WO2011134243A1 - 一种双模双待移动终端中的麦克风电路及其实现方法 - Google Patents

一种双模双待移动终端中的麦克风电路及其实现方法 Download PDF

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Publication number
WO2011134243A1
WO2011134243A1 PCT/CN2010/077840 CN2010077840W WO2011134243A1 WO 2011134243 A1 WO2011134243 A1 WO 2011134243A1 CN 2010077840 W CN2010077840 W CN 2010077840W WO 2011134243 A1 WO2011134243 A1 WO 2011134243A1
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Prior art keywords
multiplexer
processing module
communication system
mic
mobile terminal
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PCT/CN2010/077840
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English (en)
French (fr)
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张驰俊
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中兴通讯股份有限公司
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Publication of WO2011134243A1 publication Critical patent/WO2011134243A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W60/00Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/005Multiple registrations, e.g. multihoming
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/30Reselection being triggered by specific parameters by measured or perceived connection quality data

Definitions

  • the present invention relates to a dual mode dual standby mobile terminal, and more particularly to a microphone (Microphone, MIC) circuit in a dual mode dual standby mobile terminal and an implementation method thereof.
  • Background technique a microphone (Microphone, MIC) circuit in a dual mode dual standby mobile terminal and an implementation method thereof.
  • 3G smart mobile terminals have many additional functions in addition to the functions of ordinary mobile terminals, such as: high-speed data transmission function, web browsing Features and videophone functions, etc., to bring a good experience to users.
  • the dual-mode dual-standby mobile terminal when the user talks in different network standards, the dual-mode dual-standby mobile terminal needs to switch the voice channel, so that the circuit in the MIC circuit is complicated, therefore, the MIC circuit design
  • the quality of the mobile terminal will directly affect the audio indicators of the mobile terminal and the user's call experience.
  • FIG. 1 is a schematic structural diagram of a MIC circuit in a conventional dual mode dual standby mobile terminal, as shown in FIG.
  • the MIC circuit includes: first and second wireless standard baseband processing chips corresponding to two different network standards, first and second radio frequency modules corresponding to the first and second wireless standard baseband processing chips, and first sum
  • the second antenna and the first and second DC blocking capacitors and the like further include an MIC and an analog switch for switching the voice channel, and the like; wherein the first and second wireless standard baseband processing chips internally include respective first and The second voice processing module, the first and second multiplexers, and the first and second determination processing modules, the first wireless system baseband processing chip further includes a general purpose input/output (GPIO) interface.
  • GPIO general purpose input/output
  • the MIC converts the user's voice signal into an analog voice signal and outputs it in real time, and switches to the corresponding voice channel through the analog switch, so that the MIC voice signal is input to the corresponding standard wireless standard baseband processing chip, and the wireless baseband is processed.
  • the multiplexer in the processing chip inputs the voice signal to the voice processing module for subsequent voice processing, and transmits the processed voice signal through the RF module and the antenna.
  • the analog voice signal flows through the analog switch, and then is input to the wireless baseband processing chip through the DC blocking capacitor, wherein the DC blocking capacitor is used to remove the DC bias voltage in the analog voice signal;
  • the switching operation is performed by the first and second judging processing modules and the GPI0 interface, and the like:
  • the wireless communication system determines the communication system of the current mobile terminal, that is, during the call, the first radio frequency module or the second radio frequency module sends the wireless signaling received by the antenna to the first judgment processing module or the second judgment processing module. Then, the first determining processing module or the second determining processing module determines the received wireless signaling to determine the current communication standard of the mobile terminal. If the first determining processing module receives the wireless signaling sent by the first radio frequency module, It can be determined that the current communication system is the same as the first wireless system baseband processing chip, and the GPI0 interface is notified to enable the analog switch to be connected to the voice channel in the first wireless standard baseband processing chip, and correspondingly, the mobile terminal is not used at this time. a communication system corresponding to the second wireless standard baseband processing chip, so the second determination processing module does not receive the wireless signaling;
  • the second judgment processing module receives the wireless signaling sent by the second radio frequency module, Determining that the current communication system is the same as the second wireless standard baseband processing chip, and then notifying the current communication system of the first determination processing module in the form of communication interaction information, and the first determination processing module notifying the GPIO interface to enable the analog switch to be turned on.
  • the voice channel in the second wireless system baseband processing chip correspondingly, because the mobile terminal does not use the communication system corresponding to the first wireless standard baseband processing chip, the first judgment processing module does not receive the wireless signaling.
  • the main object of the present invention is to provide a MIC circuit in a dual mode dual standby mobile terminal and an implementation method thereof, which can avoid the influence of the use of the analog switch on the voice quality and improve the user experience.
  • the invention provides a microphone MIC circuit in a dual mode dual standby mobile terminal, comprising: a MIC, a first judgment processing module and a first multiplexer;
  • the first determining processing module is configured to determine a current communication system, and control the first multiplexer to perform selection of different voice channels;
  • the first multiplexer performs selection of different voice channels under the control of the first determination processing module.
  • the circuit further includes a second multiplexer for receiving an analog voice signal sent by the first multiplexer;
  • the first determining processing module is specifically configured to determine that the current communication system is a communication system, informing the first multiplexer to output the analog voice signal to the first voice processing module; when determining that the current communication system is the second communication system, notifying the first multiplexer to output the analog voice signal to the first Two multiplexer
  • the first multiplexer is specifically configured to receive an analog voice signal sent by the MIC via a DC blocking capacitor; after receiving the notification sent by the first judgment processing module, output the analog voice signal to the first voice processing module; Or output the analog voice signal to the second multiplexer.
  • the circuit further includes a second judgment processing module, configured to receive the wireless signaling sent by the second radio frequency module, and notify the first judgment processing module that the current communication system is the second communication system;
  • the first determining processing module determines a current communication system, and controls the first multiplexer to perform selection of different voice channels, as follows:
  • Determining the current communication system according to the received wireless signaling or communication interaction information. If the wireless signaling sent by the first radio frequency module is received, determining that the current communication system is the first communication standard, the first multiplexing is notified. The device outputs the analog voice signal to the first voice processing module; if the communication interaction information sent by the second judgment processing module is received, determining that the current communication system is the second communication system, notifying the first multiplexer to simulate The voice signal is output to the second multiplexer.
  • first communication system is the same as the communication system processed by the first wireless standard baseband processing chip; and the second communication system is the same as the communication system processed by the second wireless standard baseband processing chip.
  • the DC blocking capacitor is configured to remove a DC bias voltage in an analog voice signal sent by the MIC.
  • the present invention also provides a method for implementing a MIC circuit in a dual mode dual standby mobile terminal, the method comprising:
  • the judging processing module controls the original multiplexer to switch between different voice channels according to the communication system determined by itself.
  • the determining processing module controls the multiplexer to switch between different voice channels.
  • the first multiplexer performs different voice channel selections under the control of the first judgment processing module.
  • the first multiplexer performs different voice channel selections under the control of the first determination processing module, specifically:
  • the first determining processing module determines that the current communication system is the first communication system, and notifies the first multiplexer to send the analog voice signal to the first voice processing module; the first determining processing module determines that the current communication system is the second communication In the system, the first multiplexer is notified to send the analog voice signal to the second multiplexer.
  • the first communication system is the same as the communication method processed by the first wireless standard baseband processing chip; and the second communication system is the same as the communication method processed by the second wireless standard baseband processing chip.
  • the MIC circuit and the implementation method thereof in the dual mode dual standby mobile terminal remove the analog switch in the original MIC circuit, and use the combination of the multiplexer and the judgment processing module to realize the dual mode dual standby movement
  • the terminal performs voice channel switching in different modes of communication. Since the analog switch in the original MIC circuit is omitted, the invention can avoid the interference of the original analog switch on the analog voice signal, improve the voice quality, and improve the user experience; in addition, the invention saves At the same time as the analog switch, the cost of components can also be saved.
  • FIG. 1 is a schematic structural diagram of a MIC circuit in a conventional dual mode dual standby mobile terminal
  • FIG. 2 is a schematic structural diagram of a MIC circuit in a dual mode dual standby mobile terminal according to the present invention
  • FIG. 3 is a schematic flowchart of a method for performing voice channel switching in a MIC circuit according to the present invention. detailed description
  • the basic idea of the invention is: to save the analog switch in the original MIC circuit, and to determine that the processing module controls the original multiplexer to cut different voice channels according to the communication system determined by itself. Change.
  • the method includes: first and second antennas, first and second radio frequency modules, and first and second wireless standard basebands. Processing the chip, the first and second DC blocking capacitors, the MIC, and the like; the first and second wireless system baseband processing chips respectively include: first and second voice processing modules, first and second multiplexers, and First and second judgment processing modules; wherein
  • the first determining processing module is configured to determine a current communication system, and control the first multiplexer to perform selection of different voice channels;
  • the first multiplexer is configured to perform selection of different voice channels under the control of the first determination processing module.
  • the first determining processing module is specifically configured to: when the current communication system is determined to be the first communication system, notify the first multiplexer to output the analog voice signal to the first voice processing module; and determine that the current communication system is the second In the communication system, notifying the first multiplexer to output the analog voice signal to the second multiplexer;
  • the first determining processing module determines the current communication standard according to the received wireless signaling or communication interaction information, and if the wireless signaling sent by the first radio frequency module is received, determining that the current communication standard is the first communication standard And instructing the first multiplexer to output the analog voice signal to the first voice processing module; if receiving the communication interaction information sent by the second determining processing module, determining that the current communication system is the second communication system, then notifying The first multiplexer outputs the analog voice signal to the second multiplexer.
  • the first communication system is the same as the communication system processed by the first wireless system baseband processing chip
  • the second communication system is the same as the communication system processed by the second wireless standard baseband processing chip.
  • the second determining processing module is specifically configured to receive the wireless signaling sent by the second radio frequency module, And in the form of the communication interaction information, the first judgment processing module is currently notified to be the second communication system.
  • the function of the second judgment processing module is the same as the prior art.
  • the first multiplexer is configured to receive an analog voice signal sent by the MIC via a DC blocking capacitor; after receiving the notification sent by the first judgment processing module, output the analog voice signal to the first voice processing module; or The analog voice signal is output to the second multiplexer.
  • the second multiplexer is configured to receive an analog voice signal sent by the first multiplexer and transmit the analog voice signal to the second voice processing module.
  • the first and second multiplexers are original multiplexers each provided with a plurality of input (IN) ports and output (OUT) ports, not all of which are shown in FIG.
  • the implementation method of the MIC circuit in the dual mode dual standby mobile terminal of the present invention is as follows: the analog switch in the original MIC circuit is omitted, and the switching of the voice channel is realized by using the combination of the original multiplexer and the judgment processing module.
  • the analog voice signal sent from the MIC is directly input to the first multiplexer through the first DC blocking capacitor, and enters the first multiplex from the IN port of the first multiplexer. Then, the first multiplexer selects a corresponding OUT port under the control of the first judgment processing module, and outputs the analog voice signal to the first voice processing module; or outputs the analog voice signal to the second multiplexer And then enter the second voice processing module via the second multiplexer.
  • FIG. 3 is a schematic flowchart of a method for performing voice channel switching in a MIC circuit according to the present invention. As shown in FIG. 3, the implementation steps of the process are as follows:
  • Step 301 The MIC outputs an analog voice signal.
  • Step 302 removing a DC bias voltage in the analog voice signal, and then inputting the analog voice signal to the first multiplexer;
  • the analog voice signal outputted by the MIC is input to the first multiplexer through the first DC blocking capacitor corresponding to the first wireless system baseband processing chip, and the first DC blocking capacitor is used to remove the analog voice signal. DC bias voltage.
  • Step 303 The first judgment processing module determines the current communication system, when determined as the first communication system, step 304a is performed; when it is determined to be the second communication system, step 304b is performed;
  • the mobile terminal receives the wireless signaling via the antenna, and the wireless signaling includes the information of the communication standard, and the wireless signaling is transmitted to the judgment processing module via the antenna and the radio frequency module, and the determination processing module determines according to the wireless signaling.
  • Current communication system the wireless signaling includes the information of the communication standard, and the wireless signaling is transmitted to the judgment processing module via the antenna and the radio frequency module, and the determination processing module determines according to the wireless signaling.
  • the first determining processing module may determine that the current communication standard is the first communication standard, then, at this time The second determining processing module does not receive the wireless signaling transmitted by the second antenna and the second radio frequency module, and then performs step 304a; if the second determining processing module receives the second antenna and the second radio frequency module, The second signaling processing module determines that the current communication system is the second communication system, and then the second determination processing module notifies the first determination processing module in the form of communication interaction information that the communication system at this time is the second communication system. Then, the first judgment processing module does not receive the wireless signaling transmitted by the first antenna and the first radio frequency module, and then performs step 304b.
  • the first communication system is the same as the communication system processed by the first wireless standard baseband processing chip
  • the second communication system is the same as the communication system processed by the second wireless standard baseband processing chip.
  • Step 304a The first determining processing module notifies the first multiplexer to output the analog voice signal to the first voice processing module, and then performs step 305a;
  • the first determining processing module notifies the first multiplexer to output the analog voice signal to the first voice processing mode through an idle OUT port connected to the first voice processing module. Block, then step 305a is performed.
  • the multiplexer is an original multiplexer, which is provided with a plurality of IN ports and a plurality of OUT ports, and the IN port and the OUT port are not set in pairs, for example: if the multiplexer has Two IN ports and three OUT ports, the two IN ports respectively can be combined with any one of the three OUT ports to form a channel, as long as the current OUT port is idle.
  • Step 304b The first determining processing module notifies the first multiplexer to output the analog voice signal to the second multiplexer, and enters the second voice processing module via the second multiplexer, and then executes step 305b;
  • the first determining processing module receives the current communication system sent by the second determining processing module in the form of communication interaction information, and notifies the first multiplexer to pass the analog voice signal to the second wireless standard baseband processing chip.
  • the corresponding second DC blocking capacitor is input to the second multiplexer, and then input to the second voice processing module in the existing manner via the second multiplexer, and then step 305b is performed.
  • the second DC blocking capacitor is used to remove the DC bias voltage in the analog voice signal output by the first multiplexer. Since the analog voice signal from which the DC bias voltage has been removed is transmitted through the first multiplexer, the DC bias voltage is again carried, so the analog voice outputted to the first multiplexer via the second DC blocking capacitor is required. The signal performs an operation to remove the DC bias voltage.
  • Step 305a The first voice processing module processes the analog voice signal, and then sends the signal through the first RF module and the first antenna.
  • the first voice processing module after receiving the analog voice signal, the first voice processing module performs operations such as gain control, analog/digital (A/D) conversion, digital signal processing (DSP), and codec, and then After debugging, it is transmitted to the first RF module, and finally sent out through the first antenna.
  • operations such as gain control, analog/digital (A/D) conversion, digital signal processing (DSP), and codec, and then After debugging, it is transmitted to the first RF module, and finally sent out through the first antenna.
  • Step 305b After the second voice processing module processes the analog voice signal, the second shot is performed. The frequency module and the second antenna are sent out;
  • the second voice processing module passes the existing gain control
  • the A/D conversion, DSP, and codec operations are transmitted to the second RF module after being debugged, and finally transmitted through the second antenna.

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Abstract

本发明公开了一种双模双待移动终端中的麦克风(MIC)电路,包括:MIC、第一判断处理模块和第一多路转换器;所述第一判断处理模块,用于确定当前的通信制式,控制第一多路转换器进行不同语音通道的选择;所述第一多路转换器在所述第一判断处理模块的控制下进行不同语音通道的选择。本发明还同时公开了一种双模双待移动终端中的MIC电路的实现方法,本发明提供的MIC电路可避免模拟开关的使用对语音质量的影响,提高用户体验。

Description

一种双模双待移动终端中的麦克风电路及其实现方法 技术领域
本发明涉及双模双待移动终端, 尤其涉及一种双模双待移动终端中的 麦克风(Microphone, MIC ) 电路及其实现方法。 背景技术
随着移动通信技术的迅速发展, 移动终端逐渐向智能化、 小型化以及 高性能的方向发展。 目前, 随着第三代移动通信技术(3rd-Generation, 3G ) 时代的到来, 3G智能移动终端除了具备普通移动终端的功能外, 更具备了 许多附加功能, 例如: 高速数据传输功能、 网页浏览功能和可视电话功能 等, 给用户带来良好的体验。
目前, 由于 3G处于发展初期, 且第二代移动通信技术(2G )移动通 信网并不能简单升级为 3G移动通信网, 因此, 移动终端市场则为 2G移动 终端和 3G移动终端并存的局面, 且 2G移动终端的比重较大。 在基于 2G 和 2.5G的全球移动通讯系统 ( Global System for Mobile Communications, GSM ), 通用分组无线服务技术(General Packet Radio Service, GPRS )和 码分多址(Code Division Multiple Access, CDMA )等多种网络制式不能 摒弃的前提下, 针对 2G和 3G等制式并存的双模双待移动终端的开发就变 得尤为重要。 其中, 对于双模双待移动终端的 MIC电路, 由于用户在不同 网络制式下通话时, 双模双待移动终端需对语音通道进行切换, 使得 MIC 电路中的线路较复杂, 因此, MIC 电路设计的好坏将直接影响移动终端的 音频指标和用户的通话感受。
下面结合附图对现有双模双待移动终端中语音通道的切换方法进行描 述, 图 1为现有双模双待移动终端中的 MIC电路的结构示意图, 如图 1所 示, MIC 电路包括: 对应于两种不同网络制式的第一和第二无线制式基带 处理芯片、 与第一和第二无线制式基带处理芯片对应的第一和第二射频模 块、 以及第一和第二天线以及第一和第二隔直电容等, 还包括 MIC和用于 切换语音通道的模拟开关等; 其中, 所述第一和第二无线制式基带处理芯 片内部包括各自的第一和第二语音处理模块、 第一和第二多路转换器和第 一和第二判断处理模块, 所述第一无线制式基带处理芯片内部还包括通用 输入 /输出 ( General Purpose Input Output, GPIO )接口。
在实际应用过程中, MIC 将用户的语音信号转换为模拟语音信号并实 时输出, 经模拟开关切换到对应的语音通路, 使 MIC语音信号输入到相应 制式的无线制式基带处理芯片, 经无线制式基带处理芯片中的多路转换器 将语音信号输入到语音处理模块, 以便进行后续的语音处理, 并将处理后 的语音信号通过射频模块和天线发送出去。 其中, 所述模拟语音信号流经 模拟开关后, 通过隔直电容后再输入到无线制式基带处理芯片, 所述隔直 电容用于去除模拟语音信号中的直流偏置电压; 所述模拟开关的切换操作 由第一和第二判断处理模块和 GPI0接口等共同协作完成, 具体为:
通过无线信令判断当前移动终端的通信制式, 即: 通话过程中, 第一 射频模块或第二射频模块将通过天线接收到的无线信令发送到第一判断处 理模块或第二判断处理模块, 之后第一判断处理模块或第二判断处理模块 判断接收到的无线信令以确定移动终端当前的通信制式, 如果此时第一判 断处理模块接收到第一射频模块所发的无线信令, 则可确定当前的通信制 式与第一无线制式基带处理芯片的制式相同,则通知 GPI0接口令模拟开关 接通第一无线制式基带处理芯片中的语音通道, 相应的, 此时因移动终端 未釆用与第二无线制式基带处理芯片对应的通信制式, 因此第二判断处理 模块则不会接收到无线信令;
如果此时第二判断处理模块收到第二射频模块所发的无线信令, 则可 确定当前的通信制式与第二无线制式基带处理芯片的制式相同, 之后以通 信交互信息的形式通知第一判断处理模块当前的通信制式, 第一判断处理 模块再通知 GPIO接口令模拟开关接通第二无线制式基带处理芯片中的语 音通道, 相应的, 此时因移动终端未釆用与第一无线制式基带处理芯片对 应的通信制式, 因此第一判断处理模块则不会接收到无线信令。
上述现有的处理方法中, 关于语音通道切换时模拟开关的应用存在一 定缺陷: 从现有技术可知, 模拟开关本身具有一定阻抗, 对流经模拟开关 的信号有干扰, 尽管目前市场上已推出低阻抗或超低阻抗的模拟开关, 但 是移动终端中的 MIC输出的模拟语音信号很小, 非常容易受外界的干扰, 因此, 模拟语音信号在经模拟开关的传输过程中, 将会对模拟语音信号造 成干扰, 进而影响语音质量, 用户的体验不佳。 发明内容
有鉴于此, 本发明的主要目的在于提供一种双模双待移动终端中的 MIC 电路及其实现方法, 可避免模拟开关的使用对语音质量的影响, 提高 用户体验。
为达到上述目的, 本发明的技术方案是这样实现的:
本发明提供了一种双模双待移动终端中的麦克风 MIC 电路, 包括: MIC、 第一判断处理模块和第一多路转换器;
所述第一判断处理模块, 用于确定当前的通信制式, 控制第一多路转 换器进行不同语音通道的选择;
所述第一多路转换器在所述第一判断处理模块的控制下进行不同语音 通道的选择。
该电路还包括第二多路转换器, 用于接收第一多路转换器所发的模拟 语音信号;
相应的, 所述第一判断处理模块, 具体用于确定当前的通信制式为第 一通信制式时, 通知第一多路转换器将模拟语音信号输出到第一语音处理 模块; 确定当前的通信制式为第二通信制式时, 通知第一多路转换器将模 拟语音信号输出到第二多路转换器;
所述第一多路转换器, 具体用于接收 MIC经隔直电容发送的模拟语音 信号; 在收到第一判断处理模块所发的通知后, 将模拟语音信号输出到第 一语音处理模块; 或将模拟语音信号输出到第二多路转换器。
该电路还包括第二判断处理模块, 用于接收第二射频模块所发的无线 信令, 并通知第一判断处理模块当前为第二通信制式;
相应的, 所述第一判断处理模块确定当前的通信制式, 并控制第一多 路转换器进行不同语音通道的选择, 为:
根据收到的无线信令或通信交互信息判断当前的通信制式, 如果收到 第一射频模块所发的无线信令, 则确定当前的通信制式为第一通信制式, 则通知第一多路转换器将模拟语音信号输出到第一语音处理模块; 如果收 到第二判断处理模块所发的通信交互信息, 则确定当前的通信制式为第二 通信制式, 则通知第一多路转换器将模拟语音信号输出到第二多路转换器。
进一步地, 所述第一通信制式与第一无线制式基带处理芯片处理的通 信制式相同; 所述第二通信制式则与第二无线制式基带处理芯片处理的通 信制式相同。
其中, 所述隔直电容, 用于去除 MIC所发的模拟语音信号中的直流偏 置电压。
本发明还提供了一种双模双待移动终端中的 MIC电路的实现方法, 该 方法包括:
判断处理模块根据自身确定的通信制式控制原有的多路转换器进行不 同语音通道的切换。
其中, 所述判断处理模块控制多路转换器进行不同语音通道的切换, 为: 第一多路转换器在第一判断处理模块的控制下进行不同语音通道的选 择。
其中, 所述第一多路转换器在第一判断处理模块的控制下进行不同语 音通道的选择, 具体为:
第一判断处理模块确定当前的通信制式为第一通信制式时, 通知第一 多路转换器将模拟语音信号发送到第一语音处理模块; 第一判断处理模块 确定当前的通信制式为第二通信制式时, 通知第一多路转换器将模拟语音 信号发送到第二多路转换器。
其中, 所述第一通信制式与第一无线制式基带处理芯片处理的通信制 式相同; 所述第二通信制式则与第二无线制式基带处理芯片处理的通信制 式相同。
本发明提供的双模双待移动终端中的 MIC电路及其实现方法, 将原有 MIC电路中的模拟开关去掉,利用多路转换器与判断处理模块的结合使用, 实现了双模双待移动终端在不同制式的通信中进行语音通道的切换。 由于 省掉了原有 MIC电路中的模拟开关, 因此, 本发明可避免原有模拟开关的 使用对模拟语音信号的干扰, 语音质量得到提高, 用户体验有所提高; 此 外, 本发明在省掉模拟开关的同时, 也可相应节省元器件的成本。 附图说明
图 1为现有双模双待移动终端中的 MIC电路的结构示意图;
图 2为本发明双模双待移动终端中的 MIC电路的结构示意图; 图 3为本发明 MIC电路进行语音通道切换的方法实现流程示意图。 具体实施方式
本发明的基本思想是: 省掉原有 MIC电路中的模拟开关, 判断处理模 块根据自身确定的通信制式控制原有的多路转换器进行不同语音通道的切 换。
下面结合附图及具体实施例对本发明作进一步详细说明。
图 2为本发明双模双待移动终端中的 MIC电路的结构示意图, 如图 2 所示, 包括: 第一和第二天线、 第一和第二射频模块、 第一和第二无线制 式基带处理芯片、 第一和第二隔直电容和 MIC等; 所述第一和第二无线制 式基带处理芯片内部分别包括: 第一和第二语音处理模块、 第一和第二多 路转换器和第一和第二判断处理模块; 其中,
所述第一判断处理模块, 用于确定当前的通信制式, 控制第一多路转 换器进行不同语音通道的选择;
所述第一多路转换器, 用于在所述第一判断处理模块的控制下进行不 同语音通道的选择。
所述第一判断处理模块, 具体用于确定当前的通信制式为第一通信制 式时, 通知第一多路转换器将模拟语音信号输出到第一语音处理模块; 确 定当前的通信制式为第二通信制式时, 通知第一多路转换器将模拟语音信 号输出到第二多路转换器;
具体为: 第一判断处理模块根据收到的无线信令或通信交互信息判断 当前的通信制式, 如果收到第一射频模块所发的无线信令, 则确定当前的 通信制式为第一通信制式, 则通知第一多路转换器将模拟语音信号输出到 第一语音处理模块; 如果收到第二判断处理模块所发的通信交互信息, 则 确定当前的通信制式为第二通信制式, 则通知第一多路转换器将模拟语音 信号输出到第二多路转换器。
这里, 假设第一通信制式与第一无线制式基带处理芯片处理的通信制 式相同, 第二通信制式则与第二无线制式基带处理芯片处理的通信制式相 同。
所述第二判断处理模块, 具体用于接收第二射频模块所发的无线信令, 并以通信交互信息的形式通知第一判断处理模块当前为第二通信制式; 本发明中, 第二判断处理模块的功能与现有技术相同。
所述第一多路转换器,用于接收 MIC经隔直电容发送的模拟语音信号; 在收到第一判断处理模块所发的通知后, 将模拟语音信号输出到第一语音 处理模块; 或将模拟语音信号输出到第二多路转换器。
所述第二多路转换器, 用于接收第一多路转换器所发的模拟语音信号, 并将模拟语音信号传输到第二语音处理模块。
本发明中, 所述第一和第二多路转换器为原有的多路转换器, 均设置 有多个输入(IN )端口和输出 (OUT )端口, 图 2中未全部示出。
本发明双模双待移动终端中的 MIC电路的实现方法为: 省掉原有 MIC 电路中的模拟开关, 利用原有的多路转换器与判断处理模块的结合使用实 现语音通道的切换。
这里, 省掉原有的模拟开关后, 从 MIC发出的模拟语音信号直接通过 第一隔直电容输入到第一多路转换器, 从第一多路转换器的 IN端口进入第 一多路转换器, 之后, 第一多路转换器在第一判断处理模块的控制下选择 相应的 OUT端口, 并将模拟语音信号输出到第一语音处理模块; 或将模拟 语音信号输出到第二多路转换器, 再经第二多路转换器进入第二语音处理 模块。
下面结合图 2对本发明 MIC电路进行语音通道切换的方法进行详细描 述。
图 3为本发明 MIC电路进行语音通道切换的方法实现流程示意图, 如 图 3所示, 该流程的实现步骤如下:
步骤 301: MIC输出模拟语音信号;
具体为: 通话过程中, MIC偏置电压使 MIC开始工作, MIC将用户通 话语音转换为模拟语音信号并实时输出。 步骤 302: 去除模拟语音信号中的直流偏置电压, 之后模拟语音信号输 入到第一多路转换器;
具体为: 经 MIC输出的模拟语音信号通过与第一无线制式基带处理芯 片对应的第一隔直电容后, 输入到第一多路转换器, 所述第一隔直电容用 于去除模拟语音信号中的直流偏置电压。
步骤 303: 第一判断处理模块判断当前的通信制式, 确定为第一通信制 式时, 则执行步骤 304a; 确定为第二通信制式时, 则执行步骤 304b;
具体为: 通信过程中, 移动终端会经天线接收到无线信令, 无线信令 中包含通信制式的信息, 无线信令经天线和射频模块传送到判断处理模块, 判断处理模块根据无线信令确定当前的通信制式。
这里, 如果此时第一判断处理模块接收到经第一天线和第一射频模块 传输的无线信令, 第一判断处理模块即可确定当前的通信制式为第一通信 制式, 那么, 此时第二判断处理模块则不会接收到经第二天线和第二射频 模块传输的无线信令, 之后执行步骤 304a; 如果此时第二判断处理模块接 收到经第二天线和第二射频模块传输的无线信令, 第二判断处理模块即可 确定当前的通信制式为第二通信制式, 之后第二判断处理模块以通信交互 信息的形式通知第一判断处理模块此时的通信制式为第二通信制式, 那么, 此时第一判断处理模块则不会接收到经第一天线和第一射频模块传输的无 线信令, 之后执行步骤 304b。
这里, 设第一通信制式与第一无线制式基带处理芯片处理的通信制式 相同, 第二通信制式则与第二无线制式基带处理芯片处理的通信制式相同。
步骤 304a: 第一判断处理模块通知第一多路转换器将模拟语音信号输 出到第一语音处理模块, 之后执行步骤 305a;
具体为: 第一判断处理模块通知第一多路转换器通过与第一语音处理 模块连接的一个空闲的 OUT端口, 将模拟语音信号输出到第一语音处理模 块, 之后执行步骤 305a。
本发明中, 所述多路转换器为原有的多路转换器, 其设置有多个 IN端 口和多个 OUT端口, IN端口和 OUT端口并非成对设置, 例如: 如果多路 转换器有两个 IN端口和三个 OUT端口,所述的两个 IN端口分别可与三个 OUT端口中的任一个对应组成一个通道,只要当前的 OUT端口为空闲即可 使用。
步骤 304b: 第一判断处理模块通知第一多路转换器将模拟语音信号输 出到第二多路转换器, 经第二多路转换器进入第二语音处理模块, 之后执 行步骤 305b;
具体为: 第一判断处理模块收到第二判断处理模块以通信交互信息的 形式所发的当前的通信制式后, 通知第一多路转换器将模拟语音信号经与 第二无线制式基带处理芯片对应的第二隔直电容输入到第二多路转换器, 再经第二多路转换器按已有的方式输入到第二语音处理模块, 之后执行步 骤 305b。
这里, 所述第二隔直电容用于去除第一多路转换器输出的模拟语音信 号中的直流偏置电压。 因为已去除直流偏置电压的模拟语音信号经第一多 路转换器的传输后, 还会再次携带直流偏置电压, 所以需经第二隔直电容 对第一多路转换器输出的模拟语音信号执行去除直流偏置电压的操作。
步骤 305a: 第一语音处理模块对模拟语音信号进行处理后, 经第一射 频模块和第一天线发送出去;
具体为: 第一语音处理模块收到模拟语音信号后, 经已有的增益控制、 模拟 /数字 (A/D )转换、 数字信号处理(Digital Signal Processing, DSP ) 以及编解码等操作, 再经调试后传送给第一射频模块, 最后经第一天线发 送出去。
步骤 305b: 第二语音处理模块对模拟语音信号进行处理后, 经第二射 频模块和第二天线发送出去;
具体为: 第二语音处理模块收到模拟语音信号后, 经已有的增益控制、
A/D转换、 DSP 以及编解码等操作, 再经调试后传送给第二射频模块, 最 后经第二天线发送出去。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围, 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等, 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种双模双待移动终端中的麦克风 MIC电路, 包括: MIC、 第一判 断处理模块和第一多路转换器; 其特征在于,
所述第一判断处理模块, 用于确定当前的通信制式, 控制第一多路转 换器进行不同语音通道的选择;
所述第一多路转换器在所述第一判断处理模块的控制下, 进行不同语 音通道的选择。
2、根据权利要求 1所述的双模双待移动终端中的 MIC电路,其特征在 于, 该电路还包括第二多路转换器, 用于接收第一多路转换器所发的模拟 语音信号;
相应的, 所述第一判断处理模块, 具体用于确定当前的通信制式为第 一通信制式时, 通知第一多路转换器将模拟语音信号输出到第一语音处理 模块; 确定当前的通信制式为第二通信制式时, 通知第一多路转换器将模 拟语音信号输出到第二多路转换器;
所述第一多路转换器, 具体用于接收 MIC经隔直电容发送的模拟语音 信号; 在收到第一判断处理模块所发的通知后, 将模拟语音信号输出到第 一语音处理模块; 或将模拟语音信号输出到第二多路转换器;
3、根据权利要求 2所述的双模双待移动终端中的 MIC电路,其特征在 于, 该电路还包括第二判断处理模块, 用于接收第二射频模块所发的无线 信令, 并通知第一判断处理模块当前为第二通信制式;
相应的, 所述第一判断处理模块确定当前的通信制式, 并控制第一多 路转换器进行不同语音通道的选择, 为:
根据收到的无线信令或通信交互信息判断当前的通信制式, 如果收到 第一射频模块所发的无线信令, 则确定当前的通信制式为第一通信制式, 则通知第一多路转换器将模拟语音信号输出到第一语音处理模块; 如果收到第二判断处理模块所发的通信交互信息, 则确定当前的通信 制式为第二通信制式, 则通知第一多路转换器将模拟语音信号输出到第二 多路转换器。
4、根据权利要求 2或 3所述的双模双待移动终端中的 MIC电路,其特 征在于,
所述第一通信制式与第一无线制式基带处理芯片处理的通信制式相 同; 所述第二通信制式则与第二无线制式基带处理芯片处理的通信制式相 同。
5、根据权利要求 2或 3所述的双模双待移动终端中的 MIC电路,其特 征在于, 所述隔直电容, 用于去除 MIC所发的模拟语音信号中的直流偏置 电压。
6、一种双模双待移动终端中的 MIC电路的实现方法, 其特征在于, 该 方法包括:
判断处理模块根据自身确定的通信制式, 控制原有的多路转换器进行 不同语音通道的切换。
7、根据权利要求 6所述的双模双待移动终端中的 MIC电路的实现方法, 其特征在于, 所述判断处理模块控制多路转换器进行不同语音通道的切换 , 为: 第一多路转换器在第一判断处理模块的控制下进行不同语音通道的选 择。
8、根据权利要求 7所述的双模双待移动终端中的 MIC电路的实现方法, 其特征在于, 所述第一多路转换器在第一判断处理模块的控制下进行不同 语音通道的选择, 为:
第一判断处理模块确定当前的通信制式为第一通信制式时, 通知第一 多路转换器将模拟语音信号发送到第一语音处理模块; 第一判断处理模块 确定当前的通信制式为第二通信制式时, 通知第一多路转换器将模拟语音 信号发送到第二多路转换器。
9、根据权利要求 8所述的双模双待移动终端中的 MIC电路的实现方法, 其特征在于, 所述第一通信制式与第一无线制式基带处理芯片处理的通信 制式相同; 所述第二通信制式则与第二无线制式基带处理芯片处理的通信 制式相同。
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