CN203722741U - Apparatus of taking OSD menu in camera - Google Patents
Apparatus of taking OSD menu in camera Download PDFInfo
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- CN203722741U CN203722741U CN201420019575.3U CN201420019575U CN203722741U CN 203722741 U CN203722741 U CN 203722741U CN 201420019575 U CN201420019575 U CN 201420019575U CN 203722741 U CN203722741 U CN 203722741U
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Abstract
The utility model discloses an apparatus of taking an OSD menu in a camera. The apparatus comprises a camera end and a local monitoring end which are connected through a coaxial cable. The local monitoring end comprises a button corresponding to the OSD menu, a first single-chip microcomputer, an amplitude modulation circuit and an attenuation isolation circuit which are successively connected. The camera end comprises a filtering isolation circuit, a shaping processing circuit, a demodulation circuit, a level conversion circuit, a second single-chip microcomputer and a video processing unit which are successively connected. According to the apparatus, only button operation needs to be performed on the local monitoring end and operation information of the button is processed by the first single-chip microcomputer and the amplitude modulation circuit and then is superposed to a video signal transmitted by the coaxial cable; after being processed by the filtering isolation circuit, the demodulation circuit and the second single-chip microcomputer on the camera end, the operation information is demodulated and is transmitted to the video processing unit; the single coaxial cable can be used to transmit the video signal and take the OSD menu.
Description
Technical field
The utility model relates to technical field of video monitoring, relates in particular to a kind of device of transferring the OSD menu in video camera.
Background technology
Video camera is a kind ofly optical image signal can be changed into the equipment of the signal of telecommunication, its application scenario is a lot, as be arranged on monitoring site, and and be connected with local monitor end by coaxial cable, convert the image of acquisition to the signal of telecommunication and be transmitted back to local monitor and bring in and monitor.
SDI video camera is the video camera of a kind of SDI of being provided with interface (serial digital interface, digital component serial line interface), and its delay is little, encoding and decoding loss is low, low bandwidth, high-definition camera in real time, is usually used in supervisory control system.
For SDI video camera, generally can be by regulating OSD menu to regulate the working index of video camera.OSD is the abbreviation of on-screen display, i.e. screen menu type regulative mode.Be generally to press after Menu key, screen can eject the rectangle menu of every reconciling items information of display, can to video camera work in every index, comprise that image color etc. adjusts by this menu, thereby reach best use state.
At present, for most of SDI video cameras, transfer OSD menu and mainly have two kinds of modes: a kind of is by 485 keyboards, in this locality, to transfer OSD menu, need to local monitor end, additionally spread twisted-pair feeder at video camera end and transmit 485 control signals under which, wiring trouble, as shown in Figure 1; Another mode is directly at video camera end, by five, to button, to transfer OSD menu, can not directly transfer at local monitor end, for outdoor dome type camera, even needing to climb to video camera end will transfer menu by button after ball cover dismounting, complex operation, as shown in Figure 2.Two kinds of modes are complex operation in actual use all, installs complicated.
Utility model content
In view of this, the utility model proposes a kind of device of transferring the OSD menu in video camera, to address the above problem.
For achieving the above object, the technical scheme of the utility model embodiment is achieved in that
Transfer a device for the OSD menu in video camera, comprise by the interconnected video camera end of coaxial cable and local monitor end, comprising:
Be located at button, the first single-chip microcomputer, modulation circuit, the decay buffer circuit of the corresponding OSD menu being electrically connected to successively of local monitor end; With the filtering buffer circuit, Shape correction circuit, demodulator circuit, level shifting circuit, second singlechip and the video processing unit that are electrically connected to successively of being located at video camera end;
Wherein,
The first single-chip microcomputer, has input, and described input receives the operation information of described button; And output, and the operation information signal that described output is converted to described operation information is exported;
Modulation circuit, has first signal input, and described first signal input receives described operation information signal; Secondary signal input, and the input of described secondary signal input reception carrier signal; And output, and described output is modulated to by described operation information signal the amplitude-modulated signal output that described carrier signal generates;
Decay buffer circuit, have input, and described input receives described amplitude-modulated signal; And output, and described output exports the amplitude-modulated signal after decay isolation described coaxial cable to, to generate the first superposed signal with described vision signal stack, reaches the demodulation that video camera end carries out described operation information;
Filtering buffer circuit, has input, and described input receives first superposed signal producing at local monitor end of described coaxial cable transmission; And output, and described output is by the second superposed signal output generating after the first superposed signal isolation;
Shape correction circuit, has input, and described input makes described the second superposed signal input; And output, and described output is by the 3rd superposed signal output generating after described the second superposed signal shaping;
Demodulator circuit, has input, and described input makes described the 3rd superposed signal input; And output, and the described operation information signal that described output obtains described the 3rd superposed signal demodulation is exported;
Level shifting circuit, has input, and described input receives described operation information signal; And output, and the level signal that described output is converted to described operation information signal is exported;
Second singlechip, has input, and described input receives described level signal; And output, and the operation information that described output is converted to described level signal is exported;
Video processing unit, has input, and described input receives described operation information to transfer OSD menu.
Preferably, described modulation circuit comprises:
Active crystal oscillator, has input, and described input is connected with the secondary signal input of described modulation circuit; And output, and described output is connected with the second input of the second NAND gate by the second resistance;
The first NAND gate, has first input end and the second input, and described first input end is all connected by the first resistance with described first signal input with described the second input; And output, and described output is connected with the first input end of the second NAND gate;
The second NAND gate, has first input end, the second input; And output, described output with or the second input of door be connected and described output is connected by the 4th resistance with signal output part;
Or door, there is the second input, and described the second input is connected with the output of the second NAND gate; And first input end, and described first input end is connected by the first resistance with described first signal input; Output, and described output is connected with signal output part by the 3rd resistance.
Preferably, the device of transferring the OSD menu in video camera of the utility model embodiment also comprises:
The power end of described the first NAND gate is by the first capacity earth;
The power end of described the second NAND gate is by the second capacity earth;
The power end of described active crystal oscillator is by the 3rd capacity earth;
Power end described or door passes through the 4th capacity earth.
Preferably, described decay buffer circuit comprises:
The 4th resistance, one end connects the input of described decay buffer circuit, other end ground connection;
The 5th electric capacity, one end connects the input of described decay buffer circuit, other end ground connection;
The 6th electric capacity, the 5th resistance and the first magnetic bead, be connected in series between the input and output of described decay buffer circuit.
Preferably, described filtering buffer circuit comprises:
The second magnetic bead, its first end is connected with the input of described filtering buffer circuit, and the second end is connected with RL module;
RL module, comprises the first inductance and the 6th resistance that are connected in parallel, and its first end is connected with the second end of described the second magnetic bead, and the second end is connected with the output of described filtering buffer circuit;
The 7th electric capacity and the 8th electric capacity, be connected in series between the second end of described RL module and the output of described filtering buffer circuit.
Preferably, described Shape correction circuit comprises:
The first operational amplifier, there is earth terminal, power end, Enable Pin, first input end, the second input and output, its first input end is connected with the power end of described Shape correction circuit with the tenth resistance by the 7th resistance, Enable Pin is connected with power end, and the second input is connected with the input of described Shape correction circuit; Output is connected with the output of described Shape correction circuit by the tenth electric capacity;
The 8th resistance, its first end is connected with the second input of described the first operational amplifier, and the second end is connected with the 7th resistance;
The 11 resistance, is connected between the output and first input end of described the first operational amplifier;
The 9th resistance, its first end ground connection, the second end is connected with the second end of the 8th resistance;
The 9th electric capacity, its first end ground connection, the second end is connected with the second end of the 8th resistance;
The 12 resistance, its first end ground connection, the second end is connected with the output of described the first operational amplifier.
Preferably, described demodulator circuit comprises:
The first triode, its base stage is connected with the power end of described demodulator circuit by the 13 resistance, and collector electrode is connected with the power end of described demodulator circuit, and the radiation utmost point is connected with the input of described demodulator circuit;
The second triode, its base stage is connected with the radiation utmost point of the first triode, and collector electrode is connected with the power end of described demodulator circuit, and the radiation utmost point is connected with the output of described demodulator circuit;
The 16 resistance, its first end is connected with the radiation utmost point of described the first triode, the second end ground connection;
The 11 electric capacity, its first end is connected with the radiation utmost point of described the second triode, the second end ground connection;
The 17 resistance, its first end is connected with the radiation utmost point of described the second triode, the second end ground connection;
The 13 resistance, its first end is connected with the power end of described demodulator circuit, and the second end is connected with the base stage of the first triode;
The 14 resistance, its first end is connected with the base stage of the first triode, the second end ground connection;
The 15 resistance, its first end is connected with the base stage of the first triode, the second end ground connection.
Preferably, described level shifting circuit comprises:
The second operational amplifier, there is earth terminal, power end, Enable Pin, first input end, the second input and output, its Enable Pin is connected with power end, first input end ground connection, the second input is connected with the input of described level shifting circuit by the 12 electric capacity, and output is connected with the output of described level shifting circuit by the 18 resistance;
The 13 electric capacity, its first end ground connection, the second end is connected with the second input of described the second operational amplifier;
The 14 electric capacity, its first end ground connection, the second end is connected with the output of described level shifting circuit.
The device of transferring the OSD menu in video camera of the present utility model, neither need additionally to lay cable, need to not transfer at video camera end the operation of menu yet, only need to carry out button operation at local monitor end, and in the vision signal of the coaxial cable transmission that is added to after the operation information of button is processed, at video camera end process demodulator circuit, after the processing of second singlechip, operation information is demodulated, and reach video processing unit to transfer OSD menu, do not affect again the transmission of sdi signal simultaneously, realize single coaxial cable transmission video signal and transfer OSD menu, simplify project installation.
Accompanying drawing explanation
Fig. 1 is a kind of device of transferring the OSD menu in SDI video camera of the prior art;
Fig. 2 is the device that another kind of the prior art is transferred the OSD menu in SDI video camera;
Fig. 3 is the schematic diagram of device of transferring the OSD menu in SDI video camera of the utility model embodiment;
Fig. 4 is the device concrete structure figure that transfers the OSD menu in SDI video camera of the utility model embodiment;
Fig. 5 is the circuit diagram of the modulation circuit in the device of transferring the OSD menu in SDI video camera of the utility model embodiment;
Fig. 6 is the circuit diagram of the decay buffer circuit in the device of transferring the OSD menu in SDI video camera of the utility model embodiment;
Fig. 7 is the circuit diagram of the filtering buffer circuit in the device of transferring the OSD menu in SDI video camera of the utility model embodiment;
Fig. 8 is the circuit diagram of the Shape correction circuit in the device of transferring the OSD menu in SDI video camera of the utility model embodiment;
Fig. 9 is demodulator circuit in the device of transferring the OSD menu in SDI video camera of the utility model embodiment and the circuit diagram of level shifting circuit.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below, by specific embodiment and referring to accompanying drawing, the utility model is elaborated.
The utility model embodiment provides a kind of cable that do not need additionally to lay, the device of transferring the OSD menu in video camera that also need to not operate at video camera end simultaneously, comprise by the interconnected video camera end of coaxial cable and local monitor end, as shown in Figure 3 and Figure 4.Local monitor end and video camera end are all powered by power cable.Local monitor end can be monitored by plurality of devices, as SDI-DVR etc., all known to those skilled in the art, just the utility model repeats no more.
Local monitor end comprises: button, the first single-chip microcomputer, modulation circuit, the decay buffer circuit of the corresponding OSD menu being electrically connected to successively;
Video camera end comprises: the filtering buffer circuit, Shape correction circuit, demodulator circuit, level shifting circuit, second singlechip and the video processing unit that are electrically connected to successively;
Wherein,
The first single-chip microcomputer, has input, and input receives the operation information of described button, and output, and output operation information signal output that described operation information is converted to.In the present embodiment, button is five to button (key and function key up and down), and the OSD menu in corresponding video camera, to adjust the working index of SDI video camera.The first single-chip microcomputer is converted to the output of corresponding operation information signal by five operation informations to button, that is, and and as the information of button is up and down exported for correspondence code up and down.
Modulation circuit, has power end, the first signal input TxD of power supply, to receive described operation information signal, secondary signal input I2, with the input of reception carrier signal, and output O1, described operation information signal is modulated to the amplitude-modulated signal output that described carrier signal generates.
The circuit diagram of modulation circuit as shown in Figure 5.Described modulation circuit comprises:
Active crystal oscillator X1, has earth terminal, power end, and input, and input is connected with the secondary signal input I2 of described modulation circuit, output, and output is connected with the second input of the second NAND gate NAND2 by the second resistance R 2;
The first NAND gate NAND1, has earth terminal, power end, first input end and the second input, and first input end is all connected by the first resistance R 1 with described first signal input TxD with the second input, output, and output is connected with the first input end of the second NAND gate NAND2;
The second NAND gate NAND2, has earth terminal, power end, first input end, the second input, and output, and output with or door OR1 the second input be connected and be connected by the 4th resistance R 4 with signal output part O1;
Or door OR1, there is earth terminal, power end, the second input, and the second input is connected with the output of the second NAND gate NAND2, first input end, and first input end is connected by the first resistance with described first signal input TxD, output, and output is connected with signal output part O1 by the 3rd resistance R 3.
In addition, in order to make circuit keep stable, in the device of transferring the OSD menu in video camera of the utility model embodiment:
The power end of described the first NAND gate NAND1 is by the first capacitor C 1 ground connection;
The power end of described the second NAND gate NAND2 is by the second capacitor C 2 ground connection;
The power end of described active crystal oscillator X1 is by the 3rd capacitor C 3 ground connection;
Power end described or door OR1 passes through the 4th capacitor C 4 ground connection.
By this modulation circuit, at a time, when the described operation information signal receiving when first signal input is 1, the carrier signal no matter secondary signal input receives is 0 to be still 1, and the amplitude-modulated signal of exporting by signal output part is 1; When the described operation information signal of first signal input reception is 0, if the carrier signal that secondary signal input receives is 0, the amplitude-modulated signal of output output is 1 so, if the carrier signal that secondary signal input receives is 1, the amplitude-modulated signal of output output is also 0 so.
Further, the amplitude-modulated signal amplitude generating after modulation circuit modulation is 3.3V, and the amplitude of SDI vision signal is 800mV, amplitude-modulated signal is directly added on sdi signal, can affects the transmission of vision signal, simultaneously, if directly superposeed, SDI vision signal also can affect amplitude-modulated signal, so before amplitude-modulated signal is loaded into SDI vision signal, also need to add decay buffer circuit.
Decay buffer circuit is located between described modulation circuit and described coaxial cable, will after amplitude-modulated signal decay isolation, be loaded in described vision signal.The input I3 of described decay buffer circuit receives described amplitude-modulated signal, and output O2 by the amplitude-modulated signal after decay isolation export described coaxial cable to, to generate superposed signal with described vision signal stack.The circuit diagram of decay buffer circuit as shown in Figure 6.
Described decay buffer circuit comprises:
The 4th resistance R 4, one end connects the input I3 of decay buffer circuit, other end ground connection;
The 5th capacitor C 5, one end connects the input I3 of decay buffer circuit, other end ground connection;
The 6th capacitor C 6, the 5th resistance R 5 and the first magnetic bead FB1, be connected in series between the input I3 and output O2 of described decay buffer circuit.In the middle of vision signal and amplitude-modulated signal, add again the first magnetic bead FB1, play buffer action, in case SDI vision signal flows back into modulation circuit.
Utility model is following to be described each part of video camera end.
Filtering buffer circuit, the power end with power supply, input I4, and input I4 receives first superposed signal producing at local monitor end of described coaxial cable transmission, and output O3, and output O3 is by described the second superposed signal output generating after the first superposed signal isolation.
Before first superposed signal that is arranged on demodulator circuit reception coaxial cable of filtering buffer circuit, for the amplitude-modulated signal being superimposed upon in SDI vision signal is extracted, prevent that the SDI vision signal of 1.485G from disturbing demodulator circuit simultaneously, affect signal demodulation.The circuit structure diagram of filtering buffer circuit as shown in Figure 7.
Described filtering buffer circuit comprises:
In order to make isolation effect better, magnetic bead FB2 and the FB3 of two series connection are set, in the present embodiment, the second end of the second magnetic bead FB2 is connected with the first end of the 3rd magnetic bead FB3, the first end of the second magnetic bead FB2 is connected with the input I4 of described filtering buffer circuit, and the second end of the 3rd magnetic bead FB3 is connected with RL module;
RL module, comprises the first inductance L 1 and the 6th resistance R 6 that are connected in parallel, and its first end is connected with the second end of described the 3rd magnetic bead FB3, and the second end is connected with the output O3 of described filtering buffer circuit with the 8th capacitor C 8 by the 7th capacitor C 7.
Wherein, arranging of RL module can be played the function of filtering SDI vision signal, i.e. buffer action.The setting of the 7th capacitor C 7 and the 8th capacitor C 8, can play every straight effect, for circuit provides suitable quiescent point.
Then, after buffer circuit after filtering, also need signal to carry out Shape correction, irregular input waveform is shaped as to regular output waveform, so that demodulator circuit more stably demodulates operation information signal, between filtering buffer circuit and demodulator circuit, be also provided with Shape correction circuit.
The output of described filtering buffer circuit is connected with the input I5 of described Shape correction circuit;
Described Shape correction circuit has power end, the input I5 of power supply, and input I5 makes described the second superposed signal input, and output DAT, and output DAT is by the 3rd superposed signal output generating after described the second superposed signal shaping.The circuit structure diagram of Shape correction circuit as shown in Figure 8.
Described Shape correction circuit comprises:
The first operational amplifier QA1, there is earth terminal, power end, Enable Pin, first input end, the second input and output, its first input end is connected with the power end 3.3V of described Shape correction circuit with the tenth resistance R 10 by the 7th resistance R 7, Enable Pin is connected with power end, and the second input is connected with the input I5 of described Shape correction circuit; Output is connected with the output DAT of described Shape correction circuit by the tenth capacitor C 10;
The 8th resistance R 8, its first end is connected with the second input+IN of described the first operational amplifier QA1, and the second end is connected with the 7th resistance R 7;
The 11 resistance R 11, is connected between the output OUT and first input end-IN of described the first operational amplifier QA1;
The 9th resistance R 9, its first end ground connection, the second end is connected with the second end of the 8th resistance R 8;
The 9th capacitor C 9, its first end ground connection, the second end is connected with the second end of the 8th resistance R 8;
The 12 resistance R 12, its first end ground connection, the second end is connected with the output OUT of described the first operational amplifier QA1.
Demodulator circuit, has the power end of power supply, input DAT, and input DAT makes described the 3rd superposed signal input, and output O4, and output O4 described operation information signal output that described the 3rd superposed signal demodulation is obtained.
The circuit diagram of demodulator circuit as shown in Figure 9.
Described demodulator circuit comprises:
The first triode QN1, its base stage is connected with the power end of described demodulator circuit by the 13 resistance R 13, and collector electrode is connected with the power end of described demodulator circuit, and the radiation utmost point is connected with the input DAT of described demodulator circuit;
The second triode QN2, its base stage is connected with the radiation utmost point of the first triode QN1, and collector electrode is connected with the power end of described demodulator circuit, and the radiation utmost point is connected with the output O4 of described demodulator circuit;
The 16 resistance R 16, its first end is connected with the radiation utmost point of described the first triode QN1, the second end ground connection;
The 11 capacitor C 11, its first end is connected with the radiation utmost point of described the second triode QN2, the second end ground connection;
The 17 resistance R 17, its first end is connected with the radiation utmost point of described the second triode QN2, the second end ground connection;
The 13 resistance R 13, its first end is connected with the power end of described demodulator circuit, and the second end is connected with the base stage of the first triode QN1;
The 14 resistance R 14, its first end is connected with the base stage of the first triode QN1, the second end ground connection;
The 15 resistance R 15, its first end is connected with the base stage of the first triode QN1, the second end ground connection.
Further, the amplitude of the operation information signal obtaining through demodulation is very little, second singlechip None-identified, thus also need to arrange level shifting circuit, to play amplification.More particularly, the amplitude of the operation information signal that demodulation obtains is hundreds of mV, and the signal amplitude that second singlechip can recognize is 3.3V.Level shifting circuit plays the level signal output that the operation information signal of hundreds of mV is converted to 3.3V, so that second singlechip identification.
Described level shifting circuit, has input I6, and input I6 receiving described operation information signal, and output O5, and output O5 level signal output that described operation information signal is converted to.Described second singlechip receives described level signal by its input I6, and by its output O5, exports after described level signal is converted into corresponding operation information.
The circuit structure diagram of level shifting circuit as shown in Figure 9.Described level shifting circuit comprises:
The second operational amplifier QA2, there is earth terminal, power end, Enable Pin, first input end, the second input and output, its Enable Pin is connected with power end, first input end ground connection, the second input is connected with the input I6 of described level shifting circuit by the 12 capacitor C 12, and output is connected with the output O5 of described level shifting circuit by the 18 resistance;
The 13 capacitor C 13, its first end ground connection, the second end is connected with the second input of described the second operational amplifier QA2;
The 14 capacitor C 14, its first end ground connection, the second end is connected with the output O5 of described level shifting circuit.
Its principle is that the voltage ratio by operational amplifier QA2 acts on, by operation information signal is compared with low level, two inputs are distinguished input operation information signal and ground connection (being low level 0), the level signal that the operation information signal that by amplitude is hundreds of mV is 3.3V through output amplitude after comparing with zero level, identifies for second singlechip.
Second singlechip, has input, and input receives described operation information signal; And output, and the operation information that output is converted to described operation information signal is exported;
Video processing unit, has the described operation information of reception to transfer the input of OSD menu.
The device of transferring the OSD menu in video camera of utility model the utility model embodiment, neither need additionally to lay cable, need to not transfer at video camera end the operation of menu yet, only need to carry out button operation at local monitor end, and in the vision signal of the coaxial cable transmission that is added to after the operation information of button is processed, at video camera end process demodulator circuit, after the processing of second singlechip, reach video processing unit to transfer OSD menu, do not affect again the transmission of sdi signal simultaneously, realize single coaxial cable transmission video signal and transfer OSD menu, simplify project installation.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of the utility model protection.
Claims (8)
1. transfer a device for the OSD menu in video camera, comprise by the interconnected video camera end of coaxial cable and local monitor end, it is characterized in that, comprising:
Be located at local monitor end the corresponding OSD menu being electrically connected to successively button, the first single-chip microcomputer, modulation circuit, decay buffer circuit and be located at the filtering buffer circuit, Shape correction circuit, demodulator circuit, level shifting circuit, second singlechip and the video processing unit that are electrically connected to successively of video camera end;
Wherein,
The first single-chip microcomputer, has input, and described input receives the operation information of described button; And output, and the operation information signal that described output is converted to described operation information is exported;
Modulation circuit, has first signal input, and described first signal input receives described operation information signal; Secondary signal input, and the input of described secondary signal input reception carrier signal; And output, and described output is modulated to by described operation information signal the amplitude-modulated signal output that described carrier signal generates;
Decay buffer circuit, have input, and described input receives described amplitude-modulated signal; And output, and described output exports the amplitude-modulated signal after decay isolation described coaxial cable to, to generate the first superposed signal with described vision signal stack, reaches the demodulation that video camera end carries out described operation information;
Filtering buffer circuit, has input, and described input receives first superposed signal producing at local monitor end of described coaxial cable transmission; And output, and described output is by the second superposed signal output generating after the first superposed signal isolation;
Shape correction circuit, has input, and described input makes described the second superposed signal input; And output, and described output is by the 3rd superposed signal output generating after described the second superposed signal shaping;
Demodulator circuit, has input, and described input makes described the 3rd superposed signal input; And output, and the described operation information signal that described output obtains described the 3rd superposed signal demodulation is exported;
Level shifting circuit, has input, and described input receives described operation information signal; And output, and the level signal that described output is converted to described operation information signal is exported;
Second singlechip, has input, and described input receives described level signal; And output, and the operation information that described output is converted to described level signal is exported;
Video processing unit, has input, and described input receives described operation information to transfer OSD menu.
2. the device of transferring the OSD menu in video camera according to claim 1, is characterized in that, described modulation circuit comprises:
Active crystal oscillator, has input, and described input is connected with the secondary signal input of described modulation circuit; And output, and described output is connected with the second input of the second NAND gate by the second resistance;
The first NAND gate, has first input end and the second input, and described first input end is all connected by the first resistance with described first signal input with described the second input; And output, and described output is connected with the first input end of the second NAND gate;
The second NAND gate, has first input end, the second input; And output, described output with or the second input of door be connected and described output is connected by the 4th resistance with signal output part;
Or door, there is the second input, and described the second input is connected with the output of the second NAND gate; And first input end, and described first input end is connected by the first resistance with described first signal input; Output, and described output is connected with signal output part by the 3rd resistance.
3. the device of transferring the OSD menu in video camera according to claim 2, is characterized in that, also comprises:
The power end of described the first NAND gate is by the first capacity earth;
The power end of described the second NAND gate is by the second capacity earth;
The power end of described active crystal oscillator is by the 3rd capacity earth;
Power end described or door passes through the 4th capacity earth.
4. the device of transferring the OSD menu in video camera according to claim 1, is characterized in that, described decay buffer circuit comprises:
The 4th resistance, one end connects the input of described decay buffer circuit, other end ground connection;
The 5th electric capacity, one end connects the input of described decay buffer circuit, other end ground connection;
The 6th electric capacity, the 5th resistance and the first magnetic bead, be connected in series between the input and output of described decay buffer circuit.
5. the device of transferring the OSD menu in video camera according to claim 1, is characterized in that, described filtering buffer circuit comprises:
The second magnetic bead, its first end is connected with the input of described filtering buffer circuit, and the second end is connected with RL module;
RL module, comprises the first inductance and the 6th resistance that are connected in parallel, and its first end is connected with the second end of described the second magnetic bead, and the second end is connected with the output of described filtering buffer circuit;
The 7th electric capacity and the 8th electric capacity, be connected in series between the second end of described RL module and the output of described filtering buffer circuit.
6. the device of transferring the OSD menu in video camera according to claim 1, is characterized in that, described Shape correction circuit comprises:
The first operational amplifier, there is earth terminal, power end, Enable Pin, first input end, the second input and output, its first input end is connected with the power end of described Shape correction circuit with the tenth resistance by the 7th resistance, Enable Pin is connected with power end, and the second input is connected with the input of described Shape correction circuit; Output is connected with the output of described Shape correction circuit by the tenth electric capacity;
The 8th resistance, its first end is connected with the second input of described the first operational amplifier, and the second end is connected with the 7th resistance;
The 11 resistance, is connected between the output and first input end of described the first operational amplifier;
The 9th resistance, its first end ground connection, the second end is connected with the second end of the 8th resistance;
The 9th electric capacity, its first end ground connection, the second end is connected with the second end of the 8th resistance;
The 12 resistance, its first end ground connection, the second end is connected with the output of described the first operational amplifier.
7. the device of transferring the OSD menu in video camera according to claim 1, is characterized in that, described demodulator circuit comprises:
The first triode, its base stage is connected with the power end of described demodulator circuit by the 13 resistance, and collector electrode is connected with the power end of described demodulator circuit, and the radiation utmost point is connected with the input of described demodulator circuit;
The second triode, its base stage is connected with the radiation utmost point of the first triode, and collector electrode is connected with the power end of described demodulator circuit, and the radiation utmost point is connected with the output of described demodulator circuit;
The 16 resistance, its first end is connected with the radiation utmost point of described the first triode, the second end ground connection;
The 11 electric capacity, its first end is connected with the radiation utmost point of described the second triode, the second end ground connection;
The 17 resistance, its first end is connected with the radiation utmost point of described the second triode, the second end ground connection;
The 13 resistance, its first end is connected with the power end of described demodulator circuit, and the second end is connected with the base stage of the first triode;
The 14 resistance, its first end is connected with the base stage of the first triode, the second end ground connection;
The 15 resistance, its first end is connected with the base stage of the first triode, the second end ground connection.
8. the device of transferring the OSD menu in video camera according to claim 1, is characterized in that, described level shifting circuit comprises:
The second operational amplifier, there is earth terminal, power end, Enable Pin, first input end, the second input and output, its Enable Pin is connected with power end, first input end ground connection, the second input is connected with the input of described level shifting circuit by the 12 electric capacity, and output is connected with the output of described level shifting circuit by the 18 resistance;
The 13 electric capacity, its first end ground connection, the second end is connected with the second input of described the second operational amplifier;
The 14 electric capacity, its first end ground connection, the second end is connected with the output of described level shifting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420019575.3U CN203722741U (en) | 2014-01-13 | 2014-01-13 | Apparatus of taking OSD menu in camera |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420019575.3U CN203722741U (en) | 2014-01-13 | 2014-01-13 | Apparatus of taking OSD menu in camera |
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| CN203722741U true CN203722741U (en) | 2014-07-16 |
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| CN201420019575.3U Expired - Fee Related CN203722741U (en) | 2014-01-13 | 2014-01-13 | Apparatus of taking OSD menu in camera |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104702823A (en) * | 2014-01-13 | 2015-06-10 | 杭州海康威视数字技术股份有限公司 | Device and method for accessing OSD (on-screen display) menu in camera |
-
2014
- 2014-01-13 CN CN201420019575.3U patent/CN203722741U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104702823A (en) * | 2014-01-13 | 2015-06-10 | 杭州海康威视数字技术股份有限公司 | Device and method for accessing OSD (on-screen display) menu in camera |
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