WO2011153779A1 - Method and terminal for noise suppression using dual-microphone - Google Patents
Method and terminal for noise suppression using dual-microphone Download PDFInfo
- Publication number
- WO2011153779A1 WO2011153779A1 PCT/CN2010/078093 CN2010078093W WO2011153779A1 WO 2011153779 A1 WO2011153779 A1 WO 2011153779A1 CN 2010078093 W CN2010078093 W CN 2010078093W WO 2011153779 A1 WO2011153779 A1 WO 2011153779A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- microphone
- terminal
- noise
- control chip
- main control
- 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.)
- Ceased
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
Definitions
- the present invention relates to the field of communications, and in particular, to a method and a terminal for suppressing noise using a dual microphone.
- the method for suppressing the background noise of the call is mainly: using a special noise suppression chip, the main microphone for calling and the reference microphone for collecting noise are connected to the noise suppression chip, and the voice is suppressed after the noise suppression processing is performed inside the noise suppression chip.
- the signal is transmitted to the terminal main chip.
- the noise suppression chip is expensive, and has many interfaces, and needs to be configured with an I2C interface, a crystal, various RCs, and matching circuits, which will occupy a large amount of space on the motherboard, and take There are many lines, not only the cost rises, but also makes the motherboard layout line a bottleneck, which greatly limits the application of the program on many communication terminals such as mobile phones.
- a primary object of the present invention is to provide a method and a terminal for suppressing noise by using a dual microphone, which can effectively reduce the communication background noise and reduce the wiring space of the motherboard, thereby effectively saving hardware costs.
- the present invention provides a method of suppressing noise using a dual microphone, which includes: Detecting the current call state of the terminal, determining whether the terminal enters the headset call state; when the terminal enters the non-headphone call state, selecting an audio channel for the primary microphone and the reference microphone by means of time division multiplexing; collecting the call voice through the primary microphone and passing the reference microphone Collecting background noise; and using background noise to perform noise suppression processing on noise in the call sound.
- the method further includes: accessing the reference microphone to the main control chip.
- the method further includes: when the terminal enters the headset call state, the headset microphone is connected to the main control chip; the audio channel is selected for the headset microphone; The microphone collects the call sound.
- the manner of performing the noise suppression processing includes: using a corresponding noise suppression processing algorithm according to the type of the microphone.
- the present invention also provides a terminal for suppressing noise by using a dual microphone, comprising a main control chip, a main microphone connected to the main control chip, and a reference microphone, wherein the main control chip includes: a detection module, which is configured as: a detection terminal The current call state determines whether the terminal enters the headset call state; the switch module is configured to: when the terminal enters the non-headphone call state, select an audio channel for the main microphone and the reference microphone by means of time division multiplexing; For: collecting the call sound through the main microphone, and collecting the background noise through the reference microphone; and the noise suppression processing module, which is set to: perform noise suppression on the noise in the call sound by using the background noise when the terminal enters the non-phone headset state deal with.
- a detection module which is configured as: a detection terminal The current call state determines whether the terminal enters the headset call state
- the switch module is configured to: when the terminal enters the non-headphone call state, select an audio channel for the main microphone and the reference microphone by means of time division
- the terminal further includes a selection switch, which is respectively connected to the main control chip and the reference microphone.
- the selection switch is configured to: when the terminal enters the non-headphone conversation state, select an audio channel for the main microphone and the reference microphone by time division multiplexing. Previously, the reference microphone was connected to the main control chip.
- the terminal further includes a headset microphone; the selection switch is further connected to the headset microphone, and the selection switch is further configured to: when the terminal enters the headset call state, the headset microphone is connected to the main control chip; To: Select an audio channel for the headset microphone; the collection module is further configured to: collect the call sound through the headset microphone.
- the manner of performing the noise suppression processing includes: using a corresponding noise suppression processing algorithm according to the type of the microphone.
- the main control chip is provided with a first microphone interface and a second microphone interface; the main microphone is connected to the main control chip through the first microphone interface; the selection switch passes the reference microphone or the earphone microphone through the second The microphone interface is selected to access the main control chip.
- the main control chip is a baseband processor main control chip or an audio processing chip.
- the method for using the dual microphone to suppress noise and the terminal through the terminal's own main control chip and the selection switch connected to the main control chip use the time division multiplexing method to collect the call sound of the main microphone and the call noise of the reference microphone to perform noise. Suppression processing, the device has a simple structure, can effectively suppress the background noise of the call, reduce the wiring space of the motherboard, and save hardware costs.
- FIG. 1 is a schematic flow chart of an embodiment of a method for suppressing noise using dual microphones according to the present invention
- FIG. 2 is a schematic flow chart of another embodiment of a method for suppressing noise using dual microphones according to the present invention
- Schematic diagram of an embodiment of a terminal 4 is a schematic diagram showing the specific structure of the main control chip in the terminal using the dual microphone suppression noise shown in FIG. 3
- FIG. 5 is a schematic diagram showing the circuit connection of the terminal using the dual microphone suppression noise according to the present invention.
- FIG. 1 is a flow chart showing an embodiment of a method for suppressing noise using dual microphones according to the present invention. As shown in FIG.
- a method for suppressing noise by using a dual microphone includes: Step 101: detecting a current call state of the terminal, determining whether the terminal enters a headset call state; the terminal first detecting a current call state, and detecting the manner thereof Specifically, the terminal is inserted into the terminal, and if the headset is inserted into the terminal, the terminal enters the headset call state, and the headset communicates with the headset; if no headset is inserted into the terminal, the terminal indicates that the terminal performs the call through the primary microphone.
- Step 102 When the terminal enters the non-headphone call state, the audio channel is selected by the main microphone and the reference microphone by means of time division multiplexing; wherein the prior art is to collect the audio signals of the main microphone and the reference microphone at the same time, and the present invention applies
- step 102 an audio channel is selected for the primary microphone and the reference microphone by means of time division multiplexing.
- Step 103 collecting a call sound through the main microphone and collecting background noise through the reference microphone;
- Step 104 Perform noise suppression processing on noise in the call sound by using background noise.
- noise suppression is implemented inside the main control chip; however, the prior art generally processes noise inside the noise processing chip; in this step, after the terminal collects the call sound and the background noise, According to existing A processing algorithm for suppressing noise, using background noise to perform noise suppression processing on noise in the call sound.
- the method for performing the noise suppression processing may specifically be: using a corresponding noise suppression processing algorithm according to the type of the microphone.
- the operating environment of the method for using the dual microphone to suppress noise in this embodiment includes: a main control chip disposed in the communication terminal, and a main microphone, a headphone microphone, and a reference microphone disposed on the terminal.
- the main control chip collects the call sound through the main microphone, and the call sound includes voice and noise.
- the main control chip collects the voice of the earphone through the earphone microphone; the main control chip also collects the background noise through the reference microphone.
- the solution of the embodiment is that the main control chip collects the call sound from the main microphone and the background noise of the reference microphone, and uses the background noise to perform noise suppression processing on the noise in the call sound of the main microphone, so as to achieve the purpose of clear call speech.
- the terminal main control chip detects the current call state of the terminal, and determines whether the terminal enters the headset call state.
- the terminal control chip controls the reference microphone and the main control chip, and
- the main microphone and the reference microphone can be controlled by the main control chip to be connected to the shared audio channel inside the main control chip by means of time division multiplexing, and the main control chip collects the call sound through the main microphone and collects the background noise through the reference microphone.
- the noise suppression processing is then performed on the noise in the call sound.
- the terminal master chip detects that the terminal enters the headset call state, it is controlled by the terminal master chip, connects the earphone microphone with the master chip, and simultaneously disconnects the reference microphone from the master chip to ensure the earphone.
- the normal conversation of the microphone is controlled by the terminal control chip of the terminal, and the audio channel is selected by the main microphone and the reference microphone by means of time division multiplexing, and the main microphone of the terminal itself collects the call of the main microphone.
- Noise suppression processing is performed on the background noise of the sound and the reference microphone, which can effectively suppress the background noise of the call, reduce the wiring space of the motherboard, and save hardware costs.
- Step 1020 Connect the reference microphone to the main control chip.
- Step 1011 When the terminal enters the headset call state, the headset microphone is connected to the main control chip; Step 1012, selecting an audio channel for the headset microphone; Step 1013, collecting the call voice through the headset microphone.
- the terminal main control chip detects the current call state of the terminal, and determines whether the terminal enters the headset call state.
- the terminal control chip controls the reference microphone and the main control chip, and
- the main microphone and the reference microphone are controlled by the main control chip to be connected to the shared audio channel inside the main control chip by means of time division multiplexing, and the main control chip collects the call sound of the main microphone and the background noise of the reference microphone, and then performs noise. Suppress processing.
- This embodiment performs noise suppression processing, and the currently existing noise processing algorithm can be used. Depending on the type of microphone, there will be different noise suppression processing algorithms, so the corresponding noise suppression processing algorithm is used according to the type of the microphone.
- the terminal main control chip detects that the terminal enters the headset call state
- the terminal control chip controls the headset microphone to connect with the main control chip, and simultaneously disconnects the reference microphone from the main control chip to ensure the connection. The normal conversation of the headset microphone.
- the terminal's own control chip detects the current call state of the terminal, and determines whether the terminal enters the headset call state.
- the main control chip selects the headset microphone or the reference microphone to access the main control chip according to the current call state of the terminal.
- the control chip collects the speech sound of the main microphone and the background noise of the reference microphone through time division multiplexing to perform noise suppression processing, which can effectively suppress the background noise of the call, reduce the wiring space of the motherboard, and save hardware costs.
- FIG. 3 is a schematic structural view of an embodiment of a terminal for suppressing noise using dual microphones according to the present invention.
- the present invention provides a terminal for suppressing noise by using a dual microphone, which includes a main control chip 301, a main microphone 302, a reference microphone 303, a headphone microphone 304, and a selection switch 305, wherein the main control chip 301 is provided.
- the first microphone interface MIC1 and the second microphone interface MIC2 The main microphone 302 is connected to the main control chip 301 through the first microphone interface MIC1, and the output end of the selection switch 305 is connected to the main control chip 301 through the second microphone interface MIC2.
- the selection switch 305 is provided with two input terminals, one input end and the earphone.
- the microphone 304 is connected and its other input is connected to a reference microphone 303.
- the main control chip 301 can be a baseband processor main control chip or other audio processing chip.
- the main control chip 301 includes: a detecting module 3011, configured to: detect a current call state of the terminal, and determine whether the terminal enters a headset call state; and the switching module 3012 is configured to: when the terminal enters a non-headphone call state Selecting an audio path for the primary microphone 302 and the reference microphone 303 by way of time division multiplexing; and selecting an audio path for the headset microphone 304 when the terminal enters the headset call state; the collection module 3013 is configured to: when the terminal enters the non-earphone In the call state, the call sound is collected by the main microphone 302, and the background noise is collected by the reference microphone 303; and when the terminal enters the headset call state, the call sound is collected by the earphone microphone 304; the noise suppression processing module 3014 is set to : When the terminal enters the non-headphone call state, the background noise is used to perform noise suppression processing on the noise in the call sound.
- the noise suppression processing module 3014 in this embodiment is a software package module in a main control chip, and the original audio signal enters the module and is processed by a software algorithm to output a noise-suppressed audio signal.
- a special noise suppression chip is usually used. Therefore, the cost of the present invention is reduced as compared with the prior art.
- the call voice collected by the collection module 3013 through the main microphone 302 is a non-headphone call voice, that is, a call voice collected when the headset is not in use.
- the background noise collected by the collection module 3013 through the reference microphone 303 is background noise other than normal speech. For example, the sound in the background environment in which the network terminal is located, except for the speaker's voice.
- the selection switch 305 is configured to: when the terminal enters the non-headphone conversation state, the reference microphone 303 is connected to the main control chip 301; and when the terminal enters the headset conversation state, the ear is The machine microphone 304 is connected to the main control chip 301.
- the main microphone 302 is always connected to the main control chip 301 through the first microphone interface.
- the terminal first detects the current call of the terminal through the detecting module 3011 in the main control chip 301. The state determines whether the terminal enters the headset call state.
- the terminal enters the non-headphone call state, that is, when the terminal uses the main microphone 302 to make a call, the main control chip 301 controls the selection switch 305 to select, and the reference microphone 303 is connected to the main control chip.
- the second mic interface of the 301, the switching module 3012 in the main control chip 301 selects the audio channel shared by the main control chip 301 by the main microphone 302 and the reference microphone 303 by means of time division multiplexing, that is, the main control chip 301 is scheduled.
- the frequency of the primary microphone 302 and the reference microphone 303 switch to select an audio channel.
- the collection module 3013 collects the call sound through the main microphone 302, and collects the background noise by referring to the microphone 303.
- the noise suppression processing module 3014 performs noise suppression processing on the noise in the call sound by using the background noise. Noise suppression is applied to the existing noise processing algorithms.
- the noise suppression processing module 3014 processes the noise, the normal call voice in the main control chip 301 is clear without background noise, which improves the call quality.
- the terminal detecting module 3011 detects that the terminal enters the headset call state, for example, when the headset is inserted into the terminal, the master chip 301 controls the selection switch 305 to select, and the reference microphone 303 is disconnected from the second microphone of the master chip 301.
- the switching module 3012 of the main control chip 301 disconnects the connection between the main microphone 302 and the audio path, and connects the earphone microphone 304 to the audio channel.
- the module 3013 collects the call sound through the earphone microphone 304 to ensure a normal call of the earphone.
- the terminal using the dual microphone to suppress noise according to the embodiment, the call sound and the reference microphone of the main microphone 302 are collected in a time division multiplexing manner by the terminal own control chip 301 and the selection switch 305 connected to the main control chip 301.
- 303 background noise for noise suppression processing, simple structure Single can effectively reduce the background noise of the call, reduce the wiring space of the motherboard, and save hardware costs.
- FIG. 5 is a schematic diagram showing the circuit connection of the terminal of the present invention using dual microphones to suppress noise.
- the main control chip 301 is a baseband processor main control chip
- the selection switch 305 is a double-pole double-throw analog switch. Specifically, the two pins of the output end of the selection switch 305 are respectively connected to the positive pole (Mic2p) and the negative pole (Mic2n) of the second microphone interface (MIC2) of the main control chip 301, and the two input ends of the selection switch 305 are respectively connected to the reference microphone.
- a control line (the line shown by the control) and a power line (the Vcc in the figure) are connected between the main control chip 301 and the selection switch 305.
- the baseband processor main control chip 301 controls the state of the selection switch 305, so that the reference microphone 303 is connected to the second microphone interface (MIC2), and
- the switching control of the internal switching switch of the main control chip 301 selects the audio path of the main microphone 302 and the reference microphone 303 by means of time division multiplexing, so that the baseband processor collects the speech sound of the main microphone 302 and the background noise of the reference microphone 303.
- the terminal circuit of the embodiment further includes a microphone matching circuit composed of components R1, R2, Cl, C2, and C3, and R3, C4, C5, and C6, which are not limited herein. description.
- a microphone matching circuit composed of components R1, R2, Cl, C2, and C3, and R3, C4, C5, and C6, which are not limited herein. description.
- R1, R2, Cl, C2, and C3, and R3, C4, C5, and C6, which are not limited herein. description.
- the terminal circuit of the embodiment further includes a microphone matching circuit composed of components R1, R2, Cl, C2, and C3, and R3, C4, C5, and C6, which are not limited herein. description.
- R1, R2, Cl, C2, and C3, and R3, C4, C5, and C6, which are not limited herein. description.
- all or a portion of the steps above may be accomplished by a program to instruct the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk.
- all or part of the steps of the above embodiments
- the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or process changes made by the description of the invention and the drawings may be directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.
- INDUSTRIAL APPLICABILITY The present invention uses a dual microphone to suppress noise and a terminal through a terminal's own main control chip and a selection switch connected to the main control chip, and uses a time division multiplexing method to collect the call sound of the main microphone and the call noise of the reference microphone.
- the device has a simple structure, can effectively suppress the background noise of the call, reduce the wiring space of the motherboard, and save hardware costs.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Telephone Function (AREA)
- Circuit For Audible Band Transducer (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
使用双麦克抑制噪声的方法及终端 Method and terminal for suppressing noise by using dual microphone
技术领域 本发明涉及通讯领域，尤其涉及一种使用双麦克抑制噪声的方法及终端。 TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a method and a terminal for suppressing noise using a dual microphone.
背景技术 随着手机等各种通讯终端日益广泛的被使用， 各种终端的使用环境也各 不相同， 由此产生不同的通话质量。 比如， 人们经常会在公交车或闹市等嘈 杂的环境中使用手机， 在这些环境下进行通话时， 通话对方用户会经常听不 清手机中的语音。 而无论使用何种通讯终端， 人们通常希望在各种使用环境 中均有较高的通话质量， 甚至在闹市或者聚会场所等嘈杂环境中都希望能够 进行稳定可靠且清晰可辨的通话。 因此， 需要提高通讯终端的通话质量， 应 当尽量减少通话双方的噪声，使通话对方可以清楚交谈， 享受通话的全过程。 目前进行通话背景噪声抑制的方法主要是： 使用专门的噪声抑制芯片， 将用于通话的主麦克和釆集噪声的参考麦克接入噪声抑制芯片， 在噪声抑制 芯片内部经过噪声抑制处理后将语音信号传送给终端主芯片。 但是， 釆用上述进行通话背景噪声抑制的方法存在以下缺陷： 噪声抑制芯片价格昂贵， 而且接口众多， 需要配置 I2C接口、 晶体、 各 种阻容以及匹配电路， 这样会占用主板大量空间， 且走线多， 不仅成本上升， 而且使得主板布局走线成为瓶颈， 大大限制了该方案在众多通讯终端如手机 上的应用。 Background Art As various communication terminals such as mobile phones are increasingly used, the environments in which various terminals are used are also different, thereby generating different call quality. For example, people often use mobile phones in a noisy environment such as a bus or a busy city. When making a call in these environments, the other party's users often cannot hear the voice in the phone. Regardless of the type of communication terminal used, it is often desirable to have a high quality of call in a variety of environments, and even in a noisy environment such as a downtown or meeting place, it is desirable to have a stable, reliable and legible call. Therefore, it is necessary to improve the call quality of the communication terminal, and the noise of both parties of the call should be minimized, so that the other party can clearly talk and enjoy the whole process of the call. At present, the method for suppressing the background noise of the call is mainly: using a special noise suppression chip, the main microphone for calling and the reference microphone for collecting noise are connected to the noise suppression chip, and the voice is suppressed after the noise suppression processing is performed inside the noise suppression chip. The signal is transmitted to the terminal main chip. However, the above method for suppressing background noise of the call has the following drawbacks: The noise suppression chip is expensive, and has many interfaces, and needs to be configured with an I2C interface, a crystal, various RCs, and matching circuits, which will occupy a large amount of space on the motherboard, and take There are many lines, not only the cost rises, but also makes the motherboard layout line a bottleneck, which greatly limits the application of the program on many communication terminals such as mobile phones.
发明内容 本发明的主要目的在于提供一种使用双麦克抑制噪声的方法及终端， 可 以在有效抑制通话背景噪声的同时，减少主板布线空间，有效节约硬件成本。 本发明提出一种使用双麦克抑制噪声的方法， 其包括： 检测终端当前通话状态， 判断终端是否进入耳机通话状态； 当终端进入非耳机通话状态时， 通过时分复用的方式为主麦克风和参考 麦克风选择音频通路； 通过主麦克风釆集通话声音以及通过参考麦克风釆集背景噪声； 以及 利用背景噪声对通话声音中的噪声进行噪声抑制处理。 当终端进入非耳机通话状态时， 在通过时分复用的方式为主麦克风和参 考麦克风选择音频通路的步骤之前， 所述方法还包括： 将参考麦克风接入主控芯片。 SUMMARY OF THE INVENTION A primary object of the present invention is to provide a method and a terminal for suppressing noise by using a dual microphone, which can effectively reduce the communication background noise and reduce the wiring space of the motherboard, thereby effectively saving hardware costs. The present invention provides a method of suppressing noise using a dual microphone, which includes: Detecting the current call state of the terminal, determining whether the terminal enters the headset call state; when the terminal enters the non-headphone call state, selecting an audio channel for the primary microphone and the reference microphone by means of time division multiplexing; collecting the call voice through the primary microphone and passing the reference microphone Collecting background noise; and using background noise to perform noise suppression processing on noise in the call sound. Before the terminal enters the non-headphone call state, before the step of selecting an audio path for the primary microphone and the reference microphone by means of time division multiplexing, the method further includes: accessing the reference microphone to the main control chip.
检测终端当前通话状态， 判断终端是否进入耳机通话状态的步骤之后， 所述方法还包括： 当终端进入耳机通话状态时， 将耳机麦克风接入主控芯片； 为耳机麦克风选择音频通路； 以及 通过耳机麦克风釆集通话声音。 进行噪声抑制处理的方式包括： 根据麦克的类型釆用相应的噪声抑制处 理算法。 本发明还提出一种使用双麦克抑制噪声的终端， 包括主控芯片、 均与主 控芯片连接的主麦克风以及参考麦克风， 其中， 所述主控芯片包括： 检测模块， 其设置为： 检测终端当前通话状态， 判断终端是否进入耳机 通话状态； 切换模块， 其设置为： 当终端进入非耳机通话状态时， 通过时分复用的 方式为主麦克风和参考麦克风选择音频通路； 釆集模块， 其设置为： 通过主麦克风釆集通话声音， 以及通过参考麦克 风釆集背景噪声； 以及 噪声抑制处理模块， 其设置为： 当终端进入非耳机通话状态时， 利用背 景噪声对通话声音中的噪声进行噪声抑制处理。 所述终端还包括选择开关， 分别与主控芯片以及参考麦克风连接， 所述 选择开关设置为： 当终端进入非耳机通话状态时， 在通过时分复用的方式为 主麦克风和参考麦克风选择音频通路之前， 将参考麦克风接入主控芯片。 所述终端还包括耳机麦克风； 所述选择开关， 还与耳机麦克风连接， 所述选择开关还设置为： 当终端 进入耳机通话状态时， 将耳机麦克风接入主控芯片； 所述切换模块还设置为： 为耳机麦克风选择音频通路； 所述釆集模块还设置为： 通过耳机麦克风釆集通话声音。 进行噪声抑制处理的方式包括： 根据麦克的类型釆用相应的噪声抑制处 理算法。 所述主控芯片上设有第一麦克接口和第二麦克接口； 所述主麦克风通过所述第一麦克接口与主控芯片连接； 所述选择开关将参考麦克风或耳机麦克风通过所述第二麦克接口选择接 入主控芯片。 所述主控芯片为基带处理器主控芯片或音频处理芯片。 After detecting the current call state of the terminal and determining whether the terminal enters the headset call state, the method further includes: when the terminal enters the headset call state, the headset microphone is connected to the main control chip; the audio channel is selected for the headset microphone; The microphone collects the call sound. The manner of performing the noise suppression processing includes: using a corresponding noise suppression processing algorithm according to the type of the microphone. The present invention also provides a terminal for suppressing noise by using a dual microphone, comprising a main control chip, a main microphone connected to the main control chip, and a reference microphone, wherein the main control chip includes: a detection module, which is configured as: a detection terminal The current call state determines whether the terminal enters the headset call state; the switch module is configured to: when the terminal enters the non-headphone call state, select an audio channel for the main microphone and the reference microphone by means of time division multiplexing; For: collecting the call sound through the main microphone, and collecting the background noise through the reference microphone; and the noise suppression processing module, which is set to: perform noise suppression on the noise in the call sound by using the background noise when the terminal enters the non-phone headset state deal with. The terminal further includes a selection switch, which is respectively connected to the main control chip and the reference microphone. The selection switch is configured to: when the terminal enters the non-headphone conversation state, select an audio channel for the main microphone and the reference microphone by time division multiplexing. Previously, the reference microphone was connected to the main control chip. The terminal further includes a headset microphone; the selection switch is further connected to the headset microphone, and the selection switch is further configured to: when the terminal enters the headset call state, the headset microphone is connected to the main control chip; To: Select an audio channel for the headset microphone; the collection module is further configured to: collect the call sound through the headset microphone. The manner of performing the noise suppression processing includes: using a corresponding noise suppression processing algorithm according to the type of the microphone. The main control chip is provided with a first microphone interface and a second microphone interface; the main microphone is connected to the main control chip through the first microphone interface; the selection switch passes the reference microphone or the earphone microphone through the second The microphone interface is selected to access the main control chip. The main control chip is a baseband processor main control chip or an audio processing chip.
本发明使用双麦克抑制噪声的方法及终端通过终端自身主控芯片及与主 控芯片连接的选择开关， 釆用时分复用的方式釆集主麦克风的通话声音和参 考麦克风的通话噪声来进行噪声抑制处理， 该装置结构简单， 可在有效抑制 通话背景噪声的同时， 减少主板布线空间， 节约硬件成本。 The method for using the dual microphone to suppress noise and the terminal through the terminal's own main control chip and the selection switch connected to the main control chip, use the time division multiplexing method to collect the call sound of the main microphone and the call noise of the reference microphone to perform noise. Suppression processing, the device has a simple structure, can effectively suppress the background noise of the call, reduce the wiring space of the motherboard, and save hardware costs.
附图概述 图 1是本发明使用双麦克抑制噪声的方法一实施例流程示意图； 图 2是本发明使用双麦克抑制噪声的方法另一实施例流程示意图； 图 3是本发明使用双麦克抑制噪声的终端一实施例结构示意图； 图 4是上述图 3所示使用双麦克抑制噪声的终端中主控芯片的具体结构 示意图； 图 5是本发明使用双麦克抑制噪声的终端的电路连接示意图。 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic flow chart of an embodiment of a method for suppressing noise using dual microphones according to the present invention; FIG. 2 is a schematic flow chart of another embodiment of a method for suppressing noise using dual microphones according to the present invention; Schematic diagram of an embodiment of a terminal; 4 is a schematic diagram showing the specific structure of the main control chip in the terminal using the dual microphone suppression noise shown in FIG. 3; FIG. 5 is a schematic diagram showing the circuit connection of the terminal using the dual microphone suppression noise according to the present invention.
本发明的较佳实施方式 为了使本发明的技术方案更加清楚、 明了， 下面将结合附图作进一步详 述： 图 1是本发明使用双麦克抑制噪声的方法一实施例流程示意图。 如图 1所示， 本实施例提供的一种使用双麦克抑制噪声的方法， 包括： 步骤 101 , 检测终端当前通话状态， 判断终端是否进入耳机通话状态； 终端首先检测当前通话状态， 其检测方式具体可为， 检测终端是否有耳 机插入， 如果有耳机插入终端， 则表明终端进入耳机通话状态， 通过耳机麦 克风进行通话；如果没有耳机插入终端，则表明终端通过主麦克风进行通话。 步骤 102 , 当终端进入非耳机通话状态时， 通过时分复用的方式为主麦 克风和参考麦克风选择音频通路； 其中， 现有技术是同时釆集主麦克和参考麦克的音频信号， 而本发明申 请步骤 102中釆用时分复用的方式为主麦克风和参考麦克风选择音频通路。 步骤 103 , 通过主麦克风釆集通话声音以及通过参考麦克风釆集背景噪 声； DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to make the technical solutions of the present invention more clear and clear, the following will be further described in conjunction with the accompanying drawings: FIG. 1 is a flow chart showing an embodiment of a method for suppressing noise using dual microphones according to the present invention. As shown in FIG. 1 , a method for suppressing noise by using a dual microphone according to the embodiment includes: Step 101: detecting a current call state of the terminal, determining whether the terminal enters a headset call state; the terminal first detecting a current call state, and detecting the manner thereof Specifically, the terminal is inserted into the terminal, and if the headset is inserted into the terminal, the terminal enters the headset call state, and the headset communicates with the headset; if no headset is inserted into the terminal, the terminal indicates that the terminal performs the call through the primary microphone. Step 102: When the terminal enters the non-headphone call state, the audio channel is selected by the main microphone and the reference microphone by means of time division multiplexing; wherein the prior art is to collect the audio signals of the main microphone and the reference microphone at the same time, and the present invention applies In step 102, an audio channel is selected for the primary microphone and the reference microphone by means of time division multiplexing. Step 103: collecting a call sound through the main microphone and collecting background noise through the reference microphone;
当检测到终端进入非耳机通话状态时， 则表明终端通过主麦克风进行通 话， 终端分别通过主麦克风和参考麦克风釆集通话声音以及背景噪声， 其中 通话声音为主叫方的正常通话语音， 背景噪声为主叫方说话环境的噪声。 步骤 104, 利用背景噪声对通话声音中的噪声进行噪声抑制处理。 其中， 本实施例中， 是在主控芯片内部实现噪声抑制的； 而现有技术通 常是在噪声处理芯片内部处理噪声的； 本步骤中， 当终端釆集到通话声音以及背景噪声之后， 可以按照已有的 对噪声进行抑制的处理算法， 利用背景噪声对通话声音中的噪声进行噪声抑 制处理。 其进行噪声抑制处理的方式具体可以为： 根据麦克的类型釆用相应 的噪声抑制处理算法。 本实施例使用双麦克抑制噪声的方法的运行环境包括： 设置在通讯终端 内的主控芯片，以及设置在终端上的主麦克风、耳机麦克风以及参考麦克风。 主控芯片通过主麦克风釆集通话声音， 通话声音包括语音以及噪音， 主控芯 片通过耳机麦克风釆集耳机通话声音； 主控芯片还通过参考麦克风釆集背景 噪声。 本实施例的解决方案是通过主控芯片釆集来自主麦克风的通话声音以 及参考麦克风的背景噪声， 利用背景噪声对主麦克风的通话声音中的噪声进 行噪声抑制处理， 以实现通话语音清晰的目的。 本实施例中， 首先终端主控芯片检测终端当前通话状态， 判断终端是否 进入耳机通话状态， 当终端进入非耳机通话状态时， 由终端主控芯片控制， 将参考麦克风与主控芯片连接， 并可以由主控芯片控制将主麦克风和参考麦 克风通过时分复用的方式与主控芯片内部的共用音频通路接通， 由主控芯片 通过主麦克风釆集通话声音以及通过参考麦克风釆集背景噪声， 之后对通话 声音中的噪声进行噪声抑制处理。 需要说明的是， 如果终端主控芯片检测到终端进入耳机通话状态， 则由 终端主控芯片控制， 将耳机麦克风与主控芯片连接， 并同时断开参考麦克风 与主控芯片的连接， 保证耳机麦克风的正常通话。 本实施例所述使用双麦克抑制噪声方法， 由终端自身主控芯片控制， 通 过时分复用的方式为主麦克风和参考麦克风选择音频通路， 并由终端自身的 主控芯片釆集主麦克风的通话声音和参考麦克风的背景噪声进行噪声抑制处 理， 可在有效抑制通话背景噪声的同时， 减少主板布线空间， 节约硬件成本。 When it is detected that the terminal enters the non-headphone call state, it indicates that the terminal performs a call through the main microphone, and the terminal collects the call voice and the background noise through the main microphone and the reference microphone respectively, wherein the call voice is the normal call voice of the calling party, and the background noise The noise of the calling party's speaking environment. Step 104: Perform noise suppression processing on noise in the call sound by using background noise. In this embodiment, noise suppression is implemented inside the main control chip; however, the prior art generally processes noise inside the noise processing chip; in this step, after the terminal collects the call sound and the background noise, According to existing A processing algorithm for suppressing noise, using background noise to perform noise suppression processing on noise in the call sound. The method for performing the noise suppression processing may specifically be: using a corresponding noise suppression processing algorithm according to the type of the microphone. The operating environment of the method for using the dual microphone to suppress noise in this embodiment includes: a main control chip disposed in the communication terminal, and a main microphone, a headphone microphone, and a reference microphone disposed on the terminal. The main control chip collects the call sound through the main microphone, and the call sound includes voice and noise. The main control chip collects the voice of the earphone through the earphone microphone; the main control chip also collects the background noise through the reference microphone. The solution of the embodiment is that the main control chip collects the call sound from the main microphone and the background noise of the reference microphone, and uses the background noise to perform noise suppression processing on the noise in the call sound of the main microphone, so as to achieve the purpose of clear call speech. . In this embodiment, the terminal main control chip detects the current call state of the terminal, and determines whether the terminal enters the headset call state. When the terminal enters the non-headphone call state, the terminal control chip controls the reference microphone and the main control chip, and The main microphone and the reference microphone can be controlled by the main control chip to be connected to the shared audio channel inside the main control chip by means of time division multiplexing, and the main control chip collects the call sound through the main microphone and collects the background noise through the reference microphone. The noise suppression processing is then performed on the noise in the call sound. It should be noted that, if the terminal master chip detects that the terminal enters the headset call state, it is controlled by the terminal master chip, connects the earphone microphone with the master chip, and simultaneously disconnects the reference microphone from the master chip to ensure the earphone. The normal conversation of the microphone. In the embodiment, the method for suppressing noise by using the dual microphone is controlled by the terminal control chip of the terminal, and the audio channel is selected by the main microphone and the reference microphone by means of time division multiplexing, and the main microphone of the terminal itself collects the call of the main microphone. Noise suppression processing is performed on the background noise of the sound and the reference microphone, which can effectively suppress the background noise of the call, reduce the wiring space of the motherboard, and save hardware costs.
图 2是本发明使用双麦克抑制噪声的方法另一实施例流程示意图。 如图 2所示， 本实施例在上述图 1所示的实施例的基础上， 在步骤 102 中通过时分复用的方式为主麦克风和参考麦克风选择音频通路的步骤之前还 包括： 步骤 1020, 将参考麦克风接入主控芯片。 在步骤 101之后还包括： 步骤 1011 , 当终端进入耳机通话状态时， 将耳机麦克风接入主控芯片； 步骤 1012, 为耳机麦克风选择音频通路； 步骤 1013 , 通过耳机麦克风釆集通话声音。 本实施例中， 首先终端主控芯片检测终端当前通话状态， 判断终端是否 进入耳机通话状态， 当终端进入非耳机通话状态时， 由终端主控芯片控制， 将参考麦克风与主控芯片连接， 并由主控芯片控制将主麦克风和参考麦克风 通过时分复用的方式与主控芯片内部的共用音频通路接通， 由主控芯片釆集 主麦克风的通话声音和参考麦克风的背景噪声， 之后进行噪声抑制处理。 本 实施例进行噪声抑制处理， 可釆用当前已有的噪声处理算法。 根据麦克的类 型， 会有不同的噪声抑制处理算法， 因此根据麦克的类型釆用相应的噪声抑 制处理算法。 在本实施例中， 当终端主控芯片检测到终端进入耳机通话状态， 则由终 端主控芯片控制， 将耳机麦克风与主控芯片连接， 并同时断开参考麦克风与 主控芯片的连接， 保证耳机麦克风的正常通话。 2 is a flow chart showing another embodiment of a method for suppressing noise using a dual microphone according to the present invention. As shown in FIG. 2, on the basis of the foregoing embodiment shown in FIG. 1, before the step of selecting an audio path for the primary microphone and the reference microphone by means of time division multiplexing in step 102, the method further includes: Step 1020: Connect the reference microphone to the main control chip. After the step 101, the method further includes: Step 1011: When the terminal enters the headset call state, the headset microphone is connected to the main control chip; Step 1012, selecting an audio channel for the headset microphone; Step 1013, collecting the call voice through the headset microphone. In this embodiment, the terminal main control chip detects the current call state of the terminal, and determines whether the terminal enters the headset call state. When the terminal enters the non-headphone call state, the terminal control chip controls the reference microphone and the main control chip, and The main microphone and the reference microphone are controlled by the main control chip to be connected to the shared audio channel inside the main control chip by means of time division multiplexing, and the main control chip collects the call sound of the main microphone and the background noise of the reference microphone, and then performs noise. Suppress processing. This embodiment performs noise suppression processing, and the currently existing noise processing algorithm can be used. Depending on the type of microphone, there will be different noise suppression processing algorithms, so the corresponding noise suppression processing algorithm is used according to the type of the microphone. In this embodiment, when the terminal main control chip detects that the terminal enters the headset call state, the terminal control chip controls the headset microphone to connect with the main control chip, and simultaneously disconnects the reference microphone from the main control chip to ensure the connection. The normal conversation of the headset microphone.
本发明实施例通过终端自身主控芯片对终端当前通话状态进行检测， 判 断终端是否进入耳机通话状态， 由主控芯片根据终端当前的通话状态选择将 耳机麦克风或参考麦克风接入主控芯片， 主控芯片通过时分复用的方式釆集 主麦克风的通话声音和参考麦克风的背景噪声进行噪声抑制处理， 可在有效 抑制通话背景噪声的同时， 减少主板布线空间， 节约硬件成本。 In the embodiment of the present invention, the terminal's own control chip detects the current call state of the terminal, and determines whether the terminal enters the headset call state. The main control chip selects the headset microphone or the reference microphone to access the main control chip according to the current call state of the terminal. The control chip collects the speech sound of the main microphone and the background noise of the reference microphone through time division multiplexing to perform noise suppression processing, which can effectively suppress the background noise of the call, reduce the wiring space of the motherboard, and save hardware costs.
图 3是本发明使用双麦克抑制噪声的终端一实施例结构示意图。 如图 3所示， 本发明提出一种使用双麦克抑制噪声的终端， 包括主控芯 片 301、主麦克风 302、 参考麦克风 303、耳机麦克风 304以及选择开关 305, 其中， 主控芯片 301上设有第一麦克接口 MIC1 以及第二麦克接口 MIC2, 主麦克风 302通过第一麦克接口 MIC1与主控芯片 301连接， 选择开关 305 输出端通过第二麦克接口 MIC2与主控芯片 301连接， 选择开关 305设有两 个输入端， 其一输入端与耳机麦克风 304连接， 其另一输入端与参考麦克风 303连接。 本实施例中， 主控芯片 301可为基带处理器主控芯片或其它音频处理芯 片。 FIG. 3 is a schematic structural view of an embodiment of a terminal for suppressing noise using dual microphones according to the present invention. As shown in FIG. 3, the present invention provides a terminal for suppressing noise by using a dual microphone, which includes a main control chip 301, a main microphone 302, a reference microphone 303, a headphone microphone 304, and a selection switch 305, wherein the main control chip 301 is provided. The first microphone interface MIC1 and the second microphone interface MIC2, The main microphone 302 is connected to the main control chip 301 through the first microphone interface MIC1, and the output end of the selection switch 305 is connected to the main control chip 301 through the second microphone interface MIC2. The selection switch 305 is provided with two input terminals, one input end and the earphone. The microphone 304 is connected and its other input is connected to a reference microphone 303. In this embodiment, the main control chip 301 can be a baseband processor main control chip or other audio processing chip.
如图 4所示， 主控芯片 301包括： 检测模块 3011 , 其设置为： 检测终端当前通话状态， 判断终端是否进入 耳机通话状态； 切换模块 3012, 其设置为： 当终端进入非耳机通话状态时， 通过时分复 用的方式为主麦克风 302和参考麦克风 303选择音频通路； 以及当终端进入 耳机通话状态时， 为耳机麦克风 304选择音频通路； 釆集模块 3013 , 其设置为： 当终端进入非耳机通话状态时， 通过主麦克 风 302釆集通话声音， 并通过参考麦克风 303釆集背景噪声； 以及当终端进 入耳机通话状态时， 通过耳机麦克风 304釆集通话声音； 噪声抑制处理模块 3014, 其设置为： 当终端进入非耳机通话状态时， 利 用背景噪声对通话声音中的噪声进行噪声抑制处理。 其中，本实施例中的噪声抑制处理模块 3014是一个主控芯片中的一个软 件封装模块， 原始的音频信号进入该模块经过软件算法处理， 输出得到经过 噪声抑制后的音频信号。 而现有技术中通常釆用专门的噪声抑制芯片。 因此， 与现有技术相比， 本发明成本降低了。 本实施例中，釆集模块 3013通过主麦克风 302釆集的通话声音为非耳机 通话声音， 即在没有釆用耳机通话时釆集的通话声音。釆集模块 3013通过参 考麦克风 303釆集的背景噪声为正常话音之外的背景噪声。 比如网络终端所 处的背景环境中除说话人声音之外的声音。 本实施例中， 选择开关 305设置为： 当终端进入非耳机通话状态时， 将 参考麦克风 303接入主控芯片 301 ; 以及当终端进入耳机通话状态时， 将耳 机麦克风 304接入主控芯片 301。 As shown in FIG. 4, the main control chip 301 includes: a detecting module 3011, configured to: detect a current call state of the terminal, and determine whether the terminal enters a headset call state; and the switching module 3012 is configured to: when the terminal enters a non-headphone call state Selecting an audio path for the primary microphone 302 and the reference microphone 303 by way of time division multiplexing; and selecting an audio path for the headset microphone 304 when the terminal enters the headset call state; the collection module 3013 is configured to: when the terminal enters the non-earphone In the call state, the call sound is collected by the main microphone 302, and the background noise is collected by the reference microphone 303; and when the terminal enters the headset call state, the call sound is collected by the earphone microphone 304; the noise suppression processing module 3014 is set to : When the terminal enters the non-headphone call state, the background noise is used to perform noise suppression processing on the noise in the call sound. The noise suppression processing module 3014 in this embodiment is a software package module in a main control chip, and the original audio signal enters the module and is processed by a software algorithm to output a noise-suppressed audio signal. In the prior art, a special noise suppression chip is usually used. Therefore, the cost of the present invention is reduced as compared with the prior art. In this embodiment, the call voice collected by the collection module 3013 through the main microphone 302 is a non-headphone call voice, that is, a call voice collected when the headset is not in use. The background noise collected by the collection module 3013 through the reference microphone 303 is background noise other than normal speech. For example, the sound in the background environment in which the network terminal is located, except for the speaker's voice. In this embodiment, the selection switch 305 is configured to: when the terminal enters the non-headphone conversation state, the reference microphone 303 is connected to the main control chip 301; and when the terminal enters the headset conversation state, the ear is The machine microphone 304 is connected to the main control chip 301.
本实施例中， 主麦克风 302通过第一麦克接口与主控芯片 301始终保持 连接， 在对终端通话中的噪声进行抑制时， 首先， 终端通过主控芯片 301中 的检测模块 3011检测终端当前通话状态， 判断终端是否进入耳机通话状态， 当终端进入非耳机通话状态时， 即终端釆用主麦克风 302进行通话时， 主控 芯片 301控制选择开关 305进行选择， 将参考麦克风 303接入主控芯片 301 的第二麦克接口，主控芯片 301中的切换模块 3012通过时分复用的方式为主 麦克风 302和参考麦克风 303选择主控芯片 301中两者共用的音频通路， 即 主控芯片 301按照预定的频率为主麦克风 302和参考麦克风 303切换选择音 频通路。 接着，釆集模块 3013通过主麦克风 302釆集通话声音，并通过参考麦克 风 303釆集背景噪声， 然后， 由噪声抑制处理模块 3014, 利用背景噪声对通 话声音中的噪声进行噪声抑制处理。 对噪声进行抑制处理， 可釆用当前已有 的噪声处理算法。 根据麦克的类型， 会有不同的噪声抑制处理算法， 因此根 据麦克的类型釆用相应的噪声抑制处理算法。 经过噪声抑制处理模块 3014 对噪声进行处理后， 使得主控芯片 301内的正常通话语音清晰而没有背景噪 声的干扰， 提高了通话质量。 In this embodiment, the main microphone 302 is always connected to the main control chip 301 through the first microphone interface. When the noise in the terminal is suppressed, the terminal first detects the current call of the terminal through the detecting module 3011 in the main control chip 301. The state determines whether the terminal enters the headset call state. When the terminal enters the non-headphone call state, that is, when the terminal uses the main microphone 302 to make a call, the main control chip 301 controls the selection switch 305 to select, and the reference microphone 303 is connected to the main control chip. The second mic interface of the 301, the switching module 3012 in the main control chip 301 selects the audio channel shared by the main control chip 301 by the main microphone 302 and the reference microphone 303 by means of time division multiplexing, that is, the main control chip 301 is scheduled. The frequency of the primary microphone 302 and the reference microphone 303 switch to select an audio channel. Next, the collection module 3013 collects the call sound through the main microphone 302, and collects the background noise by referring to the microphone 303. Then, the noise suppression processing module 3014 performs noise suppression processing on the noise in the call sound by using the background noise. Noise suppression is applied to the existing noise processing algorithms. Depending on the type of microphone, there are different noise suppression processing algorithms, so the corresponding noise suppression processing algorithm is used according to the type of the microphone. After the noise suppression processing module 3014 processes the noise, the normal call voice in the main control chip 301 is clear without background noise, which improves the call quality.
当终端检测模块 3011检测到终端进入耳机通话状态时， 比如，检测到有 耳机插入终端， 则主控芯片 301控制选择开关 305进行选择， 将参考麦克风 303与主控芯片 301的第二麦克接口断开， 而将耳机麦克风 304接入主控芯 片 301 的第二麦克接口， 主控芯片 301 的切换模块 3012断开主麦克风 302 与音频通路的连接， 而将耳机麦克风 304接入音频通路，釆集模块 3013通过 耳机麦克风 304釆集通话声音， 保证了耳机的正常通话。 When the terminal detecting module 3011 detects that the terminal enters the headset call state, for example, when the headset is inserted into the terminal, the master chip 301 controls the selection switch 305 to select, and the reference microphone 303 is disconnected from the second microphone of the master chip 301. When the headset microphone 304 is connected to the second microphone interface of the main control chip 301, the switching module 3012 of the main control chip 301 disconnects the connection between the main microphone 302 and the audio path, and connects the earphone microphone 304 to the audio channel. The module 3013 collects the call sound through the earphone microphone 304 to ensure a normal call of the earphone.
本实施例所述的使用双麦克抑制噪声的终端， 通过终端自身主控芯片 301及与主控芯片 301连接的选择开关 305 ,通过时分复用的方式釆集主麦克 风 302的通话声音和参考麦克风 303的背景噪声进行噪声抑制处理， 结构简 单， 可在有效抑制通话背景噪声的同时， 减少主板布线空间， 节约硬件成本。 The terminal using the dual microphone to suppress noise according to the embodiment, the call sound and the reference microphone of the main microphone 302 are collected in a time division multiplexing manner by the terminal own control chip 301 and the selection switch 305 connected to the main control chip 301. 303 background noise for noise suppression processing, simple structure Single, can effectively reduce the background noise of the call, reduce the wiring space of the motherboard, and save hardware costs.
图 5是本发明使用双麦克抑制噪声的终端的电路连接示意图。 如图 5所示， 主控芯片 301为基带处理器主控芯片， 选择开关 305为双 刀双掷模拟开关。 具体的， 选择开关 305的输出端的两引脚分别连接在主控 芯片 301的第二麦克风接口 （MIC2 ) 的正极（Mic2p )和负极（Mic2n )上， 选择开关 305的两输入端分别连接参考麦克风 303和耳机麦克风 304; 另外， 为实现主控芯片 301对选择开关 305的控制， 主控芯片 301与选 择开关 305之间连接有控制线（图中 control所示线路）和电源线（图中 Vcc 所示线路） ； 本实施例中， 当使用主麦克风 302进行通话时， 基带处理器主 控芯片 301控制选择开关 305的状态， 使参考麦克风 303与第二麦克风接口 ( MIC2 )连接， 并通过对主控芯片 301内部切换开关的切换控制， 釆用时分 复用的方式为主麦克风 302和参考麦克风 303选择音频通路， 使基带处理器 釆集到主麦克风 302的通话声音以及参考麦克风 303的背景噪声， 以进行主 麦克风 302通话状态下的噪声抑制。 另外， 为保证各麦克风正常进行声电转换， 本实施例的终端电路中还包 括由元件 Rl、 R2、 Cl、 C2和 C3以及 R3、 C4、 C5和 C6组成的麦克匹配电 路， 在此不作限制描述。 本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成， 所述程序可以存储于计算机可读存储介质中， 如只读 存储器、 磁盘或光盘等。 可选地， 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地， 上述实施例中的各模块 /单元可以釆用 硬件的形式实现， 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。 Figure 5 is a schematic diagram showing the circuit connection of the terminal of the present invention using dual microphones to suppress noise. As shown in FIG. 5, the main control chip 301 is a baseband processor main control chip, and the selection switch 305 is a double-pole double-throw analog switch. Specifically, the two pins of the output end of the selection switch 305 are respectively connected to the positive pole (Mic2p) and the negative pole (Mic2n) of the second microphone interface (MIC2) of the main control chip 301, and the two input ends of the selection switch 305 are respectively connected to the reference microphone. 303 and the earphone microphone 304; In addition, in order to realize the control of the selection switch 305 by the main control chip 301, a control line (the line shown by the control) and a power line (the Vcc in the figure) are connected between the main control chip 301 and the selection switch 305. In the embodiment, when the main microphone 302 is used for the call, the baseband processor main control chip 301 controls the state of the selection switch 305, so that the reference microphone 303 is connected to the second microphone interface (MIC2), and The switching control of the internal switching switch of the main control chip 301 selects the audio path of the main microphone 302 and the reference microphone 303 by means of time division multiplexing, so that the baseband processor collects the speech sound of the main microphone 302 and the background noise of the reference microphone 303. To perform noise suppression in the talking state of the main microphone 302. In addition, in order to ensure that the microphones perform acoustic-electrical conversion normally, the terminal circuit of the embodiment further includes a microphone matching circuit composed of components R1, R2, Cl, C2, and C3, and R3, C4, C5, and C6, which are not limited herein. description. One of ordinary skill in the art will appreciate that all or a portion of the steps above may be accomplished by a program to instruct the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.
以上所述仅为本发明的优选实施例， 并非因此限制本发明的专利范围， 凡是利用本发明说明书及附图内容所作的等效结构或流程变换， 或直接或间 接运用在其他相关的技术领域， 均同理包括在本发明的专利保护范围内。 工业实用性 本发明使用双麦克抑制噪声的方法及终端通过终端自身主控芯片及与主 控芯片连接的选择开关， 釆用时分复用的方式釆集主麦克风的通话声音和参 考麦克风的通话噪声来进行噪声抑制处理， 该装置结构简单， 可在有效抑制 通话背景噪声的同时， 减少主板布线空间， 节约硬件成本。 The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or process changes made by the description of the invention and the drawings may be directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention. INDUSTRIAL APPLICABILITY The present invention uses a dual microphone to suppress noise and a terminal through a terminal's own main control chip and a selection switch connected to the main control chip, and uses a time division multiplexing method to collect the call sound of the main microphone and the call noise of the reference microphone. For noise suppression processing, the device has a simple structure, can effectively suppress the background noise of the call, reduce the wiring space of the motherboard, and save hardware costs.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010196193A CN101873363A (en) | 2010-06-09 | 2010-06-09 | Method and Terminal for Suppressing Noise Using Dual Microphones |
| CN201010196193.4 | 2010-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011153779A1 true WO2011153779A1 (en) | 2011-12-15 |
Family
ID=42998021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2010/078093 Ceased WO2011153779A1 (en) | 2010-06-09 | 2010-10-25 | Method and terminal for noise suppression using dual-microphone |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101873363A (en) |
| WO (1) | WO2011153779A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2792224C1 (en) * | 2022-11-28 | 2023-03-21 | Федеральное государственное бюджетное учреждение "16 Центральный научно-исследовательский испытательный ордена Красной Звезды институт имени маршала войск связи А.И. Белова" Министерства обороны Российской Федерации | Field noise-resistant telephone |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102456341A (en) * | 2010-10-28 | 2012-05-16 | 美商富迪科技股份有限公司 | Microphone device and sound processing method |
| DE102011104268A1 (en) | 2011-06-15 | 2012-12-20 | Austriamicrosystems Ag | Headphone, audio device, audio system and signal transmission method |
| CN102368793B (en) | 2011-10-12 | 2014-03-19 | 惠州Tcl移动通信有限公司 | Cell phone and conversation signal processing method thereof |
| CN104394490A (en) * | 2014-10-30 | 2015-03-04 | 中名(东莞)电子有限公司 | In-Ear Headphones with Noise Cancellation |
| CN105100470A (en) * | 2015-07-22 | 2015-11-25 | 惠州Tcl移动通信有限公司 | Method and system for switching microphone function of mobile terminal |
| CN107507622A (en) * | 2017-08-07 | 2017-12-22 | 维沃移动通信有限公司 | Processing method, mobile terminal and the computer-readable recording medium of voice signal |
| CN109087658A (en) * | 2018-07-16 | 2018-12-25 | 安徽国通亿创科技股份有限公司 | A kind of online interaction live streaming noise processed system |
| CN114171040A (en) * | 2021-10-27 | 2022-03-11 | 歌尔科技有限公司 | Audio noise reduction method and audio monitoring device |
| CN114007157B (en) * | 2021-10-28 | 2025-04-01 | 中北大学 | Intelligent noise reduction communication headset |
| CN113992223B (en) * | 2021-10-29 | 2022-11-25 | 江西扬声电子有限公司 | Built-in conversation system based on microphone array noise reduction |
| CN117692842B (en) * | 2024-01-31 | 2024-10-29 | 大象声科（深圳）科技有限公司 | Device and method for enhancing noise reduction effect of earphone conversation in robust manner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070053528A1 (en) * | 2005-09-07 | 2007-03-08 | Samsung Electronics Co., Ltd. | Method and apparatus for automatic volume control in an audio player of a mobile communication terminal |
| CN101123629A (en) * | 2006-08-08 | 2008-02-13 | 英华达(上海)电子有限公司 | An environmental noise filtering method and device for mobile phone |
| CN101420491A (en) * | 2008-11-24 | 2009-04-29 | 深圳华为通信技术有限公司 | Method, apparatus and controller for ear microphone denoising |
| US20100054516A1 (en) * | 2008-08-29 | 2010-03-04 | Chan Wayne Gp | Apparatus for Reducing Background and Wind Noise to a Microphone |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5673325A (en) * | 1992-10-29 | 1997-09-30 | Andrea Electronics Corporation | Noise cancellation apparatus |
| US6266410B1 (en) * | 1997-06-27 | 2001-07-24 | Kabushiki Kaisha Toshiba | Speakerphone and microphone case for the same |
| US7299076B2 (en) * | 2005-02-09 | 2007-11-20 | Bose Corporation | Vehicle communicating |
-
2010
- 2010-06-09 CN CN201010196193A patent/CN101873363A/en active Pending
- 2010-10-25 WO PCT/CN2010/078093 patent/WO2011153779A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070053528A1 (en) * | 2005-09-07 | 2007-03-08 | Samsung Electronics Co., Ltd. | Method and apparatus for automatic volume control in an audio player of a mobile communication terminal |
| CN101123629A (en) * | 2006-08-08 | 2008-02-13 | 英华达(上海)电子有限公司 | An environmental noise filtering method and device for mobile phone |
| US20100054516A1 (en) * | 2008-08-29 | 2010-03-04 | Chan Wayne Gp | Apparatus for Reducing Background and Wind Noise to a Microphone |
| CN101420491A (en) * | 2008-11-24 | 2009-04-29 | 深圳华为通信技术有限公司 | Method, apparatus and controller for ear microphone denoising |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2792224C1 (en) * | 2022-11-28 | 2023-03-21 | Федеральное государственное бюджетное учреждение "16 Центральный научно-исследовательский испытательный ордена Красной Звезды институт имени маршала войск связи А.И. Белова" Министерства обороны Российской Федерации | Field noise-resistant telephone |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101873363A (en) | 2010-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2011153779A1 (en) | Method and terminal for noise suppression using dual-microphone | |
| US10269369B2 (en) | System and method of noise reduction for a mobile device | |
| US10218853B2 (en) | Wireless conference call telephone | |
| CN104521247B (en) | Hearing aid and noise resisting method and device for Bluetooth headset | |
| US8363823B1 (en) | Two microphone uplink communication and stereo audio playback on three wire headset assembly | |
| EP2798856B1 (en) | Ultra-compact headset | |
| US20100062713A1 (en) | Headset distributed processing | |
| WO2014044064A1 (en) | Method for controlling dual-microphone noise cancellation of mobile phone automatically and mobile phone | |
| CN107864441A (en) | A kind of Bluetooth chip with hearing-aid function, bluetooth earphone and radio hearing aid system | |
| WO2013127302A1 (en) | Method and terminal for preventing voice crosstalk between external loudspeaker and microphone | |
| US20220286538A1 (en) | Earphone device and communication method | |
| WO2015154282A1 (en) | Call device and switching method and device applied thereto | |
| KR20030068821A (en) | A portable telephone, control method, and recording medium therefor | |
| WO2011079570A1 (en) | Terminal noise suppression device, method and communication terminal | |
| US20250133364A1 (en) | Automatic Acoustic Handoff | |
| US8478359B2 (en) | User interface tone echo cancellation | |
| CN114125616A (en) | Low power consumption method and device of wireless earphone, wireless earphone and readable storage medium | |
| EP2636212B1 (en) | Controlling audio signals | |
| US20190132895A1 (en) | Multi-connection device and multi-connection method | |
| JPH09233198A (en) | Method and device for software basis bridge for full duplex voice conference telephone system | |
| JP3160093U (en) | Headphone system | |
| WO2024183765A1 (en) | Foldable electronic device and sound leakage cancellation method | |
| CN210444310U (en) | Telephone system and noise elimination module of telephone | |
| CN103856625B (en) | Control device and the wireless communication terminal of doubleway output audio frequency | |
| US12512109B2 (en) | Headset system for training, headset adapter and operation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10852770 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 10852770 Country of ref document: EP Kind code of ref document: A1 |