CN115037899A - Automatic detection type analog video transmission interface based on audio jack - Google Patents
Automatic detection type analog video transmission interface based on audio jack Download PDFInfo
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- CN115037899A CN115037899A CN202110238505.1A CN202110238505A CN115037899A CN 115037899 A CN115037899 A CN 115037899A CN 202110238505 A CN202110238505 A CN 202110238505A CN 115037899 A CN115037899 A CN 115037899A
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- audio
- socket
- jack
- audio jack
- transmission interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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- Multimedia (AREA)
- Signal Processing (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The invention discloses an automatic detection type analog video transmission interface based on an audio jack, which comprises an audio socket, wherein a digital signal reference Ground (GND) end is embedded in one end of the audio socket, an audio signal output end I is embedded in one end of the audio socket, an audio signal output end II is embedded in one end of the audio socket, an audio signal reference ground (AGND) end I is embedded in one end of the audio socket, and an audio signal reference ground (AGND) end II is embedded in one end of the audio socket; according to the invention, through the change of the logic level of the I/O port, when an audio plug is not plugged into an audio socket, the microprocessor MCU indicates that video output is not needed, and the output end Y output of the audio plug detection circuit is a logic high level; when the audio plug is plugged into the audio socket, the requirement of video output is indicated, and the output end Y of the audio plug detection circuit outputs logic low level, so that the corresponding video circuit is started and closed, the stability of the audio circuit is improved, the energy consumption of the whole system is saved, and the practicability is high.
Description
Technical Field
The invention relates to the technical field of analog video transmission interface equipment, in particular to an automatic detection type analog video transmission interface based on an audio jack.
Background
Video is an important form of human-computer interaction, and is a function that many electronic devices must have. Video transmission to the external port needs to be stable and convenient to operate. Based on this, the invention innovatively uses the common device of the audio socket as the video transmission interface.
The market has more and more strict requirements on indexes such as power consumption, standby time and the like of electronic products, and when a certain function of the product is not used, the function is turned off, so that the method is an important method for saving energy consumption and improving the standby time.
Disclosure of Invention
The present invention is directed to an automatic detection type analog video transmission interface based on audio jacks, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an automatic detection type simulation video transmission interface based on audio jack, includes the audio frequency socket, audio frequency socket one end inlays and is equipped with digital signal reference ground GND end, audio frequency socket one end inlays and is equipped with audio signal output part one, audio frequency socket one end inlays and is equipped with audio signal reference ground AGND end two, audio frequency socket one end is inlayed and is equipped with audio frequency hole and inserts the instruction signal output part.
As a further scheme of the invention: the portable audio device comprises an audio socket and is characterized in that an input end A is arranged at one end of the audio socket, one end of the audio socket is electrically connected with a current limiting resistor R1, one end of the audio socket is electrically connected with a pull-up resistor R2, one end of the audio socket is electrically connected with a pull-up resistor R3, one end of the audio socket is electrically connected with a PNP triode Q1, one end of the audio socket is electrically connected with a microprocessor MCU, one end of the microprocessor MCU is provided with an I/O port, the I/O port is electrically connected with an output end Y, and the type of the triode Q1 is SS 8550.
As a still further scheme of the invention: the current limiting resistor R1, the pull-up resistor R2, the pull-up resistor R3, the PNP triode Q1 and the microprocessor MCU form an automatic monitoring circuit.
As a still further scheme of the invention: the input end A is connected with an audio hole insertion indication signal output end 7; and the output end Y is connected with an I/O port of the microprocessor MCU.
As a still further scheme of the invention: the audio socket and the audio plug are used in a matched mode.
As a still further scheme of the invention: the audio socket is packaged by a 6-pin PCB patch, the pin of an audio signal output tube of the audio socket is connected with the anode of an analog video signal, the reference ground of the audio signal of the audio socket is connected with the reference ground of the analog video signal, the transmission interface supports various analog video formats such as PAL and NTSC, and the corresponding plug is an audio plug.
Compared with the prior art, the invention has the beneficial effects that:
1. the transistor Q1 comprises a base electrode, a collector electrode and an emitter electrode. The collector of the circuit board is connected to the reference ground GND of the circuit board; the emitting set is a circuit output end and is connected with general IO of the MCU, a base electrode is pulled to a high level by a pull-up resistor R2 through a current-limiting resistor R1, when an audio plug is not inserted into an audio socket, a triode Q1 is conducted, the circuit output end is a low level, namely an I/O port signal received by the MCU is a logic low level, when the audio plug is inserted into the audio socket, the pull-up resistor R2 is short-circuited, the triode Q1 is not conducted, the circuit output end is a high level, and the I/O port received by the MCU is a logic high level. Namely, when the logic level of the I/O port received by the Microprogrammed Control Unit (MCU) is high, the power supply of the video circuit is turned off, and the system enters a standby state, so that the aim of saving power is fulfilled.
Drawings
Fig. 1 is a schematic structural diagram of an analog video transmission interface of an automatic detection type based on an audio jack.
Fig. 2 is a schematic diagram of a circuit connection structure of an audio jack and an audio plug of an analog video transmission interface of the automatic detection type based on an audio jack.
Fig. 3 is a schematic diagram of a circuit connection structure of an automatic detection circuit in an analog video transmission interface of an automatic detection type based on an audio jack.
In the figure: the audio jack comprises a 1-audio jack, a 2-digital signal reference ground GND terminal, a 3-audio signal output terminal I, a 4-audio signal output terminal II, a 5-audio signal reference ground AGND terminal I, a 6-audio signal reference ground AGND terminal II and a 7-audio hole insertion indication signal output terminal.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, in an embodiment of the present invention, an analog video transmission interface of automatic detection type based on an audio jack includes an audio jack 1, a digital signal ground GND terminal 2 is embedded in one end of the audio jack 1, an audio signal output terminal 3 is embedded in one end of the audio jack 1, an audio signal output terminal two 4 is embedded in one end of the audio jack 1, an audio signal ground AGND terminal 5 is embedded in one end of the audio jack 1, an audio signal ground AGND terminal two 6 is embedded in one end of the audio jack 1, an audio jack insertion indication signal output terminal 7 is embedded in one end of the audio jack 1, an input terminal a is disposed in one end of the audio jack 1, a current limiting resistor R1 is electrically connected to one end of the audio jack 1, a pull-up resistor R2 is electrically connected to one end of the audio jack 1, a pull-up resistor R3 is electrically connected to one end of the audio jack 1, one end of the audio socket 1 is electrically connected with a PNP triode Q1, one end of the audio socket 1 is electrically connected with a microprocessor MCU, one end of the microprocessor MCU is provided with an I/O port, the I/O port is electrically connected with an output end Y, the model of the triode Q1 is SS8550, the current limiting resistor R1, the pull-up resistor R2, the pull-up resistor R3, the PNP triode Q1 and the microprocessor MCU form an automatic monitoring circuit, and the input end A is connected with an audio hole insertion indicating signal output end 7; the output end Y is connected with an I/O port of the MCU, the audio socket and the audio plug are used in a matched mode, the audio socket 1 is a 6-pin PCB patch package, the pin of an audio signal output tube of the audio socket 1 is connected with the anode of an analog video signal, the audio signal reference ground of the audio socket 1 is connected with the analog video signal reference ground, the transmission interface supports various analog video formats such as PAL and NTSC, and the corresponding plug is the audio plug 8.
The working principle of the invention is as follows: an audio signal output pin, an audio signal output end I3 and an audio signal output end II 4 of the audio socket 1 are connected with the anode of an analog video signal, an audio signal reference pin, an audio signal reference ground AGND end II 6 and an audio hole insertion indication signal output end 7 of the audio socket are connected with the analog video signal reference ground, and the triode Q1 comprises a base electrode, a collector electrode and an emitter electrode. The collector of the circuit board is connected to the reference ground GND of the circuit board; the audio jack automatic detection circuit is characterized in that an audio plug 8 at the video output end is not inserted into the audio socket 1, which indicates that no video demand exists, and the microprocessor MCU turns off the power supply of the video module; otherwise, the microprocessor MCU will turn on the power supply of the video module to enable the video module to work normally, when the audio plug 8 is inserted into the audio seat 1, it is indicated that video output is needed, and the microprocessor MCU will turn on the power supply of the video module; when the audio plug 8 is not inserted into the audio socket 1, it indicates that video output is not needed, the microprocessor MCU turns off the power supply of the video module, the transmitting set is a circuit output end and is connected to the general IO of the microprocessor MCU, the base is pulled to a high level by the pull-up resistor R2 through the current limiting resistor R1, when the audio plug is not inserted into the audio socket, the transistor Q1 is turned on, the circuit output end is a low level, that is, the I/O port signal received by the microprocessor MCU is a logic low level, when the audio plug 8 is inserted into the audio socket 1, the pull-up resistor R2 is short-circuited, the transistor Q1 is not turned on, the circuit output end is a high level, and the I/O port received by the microprocessor MCU is a logic high level. When the logic level of an I/O port received by the MCU is high, the power supply of the video circuit is turned off, the insertion detection function of the audio plug 8 is supported, a resistor is arranged in the audio socket 1, one end of the resistor is externally connected with a pin 1 of the audio socket, the pin 1 is externally and directly connected with a signal reference ground GND on a circuit board, when the audio plug is inserted, an audio hole insertion indication signal output end 7 in the audio socket 1 is communicated with the other end of the internal resistor of the audio socket 1, the audio hole insertion indication signal output end 7 is pulled down, logic low level output is realized, when the audio plug 8 is inserted into the audio socket 1, the input end A of the detection circuit is logic low level, the triode Q1 is not conducted, and the output end Y is logic high level; when the audio jack is not plugged with the audio socket 1, the input end A is in a logic high level, the triode Q1 is conducted, the output end Y is in a logic low level, when the audio plug 8 is plugged into the audio socket 1, the microprocessor MCU automatically judges whether the audio plug 8 is plugged or not according to the level logic of the input end of the detection circuit, when the audio plug 8 is plugged, the analog video circuit is automatically started, analog video is output, when the audio plug 8 is not plugged, the power supply of the analog video related circuit is cut off, and the system enters a standby state.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides an automatic detection type simulation video transmission interface based on audio jack, includes audio socket (1) and audio plug (8), its characterized in that, audio socket (1) one end is inlayed and is equipped with digital signal reference ground GND end (2), audio socket (1) one end is inlayed and is equipped with audio signal output part (3), audio socket (1) one end is inlayed and is equipped with audio signal output part two (4), audio socket (1) one end is inlayed and is equipped with audio signal reference ground AGND end (5), audio socket (1) one end is inlayed and is equipped with audio signal reference ground AGND end two (6), audio socket (1) one end is inlayed and is equipped with the audio jack and inserts pilot signal output part (7).
2. The audio jack-based analog video transmission interface for automatic detection of the video according to claim 1, wherein an input terminal a is provided at one end of the audio jack (1), a current limiting resistor R1 is electrically connected at one end of the audio jack (1), a pull-up resistor R2 is electrically connected at one end of the audio jack (1), a pull-up resistor R3 is electrically connected at one end of the audio jack (1), a PNP transistor Q1 is electrically connected at one end of the audio jack (1), a microprocessor MCU is electrically connected at one end of the microprocessor MCU, an I/O port is provided at one end of the microprocessor MCU, an output terminal Y is electrically connected at the I/O port, and the transistor Q1 has a model number SS 8550.
3. The analog-to-video transmission interface of automatic detection type based on audio jack according to claim 2, wherein the current limiting resistor R1, the pull-up resistor R2, the pull-up resistor R3, the PNP transistor Q1 and the microprocessor MCU constitute an automatic monitoring circuit.
4. Analog video transmission interface of the automatic detection type based on audio jacks according to claim 1, characterized in that said input a is connected to an audio jack insertion indication signal output (7); and the output end Y is connected with an I/O port of the microprocessor MCU.
5. Analog video transmission interface of the audio-jack based automatic detection type, according to claim 1, characterized in that the audio jack (1) is paired with an audio plug (8).
6. The audio jack-based analog-video transmission interface of automatic detection type according to claim 1, wherein the audio jack (1) is a 6-pin PCB chip package, the output pin of the audio signal of the audio jack is connected to the positive electrode of the analog video signal, the reference ground of the audio signal of the audio jack is connected to the reference ground of the analog video signal, the transmission interface supports a plurality of analog video formats such as PAL and NTSC, and the corresponding plug is an audio plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110238505.1A CN115037899A (en) | 2021-03-04 | 2021-03-04 | Automatic detection type analog video transmission interface based on audio jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110238505.1A CN115037899A (en) | 2021-03-04 | 2021-03-04 | Automatic detection type analog video transmission interface based on audio jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115037899A true CN115037899A (en) | 2022-09-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110238505.1A Pending CN115037899A (en) | 2021-03-04 | 2021-03-04 | Automatic detection type analog video transmission interface based on audio jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115037899A (en) |
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2021
- 2021-03-04 CN CN202110238505.1A patent/CN115037899A/en active Pending
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