CN103607210B - A kind of audio signal switching and reception device, audio frequency signal transmission system - Google Patents
A kind of audio signal switching and reception device, audio frequency signal transmission system Download PDFInfo
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- CN103607210B CN103607210B CN201310535150.8A CN201310535150A CN103607210B CN 103607210 B CN103607210 B CN 103607210B CN 201310535150 A CN201310535150 A CN 201310535150A CN 103607210 B CN103607210 B CN 103607210B
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Abstract
A kind of audio signal switching and reception device, audio frequency signal transmission system, above-mentioned switching device comprises: audio interface, change-over terminal interface；Described audio interface, for being connected with audio signal dispensing device, comprises: ground wire pin, and at least one audio frequency pin；Described change-over terminal interface, for being connected with audio signal reception device, comprises: audio signal pin, reference signal pin；The audio frequency pin of described audio interface is for receiving the audio signal of audio signal dispensing device output and being connected with the audio signal pin of described change-over terminal interface, and the ground wire pin of described audio interface is connected with the reference signal pin of described change-over terminal interface；Described audio signal pin and reference signal pin are for coupled audio signal reception device output audio signal.
Description
The application is the divisional application of Application No. 201110161129.7.
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of audio signal switching device, audio signal reception device, audio frequency
Signal transmission system.
Background technology
Along with the development of audio-frequency signal coding/decoding technique, got more and more by the electronic equipment of audio interface transmission data.Such as,
Electronic equipment can pass through horn interface (such as, earphone interface) and the mobile communication of mobile communications device (such as, mobile phone)
Device is connected, and receives the audio signal of mobile communications device output.
Additionally, popularizing along with USB interface, substantial amounts of electronic equipment is provided with USB interface, the most how by mobile logical
The horn interface of T unit and the USB interface of electronic equipment carry out audio frequency letter between mobile communications device and electronic equipment
Number transmission be to be presently required to solve the technical problem that.
Horn interface of the prior art turns USB interface patchcord (such as, 3.5mm earphone interface switching USB interface switching
Line) can only be connected with USB main equipment (such as, PC) and horn interface equipment (such as, mobile communications device),
To communicate normally with between USB main equipment at horn interface equipment (such as, mobile communications device).And it is existing
The electronic equipment being provided with USB interface generally falls into USB from equipment, it is impossible to use horn interface of the prior art to turn USB
The patchcord of interface communicates with mobile communications device.
Summary of the invention
The technical problem to be solved is, overcomes the deficiencies in the prior art, it is provided that one can be with horn interface equipment and USB
The audio signal switching device being connected from equipment and corresponding audio signal reception device, and by audio signal switching device and
The audio frequency signal transmission system of audio signal reception device composition, can realize horn interface equipment and USB from equipment (audio signal
Receive device) between audio signal transmission.
In order to solve the problems referred to above, the present invention provides a kind of audio frequency signal transmission system, is used for receiving audio signal dispensing device defeated
The audio signal that goes out also is sent to signal, and this system comprises: audio signal switching device, audio signal reception device；
Described audio signal switching device comprises: audio interface, change-over terminal interface；
Described audio interface is connected with audio signal dispensing device, comprises: ground wire pin, and at least one audio frequency pin；
Described change-over terminal interface is connected with described audio signal reception device, comprises: audio signal pin, reference signal pin；
The audio frequency pin of described audio interface is connected with the audio signal pin of described change-over terminal interface, the ground wire of described audio interface
Pin is connected with the reference signal pin of described change-over terminal interface；
Described audio signal reception device comprises: audio frequency receiver module, receiving terminal interface；
Described receiving terminal interface comprises: audio signal pin, reference signal pin；Described receiving terminal interface and described switching termination
The same pin of mouth is connected；
Described audio frequency receiver module is connected, by described sound with audio signal pin and the reference signal pin of described receiving terminal interface
Frequently signal pins and reference signal pin receive audio signal.
Additionally, described change-over terminal interface and receiving terminal interface are USB interface；
Described audio signal pin is in D+ and the D-pin of described change-over terminal interface and receiving terminal interface, described reference
Signal pins is another in D+ and the D-pin of described change-over terminal interface and receiving terminal interface.
Additionally, the audio interface of described audio signal switching device also comprises Mike's pin；Described audio signal switching device
Change-over terminal interface also comprises ground wire pin；
Described Mike's pin is connected with the ground wire pin of described change-over terminal interface；
Described audio signal reception device also comprises: signal transmitting module；
Described signal transmitting module is connected with described reference signal pin, for the magnitude of voltage by changing described reference signal pin
Mode by described reference signal pin and described Mike's pin to audio signal dispensing device output signal.
Additionally, described signal transmitting module is also connected with described audio signal pin, and changing the electricity of described reference signal pin
During pressure value, change the magnitude of voltage of described audio signal pin with identical change amplitude.
Additionally, described signal transmitting module is also connected with the ground wire pin of receiving terminal interface, and changing described reference signal pin
Magnitude of voltage time, the level of the ground wire pin of described receiving terminal interface is maintained at fixed voltage value set in advance.
Additionally, described audio frequency receiver module comprises: comparator；
The positive pole of described comparator is connected with audio signal pin and the reference signal pin of described receiving terminal interface respectively with negative pole,
The output pin of described comparator is for exporting the square wave corresponding with the audio signal of input；Or the positive pole of described comparator and negative
Pole is connected with reference signal pin and the audio signal pin of described receiving terminal interface respectively, and the output pin of described comparator is used for
Export the square wave corresponding with the audio signal of input.
Additionally, the audio interface of described audio signal switching device comprises two audio frequency pins: left channel pin and R channel draw
Foot.
The present invention also provides for a kind of audio signal switching device, comprises: audio interface, change-over terminal interface；
Described audio interface, for being connected with audio signal dispensing device, comprises: ground wire pin, and at least one audio frequency pin；
Described change-over terminal interface, for being connected with audio signal reception device, comprises: audio signal pin, reference signal pin；
The audio frequency pin of described audio interface is for receiving the audio signal of audio signal dispensing device output and terminating with described switching
The audio signal pin of mouth is connected, and the ground wire pin of described audio interface is connected with the reference signal pin of described change-over terminal interface；
Described audio signal pin and reference signal pin are for coupled audio signal reception device output audio signal.
Additionally, described change-over terminal interface is USB interface；
Described audio signal pin is in D+ and the D-pin of described change-over terminal interface, and described reference signal pin is institute
State in D+ and the D-pin of change-over terminal interface another.
Additionally, described audio interface also comprises Mike's pin；Described change-over terminal interface also comprises ground wire pin；
Described Mike's pin is connected with the ground wire pin of described change-over terminal interface.
Additionally, described audio interface comprises two audio frequency pins: left channel pin and R channel pin.
The present invention also provides for a kind of audio signal reception device, comprises: audio frequency receiver module；It is characterized in that, this device also wraps
Containing receiving terminal interface；
Described receiving terminal interface comprises: audio signal pin, reference signal pin；
Described audio frequency receiver module is connected, by described sound with audio signal pin and the reference signal pin of described receiving terminal interface
Frequently signal pins and reference signal pin receive audio signal.
Additionally, described receiving terminal interface is USB interface；
Described audio signal pin is in D+ and the D-pin of described receiving terminal interface, and described reference signal pin is institute
State in D+ and the D-pin of receiving terminal interface another.
Additionally, described audio signal reception device also comprises: signal transmitting module；
Described signal transmitting module is connected with described reference signal pin, for the magnitude of voltage by changing described reference signal pin
Mode by described reference signal pin and described Mike's pin to audio signal dispensing device output signal.
Additionally, described signal transmitting module is also connected with described audio signal pin, and changing the electricity of described reference signal pin
During pressure value, change the magnitude of voltage of described audio signal pin with identical change amplitude.
Additionally, described signal transmitting module is also connected with the ground wire pin of receiving terminal interface, and changing described reference signal pin
Magnitude of voltage time, the level of the ground wire pin of described receiving terminal interface is maintained at fixed voltage value set in advance.
Additionally, described audio frequency receiver module comprises: comparator；
The positive pole of described comparator with negative pole respectively D+ and D-pin with described receiving terminal interface be connected, described comparator defeated
Go out pin for exporting the square wave corresponding with the audio signal of input.
In sum, the present invention achieves horn interface equipment and the electronic equipment being provided with USB interface with relatively low hardware cost
Signal transfer functions between (audio signal reception device), with the audio signal switching device (such as, tone frequency channel wire) of the present invention
With the use of time, electronic equipment can receive audio signal by USB interface, it is not necessary to arranges independent horn interface, reduces
The cost of electronic equipment, reduces the volume of electronic equipment.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, the required accompanying drawing used in embodiment being described below
It is briefly described, it should be apparent that, the accompanying drawing in describing below is only some embodiments of the present invention, for this area
From the point of view of those of ordinary skill, on the premise of not paying creative work, it is also possible to obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the structural representation of the audio signal switching device first embodiment of the present invention；
Fig. 2 is the structural representation of the audio signal reception device first embodiment of the present invention；
Fig. 3 is the structural representation of audio signal switching device second embodiment of the present invention；
Fig. 4 is the structural representation of audio signal switching device the 3rd embodiment of the present invention；
Fig. 5 is the structural representation of audio signal switching device the 4th embodiment of the present invention；
Fig. 6 is the structural representation of audio signal reception device the 4th embodiment of the present invention；
Fig. 7 is the structural representation of audio signal switching device the 5th embodiment of the present invention；
Fig. 8 is the structural representation of audio signal reception device the 5th embodiment of the present invention；
Fig. 9 is the structural representation that the present invention uses the audio signal switching device of other change-over terminal interface in addition to USB；
Figure 10 is the structural representation that the present invention uses the audio signal reception device of other interface end interface in addition to USB.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Reality based on the present invention
Execute example, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into
Protection scope of the present invention.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " on ", D score, " front ",
Orientation or the position relationship of the instruction such as " afterwards ", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward " are base
In orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description rather than instruction or hint institute
The device that refers to or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the present invention
Restriction.Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or quantity or position.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " install ", " being connected ",
" connect " and should be interpreted broadly, connect for example, it may be fixing, it is also possible to be to removably connect, or be integrally connected；Permissible
It is to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of individual element internal.For the ordinary skill in the art, can understand that above-mentioned term is in the present invention with concrete condition
In concrete meaning.
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail.
Audio signal switching device in the present invention can be that tone frequency channel wire, audio transiting wire, audio repeating are first-class.
First embodiment
Fig. 1 is the structural representation of the audio signal switching device first embodiment of the present invention；As it is shown in figure 1, this audio signal
Switching device comprises: horn interface (headset plug as shown in Figure 1), and (USB as shown in Figure 1 inserts USB switching interface
Head)；Wherein:
Headset plug, is connected for the earphone jack with audio signal dispensing device (such as, mobile phone), receives audio signal and sends out
Send the audio signal that device exports.
Headset plug comprises: audio frequency pin (AUDIO pin as shown in Figure 1), ground wire pin.
USB plug, for being connected with the USB slot of audio signal reception device, exports audio signal to it.
USB plug comprises: power pins (VBUS pin), D+ pin, D-pin, ground wire pin.
In the present embodiment, the audio frequency pin of headset plug is connected with the D+ pin of USB plug, the ground wire pin of headset plug with
The D-pin of USB plug is connected；It is to say, in the present embodiment, audio signal switching device is by the D+ pin of USB plug
As audio signal pin, using D-pin as reference signal pin, export audio signal to audio signal reception device.
When the audio signal switching device of first embodiment of the invention is used with electronic equipment (audio signal reception device), can
The headset plug of audio signal switching device is inserted in the earphone jack of audio signal dispensing device (such as, mobile phone), audio frequency
USB plug/the slot of signal adapting device is connected with the USB slot/plug of electronic equipment, and audio signal switching device is by plug
D-pin, as audio signal pin, is made by the D+ pin of/slot (being referred to as USB switching interface) as reference signal pin
With, to receive the audio signal that audio signal dispensing device is exported by earphone jack, and send it to connected electronics
Equipment (audio signal reception device).
Fig. 2 is the structural representation of the audio signal reception device first embodiment of the present invention；As in figure 2 it is shown, this device comprises:
USB interface (USB slot as shown in Figure 2), audio frequency receiver module.
USB slot, for being connected with the USB plug of audio signal switching device, receives the audio signal of its output.
USB slot comprises: power pins (VBUS pin), D+ pin, D-pin, ground wire pin.
Audio frequency receiver module, is connected with D+ pin and the D-pin of USB slot, using the D+ pin of USB slot as audio frequency
Signal pins, D-pin, as reference signal pin, receives the audio signal transmitted by D+ pin and D-pin.
In the present embodiment, audio frequency receiver module comprises comparator, the positive pole of comparator and negative pole respectively with D+ and D-pin phase
Even, its ground wire pin ground connection, its power pins is connected with power supply, and its output pin is relative with the audio signal of input for output
The square wave answered.
Additionally, the positive pole of comparator can also be connected with D-and D+ pin respectively with negative pole.
The first embodiment of audio frequency signal transmission system of the present invention is by above-mentioned audio signal switching device and audio signal reception device group
Become.
Second embodiment
Fig. 3 is the structural representation of audio signal switching device second embodiment of the present invention；As it is shown on figure 3, the sound of the present invention
Frequently being a difference in that of signal adapting device the second embodiment and first embodiment:
In second embodiment, audio signal switching device using the D-pin of USB plug as audio signal pin and headset plug
Audio frequency pin be connected, D+ pin is connected, to audio signal reception as reference signal pin with the ground wire pin of headset plug
Device output audio signal.
Audio signal reception device the second embodiment is identical with first embodiment.
Second embodiment of audio frequency signal transmission system of the present invention is by above-mentioned audio signal switching device and audio signal reception device group
Become.
3rd embodiment
Fig. 4 is the structural representation of audio signal switching device the 3rd embodiment of the present invention；As shown in Figure 4, the sound of the present invention
Frequently being a difference in that of signal adapting device the 3rd embodiment and first embodiment:
The audio frequency pin of headset plug is divided into: left channel pin and R channel pin.Left channel pin and R channel pin all with USB
The D+ pin (the audio signal pin of USB plug) of plug is connected.
Audio signal reception device the 3rd embodiment is identical with first embodiment.
3rd embodiment of audio frequency signal transmission system of the present invention is by above-mentioned audio signal switching device and audio signal reception device group
Become.
4th embodiment
Fig. 5 is the structural representation of audio signal switching device the 4th embodiment of the present invention；As it is shown in figure 5, this audio signal
Switching device comprises: horn interface (headset plug as shown in Figure 5), and (USB as shown in Figure 5 inserts USB switching interface
Head)；Wherein:
Headset plug, is connected for the earphone jack with audio signal dispensing device (such as, mobile phone), receives audio signal and sends out
Send the audio signal that device exports, and to audio signal dispensing device output signal.
Headset plug comprises: audio frequency pin (AUDIO pin as shown in Figure 5), Mike's pin (MIC pin), ground
Wire pin.
USB plug, for being connected with the USB slot of audio signal reception device, exports audio signal to it, and receives audio frequency
The signal of signal receiving device output.
In the present embodiment, the audio frequency pin of headset plug is connected with the D+ pin of USB plug, the ground wire pin of headset plug with
The D-pin of USB plug is connected；It is to say, in the present embodiment, audio signal switching device is by the D+ pin of USB plug
As audio signal pin, using D-pin as reference signal pin, export audio signal to audio signal reception device.
Additionally, the MIC pin of headset plug is connected with the GND pin of USB plug.
Alternatively, the MIC pin of headset plug can be connected with the GND pin of USB plug by DC-isolation unit；That is,
One end of DC-isolation unit is connected with the MIC pin of headset plug, and the other end is connected with the GND pin of USB plug, uses
In isolated DC level.
In the present embodiment, DC-isolation unit comprises electric capacity C1.
Fig. 6 is the structural representation of audio signal reception device the 4th embodiment of the present invention；As shown in Figure 6, this device comprises:
USB interface (USB slot as shown in Figure 6), audio frequency receiver module, signal transmitting module.
USB slot comprises: VBUS pin, D+ pin, D-pin, GND pin.
VBUS pin in USB slot is for providing power supply for audio signal reception device.
In the present embodiment, audio frequency receiver module is connected with D+ and the D-pin in USB slot, is made respectively by D+ and D-pin
Reference signal pin for audio signal pin and audio signal reception end uses, and receives audio signal.
Signal transmitting module can be by the outside output signal of pin used as reference signal pin in D+ and D-pin.This
In embodiment, signal transmitting module passes through the outside output signal of D-pin.
Alternatively, signal transmitting module is respectively connected with D+ and the D-pin in USB slot, by with identical change amplitude
Change the outside output signal of level of D+ and D-pin simultaneously.
Additionally, signal transmitting module can also be connected with the GND pin of USB slot, by the GND pin of USB slot
Voltage is maintained at fixed voltage value set in advance, namely using GND pin as the reference signal pin of D-pin, with difference
Divide mode output signal.
It should be noted that owing to audio frequency receiver module is by the difference identification audio frequency of the magnitude of voltage of D+ and the D-pin of USB slot
Signal, therefore in the present embodiment, the level that signal transmitting module changes D+ and D-pin with identical change amplitude simultaneously comes defeated
When going out signal, do not interfere with audio frequency receiver module and receive audio signal.When without the concern for whether affecting connecing of audio frequency receiver module
In the time receiving (such as, when audio frequency receiver module stops receiving audio signal), signal transmitting module only need to be by changing D-pin (sound
Frequently the reference signal pin of signal receiving end) level, and the magnitude of voltage of GND pin is maintained at fixing electricity set in advance
Pressure value gets final product normal output signal.
4th embodiment of audio frequency signal transmission system of the present invention is by above-mentioned audio signal switching device and audio signal reception device group
Become.
5th embodiment
Fig. 7 is the structural representation of audio signal switching device the 5th embodiment of the present invention；As it is shown in figure 5, the sound of the present invention
Frequently being a difference in that of signal adapting device the 5th embodiment and the 4th embodiment:
In 5th embodiment, audio signal switching device using the D-pin of USB plug as audio signal pin and headset plug
Audio frequency pin be connected, D+ pin is connected as reference signal pin with the ground wire pin of headset plug.
Fig. 8 is the structural representation of audio signal reception device the 5th embodiment of the present invention；As shown in Figure 6, the sound of the present invention
Frequently being a difference in that of signal receiving device the 5th embodiment and the 4th embodiment:
In 5th embodiment, audio frequency receiver module using the D-pin of USB plug as audio signal pin, using D+ pin as
Reference signal pin, carries out the reception of audio signal；Further, signal transmitting module passes through the outside output signal of D+ pin.
Alternatively, signal transmitting module is respectively connected with D+ and the D-pin in USB slot, by with identical change amplitude
Change the outside output signal of level of D+ and D-pin simultaneously.
Additionally, signal transmitting module can also be connected with the GND pin of USB slot, by the GND pin of USB slot
Voltage is maintained at fixed voltage value set in advance, namely using GND pin as the reference signal pin of D+ pin, with difference
Divide mode output signal.
5th embodiment of audio frequency signal transmission system of the present invention is by above-mentioned audio signal switching device and audio signal reception device group
Become.
Certainly, according to the ultimate principle of the present invention, the horn interface in above-mentioned audio signal switching device embodiment can be replaced
For having audio frequency pin (left channel pin, R channel pin, monophonic pin) and ground wire pin (reference signal pin)
Other type of audio interface.
Additionally, the audio interface of audio signal switching device can be fixedly connected on audio signal dispensing device.
The audio interface of audio signal switching device can be divided into multiple plug, such as, is divided into and comprises audio signal input pin
Audio signal plug, and comprise Mike's plug of Mike's pin.
Additionally, as shown in Figures 9 and 10, can also be wrapped by other between audio signal switching device and audio signal reception device
Contain: the change-over terminal interface/receiving terminal interface of audio signal pin, reference signal pin and ground wire pin is connected.
Any process described otherwise above or method describe and are construed as in flow chart or at this, represent include one or
The module of code, fragment or the part of the executable instruction of the more steps for realizing specific logical function or process, and
The scope of the preferred embodiment of the present invention includes other realization, wherein can not be by order that is shown or that discuss, including root
According to involved function by basic mode simultaneously or in the opposite order, performing function, this should be by embodiments of the invention institute
Belong to those skilled in the art to be understood.
Should be appreciated that each several part of the present invention can realize by hardware, software, firmware or combinations thereof.In above-mentioned enforcement
In mode, multiple steps or method can be with storing the software or firmware that in memory and be performed by suitable instruction execution system
Realize.Such as, if realized with hardware, with the most the same, available following technology well known in the art
In any one or their combination realize: have and patrol for the discrete of logic gates that data signal is realized logic function
Collect circuit, there is the special IC of suitable combination logic gate circuit, programmable gate array (PGA), field programmable gate
Array (FPGA) etc..
Those skilled in the art are appreciated that it is permissible for realizing all or part of step that above-described embodiment method carries
Instructing relevant hardware by program to complete, described program can be stored in a kind of computer-readable recording medium, this journey
Sequence upon execution, including one or a combination set of the step of embodiment of the method.
Additionally, each functional unit in each embodiment of the present invention can be integrated in a processing module, it is also possible to be each
Unit is individually physically present, it is also possible to two or more unit are integrated in a module.Above-mentioned integrated module is the most permissible
The form using hardware realizes, it would however also be possible to employ the form of software function module realizes.If described integrated module is with software merit
Can the form of module realize and as independent production marketing or when using, it is also possible to be stored in the storage of embodied on computer readable and be situated between
In matter.
Storage medium mentioned above can be read only memory, disk or CD etc..
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ",
Or specific features, structure, material or the feature that the description of " some examples " etc. means to combine this embodiment or example describes comprises
In at least one embodiment or example of the present invention.In this manual, the schematic representation to above-mentioned term not necessarily refers to
It is identical embodiment or example.And, the specific features of description, structure, material or feature can at any one or
Multiple embodiments or example combine in an appropriate manner.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art is in the case of without departing from the principle of the present invention and objective
Above-described embodiment can be changed within the scope of the invention, revise, replace and modification.The scope of the present invention is by appended power
Profit requires and equivalent limits.
Claims (17)
1. an audio frequency signal transmission system, for receiving the audio signal of audio signal dispensing device output and being sent to signal,
This system comprises: audio signal switching device, audio signal reception device；It is characterized in that:
Described audio signal switching device comprises: audio interface, change-over terminal interface；
Described audio interface is connected with audio signal dispensing device, comprises: ground wire pin, and at least one audio frequency pin；
Described change-over terminal interface is connected with described audio signal reception device, comprises: audio signal pin, reference signal pin；
The audio frequency pin of described audio interface is connected with the audio signal pin of described change-over terminal interface, the ground wire of described audio interface
Pin is connected with the reference signal pin of described change-over terminal interface；
Described audio signal reception device comprises: audio frequency receiver module, receiving terminal interface；
Described receiving terminal interface comprises: audio signal pin, reference signal pin；Described receiving terminal interface and described switching termination
The same pin of mouth is connected；
Described audio frequency receiver module is connected, by described sound with audio signal pin and the reference signal pin of described receiving terminal interface
Frequently signal pins and reference signal pin receive audio signal.
2. the system as claimed in claim 1, it is characterised in that
Described change-over terminal interface and receiving terminal interface are USB interface；
Described audio signal pin is in D+ and the D-pin of described change-over terminal interface and receiving terminal interface, described reference
Signal pins is another in D+ and the D-pin of described change-over terminal interface and receiving terminal interface.
3. system as claimed in claim 1 or 2, it is characterised in that
The audio interface of described audio signal switching device also comprises Mike's pin；The change-over terminal of described audio signal switching device
Interface also comprises ground wire pin；
Described Mike's pin is connected with the ground wire pin of described change-over terminal interface；
Described audio signal reception device also comprises: signal transmitting module；
Described signal transmitting module is connected with described reference signal pin, for the magnitude of voltage by changing described reference signal pin
Mode by described reference signal pin and described Mike's pin to audio signal dispensing device output signal.
4. system as claimed in claim 3, it is characterised in that
Described signal transmitting module is also connected with described audio signal pin, and when changing the magnitude of voltage of described reference signal pin,
The magnitude of voltage of described audio signal pin is changed with identical change amplitude.
5. system as claimed in claim 4, it is characterised in that
Described signal transmitting module is also connected with the ground wire pin of receiving terminal interface, and is changing the voltage of described reference signal pin
During value, the level of the ground wire pin of described receiving terminal interface is maintained at fixed voltage value set in advance.
6. the system as claimed in claim 1, it is characterised in that
Described audio frequency receiver module comprises: comparator；
The positive pole of described comparator is connected with audio signal pin and the reference signal pin of described receiving terminal interface respectively with negative pole,
The output pin of described comparator is for exporting the square wave corresponding with the audio signal of input；Or the positive pole of described comparator and negative
Pole is connected with reference signal pin and the audio signal pin of described receiving terminal interface respectively, and the output pin of described comparator is used for
Export the square wave corresponding with the audio signal of input.
7. the system as claimed in claim 1, it is characterised in that
The audio interface of described audio signal switching device comprises two audio frequency pins: left channel pin and R channel pin.
8. an audio signal switching device, comprises: audio interface, change-over terminal interface；It is characterized in that:
Described audio interface, for being connected with audio signal dispensing device, comprises: ground wire pin, and at least one audio frequency pin；
Described change-over terminal interface, for being connected with audio signal reception device, comprises: audio signal pin, reference signal pin；
The audio frequency pin of described audio interface is for receiving the audio signal of audio signal dispensing device output and terminating with described switching
The audio signal pin of mouth is connected, and the ground wire pin of described audio interface is connected with the reference signal pin of described change-over terminal interface；
Described audio signal pin and reference signal pin are for coupled audio signal reception device output audio signal.
9. audio signal switching device as claimed in claim 8, it is characterised in that
Described change-over terminal interface is USB interface；
Described audio signal pin is in D+ and the D-pin of described change-over terminal interface, and described reference signal pin is institute
State in D+ and the D-pin of change-over terminal interface another.
10. audio signal switching device as claimed in claim 8 or 9, it is characterised in that
Described audio interface also comprises Mike's pin；Described change-over terminal interface also comprises ground wire pin；
Described Mike's pin is connected with the ground wire pin of described change-over terminal interface.
11. audio signal switching devices as claimed in claim 8, it is characterised in that
Described audio interface comprises two audio frequency pins: left channel pin and R channel pin.
12. 1 kinds of audio signal reception devices, comprise: audio frequency receiver module；It is characterized in that, this device also comprises receiving terminal
Interface；
Described receiving terminal interface comprises: audio signal pin, reference signal pin；
Described audio frequency receiver module is connected, by described sound with audio signal pin and the reference signal pin of described receiving terminal interface
Frequently signal pins and reference signal pin receive audio signal, wherein, the audio frequency pin of audio interface, the audio frequency of change-over terminal interface
Signal pins, the audio signal pin of described receiving terminal interface, the audio signal pin of described audio frequency receiver module and reference signal
Pin, the reference signal pin of described receiving terminal interface, the reference signal pin of change-over terminal interface and the ground pin of audio interface
Composition loop.
13. audio signal reception devices as claimed in claim 12, it is characterised in that
Described receiving terminal interface is USB interface；
Described audio signal pin is in D+ and the D-pin of described receiving terminal interface, and described reference signal pin is institute
State in D+ and the D-pin of receiving terminal interface another.
The 14. audio signal reception devices as described in claim 12 or 13, it is characterised in that
Described audio signal reception device also comprises: signal transmitting module；
Described signal transmitting module is connected with described reference signal pin, for the magnitude of voltage by changing described reference signal pin
Mode by described reference signal pin and Mike's pin to audio signal dispensing device output signal.
15. audio signal reception devices as claimed in claim 14, it is characterised in that
Described signal transmitting module is also connected with described audio signal pin, and when changing the magnitude of voltage of described reference signal pin,
The magnitude of voltage of described audio signal pin is changed with identical change amplitude.
16. audio signal reception devices as claimed in claim 15, it is characterised in that
Described signal transmitting module is also connected with the ground wire pin of receiving terminal interface, and is changing the voltage of described reference signal pin
During value, the level of the ground wire pin of described receiving terminal interface is maintained at fixed voltage value set in advance.
17. audio signal reception devices as claimed in claim 12, it is characterised in that
Described audio frequency receiver module comprises: comparator；
The positive pole of described comparator with negative pole respectively D+ and D-pin with described receiving terminal interface be connected, described comparator defeated
Go out pin for exporting the square wave corresponding with the audio signal of input.
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| CN201310535150.8A CN103607210B (en) | 2011-06-15 | 2011-06-15 | A kind of audio signal switching and reception device, audio frequency signal transmission system |
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| CN201110161129.7A CN102201826B (en) | 2011-06-15 | 2011-06-15 | Audio signal switching and receiving device and audio signal transmission system |
| CN201310535150.8A CN103607210B (en) | 2011-06-15 | 2011-06-15 | A kind of audio signal switching and reception device, audio frequency signal transmission system |
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| CN201110161129.7A Division CN102201826B (en) | 2011-06-15 | 2011-06-15 | Audio signal switching and receiving device and audio signal transmission system |
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| CN103607210B true CN103607210B (en) | 2016-11-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207256A (en) * | 2006-12-20 | 2008-06-25 | 鸿富锦精密工业（深圳）有限公司 | Audio signal switching device |
| CN201594906U (en) * | 2010-03-22 | 2010-09-29 | 林木 | Vehicular audio control circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207256A (en) * | 2006-12-20 | 2008-06-25 | 鸿富锦精密工业（深圳）有限公司 | Audio signal switching device |
| CN201594906U (en) * | 2010-03-22 | 2010-09-29 | 林木 | Vehicular audio control circuit |
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