CN207995291U - Set-top box and its interface multiplexing circuit - Google Patents
Set-top box and its interface multiplexing circuit Download PDFInfo
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- CN207995291U CN207995291U CN201820307215.1U CN201820307215U CN207995291U CN 207995291 U CN207995291 U CN 207995291U CN 201820307215 U CN201820307215 U CN 201820307215U CN 207995291 U CN207995291 U CN 207995291U
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Abstract
The utility model discloses a kind of set-top box and its interface multiplexing circuits, the circuit includes for connecting the compatibility interface of external plug, video/audio wire responding to switch and signal processing module, the compatibility interface includes the first pin, second pin, third pin and the 4th pin, the third pin ground connection, 4th pin is used to connect the left channel audio signal connecting pin of video/audio wire, first pin and second pin connection signal processing module；Something incosiderate is touched in the position of the video/audio wire responding to switch in the accessible and infrared extended line of headset plug video/audio wire；Signal processing module is used to detect the on off operating mode of video/audio wire responding to switch, and so that compatibility interface is enabled for infrared extension interface or audio-video interface according to the on off operating mode of video/audio wire responding to switch.The utility model utilizes simple mechanical switch or touch-switch, by audio-video interface and infrared extension Interface integration to a jack interface, realizes two kinds of different function.
Description
Technical field
The utility model is related to field of set-top, more particularly to a kind of set-top box and its interface multiplexing circuit.
Background technology
With the development of technology, realize that interface compatibility function becomes more and more important, such as Iphone Lightning interfaces
Not only it can realize charging, but also can realize the functions such as earphone music.The Intelligent set top box function of existing market is more and more so that
The interface of set-top box is also more and more with the enhancing of function.It is empty for PCB is saved since set-top box dimensional structure is very limited
Between, customer requirement, prevent the reasons such as user's wrong plug, set-top box manufacturer can simplify terminal as possible when dispatching from the factory, and only retain required end
Sub- shipment is therefore.
Set-top box at present（Including DTV STB/ipTV/OTT）In interface, it all includes earpiece type sound to generally comprise
Video interface and infrared extension interface, and institute all meets 3.5mm earphone interface dimensional standards using interface parameters, realizes on machine top
Box（Including DTV STB/ipTV/OTT）When exporting audio and video picture using HDMI, the audio and video earphone that would sit idle for is defeated
Outgoing interface is used as infrared extension interface, it is possible to reduce cost, and also it is user-friendly.
Thus the prior art could be improved and improve.
Utility model content
Place in view of above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a kind of set-top box and its interfaces
Multiplex circuit can realize function of infrared remote control and audio and video output function by single face, user-friendly.
In order to achieve the above object, the utility model takes following technical scheme：
A kind of interface multiplexing circuit of set-top box, including：
Compatibility interface for connecting external plug, the compatibility interface include the first pin, second pin, third pin
With the 4th pin, the third pin ground connection, the 4th pin is used to connect the left channel audio signal connection of video/audio wire
End, first pin and second pin connection signal processing module, wherein the external plug includes video/audio wire or infrared
Extended line；
The video/audio wire responding to switch for being arranged inside the compatibility interface and being connect with signal processing module, the sound regard
Something incosiderate is touched in the position of frequency line responding to switch in the accessible and infrared extended line of headset plug video/audio wire；
On off operating mode for detecting video/audio wire responding to switch, and made according to the on off operating mode of video/audio wire responding to switch
Compatibility interface enables the signal processing module for infrared extension interface or audio-video interface.
In the interface multiplexing circuit of the set-top box, the video/audio wire responding to switch is mechanical switch or touches out
It closes.
In the interface multiplexing circuit of the set-top box, the letter processing module member includes first resistor, second resistance,
Three resistance, the 4th resistance, the 5th resistance, the first capacitance, the second capacitance, third capacitance and control chip, the first resistor
One end connects one end of video/audio wire responding to switch, and the other end of the video/audio wire responding to switch connects 3.3V power supplys, described
The ends S0 of one end and control chip of the other end connection second resistance of first resistor, the other end ground connection of the second resistance,
The ends S1 of the control chip are grounded by 3rd resistor, the control chipEnd passes through the 4th resistance eutral grounding, the control
The ends 1Y0 and the ends 1Y1 of coremaking piece are all connected with the first pin of compatibility interface, and the ends 2Y0 of the control chip connect compatibility interface
Second pin, also by the second capacity earth, the second pin of the ends the 2Y1 connection compatibility interface of the control chip is also led to
The first capacity earth is crossed, the ends VCC of the control chip connect 5V power supplys, also by third capacity earth, the control chip
The ends GND and the ends VEE be grounded, the ends the 1Z output vision signal or IR signals of the control chip, the 2Z of the control chip
End exports right channel audio signal or IR_+5V power supply signals by the 5th resistance.
In the interface multiplexing circuit of the set-top box, the model MC74LVXT4052 of the control chip.
A kind of set-top box includes the interface multiplexing circuit of set-top box as described above.
Compared to the prior art, set-top box and its interface multiplexing circuit provided by the utility model, the circuit include using
In the compatibility interface, video/audio wire responding to switch and the signal processing module that connect external plug, the compatibility interface includes first
Pin, second pin, third pin and the 4th pin, the third pin ground connection, the 4th pin is for connecting audio and video
The left channel audio signal connecting pin of line, first pin and second pin connection signal processing module；The video/audio wire
Something incosiderate is touched in the position of responding to switch in the accessible and infrared extended line of headset plug video/audio wire；Signal processing module
On off operating mode for detecting video/audio wire responding to switch, and compatibility interface is made according to the on off operating mode of video/audio wire responding to switch
It enables as infrared extension interface or audio-video interface.The utility model is using electronic component and simple mechanical switch or touches
Switch, its function is realized by earpiece type audio-video interface with infrared extension Interface integration to a phone jack receptacle：It is inserted into red
When outer extended line, function of infrared remote control is realized；When being inserted into video/audio wire, realizes audio and video output, realize set top box interface
Multiplexing.
Description of the drawings
Fig. 1 is the schematic diagram of the signal processing module in the interface multiplexing circuit of set-top box provided by the utility model.
Fig. 2 is the flow chart of the method for multiplexing interface of set-top box provided by the utility model.
Specific implementation mode
A kind of set-top box of the utility model offer and its interface multiplexing circuit, to make the purpose of this utility model, technical side
Case and effect are clearer, clear, and the utility model is further described in the embodiment that develops simultaneously referring to the drawings.It should manage
Solution, specific embodiment described herein only to explain the utility model, are not used to limit the utility model.
Referring to Fig. 1, the interface multiplexing circuit of set-top box provided by the utility model includes compatibility interface, video/audio wire sound
Inductive switch and signal processing module.
Wherein, the compatibility interface is for connecting external plug, the compatibility interface include the first pin, second pin,
Third pin and the 4th pin, the third pin ground connection, the 4th pin are used to connect the left channel audio of video/audio wire
Signal connection end, first pin and second pin connection signal processing module, wherein the external plug includes audio and video
Line or infrared extended line.
The video/audio wire responding to switch is arranged inside the compatibility interface and is connect with signal processing module, the sound
Something incosiderate is touched in the position of video line responding to switch in the accessible and infrared extended line of headset plug video/audio wire.
The signal processing module is used to detect the on off operating mode of video/audio wire responding to switch, and is responded according to video/audio wire
The state of switching on-off makes compatibility interface enable for infrared extension interface or audio-video interface.
Specifically, the utility model is improved by the circuit to existing video/audio wire, it is made to be regarded in realization sound
While the function of the port of frequency line, the function of the port of infrared extended line can also be achieved.Since earphone video/audio wire includes four
Section：Left channel audio signal end, right channel audio signal end, vision signal end and ground terminal；Infrared extension interface includes three sections：
VCC (2.7V~5.5V) is held, IR signal ends and ground terminal, so one section had more than infrared extended line by using video/audio wire
Stroke can realize the multiplexing of interface, when it is implemented, when external plug is inserted into compatibility interface, due to video/audio wire responding to switch
Position touch something incosiderate in the accessible and infrared extended line of headset plug video/audio wire, so can be more by video/audio wire
The break-make of a trip control video/audio wire responding to switch gone out, further such that signal processing module is responded according to video/audio wire
The state of switching on-off makes compatibility interface enable for infrared extension interface or audio-video interface, in the present embodiment, in the outer of insertion
Set plug be infrared extended line when, the video/audio wire responding to switch is not triggered, and tends to remain on, the signal processing mould
Block makes compatibility interface enable for infrared extension interface；When the external plug of insertion is video/audio wire, the video/audio wire response
Switch is triggered, and goes off state, and the signal processing module makes compatibility interface enable for audio-video interface.
The utility model is using electronic component and simple mechanical switch or touch-switch, by earpiece type audio-video interface
With infrared extension Interface integration its function is realized to a phone jack receptacle：When being inserted into infrared extended line, infrared remote control is realized
Function；When being inserted into video/audio wire, realizes audio and video output, realize the multiplexing of set top box interface.
In further embodiment, the video/audio wire responding to switch is mechanical switch or touch-switch, ensures audio and video
When being inserted into compatibility interface, the video/audio wire responding to switch can be triggered line.
Please continue to refer to Fig. 1, the first pin of the signal processing module connection compatibility interface, second pin, audio and video
Line responding to switch SW1, the signal processing module are used to detect the on off operating mode of video/audio wire responding to switch SW1, and according to sound
The on off operating mode of video line responding to switch SW1 exports different signals, realizes infrared remote control output function or audio and video output work
Energy.
Specifically, the signal processing module includes first resistor R1, second resistance R2,3rd resistor R3, the 4th electricity
R4, the 5th resistance R5, the first capacitance C1, the second capacitance C2, third capacitance C3 and control chip U1 are hindered, the first resistor R1's
One end connects one end of video/audio wire responding to switch SW1, the other end connection 3.3V electricity of the video/audio wire responding to switch SW1
Source, the ends S0 of one end and control chip U1 of the other end connection second resistance R2 of the first resistor R1, the second resistance
The other end of R2 is grounded, and the ends S1 of the control chip U1 are grounded by 3rd resistor R3, the control chip U1'sEnd is logical
The 4th resistance R4 ground connection is crossed, the ends 1Y0 and the ends 1Y1 of the control chip U1 are all connected with the first pin of compatibility interface, the control
The second pin of the ends the 2Y0 connection compatibility interface of coremaking piece U1 is grounded also by the second capacitance C2, the control chip U1's
The ends 2Y1 connect the second pin of compatibility interface, also by the first capacitance C1 ground connection, and the ends VCC of the control chip U1 connect 5V
Power supply is grounded also by third capacitance C3, and the ends GND and the ends VEE of the control chip U1 are grounded, the control chip U1's
The ends 1Z export vision signal or IR signals, and the ends 2Z of the control chip U1 export right channel audio signal by the 5th resistance R5
Or IR_+5V power supply signals.
In the present embodiment, the control chip U1 uses similar 4052 digital control analog switch chips or other elements,
In preferred embodiment, the model MC74LVXT4052 of the control chip U1,4052 chips are with low conduction impedance and very
Low cut-off leakage current can control analog signal switching for digital signal, certainly in other embodiments, it also can be used
It is not construed as limiting this similar to 4052 digital control analog switch chips or other elements, the utility model, if control chip U1
'sWhen end is high level, all channel cut-offs.Two binary input signals gate the channel in 4 pairs of channels, can connect
This is input to output.
Furthermore, it is understood that control chip U1End and the ends S1 are defaulted as low level, i.e.,=0, S1=0, control chip U1
The ends S0 low level or high level are exported according to the on off operating mode of video/audio wire responding to switch SW1, when it is implemented, in audio and video
When line responding to switch SW1 is conducting state, the ends S0 of the control chip U1 are high level, in video/audio wire responding to switch SW1
For off-state when, the ends S0 of the control chip U1 are low level.When=0, S1=0（Low level）, S0=1（High level）When,
Compatibility interface enables as infrared extension interface, and the ends the 1Y1 input IR signals for controlling chip U1 simultaneously pass through the ends 1Z for controlling chip U1
Output, the ends the 2Y1 input IR_+5V power supply signals of control chip U1 and the ends the 2Z output by controlling chip U1；When=0, S1=
0（Low level）, S0=0（Low level）When, compatibility interface enables as audio-video interface, the ends the 1Y0 input video letter of control chip U1
Number and the ends 1Z by controlling chip U1 export, the ends the 2Y0 input right channel audio signal of control chip U1, which simultaneously passes through, controls core
The ends 2Z of piece U1 export, and output signal is switched to audio-video signal output from infrared extension function.
The utility model is by the way that when video/audio wire headset plug is inserted into earphone socket, trigger switch break-make realizes control
Level height is converted, and output signal automatically switches to the signal for needing to switch.
Based on the interface multiplexing circuit of above-mentioned set-top box, the utility model also correspondingly provides a kind of using as described above
The method for multiplexing interface for the set-top box that the interface multiplexing circuit of set-top box is realized, includes the following steps：
S100, when video/audio wire or infrared extended line are inserted into compatibility interface, signal processing module detects video/audio wire and rings
The on off operating mode of inductive switch；
It is red that S200, signal processing module make compatibility interface enable according to the on off operating mode of the video/audio wire responding to switch
Outer extension interface or audio-video interface.
Wherein, the step S200 is specifically included：
When it is conducting state to detect video/audio wire responding to switch, the ends S0 for controlling chip are high level, control chip
The ends 1Y1 input IR signals and the ends 1Z by controlling chip export, control the ends the 2Y1 input IR_+5V power supply signals of chip simultaneously
By controlling the ends the 2Z output of chip, compatibility interface enables as infrared extension interface；
When it is off-state to detect video/audio wire responding to switch, the ends S0 for controlling chip are low level, control chip
The ends 1Y0 incoming video signal and by control chip the ends 1Z export, control chip the ends 2Y0 input right channel audio signal
And the ends 2Z by controlling chip export, compatibility interface enables as audio-video interface.
Since the interface multiplexing circuit of set-top box being described in detail above, details are not described herein.
Based on the interface multiplexing circuit of above-mentioned set-top box, the utility model also correspondingly provides a kind of set-top box, including such as
The interface multiplexing circuit of the upper set-top box, since the interface multiplexing circuit of set-top box being described in detail above,
This is repeated no more.
In conclusion set-top box provided by the utility model and its interface multiplexing circuit, the circuit includes for connecting
Compatibility interface, video/audio wire responding to switch and the signal processing module of external plug, the compatibility interface include the first pin, the
Two pins, third pin and the 4th pin, the third pin ground connection, the 4th pin are used to connect the left sound of video/audio wire
Audio channel signal connecting pin, first pin and second pin connection signal processing module；The video/audio wire responding to switch
Position touch something incosiderate in the accessible and infrared extended line of headset plug video/audio wire；Signal processing module is for detecting
The on off operating mode of video/audio wire responding to switch, and it is red so that compatibility interface is enabled according to the on off operating mode of video/audio wire responding to switch
Outer extension interface or audio-video interface.The utility model, will using electronic component and simple mechanical switch or touch-switch
Earpiece type audio-video interface realizes its function with infrared extension Interface integration to a phone jack receptacle：It is inserted into infrared extended line
When, realize function of infrared remote control；When being inserted into video/audio wire, realizes audio and video output, realize the multiplexing of set top box interface.
It is understood that for those of ordinary skills, can with technical solution according to the present utility model and
The design of its utility model is subject to equivalent substitution or change, and all these changes or replacement should all belong to appended by the utility model
Scope of the claims.
Claims (5)
1. a kind of interface multiplexing circuit of set-top box, which is characterized in that including：
Compatibility interface for connecting external plug, the compatibility interface include the first pin, second pin, third pin and the
Four pins, the third pin ground connection, the 4th pin are used to connect the left channel audio signal connecting pin of video/audio wire, institute
State the first pin and second pin connection signal processing module, wherein the external plug includes video/audio wire or infrared extension
Line；
The video/audio wire responding to switch for being arranged inside the compatibility interface and being connect with signal processing module, the video/audio wire
Something incosiderate is touched in the position of responding to switch in the accessible and infrared extended line of headset plug video/audio wire；
On off operating mode for detecting video/audio wire responding to switch, and compatibility is made according to the on off operating mode of video/audio wire responding to switch
Interface enables the signal processing module for infrared extension interface or audio-video interface.
2. the interface multiplexing circuit of set-top box according to claim 1, which is characterized in that the video/audio wire responding to switch
For mechanical switch or touch-switch.
3. the interface multiplexing circuit of set-top box according to claim 2, which is characterized in that the signal processing module includes
First resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the first capacitance, the second capacitance, third capacitance and control
Chip, the first resistor one end connection video/audio wire responding to switch one end, the video/audio wire responding to switch it is another
End connection 3.3V power supplys, the ends S0 of one end and control chip of the other end connection second resistance of the first resistor, described the
The other end of two resistance is grounded, and the ends S1 of the control chip are grounded by 3rd resistor, the control chipEnd passes through
4th resistance eutral grounding, the ends 1Y0 and the ends 1Y1 of the control chip are all connected with the first pin of compatibility interface, the control chip
The ends 2Y0 connection compatibility interface second pin, also by the second capacity earth, the ends the 2Y1 connection compatibility of the control chip
The second pin of interface, also by the first capacity earth, the ends VCC connection 5V power supplys of the control chip, also by third electricity
Hold ground connection, the ends GND and the ends VEE of the control chip are grounded, the ends the 1Z output vision signal or IR letters of the control chip
Number, the ends 2Z of the control chip export right channel audio signal or IR_+5V power supply signals by the 5th resistance.
4. the interface multiplexing circuit of set-top box according to claim 3, which is characterized in that the model of the control chip
MC74LVXT4052。
5. a kind of set-top box, which is characterized in that include the interface duplex electricity of the set-top box as described in claim 1-4 any one
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820307215.1U CN207995291U (en) | 2018-03-06 | 2018-03-06 | Set-top box and its interface multiplexing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820307215.1U CN207995291U (en) | 2018-03-06 | 2018-03-06 | Set-top box and its interface multiplexing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207995291U true CN207995291U (en) | 2018-10-19 |
Family
ID=63825327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820307215.1U Expired - Fee Related CN207995291U (en) | 2018-03-06 | 2018-03-06 | Set-top box and its interface multiplexing circuit |
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| Country | Link |
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| CN (1) | CN207995291U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108259953A (en) * | 2018-03-06 | 2018-07-06 | 深圳康佳信息网络有限公司 | Interface multiplexing circuit, method for multiplexing interface and the set-top box of set-top box |
-
2018
- 2018-03-06 CN CN201820307215.1U patent/CN207995291U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108259953A (en) * | 2018-03-06 | 2018-07-06 | 深圳康佳信息网络有限公司 | Interface multiplexing circuit, method for multiplexing interface and the set-top box of set-top box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181019 Termination date: 20210306 |