CN206961115U - USB multiplexers - Google Patents
USB multiplexers Download PDFInfo
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- CN206961115U CN206961115U CN201720847392.4U CN201720847392U CN206961115U CN 206961115 U CN206961115 U CN 206961115U CN 201720847392 U CN201720847392 U CN 201720847392U CN 206961115 U CN206961115 U CN 206961115U
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Abstract
The utility model discloses a kind of USB multiplexers, including USB interface, and it includes first kind pin and the second class pin；Switch unit, its input are connected with the second class pin, and input of its output end respectively with the input and audio treatment unit of data processing and control unit is connected, and its control terminal is connected with the control terminal of data processing and control unit；Data processing and control unit, its input is connected with first kind pin, its control terminal and the control terminal of switch unit connect, for when the type for detecting input equipment is the equipment of integrated a camera and multichannel microphone, controlling the output end of switch unit and the input of audio treatment unit to connect；Audio treatment unit, for handling the audio signal of input equipment.USB multiplexers solve the problems, such as that USB interface is second-rate for audio signal sample by setting data processing and control unit to control switch unit to be connected to data processing and control unit or audio treatment unit in the utility model.
Description
Technical field
Electronic technology field is the utility model is related to, more particularly to a kind of USB multiplexers.
Background technology
With the development of electronic technology, electronic equipment develops towards miniaturization, lighting and diversified direction, and electronics is set
Standby to integrate increasing function, its port can also realize a variety of multiplexing functions, for example, needing multiple interfaces in the past with reality
The collection of existing image and audio, with the development of electronic technology, the USB interface camera of present production firm's production can be realized
The collection of image and audio.
The collection of Voice ＆ Video is realized by using USB 2.0Camera Controller in the prior art, still
The interfaces of USB 2.0 only support the input of microphone all the way, thus cause the second-rate of audio collection, do not reach preferable audio
Treatment effect.
Utility model content
Based on this, the purpose of this utility model is to propose a kind of USB multiplexers, solves USB interface and believes for audio
The problem of number acquisition quality is poor.
The utility model provides a kind of USB multiplexers, and concrete technical scheme is as follows：
The utility model provides a kind of USB multiplexers, including USB interface, the USB interface include first kind pin and
Second class pin, the USB multiplexers also include：
Switch unit, its input are connected with the second class pin, and its output end is single with data processing and control respectively
The input of member connects with the input of audio treatment unit, its control terminal and the data processing and the control terminal of control unit
Connection；
The data processing and control unit, its input are connected with the first kind pin, and its control terminal is cut with described
Change unit control terminal connection, for switch unit described in the Type Control according to input equipment output end with the audio
The connection of processing unit and switched between the data processing and the connection of control unit, wherein, it is described when detecting
When the device type of input equipment is the equipment of integrated a camera and multichannel microphone, the output end of the switch unit is controlled
Switch to and be connected with the input of the audio treatment unit；
The audio treatment unit, for handling the audio signal of the input equipment.
USB multiplexers provided by the utility model, the type of input equipment is detected by data processing and control unit
And the output end of switch unit is controlled in the connection with audio treatment unit and data processing and control by sending control signal
Switched between connection between unit, when the audio-video collection that input equipment is integrated a camera and multichannel microphone is set
It is standby, control the output end of switch unit to switch to and connected with audio treatment unit, multichannel Mike is handled by audio treatment unit
The vision signal of the audio signal of elegance collection, data processing and control unit processing camera collection, now due to the audio frequency and video
Collecting device includes multichannel microphone, therefore the audio signal that the audio signal gathered gather compared with microphone all the way is more preferably, solution
In the prior art USB interface for audio signal sample it is second-rate the problem of.
In addition, according to USB multiplexers provided by the utility model, there can also be technical characteristic additional as follows：
Further, the first kind pin include first voltage pin, the first data pin, the second data pin and
First grounding pin.
Further, the second class pin includes the 3rd data pin, the 4th data pin, the second grounding pin, the
Five data pins and the 6th data pin.
Further, the input of the audio treatment unit includes the first differential signal input pin, the second difference is believed
Number input pin, the 3rd differential signal input pin and the 4th differential signal input pin, the first differential signal input are drawn
Pin, the second differential signal input pin, the 3rd differential signal input pin and the 4th differential signal input pin respectively with it is described
The output end connection of switch unit.
Further, the input of the audio treatment unit includes the first signal input pin, the 3rd grounding pin, the
Binary signal input pin and the 4th grounding pin, the first signal input pin, the 3rd grounding pin, secondary signal input are drawn
The output end of pin and the 4th grounding pin respectively with the switch unit is connected.
Further, the input of the audio treatment unit includes the first signal input pin, secondary signal input is drawn
Pin, the 3rd signal input pin and the 4th signal input pin, the first signal input pin, secondary signal input pin,
The output end of 3rd signal input pin and the 4th signal input pin respectively with the switch unit is connected.
Further, the switch unit is multichannel single pole double throw analog switch or USB switch.
Further, the data processing and control unit are single-chip microcomputer or PLD.
Brief description of the drawings
Fig. 1 is the circuit diagram for the USB multiplexers that the utility model first embodiment proposes.
Fig. 2 is the circuit diagram for the USB multiplexers that the utility model second embodiment proposes.
Fig. 3 is the circuit diagram for the USB multiplexers that the utility model 3rd embodiment proposes.
Embodiment
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings to this
The embodiment of utility model is described in detail.Elaborate many details in order to abundant in the following description
Understand the utility model.But the utility model can be to be much different from other manner described here to implement, this area
Technical staff can do similar improvement in the case of without prejudice to the utility model connotation, therefore the utility model is not by following public affairs
The limitation for the specific implementation opened.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the utility model.Term as used herein " and/or " include one or more related Listed Items
Arbitrary and all combination.
Referring to Fig. 1, the USB multiplexers 10 that first embodiment of the present utility model provides include usb 11, switching
Unit 12, data processing and control unit 13 and audio treatment unit 14.
Usb 11 is the USB interface using 3.0 and above specification, and it can be USB 3.0 or USB3.1.According to connecing
Mouth type can be divided into Type-A, Type-B and Type-C interface, and wherein USBType-A and Type-B interfaces are drawn using 9
Pin, USB Type-C interfaces respectively use 12 pins up and down.In the present embodiment, usb 11 uses Type-A interfaces, and it is divided into
Two class pins, i.e. first kind pin and the second class pin, wherein first kind pin are all the drawing for including the interface specifications of USB 2.0
Pin, it includes first voltage pin (VBUS), the first data pin (DM), the second data pin (DP) and the first grounding pin
(GND).For second class pin to be included in increased 5 pins in the interface basis of USB 2.0, it includes the 3rd data pin
(RX-), the 4th data pin (RX+), the second grounding pin (GND_DRAIN), the 5th data pin (TX-) and the 6th data
Pin (TX+), it should be pointed out that usb 11 is backward compatible USB 1.0 and USB 2.0, when the access of usb 11 is adopted
During with the input equipments of the interfaces of USB 2.0, it need to only pass through the transmission that first kind pin carries out data.
Switch unit 12 divides for the input and USB interface of input, output end and control terminal, wherein switch unit 12
11 the second class pin connection；The output end of switch unit 12 respectively with data processing and the input and audio of control unit 13
The input connection of processing unit 14, wherein in default situations, switch unit 12 and data processing and control unit 13 it is defeated
Enter end connection；The control terminal 121 of switch unit 12 is connected with the control terminal 131 of data processing and control unit 13, is connect for working as
When receiving the control signal that data processing and control unit 13 are sent, the output end and Audio Signal Processing of switch unit 12 are controlled
Unit 14 connects.Wherein the input of switch unit 12 sequentially corresponds to and the 3rd data pin (RX-) of USB interface, the respectively
Four data pins (RX+), the second grounding pin (GND_DRAIN), the 5th data pin (TX-) and the 6th data pin (TX+)
Connection；Switch unit 12 is multichannel single pole double throw analog switch or USB switch (USB Switch), is switched in the present embodiment single
Member 12 is specially USB switch, for switching its output end and data processing and control according to the control signal of its control terminal 131
Connection between unit 13 or audio treatment unit 14.
Data processing and control unit 13 are divided for input, output end and control terminal, wherein data processing and control list
The input of member 13 is connected with the first kind pin of usb 11 and the second class pin respectively；Data processing and control unit 13
Control terminal 131 be connected with the control terminal 121 of switch unit 12, for the Type Control switch unit 12 according to input equipment
Output end switches in the connection of audio treatment unit 14 and between data processing and the connection of control unit 13, wherein
Data processing and control unit 13 are single-chip microcomputer or PLD, for the first kind pin to USB interface and/or
The signal of two class pins transmission carries out data processing.
Further, data processing and control unit 13 include device type detection unit 132 and control unit 133, its
Middle device type detection unit 132 is used for the device type for detecting input equipment, and control unit 133 is used for when determination device type
When the device type that detection unit 132 detects is the equipment of integrated a camera and multichannel microphone, send a control signal to
Switch unit 12, it is connected with controlling the output end of switch unit 12 to switch to the input of audio treatment unit 14, if not
Timing, the output end of switch unit 12 are connected with the input of data processing and control unit 13, the now transmission of input equipment
Data all carry out data processing by data and control unit 13.
It is pointed out that audio signal has two kinds of transmission means, the respectively transmission of balanced type signal and unbalanced letter
Number transmission, the wherein input of audio frequency apparatus of balanced type signal transmission, output port use three lines, wherein one for passing
Defeated positive half-wave (positive) signal, one be used to transmit negative half-wave (reverse) signal and last root for being grounded, two of which
The signal amplitude of transmission is equal, opposite in phase, by the principle of phase cancellation by suffered other during audio signal transmission
Interference minimizes.Wherein the audio frequency apparatus input of unbalanced signal transmission, output port typically use both threads, wherein one
Root is used for transmission signal and another is used to be grounded.
USB multiplexers 10 are used to the input equipment of access is carried out data transmission handling, wherein, in the present embodiment, when
Input equipment is the audio-video acquisition equipment of integrated a camera and two-way microphone, and microphone uses two differential signals
Line is balanced the transmission of formula signal.When the input equipment is linked into usb 11, device type detection unit 132 identifies defeated
Enter the manufacturer ID (VID) and product IDs (PID) of equipment, when control unit 133 judge the manufacturer ID and product IDs with it is pre-
When the manufacturer ID deposited is identical with product IDs, switch unit 12 is sent a control signal to, switch unit 12 receives control unit
After 133 control signals sent, the output end of control switch unit 12 connects with audio treatment unit 14.Wherein input equipment
The vision signal of camera collection enters line number by the first data pin (DM) and the second data pin (DP) of first kind pin
According to transmission, the audio signal of microphone collection is connected by input of the switch unit 12 respectively with audio treatment unit 14.Its
The input of sound intermediate frequency processing unit 14 is made up of difference channel, and for handling the audio signal of Differential Input, it includes first
Differential signal input pin (LINE RIN-), the second differential signal input pin (LINE RIN+), the input of the 3rd differential signal
Pin (LINE LIN-) and the 4th differential signal input pin (LINE LIN+), switch unit 12 are respectively turned on usb 11
The 3rd data pin (RX-), the 4th data pin (RX+), the 5th data pin (TX-) and the 6th data pin (TX+) with
The first differential signal input pin (LINE RIN-), the second differential signal input pin (the LINE RIN of audio treatment unit 14
+), the connection of the 3rd differential signal input pin (LINE LIN-) and the 4th differential signal input pin (LINE LIN+),
Two differential signals of one microphone and second microphone are connected by the second class pin of usb 11 with audio treatment unit 14
Connect, signal transacting is carried out to two-way audio signal finally by audio treatment unit 14.
The USB multiplexers 10 of the present embodiment are by setting switch unit 12 and data processing and control unit 13, when defeated
It is audio-video acquisition equipment to enter equipment, and data processing and control unit 13 detect and judge input equipment manufacturer ID and
When product IDs are with the manufacturer ID and identical product IDs to prestore, the output end of control switch unit 12 switches to and audio frequency process list
Member 14 is connected, and two-way audio signal is handled by audio treatment unit 14, and vision signal is by data processing and control unit 13
Reason, when input equipment is not the audio-video acquisition equipment, signal transmission is all carried out by data processing and control unit 13
Reason is completed, and is no different with prior art USB interface, the present embodiment is realized by switch unit 12 and data processing and control unit 13
The multiplexing of usb 11.
Fig. 2 is refer to, the USB multiplexers 10a provided for second embodiment of the present utility model circuit diagram, its
Second embodiment is essentially identical with first embodiment, and difference is, in the present embodiment, the two-way microphone in input equipment
Audio signal transmission is carried out by the way of a signal wire and a ground wire, now audio treatment unit 14a input
It is made up of common-mode circuit, for handling the audio signal of single ended input.Audio treatment unit 14a input includes the first signal
Input pin (LINE IN1), the 3rd grounding pin (GND), secondary signal input pin (LINE IN2) and the 4th grounding pin
(GND), switch unit 12a is respectively turned on usb 1 1a the 3rd data pin (RX-), the 4th data pin (RX+), the 5th
Data pin (TX-) and the 6th data pin (TX+) and audio treatment unit 14a the first signal input pin (LINE
IN1), the connection of the 3rd grounding pin (GND), secondary signal input pin (LINE IN2) and the 4th grounding pin (GND), the
The the second class pin and audio treatment unit 14a that two single-ended signals of one microphone and second microphone pass through usb 1 1a
Connection, signal transacting is carried out to two-way audio signal finally by audio treatment unit 14a.
Fig. 3 is refer to, the USB multiplexers 10b provided for 3rd embodiment of the present utility model circuit diagram, its
3rd embodiment is essentially identical with second embodiment, and difference is, in the present embodiment, input equipment is an integrated camera
With the audio-video acquisition equipment of No. four microphones, wherein microphone carries out sound by the way of a signal wire and a ground wire
Frequency signal transmits, and its audio treatment unit 14b includes the first signal input pin (LINE IN1), secondary signal input pin
(LINE IN2), the 3rd signal input pin (LINE IN3) and the 4th signal input pin (LINE IN4), wherein switching is single
First 12b is respectively turned on usb 1 1b the 3rd data pin (RX-), the 4th data pin (RX+), the 5th data pin
And the 6th data pin (TX+) and audio treatment unit 14b the first signal input pin (LINEIN1), secondary signal (TX-)
The company of input pin (LINE IN2), the 3rd signal input pin (LINE IN3) and the 4th signal input pin (LINE IN4)
Connect, the single-ended signal of No. four microphones is connected by usb 1 1b the second class pin with audio treatment unit 14b, is finally led to
Cross audio treatment unit 14b and signal transacting is carried out to four tunnel audio signals of transmission.
It should be appreciated that each several part of the present utility model can be realized with hardware, software, firmware or combinations thereof.
In above-mentioned embodiment, the software or firmware that can be performed in memory and by suitable instruction execution system with storage are come real
It is existing.If, and in another embodiment, can be with following technology well known in the art for example, realized with hardware
Any one or their combination are realized：Discrete logic with the logic gates for realizing logic function to data-signal
Circuit, there is the application specific integrated circuit of suitable combinational logic gate circuit, programmable gate array (PGA), field-programmable gate array
Arrange (FPGA) etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore it can not be interpreted as the limitation to the utility model patent scope.It should be pointed out that for the common of this area
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (8)
1. a kind of USB multiplexers, including USB interface, the USB interface includes first kind pin and the second class pin, and it is special
Sign is, in addition to：
Switch unit, its input are connected with the second class pin, its output end respectively with data processing and control unit
Input connects with the input of audio treatment unit, and its control terminal connects with the control terminal of the data processing and control unit
Connect；
The data processing and control unit, its input are connected with the first kind pin, and its control terminal and the switching are single
Member control terminal connection, for switch unit described in the Type Control according to input equipment output end with the audio frequency process
The connection of unit and switched between the data processing and the connection of control unit, wherein, when detecting the input
When the device type of equipment is the equipment of integrated a camera and multichannel microphone, the output end of the switch unit is controlled to switch
Extremely it is connected with the input of the audio treatment unit；
The audio treatment unit, for handling the audio signal of the input equipment.
2. USB multiplexers according to claim 1, it is characterised in that the first kind pin draws including first voltage
Pin, the first data pin, the second data pin and the first grounding pin.
3. USB multiplexers according to claim 1, it is characterised in that the second class pin draws including the 3rd data
Pin, the 4th data pin, the second grounding pin, the 5th data pin and the 6th data pin.
4. USB multiplexers according to claim 1, it is characterised in that the input of the audio treatment unit includes
First differential signal input pin, the second differential signal input pin, the 3rd differential signal input pin and the 4th differential signal
Input pin, the first differential signal input pin, the second differential signal input pin, the 3rd differential signal input pin and
Output end of the 4th differential signal input pin respectively with the switch unit is connected.
5. USB multiplexers according to claim 1, it is characterised in that the input of the audio treatment unit includes
First signal input pin, the 3rd grounding pin, secondary signal input pin and the 4th grounding pin, the first signal input
Pin, the 3rd grounding pin, secondary signal input pin and the 4th grounding pin connect with the output end of the switch unit respectively
Connect.
6. USB multiplexers according to claim 1, it is characterised in that the input of the audio treatment unit includes
First signal input pin, secondary signal input pin, the 3rd signal input pin and the 4th signal input pin, described first
Signal input pin, secondary signal input pin, the 3rd signal input pin and the 4th signal input pin are cut with described respectively
Change the output end connection of unit.
7. USB multiplexers according to claim 1, it is characterised in that the switch unit is multichannel single-pole double throw mould
Intend switch or USB switch.
8. USB multiplexers according to claim 1, it is characterised in that the data processing and control unit are monolithic
Machine or PLD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720847392.4U CN206961115U (en) | 2017-07-12 | 2017-07-12 | USB multiplexers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720847392.4U CN206961115U (en) | 2017-07-12 | 2017-07-12 | USB multiplexers |
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| Publication Number | Publication Date |
|---|---|
| CN206961115U true CN206961115U (en) | 2018-02-02 |
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|---|---|---|---|
| CN201720847392.4U Active CN206961115U (en) | 2017-07-12 | 2017-07-12 | USB multiplexers |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108874713A (en) * | 2018-05-31 | 2018-11-23 | 联想(北京)有限公司 | A kind of information processing method and device |
| CN111124134A (en) * | 2019-12-30 | 2020-05-08 | 歌尔科技有限公司 | Data transmission method and device of head-mounted display equipment and head-mounted display equipment |
| CN113206681A (en) * | 2021-04-26 | 2021-08-03 | Oppo广东移动通信有限公司 | Network device |
-
2017
- 2017-07-12 CN CN201720847392.4U patent/CN206961115U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108874713A (en) * | 2018-05-31 | 2018-11-23 | 联想(北京)有限公司 | A kind of information processing method and device |
| CN108874713B (en) * | 2018-05-31 | 2021-10-22 | 联想(北京)有限公司 | Information processing method and device |
| CN111124134A (en) * | 2019-12-30 | 2020-05-08 | 歌尔科技有限公司 | Data transmission method and device of head-mounted display equipment and head-mounted display equipment |
| CN113206681A (en) * | 2021-04-26 | 2021-08-03 | Oppo广东移动通信有限公司 | Network device |
| CN113206681B (en) * | 2021-04-26 | 2022-07-08 | Oppo广东移动通信有限公司 | Network device |
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