WO2017113697A1 - 一种兼容模拟耳机正反插的方法及装置 - Google Patents

一种兼容模拟耳机正反插的方法及装置 Download PDF

Info

Publication number
WO2017113697A1
WO2017113697A1 PCT/CN2016/088776 CN2016088776W WO2017113697A1 WO 2017113697 A1 WO2017113697 A1 WO 2017113697A1 CN 2016088776 W CN2016088776 W CN 2016088776W WO 2017113697 A1 WO2017113697 A1 WO 2017113697A1
Authority
WO
WIPO (PCT)
Prior art keywords
mic
codec
interface
analog
respectively connected
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
Application number
PCT/CN2016/088776
Other languages
English (en)
French (fr)
Inventor
赵庆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Le Holdings Beijing Co Ltd
Lemobile Information Technology (Beijing) Co Ltd
Original Assignee
Le Holdings Beijing Co Ltd
Lemobile Information Technology (Beijing) Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Le Holdings Beijing Co Ltd, Lemobile Information Technology (Beijing) Co Ltd filed Critical Le Holdings Beijing Co Ltd
Priority to US15/240,140 priority Critical patent/US20170195778A1/en
Publication of WO2017113697A1 publication Critical patent/WO2017113697A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1041—Mechanical or electronic switches, or control elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/09—Applications of special connectors, e.g. USB, XLR, in loudspeakers, microphones or headphones

Definitions

  • the present invention relates to the field of intelligent electronics, and in particular, to a method and apparatus for compatibility with analog earphones.
  • USB TYPE C interface supports both positive and negative insertions, and people no longer have to worry about the wrong direction.
  • USB TYPE C not only solves the problem of forward and reverse insertion, but also supports USB3.0, and is compatible with the traditional interface definition of USB2.0, and also supports analog audio interface on the traditional interface.
  • FIG. 1 is a schematic diagram of a definition of a TYPE C interface in the prior art.
  • the left channel LEFT of the headset is shared with the USB DN
  • the right channel RIGHT of the headset is shared with the USB DP
  • the MIC and the headset GND The signal is shared by two alternatives; this sharing allows both sets of analog headphones to provide input and output signals on both sides of the interface, enabling the function of analog headphones to be inserted back and forth.
  • FIG. 2 is a schematic diagram of a shared circuit of a TYPE C interface compatible analog earphone in the prior art.
  • the existing TYPE C interface is connected to the USB PHY (physical layer hardware) chip and the CODEC (codec) chip respectively to implement the USB transmission and analog audio function of the earphone, and two analog switches are required.
  • SW1, SW2 to achieve pin sharing (where SW1 control Switching between the left and right channels L, R and the two data lines D+, D-, and SW2 controlling the switching between the MIC and the headphone GND.
  • the loss of the switch itself will increase the recording distortion and affect the recording quality.
  • the increase of the two analog switches will increase the layout area and increase the cost. Therefore, the support of the prior art TYPE C interface compatible with the analog headphones is not satisfactory.
  • Embodiments of the present invention provide a method and apparatus for compatibility with analog earphones, which can reduce system signal loss and reduce cost.
  • the two differential input interfaces of the CODEC, the MIC input interface, are respectively connected to the sideband use signals of the USB TYPE C.
  • a device compatible with the analog earphones of the embodiment of the present invention includes TYPE C and a CODEC, wherein the two differential input interfaces of the CODEC, the MIC input interface, are respectively connected with the sideband of the USB TYPE C. .
  • the two differential input interfaces of the CODEC, the MIC input interface are respectively connected with the sideband use signals of the USB TYPE C.
  • the MIC and GEN selection of the earphone can be completed through the differential input interface of the CODEC, so that only one analog switch is needed to realize the common switching between the left and right audio channels L, R and the two data lines D+ and D-, compared to the prior art two An analog switch saves an analog switch, which reduces the loss of one switch. In addition, the wiring space requirements are reduced and the cost is saved.
  • FIG. 1 is a schematic diagram of a definition of a TYPE C interface in the prior art.
  • FIG. 2 is a schematic diagram of a shared circuit of a TYPE C interface compatible analog earphone in the prior art.
  • FIG. 3 is a schematic diagram of a connection between a CODEC and a TYPE C interface according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a forward-reverse insertion device compatible with an analog earphone according to an embodiment of the present invention.
  • the method for positive and negative insertion of the analog earphone utilizes the characteristic of the differential input of the CODEC to extract the two differential input interfaces of the CODEC, the MIC input interface, and respectively use the two sidebands of the TYPE C interface ( SBU, Side Band Use) Signal pins SBU1 and SBU2 are connected to realize the indiscriminate connection with the MIC signal and GND of the analog headphones.
  • SBU Side Band Use
  • FIG. 3 is a schematic diagram of a connection between a CODEC and a TYPE C interface according to an embodiment of the present invention.
  • the two differential input interfaces of the CODEC are the two MIC inputs (MIC IN) of the MIC- and MIC+, respectively.
  • MIC IN the two MIC inputs
  • the CODEC can be guaranteed. The correctness of the signal.
  • the two MIC inputs are also respectively coupled to the MIC bias bias voltage interface of the CODEC via a resistor.
  • the MIC- and MIC+ interfaces of the CODEC are respectively connected to the MIC bias bias voltage interface of the CODEC through a resistor to divide the external microphone.
  • the MIC bias since the impedance of the currently used external microphone is usually 2.2k, the MIC bias has a resistance value of 2.2K with the MIC- and MIC+ interfaces, respectively.
  • the voltage divider resistance value may also change as the impedance of the subsequent external microphone changes.
  • the MIC- and MIC+ signals are respectively coupled to the MIC bias via a capacitor.
  • the capacitor is located before the voltage dividing resistor.
  • FIG. 4 is a schematic structural diagram of a forward-reverse insertion device compatible with an analog earphone according to an embodiment of the present invention. As shown in FIG. 4, the original analog switch SW2 of FIG. 2 is replaced with the differential input circuit shown in FIG.
  • the MIC and the headphone GND are selected one by one.
  • the analog switch SW2 in the prior art is omitted, so that only one analog switch is needed for the entire TYPE C wiring.
  • an analog switch is saved, thereby reducing the loss of one switch, and The requirements for wiring space are also reduced a lot, saving costs.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Headphones And Earphones (AREA)
  • Stereophonic Arrangements (AREA)

Abstract

本发明公开了一种兼容模拟耳机正反插的方法及装置，其中，该一种兼容模拟耳机正反插的方法，包括：将CODEC的两个差分输入接口——MIC输入接口分别与USB TYPE C的边带使用信号连接。

Description

一种兼容模拟耳机正反插的方法及装置
相关申请的交叉参考
本申请要求于2015年12月31日提交中国专利局、申请号为201511032315.5、发明名称为“一种兼容模拟耳机正反插的方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及智能电子领域，特别涉及一种兼容模拟耳机正反插的方法及装置。
背景技术
传统USB接口，需要区分正反面，插反了会无法进入。这样使得USB总是插不对的尴尬频频发生。近两年USB TYPE C接口越来越多的被应用于笔记本电脑和手机上，TYPE C接口支持正反插，人们再也不用担心方向插不对了。
USB TYPE C不仅解决了正反插的问题，还支持USB3.0，同时兼容了USB2.0的传统接口定义，并且在传统接口上还支持模拟音频接口。
图1为现有技术中TYPE C接口定义示意图。如图1所示，在兼容模拟耳机接入时，通过一些接口引脚的共用实现：其中耳机的左音道LEFT与USB DN共用，耳机的右音道RIGHT与USB DP共用，MIC和耳机GND信号通过二选一的方式共用；这种共用使得接口两面均可提供一整套模拟耳机的输入输出信号，实现了模拟耳机正反插接入的功能。
具体地，上述共用是通过在手机或者电脑的主板上加模拟开关来实现共用信号的选择。图2为现有技术中TYPE C接口兼容模拟耳机的共用电路的示意图。如图2所示，现有的TYPE C接口分别与USB PHY(物理层硬件)芯片及CODEC(编译码器)芯片连接，以分别实现USB传输和模拟耳机的音频功能时，需要两颗模拟开关SW1、SW2来实现引脚共用(其中SW1控 制左右音道L、R与两数据线D+、D-共用的切换，SW2控制对MIC和耳机GND的二选一共用的切换)。开关本身的损耗会增大录音失真，影响录音质量；另外，两颗模拟开关的增加还会增加布板面积，同时增加成本，故现有技术TYPE C接口兼容模拟耳机的支持效果并不理想。
发明内容
本发明实施例提供了一种兼容模拟耳机正反插的方法及装置，可以减少系统信号损耗，并且降低成本。
本发明实施例所述的一种兼容模拟耳机正反插的方法，包括：
将CODEC的两个差分输入接口——MIC输入接口分别与USB TYPE C的边带使用信号连接。
本发明实施例所述的一种兼容模拟耳机正反插的装置，包括TYPE C以及CODEC，其中，将CODEC的两个差分输入接口——MIC输入接口分别与USB TYPE C的边带使用信号连接。
利用本发明实施例提供的技术方案，TYPE C在和CODEC进行连接实现耳机的音频功能时，通过将CODEC的两个差分输入接口——MIC输入接口分别与USB TYPE C的边带使用信号连接，耳机的MIC和GEN的选择可以通过CODEC的差分输入接口完成，这样仅仅只需要一个模拟开关来实现左右音道L、R与两数据线D+、D-共用切换，相比于现有技术的两个模拟开关，节省了一个模拟开关，进而减少了一个开关的损耗，另外，对布线空间的要求也减少了很多，节省了成本。
附图概述
图1为现有技术中TYPE C接口定义示意图。
图2为现有技术中TYPE C接口兼容模拟耳机的共用电路的示意图。
图3为本发明实施例中CODEC与TYPE C接口的连接示意图。
图4为本发明实施例中兼容模拟耳机正反插装置的结构示意图。
本发明的较佳实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
本发明实施例提供的兼容模拟耳机正反插的方法，利用CODEC支持差分输入的特性，将CODEC的两个差分输入接口——MIC输入接口引出，分别与TYPE C接口的两个边带使用(SBU，Side Band Use)信号引脚SBU1、SBU2连接，以实现与模拟耳机的MIC信号和GND的无差别连接。采用本发明实施例的方式，无论哪一个差分输入被认为是MIC信号或者地GND都可以，这样不管是模拟耳机正插还是反插都能保证信号的输入。
图3为本发明实施例中CODEC与TYPE C接口的连接示意图。如图3所示，将CODEC的两个差分输入接口分别是MIC-和MIC+的两个MIC输入(MIC IN)。这样，用户在插入模拟耳机时，无论是正插还是反插(无论是将MIC-作为MIC信号，将MIC+作为地；还是将MIC+作为地，将MIC-作为MIC信号)，都可以保证CODEC获得的信号的正确性。
在本发明一实施例，优选地，两个MIC输入还分别通过电阻连接至CODEC的MIC bias偏置电压接口。
在本发明一实施例中，将CODEC的MIC-和MIC+接口分别通过电阻连接至CODEC的MIC bias偏置电压接口的目的是为外部的麦克风做分压。
在本发明一实施例中，由于当前常用的外部麦克风的阻抗通常为2.2k，因此，MIC bias分别与MIC-和MIC+接口的电阻值为2.2K。随着后续外部麦克风阻抗的变化，该分压电阻值也可能发生变化。
在本发明一实施例中，MIC-和MIC+信号分别经一电容与MIC bias连接，在本发明一实施例中，电容位于分压电阻前。
图4为本发明实施例中兼容模拟耳机正反插装置的结构示意图。如图4所示，利用图3所示的差分输入电路来替代了图2的原模拟开关SW2。
利用本发明实施例提供的技术方案，在进行MIC和耳机GND的二选一 时省略了现有技术中的模拟开关SW2，使得整个TYPE C接线只需要一个模拟开关，相比于现有技术的两个模拟开关，节省了一个模拟开关，进而减少了一个开关的损耗，另外，对布线空间的要求也减少了很多，节省了成本。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种兼容模拟耳机正反插的方法，其特征在于，包括：
    将CODEC的两个差分输入接口——MIC输入接口分别与USB TYPE C的边带使用信号连接。
  2. 如权利要求1所述的方法，其特征在于，进一步包括：
    两个MIC输入分别通过分压电阻连接至CODEC的MIC bias偏置电压接口。
  3. 如权利要求2所述的方法，其特征在于，所述电阻的阻值为2.2K。
  4. 如权利要求2所述的方法，其特征在于，进一步包括：
    两个MIC输入分别经一电容与MIC bias连接。
  5. 如权利要求4所述的方法，其特征在于，所述电容分别位于所述分压电阻前。
  6. 一种兼容模拟耳机正反插的装置，包括TYPE C以及CODEC，其特征在于，
    所述CODEC的两个差分输入接口——MIC输入接口分别与所述TYPE C的边带使用信号连接。
  7. 如权利要求6所述的装置，其特征在于，所述CODEC的两个MIC输入接口还分别通过电阻连接所述CODEC的MIC bias接口。
  8. 如权利要求7所述的装置，其特征在于，所述电阻的阻值为2.2K。
  9. 如权利要求7所述的装置，其特征在于，进一步包括：
    两个MIC输入分别经一电容与MIC bias连接。
  10. 如权利要求9所述的装置，其特征在于，所述电容分别位于所述分压电阻前。
PCT/CN2016/088776 2015-12-31 2016-07-06 一种兼容模拟耳机正反插的方法及装置 Ceased WO2017113697A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/240,140 US20170195778A1 (en) 2015-12-31 2016-08-18 Method and apparatus for being compatible with forward insertion and inverted insertion of analog earphone

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201511032315.5 2015-12-31
CN201511032315.5A CN105872869A (zh) 2015-12-31 2015-12-31 一种兼容模拟耳机正反插的方法及装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/240,140 Continuation US20170195778A1 (en) 2015-12-31 2016-08-18 Method and apparatus for being compatible with forward insertion and inverted insertion of analog earphone

Publications (1)

Publication Number Publication Date
WO2017113697A1 true WO2017113697A1 (zh) 2017-07-06

Family

ID=56624285

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/088776 Ceased WO2017113697A1 (zh) 2015-12-31 2016-07-06 一种兼容模拟耳机正反插的方法及装置

Country Status (3)

Country Link
US (1) US20170195778A1 (zh)
CN (1) CN105872869A (zh)
WO (1) WO2017113697A1 (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180103232A1 (en) * 2016-10-07 2018-04-12 Flir Systems, Inc. Video transmission systems and methods
US10381787B1 (en) * 2018-05-21 2019-08-13 Cypress Semiconductor Corporation Voltage protection for universal serial bus type-C (USB-C) connector systems
CN110891225B (zh) * 2018-09-07 2022-02-25 中兴通讯股份有限公司 一种音频信号处理方法、装置、设备及存储介质
CN109918041B (zh) * 2019-03-15 2021-01-08 维沃移动通信有限公司 一种音频电路、相关设备及控制方法
KR102596823B1 (ko) * 2019-03-26 2023-11-01 삼성전자주식회사 외부 오디오 장치를 연결하기 위한 방법 및 그 전자 장치
CN109769174B (zh) * 2019-03-27 2024-04-12 上海爻火微电子有限公司 耳机mic正负端的判断电路、方法与电子设备
CN116546410B (zh) * 2022-01-26 2025-11-07 荣耀终端股份有限公司 电子设备接口的接入检测方法、电子设备及存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104572540A (zh) * 2015-02-03 2015-04-29 重庆蓝岸通讯技术有限公司 复用耳机接口实现usb传输的方法及具有该接口的移动终端
EP2905859A1 (en) * 2014-02-07 2015-08-12 Nokia Corporation Charging and audio usage
CN104902096A (zh) * 2015-05-29 2015-09-09 努比亚技术有限公司 移动终端
CN105120404A (zh) * 2015-07-31 2015-12-02 华为技术有限公司 一种音频设备、终端设备及电子设备

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1728082A (zh) * 2005-07-29 2006-02-01 上海贝豪通讯电子有限公司 一种提高耳机接口通用性的方法
US9817442B2 (en) * 2012-02-28 2017-11-14 Razer (Asia-Pacific) Pte. Ltd. Systems and methods for presenting visual interface content
CN102638745A (zh) * 2012-04-09 2012-08-15 广东步步高电子工业有限公司 一种终端设备的耳机兼容方法、系统及其接口电路
CN202696864U (zh) * 2012-05-07 2013-01-23 安徽状元郎电子科技有限公司 一种学习机电路中的咪头模块
CN203167074U (zh) * 2013-01-11 2013-08-28 青岛海信移动通信技术股份有限公司 配置有复用接口的移动终端
US9396148B2 (en) * 2014-03-24 2016-07-19 Nokia Technologies Oy System method for connecting USB Type-C devices by measuring predetermined test patterns between a plurality of connected accessories
KR102391100B1 (ko) * 2015-06-10 2022-04-27 삼성전자주식회사 인터페이스 제공 방법 및 장치
US9910178B2 (en) * 2015-11-30 2018-03-06 Cirrus Logic, Inc. Accessory detection

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2905859A1 (en) * 2014-02-07 2015-08-12 Nokia Corporation Charging and audio usage
CN104572540A (zh) * 2015-02-03 2015-04-29 重庆蓝岸通讯技术有限公司 复用耳机接口实现usb传输的方法及具有该接口的移动终端
CN104902096A (zh) * 2015-05-29 2015-09-09 努比亚技术有限公司 移动终端
CN105120404A (zh) * 2015-07-31 2015-12-02 华为技术有限公司 一种音频设备、终端设备及电子设备

Also Published As

Publication number Publication date
US20170195778A1 (en) 2017-07-06
CN105872869A (zh) 2016-08-17

Similar Documents

Publication Publication Date Title
WO2017113697A1 (zh) 一种兼容模拟耳机正反插的方法及装置
US9338570B2 (en) Method and apparatus for an integrated headset switch with reduced crosstalk noise
WO2017161746A1 (zh) 用户设备
US9002026B2 (en) Headphone with speaker function
CN105263076B (zh) 一种基于usb‑c插头的平衡式耳机及移动终端
WO2015165345A1 (zh) 一种传输方法、移动终端、多声道耳机及音频播放系统
CN201142743Y (zh) 耳机接口电路及具有所述耳机接口电路的手机
TWI539829B (zh) 偵測電路
US20100166237A1 (en) Single earphone for stereo and monaural audio devices
CN106231460B (zh) 耳机接口的复用方法及装置
US8050428B2 (en) Audio signal transmission circuit
WO2018076628A1 (zh) 一种usb接口电路、终端、耳机电路及耳机、存储介质
WO2016074610A1 (zh) 耳机
WO2020037746A1 (zh) 一种带智能转换接口的麦克风及实现方法
CN104105046A (zh) 检测电路
CN203932589U (zh) 一种多功能usb集线器
WO2020187024A1 (zh) 音频电路、相关设备及控制方法
CN204069063U (zh) 一种手机
TW201824880A (zh) 用於耳機單體的耳機放大器電路及其操作方法，以及使用其之具ｕｓｂ介面的耳機裝置
CN102427569A (zh) 耳麦接口与gpio接口复用电路结构
CN206922988U (zh) 耳机、终端以及音频输出系统
CN101419484B (zh) 复合音频接口机箱
CN204347813U (zh) 音码产品及音码通信信道电路
WO2018177242A1 (zh) 一种蓝牙耳机及其分享系统
CN108260040B (zh) 耳机放大器电路及其操作方法，以及耳机装置

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: 16880498

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: 16880498

Country of ref document: EP

Kind code of ref document: A1