-ear microphone and the out-ear microphone sound-absorbing characteristics of the present invention preferably, removing the noise by removing the user voice from the in-ear microphone signal and the out-ear microphone signal; Correcting the noise by calculating a noise correction value to be applied to each of the in-ear microphone and the mutual relationship between the out-ear microphone; And restoring a user's voice by removing the corrected real noise from the in-ear microphone and the out-ear microphone signal, respectively.
  • the noise correction value reflects at least one or more of the microphone hardware characteristic data, the data measured at the time of correction, and the value corrected by calculating in the reverse direction of the signal processing of the microphone.
  • the noise correction value to be applied to the in-ear microphone and the out-ear microphone may have a complementary relationship with respect to a reference point.
  • the user's voice may be removed by extending the bandwidth for the low range of the internal voice transmitted through the ear canal, compensating each parameter obtained through the expansion, converting the signal into a signal similar to the external voice, and then converting the converted internal voice and the external voice. Can be achieved through liver offset.
  • the noise canceling earset and the noise canceling method using the in-ear microphone and the out-ear microphone sound-absorbing characteristics according to the present invention, the hardware characteristics and the environment from the internal and external noise input to the microphones provided inside and outside, respectively It is possible to output the user's voice more clearly because the noise is corrected and removed after considering the characteristics.
  • the user's voice can be clearly transmitted to the counterpart regardless of the shape of the earset, the state of wearing the earset, and a very noisy place such as a performance hall.
  • FIG. 1 is a block diagram of a noise canceling earset according to an embodiment of the present invention.
  • FIG. 2 is a control circuit block diagram of a noise canceling circuit according to an exemplary embodiment of the present invention.
  • FIG. 3 is a flowchart of a noise removing method according to an embodiment of the present invention.
  • ⁇ means means a unit that processes at least one function or operation, Each of these may be implemented by software or hardware, or a combination thereof.
  • FIG. 1 is a block diagram of a noise canceling earset according to an embodiment of the present invention.
  • the noise canceling earset of the present invention is installed on each of the first head 1 and the second head 2 and the first head 1 and the second head 2 worn on the user's ear.
  • a speaker unit an in-ear microphone 3 installed in the first head 1, which is one of two heads, and an out-ear microphone 4 installed in the second head 2, which is the other one of the two heads.
  • the in-ear microphone 3 is positioned in the ear canal of the user.
  • the out-ear microphone 4 is located outside the outer ear canal.
  • the in-ear microphone 3 when the in-ear microphone 3 is worn, the closer to the user's ear canal, the more effectively the voice transmitted through the ear can be captured.
  • the user's voice may go out of the mouth but is transmitted through the eardrum to the inside of the ear, so that not only the voice can be captured through the in-ear microphone 3, but also the external noise can be blocked. If you speak with your ears closed, you will hear your voice and cut off external noise.
  • the present invention corrects the actual noise in consideration of hardware characteristics and environmental characteristics from the internal noise and the external noise input to the microphone provided inside and outside, respectively, and removes the corrected actual noise from the signal input to the microphone.
  • the user's voice can be more clearly restored.
  • an in-ear microphone 3 is formed in the first head 1 and an out-ear microphone 4 is formed in the second head 2.
  • the in-ear microphone 3 and the out-ear microphone 4 may be mounted on the same head.
  • the in-ear microphone 3 and the out-ear microphone 4 may be provided in one head.
  • it may be in the form of a wireless (Bluetooth) earset to be attached to one ear, and the in-ear microphone 3 is formed inside, and the outer ear microphone 4 is exposed to the outside. Can be.
  • FIG. 2 is a control circuit block diagram of a noise canceling circuit according to an exemplary embodiment of the present invention.
  • the noise canceling circuit 5 of the present invention the noise extraction unit for extracting the noise by removing the voice with respect to the voice and noise input to the in-ear microphone 3 and the out-ear microphone (4)
  • a parameter compensator may be formed between the in-ear microphone 3 and the noise extractor 51 to widen the low range transmitted through the ear canal, compensate each parameter, and convert it into a signal similar to the external voice.
  • the noise extracting unit 51 extracts the correlation between external noise and internal noise from the correlation between the in-ear microphone signal and the out-ear microphone signal.
  • the voice is removed, and the parameter compensator converts the signal of the in-ear microphone 3 similarly to the signal of the out-ear microphone 4 to remove the voice through mutual calculation.
  • the correcting unit 52 considers the hardware characteristics of the in-ear microphone 3 and the out-ear microphone 4, a signal processing algorithm, and the like, and applies the mutual relationship between the in-ear microphone 3 and the out-ear microphone 4, respectively.
  • the noise correction value to be applied is calculated and the calculated noise correction value is applied to the noise calculated by the correlation between the in-ear microphone 3 and the out-ear microphone 4.
  • the voice reconstruction unit 53 restores the internal voice by removing the actual internal noise from the in-ear microphone signal, and restores the external voice by removing the actual external noise from the out-ear microphone signal. Thereafter, the internal voices and the external voices are synthesized and delivered to the other party.
  • FIG. 3 is a flowchart of a noise removing method according to an embodiment of the present invention.
  • an object input to the in-ear microphone 3 is defined as internal voice and internal noise
  • an object input to the out-ear microphone 4 is defined as external voice and external noise.
  • the in-ear microphone 3 and the out-ear microphone 4 when voice and noise are input to the in-ear microphone 3 and the out-ear microphone 4, as in (Expression 1) and (Equation 2), the in-ear microphone 3 and the out-ear microphone are input. (4) outputs the in-ear microphone signal and the out-ear microphone signal through signal processing, and extracts only a noise component by removing a user's voice from the in-ear microphone signal and the out-ear microphone signal (S1).
  • each parameter is compensated for through low bandwidth and converted into a signal similar to the external voice.
  • the user voice can be removed by canceling the converted internal voice and the external voice.
  • Equation 3 it is possible to extract the correlation between the external noise and the internal noise from the correlation between the in-ear microphone signal and the out-ear microphone signal.
  • Equation 3 extracts noise for MIC OUT -MIC IN , but MIC IN -Noise is also extracted for the MIC OUT .
  • the external noise and the internal noise may have different characteristics because the difference between the frequency band and the signal processing input to the microphone may be different.
  • a noise correction value to be applied to each of the mutual relations between the in-ear microphone 3 and the out-ear microphone 4 is determined. Calculate.
  • the microphone hardware characteristic may include data measured in advance when the product is shipped, and the environmental characteristic may include data measured at calibration.
  • the signal processing algorithm may include a value corrected by calculating in the reverse direction of the signal processing of each microphone.
  • the in-ear microphone 3 is differentially calculated by the out-ear microphone 4, the first correction value obtained through the above expression (4) is substituted, and the out-ear microphone 4 is replaced by the in-ear microphone 3. In the case of difference calculation, the second correction value obtained through the above expression (4) is substituted.
  • the relationship between the first correction value and the second correction value may be in a complementary relationship with respect to the reference point.
  • the external voice and the internal voice of the user may be synthesized or used separately, and the original user voice is transmitted to the other party.
  • the present invention can be implemented in a mobile device that interoperates with a wired or wireless earset of a structure as illustrated in FIG. For example, it can be executed in a smart phone or a tablet computer.
  • the restored user voice can be transmitted through a data communication network or a mobile communication network.
  • the user's voice is transmitted to the other party's phone or mobile terminal through the exchange or Voip server.
  • the call counterpart can hear only the user's voice clearly, no matter how noisy the user is.
  • the user's voice is restored to be close to the original voice without distortion.
  • the present invention is mainly applicable to the wired and wireless earset, Bluetooth earset technology for voice calls.
  • the ear set constituting the in-ear microphone 3 and the out-ear microphone 4 can be implemented with a new method of noise canceling technology differentiated from existing noise canceling algorithms.
  • a new method of noise canceling technology differentiated from existing noise canceling algorithms.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Headphones And Earphones (AREA)

Abstract

L'invention concerne un écouteur à élimination de bruit utilisant des caractéristiques de réception de son en provenance d'un microphone intra-auriculaire et d'un microphone sur l'oreille, ainsi qu'un procédé d'élimination de bruit. Selon la présente invention, l'écouteur à élimination de bruit utilisant des caractéristiques de réception de son en provenance d'un microphone intra-auriculaire et d'un microphone sur l'oreille et le procédé d'élimination de bruit comprennent : l'élimination d'une voix d'utilisateur d'un signal de microphone intra-auriculaire et d'un signal de microphone sur l'oreille de façon à extraire un bruit ; le calcul d'une valeur de correction de bruit à appliquer mutuellement au microphone intra-auriculaire et au microphone sur l'oreille de façon à corriger le bruit ; et l'élimination respective du bruit réel corrigé du signal de microphone intra-auriculaire et du signal de microphone sur l'oreille de façon à restaurer la voix de l'utilisateur. Selon la présente invention, un bruit interne et un bruit externe respectivement entrés dans des microphones situés à l'intérieur et à l'extérieur sont corrigés en un bruit réel en tenant compte de caractéristiques matérielles, de caractéristiques environnementales et analogues, puis éliminés, ce qui permet d'émettre en sortie plus clairement la voix de l'utilisateur. Ainsi, la voix de l'utilisateur peut être clairement transmise à une contrepartie indépendamment de la forme d'un écouteur, d'un état porté à l'écouteur, d'un endroit très bruyant tel qu'une salle de concert et analogue.
PCT/KR2018/001020 2017-02-13 2018-01-23 Écouteur à élimination de bruit utilisant des caractéristiques de réception de son en provenance d'un microphone intra-auriculaire et d'un microphone sur l'oreille et procédé d'élimination de bruit WO2018147573A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2017-0019335 2017-02-13
KR1020170019335A KR101898911B1 (ko) 2017-02-13 2017-02-13 인이어 마이크와 아웃이어 마이크 수음특성을 이용한 소음 제거 이어셋 및 소음 제거 방법

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113163286A (zh) * 2021-03-22 2021-07-23 九音(南京)集成电路技术有限公司 一种通话降噪方法、耳机和计算机存储介质
CN116634332A (zh) * 2023-06-05 2023-08-22 深圳市品声科技有限公司 麦克风降噪处理方法及计算机存储介质

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WO2020045705A1 (fr) * 2018-08-30 2020-03-05 엘지전자 주식회사 Appareil audio portable
KR102570384B1 (ko) 2018-12-27 2023-08-25 삼성전자주식회사 가전기기 및 이의 음성 인식 방법
KR102569365B1 (ko) 2018-12-27 2023-08-22 삼성전자주식회사 가전기기 및 이의 음성 인식 방법
US11887574B2 (en) 2021-02-01 2024-01-30 Samsung Electronics Co., Ltd. Wearable electronic apparatus and method for controlling thereof
KR20240039435A (ko) 2022-09-19 2024-03-26 주식회사 인투스 다중 센서신호 융합 기반의 주변소음 제거를 통한 고품질 음성신호 처리 장치 및 방법

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JP2006166110A (ja) * 2004-12-08 2006-06-22 Alpine Electronics Inc 車載用オーディオ装置
KR20120091454A (ko) * 2002-03-27 2012-08-17 앨리프컴 통신 시스템에서 사용을 위한 마이크로폰과 음성 활동 감지(ｖａｄ) 구성
KR20130054898A (ko) * 2011-11-17 2013-05-27 한양대학교 산학협력단 휴대 단말기를 이용한 음향 수신 장치 및 방법
KR20130101152A (ko) * 2011-08-10 2013-09-12 고어텍 인크 통신 이어폰의 음성보강 방법, 장치 및 노이즈저감 통신 이어폰

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JP2562708B2 (ja) * 1990-03-23 1996-12-11 長野日本無線株式会社 ノイズキャンセル方法及び装置
KR20120091454A (ko) * 2002-03-27 2012-08-17 앨리프컴 통신 시스템에서 사용을 위한 마이크로폰과 음성 활동 감지(ｖａｄ) 구성
JP2006166110A (ja) * 2004-12-08 2006-06-22 Alpine Electronics Inc 車載用オーディオ装置
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KR20130054898A (ko) * 2011-11-17 2013-05-27 한양대학교 산학협력단 휴대 단말기를 이용한 음향 수신 장치 및 방법

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113163286A (zh) * 2021-03-22 2021-07-23 九音(南京)集成电路技术有限公司 一种通话降噪方法、耳机和计算机存储介质
CN116634332A (zh) * 2023-06-05 2023-08-22 深圳市品声科技有限公司 麦克风降噪处理方法及计算机存储介质

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