CN104702823B - A kind of device and method for transferring the OSD menu in video camera - Google Patents
A kind of device and method for transferring the OSD menu in video camera Download PDFInfo
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- CN104702823B CN104702823B CN201410013592.0A CN201410013592A CN104702823B CN 104702823 B CN104702823 B CN 104702823B CN 201410013592 A CN201410013592 A CN 201410013592A CN 104702823 B CN104702823 B CN 104702823B
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Abstract
The invention discloses a kind of device for transferring the OSD menu in video camera, including the shooting generator terminal that is connected by coaxial cable and local monitor end, local monitor end includes the button of the corresponding OSD menu being sequentially connected, the first single-chip microcomputer, modulation circuit, decay isolation circuit；Shooting generator terminal includes filtering isolation circuit, Shape correction circuit, demodulator circuit, level shifting circuit, second singlechip and the video processing unit being sequentially connected.The present apparatus only needs to carry out button operation at local monitor end, and it is added to after the operation information of button is handled via the first single-chip microcomputer and modulation circuit in the vision signal of coaxial cable transmission, shooting generator terminal after filtering isolation circuit, demodulator circuit, second singlechip processing after, operation information is demodulated, and video processing unit is reached, realize single coaxial cable transmission video signal and transfer OSD menu.The invention also discloses the method for described device.
Description
Technical field
The present invention relates to technical field of video monitoring, more particularly to a kind of device for transferring the OSD menu in video camera and
Method.
Background technology
Video camera is a kind of equipment that optical image signal can be changed into electric signal, and its application scenario is a lot, is such as pacified
It is connected mounted in monitoring site, and by coaxial cable with local monitor end, the image of acquisition is converted into electric signal is transmitted back to this
Ground monitoring client is monitored.
SDI video cameras are that one kind is provided with SDI interfaces (serial digital interface, digital component serial line interface)
Video camera, its delay is small, the low, low bandwidth of encoding and decoding loss, can be imaged with real-time high-definition, is usually used in monitoring system.
For SDI video cameras, typically the working index of video camera can be adjusted by adjusting OSD menu.OSD is on-
Screen display abbreviation, i.e. screen menu type regulative mode.After usually pressing Menu keys, screen meeting pop-up display device
The rectangle menu of every reconciling items information, video camera work in every index can be carried out including image color etc. by the menu
Adjustment, so as to reach optimal use state.
At present, for most of SDI video cameras, OSD menu is transferred mainly by shooting generator terminal to local monitor end volume
Spread a cable to transmit 485 control signals, as shown in Figure 1 outside.
Transmission for vision signal, shooting generator terminal are provided with the display device being sequentially connected, monitoring device, local monitor end
Provided with SDI interface chips, the video processing module being sequentially connected.Monitoring device is connected with SDI interface chips by coaxial cable.
Vision signal is converted to electric signal by the video processing module of shooting generator terminal, and is reached via SDI interface chips on coaxial cable,
Local monitor end passes through monitoring device（Such as DVR）Receive, and show on the display device.
In addition, the transmission of the control signal for OSD menu, local monitor end is provided with the first single-chip microcomputer, 485 communication systems
Sending module, shooting generator terminal be provided with second singlechip, the receiving module of 485 communication systems.The sending module of 485 communication systems
Pass through extra with receiving module（485 cables）Connection.Local monitor end is sent via the first single-chip microcomputer by extra
The control signal of OSD menu after processing, the second singlechip for imaging generator terminal receive control signal by extra, and through place
Sent after reason to video processing module.Such a mode connects up trouble, and installation is complicated.
The content of the invention
In view of this, the present invention proposes a kind of device and method for transferring the OSD menu in video camera, to solve above-mentioned ask
Topic.
To reach above-mentioned purpose, what the technical scheme of the embodiment of the present invention was realized in：
A kind of device for transferring the OSD menu in video camera, including the shooting generator terminal that is interconnected by coaxial cable and
Local monitor end, including：
Located at the button of the corresponding OSD menu being sequentially connected electrically at local monitor end, the first single-chip microcomputer, modulation circuit, decline
Subtract isolation circuit and the filtering isolation circuit being sequentially connected electrically located at shooting generator terminal, Shape correction circuit, demodulator circuit, level
Change-over circuit, second singlechip and video processing unit；
Wherein,
First single-chip microcomputer, there is input, and the input receives the operation information of the button；And output end,
And the operation information signal output that the operation information is converted to by the output end；
Modulation circuit, there is the first signal input part, and first signal input part receives the operation information signal；
Secondary signal input, and the secondary signal input receives carrier signal input；And output end, and the output end will
The amplitude-modulated signal output that the operation information signal modulation generates to the carrier signal；
Decay isolation circuit, has input, and the input receives the amplitude-modulated signal；And output end, and institute
State output end will decay isolation after amplitude-modulated signal export to the coaxial cable, be superimposed with the vision signal generate first
Superposed signal reaches the demodulation that shooting generator terminal carries out the operation information；
Filter isolation circuit, there is input, and the input receive that the coaxial cable transmits in local monitor
First superposed signal caused by end；And output end, and the output end is folded generated after the isolation of the first superposed signal second
Plus signal exports；
Shape correction circuit, there is input, and the input inputs second superposed signal；And output
End, and the output end exports the 3rd superposed signal generated after the second superposed signal shaping；
Demodulator circuit, there is input, and the input inputs the 3rd superposed signal；And output end, and
The operation information signal output that 3rd superposed signal is demodulated to obtain by the output end；
Level shifting circuit, there is input, and the input receives the operation information signal；And output end,
And the level signal that the operation information signal is converted to by the output end exports；
Second singlechip, there is input, and the input receives the level signal；And output end, and it is described
The operation information that the level signal is converted to by output end exports；
Video processing unit, has input, and the input receives the operation information to transfer OSD menu.
Preferably, the modulation circuit includes：
There is source crystal oscillator, there is input, and the input is connected with the secondary signal input of the modulation circuit；With
And output end, and the output end is connected by second resistance with the second input of the second NAND gate；
First NAND gate, there is first input end and the second input, and the first input end and second input
End is connected with first signal input part by first resistor；And output end, and the output end and the second NAND gate
First input end connection；
Second NAND gate, there is first input end, the second input；And output end, the of the output end and OR gate
Two inputs are connected and the output end is connected with signal output part by the 4th resistance；
OR gate, there is the second input, and second input is connected with the output end of the second NAND gate；And first
Input, and the first input end is connected with first signal input part by first resistor；Output end, and the output
End is connected by 3rd resistor with signal output part.
Preferably, the device for transferring the OSD menu in video camera of the embodiment of the present invention also includes：
The power end of first NAND gate passes through the first capacity earth；
The power end of second NAND gate passes through the second capacity earth；
The power end for having source crystal oscillator passes through the 3rd capacity earth；
The power end of the OR gate passes through the 4th capacity earth.
Preferably, the decay isolation circuit includes：
4th resistance, the input of one end connection decay isolation circuit, other end ground connection；
5th electric capacity, the input of one end connection decay isolation circuit, other end ground connection；
6th electric capacity, the 5th resistance and the first magnetic bead, it is connected in series in input and the output of the decay isolation circuit
Between end.
Preferably, the filtering isolation circuit includes：
Second magnetic bead, its first end are connected with the input of the filtering isolation circuit, and the second end is connected with RL modules；
RL modules, including the first inductance and the 6th resistance being connected in parallel, its first end and the second of second magnetic bead
End connection, the second end are connected with the output end of the filtering isolation circuit；
7th electric capacity and the 8th electric capacity, the second end for being connected in series in the RL modules filter the defeated of isolation circuit with described
Go out between end.
Preferably, the Shape correction circuit includes：
First operational amplifier, there is earth terminal, power end, Enable Pin, first input end, the second input and output
End, its first input end is connected by the 7th resistance and the tenth resistance with the power end of the Shape correction circuit, Enable Pin and
Power end is connected, and the second input is connected with the input of the Shape correction circuit；Output end by the tenth electric capacity with
The output end of the Shape correction circuit is connected；
8th resistance, its first end are connected with the second input of first operational amplifier, the second end and the 7th electricity
Resistance connection；
11st resistance, it is connected between output end and the first input end of first operational amplifier；
9th resistance, its first end ground connection, the second end is connected with the second end of the 8th resistance；
9th electric capacity, its first end ground connection, the second end is connected with the second end of the 8th resistance；
12nd resistance, its first end ground connection, the second end is connected with the output end of first operational amplifier.
Preferably, the demodulator circuit includes：
First triode, its base stage are connected by the 13rd resistance with the power end of the demodulator circuit, colelctor electrode and institute
The power end connection of demodulator circuit is stated, radiation pole is connected with the input of the demodulator circuit；
Second triode, its base stage are connected with the radiation pole of the first triode, the power supply of colelctor electrode and the demodulator circuit
End connection, radiation pole are connected with the output end of the demodulator circuit；
16th resistance, its first end are connected with the radiation pole of first triode, the second end ground connection；
11st electric capacity, its first end are connected with the radiation pole of second triode, the second end ground connection；
17th resistance, its first end are connected with the radiation pole of second triode, the second end ground connection；
13rd resistance, its first end are connected with the power end of the demodulator circuit, the second end and the base of the first triode
Pole connects；
14th resistance, its first end are connected with the base stage of the first triode, the second end ground connection；
15th resistance, its first end are connected with the base stage of the first triode, the second end ground connection.
Preferably, the level shifting circuit includes：
Second operational amplifier, there is earth terminal, power end, Enable Pin, first input end, the second input and output
End, its Enable Pin are connected with power end, and first input end ground connection, the second input is turned by the 12nd electric capacity and the level
The input connection of circuit is changed, output end is connected by the 18th resistance with the output end of the level shifting circuit；
13rd electric capacity, its first end ground connection, the second end is connected with the second input of second operational amplifier；
14th electric capacity, its first end ground connection, the second end is connected with the output end of the level shifting circuit.
The embodiment of the present invention also provides a kind of method for transferring the OSD menu in video camera, for mutual by coaxial cable
In the shooting generator terminal and the device at local monitor end that are connected, including：For local monitor end step a1~a3 and be used for
Image step b1~b6 of generator terminal；Wherein,
A1, the operation information for receiving the button, the operation information signal output that the operation information is converted to；
A2, the operation information signal is received, carrier signal is received, by the operation information signal modulation to the carrier wave
The amplitude-modulated signal output of signal generation；
A3, receive the amplitude-modulated signal, the amplitude-modulated signal after the isolation that will decay exported to the coaxial cable, with it is described
Vision signal superposition the first superposed signal of generation reaches the demodulation that shooting generator terminal carries out the operation information；
B1, receive coaxial cable transmission in the first superposed signal caused by local monitor end, and by described first
The the second superposed signal output generated after superposed signal isolation；
B2, the second superposed signal is received, and the 3rd superposed signal generated after the second superposed signal shaping is exported；
B3, the 3rd superposed signal is received, and the operation information that the 3rd superposed signal is demodulated to obtain is believed
Number output；
B4, the operation information signal is received, and the level signal that the operation information signal is converted to exports；
B5, the level signal is received, the operation information that the level signal is converted to exports；
B6, the operation information is received, to transfer OSD menu.
The device for transferring the OSD menu in video camera of the present invention, both need not additionally lay cable, it is not required that taking the photograph
Camera end transfer the operation of menu, it is only necessary to button operation is carried out at local monitor end, and by the operation information of button
In the vision signal of the coaxial cable that is added to after reason transmission, after the processing of the demodulated circuit of generator terminal, second singlechip is imaged,
Operation information is demodulated, and reaches video processing unit to transfer OSD menu, while does not influence the transmission of sdi signal again, it is real
Show single coaxial cable transmission video signal and transfer OSD menu, simplify project installation.
Brief description of the drawings
Fig. 1 is a kind of device for transferring the OSD menu in SDI video cameras of the prior art；
Fig. 2 is the structure drawing of device for transferring the OSD menu in SDI video cameras of the embodiment of the present invention；
Fig. 3 is to be located locally monitoring client in the device for transferring the OSD menu in SDI video cameras of the embodiment of the present invention
Structure drawing of device；
Fig. 4 is the dress positioned at shooting generator terminal in the device for transferring the OSD menu in SDI video cameras of the embodiment of the present invention
Put structure chart；
Fig. 5 is the circuit of the modulation circuit in the device for transferring the OSD menu in SDI video cameras of the embodiment of the present invention
Figure；
Fig. 6 is the electricity of the decay isolation circuit in the device for transferring the OSD menu in SDI video cameras of the embodiment of the present invention
Lu Tu；
Fig. 7 is the electricity of the filtering isolation circuit in the device for transferring the OSD menu in SDI video cameras of the embodiment of the present invention
Lu Tu；
Fig. 8 is the electricity of the Shape correction circuit in the device for transferring the OSD menu in SDI video cameras of the embodiment of the present invention
Lu Tu；
Fig. 9 is demodulator circuit and level turn in the device for transferring the OSD menu in SDI video cameras of the embodiment of the present invention
Change the circuit diagram of circuit；
Figure 10 is the method flow diagram for transferring the OSD menu in SDI video cameras of the embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below by way of specific embodiment and join
See accompanying drawing, the present invention is described in detail.
The embodiment of the present invention, which provides one kind, need not additionally lay cable, while be operated also without in shooting generator terminal
The device for transferring the OSD menu in video camera, including the shooting generator terminal interconnected by coaxial cable and local monitor end,
As shown in Figure 2.Local monitor end and shooting generator terminal are powered by power cable.Local monitor end can be entered by plurality of devices
Row monitoring, such as SDI-DVR, it is it is known by a person skilled in the art that the present invention just repeats no more.
Local monitor end includes：The button for the corresponding OSD menu being sequentially connected electrically, the first single-chip microcomputer, modulation circuit, decay
Isolation circuit；As shown in Figure 3.
Shooting generator terminal includes：Filtering isolation circuit, Shape correction circuit, demodulator circuit, the level conversion being sequentially connected electrically
Circuit, second singlechip and video processing unit；As shown in Figure 4.
Wherein, referring to Fig. 3：
First single-chip microcomputer, there is input, and input receives the operation information of the button, and output end, and it is defeated
Go out the operation information signal output that the operation information is converted to by end.In the present embodiment, button is five to button（Upper bottom left
Right button and function key）, the OSD menu in video camera is corresponded to, is adjusted with the working index to SDI video cameras.First monolithic
Machine is converted to corresponding operation information signal output by five to the operation information of button, i.e. such as by the information of button up and down
Exported for correspondence code up and down.
Modulation circuit, there is power end, the first signal input part TxD of power supply, to receive the operation information signal, the
Binary signal input I2, to receive carrier signal input, and output end O1, by the operation information signal modulation to the load
The amplitude-modulated signal output of ripple signal generation.
The circuit diagram of modulation circuit is as shown in Figure 5.The modulation circuit includes：
There is source crystal oscillator X1, the secondary signal with earth terminal, power end, input, and input and the modulation circuit
Input I2 connections, output end, and output end are connected by second resistance R2 with the second NAND gate NAND2 the second input；
First NAND gate NAND1, there is earth terminal, power end, first input end and the second input, and first input end
It is connected with the second input with the first signal input part TxD by first resistor R1, output end, and output end and second
NAND gate NAND2 first input end connection；
Second NAND gate NAND2, there is earth terminal, power end, first input end, the second input, and output end, and it is defeated
Go out end to be connected with OR gate OR1 the second input and be connected by the 4th resistance R4 with signal output part O1；
OR gate OR1, there is earth terminal, power end, the second input, and the second input and the second NAND gate NAND2
Output end is connected, first input end, and first input end is connected with the first signal input part TxD by first resistor, defeated
Go out end, and output end is connected by 3rd resistor R3 with signal output part O1.
In addition, in order that circuit keeps stable, in the device for transferring the OSD menu in video camera of the embodiment of the present invention：
The power end of the first NAND gate NAND1 is grounded by the first electric capacity C1；
The power end of the second NAND gate NAND2 is grounded by the second electric capacity C2；
The power end for having source crystal oscillator X1 is grounded by the 3rd electric capacity C3；
The power end of the OR gate OR1 is grounded by the 4th electric capacity C4.
By this modulation circuit, at a time, when the operation information signal that the first signal input part receives is 1
When, no matter the carrier signal that secondary signal input receives is 0 or is 1, and the amplitude-modulated signal exported by signal output part is
1；When the operation information signal that the first signal input part receives is 0, if the carrier wave letter that secondary signal input receives
Number be 0, then output end output amplitude-modulated signal be 1, if secondary signal input receive carrier signal be 1, then it is defeated
The amplitude-modulated signal for going out end output is also 0.
Further, the amplitude-modulated signal amplitude generated after modulation circuit is modulated is 3.3V, and the width of SDI vision signals
Spend for 800mV, amplitude-modulated signal is directly superimposed on sdi signal, the transmission of vision signal can be influenceed, meanwhile, if directly entered
Row superposition, SDI vision signals can also influence amplitude-modulated signal, so before amplitude-modulated signal is loaded into SDI vision signals, it is also necessary to add
Add decay isolation circuit.
The isolation circuit that decays is located between the modulation circuit and the coaxial cable, after by amplitude-modulated signal decay isolation
It is loaded into the vision signal.The input I3 of the decay isolation circuit receives the amplitude-modulated signal, and output end O2
The amplitude-modulated signal after isolating that will decay exports to the coaxial cable, generates superposed signal to be superimposed with the vision signal.Decline
The circuit diagram for subtracting isolation circuit is as shown in Figure 6.
The decay isolation circuit includes：
4th resistance R4, the input I3 of one end connection decay isolation circuit, other end ground connection；
5th electric capacity C5, the input I3 of one end connection decay isolation circuit, other end ground connection；
6th electric capacity C6, the 5th resistance R5 and the first magnetic bead FB1, it is connected in series in the input of the decay isolation circuit
Between I3 and output end O2.Add the first magnetic bead FB1 again among vision signal and amplitude-modulated signal, play buffer action, to prevent
SDI vision signals flow back into modulation circuit.
The embodiment of the present invention, which also provides one kind, need not additionally lay cable, while be grasped also without in shooting generator terminal
The device for transferring the OSD menu in video camera made, for the shooting generator terminal being connected by coaxial cable with local monitor end, such as
Shown in Fig. 2 and Fig. 4, including：
The each part for imaging generator terminal is illustrated below, referring to Fig. 4.
Isolation circuit is filtered, the power end with power supply, input I4, and input I4 receives the coaxial cable transmission
In the first superposed signal caused by local monitor end, and output end O3, and after output end O3 isolates the first superposed signal
Second superposed signal output of generation.
Before the first superposed signal for being arranged on demodulator circuit and receiving coaxial cable of filtering isolation circuit, in order to be superimposed upon
Amplitude-modulated signal in SDI vision signals extracts, while prevents 1.485G SDI vision signals from disturbing demodulator circuit, influences
Signal demodulates.The circuit structure diagram for filtering isolation circuit is as shown in Figure 7.
The filtering isolation circuit includes：
In order that isolation effect is more preferable, the magnetic bead FB2 and FB3 of two series connection are set, in the present embodiment, the second magnetic bead FB2
The second end be connected with the 3rd magnetic bead FB3 first end, the second magnetic bead FB2 first end with it is described filtering isolation circuit input
I4 connections are held, the 3rd magnetic bead FB3 the second end is connected with RL modules；
RL modules, including the first inductance L1 being connected in parallel and the 6th resistance R6, its first end and the 3rd magnetic bead FB3
The second end connection, the second end pass through the 7th electric capacity C7 and the 8th electric capacity C8 with it is described filtering isolation circuit output end O3 connect
Connect.
Wherein, the setting of RL modules can play the function of filtering SDI vision signals, i.e. buffer action.7th electric capacity C7
With the 8th electric capacity C8 setting, blocking can be played a part of, suitable quiescent point is provided for circuit.
Then, after isolation circuit after filtering, it is also necessary to Shape correction is carried out to signal, by irregular input waveform
The output waveform of rule is shaped as, so that demodulator circuit more stably demodulates operation information signal, in filtering isolation circuit
Shape correction circuit is additionally provided between demodulator circuit.
The Shape correction circuit has the power end of power supply, input I5, and input I5 makes the second superposition letter
Number input, and output end DAT, and output end DAT is defeated by the 3rd superposed signal generated after the second superposed signal shaping
Go out.The circuit structure diagram of Shape correction circuit is as shown in Figure 8.
The Shape correction circuit includes：
First operational amplifier QA1, there is earth terminal, power end, Enable Pin, first input end, the second input and defeated
Go out end, its first input end is connected by the power end 3.3V of the 7th resistance R7 and the tenth resistance R10 and the Shape correction circuit
Connect, Enable Pin is connected with power end, and the second input is connected with the input I5 of the Shape correction circuit；Output end is led to
The output end DAT that the tenth electric capacity C10 is crossed with the Shape correction circuit is connected；
8th resistance R8, its first end are connected with the second input+IN of the first operational amplifier QA1, the second end
It is connected with the 7th resistance R7；
11st resistance R11, be connected to the first operational amplifier QA1 output end OUT and first input end-IN it
Between；
9th resistance R9, its first end ground connection, the second end is connected with the 8th resistance R8 the second end；
9th electric capacity C9, its first end ground connection, the second end is connected with the 8th resistance R8 the second end；
12nd resistance R12, its first end ground connection, the second end and the output end OUT of the first operational amplifier QA1 connect
Connect.
Demodulator circuit, there is the power end of power supply, input DAT, and input DAT makes the 3rd superposed signal defeated
Enter, and output end O4, and the operation information signal output that the 3rd superposed signal is demodulated to obtain by output end O4.
The circuit diagram of demodulator circuit is as shown in Figure 9.
The demodulator circuit includes：
First triode QN1, its base stage are connected by the 13rd resistance R13 with the power end of the demodulator circuit, current collection
Pole is connected with the power end of the demodulator circuit, and radiation pole is connected with the input DAT of the demodulator circuit；
Second triode QN2, its base stage are connected with the first triode QN1 radiation pole, colelctor electrode and the demodulator circuit
Power end connection, radiation pole be connected with the output end O4 of the demodulator circuit；
16th resistance R16, its first end are connected with the radiation pole of the first triode QN1, the second end ground connection；
11st electric capacity C11, its first end are connected with the radiation pole of the second triode QN2, the second end ground connection；
17th resistance R17, its first end are connected with the radiation pole of the second triode QN2, the second end ground connection；
13rd resistance R13, its first end are connected with the power end of the demodulator circuit, the second end and the first triode
QN1 base stage connection；
14th resistance R14, its first end are connected with the first triode QN1 base stage, the second end ground connection；
15th resistance R15, its first end are connected with the first triode QN1 base stage, the second end ground connection.
Further, the amplitude very little of demodulated obtained operation information signal, second singlechip None- identified, so
Also need to set level shifting circuit, to play amplification.More specifically, the obtained amplitude of operation information signal is demodulated
For hundreds of mV, and the signal amplitude that second singlechip can recognize is 3.3V.Level shifting circuit is played hundreds of mV's
Operation information signal is converted into 3.3V level signal output, so that second singlechip identifies.
The level shifting circuit, there is input I6, and input I6 is receiving the input of the operation information signal
The output end that the level signal for holding I6, and output end O5, and output end O5 to be converted to the operation information signal exports
O5。
The second singlechip receives the level signal by its input I6, and the level signal is converted into
Exported after corresponding operation information by its output end O5.
The circuit structure diagram of level shifting circuit is as shown in Figure 9.
The level shifting circuit includes：
Second operational amplifier QA2, there is earth terminal, power end, Enable Pin, first input end, the second input and defeated
Go out end, its Enable Pin is connected with power end, and first input end is grounded, the second input by the 12nd electric capacity C12 with it is described
The input I6 connections of level shifting circuit, output end are connected by the output end O5 of the 18th resistance and the level shifting circuit
Connect；
13rd electric capacity C13, its first end ground connection, the second end and the second input of the second operational amplifier QA2
Connection；
14th electric capacity C14, its first end ground connection, the second end is connected with the output end O5 of the level shifting circuit.
Its principle is relatively acted on by operational amplifier QA2 voltage ratio, by by operation information signal and low level phase
Compare, i.e. two input difference input operation information signals and ground connection（That is low level 0）, by the operation that amplitude is hundreds of mV
The level signal that information signal output amplitude after compared with zero level is 3.3V, so that second singlechip identifies.
Second singlechip, there is input, and input receives the operation information signal；And output end, and export
The operation information that the operation information signal is converted to by end exports；
Video processing unit, have and receive the operation information to transfer the input of OSD menu.
The embodiment of the present invention also provides a kind of method for transferring the OSD menu in video camera, for being connected by coaxial cable
In the shooting generator terminal and the device at local monitor end that connect, as shown in Figure 10, including：For local monitor end step a1~a3 with
And for imaging step b1~b6 of generator terminal；Wherein,
A1, the operation information for receiving the button, the operation information signal output that the operation information is converted to；
A2, the operation information signal is received, carrier signal is received, by the operation information signal modulation to the carrier wave
The amplitude-modulated signal output of signal generation；
A3, receive the amplitude-modulated signal, the amplitude-modulated signal after the isolation that will decay exported to the coaxial cable, with it is described
Vision signal superposition the first superposed signal of generation reaches the demodulation that shooting generator terminal carries out the operation information；
B1, receive coaxial cable transmission in the first superposed signal caused by local monitor end, and by described first
The the second superposed signal output generated after superposed signal isolation.
After step b1, it is also necessary to carry out Shape correction to signal, irregular input waveform is shaped as into rule
Output waveform so that demodulator circuit more stably demodulates operation information signal.So after step b1：
B2, the second superposed signal is received, and the 3rd superposed signal generated after the second superposed signal shaping is exported.
B3, the 3rd superposed signal is received, and the operation information that the 3rd superposed signal is demodulated to obtain is believed
Number output.
Further, the amplitude very little of demodulated obtained operation information signal, second singlechip None- identified, so
Also need to set level shifting circuit, to play amplification.More specifically, the obtained amplitude of operation information signal is demodulated
For 800mV, and second singlechip needs the signal that amplitude is 3.3V.Level shifting circuit is played 800mV operation information
Signal is converted into 3.3V level signal output, so that second singlechip identifies.After step b3, in addition to：
B4, the operation information signal is received, and the level signal that the operation information signal is converted to exports；
B5, the level signal is received, the operation information that the level signal is converted to exports；
B6, the operation information is received, to transfer OSD menu.
Wherein, step a1-a3 is used for local monitor end, and step b1-b6 is used to image generator terminal.
The device for transferring the OSD menu in video camera of the embodiment of the present invention, both need not additionally lay cable, also be not required to
Transfer the operation of menu in shooting generator terminal, it is only necessary to carry out button operation at local monitor end, and by the operation of button
In the vision signal of the coaxial cable that is added to after information processing transmission, in shooting generator terminal demodulated circuit, second singlechip
After processing, video processing unit is reached to transfer OSD menu, while does not influence the transmission of sdi signal again, realizes single coaxial electricity
Cable transmission video signal and transfer OSD menu, simplify project installation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements done etc., should be included within the scope of protection of the invention with principle.
Claims (8)
1. a kind of device for transferring the OSD menu in video camera, including the shooting generator terminal and sheet interconnected by coaxial cable
Ground monitoring client, it is characterised in that including：
Located at the button of the corresponding OSD menu being sequentially connected electrically at local monitor end, the first single-chip microcomputer, modulation circuit, decay every
The filtering isolation circuit being sequentially connected electrically, Shape correction circuit, demodulator circuit, level conversion from circuit and located at shooting generator terminal
Circuit, second singlechip and video processing unit；
Wherein,
First single-chip microcomputer, there is input, and the input receives the operation information of button；And output end, and it is described defeated
Go out the operation information signal output that the operation information is converted to by end；
Modulation circuit, there is the first signal input part, and first signal input part receives the operation information signal；Second
Signal input part, and the secondary signal input receives carrier signal input；And output end, and the output end is by described in
The amplitude-modulated signal output that operation information signal modulation generates to the carrier signal；
Decay isolation circuit, has input, and the input receives the amplitude-modulated signal；And output end, and it is described defeated
The amplitude-modulated signal after isolating that goes out to hold to decay exports to the coaxial cable, generates the first superposed signal to be superimposed with vision signal
Reach the demodulation that shooting generator terminal carries out the operation information；Wherein, the decay isolation circuit includes：4th resistance, one end connect
Connect the input of the decay isolation circuit, other end ground connection；5th electric capacity, the input of one end connection decay isolation circuit
End, other end ground connection；6th electric capacity, it is connected between input and the output end of the decay isolation circuit；
Isolation circuit is filtered, there is input, and the input receives being produced at local monitor end for the coaxial cable transmission
The first raw superposed signal；And output end, and the output end believes the second superposition generated after the isolation of the first superposed signal
Number output；
Shape correction circuit, there is input, and the input inputs second superposed signal；And output end, and
The output end exports the 3rd superposed signal generated after the second superposed signal shaping；
Demodulator circuit, there is input, and the input inputs the 3rd superposed signal；And output end, and it is described
The operation information signal output that 3rd superposed signal is demodulated to obtain by output end；
Level shifting circuit, there is input, and the input receives the operation information signal；And output end, and institute
The level signal that the operation information signal is converted to by output end is stated to export；
Second singlechip, there is input, and the input receives the level signal；And output end, and the output
The operation information that the level signal is converted to by end exports；
Video processing unit, has input, and the input receives the operation information to transfer OSD menu.
2. the device according to claim 1 for transferring the OSD menu in video camera, it is characterised in that the modulation circuit
Including：
There is source crystal oscillator, there is input, and the input is connected with the secondary signal input of the modulation circuit；It is and defeated
Go out end, and the output end is connected by second resistance with the second input of the second NAND gate；
First NAND gate, there is first input end and the second input, and the first input end and second input are equal
It is connected with first signal input part by first resistor；And output end, and the of the output end and the second NAND gate
One input connects；
Second NAND gate, there is first input end, the second input；And output end, the second of the output end and OR gate are defeated
Enter end connection and the output end is connected with signal output part by the 4th resistance；
OR gate, there is the second input, and second input is connected with the output end of the second NAND gate；And first input
End, and the first input end is connected with first signal input part by first resistor；Output end, and the output end is led to
3rd resistor is crossed to be connected with signal output part.
3. the device according to claim 2 for transferring the OSD menu in video camera, it is characterised in that the modulation circuit
In,
The power end of first NAND gate passes through the first capacity earth；
The power end of second NAND gate passes through the second capacity earth；
The power end for having source crystal oscillator passes through the 3rd capacity earth；
The power end of the OR gate passes through the 4th capacity earth.
4. the device according to claim 1 for transferring the OSD menu in video camera, it is characterised in that the filtering isolation
Circuit includes：
Second magnetic bead, its first end are connected with the input of the filtering isolation circuit, and the second end is connected with RL modules；
RL modules, including the first inductance and the 6th resistance being connected in parallel, its first end and the second end of second magnetic bead connect
Connect, the second end is connected with the output end of the filtering isolation circuit；
7th electric capacity and the 8th electric capacity, it is connected in series in the second end and the output end of the filtering isolation circuit of the RL modules
Between.
5. the device according to claim 1 for transferring the OSD menu in video camera, it is characterised in that the Shape correction
Circuit includes：
First operational amplifier, there is earth terminal, power end, Enable Pin, first input end, the second input and output end, its
First input end is connected by the 7th resistance and the tenth resistance with the power end of the Shape correction circuit, Enable Pin and power end
It is connected, the second input is connected with the input of the Shape correction circuit；Output end by the tenth electric capacity with it is described whole
The output end of shape process circuit is connected；
8th resistance, its first end are connected with the second input of first operational amplifier, and the second end connects with the 7th resistance
Connect；
11st resistance, it is connected between output end and the first input end of first operational amplifier；
9th resistance, its first end ground connection, the second end is connected with the second end of the 8th resistance；
9th electric capacity, its first end ground connection, the second end is connected with the second end of the 8th resistance；
12nd resistance, its first end ground connection, the second end is connected with the output end of first operational amplifier.
6. the device according to claim 1 for transferring the OSD menu in video camera, it is characterised in that the demodulator circuit
Including：
First triode, its base stage are connected by the 13rd resistance with the power end of the demodulator circuit, colelctor electrode and the solution
The power end connection of circuit is adjusted, radiation pole is connected with the input of the demodulator circuit；
Second triode, its base stage are connected with the radiation pole of the first triode, and the power end of colelctor electrode and the demodulator circuit connects
Connect, radiation pole is connected with the output end of the demodulator circuit；
16th resistance, its first end are connected with the radiation pole of first triode, the second end ground connection；
11st electric capacity, its first end are connected with the radiation pole of second triode, the second end ground connection；
17th resistance, its first end are connected with the radiation pole of second triode, the second end ground connection；
13rd resistance, its first end are connected with the power end of the demodulator circuit, and the second end and the base stage of the first triode connect
Connect；
14th resistance, its first end are connected with the base stage of the first triode, the second end ground connection；
15th resistance, its first end are connected with the base stage of the first triode, the second end ground connection.
7. the device according to claim 1 for transferring the OSD menu in video camera, it is characterised in that the level conversion
Circuit includes：
Second operational amplifier, there is earth terminal, power end, Enable Pin, first input end, the second input and output end, its
Enable Pin is connected with power end, and first input end ground connection, the second input passes through the 12nd electric capacity and level conversion electricity
The input connection on road, output end are connected by the 18th resistance with the output end of the level shifting circuit；
13rd electric capacity, its first end ground connection, the second end is connected with the second input of second operational amplifier；
14th electric capacity, its first end ground connection, the second end is connected with the output end of the level shifting circuit.
A kind of 8. method for transferring the OSD menu in video camera, it is characterised in that taken the photograph for what is interconnected by coaxial cable
In the device at camera end and local monitor end, including：For the step a1~a3 at local monitor end and for imaging generator terminal
Step b1~b6；Wherein,
A1, the operation information for receiving button, the operation information signal output that the operation information is converted to；
A2, the operation information signal is received, carrier signal is received, by the operation information signal modulation to the carrier signal
The amplitude-modulated signal output of generation；
A3, receive the amplitude-modulated signal, the amplitude-modulated signal after the isolation that will decay exported to the coaxial cable, with vision signal
Superposition the first superposed signal of generation reaches the demodulation that shooting generator terminal carries out the operation information；
B1, receive being superimposed in the first superposed signal caused by local monitor end, and by described first for the coaxial cable transmission
The the second superposed signal output generated after signal isolation；
B2, the second superposed signal is received, and the 3rd superposed signal generated after the second superposed signal shaping is exported；
B3, the 3rd superposed signal is received, and the operation information signal that the 3rd superposed signal is demodulated to obtain is defeated
Go out；
B4, the operation information signal is received, and the level signal that the operation information signal is converted to exports；
B5, the level signal is received, the operation information that the level signal is converted to exports；
B6, the operation information is received, to transfer OSD menu.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410013592.0A CN104702823B (en) | 2014-01-13 | 2014-01-13 | A kind of device and method for transferring the OSD menu in video camera |
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| CN201410013592.0A CN104702823B (en) | 2014-01-13 | 2014-01-13 | A kind of device and method for transferring the OSD menu in video camera |
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| CN104702823A CN104702823A (en) | 2015-06-10 |
| CN104702823B true CN104702823B (en) | 2018-01-26 |
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| JP3125552B2 (en) * | 1993-12-28 | 2001-01-22 | 三菱電機株式会社 | Video conference system |
| JP2010219668A (en) * | 2009-03-13 | 2010-09-30 | Victor Co Of Japan Ltd | Video transmission system and monitoring system |
| CN202261615U (en) * | 2011-07-01 | 2012-05-30 | 毛振刚 | Intelligent HD network high speed ball |
| CN102438127B (en) * | 2011-10-08 | 2014-11-26 | 杭州海康威视数字技术股份有限公司 | Monitoring device, monitoring system and monitoring method supporting hybrid access |
| CN203722741U (en) * | 2014-01-13 | 2014-07-16 | 杭州海康威视数字技术股份有限公司 | Apparatus of taking OSD menu in camera |
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