WO2012171496A1 - 一种音频信号接收、转接装置和音频信号传输系统 - Google Patents

一种音频信号接收、转接装置和音频信号传输系统 Download PDF

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Publication number
WO2012171496A1
WO2012171496A1 PCT/CN2012/077042 CN2012077042W WO2012171496A1 WO 2012171496 A1 WO2012171496 A1 WO 2012171496A1 CN 2012077042 W CN2012077042 W CN 2012077042W WO 2012171496 A1 WO2012171496 A1 WO 2012171496A1
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WIPO (PCT)
Prior art keywords
pin
audio signal
interface
audio
signal
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
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PCT/CN2012/077042
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English (en)
French (fr)
Inventor
李东声
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Tendyron Corp
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Tendyron Corp
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Filing date
Publication date
Application filed by Tendyron Corp filed Critical Tendyron Corp
Priority to US14/105,491 priority Critical patent/US9344790B2/en
Priority to EP12800281.3A priority patent/EP2722941A4/en
Priority to CA2839487A priority patent/CA2839487C/en
Publication of WO2012171496A1 publication Critical patent/WO2012171496A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
    • 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
    • H04R5/00—Stereophonic arrangements
    • H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
    • H04R2201/107—Monophonic and stereophonic headphones with microphone for two-way hands free communication
    • 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
    • H04R2420/03—Connection circuits to selectively connect loudspeakers or headphones to amplifiers
    • 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 electronic technologies, and in particular, to an audio signal receiving apparatus, an audio signal switching apparatus, and an audio signal transmission system.
  • Background Art With the development of audio signal encoding/decoding technology, there are more and more electronic devices that transmit data through an audio interface.
  • the electronic device can be coupled to the mobile communication device via a low-impedance rake interface (e.g., a headphone jack) of a mobile communication device (e.g., a cell phone) to receive an audio signal output by the mobile communication device.
  • a low-impedance rake interface e.g., a headphone jack
  • a mobile communication device e.g., a cell phone
  • an audio signal switching device for example, an audio line
  • the device provides power.
  • FIG. 1 is a schematic structural diagram of an audio line having an audio signal power-receiving function; as shown in FIG. 1, the audio line includes: a rabi interface (such as the earphone plug shown in FIG. 1), and a boosting unit (shown in FIG. 1). Step-up transformer), rectifier unit (rectifier shown in Figure 1), filter unit, USB plug; where: headphone plug, for connecting to the headphone jack of an audio signal transmitting device (for example, a mobile phone), receiving audio signals The audio signal output by the transmitting device.
  • a rabi interface such as the earphone plug shown in FIG. 1
  • Step-up transformer rectifier unit
  • filter unit shown in Figure 1
  • USB plug USB plug
  • headphone plug for connecting to the headphone jack of an audio signal transmitting device (for example, a mobile phone), receiving audio signals The audio signal output by the transmitting device.
  • the headphone plug contains: left channel pin, right channel pin, GND pin (ground pin), MIC (microphone) pin.
  • the left and right channel pins are connected to the same pin of the primary winding of the step-up transformer; the ground pin of the headphone plug is connected to the other pin of the primary winding of the step-up transformer.
  • a step-up transformer consisting of a primary winding and a secondary winding, used to increase the input voltage of the input (primary winding) (usually around IV) to the output voltage of the output (secondary winding) (eg, greater than Or equal to 5V).
  • the primary winding of the step-up transformer consists of two pins, one pin connected to the left channel pin and the right channel pin of the headphone plug, and the other pin connected to the ground pin of the headphone plug. .
  • the output line of the step-up transformer includes two output pins and one tap.
  • the two output pins are respectively connected to the two input pins of the rectifier input, and the tap is connected to the GND pin (ground pin) of the USB plug.
  • a rectifier for rectifying the AC level input to the input and outputting the rectified level through the output.
  • the rectifier includes two input pins at the input end and one output pin at the output end.
  • the rectifier includes two diodes, and the positive poles of the two diodes are respectively connected to the two input pins of the rectifier, and the negative poles of the two diodes are The output pins of the rectifier are connected.
  • the filtering unit includes an input end and an output end for converting the input input level into a smooth DC level and outputting through the output end.
  • the input of the filter unit is connected to the output of the rectifier.
  • the output of the filter unit is connected to the VBUS pin (power pin) of the USB plug, and the VBUS pin is used to supply power to the audio signal receiving device connected to the USB plug.
  • the input end of the filter unit is connected to the output end, and includes a capacitor C1 connected at one end to the input/output terminal, and the other end of the capacitor C1 is connected to the GND pin of the USB plug.
  • the left and right channel pins of the headphone plug are also connected to the D+ pin of the USB plug.
  • the earphone plug of the audio cable can be inserted into the earphone jack of the audio signal transmitting device (for example, a mobile phone), and the USB plug of the audio cable is inserted into the USB slot of the electronic device.
  • the audio signal receiving device obtains power through the VBUS pin of the USB socket/slot, and uses the D+ pin as an audio signal pin, and uses the D- pin as a reference signal pin to receive the audio signal transmitting device through the earphone plug.
  • the audio signal output by the hole is not limited to the hole.
  • the D- pin of the USB jack can be used as an audio signal pin, and the D+ pin can be used as a reference signal pin.
  • the D- pin of the USB jack can be used as an audio signal pin, and the D+ pin can be used as a reference signal pin.
  • the audio cable shown in Fig. 1 can realize the switching function of the headphone interface and the USB interface, and power supply to the audio signal receiving device through the VBUS and GND pins of the USB interface end (USB plug).
  • the D+ and D- pins are respectively used as audio signal pins and reference pins of the audio signal receiving device for audio signals. Receiving, therefore, the MIC pin of the headphone interface end cannot be connected to the audio signal receiving device, which makes the audio signal receiving device unable to transmit a signal to the audio signal transmitting device.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an audio signal receiving that can transmit a signal (MIC signal) to an audio signal transmitting device without increasing the pin of the audio signal receiving device.
  • a signal MIC signal
  • the present invention provides an audio signal transmission system for receiving an audio signal output by an audio signal transmitting apparatus and transmitting a signal thereto, the system comprising: an audio signal switching device, an audio signal receiving device; :
  • the audio signal switching device includes: a rabi interface, a transit interface;
  • the rabi interface is connected to the audio signal sending device, and includes: an audio pin, a GND pin, and a MIC pin;
  • the adapter interface is connected to the audio signal receiving device, and includes: an audio signal pin, a reference signal pin, and a GND pin;
  • the audio signal pin of the adapter interface is connected to the audio pin of the slave interface, and the reference signal pin of the adapter interface is connected to the GND pin of the slave interface;
  • the MIC pin of the rabi interface is connected to the ground pin of the switch interface
  • the audio signal receiving apparatus includes: an audio signal receiving module, a signal sending module, and a receiving end interface;
  • the receiving end interface is connected to the switching end interface, and includes: an audio signal pin, a reference signal pin, and a GND pin;
  • the audio signal receiving module is connected to an audio signal pin and a reference signal pin of the receiving end interface, and receives an audio signal output by the audio signal transmitting device;
  • the signal transmitting module is connected to a reference signal pin of the receiving end interface for transmitting a signal to the audio signal transmitting device by changing a voltage value of the reference signal pin.
  • the signal sending module is further connected to the audio signal pin of the receiving end interface, and changes the voltage value of the audio signal pin with the same change amplitude when changing the voltage value of the reference signal pin. .
  • the signal sending module is further connected to a ground pin of the receiving end interface, and when the voltage value of the reference signal pin is changed, the level of the grounding pin of the receiving end interface is maintained.
  • the preset fixed voltage value is further connected to a ground pin of the receiving end interface, and when the voltage value of the reference signal pin is changed, the level of the grounding pin of the receiving end interface is maintained. The preset fixed voltage value.
  • the audio signal switching device further includes a power supply module
  • the power supply module is connected to a power pin and a ground pin of the switch interface for supplying power to the audio signal receiving device through a power pin and a ground pin of the switch interface.
  • the MIC pin of the Rab interface is connected to the ground pin of the switch interface through a capacitor.
  • the audio pins of the rabi interface include: a left channel pin, and/or a right channel pin.
  • the transit end interface and the receiving end interface are USB interfaces;
  • the audio signal pins of the adapter interface and the receiver interface are one of D+ and D- pins, and the reference signal pins of the adapter interface and the receiver interface are in the D+ and D- pins. another.
  • the present invention also provides an audio signal switching device for connecting with an audio signal transmitting device and an audio signal receiving device, and transmitting a signal between the audio signal transmitting device and the audio signal receiving device; the device comprising: a rabi interface and a turn Terminal interface; characterized in that
  • the rabi interface is connected to the earphone slot of the audio signal transmitting device, and includes: an audio pin, a GND pin, and a MIC pin;
  • the transit end interface is connected to the receiving end interface of the audio signal receiving device, and includes: audio Signal pin, reference signal pin, ground pin;
  • the audio signal pin of the adapter interface is connected to the audio signal pin of the rabi interface, and the reference signal pin of the adapter interface is connected to the GND pin of the rabi interface for
  • the audio signal receiving device transmits an audio signal output by the audio signal transmitting device
  • the MIC pin of the rabi interface is connected to a ground pin of the switch interface; the MIC pin and the GND pin of the mA interface are used to send the audio signal to the audio signal transmitting device The signal output by the receiving device.
  • the audio signal switching device further includes a power supply module
  • the power supply module is connected to a power pin and a ground pin of the switch interface for supplying power to the audio signal receiving device through a power pin and a ground pin of the switch interface.
  • the MIC pin of the Rab interface is connected to the ground pin of the switch interface through a capacitor.
  • the audio pins of the rabi interface include: a left channel pin, and/or a right channel pin.
  • the transit interface is a USB interface;
  • the audio signal pin of the adapter interface is one of the D+ and D- pins
  • the reference signal pin of the adapter interface is the other of the D+ and D- pins.
  • the present invention further provides an audio signal receiving apparatus, comprising: an audio signal receiving module, a signal sending module; wherein the device further comprises a receiving end interface; and the audio signal receiving interface of the audio signal receiving module and the receiving end
  • the pin is connected to the reference signal pin, and receives an audio signal output by the audio signal transmitting device connected thereto;
  • the signal transmitting module is connected to a reference signal pin of the receiving end interface for transmitting a signal to the audio signal transmitting device by changing a voltage value of the reference signal pin.
  • the signal sending module is further connected to the audio signal pin of the receiving end interface, and changes the voltage value of the audio signal pin with the same change amplitude when changing the voltage value of the reference signal pin. .
  • the signal sending module is further connected to a ground pin of the receiving end interface, and when the voltage value of the reference signal pin is changed, the level of the grounding pin of the receiving end interface is maintained. In the pre The fixed voltage value set first.
  • the receiving end interface is a USB interface
  • the audio signal pin of the receiving end interface is one of D+ and D- pins
  • the reference signal pin of the receiving end interface is the other of the D+ and D- pins.
  • the audio signal transmitting device (audio line or audio adapter) of the present invention connects an audio signal transmitting device with an earphone slot or the like as an interface and an audio signal receiving device with an interface such as a USB slot.
  • the audio signal switching device sends an audio signal to the audio signal receiving device through the D+ and D- pins of the USB interface end thereof, and supplies power to the audio signal receiving device through the VBUS pin and the GND pin of the USB interface end;
  • the audio signal switching device receives the signal output from the audio signal receiving device through the D- or D+ pin of its USB interface terminal, and outputs the signal to the audio signal transmitting device through the GND pin of the headphone interface terminal.
  • the audio signal switching device of the present invention can realize the function of bidirectionally transferring the earphone interface device and the USB interface device at a low cost, and output power to the USB interface device through the audio power taking function, and expand the earphone.
  • the function of the interface device and the USB interface device can realize the function of bidirectionally transferring the earphone interface device and the USB interface device at a low cost, and output power to the USB interface device through the audio power taking function, and expand the earphone.
  • the function of the interface device and the USB interface device can realize the function of bidirectionally transferring the earphone interface device and the USB interface device at a low cost, and output power to the USB interface device through the audio power taking function, and expand the earphone.
  • the audio signal receiving device of the USB interface used in conjunction with the audio signal switching device (audio line or audio adapter) of the present invention realizes functions of power taking, audio signal receiving, and signal transmission through four pins of the USB interface. , no need to increase the number of pins, reducing costs.
  • the audio signal receiving device of the USB interface can output a signal by changing the levels of the D+ and D- pins simultaneously with the same change amplitude, and does not affect the receiving function of the audio signal while outputting the signal.
  • FIG. 2 is a schematic structural view of a first embodiment of an audio signal transmission system of the present invention
  • Figure 2a shows a schematic diagram of an audio signal receiving module for receiving differential signals
  • FIG. 3 is a schematic structural view of a second embodiment of an audio signal transmission system of the present invention.
  • FIG. 4 is a schematic structural diagram of a third embodiment of an audio signal transmission system according to the present invention
  • Figure 5 is a diagram showing the replacement of the interface between the audio signal switching device of the present invention and the audio signal transmitting device with other types of power pins, audio signal pins, reference signal pins, and ground pins.
  • the core of the invention is to obtain power from the VBUS pin and the GND pin of the USB interface, and to use one of the D+ and D- pins of the USB interface as an audio signal pin, and the other pin
  • an audio signal receiving apparatus that receives an audio signal as a reference signal pin
  • the signal is outputted outward by changing the level of the reference signal pin; and at the same time, an audio signal switching device (for example, an audio line) connected to the above-described audio signal receiving apparatus
  • the pin used as the reference signal pin for example, D-pin
  • the pin used as the reference signal pin for example, D-pin
  • the pin is connected to the GND pin of the USB interface so that an audio signal transmitting device (such as a mobile communication terminal) connected to the audio line receives a signal through the MIC pin and the GND pin of the headphone interface.
  • FIG. 2 is a schematic structural diagram of a first embodiment of an audio signal transmission system of the present invention; as shown in FIG. 2, the system includes: an audio signal receiving device, an audio signal switching device; the system is configured to receive an audio signal transmitting device through a headphone interface The transmitted audio signal is transmitted to the audio signal transmitting device.
  • the audio signal transmitting device (for example, the mobile communication terminal) includes: an audio signal transmitting module, a MIC (microphone) signal receiving module, and a headphone slot.
  • the earphone slot contains: audio signal pins (for example, left channel pin, right channel pin), MIC pin, GND pin (reference signal pin for audio signal transmitter).
  • audio signal pins for example, left channel pin, right channel pin
  • MIC pin for example, MIC pin
  • GND pin reference signal pin for audio signal transmitter
  • the audio signal sending module is connected to the audio signal pins of the earphone slot (for example, the left channel pin, the right channel pin) and the GND pin, and is used for reference signal transmission through the audio signal pin and the audio signal transmitting end.
  • the foot outputs an audio signal.
  • the MIC signal receiving module is connected to the MIC pin and the GND pin of the earphone slot, and receives the MIC signal through the MIC pin and the GND pin, and is identified according to the difference between the voltage of the MIC pin and the GND pin. Signal.
  • Audio signal switching devices include: headphone plug, power supply module, USB plug.
  • the audio signal switching device may further comprise a DC isolation unit.
  • the headphone plug contains: audio signal pins (for example, left channel pin, right channel pin), MIC pin, GND pin.
  • the USB plug contains: VBUS pin, D+ pin, D- pin, GND pin.
  • the audio signal pin (left channel pin and/or right channel pin) of the earphone plug is connected to the D+ pin of the USB plug, the GND pin of the earphone plug and the D- pin of the USB plug. Connected.
  • the MIC pin of the headphone plug is connected to the GND pin of the USB plug.
  • the MIC pin of the earphone plug can be connected to the GND pin of the USB plug through a DC isolation unit; that is, one end of the DC isolation unit is connected to the MIC pin of the earphone plug, and the other end is connected to the GND pin of the USB plug. , used to isolate the DC level.
  • the audio signal receiving device comprises: a USB slot, an audio receiving module, and a signal sending module.
  • the USB slot contains: VBUS pin, D+ pin, D- pin, GND pin.
  • the VBUS pin in the USB slot is used to power the audio signal receiving device.
  • the audio receiving module is connected to the D+ and D- pins in the USB slot, and the D+ and D- pins are respectively used as reference signal pins of the audio signal pin and the audio signal receiving end, and receive the audio signal.
  • Figure 2a shows a schematic diagram of an audio signal receiving module for receiving differential signals.
  • the audio signal receiving module includes a comparator, and the positive and negative poles of the comparator are respectively connected to the D+ and D- pins, and the ground pin is grounded, and the power pin is connected to the power source, and the output thereof is connected.
  • the foot is used to output a square wave corresponding to the input audio signal.
  • the signal transmitting module can output a signal to the outside through the pins used as reference signal pins in the D+ and D- pins.
  • the signal transmitting module is connected to the D+ and D- pins in the USB slot, and outputs signals by simultaneously changing the levels of the D+ and D- pins with the same change amplitude.
  • the signal transmitting module is connected to the GND pin of the USB slot to maintain the voltage of the GND pin of the USB slot at a preset fixed voltage value.
  • the signal transmitting module simultaneously changes the D+ and D-references with the same change range.
  • the level of the foot outputs a signal, it does not affect the audio receiving module receiving the audio signal.
  • the signal transmitting module only needs to change the level of the D-pin (the reference signal pin of the audio signal receiving end). , and keep the voltage value of the GND pin at a preset fixed voltage value to output the signal normally.
  • FIG. 3 is a schematic structural diagram of a second embodiment of an audio signal transmission system according to the present invention. As shown in FIG. 3, the difference between the second embodiment and the first embodiment is:
  • the audio signal pin (left channel pin and/or right channel pin) of the headphone interface end (headphone plug) is connected to the D- pin of the USB interface end (USB plug),
  • the GND pin of the headphone plug is connected to the D+ pin of the USB plug.
  • the audio receiving module uses the D- and D+ pins as reference signal pins of the audio signal pin and the audio signal receiving end, respectively, to receive the audio signal; when it is not necessary to consider whether or not the audio receiving module is affected
  • the signal transmitting module can output the signal normally by changing the level of the D+ pin (the reference signal pin of the audio signal receiving end).
  • FIG. 4 is a schematic structural diagram of a third embodiment of an audio signal transmission system according to the present invention. As shown in FIG. The difference between the third embodiment and the first embodiment is:
  • the audio signal switching device of Figure 4 has an audio pin (for example, a left channel pin) connected to the primary winding pin of the step-up transformer, and another audio pin (for example, a right channel pin). ) only connected to the D+ pin.
  • an audio pin for example, a left channel pin
  • another audio pin for example, a right channel pin
  • the audio signal transmitting device (audio line or audio adapter) of the present invention connects the audio signal transmitting device with the earphone slot as an interface and the audio signal receiving device with the USB slot as the interface.
  • the audio signal switching device transmits an audio signal to the audio signal receiving device through the D+ and D- pins of the USB interface end thereof, and supplies power to the audio signal receiving device through the VBUS pin and the GND pin of the USB interface terminal;
  • the audio signal switching device receives the signal output by the audio signal receiving device through the D- or D+ pin of the USB interface end, and outputs the signal to the audio signal transmitting device through the GND pin of the headphone interface end.
  • the audio signal switching device of the present invention can realize the function of bidirectionally transferring the earphone interface device and the USB interface device at a low cost, and output power to the USB interface device through the audio power taking function, and expand the earphone.
  • the function of the interface device and the USB interface device can realize the function of bidirectionally transferring the earphone interface device and the USB interface device at a low cost, and output power to the USB interface device through the audio power taking function, and expand the earphone.
  • the function of the interface device and the USB interface device can realize the function of bidirectionally transferring the earphone interface device and the USB interface device at a low cost, and output power to the USB interface device through the audio power taking function, and expand the earphone.
  • the audio signal receiving device of the USB interface used in conjunction with the audio signal switching device (audio line or audio adapter) of the present invention realizes functions of power taking, audio signal receiving, and signal transmission through four pins of the USB interface. , no need to increase the number of pins, reducing costs.
  • the audio signal receiving device of the USB interface can output a signal by changing the levels of the D+ and D- pins simultaneously with the same change amplitude, and does not affect the receiving function of the audio signal while outputting the signal.
  • the above-mentioned rabi interface may be fixedly connected to the audio signal transmitting device.
  • the above-mentioned port eight interface can be divided into a plurality of plugs, for example, an audio signal plug including an audio signal input pin, and a microphone plug including a microphone pin.
  • USB plug in the audio signal switching device can be replaced with a USB slot (collectively referred to as a USB transfer interface), and accordingly, the USB slot in the audio signal receiving device can be replaced with a USB plug (collectively referred to as a USB interface).
  • the interface between the audio signal switching device and the audio signal transmitting device of the present invention may also be other types having other power pins, audio signal pins, reference signal pins, and ground pins.
  • Interface the above interface of the audio signal switching device can be referred to as a transit interface, and the audio signal can be The above interface of the number transmitting device is called a receiving end interface.
  • One of ordinary skill in the art can understand that all or part of the steps carried by the method of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, one or a combination of the steps of the method embodiments is included.
  • each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
  • the integrated modules, if implemented in the form of software functional modules and sold or used as separate products, may also be stored in a computer readable storage medium.
  • the above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Stereophonic Arrangements (AREA)

Abstract

一种音频信号接收、转接装置和音频信号传输系统，上述音频信号转接装置用于与音频信号发送装置和音频信号接收装置相连，在音频信号发送装置和音频信号接收装置之间传输信号；该音频信号转接装置包含：喇叭接口，其包含：音频信号引脚，GND引脚，MIC引脚；转接端接口，其包含：音频信号引脚，参考信号引脚，地线引脚；转接端接口的音频信号引脚与喇叭接口的音频信号引脚相连，转接端接口的参考信号引脚与喇叭接口的GND引脚相连，用于向音频信号接收装置发送音频信号发送装置输出的音频信号；喇叭接口的MIC引脚与转接端接口的地线引脚相连；喇叭接口的MIC引脚和GND引脚用于向音频信号发送装置发送音频信号接收装置输出的信号。

Description

一种音频信号接收、 转接装置和音频信号传输系统
技术领域 本发明涉及电子技术领域， 尤其涉及一种音频信号接收装置、 音频信号转 接装置和音频信号传输系统。 背景技术 随着音频信号编码 /解码技术的发展，通过音频接口传输数据的电子设备越 来越多。 例如， 电子设备可以通过移动通信装置（例如， 手机） 的低阻音圏式 喇八接口 （例如， 耳机接口）与移动通信装置相连， 接收移动通信装置输出的 音频信号。
由于低阻音圏式喇八接口的输出功率很小， 除了功耗很小的电子设备（如 耳机） 以外， 通过低阻音圏式喇八接口接收音频信号的电子设备通常需要使用 外接电源或内置的电池才能正常工作， 增加了电子设备的成本， 增大了电子设 备的体积。
为了解决上述问题， 申请人提出了一种可提供音频信号取电功能的音频信 号转接装置（例如， 音频线） ， 以便在向音频信号接收装置提供音频信号的基 础上， 同时向音频信号接收装置提供电源。
图 1是具有音频信号取电功能的音频线的结构示意图； 如图 1所示， 该音 频线包含： 喇八接口 （如图 1所示的耳机插头） ， 升压单元（如图 1所示的升 压变压器）， 整流单元（如图 1所示的整流器）， 滤波单元， USB插头； 其中： 耳机插头， 用于与音频信号发送装置（例如， 手机） 的耳机插孔相连， 接 收音频信号发送装置输出的音频信号。
耳机插头中包含： 左声道引脚， 右声道引脚， GND 引脚（地线引脚） ， MIC (麦克） 引脚。
左声道引脚和右声道引脚与升压变压器的初级线圏的同一引脚相连； 耳机 插头的地线引脚与升压变压器的初级线圏的另一引脚相连。
此外， 耳机插头的地线引脚还与 USB插头的 D-引脚相连。 升压变压器， 包含初级线圏和次级线圏， 用于将输入端 （初级线圏） 的输 入电压 （通常为 IV左右）提高至输出端 （次级线圏） 的输出电压 （例如， 大 于或等于 5V ) 。
如上所述， 升压变压器的初级线圏包含两个引脚， 一个引脚与耳机插头的 左声道引脚和右声道引脚相连， 另一引脚与耳机插头的地线引脚相连。
升压变压器的输出线圏包含二个输出引脚和一个抽头， 两个输出引脚分别 与整流器输入端的两个输入引脚相连， 抽头与 USB插头的 GND引脚（地线引 脚）相连。
整流器， 用于对输入端输入的交流电平进行整流， 通过输出端输出整流后 的电平。
整流器包含输入端的两个输入引脚， 输出端的一个输出引脚； 相应地， 整 流器中包含两个二极管，二个二极管的正极分别与整流器的两个输入 ^ I脚相连， 二个二极管的负极与整流器的输出引脚相连。
滤波单元， 包含输入端和输出端， 用于将输入端输入的电平转化为平滑直 流电平， 并通过输出端输出。
滤波单元的输入端与整流器的输出端相连，滤波单元的输出端与 USB插头 的 VBUS引脚（电源引脚）相连， 通过 VBUS引脚为与 USB插头相连的音频 信号接收装置提供电源。
滤波单元的输入端和输出端相连，且包含一端与输入端 /输出端相连的电容 C1 , 电容 C1的另一端与 USB插头的 GND引脚相连。
此外，耳机插头的左声道引脚和右声道引脚还与 USB插头的 D+引脚相连。 将图 1所示的音频线与电子设备使用时， 可将音频线的耳机插头插入音频 信号发送装置（例如， 手机）的耳机插孔中， 音频线的 USB插头插入电子设备 的 USB插槽中，音频信号接收装置通过 USB插口 /插槽的 VBUS引脚获得电源， 并将 D+引脚作为音频信号引脚， 将 D-引脚作为参考信号引脚使用， 以接收音 频信号发送装置通过耳机插孔输出的音频信号。
此外， 图 1所示的音频线的结构还可以有多种变换方式， 例如：
( 1 )可以将 USB插口的 D-引脚作为音频信号引脚， 将 D+引脚作为参考 信号引脚使用。 ( 2 )可以仅将耳机插头的一个音频引脚（例如， 左声道引脚）与升压变压 器的初级线圏相连， 而另一音频引脚（例如， 右声道引脚）仅与 D+引脚相连。
由上可知， 图 1所示的音频线可以实现耳机接口和 USB接口的转接功能， 并通过其 USB接口端（ USB插头）的 VBUS和 GND引脚实现向音频信号接收 装置供电。
但是， 使用图 1所示的音频线时， 由于 USB接口端的 GND引脚被占用， D+和 D-引脚又分别被用作音频信号接收装置的音频信号引脚和参考引脚进行 音频信号的接收， 因此耳机接口端的 MIC引脚无法接入音频信号接收装置， 这 使得音频信号接收装置无法向音频信号发送装置发送信号。
发明内容 本发明所要解决的技术问题是， 克服现有技术的不足， 提供一种在无需增 加音频信号接收装置引脚的情况下， 可以向音频信号发送装置发送信号 （MIC 信号） 的音频信号接收装置、 音频信号转接装置和音频信号传输系统。
为了解决上述问题， 本发明提供一种音频信号传输系统， 用于接收音频信 号发送装置输出的音频信号并向其发送信号，该系统包含： 音频信号转接装置， 音频信号接收装置； 其特征在于：
所述音频信号转接装置中包含： 喇八接口， 转接端接口；
所述喇八接口与所述音频信号发送装置相连， 包含：音频引脚， GND引脚， MIC引脚；
所述转接端接口与所述音频信号接收装置相连， 包含： 音频信号引脚， 参 考信号引脚， GND引脚；
所述转接端接口的音频信号引脚与所述喇八接口的音频引脚相连， 转接端 接口的参考信号引脚与所述喇八接口的 GND引脚相连；
所述喇八接口的 MIC引脚与所述转接端接口的地线引脚相连；
所述音频信号接收装置中包含： 音频信号接收模块， 信号发送模块， 接收 端接口； 所述接收端接口与所述转接端接口相连， 包含： 音频信号引脚， 参考信号 引脚， GND引脚；
所述音频信号接收模块与所述接收端接口的音频信号引脚和参考信号引脚 相连， 接收音频信号发送装置输出的音频信号；
所述信号发送模块与所述接收端接口的参考信号引脚相连， 用于通过改变 所述参考信号引脚的电压值的方式向音频信号发送装置发送信号。
此外， 所述信号发送模块还与所述接收端接口的音频信号引脚相连， 并在 改变所述参考信号引脚的电压值时， 以相同的改变幅度改变所述音频信号引脚 的电压值。
此外， 所述信号发送模块还与所述接收端接口的地线引脚相连， 并在改变 所述参考信号引脚的电压值时， 将所述接收端接口的地线引脚的电平保持在预 先设定的固定电压值。
此外， 所述音频信号转接装置中还包含供电模块；
所述供电模块与所述转接端接口的电源引脚和地线引脚相连， 用于通过所 述转接端接口的电源引脚和地线引脚向所述音频信号接收装置提供电源。
此外，所述喇八接口的 MIC引脚通过电容器与所述转接端接口的地线引脚 相连。
此外， 所述喇八接口的音频引脚包括： 左声道引脚、 和 /或右声道引脚。 此外， 所述转接端接口和接收端接口为 USB接口；
所述转接端接口和接收端接口的音频信号引脚为 D+和 D-引脚中的一个， 所述转接端接口和接收端接口的参考信号引脚为 D+和 D-引脚中的另一个。
本发明还提供一种音频信号转接装置， 用于与音频信号发送装置和音频信 号接收装置相连， 在音频信号发送装置和音频信号接收装置之间传输信号； 该 装置包含： 喇八接口和转接端接口； 其特征在于，
所述喇八接口与所述音频信号发送装置的耳机插槽相连， 包含： 音频引脚， GND引脚， MIC引脚；
所述转接端接口与所述音频信号接收装置的接收端接口相连， 包含： 音频 信号引脚， 参考信号引脚， 地线引脚；
所述转接端接口的音频信号引脚与所述喇八接口的音频信号引脚相连， 所 述转接端接口的参考信号引脚与所述喇八接口的 GND 引脚相连， 用于向所述 音频信号接收装置发送所述音频信号发送装置输出的音频信号；
所述喇八接口的 MIC引脚与所述转接端接口的地线引脚相连；所述喇八接 口的 MIC引脚和 GND引脚用于向所述音频信号发送装置发送所述音频信号接 收装置输出的信号。
此外， 所述音频信号转接装置中还包含供电模块；
所述供电模块与所述转接端接口的电源引脚和地线引脚相连， 用于通过所 述转接端接口的电源引脚和地线引脚向所述音频信号接收装置提供电源。
此外，所述喇八接口的 MIC引脚通过电容器与所述转接端接口的地线引脚 相连。
此外， 所述喇八接口的音频引脚包括： 左声道引脚、 和 /或右声道引脚。 此外， 所述转接端接口为 USB接口；
所述转接端接口的音频信号引脚为 D+和 D-引脚中的一个， 所述转接端接 口的参考信号引脚为 D+和 D-引脚中的另一个。
本发明还提供一种音频信号接收装置， 包含： 音频信号接收模块， 信号发 送模块； 其特征在于， 该装置还包含接收端接口； 所述音频信号接收模块与所述接收端接口的音频信号引脚和参考信号引脚 相连， 接收与其相连的音频信号发送装置输出的音频信号；
所述信号发送模块与所述接收端接口的参考信号引脚相连， 用于通过改变 所述参考信号引脚的电压值的方式向音频信号发送装置发送信号。
此外， 所述信号发送模块还与所述接收端接口的音频信号引脚相连， 并在 改变所述参考信号引脚的电压值时， 以相同的改变幅度改变所述音频信号引脚 的电压值。
此外， 所述信号发送模块还与所述接收端接口的地线引脚相连， 并在改变 所述参考信号引脚的电压值时， 将所述接收端接口的地线引脚的电平保持在预 先设定的固定电压值。
此外， 所述接收端接口为 USB接口；
所述接收端接口的音频信号引脚为 D+和 D-引脚中的一个， 所述接收端接 口的参考信号引脚为 D+和 D-引脚中的另一个。
综上所述， 采用本发明的音频信号转接装置（音频线或音频转接头）将以 耳机插槽等为接口的音频信号发送装置和以 USB 插槽等为接口的音频信号接 收装置进行连接后， 一方面音频信号转接装置通过其 USB接口端的 D+和 D- 引脚向音频信号接收装置发送音频信号， 并通过其 USB接口端的 VBUS引脚 及 GND 引脚向音频信号接收装置提供电源； 另一方面， 音频信号转接装置通 过其 USB接口端的 D-或 D+引脚接收音频信号接收装置输出的信号，并将该信 号通过其耳机接口端的 GND 引脚输出至音频信号发送装置。 也就是说， 本发 明的音频信号转接装置可以以较低的成本实现将耳机接口装置与 USB接口装 置进行双向转接的功能，并通过音频取电功能向 USB接口设备输出电源，扩展 了耳机接口装置和 USB接口装置的功能。
此外， 与本发明的音频信号转接装置（音频线或音频转接头） 配合使用的 USB接口的音频信号接收装置通过 USB接口的四个引脚实现了取电、 音频信 号接收和信号发送的功能， 无需增加引脚数量， 降低了成本。 并且， USB接口 的音频信号接收装置可以通过以相同的改变幅度同时改变 D+和 D-引脚的电平 的方式输出信号， 在输出信号的同时， 不影响音频信号的接收功能。
辨围说明 图 1是具有音频信号取电功能的音频线的结构示意图；
图 2是本发明音频信号传输系统第一实施例的结构示意图；
图 2a示出了用于接收差分信号的音频信号接收模块的示意图;
图 3是本发明音频信号传输系统第二实施例的结构示意图；
图 4是本发明音频信号传输系统第三实施例的结构示意图； 图 5是将本发明的本发明的音频信号转接装置和音频信号发送设备之间的 接口替换为其它具有电源引脚、 音频信号引脚、 参考信号引脚、 地线引脚的其 它类型的接口的实施例结构示意图。 r ^ ^ 本发明的核心是， 在通过 USB接口的 VBUS引脚和 GND引脚获取电源， 且将 USB接口的 D+和 D-引脚中的一个引脚作为音频信号引脚，另一个引脚作 为参考信号引脚接收音频信号的音频信号接收装置中， 通过改变参考信号引脚 的电平向外输出信号； 同时， 在与上述音频信号接收装置相连的音频信号转接 装置（例如音频线） 中， 将其 USB接口端 （USB插头） 中作为参考信号引脚 使用的引脚（例如， D-引脚）与其耳机接口端（耳机插头）的 GND引脚相连， 并将其耳机接口端的 MIC引脚与 USB接口端的 GND引脚相连，以便与音频线 相连的音频信号发送装置 （例如移动通信终端）通过耳机接口的 MIC 引脚和 GND引脚接收信号。
下面将结合附图和实施例对本发明进行详细描述。
第一实施例
图 2是本发明音频信号传输系统第一实施例的结构示意图； 如图 2所示， 该系统包含： 音频信号接收装置， 音频信号转接装置； 该系统用于通过耳机接 口接收音频信号发送装置发送的音频信号， 并向音频信号发送装置传输信号。
音频信号发送装置（例如， 移动通信终端） 中包含： 音频信号发送模块， MIC (麦克）信号接收模块， 耳机插槽。
耳机插槽中包含： 音频信号引脚（例如， 左声道引脚， 右声道引脚）， MIC 引脚， GND引脚（音频信号发送端的参考信号引脚） 。
音频信号发送模块， 与耳机插槽的音频信号引脚（例如， 左声道引脚， 右 声道引脚）和 GND 引脚相连， 用于通过音频信号引脚和音频信号发送端的参 考信号引脚输出音频信号。
音频信号发送模块的具体结构及功能为现有技术， 本文不再赘述。
MIC信号接收模块， 与耳机插槽的 MIC引脚和 GND引脚相连， 通过 MIC 引脚和 GND引脚接收 MIC信号， 根据 MIC引脚和 GND引脚电压的差值识别 信号。
MIC信号接收模块的具体结构及功能为现有技术， 本文不再赘述。
音频信号转接装置 （例如， 音频线） 中包含： 耳机插头， 供电模块， USB 插头。 此外， 可选地， 音频信号转接装置还可以包含直流隔离单元。
耳机插头中包含： 音频信号引脚（例如， 左声道引脚， 右声道引脚）， MIC 引脚， GND引脚。
USB插头中包含： VBUS引脚， D+引脚， D-引脚， GND引脚。
本实施例中， 耳机插头的音频信号引脚（左声道引脚和 /或右声道引脚）与 USB插头的 D+引脚相连， 耳机插头的 GND引脚与 USB插头的 D-引脚相连。
此外， 耳机插头的 MIC引脚与 USB插头的 GND引脚相连。
供电模块中各单元的功能及连接关系在前文中已描述， 不再赘述。
可选地，耳机插头的 MIC引脚可以通过直流隔离单元与 USB插头的 GND 引脚相连； 即， 直流隔离单元的一端与耳机插头的 MIC 引脚相连， 另一端与 USB插头的 GND引脚相连， 用于隔离直流电平。
音频信号接收装置中包含： USB插槽， 音频接收模块， 信号发送模块。
USB插槽中包含： VBUS引脚， D+引脚， D-引脚， GND引脚。
USB插槽中的 VBUS引脚用于为音频信号接收装置提供电源。
本实施例中， 音频接收模块与 USB插槽中的 D+和 D-引脚相连， 将 D+和 D-引脚分别作为音频信号引脚和音频信号接收端的参考信号引脚使用， 接收音 频信号。
图 2a示出了用于接收差分信号的音频信号接收模块的示意图。
如图 2a所示，上述音频信号接收模块中包含比较器， 比较器的正极和负极 分别与 D+和 D-引脚相连， 其地线引脚接地， 其电源引脚与电源相连， 其输出 引脚用于输出与输入的音频信号所对应的方波。 信号发送模块可以通过 D+和 D-引脚中作为参考信号引脚使用的引脚向外 输出信号。
本实施例中， 信号发送模块与 USB插槽中的 D+和 D-引脚相连， 通过以相 同的改变幅度同时改变 D+和 D-引脚的电平向外输出信号。
此外，信号发送模块还与 USB插槽的 GND引脚相连，将 USB插槽的 GND 引脚的电压保持在预先设定的固定电压值。
需要注意的是， 由于音频接收模块通过 USB插槽的 D+和 D-引脚的电压值 之差识别音频信号， 因此本实施例中， 信号发送模块以相同的改变幅度同时改 变 D+和 D-引脚的电平来输出信号时， 不会影响音频接收模块接收音频信号。 当不需要考虑是否影响音频接收模块的接收时（例如， 在音频接收模块停止接 收音频信号时）， 信号发送模块只需通过改变 D-引脚（音频信号接收端的参考 信号引脚） 的电平， 并将 GND 引脚的电压值保持在预先设定的固定电压值即 可正常输出信号。
第二实施例
图 3是本发明音频信号传输系统第二实施例的结构示意图； 如图 3所示， 第二实施例与第一实施例的区别为：
在音频信号转接装置中， 耳机接口端 （耳机插头） 的音频信号引脚（左声 道引脚和 /或右声道引脚）与 USB接口端（USB插头）的 D-引脚相连， 耳机插 头的 GND引脚与 USB插头的 D+引脚相连。
相应地， 在音频信号接收装置中， 音频接收模块将 D-和 D+引脚分别作为 音频信号引脚和音频信号接收端的参考信号引脚使用， 接收音频信号； 当不需 要考虑是否影响音频接收模块的接收时， 信号发送模块只需通过改变 D+引脚 (音频信号接收端的参考信号引脚） 的电平即可正常输出信号。
除以上区别以外， 第二实施例中各功能模块的功能以及信号连接关系与第 一实施例相同。
第三实施例
图 4是本发明音频信号传输系统第三实施例的结构示意图； 如图 4所示， 第三施例与第一实施例的区别为：
图 4中的音频信号转接装置耳机插头的一个音频引脚（例如，左声道引脚） 与升压变压器的初级线圏引脚相连， 另一音频引脚（例如， 右声道引脚）仅与 D+引脚相连。
综上所述， 采用本发明的音频信号转接装置（音频线或音频转接头）将以 耳机插槽为接口的音频信号发送装置和以 USB 插槽为接口的音频信号接收装 置进行连接后，一方面音频信号转接装置通过其 USB接口端的 D+和 D-引脚向 音频信号接收装置发送音频信号， 并通过其 USB接口端的 VBUS引脚及 GND 引脚向音频信号接收装置提供电源； 另一方面， 音频信号转接装置通过其 USB 接口端的 D-或 D+引脚接收音频信号接收装置输出的信号， 并将该信号通过其 耳机接口端的 GND 引脚输出至音频信号发送装置。 也就是说， 本发明的音频 信号转接装置可以以较低的成本实现将耳机接口装置与 USB接口装置进行双 向转接的功能， 并通过音频取电功能向 USB接口设备输出电源，扩展了耳机接 口装置和 USB接口装置的功能。
此外， 与本发明的音频信号转接装置（音频线或音频转接头） 配合使用的 USB接口的音频信号接收装置通过 USB接口的四个引脚实现了取电、 音频信 号接收和信号发送的功能， 无需增加引脚数量， 降低了成本。 并且， USB接口 的音频信号接收装置可以通过以相同的改变幅度同时改变 D+和 D-引脚的电平 的方式输出信号， 在输出信号的同时， 不影响音频信号的接收功能。
此外， 上述喇八接口可以固定连接在音频信号发送设备上。
上述喇八接口可以分为多个插头， 例如， 分为包含音频信号输入引脚的音 频信号插头， 以及包含麦克引脚的麦克插头。
此外， 音频信号转接装置中的 USB插头可以换为 USB插槽（可以统称为 USB转接口） ， 相应地， 音频信号接收装置中的 USB插槽可以换为 USB插头 (可以统称为 USB接口 ) 。
如图 5所示， 本发明的音频信号转接装置和音频信号发送设备之间的接口 也可以是其它具有电源引脚、 音频信号引脚、 参考信号引脚、 地线引脚的其它 类型的接口， 可以将音频信号转接装置的上述接口称为转接端接口， 将音频信 号发送设备的上述接口称为接收端接口。 本技术领域的普通技术人员可以理解实现上述实施例方法携带的全部或部 分步骤是可以通过程序来指令相关的硬件完成， 所述的程序可以存储于一种计 算机可读存储介质中，该程序在执行时， 包括方法实施例的步骤之一或其组合。
此外， 在本发明各个实施例中的各功能单元可以集成在一个处理模块中， 也可以是各个单元单独物理存在， 也可以两个或两个以上单元集成在一个模块 中。 上述集成的模块既可以采用硬件的形式实现， 也可以采用软件功能模块的 形式实现。 所述集成的模块如果以软件功能模块的形式实现并作为独立的产品 销售或使用时， 也可以存储在一个计算机可读取存储介质中。
上述提到的存储介质可以是只读存储器， 磁盘或光盘等。
以上所述仅是本发明的优选实施方式， 应当指出， 对于本技术领域的普通 技术人员来说， 在不脱离本发明原理的前提下， 还可以做出若干改进和润饰， 这些改进和润饰也应视为本发明的保护范围。

Claims

权利要求书
1、 一种音频信号传输系统， 用于接收音频信号发送装置输出的音频信 号并向其发送信号， 该系统包含： 音频信号转接装置， 音频信号接收装置； 其 特征在于：
所述音频信号转接装置中包含： 喇八接口， 转接端接口；
所述喇八接口与所述音频信号发送装置相连， 包含：音频引脚， GND引脚， MIC引脚；
所述转接端接口与所述音频信号接收装置相连， 包含： 音频信号引脚， 参 考信号引脚， GND引脚；
所述转接端接口的音频信号引脚与所述喇八接口的音频引脚相连， 转接端 接口的参考信号引脚与所述喇八接口的 GND引脚相连；
所述喇八接口的 MIC引脚与所述转接端接口的地线引脚相连；
所述音频信号接收装置中包含： 音频信号接收模块， 信号发送模块， 接收 端接口；
所述接收端接口与所述转接端接口相连， 包含： 音频信号引脚， 参考信号 引脚， GND引脚；
所述音频信号接收模块与所述接收端接口的音频信号引脚和参考信号引脚 相连， 接收音频信号发送装置输出的音频信号；
所述信号发送模块与所述接收端接口的参考信号引脚相连， 用于通过改变 所述参考信号引脚的电压值的方式向音频信号发送装置发送信号。
2、 如权利要求 1所述的系统， 其特征在于，
所述信号发送模块还与所述接收端接口的音频信号引脚相连， 并在改变所 述参考信号引脚的电压值时， 以相同的改变幅度改变所述音频信号引脚的电压 值。
3、 如权利要求 1或 2所述的系统， 其特征在于，
所述信号发送模块还与所述接收端接口的地线引脚相连， 并在改变所述参 考信号引脚的电压值时， 将所述接收端接口的地线引脚的电平保持在预先设定 的固定电压值。
4、 如权利要求 1所述的系统， 其特征在于,
所述音频信号转接装置中还包含供电模块；
所述供电模块与所述转接端接口的电源引脚和地线引脚相连， 用于通过所 述转接端接口的电源引脚和地线引脚向所述音频信号接收装置提供电源。
5、 如权利要求 1或 4所述的系统， 其特征在于，
所述喇八接口的 MIC引脚通过电容器与所述转接端接口的地线引脚相连。
6、 如权利要求 1所述的系统， 其特征在于，
所述喇八接口的音频引脚包括： 左声道引脚、 和 /或右声道引脚。
7、 如权利要求 1或 2所述的系统， 其特征在于，
所述转接端接口和接收端接口为 USB接口；
所述转接端接口和接收端接口的音频信号引脚为 D+和 D-引脚中的一个， 所述转接端接口和接收端接口的参考信号引脚为 D+和 D-引脚中的另一个。
8、 一种音频信号转接装置， 用于与音频信号发送装置和音频信号接收 装置相连， 在音频信号发送装置和音频信号接收装置之间传输信号； 该装置包 含： 喇八接口和转接端接口； 其特征在于，
所述喇八接口与所述音频信号发送装置的耳机插槽相连， 包含： 音频引脚， GND引脚， MIC引脚；
所述转接端接口与所述音频信号接收装置的接收端接口相连， 包含： 音频 信号引脚， 参考信号引脚， 地线引脚；
所述转接端接口的音频信号引脚与所述喇八接口的音频信号引脚相连， 所 述转接端接口的参考信号引脚与所述喇八接口的 GND 引脚相连， 用于向所述 音频信号接收装置发送所述音频信号发送装置输出的音频信号；
所述喇八接口的 MIC引脚与所述转接端接口的地线引脚相连；所述喇八接 口的 MIC引脚和 GND引脚用于向所述音频信号发送装置发送所述音频信号接 收装置输出的信号。
9、 如权利要求 8所述的装置， 其特征在于，
所述音频信号转接装置中还包含供电模块；
所述供电模块与所述转接端接口的电源引脚和地线引脚相连， 用于通过所 述转接端接口的电源引脚和地线引脚向所述音频信号接收装置提供电源。
10、 如权利要求 8或 9所述的装置， 其特征在于，
所述喇八接口的 MIC引脚通过电容器与所述转接端接口的地线引脚相连。
11、 如权利要求 8所述的装置， 其特征在于，
所述喇八接口的音频引脚包括： 左声道引脚、 和 /或右声道引脚。
12、 如权利要求 8或 9所述的装置， 其特征在于，
所述转接端接口为 USB接口；
所述转接端接口的音频信号引脚为 D+和 D-引脚中的一个， 所述转接端接 口的参考信号引脚为 D+和 D-引脚中的另一个。
13、 一种音频信号接收装置， 包含： 音频信号接收模块， 信号发送模块； 其特征在于， 该装置还包含接收端接口；
所述音频信号接收模块与所述接收端接口的音频信号引脚和参考信号引脚 相连， 接收与其相连的音频信号发送装置输出的音频信号；
所述信号发送模块与所述接收端接口的参考信号引脚相连， 用于通过改变 所述参考信号引脚的电压值的方式向音频信号发送装置发送信号。
14、 如权利要求 13所述的装置， 其特征在于，
所述信号发送模块还与所述接收端接口的音频信号引脚相连， 并在改变所 述参考信号引脚的电压值时， 以相同的改变幅度改变所述音频信号引脚的电压 值。
15、 如权利要求 13或 14所述的装置， 其特征在于，
所述信号发送模块还与所述接收端接口的地线引脚相连， 并在改变所述参 考信号引脚的电压值时， 将所述接收端接口的地线引脚的电平保持在预先设定 的固定电压值。
16、 如权利要求 13或 14所述的装置， 其特征在于，
所述接收端接口为 USB接口；
所述接收端接口的音频信号引脚为 D+和 D-引脚中的一个， 所述接收端接 口的参考信号引脚为 D+和 D-引脚中的另一个。
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