WO2011079570A1 - 终端噪声抑制装置、方法及通讯终端 - Google Patents

终端噪声抑制装置、方法及通讯终端 Download PDF

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Publication number
WO2011079570A1
WO2011079570A1 PCT/CN2010/073566 CN2010073566W WO2011079570A1 WO 2011079570 A1 WO2011079570 A1 WO 2011079570A1 CN 2010073566 W CN2010073566 W CN 2010073566W WO 2011079570 A1 WO2011079570 A1 WO 2011079570A1
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WIPO (PCT)
Prior art keywords
microphone
terminal
analog switch
control chip
main control
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PCT/CN2010/073566
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English (en)
French (fr)
Inventor
刘斌
丁志辉
佘海波
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2011079570A1 publication Critical patent/WO2011079570A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

Definitions

  • the present invention relates to a communication hub or, in particular, to a terminal noise suppression apparatus, method, and communication terminal.
  • BACKGROUND OF THE INVENTION With the increasing use of various communication terminals such as mobile phones, various terminal usage environments are also different. For example, people often use mobile phones in noisy environments such as buses and downtown areas. In these environments, the caller of the other party often cannot hear the voice in the phone. Since people pay more attention to the quality of communication of various communication terminals in various environments, even in a noisy environment such as a downtown or a meeting place, it is desirable to be able to make stable, reliable and clearly identifiable calls, so it is necessary to minimize the noise of both parties.
  • the method for suppressing the background noise of the call is mainly: using a special noise suppression chip, connecting the main microphone for calling and the reference microphone for collecting noise to the noise suppression chip, and transmitting the voice signal after the noise suppression processing inside the chip.
  • the noise suppression chip is expensive, has many interfaces, requires I2C, crystal, various resistance and matching circuits, and takes up a large space of the main board, and has many wires, which not only increases the cost, but also takes up a lot of space of the main board, making the layout line a bottleneck. , greatly limited the application of the program on many communication terminals such as mobile phones.
  • One object of the present invention is to provide a terminal noise suppression apparatus and method, which can effectively reduce the communication background noise, reduce the wiring space of the motherboard, and effectively save hardware costs.
  • Another object of the present invention is to provide a communication terminal including the above device.
  • the present invention provides a terminal noise suppression apparatus, including a main control chip of a terminal, a first analog switch, a main microphone for collecting non-headphone talk voices, and a reference for collecting call noise of the terminal.
  • a microphone an output end of the first analog switch is connected to a first microphone interface of the main control chip of the terminal, and the main microphone and the reference microphone are respectively connected to two inputs of the first analog switch
  • the main control chip of the terminal is configured to control the first analog switch to connect the main microphone and the reference microphone to the main control chip by means of time division multiplexing, and collect the main microphone
  • the call sound and the call noise of the reference microphone are subjected to noise suppression processing.
  • the device further includes a second analog switch and an earphone microphone for collecting the voice of the earphone, wherein the output of the second analog switch is connected to the second microphone interface of the master chip of the terminal, The earphone microphone and the reference microphone are respectively connected to the two input ends of the second analog switch; the main control chip of the terminal is further configured to control the first when the earphone microphone is connected to the second analog switch The two analog switches connect the earphone microphone and the reference microphone to the main control chip in a time division multiplexing manner, and collect noise of the call sound of the earphone microphone and the call noise of the reference microphone. .
  • the apparatus further includes a mic matching circuit for ensuring acoustic to electrical conversion of the microphone.
  • the main control chip of the terminal is a baseband processor main control chip.
  • the first analog switch and the second analog switch are double pole double throw analog switches or single pole single throw analog switches.
  • a communication terminal provided by the present invention includes the aforementioned terminal noise suppression device.
  • a terminal noise suppression method provided by the present invention includes: a method in which a main control chip of a terminal controls a first analog switch connected thereto to pass a time division and a multiplexing of a main microphone and a reference microphone connected to the first analog switch The master chip is turned on; the master chip of the terminal collects the call sound of the master microphone and the call noise of the reference microphone to perform noise suppression processing.
  • the method further includes: detecting, by the master chip of the terminal, whether the terminal enters a headset microphone call state; if yes, the master control chip of the terminal controls the second analog switch to connect the second analog switch
  • the earphone microphone and the reference microphone are connected to the main control chip by means of time division multiplexing Passing; the main control chip of the terminal collects the call sound of the earphone microphone and the call noise of the reference microphone to perform noise suppression processing; otherwise, the master control chip of the terminal controls the first analog switch connected thereto
  • the main microphone and the reference microphone connected to the first analog switch are connected to the main control chip by means of time division multiplexing.
  • the main control chip of the terminal is a baseband processor main control chip.
  • the first analog switch and the second analog switch are double pole double throw analog switches or single pole single throw analog switches.
  • the terminal noise suppression device, method and communication terminal of the invention collect the call sound of the main microphone and the reference microphone by time-division multiplexing through the terminal main control chip and the first analog switch connected on the main control chip.
  • the noise is subjected to noise suppression processing, and the formed noise processing device has a simple structure, which can effectively suppress the background noise of the call, reduce the wiring space of the main board, and effectively save the hardware cost.
  • FIG. 1 is a schematic structural view of a terminal noise suppression device according to a first embodiment of the present invention
  • FIG. 2 is a schematic structural view of a terminal noise suppression device according to a second embodiment of the present invention
  • FIG. 3 is a terminal noise suppression device according to a third embodiment of the present invention
  • 4 is a schematic flow chart of a terminal noise suppression method according to a fourth embodiment of the present invention.
  • the present invention provides a terminal noise suppression apparatus, method, and communication terminal.
  • the call sound of the main microphone is collected by time division multiplexing by using the terminal's own control chip and the first analog switch connected to the main control chip.
  • the noise suppression processing is performed by referring to the microphone's call noise, and the formed noise processing device has a simple structure, which can effectively suppress the background noise of the call, reduce the wiring space of the main board, and effectively save the hardware cost.
  • the present invention performs noise suppression processing on the call sound of the earphone microphone and the call noise of the reference microphone through time division multiplexing by using the second analog switch connected to the main control chip and the main control chip, and realizes the noise suppression process through the earphone microphone.
  • Background noise suppression during a call. 1 is a schematic structural diagram of a terminal noise suppression apparatus according to a first embodiment of the present invention. Referring to FIG.
  • the present invention provides a terminal noise suppression apparatus according to a first embodiment, comprising: a main control chip 101 (a main control chip of the terminal;) The first analog switch 102, the main microphone 104, and the reference microphone 105; the output end of the first analog switch 102 is connected to the first microphone interface (MIC1) of the main control chip 101 of the terminal, and the main microphone 104 and the reference microphone 105 are respectively connected.
  • the main microphone 104 is used to collect the non-headphone call sound, that is, to collect the call sound when the headset is not in use.
  • the reference microphone 105 is used to collect the call noise of the terminal, that is, the background noise other than the voice.
  • the main control chip 101 is configured to control the first analog switch to connect the main microphone and the reference microphone to the main control chip by means of time division multiplexing, and perform noise suppression processing on the call sound of the main microphone and the call noise of the reference microphone.
  • the mic is divided into an omnidirectional mic and a unidirectional mic, and depending on the type of mic, there are different noise suppression processing algorithms.
  • the main microphone collects speech and noise
  • the reference microphone only collects noise
  • the subtraction operation between the two in the main chip can perform noise suppression.
  • the main control chip 101 can be a baseband processor main control chip or other audio processing chip.
  • the first analog switch 102 can be a double pole double throw analog switch or a single pole single throw analog switch, or other analog switches, such as a multi-channel analog switch.
  • a voice signal is transmitted to a main control chip after noise suppression processing inside the chip.
  • the terminal noise suppression device of this embodiment is connected to the main control chip and the main control chip of the terminal itself.
  • the first analog switch is connected to the call noise of the main microphone and the call noise of the reference microphone by time division multiplexing to perform noise suppression processing, and the structure is simple, which can effectively suppress the background noise of the call and reduce the wiring space of the main board. Effectively save hardware costs.
  • FIG. 2 is a schematic structural diagram of a terminal noise suppression apparatus according to a second embodiment of the present invention.
  • a terminal noise suppression apparatus comprising: a main control chip 101, An analog switch 102, a second analog switch 103, a main microphone 104, a reference microphone 105, and an earphone microphone 106; an output end of the first analog switch 102 is connected to a first microphone interface (MIC1) of the main control chip 101, and the main microphone 104 And the reference microphone 105 is respectively connected to the two input ends of the first analog switch 102; the output end of the second analog switch 103 is connected to the second microphone interface (MIC2) of the main control chip 101, and the earphone microphone 106 and the reference microphone 105 are respectively connected.
  • MIC1 first microphone interface
  • MIC2 second microphone interface
  • the main microphone 104 is used to collect the non-headphone call sound, that is, to collect the call sound when the headset is not in use.
  • the reference microphone 105 is used to collect the call noise of the terminal, that is, the background noise other than the voice.
  • the headset microphone 106 is used to collect the headset call sound.
  • the main control chip 101 is configured to disconnect the main control chip 101 and the second analog switch 103 when the terminal makes a call through the main microphone 104, and control the first analog switch 102 to pass the main microphone 104 and the reference microphone 105 by time division multiplexing. The manner is switched on with the main control chip 101, and the speech sound of the main microphone 104 and the speech noise of the reference microphone 105 are subjected to noise suppression processing.
  • connection between the main control chip 101 and the second analog switch 103 can be disconnected by disconnecting the path of the second microphone interface (MIC2) inside the main chip, but at this time, the main control chip 101 is still connected with the first simulation. Switch 102 maintains the path.
  • the main control chip 101 is further configured to disconnect the main control chip 101 from the first analog switch 102 and control the second when the earphone microphone 106 is connected to the second analog switch (that is, when the terminal makes a call through the earphone microphone 106).
  • the analog switch 103 connects the headphone microphone 106 and the reference microphone 105 to the main control chip 101 in a time division multiplex manner, and performs noise suppression processing by collecting the call sound of the headphone microphone 106 and the call noise of the reference microphone 105.
  • Mike is divided into omnidirectional microphone and one-way wheat Gram, depending on the type of microphone, there will be different noise suppression processing algorithms.
  • the main microphone collects speech and noise
  • the reference microphone only collects noise
  • the two chips are subtracted in the main chip to perform noise suppression.
  • the earphone microphone and the main microphone are the two main forms used by the communication terminal.
  • the voice of the earphone microphone is collected by time division multiplexing through the terminal control chip of the terminal and the second analog switch connected to the main control chip.
  • the noise suppression processing is performed on the call noise of the reference microphone, and the structure is simple, which can effectively suppress the background noise of the call, reduce the wiring space of the motherboard, and effectively save the hardware cost.
  • the main control chip 101 can be a baseband processor main control chip or other audio processing chip.
  • the first analog switch 102 can be a double pole double throw analog switch or a single pole single throw analog switch, or other analog switches, such as a multi-channel analog switch.
  • the terminal noise suppression device of the present invention performs noise suppression processing by collecting the call sound of the main microphone and the call noise of the reference microphone through a time division multiplexing manner through the terminal main control chip and the first analog switch connected on the main control chip.
  • the noise processing device has a single structure, which can effectively suppress the background noise of the call, reduce the wiring space of the motherboard, and effectively save the hardware cost.
  • the present invention performs noise suppression processing on the call sound of the earphone microphone and the call noise of the reference microphone through time division multiplexing by using the second analog switch connected to the main control chip and the main control chip, and realizes the noise suppression process through the earphone microphone.
  • Background noise suppression during a call. 3 is a circuit connection diagram of a terminal noise suppression device according to a third embodiment of the present invention. Referring to FIG. 3, a terminal noise suppression device according to a third embodiment of the present invention is provided, in which the main control chip U1 is The baseband processor main control chip is used, and the two analog switches S1 and S2 are double-pole double-throw analog switches.
  • the two pins of the output end of the analog switch S1 are respectively connected to the positive (Micl) and the negative (Micln) of the first microphone interface (MIC1) of the main control chip U1, and the two input ends of the analog switch S1 are respectively connected with the main The microphone zl and the reference microphone z2; correspondingly, the two pins of the output end of the analog switch S2 are respectively connected to the positive pole (Mic2p) and the negative pole (Mic2n) of the second microphone interface (MIC2) of the master chip U1, and the analog switch S2
  • the two input terminals are respectively connected with a reference microphone z2 and a headphone microphone z3; in addition, in order to realize the control of the main control chip to the analog switches S1, S2, a control line is respectively connected between the main control chip U1 and the analog switches S1, S2 ( In the figure, the line shown by control and the power line (the line shown by Vcc in the figure;); In this embodiment, when the main microphone z1 is used for the
  • the pass state causes the baseband processor to collect the call voice and the call noise collected by the time division multiplexing to the main microphone z1 and the reference microphone z2 to perform noise suppression in the main microphone call state.
  • the baseband processor main control chip U1 controls the disconnection and conduction states of the analog switches S1 and S2, so that the baseband processor is collected into the earphone microphone z3 and the reference microphone.
  • Z2 uses time-division multiplexing to collect the call voice and call noise to perform noise suppression in the headset microphone call state.
  • the apparatus of this embodiment further includes components.
  • R3, R2, CI, C2, C3 and R3, C4, C5, and C6 are matched circuits, and how to place each component depends on the need of acoustic and electrical conversion, and is not limited herein.
  • the terminal noise suppression device of the present invention performs the call sound of the main microphone z1 and the call noise of the reference microphone z2 in a time division multiplexing manner through the terminal baseband processor main control chip and the analog switch S1 connected to the main control chip U1.
  • the noise suppression processing forms a simple structure of the noise processing device, which can effectively suppress the background noise of the call, reduce the wiring space of the motherboard, and effectively save the hardware cost.
  • the present invention performs noise suppression processing by collecting the call sound of the earphone microphone z3 and the call noise of the reference microphone z2 by means of time division multiplexing by using the terminal baseband processor main control chip U1 and the analog switch S2 connected to the main control chip. , to achieve background noise suppression when talking over the headset microphone.
  • the present invention further provides a communication terminal, which may include the terminal noise suppression device described in the first to third embodiments.
  • 4 is a schematic flowchart of a terminal noise suppression method according to a fourth embodiment of the present invention. Referring to FIG. 4, the present invention provides a terminal noise suppression method according to a fourth embodiment, which includes the following steps: S401: A terminal control chip of the terminal controls the connection thereof.
  • the first analog switch connects the main microphone and the reference microphone connected to the first analog switch to the main control chip by means of time division multiplexing;
  • the main control chip of the terminal collects the call sound of the main microphone and the call noise of the reference microphone to perform noise suppression processing.
  • the main control chip of the terminal controls the first analog switch connected thereto to connect the main microphone and the reference microphone connected to the first analog switch to the main control chip in a time division multiplexing manner.
  • the first analog switch is specifically a single-pole single-throw analog switch, or other analog switch, such as a multi-channel analog switch.
  • noise processing is performed, and the currently existing noise processing algorithm can be used. According to the type of Mike, there are different noise suppression processing algorithms.
  • Primary microphone of the embodiment of the invention To collect speech and noise, the reference microphone only collects noise, and subtracting the two in the main chip can suppress noise.
  • the terminal noise suppression method in this embodiment performs noise suppression processing by collecting the call sound of the main microphone and the call noise of the reference microphone by means of time division multiplexing by using the terminal's own main control chip and the first analog switch connected to the main control chip. , the structure of the single, can effectively suppress the background noise of the call, reduce the wiring space of the motherboard, and effectively save hardware costs.
  • 5 is a schematic flowchart of a method for suppressing a terminal noise according to a fifth embodiment of the present invention. Referring to FIG. 5, a method for suppressing a terminal noise according to a fifth embodiment of the present invention is provided. The method includes the following steps: S500, a master of the terminal The control chip detects whether the terminal enters the headset microphone call state, and if so, proceeds to step S503; if not, proceeds to step S501;
  • the main control chip of the terminal controls the first analog switch connected thereto to connect the main microphone and the reference microphone connected to the first analog switch to the main control chip by time division multiplexing;
  • S502 The main control chip of the terminal collects the call sound of the main microphone and the call noise of the reference microphone to perform noise suppression processing, and ends.
  • the main control chip of the terminal controls the second analog switch to connect the earphone microphone and the reference microphone connected to the second analog switch to the main control chip by time division multiplexing.
  • the main control chip of the terminal performs noise suppression processing on the call sound of the earphone microphone and the call noise of the reference microphone, and ends.
  • the main control chip of the terminal detects whether the terminal enters the headset microphone call state.
  • the main control chip may be a baseband processor main control chip or other audio processing chip. The detection may specifically be: detecting whether the terminal has a headset inserted, if yes, indicating that the terminal enters the headset microphone call state, if not, indicating that the terminal performs a call through the primary microphone.
  • Steps S501 and S502 are the same as those in the fourth embodiment, and are not described herein.
  • the main control chip of the terminal disconnects the connection between the main control chip and the first analog switch, and controls the second analog switch to pass the time division multiplexing of the earphone microphone and the reference microphone connected to the second analog switch.
  • the main control chip is turned on; specifically, the second analog switch can be a double-pole double-throw analog switch or a single-pole single-throw analog switch, or can be other analog switches, such as a multi-channel analog switch.
  • noise processing is performed, and the currently existing noise processing algorithm can be used. According to the type of Mike, there are different noise suppression processing algorithms.
  • the main microphone collects speech and noise
  • the reference microphone only collects noise
  • subtracting the two in the main chip can perform noise suppression.
  • the terminal noise suppression method of the present invention performs noise suppression processing by collecting the call sound of the main microphone and the call noise of the reference microphone through a time division multiplexing manner through the terminal main control chip and the first analog switch connected on the main control chip.
  • the formed noise processing device has a single structure, which can effectively suppress the background noise of the call, reduce the wiring space of the motherboard, and effectively save the hardware cost.
  • the present invention performs noise suppression processing on the call sound of the earphone microphone and the call noise of the reference microphone through time division multiplexing by using the second analog switch connected to the main control chip and the main control chip, and realizes the noise suppression process through the earphone microphone. Background noise suppression during a call.

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Description

终端噪声抑制装置、 方法及通讯终端 技术领域 本发明涉及通讯领 i或， 特别涉及到一种终端噪声抑制装置、 方法以及通 讯终端。 背景技术 随着手机等各种通讯终端使用的日益广泛， 各种终端使用环境也各不相 同。 比如人们经常会在公交车、 闹市等嘈杂的环境中使用手机， 在这些环境 下对方通话用户会经常听不清手机中的语音。 由于人们对各种通讯终端在各 种环境中的通话质量更加关注， 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、 清晰可辨的通话， 因此需要尽量减少双方的噪声， 使 通话双方可以清楚交谈， 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， 在芯片内部 经过噪声抑制处理后将语音信号传送给主芯片。但是噪声抑制芯片价格昂贵， 接口众多， 需要 I2C、 晶体、 各种阻容以及匹配电路， 占用主板空间大， 走 线多， 不仅成本上升， 并且占用了主板的大量空间， 使得布局走线成为瓶颈， 大大限制了该方案在众多通讯终端如手机上的应用。 发明内容 本发明的目的之一为提供一种终端噪声抑制装置及方法， 可在有效抑制 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。 本发明的目的之二为提供一种包括上述装置的通讯终端。 具体的， 本发明提供的一种终端噪声抑制装置， 包括终端的主控芯片、 第一模拟开关、 用于釆集非耳机通话声音的主麦克风以及用于釆集所述终端 的通话噪声的参考麦克风； 所述第一模拟开关的输出端连接在所述终端的主控芯片的第一麦克接 口， 所述主麦克风和所述参考麦克风分别连接在所述第一模拟开关的两输入 端； 所述终端的主控芯片用于控制所述第一模拟开关将所述主麦克风和所述 参考麦克风通过时分复用的方式与所述主控芯片接通， 并釆集所述主麦克风 的通话声音和所述参考麦克风的通话噪声进行噪声抑制处理。 优选地， 所述装置还包括第二模拟开关和用于釆集耳机通话声音的耳机 麦克风， 所述第二模拟开关的输出端连接在所述终端的主控芯片的第二麦克 接口， 所述耳机麦克风和所述参考麦克风分别连接在所述第二模拟开关的两 输入端； 所述终端的主控芯片还用于当所述耳机麦克风接入所述第二模拟开关 时， 控制所述第二模拟开关将所述耳机麦克风和所述参考麦克风通过时分复 用的方式与所述主控芯片接通， 并釆集所述耳机麦克风的通话声音和所述参 考麦克风的通话噪声进行噪声抑制处理。 优选地， 所述装置还包括用于保证麦克风的声电转换的麦克匹配电路。 优选地， 所述终端的主控芯片为基带处理器主控芯片。 优选地， 所述第一模拟开关和所述第二模拟开关为双刀双掷模拟开关或 单刀单掷模拟开关。 本发明提供的一种通讯终端， 包括前述的终端噪声抑制装置。 本发明提供的一种终端噪声抑制方法， 包括： 终端的主控芯片控制其上连接的第一模拟开关将所述第一模拟开关上连 接的主麦克风和参考麦克风通过时分复用的方式与所述主控芯片接通； 所述终端的主控芯片釆集所述主麦克风的通话声音和所述参考麦克风的 通话噪声进行噪声抑制处理。 优选地， 所述方法还包括： 所述终端的主控芯片检测终端是否进入耳机麦克风通话状态； 若是， 所述终端的主控芯片控制所述第二模拟开关将所述第二模拟开关 上连接的耳机麦克风和参考麦克风通过时分复用的方式与所述主控芯片接 通; 所述终端的主控芯片釆集所述耳机麦克风的通话声音和所述参考麦克风 的通话噪声进行噪声抑制处理； 否则， 所述终端的主控芯片控制其上连接的第一模拟开关再次将所述第 一模拟开关上连接的主麦克风和参考麦克风通过时分复用的方式与所述主控 芯片接通。 优选地， 所述终端的主控芯片为基带处理器主控芯片。 优选地， 所述第一模拟开关和所述第二模拟开关为双刀双掷模拟开关或 单刀单掷模拟开关。 本发明所述终端噪声抑制装置、 方法及通讯终端， 通过终端自身主控芯 片及主控芯片上连接的第一模拟开关， 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通话噪声进行噪声抑制处理， 形成的噪声处理装置 结构筒单， 可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。 另外， 本发明通过自身主控芯片及主控芯片上连接的第二模拟 开关， 通过时分复用的方式釆集耳机麦克风的通话声音和参考麦克风的通话 噪声进行噪声抑制处理，实现在通过耳机麦克风进行通话时的背景噪声抑制。 附图说明 图 1是本发明第一实施例终端噪声抑制装置的结构示意图； 图 2是本发明第二实施例终端噪声抑制装置的结构示意图； 图 3是本发明第三实施例终端噪声抑制装置的电路连接示意图； 图 4是本发明第四实施例终端噪声抑制方法的流程示意图； 图 5是本发明第五实施例终端噪声抑制方法的流程示意图。 本发明目的的实现、 功能特点及优点将结合实施例， 参照附图做进一步 说明。 具体实施方式 本发明提出一种终端噪声抑制装置、 方法及通讯终端， 通过终端自身主 控芯片及主控芯片上连接的第一模拟开关， 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通话噪声进行噪声抑制处理， 形成的噪声处理 装置结构筒单， 可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。 另外， 本发明通过自身主控芯片及主控芯片上连接的第二 模拟开关， 通过时分复用的方式釆集耳机麦克风的通话声音和参考麦克风的 通话噪声进行噪声抑制处理， 实现在通过耳机麦克风进行通话时的背景噪声 抑制。 图 1是本发明第一实施例终端噪声抑制装置的结构示意图， 参照图 1， 本发明提出第一实施例的一种终端噪声抑制装置， 包括： 主控芯片 101 (终 端的主控芯片；)、 第一模拟开关 102、 主麦克风 104以及参考麦克风 105； 第一模拟开关 102的输出端连接在终端的主控芯片 101的第一麦克接口 ( MIC1 )处， 主麦克风 104和参考麦克风 105分别连接在第一模拟开关 102 的两输入端。 主麦克风 104用于釆集非耳机通话声音， 即在没有釆用耳机通话时， 釆 集通话声音。 参考麦克风 105用于釆集终端的通话噪声， 即话音之外的背景噪声。 主控芯片 101用于控制第一模拟开关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接通， 并釆集主麦克风的通话声音和参考麦克风的通 话噪声进行噪声抑制处理。 麦克分为全向麦克和单向麦克，根据麦克的类型， 会有不同的噪声抑制处理算法。 本发明实施例主麦克釆集语音和噪声， 参考 麦克只釆集噪声， 在主芯片中将两者进行相减运算就可以起到噪声抑制。 具体的， 主控芯片 101可为基带处理器主控芯片或其他音频处理芯片。 第一模拟开关 102可为双刀双掷模拟开关或单刀单掷模拟开关， 也可以是其 他模拟开关， 如多通路模拟开关。 相关技术中， 通过将用于通话的主麦克风和釆集噪声的参考麦克风接入 噪声抑制芯片， 在该芯片内部经过噪声抑制处理后将语音信号传送给主控芯 片。 本实施例的终端噪声抑制装置， 通过终端自身主控芯片及主控芯片上连 接的第一模拟开关， 通过时分复用的方式釆集主麦克风的通话声音和参考麦 克风的通话噪声进行噪声抑制处理， 结构筒单， 可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。 图 2是本发明第二实施例终端噪声抑制装置的结构示意图， 参照图 2， 本发明基于第一实施例提出的第二实施例的一种终端噪声抑制装置， 包括： 主控芯片 101、 第一模拟开关 102、 第二模拟开关 103、 主麦克风 104、 参考 麦克风 105以及耳机麦克风 106; 第一模拟开关 102的输出端连接在主控芯片 101的第一麦克接口（MIC1 ) 处， 主麦克风 104和参考麦克风 105分别连接在第一模拟开关 102的两输入 端； 第二模拟开关 103的输出端连接在主控芯片 101的第二麦克接口（MIC2 ) 处， 耳机麦克风 106和参考麦克风 105分别连接在第二模拟开关 103的两输 入端。 主麦克风 104用于釆集非耳机通话声音， 即在没有釆用耳机通话时， 釆 集通话声音。 参考麦克风 105用于釆集终端的通话噪声， 即话音之外的背景噪声。 耳机麦克风 106用于釆集耳机通话声音。 主控芯片 101用于当终端通过主麦克风 104进行通话时， 断开主控芯片 101与第二模拟开关 103的连接， 并控制第一模拟开关 102将主麦克风 104 和参考麦克风 105通过时分复用的方式与主控芯片 101接通， 并釆集主麦克 风 104的通话声音和参考麦克风 105的通话噪声进行噪声抑制处理。具体的， 可通过断开主芯片内部的第二麦克接口 （MIC2 ) 的通路， 以断开主控芯片 101与第二模拟开关 103的连接， 但是此时， 主控芯片 101仍与第一模拟开 关 102保持通路。 主控芯片 101还用于当耳机麦克风 106接入第二模拟开关时 （即， 终端 通过耳机麦克风 106进行通话时）， 断开主控芯片 101 与第一模拟开关 102 的连接， 并控制第二模拟开关 103将耳机麦克风 106和参考麦克风 105通过 时分复用的方式与主控芯片 101接通， 并釆集耳机麦克风 106的通话声音和 参考麦克风 105的通话噪声进行噪声抑制处理。 麦克分为全向麦克和单向麦 克， 根据麦克的类型， 会有不同的噪声抑制处理算法。 本发明实施例主麦克 釆集语音和噪声， 参考麦克只釆集噪声， 在主芯片中将两者进行相减就可以 起到噪声抑制。 耳机麦克风和主麦克风是通讯终端使用的主要的两种形式， 本实施例通 过终端自身主控芯片及主控芯片上连接的第二模拟开关， 通过时分复用的方 式釆集耳机麦克风的通话声音和参考麦克风的通话噪声进行噪声抑制处理， 结构筒单， 可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。 具体的， 主控芯片 101可为基带处理器主控芯片或其他音频处理芯片。 第一模拟开关 102可为双刀双掷模拟开关或单刀单掷模拟开关， 也可以是其 他模拟开关， 如多通路模拟开关。 本发明终端噪声抑制装置， 通过终端自身主控芯片及主控芯片上连接的 第一模拟开关， 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 的通话噪声进行噪声抑制处理， 形成的噪声处理装置结构筒单， 可在有效抑 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。 另外， 本 发明通过自身主控芯片及主控芯片上连接的第二模拟开关， 通过时分复用的 方式釆集耳机麦克风的通话声音和参考麦克风的通话噪声进行噪声抑制处 理， 实现在通过耳机麦克风进行通话时的背景噪声抑制。 图 3是本发明第三实施例终端噪声抑制装置的电路连接示意图， 参照图 3， 本发明基于第二实施例提出的第三实施例的一种终端噪声抑制装置， 该 装置中主控芯片 U1釆用基带处理器主控芯片， 两个模拟开关 Sl、 S2均为双 刀双掷模拟开关。 具体的， 模拟开关 S1 的输出端的两引脚分别连接在主控 芯片 U1的第一麦克风接口 （MIC1 ) 的正极 ( Micl ) 和负极 ( Micln ) 上， 模拟开关 S1的两输入端分别连接有主麦克风 zl和参考麦克风 z2; 相应的， 模拟开关 S2 的输出端的两引脚分别连接在主控芯片 U1 的第二麦克风接口 ( MIC2 ) 的正极 ( Mic2p ) 和负极 ( Mic2n )上， 模拟开关 S2的两输入端分 别连接有参考麦克风 z2和耳机麦克风 z3; 另外， 为实现主控芯片对模拟开 关 S 1、 S2的控制， 主控芯片 U1与模拟开关 S 1、 S2之间分别连接有控制线 (图中 control所示线路 ) 和电源线 （图中 Vcc所示线路；)； 本实施例当使用 主麦克风 zl进行通话时， 基带处理器主控芯片 U1控制模拟开关 Sl、 S2的 断开与导通状态， 使基带处理器釆集到主麦克风 zl和参考麦克风 z2通过时 分复用釆集到的通话声音及通话噪声， 以进行主麦克风通话状态下的噪声抑 制， 同时， 本实施例当使用耳机麦克风 z3进行通话时， 基带处理器主控芯片 U1控制模拟开关 Sl、 S2的断开与导通状态， 使基带处理器釆集到耳机麦克 风 z3和参考麦克风 z2通过时分复用釆集到的通话声音及通话噪声， 以进行 耳机麦克风通话状态下的噪声抑制。 另外， 为保证麦克风正常进行声电转换， 本实施例的装置还包括由元件
Rl、 R2， CI , C2， C3以及 R3， C4， C5， C6组成的麦克匹配电路， 其中各 元件如何放置， 取决于声电转换的需要， 在此不作限制描述。 本发明终端噪声抑制装置， 通过终端自身基带处理器主控芯片及主控芯 片 U1上连接的模拟开关 S1，通过时分复用的方式釆集主麦克风 zl的通话声 音和参考麦克风 z2的通话噪声进行噪声抑制处理，形成的噪声处理装置结构 筒单， 可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。 另外， 本发明通过终端自身基带处理器主控芯片 U1 及主控芯片上 连接的模拟开关 S2， 通过时分复用的方式釆集耳机麦克风 z3的通话声音和 参考麦克风 z2的通话噪声进行噪声抑制处理，实现在通过耳机麦克风进行通 话时的背景噪声抑制。 相应的， 本发明还提供一种通讯终端， 所述通讯终端可包括前述第一实 施例至第三实施例所述的终端噪声抑制装置。 图 4是本发明第四实施例终端噪声抑制方法的流程示意图， 参照图 4， 本发明提出第四实施例的一种终端噪声抑制方法， 包括步骤： S401 , 终端的主控芯片控制其上连接的第一模拟开关将第一模拟开关上 连接的主麦克风和参考麦克风通过时分复用的方式与主控芯片接通；
S402， 终端的主控芯片釆集主麦克风的通话声音和参考麦克风的通话噪 声进行噪声抑制处理。 如步骤 S401 所述， 终端的主控芯片控制其上连接的第一模拟开关将第 一模拟开关上连接的主麦克风和参考麦克风通过时分复用的方式与主控芯片 接通。 第一模拟开关具体的为单刀单掷模拟开关， 或者其他模拟开关， 如多 通路模拟开关。 如步骤 S402 所述， 进行噪声处理， 可釆用当前已有的噪声处理算法。 才艮据麦克的类型不同， 会有不同的噪声抑制处理算法。 本发明实施例主麦克 釆集语音和噪声， 参考麦克只釆集噪声， 在主芯片中将两者进行相减就可以 起到噪声抑制。 本实施例的终端噪声抑制方法， 通过终端自身主控芯片及主控芯片上连 接的第一模拟开关， 通过时分复用的方式釆集主麦克风的通话声音和参考麦 克风的通话噪声进行噪声抑制处理， 结构筒单， 可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。 图 5是本发明第五实施例终端噪声抑制方法的流程示意图， 参考图 5， 本发明基于第四实施例提出的第五实施例的一种终端噪声抑制方法， 包括步 骤： S500, 终端的主控芯片检测终端是否进入耳机麦克风通话状态， 若是， 执行步骤 S503; 若否， 执行步骤 S501;
S501， 终端的主控芯片控制其上连接的第一模拟开关将第一模拟开关上 连接的主麦克风和参考麦克风通过时分复用的方式与主控芯片接通；
S502， 终端的主控芯片釆集主麦克风的通话声音和参考麦克风的通话噪 声进行噪声抑制处理， 结束。
S503， 终端的主控芯片控制第二模拟开关将第二模拟开关上连接的耳机 麦克风和参考麦克风通过时分复用的方式与主控芯片接通。
S504, 终端的主控芯片釆集耳机麦克风的通话声音和参考麦克风的通话 噪声进行噪声抑制处理， 结束。 如步骤 S500 所述， 终端的主控芯片检测终端是否进入耳机麦克风通话 状态， 具体的， 主控芯片可为基带处理器主控芯片或其他音频处理芯片。 检 测具体可为， 检测终端是否有耳机插入， 如果有则表明终端进入耳机麦克风 通话状态， 如果没有， 则表明终端通过主麦克风进行通话。 步骤 S501、 S502与第四实施例相同， 在此， 不赘述。 如步骤 S503 所述， 终端的主控芯片断开主控芯片与第一模拟开关的连 接， 并控制第二模拟开关将第二模拟开关上连接的耳机麦克风和参考麦克风 通过时分复用的方式与主控芯片接通； 具体的， 第二模拟开关可为双刀双掷 模拟开关或单刀单掷模拟开关，也可以为其他模拟开关，如多通路模拟开关。 如步骤 S504 所述， 进行噪声处理， 可釆用当前已有的噪声处理算法。 才艮据麦克的类型不同， 会有不同的噪声抑制处理算法。 本发明实施例主麦克 釆集语音和噪声， 参考麦克只釆集噪声， 在主芯片中将两者相减就可以起到 噪声抑制。 本发明的终端噪声抑制方法， 通过终端自身主控芯片及主控芯片上连接 的第一模拟开关， 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 风的通话噪声进行噪声抑制处理， 形成的噪声处理装置结构筒单， 可在有效 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。 另外， 本发明通过自身主控芯片及主控芯片上连接的第二模拟开关， 通过时分复用 的方式釆集耳机麦克风的通话声音和参考麦克风的通话噪声进行噪声抑制处 理， 实现在通过耳机麦克风进行通话时的背景噪声抑制。 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等效流程变换， 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。

Claims

权 利 要 求 书
1. 一种终端噪声抑制装置， 其特征在于， 包括终端的主控芯片、 第一模拟 开关、 用于釆集非耳机通话声音的主麦克风以及用于釆集所述终端的通 话噪声的参考麦克风；
所述第一模拟开关的输出端连接在所述终端的主控芯片的第一麦克 接口， 所述主麦克风和所述参考麦克风分别连接在所述第一模拟开关的 两输入端；
所述终端的主控芯片用于控制所述第一模拟开关将所述主麦克风和 所述参考麦克风通过时分复用的方式与所述主控芯片接通， 并釆集所述 主麦克风的通话声音和所述参考麦克风的通话噪声进行噪声抑制处理。
2. 根据权利要求 1所述的装置， 其特征在于， 还包括第二模拟开关和用于 釆集耳机通话声音的耳机麦克风， 所述第二模拟开关的输出端连接在所 述终端的主控芯片的第二麦克接口， 所述耳机麦克风和所述参考麦克风 分别连接在所述第二模拟开关的两输入端；
所述终端的主控芯片还用于当所述耳机麦克风接入所述第二模拟开 关时， 控制所述第二模拟开关将所述耳机麦克风和所述参考麦克风通过 时分复用的方式与所述主控芯片接通， 并釆集所述耳机麦克风的通话声 音和所述参考麦克风的通话噪声进行噪声抑制处理。
3. 根据权利要求 1或 2所述的装置， 其特征在于， 还包括用于保证麦克风 的声电转换的麦克匹配电路。
4. 根据权利要求 1或 2所述的装置， 其特征在于， 所述终端的主控芯片为 基带处理器主控芯片。
5. 根据权利要求 1或 2所述的装置， 其特征在于， 所述第一模拟开关和所 述第二模拟开关为双刀双掷模拟开关或单刀单掷模拟开关。
6. 一种通讯终端， 其特征在于， 包括权利要求 1或 2所述的终端噪声抑制 装置。
7. 一种终端噪声抑制方法， 其特征在于， 包括：
所述终端的主控芯片控制其上连接的第一模拟开关将所述第一模拟 开关上连接的主麦克风和参考麦克风通过时分复用的方式与所述主控芯 片接通；
所述终端的主控芯片釆集所述主麦克风的通话声音和所述参考麦克 风的通话噪声进行噪声抑制处理。
8. 根据权利要求 7所述的噪声抑制方法， 其特征在于， 还包括：
所述终端的主控芯片检测终端是否进入耳机麦克风通话状态； 若是， 所述终端的主控芯片控制所述第二模拟开关将所述第二模拟 开关上连接的耳机麦克风和参考麦克风通过时分复用的方式与所述主控 芯片接通；
所述终端的主控芯片釆集所述耳机麦克风的通话声音和所述参考麦 克风的通话噪声进行噪声抑制处理；
否则， 所述终端的主控芯片控制其上连接的第一模拟开关将所述第 一模拟开关上连接的主麦克风和参考麦克风通过时分复用的方式与所述 主控芯片接通。
9. 根据权利要求 7或 8所述的噪声抑制方法， 其特征在于， 所述终端的主 控芯片为基带处理器主控芯片。
10. 根据权利要求 7或 8所述的噪声抑制方法， 其特征在于， 所述第一模拟 开关和所述第二模拟开关为双刀双掷模拟开关或单刀单掷模拟开关。
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