CN110209371A - A kind of audio compatible circuit and video and audio equipment - Google Patents
A kind of audio compatible circuit and video and audio equipment Download PDFInfo
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- CN110209371A CN110209371A CN201910407194.XA CN201910407194A CN110209371A CN 110209371 A CN110209371 A CN 110209371A CN 201910407194 A CN201910407194 A CN 201910407194A CN 110209371 A CN110209371 A CN 110209371A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/16—Sound input; Sound output
- G06F3/162—Interface to dedicated audio devices, e.g. audio drivers, interface to CODECs
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
Abstract
The invention discloses a kind of audio compatible circuit and video and audio equipments, wherein the circuit includes: the first audio interface, for connecting the second audio interface；Control module, for configuring the first voicefrequency circuit for audio compatible circuit when having detected vision signal input；Detection module is connected between the first audio interface and control module, for when vision signal input has been not detected in control module, whether the first audio interface of detection to have the second audio interface of access sound collector；Control module is also used to configure the second voicefrequency circuit for audio compatible circuit when detection module detects that the first audio interface has the second audio interface of access sound collector；Audio signal transmission module is used for after audio compatible circuit is configured to the first voicefrequency circuit or the second voicefrequency circuit by control module, by the first audio signal of input or the second audio signal transmission to control module.The present invention can reduce the volume of video and audio equipment and reduce the hardware cost of equipment.
Description
Technical field
The present invention relates to electronic technology field more particularly to a kind of audio compatible circuits and video and audio equipment.
Background technique
Many video and audio equipments on the market can play out the audio signal of microphone input, also can be in video
Audio signal play out, to meet a variety of demands of user.When usually receiving vision signal, need the figure of vision signal
As signal and audio signal are separately transmitted, to prevent generating interference between stop signal.
In the prior art, for meet user a variety of audio signals play demand, it will usually be in video and audio equipment
Different voicefrequency circuits is arranged in different audio signals, and to configure different receive capabilities in different voicefrequency circuits.For example,
In video and audio equipment, setting one is used to receive the voicefrequency circuit of the audio signal in VGA vision signal, to realize that video is believed
Picture signal and audio signal are separately transmitted in number, also set up one dedicated for the sound for the audio signal for receiving microphone input
Frequency circuit.
However, the technical solution for using the prior art to provide increases corresponding voicefrequency circuit for every kind of audio signal, can lead
The volume of video and audio equipment is caused to increase, the hardware cost of video and audio equipment can also be increase accordingly.
Summary of the invention
The technical problem to be solved by the present invention is to design a kind of voicefrequency circuit and video and audio equipment, can reduce video and audio
The volume of equipment, and reduce the hardware cost of video and audio equipment.
In a first aspect, in order to solve the above technical problems, the embodiment of the invention provides a kind of audio compatible circuit, it is described
Circuit includes:
First audio interface, for connecting the second audio interface, to receive the audio letter of the second audio interface transmission
Number；
Control module, for when having detected vision signal input, the audio compatible circuit being configured for connecing
Receive the first voicefrequency circuit of the first audio signal in the vision signal；
Audio signal transmission module is connected between first audio interface and the control module, for described
After the audio compatible circuit is configured to first voicefrequency circuit by control module, by first audio interface input
First audio signal transmission is to the control module；
Detection module is connected between first audio interface and the control module, for working as the control module
When vision signal input has been not detected, detect whether first audio interface has the second audio of access sound collector to connect
Mouthful；
The control module is also used to detect that first audio interface has access sound collection when the detection module
When the second audio interface of device, the audio compatible circuit is configured for receive the second audio of second audio signal
Circuit；
The audio signal transmission module is also used to be configured to the audio compatible circuit in the control module described
After second voicefrequency circuit, by the second audio signal transmission of first audio interface input to the control module.
Further, the control module includes the first treatment channel and second processing channel；First treatment channel
Input terminal, the second processing channel input terminal connect respectively with the output end of the audio signal transmission module；Wherein,
First treatment channel is for handling first audio signal；
The second processing channel is for handling second audio signal；
The control module is specifically used for:
When having detected vision signal input, the input terminal of first treatment channel is configured to open state, and
The input terminal in the second processing channel is configured to closed state, configures first sound for the audio compatible circuit
Frequency circuit；
When the detection module detects that first audio interface has the second audio interface of access sound collector,
The input terminal in the second processing channel is configured to open state, and the input terminal of first treatment channel is configured to close
The audio compatible circuit is configured second voicefrequency circuit by closed state.
Further, the audio signal transmission module includes first resistor, second resistance, 3rd resistor and the 4th electricity
Resistance；The input terminal of first treatment channel include first treatment channel first input end and first treatment channel
The second input terminal；The output end of the audio signal transmission module includes the first output end of the audio signal transmission module
Wherein with the second output terminal of the audio signal transmission module,
The first end of the first resistor is connect with the second pin of first audio interface, and the of the first resistor
Two ends are connect with the first input end of first treatment channel；The second end of the first resistor is also logical with the second processing
The input terminal in road connects；
The first end of the second resistance is connect with the third pin of first audio interface, and the of the second resistance
Two ends are connect with the second input terminal of first treatment channel；The second end of the second resistance is also logical with the second processing
The input terminal in road connects；
The first end of the 3rd resistor is connect with the second end of the first resistor, the second termination of the 3rd resistor
Ground；The first end of 4th resistance is connect with the second end of the second resistance, the second end ground connection of the 4th resistance；
The second end of the first resistor is the first output end of the audio signal transmission module, the second resistance
Second end is the second output terminal of the audio signal transmission module.
Further, the audio signal transmission module further includes first capacitor and the second capacitor；Wherein,
The first end of the first capacitor is connect with the second end of the first resistor, the second end of the first capacitor with
The first input end of first treatment channel connects；
The first end of second capacitor is connect with the second end of the second resistance, the second end of second capacitor with
Second input terminal of first treatment channel connects；
The second end of the first capacitor is the first output end of the audio signal transmission module, second capacitor
Second end is the second output terminal of the audio signal transmission module.
Further, the detection module includes DC power supply, the 5th resistance, the 6th resistance and triode；Wherein,
The first end of 5th resistance is connect with the first pin of first audio interface, and the of the 5th resistance
Two ends are connect with the first end of the triode；Wherein, when first audio interface is not connect with second audio interface
When, the first pin of first audio interface is connected to the second pin of first audio interface；
The first end of 6th resistance is connect with the first end of the 5th resistance, the second end of the 6th resistance with
The second end of the triode connects；
The third end of the triode is connect with the test side of the control module；
The DC power supply is connect with the second end of the 5th resistance.
Further, the detection module further includes the 7th resistance and the 8th resistance；Wherein,
The first end of 7th resistance is connect with the third end of the triode, the second termination of the 7th resistance
Ground；
The first end of 8th resistance is connect with the third end of the triode, the second end of the 8th resistance and institute
State the test side connection of control module.
Further, the triode is PNP type triode；The first end of the triode is the PNP type triode
Emitter, the second end of the triode is the base stage of the PNP type triode, and the third end of the triode is described
The collector of PNP type triode.
Further, first audio signal is VGA sound accompaniment audio signal or DVI sound accompaniment audio signal.
Further, first audio interface is audio-video compound interface；The sound collector is microphone or record
Sound machine.
Second aspect, in order to solve identical technical problem, the embodiment of the present invention also provides a kind of video and audio equipment, described
Device includes the audio compatible circuit and video reception module that above-mentioned first aspect any embodiment provides；The video letter
Number receiving module includes video interface, the 9th resistance, the tenth resistance, eleventh resistor and twelfth resistor；Wherein,
First pin of the video interface is connect with the first end of the 9th resistance, the second end of the 9th resistance
It is connect with the first video signal input terminal of the control module；
The second pin of the video interface is connect with the first end of the tenth resistance, the second end of the tenth resistance
It is connect with the second video signal input terminal of the control module；
The first end of the eleventh resistor is connect with the second end of the 9th resistance, and the second of the eleventh resistor
End ground connection；
The first end of the twelfth resistor is connect with the second end of the tenth resistance, and the second of the twelfth resistor
End ground connection.
A kind of audio compatible circuit and video and audio equipment of above-mentioned offer, can by detect the input condition of vision signal come
Audio signal needed for judging user carries out functional configuration to audio compatible circuit by control module, so that passing through a sound
Frequency compatible circuit can be realized and can be handled the first audio signal in vision signal and defeated to sound collector
The second audio signal entered carries out transmission process, does not need that different voicefrequency circuits is arranged for every kind of audio signal, to reduce
The volume and hardware cost of video and audio equipment.
Detailed description of the invention
Fig. 1 is a kind of structural representation of the first preferred embodiment of audio compatible circuit provided in an embodiment of the present invention
Figure；
Fig. 2 is a kind of structural representation of second of preferred embodiment of audio compatible circuit provided in an embodiment of the present invention
Figure；
Fig. 3 is a kind of structural representation of the third preferred embodiment of audio compatible circuit provided in an embodiment of the present invention
Figure；
Fig. 4 is a kind of structural schematic diagram of video and audio equipment provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention provides a kind of audio compatible circuits, referring to Fig. 1, it is provided in an embodiment of the present invention one
The structural schematic diagram of the first preferred embodiment of kind audio compatible circuit；Specifically, the circuit includes:
First audio interface 1, for connecting the second audio interface, to receive the audio letter of the second audio interface transmission
Number；
Control module 2, for when having detected vision signal input, the audio compatible circuit being configured for connecing
Receive the first voicefrequency circuit of the first audio signal in the vision signal；
Audio signal transmission module 3 is connected between first audio interface 1 and the control module 2, in institute
It states after the audio compatible circuit is configured to first voicefrequency circuit by control module 2, first audio interface 1 is defeated
The first audio signal transmission entered is to the control module 2；
Detection module 4 is connected between first audio interface 1 and the control module 2, for working as the control mould
When vision signal input has been not detected in block 2, the second sound whether first audio interface 1 has access sound collector is detected
Frequency interface；
The control module 2 is also used to detect that first audio interface 1 has access sound to adopt when the detection module 4
When the second audio interface of storage, the audio compatible circuit is configured for receive the second sound of second audio signal
Frequency circuit；
The audio signal transmission module 3 is also used to that the audio compatible circuit is configured to institute in the control module 2
After stating the second voicefrequency circuit, the second audio signal transmission that first audio interface 1 is inputted to the control module 2.
It should be noted that the second audio interface may be the audio interface in sound collector, it is also possible to which other set
Standby audio interface, whether detection module only accesses the first audio interface in audio compatible circuit provided in an embodiment of the present invention
There is the second audio interface of sound collector to be detected.
The video interface that video and audio equipment is arranged in can only receive picture signal in vision signal, need in addition to be arranged one
A interface transmits the audio signal in vision signal, and the first audio signal in vision signal in the present invention is to regard
Audio signal in frequency signal.Second audio signal be sound collector input audio signal, such as microphone, recorder or
Voice signal after the sound for collecting user, is converted into audio letter by the equipment such as the certain MP3 that can acquire sound of person, mobile phone
Number, the first audio interface is connected by the second audio interface of sound collector, the second audio signal is input to video and audio
In equipment.
Vision signal is inputted by the video interface of video and audio equipment, and control module can be by detecting whether video interface has
Vision signal input, to determine whether to have detected vision signal input.
Specifically, illustrating that the first audio interface is needed to video and audio when control module has detected vision signal input
Equipment transmission is the first audio signal；At this point, control module need to configure the function of audio compatible circuit, audio is simultaneous
Capacitive circuit is configured for receiving the first voicefrequency circuit of the first audio signal in vision signal, and compatible with the audio postponed
Circuit can only carry out transmission process to the first audio signal.If received the first audio interface is not the first audio signal, due to
The function restriction of audio compatible circuit, control module cannot be handled the audio signal of mistake；For example, if user is by Mike
Second audio interface of wind accesses the first audio interface, and after configuring to audio compatible circuit, audio compatible circuit cannot
Second audio signal of microphone input is handled.If received the first audio interface is the first audio signal, the first sound
Frequency signal can by audio signal transmission module transfer to control module so that control module to the first audio signal at
Reason；For example, the second audio interface of VGA tone frequency channel wire is accessed the first audio and connect by user after to the configuration of audio compatible circuit
Mouthful, the audio signal of VGA vision signal can be by audio signal transmission module transfer to control module, so that control module pair
First audio signal of VGA tone frequency channel wire input is handled.
When vision signal input has been not detected in control module, illustrate the first Audio Signal Processing of not vision signal
Demand, at this point, detection module detects the connection state of the second audio interface to the second audio signal of transmission, with determination
Whether need to the second Audio Signal Processing；When detection module detects the second audio of the first audio interface and sound collector
When interface connects, control module will configure the function of audio compatible circuit, and audio compatible circuit is configured for connecing
Receive the second voicefrequency circuit of the second audio signal of sound collector input；And it can only be to second with the audio compatible circuit postponed
Audio signal carries out transmission process.When the second audio interface of sound collector inputs the second audio signal to audio compatible circuit
When, the second audio signal can will believe the second audio by audio signal transmission module transfer to control module, control module
It number is handled.For example, detection module detects after the second audio interface of microphone is accessed the first audio interface by user
First audio interface has accessed the second audio interface of sound collector, and audio compatible circuit is configured to the second sound by control module
Frequency circuit, the second audio signal can pass through audio signal transmission module transfer to control module.
It should be noted that when audio compatible circuit is not received by required audio signal, for no prompting function
The video and audio equipment of energy, the first audio signal required for user can discover whether when in use or the second audio signal are defeated
Out, independently to judge whether to have accessed the second wrong audio interface, the audio signal of mistake is provided, if user has found access
Second audio interface of mistake, user can replace the second audio interface.For having the video and audio equipment of prompting function, video and audio
Whether equipment reminds the audio signal of user's input correct, and user can carry out the second audio interface of the first audio signal of access
Replacement.
Optionally, control module carries out functional configuration to audio compatible circuit, can be arranged to control module not to mistake
Accidentally audio signal handled, or be configured to mistake audio signal cannot be transmitted to control module, to realize that audio is simultaneous
The functional configuration of capacitive circuit.
Audio compatible circuit provided in an embodiment of the present invention can judge user by detecting the input condition of vision signal
Required audio signal carries out functional configuration to audio compatible circuit by control module, so that passing through the compatible electricity of an audio
Road, which can be realized, can be handled the first audio signal in vision signal and to the second of sound collector input
Audio signal carries out transmission process, does not need that different voicefrequency circuits is arranged for every kind of audio signal, to reduce video and audio
The volume and hardware cost of equipment.And for a user, the first audio signal and the second audio signal can't be needed simultaneously
It inputs in the same video and audio equipment, for example, user not may require that television set simultaneously to the companion of the vision signal of computer input
The audio of the microphone of sound signal and access television set carries out processing broadcasting, therefore audio compatible circuit provided in an embodiment of the present invention
Although reduce voicefrequency circuit setting quantity, but not influence user normal use, and compared with the prior art in be every
Corresponding voicefrequency circuit is arranged in kind of audio signal, each application scenarios exist certain voicefrequency circuits leave unused it is unutilized, this
The audio compatible circuit that inventive embodiments provide also improves the utilization rate of the related hardware of video and audio equipment.
Preferably, referring to Fig. 2, it is preferred real second of a kind of audio compatible circuit provided in an embodiment of the present invention
Apply the structural schematic diagram of example；Specifically, the control module 2 includes the first treatment channel 5 and second processing channel 6；Described
The input terminal of one treatment channel 5, the input terminal in the second processing channel 6 are defeated with the audio signal transmission module 3 respectively
Outlet connection；Wherein,
First treatment channel 5 is for handling first audio signal；
The second processing channel 6 is for handling second audio signal；
The control module 2 is specifically used for:
When having detected vision signal input, the input terminal of first treatment channel 5 is configured to open state, and
The input terminal in the second processing channel 6 is configured to closed state, configures described first for the audio compatible circuit
Voicefrequency circuit；
When the detection module 4 detects that first audio interface 1 has the second audio interface of access sound collector
When, the input terminal in the second processing channel 6 is configured to open state, and the input terminal of first treatment channel 5 is matched
It is set to closed state, configures second voicefrequency circuit for the audio compatible circuit.
Audio compatible circuit provided in an embodiment of the present invention, control module are corresponding by preventing the audio signal input of mistake
Treatment channel, realize the function to audio compatible circuit by only allowing correct audio signal to input correct treatment channel
It can configuration.Specifically, the input terminal of the first treatment channel is configured to open state when having detected vision signal input,
And the input terminal in second processing channel is configured to closed state, enable the first audio signal to pass through audio signal transmission mould
Block inputs the first treatment channel, and the second audio signal cannot input second processing channel, and the second audio signal can not again the
One treatment channel is handled, and configures the first voicefrequency circuit for audio compatible circuit；When video is not detected in control module
When signal, detection module accesses the second audio interface for whether having sound collector to the first audio interface；Work as detection module
When detecting that the first audio interface has the second audio interface of access sound collector, control module is defeated by second processing channel
Enter end and be configured to open state, and the input terminal of the first treatment channel is configured to closed state so that the first audio signal without
Method inputs the first treatment channel, and can not handle in second processing channel, and the second audio signal can pass through audio signal transmission
Module transfer to second processing channel is handled, and configures the second voicefrequency circuit for audio compatible circuit.
It should be noted that the input terminal of the first treatment channel in control module, the input terminal in second processing channel are each
It can be arranged according to the actual situation from included specific pin number, i.e., the input terminal of the first treatment channel, second processing are logical
The input terminal in road may be respectively made of one or more pins, as long as can be applicable in the first audio signal, the second audio letter
Number transmission, reception processing.Optionally, the input terminal of the first treatment channel by left channel pin and right channel pin this 2
A input pin is constituted；The input terminal in second processing channel is made of an input pin.
The open state and closing of the input terminal of the first treatment channel in control module, the input terminal in second processing channel
The setting of state can be specifically arranged according to practical situations.Optionally, the closed state of the input terminal of the first treatment channel is
The input end of first treatment channel is second processing channel in high-impedance state, the closed state of the input terminal in second processing channel
Input end in high-impedance state；If the input terminal of the first treatment channel, second processing channel input terminal and control module in
Between the processing module in portion be equipped with switch, then the input terminal of the first treatment channel, second processing channel input terminal closing shape
State can be in an off state for switch.
Audio compatible circuit provided in an embodiment of the present invention only controls the input of the first treatment channel by control module
The open state and closed state of the input terminal at end, second processing channel can be achieved with the functional configuration of audio compatible circuit, no
The type to the audio signal of input is needed to be detected, the cumbersome step such as discriminatory analysis can be achieved with corresponding function and match
It sets, reduces the R&D cycle of audio compatible circuit.
Preferably, referring to Fig. 3, it is a kind of the third preferred reality of audio compatible circuit provided in an embodiment of the present invention
Apply the structural schematic diagram of example；Specifically, the audio signal transmission module 3 includes first resistor R1, second resistance R2, third electricity
Hinder R3 and the 4th resistance R4；The input terminal of first treatment channel 5 includes the first input end of first treatment channel 5
The second input terminal IC1_L of IC1_R and first treatment channel；The output end of the audio signal transmission module 3 includes institute
State the first output end LINEIN_R of audio signal transmission module and the second output terminal of the audio signal transmission module
LINEIN_L；Wherein,
The first end of the first resistor R1 is connect with the second pin P2 of first audio interface 1, first electricity
The second end of resistance R1 is connect with the first input end IC1_R of first treatment channel 5；The second end of the first resistor R1 is also
It is connect with the input terminal IC2 in the second processing channel 6；
The first end of the second resistance R2 is connect with the third pin P3 of first audio interface 1, second electricity
The second end of resistance R2 is connect with the second input terminal IC1_L of first treatment channel 5；The second end of the second resistance R2 is also
It is connect with the input terminal IC2 in the second processing channel 6；
The first end of the 3rd resistor R3 is connect with the second end of the first resistor R1, and the of the 3rd resistor R3
Two ends ground connection；The first end of the 4th resistance R4 is connect with the second end of the second resistance R2, the 4th resistance R4's
Second end ground connection；
The second end of the first resistor R1 is the first output end LINEIN_R of the audio signal transmission module 3, institute
The second end for stating second resistance R2 is the second output terminal LINEIN_L of the audio signal transmission module 3.
It should be noted that the first treatment channel includes first input end IC1_R and the second input terminal IC1_L, respectively with
First output end LINEIN_R of audio signal transmission module is connected with second output terminal LINEIN_L, the first audio can be believed
Number left channel audio signal and right channel audio signal be separately transmitted to the first treatment channel and handled；And audio signal passes
Input terminal IC2 of the first output end LINEIN_R and second output terminal LINEIN_L of defeated module with second processing channel, will
Second audio signal is merged into input in second processing channel afterwards all the way and be handled.
Specifically, audio compatible circuit provided in an embodiment of the present invention by first resistor, second resistance, 3rd resistor and
4th resistance realizes the impedance matching between the input terminal and output end both ends of audio signal transmission module, reduces audio signal
Loss in transmission process, preferably by audio signal transmission to control module.
Preferably, the audio signal transmission module 3 further includes first capacitor C1 and the second capacitor C2；Wherein,
The first end of the first capacitor C1 is connect with the second end of the first resistor R1, and the of the first capacitor C1
Two ends are connect with the first input end IC1_R of first treatment channel 5；
The first end of the second capacitor C2 is connect with the second end of the second resistance R2, and the of the second capacitor C2
Two ends are connect with the second input terminal IC1_L of first treatment channel 5；
The second end of the first capacitor C1 is the first output end LINEIN_R of the audio signal transmission module 3, institute
The second end for stating the second capacitor C2 is the second output terminal LINEIN_L of the audio signal transmission module 3.
Specifically, audio compatible circuit provided in an embodiment of the present invention, the second end of first resistor by first capacitor with
The first input end of first treatment channel connects, and the second end of second resistance passes through the second of the second capacitor and the first treatment channel
Input terminal connection is prevented to be filtered out the direct current signal of input audio signal transmission module by first capacitor and the second capacitor
Only direct current signal disturbs control module and analyzes the processing of audio signal.
Preferably, the detection module 4 includes DC power supply VCC, the 5th resistance R5, the 6th resistance R6 and triode Q1；
Wherein,
The first end of the 5th resistance R5 is connect with the first pin P1 of first audio interface 1, the 5th electricity
The second end of resistance R5 is connect with the first end of the triode Q1；Wherein, when first audio interface 1 not with second sound
When frequency interface connects, the first pin P1 of first audio interface 1 and the second pin P2 of first audio interface 1 connect
It is logical；
The first end of the 6th resistance R6 is connect with the first end of the 5th resistance R5, and the of the 6th resistance R6
Two ends are connect with the second end of the triode Q1；
The third end of the triode Q1 is connect with the test side of the control module 2；
The DC power supply VCC is connect with the second end of the 5th resistance R5.
It should be noted that the first pin of the first audio interface is equipped with metal clips, when the second sound of sound collector
When frequency interface does not access the first audio interface, metal clips and the second pin P2 that the first pin P1 is equipped with contact with each other, this
When the first pin P1 and second pin P2 realization be connected to, realization DC power supply VCC, the 5th resistance R5, first resistor R1 and third
Resistance R3 connection.When the second audio interface of sound collector accesses the first audio interface, the second audio interface promotes first
The metal clips that first pin P1 of audio interface is equipped with is flicked from second pin P2, i.e. the second audio interface disconnects the first sound
First pin P1 of frequency interface and being connected to for second pin P2, second pin P2 is for receiving the second audio signal at this time, and second
The second audio signal that pin P2 is received passes through audio signal transmission module transfer to control module.
Specifically, when vision signal input has been not detected in control module, if not the second audio of sound collector
Interface accesses the first audio interface, and the first pin of the first audio interface is connected to second pin at this time, the 5th resistance, the first electricity
Resistance and 3rd resistor form partial pressure, triode ON, test side input high level from the third end of triode to control module, this
When, control module learns that the second audio interface of sound collector does not access the first audio interface.If the of sound collector
Two audio interface access the first audio interface, at this time separated, three poles of the first pin of the first audio interface and second pin
The first end and second end of pipe is high level, and triode cut-off, there is low level input in the test side of control module, at this point, control
Molding block learns the second audio interface access of sound collector, needs audio compatible circuit being configured to the second audio-frequency electric
Road.
Audio compatible circuit provided in an embodiment of the present invention passes through DC power supply, the 5th resistance, the 6th resistance and triode
It is detected to whether the second audio interface of sound collector is inserted into the first audio interface, to determine the need for the second sound
Frequency signal is received, is handled, and when the second audio interface for detecting sound collector accesses the first audio interface, control
Audio compatible circuit is configured to the second voicefrequency circuit by molding block.
Preferably, the detection module 4 further includes the 7th resistance R7 and the 8th resistance R8；Wherein,
The first end of the 7th resistance R7 is connect with the third end of the triode Q1, and the second of the 7th resistance R7
End ground connection；
The first end of the 8th resistance R8 is connect with the third end of the triode Q1, and the second of the 8th resistance R8
End is connect with the test side of the control module 2.
Specifically, audio compatible circuit provided in an embodiment of the present invention, carries out level by the 7th resistance and the 8th resistance
Matching.
Preferably, the triode Q1 is PNP type triode；The first end of the triode Q1 is three pole of positive-negative-positive
The emitter of pipe, the second end of the triode Q1 are the base stage of the PNP type triode, and the third end of the triode Q1 is
The collector of the PNP type triode.
Specifically, triode provided in an embodiment of the present invention is PNP type triode, to realize the first end by triode
The on state of triode is controlled with the voltage of second end.
Preferably, first audio signal is VGA sound accompaniment audio signal or DVI sound accompaniment audio signal.
Specifically, the first audio signal is VGA sound accompaniment audio signal or DVI sound accompaniment audio signal, major part can satisfy
The demand signals of video and audio equipment, such as TV equipment or display equipment, wide adaptability.
Preferably, first audio interface 1 is audio-video compound interface；The sound collector is microphone or recording
Machine.
It should be noted that audio-video compound interface is that one kind can transmit audio signal, and can believe video
Number interface transmitted, also referred to as AV (Audio Video) interface or RCA (Radio Corporation of
American) interface.Correspondingly, the second audio interface is headset plug, three-stage or four-section type headset plug can be used.
Audio compatible circuit provided in an embodiment of the present invention, the first audio interface are audio-video compound interface, sound collection
Device is microphone or recorder, and the second audio signal that microphone or recorder can be supported to input adapts to most of video and audio and sets
Standby function setting, wide adaptability.
It should be noted that as shown in figure 3, the first audio interface 1 is additionally provided with the 4th pin P4, the 5th pin P5, the 6th
Pin P6；Wherein, the 4th pin P4 and the 5th pin P5 are grounded；6th pin P6 is hanging.
When it is implemented, audio compatible circuit provided in an embodiment of the present invention, including the first audio interface, control module,
Audio signal transmission module and detection module；Wherein, the first audio interface, for connecting the second audio interface, to receive second
The audio signal of audio interface transmission；Control module, for when having detected vision signal input, audio compatible circuit to be matched
It is set to the first voicefrequency circuit for receiving the first audio signal in vision signal；Audio signal transmission module is connected to
Between one audio interface and control module, for after audio compatible circuit is configured to the first voicefrequency circuit by control module,
By the first audio signal transmission of the first audio interface input to control module；Detection module, be connected to the first audio interface and
Between control module, for when vision signal input has been not detected in control module, whether the first audio interface of detection to be connect
Enter the second audio interface of sound collector；Control module is also used to detect that the first audio interface has access sound when detection module
When the second audio interface of sound collector, audio compatible circuit is configured for receive the second audio-frequency electric of the second audio signal
Road；Audio signal transmission module is also used to after audio compatible circuit is configured to the second voicefrequency circuit by control module, by
Second audio signal transmission of one audio interface input is to control module.
Audio compatible circuit provided in an embodiment of the present invention can judge user by detecting the input condition of vision signal
Required audio signal carries out functional configuration to audio compatible circuit by control module, so that passing through the compatible electricity of an audio
Road, which can be realized, can be handled the first audio signal in vision signal and to the second of sound collector input
Audio signal carries out transmission process, does not need that different voicefrequency circuits is arranged for every kind of audio signal, to reduce video and audio
The volume and hardware cost of equipment.And for a user, the first audio signal and the second audio signal can't be needed simultaneously
It inputs in the same video and audio equipment, for example, user not may require that television set simultaneously to the companion of the vision signal of computer input
The audio of the microphone of sound signal and access television set carries out processing broadcasting, therefore audio compatible circuit provided in an embodiment of the present invention
Although reduce voicefrequency circuit setting quantity, but not influence user normal use, and compared with the prior art in be every
Corresponding voicefrequency circuit is arranged in kind of audio signal, each application scenarios exist certain voicefrequency circuits leave unused it is unutilized, this
The audio compatible circuit that inventive embodiments provide also improves the utilization rate of the related hardware of video and audio equipment.
The embodiment of the invention also provides a kind of video and audio equipments, referring to Fig. 4, it is provided in an embodiment of the present invention one
The structural schematic diagram of kind video and audio equipment；Specifically, described device includes sound described in any one provided by the above embodiment
Frequency compatible circuit and video reception module 7；The video reception module 7 include video interface 8, the 9th resistance R9,
Tenth resistance R10, eleventh resistor R11 and twelfth resistor R12；Wherein,
First pin of the video interface 8 is connect with the first end of the 9th resistance R9, the 9th resistance R9's
Second end is connect with the first video signal input terminal of the control module 2；
The second pin of the video interface 8 is connect with the first end of the tenth resistance R10, the tenth resistance R10
Second end connect with the second video signal input terminal of the control module 2；
The first end of the eleventh resistor R11 is connect with the second end of the 9th resistance R9, the eleventh resistor
The second end of R11 is grounded；
The first end of the twelfth resistor R12 is connect with the second end of the tenth resistance R10, the twelfth resistor
The second end of R12 is grounded.
Specifically, for video reception module, that whether there is or not vision signals is defeated by detection video interface for video and audio equipment
Enter to determine whether having vision signal input, by the 9th resistance, the tenth resistance, eleventh resistor and twelfth resistor to video
Signal carries out impedance matching makes vision signal more completely be transmitted to control to reduce loss of the vision signal in transmission process
Molding block.
When control module has detected vision signal input, illustrate that the first audio interface needs to transmit to video and audio equipment
Be the first audio signal；At this point, control module need to configure the function of audio compatible circuit, audio compatible circuit is matched
It is set to the first voicefrequency circuit for receiving the first audio signal in vision signal, and can only with the audio compatible circuit postponed
Transmission process is carried out to the first audio signal.If received the first audio interface is not the first audio signal, since audio is compatible
The function restriction of circuit, control module cannot be handled the audio signal of mistake.If received the first audio interface is
One audio signal, the first audio signal can be by audio signal transmission module transfers to control module, so that control module pair
First audio signal is handled.
When vision signal input has been not detected in control module, illustrate the first Audio Signal Processing of not vision signal
Demand, at this point, detection module detects the connection state of the second audio interface to the second audio signal of transmission, with determination
Whether need to the second Audio Signal Processing；When detection module detects the second audio of the first audio interface and sound collector
When interface connects, control module will configure the function of audio compatible circuit, and audio compatible circuit is configured for connecing
Receive the second voicefrequency circuit of the second audio signal of sound collector input；And it can only be to second with the audio compatible circuit postponed
Audio signal carries out transmission process.When the second audio interface of sound collector inputs the second audio signal to audio compatible circuit
When, the second audio signal can will believe the second audio by audio signal transmission module transfer to control module, control module
It number is handled.
It should be noted that the specific work for the audio compatible circuit for including in video and audio equipment provided in an embodiment of the present invention
The working principle of audio compatible circuit provided by the above embodiment is referred to as principle, therefore details are not described herein.
Optionally, the video and audio equipment in the embodiment of the present invention can be the equipment such as TV, display.
It should be noted that in Installation practice attached drawing provided by the invention, the connection relationship between module indicate them it
Between have communication connection, specifically can be implemented as one or more communication bus or signal wire.Those of ordinary skill in the art exist
In the case where not making the creative labor, it can understand and implement.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of audio compatible circuit, which is characterized in that the circuit includes:
First audio interface, for connecting the second audio interface, to receive the audio signal of the second audio interface transmission；
Control module receives institute for when having detected vision signal input, the audio compatible circuit to be configured for
State the first voicefrequency circuit of the first audio signal in vision signal；
Audio signal transmission module is connected between first audio interface and the control module, in the control
After the audio compatible circuit is configured to first voicefrequency circuit by module, by the first of first audio interface input
Audio signal transmission is to the control module；
Detection module is connected between first audio interface and the control module, for not examining when the control module
When having measured vision signal input, the second audio interface whether first audio interface has access sound collector is detected；
The control module is also used to detect that first audio interface has access sound collector when the detection module
When the second audio interface, the audio compatible circuit is configured for receive the second audio-frequency electric of second audio signal
Road；
The audio signal transmission module is also used to that the audio compatible circuit is configured to described second in the control module
After voicefrequency circuit, by the second audio signal transmission of first audio interface input to the control module.
2. audio compatible circuit as described in claim 1, which is characterized in that the control module include the first treatment channel and
Second processing channel；The input terminal of first treatment channel, the second processing channel input terminal respectively with the audio
The output end of signal transmission module connects；Wherein,
First treatment channel is for handling first audio signal；
The second processing channel is for handling second audio signal；
The control module is specifically used for:
When having detected vision signal input, the input terminal of first treatment channel is configured to open state, and by institute
The input terminal for stating second processing channel is configured to closed state, configures first audio-frequency electric for the audio compatible circuit
Road；
When the detection module detects that first audio interface has the second audio interface of access sound collector, by institute
The input terminal for stating second processing channel is configured to open state, and the input terminal of first treatment channel is configured to close shape
The audio compatible circuit is configured second voicefrequency circuit by state.
3. audio compatible circuit as claimed in claim 2, which is characterized in that the audio signal transmission module includes the first electricity
Resistance, second resistance, 3rd resistor and the 4th resistance；The input terminal of first treatment channel includes first treatment channel
Second input terminal of first input end and first treatment channel；The output end of the audio signal transmission module includes described
The second output terminal of first output end of audio signal transmission module and the audio signal transmission module wherein,
The first end of the first resistor is connect with the second pin of first audio interface, the second end of the first resistor
It is connect with the first input end of first treatment channel；The second end of the first resistor also with the second processing channel
Input terminal connection；
The first end of the second resistance is connect with the third pin of first audio interface, the second end of the second resistance
It is connect with the second input terminal of first treatment channel；The second end of the second resistance also with the second processing channel
Input terminal connection；
The first end of the 3rd resistor is connect with the second end of the first resistor, the second end ground connection of the 3rd resistor；
The first end of 4th resistance is connect with the second end of the second resistance, the second end ground connection of the 4th resistance；
The second end of the first resistor be the audio signal transmission module the first output end, the second of the second resistance
End is the second output terminal of the audio signal transmission module.
4. audio compatible circuit as claimed in claim 3, which is characterized in that the audio signal transmission module further includes first
Capacitor and the second capacitor；Wherein,
The first end of the first capacitor is connect with the second end of the first resistor, the second end of the first capacitor with it is described
The first input end of first treatment channel connects；
The first end of second capacitor is connect with the second end of the second resistance, the second end of second capacitor with it is described
Second input terminal of the first treatment channel connects；
The second end of the first capacitor be the audio signal transmission module the first output end, the second of second capacitor
End is the second output terminal of the audio signal transmission module.
5. audio compatible circuit as claimed in claim 3, which is characterized in that the detection module includes DC power supply, the 5th
Resistance, the 6th resistance and triode；Wherein,
The first end of 5th resistance is connect with the first pin of first audio interface, the second end of the 5th resistance
It is connect with the first end of the triode；Wherein, when first audio interface is not connect with second audio interface, institute
The first pin for stating the first audio interface is connected to the second pin of first audio interface；
The first end of 6th resistance is connect with the first end of the 5th resistance, the second end of the 6th resistance with it is described
The second end of triode connects；
The third end of the triode is connect with the test side of the control module；
The DC power supply is connect with the second end of the 5th resistance.
6. audio compatible circuit as claimed in claim 5, which is characterized in that the detection module further includes the 7th resistance and
Eight resistance；Wherein,
The first end of 7th resistance is connect with the third end of the triode, the second end ground connection of the 7th resistance；
The first end of 8th resistance is connect with the third end of the triode, the second end and the control of the 8th resistance
The test side of molding block connects.
7. audio compatible circuit as claimed in claim 5, which is characterized in that the triode is PNP type triode；Described three
The first end of pole pipe is the emitter of the PNP type triode, and the second end of the triode is the base of the PNP type triode
Pole, the third end of the triode are the collector of the PNP type triode.
8. audio compatible circuit as claimed in any one of claims 1 to 7, which is characterized in that first audio signal is
VGA sound accompaniment audio signal or DVI sound accompaniment audio signal.
9. audio compatible circuit as claimed in any one of claims 1 to 7, which is characterized in that first audio interface is
Audio-video compound interface；The sound collector is microphone or recorder.
10. a kind of video and audio equipment, which is characterized in that described device includes that audio described in claim 1 to 9 any one is simultaneous
Capacitive circuit and video reception module；The video reception module include video interface, the 9th resistance, the tenth resistance,
Eleventh resistor and twelfth resistor；Wherein,
First pin of the video interface is connect with the first end of the 9th resistance, the second end of the 9th resistance and institute
State the first video signal input terminal connection of control module；
The second pin of the video interface is connect with the first end of the tenth resistance, the second end of the tenth resistance and institute
State the second video signal input terminal connection of control module；
The first end of the eleventh resistor is connect with the second end of the 9th resistance, the second termination of the eleventh resistor
Ground；
The first end of the twelfth resistor is connect with the second end of the tenth resistance, the second termination of the twelfth resistor
Ground.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112788374A (en) * | 2019-11-05 | 2021-05-11 | 腾讯科技（深圳）有限公司 | Information processing method, device, equipment and storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060026318A1 (en) * | 2004-07-30 | 2006-02-02 | Samsung Electronics Co., Ltd. | Apparatus, medium, and method controlling audio/video output |
| CN101742196A (en) * | 2008-11-11 | 2010-06-16 | 康佳集团股份有限公司 | Implementation method and device capable of recording liquid crystal television personalized explanation |
| CN204697216U (en) * | 2015-06-30 | 2015-10-07 | 徐文波 | Video capture device |
| CN105116787A (en) * | 2015-06-26 | 2015-12-02 | 宁波音王电声股份有限公司 | Controller of audio and video media center system |
| CN105491305A (en) * | 2016-01-21 | 2016-04-13 | 广州番禺职业技术学院 | Intelligent multimedia signal switching device |
| CN205195849U (en) * | 2015-12-07 | 2016-04-27 | 广州视源电子科技股份有限公司 | Signal transmission circuit |
-
2019
- 2019-05-16 CN CN201910407194.XA patent/CN110209371B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060026318A1 (en) * | 2004-07-30 | 2006-02-02 | Samsung Electronics Co., Ltd. | Apparatus, medium, and method controlling audio/video output |
| CN101742196A (en) * | 2008-11-11 | 2010-06-16 | 康佳集团股份有限公司 | Implementation method and device capable of recording liquid crystal television personalized explanation |
| CN105116787A (en) * | 2015-06-26 | 2015-12-02 | 宁波音王电声股份有限公司 | Controller of audio and video media center system |
| CN204697216U (en) * | 2015-06-30 | 2015-10-07 | 徐文波 | Video capture device |
| CN205195849U (en) * | 2015-12-07 | 2016-04-27 | 广州视源电子科技股份有限公司 | Signal transmission circuit |
| CN105491305A (en) * | 2016-01-21 | 2016-04-13 | 广州番禺职业技术学院 | Intelligent multimedia signal switching device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112788374A (en) * | 2019-11-05 | 2021-05-11 | 腾讯科技（深圳）有限公司 | Information processing method, device, equipment and storage medium |
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