WO2015184828A1 - Terminal comprenant une pluralité de microphones, procédé de réglage de microphones associé, et procédé d'amélioration de la qualité sonore - Google Patents

Terminal comprenant une pluralité de microphones, procédé de réglage de microphones associé, et procédé d'amélioration de la qualité sonore Download PDF

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Publication number
WO2015184828A1
WO2015184828A1 PCT/CN2015/071492 CN2015071492W WO2015184828A1 WO 2015184828 A1 WO2015184828 A1 WO 2015184828A1 CN 2015071492 W CN2015071492 W CN 2015071492W WO 2015184828 A1 WO2015184828 A1 WO 2015184828A1
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WIPO (PCT)
Prior art keywords
mic
terminal
mics
ultrasonic
end user
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PCT/CN2015/071492
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English (en)
Chinese (zh)
Inventor
王进军
薛华
孙焘
梁超
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中兴通讯股份有限公司
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Publication of WO2015184828A1 publication Critical patent/WO2015184828A1/fr

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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones

Definitions

  • the present invention relates to the field of MIC setting technologies, and in particular, to a multi-MIC terminal, a MIC setting method thereof, and a sound quality upgrading method.
  • Voice call is a basic function of mobile terminals.
  • the improvement of voice call quality is a topic that all mobile terminals are committed to. Due to the uncertainty and complexity of the call environment, environmental noise is an important factor affecting the voice quality of the call. Therefore, the noise reduction performance of the mobile terminal has become a key indicator for the major operators to judge the mobile phone. How to eliminate or reduce the environmental noise has become Chip manufacturers and terminal manufacturers are committed to researching a key topic.
  • the noise reduction algorithm has evolved from the previous single MIC noise reduction to dual MIC noise reduction and even microphone array algorithms.
  • the number of MICs on mobile terminals has also evolved from a single MIC to a now-current dual MIC.
  • Even some mobile terminals have already been 3MIC or 4MIC layouts. These new technologies are driving the development and performance of mobile terminal noise reduction technology. Upgrade.
  • the signal-to-noise ratio of the primary MIC is required to be 6 dB larger than the signal-to-noise ratio of the secondary MIC. Please refer to the typical dual MIC layout mode shown in Figure 1.
  • the MIC1 in the lower part of the fixed setting terminal is the main MIC
  • the MIC2 in the upper part is the sub MIC. Due to the vocal characteristics of the traditional receiver (Receiver), the end user is closer to the mouth than the sub MIC when using the handset mode, so it is easy to meet the noise reduction algorithm requirements.
  • the end user uses the hands-free mode to make a call, when the relative position of the person and the terminal is different, the signal-to-noise ratio of the primary and secondary MICs changes, so that the difference between the signal-to-noise ratio of the primary and secondary MICs cannot satisfy the noise reduction algorithm.
  • the requirement is that the noise reduction algorithm is invalidated, and the noise reduction performance of the call is drastically deteriorated. Therefore, a method is needed to identify such changes, and the noise reduction performance of the voice call is ensured, thereby improving the user experience and increasing the market competitiveness of the product.
  • the main technical problem to be solved by the present invention is to provide a multi-MIC terminal, a MIC setting method thereof, and a sound quality improving method, which solve the problem that the primary and secondary MIC fixed settings of the related multi-MIC terminal cause poor noise reduction performance.
  • a MIC setting method for a multi-MIC terminal comprising:
  • the MIC closest to the end user is set as the primary MIC, and the MIC other than the nearest MIC of the terminal user is set as the secondary MIC.
  • the step of determining a MIC that is closest to the end user in all MICs of the terminal includes:
  • the MIC closest to the end user in all MICs of the terminal is determined by ultrasonic measurements.
  • the step of determining, by using ultrasonic measurement, the MIC of all the MICs of the terminal that is closest to the end user includes:
  • the ultrasonic transmitting module emits measuring ultrasonic waves, and each ultrasonic receiving module receives the measured ultrasonic waves that the transmitted measuring ultrasonic waves meet and are reflected by the end user;
  • each of the ultrasonic receiving modules is integrally disposed on the corresponding MIC.
  • the ultrasonic transmitting module is integrally disposed on a speaker of the terminal.
  • the method further includes:
  • the original MIC setting is maintained or all MICs are set as the main MIC
  • the M MICs are the closest MIC to the end user, select any one of the M MICs as The primary MIC, wherein the M is greater than or equal to 2 and less than the total number N of MICs of the terminal.
  • a sound quality improvement method for a multi-MIC terminal comprising:
  • a noise reduction algorithm is determined according to the primary MIC and the secondary MIC, and the terminal is subjected to noise reduction processing according to the noise reduction algorithm.
  • the method before determining a MIC that is closest to the end user in all MICs of the terminal, the method further includes:
  • Determining whether the terminal has the hands-free mode enabled and if so, performing the step of determining the MIC of all the MICs of the terminal that is closest to the terminal user.
  • a multi-MIC terminal comprising a processor and a plurality of MICs, wherein:
  • the processor is configured to: determine a MIC that is closest to the end user in the plurality of MICs, and set the MIC closest to the end user to a primary MIC, except for the MIC that is closest to the end user of the terminal user.
  • the MIC is set to the sub MIC.
  • the processor is configured to determine a MIC of the plurality of the MICs that is closest to the end user in the following manner:
  • the MIC closest to the end user in all MICs of the terminal is determined by ultrasonic measurements.
  • the terminal further includes an ultrasonic transmitting module and a plurality of ultrasonic receiving modules respectively capable of characterizing positions of the plurality of the MICs;
  • the ultrasonic transmitting module is configured to emit a measuring ultrasonic wave
  • Each of the ultrasonic receiving modules is configured to receive the measuring ultrasonic waves emitted by the ultrasonic transmitting module and the measuring ultrasonic waves reflected by the terminal user;
  • the processor is configured to determine, by ultrasonic measurements, the MICs closest to the end user of all MICs of the terminal as follows:
  • the MIC corresponding to the ultrasonic receiving module that first receives the reflected ultrasonic wave reflected back is determined as the closest MIC to the end user; or
  • Si (ti-t0)*C-S0, wherein the Si is the distance of the i-th ultrasonic receiving module from the end user, the i is greater than or equal to 1, and is less than or equal to the total number N of MICs of the terminal;
  • the ti is a time when the i-th ultrasonic receiving module receives the reflected ultrasonic wave reflected;
  • the t0 is a time when the ultrasonic transmitting module transmits the measuring ultrasonic wave;
  • C is a transmission speed of the measured ultrasonic wave;
  • S0 is the distance of the ultrasonic transmitting module from the end user.
  • each of the ultrasonic receiving modules is integrally disposed on a corresponding MIC.
  • the terminal further includes a speaker, and the ultrasonic transmitting module is integrally disposed on the speaker.
  • the processor is further configured to:
  • the original MIC setting is maintained or all MICs are set as the main MIC
  • the M MICs are the closest MIC to the end user, select any one of the M MICs.
  • the M is greater than or equal to 2 and less than the total number N of MICs of the terminal.
  • the processor is further configured to: set the primary MIC and the secondary MIC of the terminal Then, determining a noise reduction algorithm according to the primary MIC and the secondary MIC, and performing noise reduction processing on the terminal according to the noise reduction algorithm.
  • the multi-MIC terminal provided by the technical solution of the present invention, and the MIC setting method and the sound quality improving method, when setting the MIC of the terminal, set the MIC closest to the terminal user in each MIC as the main MIC, and set the other MIC as the sub-MIC.
  • This setting ensures that the MIC closest to the end user (which is easier to meet the noise reduction algorithm requirements) is always guaranteed in different usage modes (eg earpiece mode and hands-free mode) as the main MIC, ie the main solution of the technical solution of the present invention.
  • the setting of the secondary MIC can be dynamically adjusted according to the change of the relative position of the terminal user and the terminal, so that the noise reduction performance is always maintained in a better state, thereby improving the sound quality of the terminal and the satisfaction of the user experience.
  • FIG. 1 is a schematic diagram of a MIC layout of a related art dual MIC terminal
  • FIG. 2 is a schematic flowchart of a method for setting an MIC of a multi-MIC terminal according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic flowchart of determining an MIC closest to a terminal user by ultrasonic measurement according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic structural diagram of a multi-MIC terminal provided in Embodiment 2 of the present invention.
  • FIG. 5 is a schematic structural diagram of another multi-MIC terminal according to Embodiment 2 of the present invention.
  • FIG. 6 is a schematic structural diagram of a speaker provided in Embodiment 3 of the present invention.
  • FIG. 7 is a schematic flowchart of a method for setting an MIC of a dual MIC terminal according to Embodiment 3 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the multi-MIC terminal in this embodiment refers to a terminal provided with at least two MICs (ie, an electro-acoustic conversion device), and the MIC setting method includes the following steps:
  • Step 201 Determine a MIC that is closest to the terminal user in each MIC of the terminal;
  • Step 202 Set the MIC closest to the terminal user as the primary MIC, and set the other MIC as the secondary MIC.
  • the terminal can trigger execution when the user turns on the hands-free mode; it can also trigger execution according to other conditions (such as real-time or timing).
  • other conditions such as real-time or timing.
  • the embodiment of the invention further discloses a computer program, comprising program instructions, which when executed by the computer, enable the computer to execute the MIC setting method of any of the above multiple MIC terminals.
  • the embodiment of the invention discloses a carrier carrying the computer program.
  • determining the distance between each MIC of the terminal and the end user in this embodiment may be implemented by various measurement methods.
  • the following is an example of determining an MIC of a terminal user in each MIC of the terminal by using an ultrasonic measurement to determine the MIC of the terminal, and the present invention is described in one step.
  • Step 301 Set an ultrasonic transmitting module for the terminal, and set an ultrasonic receiving module for each MIC to represent each MIC position; where the MIC position can be represented by the position of the ultrasonic receiving module to indicate the position of the corresponding MIC; for example;
  • the ultrasonic receiving modules can be integrated on each corresponding MIC to make the positions of the two uniform; of course, the integrated settings can be omitted, for example, a certain distance can be reserved between the two, as long as the distance satisfies the ultrasonic receiving module and the end user.
  • the distance between the MIC of the ultrasonic receiving module and the end user can be characterized;
  • Step 302 The ultrasonic transmitting module emits a measuring ultrasonic wave
  • Step 303 Each ultrasonic receiving module receives the measured ultrasonic wave reflected by the end user;
  • Step 304 Determine the MIC closest to the end user, including: the first measurement will be received.
  • the MIC corresponding to the ultrasonic receiving module of the acoustic wave is determined as the closest MIC to the end user, or the distance of each ultrasonic receiving module from the end user is calculated according to the following calculation formula, and the MIC corresponding to the ultrasonic receiving module with the smallest distance is determined as the distance.
  • the latest MIC of the end user is
  • Si is the distance from the end user of the i-th ultrasonic receiving module, i is greater than or equal to 1, less than or equal to the total number of MICs of the terminal N; ti is the time when the i-th ultrasonic receiving module receives the measuring ultrasonic wave; t0 is the ultrasonic transmitting module transmitting the measuring ultrasonic wave Time; C is the transmission speed of the ultrasonic wave; S0 is the distance of the ultrasonic transmitting module from the end user.
  • the ultrasonic transmitting module can be theoretically disposed at any position on the terminal as long as the measured ultrasonic wave emitted by the ultrasonic wave can satisfy the above requirements.
  • the ultrasonic transmitting module is preferably integrated on the speaker of the terminal (ie, the electro-acoustic conversion setting Sperker).
  • the original MIC setting is maintained or each MIC is set as the main MIC, that is, the single MIC noise reduction mode is entered; when the MIC of the terminal is determined In the case where there are M MICs at the same distance from the end user, and the M MICs are the closest MICs to the end users, one of the M MICs is selected as the primary MIC; M is greater than or equal to 2, less than the total number of MICs of the terminal N .
  • the two MICs are the same distance from the end user, and the two MICs are the closest MIC to the end user, one of the two MICs is selected as the main MIC; the remaining two The MIC acts as a secondary MIC.
  • the embodiment further includes determining a corresponding noise reduction algorithm according to the newly set primary and secondary MICs, and performing noise reduction processing according to the noise reduction algorithm to improve the sound quality of the terminal.
  • the terminal in actual use, is generally the default primary MIC in the handset mode is closest to the end user, so generally no additional MIC reset is required at this time.
  • the terminal user may have a smaller distance from the original set MIC than the distance from the main MIC. Therefore, in this embodiment, the step of determining the MIC closest to the terminal user in each MIC of the terminal and the subsequent MIC setting step can be performed when the terminal turns on the hands-free mode.
  • the embodiment of the invention further discloses a computer program, comprising program instructions, which when executed by the computer, enable the computer to execute the MIC setting method of any of the above multiple MIC terminals.
  • the embodiment of the invention discloses a carrier carrying the computer program.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the embodiment provides a multi-MIC terminal (specifically, a multi-MIC mobile phone, a tablet, etc.), as shown in FIG. 4, including a processor and multiple MICs, where
  • the processor is configured to: determine the closest MIC of the plurality of MICs to the end user, set the nearest MIC of the terminal user to be the primary MIC, and set the other MICs as the secondary MIC.
  • the processor can trigger execution when the user turns on the hands-free mode; it can also trigger execution according to other conditions (such as real-time or timing). It can be ensured that the setting of the primary and secondary MICs of the terminal can be dynamically adjusted according to the change of the relative positions of the terminal user and the terminal, so that the noise reduction performance is always maintained in a better state, thereby improving the sound quality of the terminal and the satisfaction of the user experience. degree.
  • the terminal further includes an ultrasonic transmitting module and an ultrasonic receiving module that can respectively represent the MIC positions.
  • the MIC position can be used to indicate that the position of the ultrasonic receiving module can represent the position of the corresponding MIC; for example, each ultrasonic receiving module can be integrated on each corresponding MIC to make the positions of the two consistent; For example, a certain distance may be reserved between the two, as long as the distance satisfies the distance between the ultrasonic receiving module and the end user, and the distance between the MIC corresponding to the ultrasonic receiving module and the end user can be characterized.
  • the ultrasonic transmitting module is configured to: emit a measuring ultrasonic wave
  • Each ultrasonic receiving module receives the measured ultrasonic wave reflected by the end user
  • the processor is configured to determine the nearest MIC of the plurality of MICs to the end user as follows:
  • the MIC corresponding to the ultrasonic receiving module that first receives the measured ultrasonic wave is determined as the distance end The nearest MIC of the end user, or calculating the distance of each ultrasonic receiving module from the end user according to the following calculation formula, and determining the MIC corresponding to the ultrasonic receiving module with the smallest distance as the closest MIC to the end user:
  • Si is the distance from the end user of the i-th ultrasonic receiving module, i is greater than or equal to 1, less than or equal to the total number of MICs of the terminal N; ti is the time when the i-th ultrasonic receiving module receives the measuring ultrasonic wave; t0 is the ultrasonic transmitting module transmitting the measuring ultrasonic wave Time; C is the transmission speed of the ultrasonic wave; S0 is the distance of the ultrasonic transmitting module from the end user.
  • the ultrasonic transmitting module can be theoretically disposed at any position on the terminal as long as the measured ultrasonic wave emitted by the ultrasonic wave can satisfy the above requirements.
  • the ultrasonic transmitting module is preferably integrated on the speaker of the terminal (ie, the electro-acoustic conversion setting Sperker).
  • the processor determines that the MICs of the terminal are the same distance from the terminal user, the original MIC setting is maintained or each MIC is set as the main MIC, that is, the single MIC noise reduction mode is entered;
  • the MIC when there are M MICs at the same distance from the end user, and the M MICs are the closest MICs to the end users, one of the M MICs is selected as the main MIC; M is greater than or equal to 2, which is less than the total number of MICs of the terminal. N.
  • the two MICs are the same distance from the end user, and the two MICs are the closest MIC to the end user, one of the two MICs is selected as the primary MIC; the remaining two The MIC acts as a secondary MIC.
  • the processor is further configured to: after setting the primary and secondary MICs of the terminal, determine a corresponding noise reduction algorithm according to the new primary and secondary MICs, and perform noise reduction processing according to the noise reduction algorithm to improve the terminal.
  • the sound quality is further configured to: after setting the primary and secondary MICs of the terminal, determine a corresponding noise reduction algorithm according to the new primary and secondary MICs, and perform noise reduction processing according to the noise reduction algorithm to improve the terminal. The sound quality.
  • the terminal In actual use, the terminal is generally the default primary MIC in the handset mode, which is closest to the terminal user. Therefore, it is generally unnecessary to reset the MIC at this time.
  • the terminal user may have a smaller distance from the original set MIC than the distance from the main MIC. Therefore, in this embodiment, when the terminal turns on the hands-free mode, the processor performs determining the MIC intermediate distance of the terminal. The steps of the MIC closest to the end user and the subsequent MIC setup steps.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the present invention will be further exemplified by taking a dual MIC mobile phone as an example. See Figure 1 for the MIC layout of the dual MIC phone.
  • the speaker in FIG. 1 (ie, the electro-acoustic conversion device Speaker) is transformed into a broadband module capable of transmitting both audible and ultrasonic waves for transmitting ultrasonic waves.
  • the modified speaker is shown in Figure 6.
  • the middle is an ultrasonic diaphragm for generating ultrasonic waves.
  • the ultrasonic sensor can also be used to generate ultrasonic waves.
  • the ultrasonic sensor can be integrated on the speaker.
  • the acoustic-electrical conversion devices MIC1 and MIC2 of Fig. 1 are modified into a broadband module that can receive both audible and ultrasonic waves for receiving ultrasonic waves.
  • the measurement information is comprehensively processed, the distance between the MIC1, the MIC2 and the user (ie, the end user) is calculated, and the MIC closer to the user is set as the main MIC and the other MIC. Set to the secondary MIC to ensure noise reduction performance and improve the quality of hands-free calling.
  • the primary and secondary MIC information used in the hands-free call is unchanged, so when the relative position of the person and the mobile phone changes, the signal-to-noise ratio of the primary and secondary MIC may deteriorate, thereby affecting the noise reduction of the mobile phone. Performance and voice quality of the call.
  • the primary and secondary MICs of the mobile phone are dynamically adjusted according to the relative position changes of the mobile phone and the mobile phone, so that the noise reduction performance is maintained in a better state, thereby improving the voice quality of the call and improving the user.
  • the specific adjustment process is as follows.
  • the ultrasonic transmitting module transmits the measuring ultrasonic wave
  • the transmitting time is reported to the mobile phone processor
  • the ultrasonic receiving module on each MIC receives the measuring ultrasonic wave that is fed back by the terminal user, and reports the receiving time to the mobile phone processor, and the mobile phone processor according to the ultrasonic wave
  • the receiving module reports the information to determine the distance between the MIC1 and the MIC2 and the user.
  • the ultrasonic transmitting module (also can be regarded as a speaker) is from the user distance S1, MIC1 distance from the user is S2, MIC2 distance is user distance S3, ultrasonic transmission speed is C, ultrasonic transmission time is t0, MIC1 is received When the ultrasonic time is t1 and MIC2 receives the ultrasonic wave For t2, then:
  • Step 701 Determine whether the mobile phone is turned on, if so, go to step 702; otherwise, go to step 705;
  • Step 702 Obtain a relative position of the MIC1 and the MIC2 of the mobile phone and the terminal user.
  • Step 703 Set the primary and secondary MIC according to the relative position information of the MIC1 and the MIC and the user terminal;
  • Step 704 Update the noise reduction algorithm according to the set primary and secondary MICs, so that the noise reduction algorithm is always in a stable state, ensuring the noise reduction performance of the mobile phone, and making up for the performance of the noise reduction algorithm due to the change of the position of the person. Influence, thus improving the sound quality;
  • Step 705 End.
  • the multi-MIC terminal provided by the technical solution of the present invention, and the MIC setting method and the sound quality improving method, when setting the MIC of the terminal, set the MIC closest to the terminal user in each MIC as the main MIC, and set the other MIC as the sub-MIC.
  • This setting guarantees different usage modes (eg earpiece mode) And the hands-free mode) always guarantees the closest MIC to the end user (the MIC is more likely to meet the requirements of the noise reduction algorithm) as the main MIC, that is, the setting of the primary and secondary MICs of the technical solution of the present invention can be followed by the terminal user and the terminal.
  • the corresponding dynamic adjustment of the relative position changes, so that the noise reduction performance is always maintained in a better state, thereby improving the sound quality of the terminal and the satisfaction of the user experience. Therefore, the present invention has strong industrial applicability.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Quality & Reliability (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Telephone Function (AREA)

Abstract

L'invention concerne un terminal comprenant une pluralité de microphones, un procédé de réglage de microphones associé, et un procédé d'amélioration de la qualité sonore. Lorsque les microphones d'un terminal sont réglés, le microphone le plus proche de l'utilisateur du terminal est défini comme microphone principal et les autres microphones sont définis comme des microphones auxiliaires. Le réglage garantit que, dans différents modes d'utilisation (un mode récepteur et un mode mains libres par exemple), le microphone le plus proche de l'utilisateur du terminal (ledit microphone répondant mieux aux critères d'un algorithme de réduction de bruit) est toujours défini comme microphone principal. Autrement dit, le réglage du microphone principal et des microphones auxiliaires s'ajuste dynamiquement et en conséquence aux changements de position relatifs du terminal d'utilisateur et du terminal. Les performances de réduction de bruit étant ainsi toujours dans un état préféré, la qualité sonore du terminal et la satisfaction de l'expérience utilisateur sont améliorées.
PCT/CN2015/071492 2014-10-20 2015-01-23 Terminal comprenant une pluralité de microphones, procédé de réglage de microphones associé, et procédé d'amélioration de la qualité sonore WO2015184828A1 (fr)

Applications Claiming Priority (2)

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CN201410557502.4 2014-10-20
CN201410557502.4A CN105592198A (zh) 2014-10-20 2014-10-20 多mic终端及其mic设置方法和音质提升方法

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CN106941549A (zh) * 2017-04-28 2017-07-11 苏州科技大学 一种双麦克风降噪的手机通话装置及其处理方法
CN108848264A (zh) * 2018-06-19 2018-11-20 Oppo广东移动通信有限公司 麦克风的控制方法、装置、存储介质及电子设备
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CN106303804A (zh) * 2016-07-28 2017-01-04 维沃移动通信有限公司 一种麦克风的控制方法及移动终端
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CN112449040A (zh) * 2020-11-17 2021-03-05 珠海格力电器股份有限公司 移动终端的麦克风控制方法以及移动终端

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