CN208638437U - A kind of image capture device, rear end control equipment and a kind of monitored video camera system - Google Patents

Abstract

The utility model embodiment provides a kind of image capture device, rear end control equipment and a kind of monitored video camera system, wherein the image capture device, comprising: microphone circuit, audio signal conversion circuit, figure are dedicated and turn serial core piece and imaging sensor；Microphone circuit is used to acquire the analog audio signal of monitoring site；Audio signal conversion circuit is electrically connected with microphone circuit, for analog audio signal to be converted to pulse width modulation (PWM) signal；Figure is dedicated and turns serial core piece and is electrically connected respectively with audio signal conversion circuit and imaging sensor, for pwm signal to be converted to digital audio and video signals, the data image signal that digital audio and video signals and imaging sensor are sent is converted into serial data jointly, and serial data is sent to rear end control equipment.So as to realize while acquiring picture signal, the audio signal of monitoring site is acquired, and the audio signal of acquisition and picture signal are sent to rear end control equipment jointly.

Description

A kind of image capture device, rear end control equipment and a kind of monitored video camera system

Technical field

The utility model relates to monitoring technology field, more particularly to a kind of image capture device, rear end control equipment and A kind of monitored video camera system.

Background technique

With the promotion of people's awareness of safety, monitored video camera system has also obtained extensive reference, and monitored video camera system can be with It is arranged in various occasions, to acquire the video pictures of monitoring site.

In some occasions, in order to enable monitored video camera system has hiding ability well, and there is good video to draw Face acquisition capacity, it will usually use monitored video camera system as shown in Figure 1, which specifically includes that Image Acquisition Equipment 100, rear end control equipment 110 and signal transmission line 120, the signal transmission line 120 can be coaxial line or Twisted pair.After imaging sensor 101 in image capture device 100 collects vision signal, by and turn serial core piece 102, will Parallel video signal is converted to serial video signal, is then transferred to rear end by signal transmission line 120 and controls equipment 110. Rear end control equipment 110 after receiving the serial video signal, by string turn and chip 111 by the serial video signal again Parallel video signal is converted to, then is handled by processor 112.

Vision signal in other occasion, in addition to using monitored video camera system acquisition monitoring site, it is also necessary to prison The audio signal at control scene is acquired, however, above-mentioned monitored video camera system can not acquire the audio signal of monitoring site.

Utility model content

The utility model embodiment is designed to provide a kind of image capture device, rear end control equipment and a kind of monitoring Camera system acquires the audio signal of monitoring site to realize while acquiring picture signal, and by the audio signal of acquisition It is sent to rear end control equipment jointly with picture signal.Specific technical solution is as follows:

In the one aspect of the utility model embodiment, the utility model embodiment provides a kind of image capture device, The image capture device includes: microphone circuit, audio signal conversion circuit, figure is dedicated and turns serial core piece and image sensing Device；

Microphone circuit is used to acquire the analog audio signal of monitoring site；

Audio signal conversion circuit is electrically connected with microphone circuit, for analog audio signal to be converted to pulse width tune Pwm signal processed；

Figure is dedicated and turns serial core piece and is electrically connected respectively with audio signal conversion circuit and imaging sensor, for by PWM Signal is converted to digital audio and video signals, and the data image signal that digital audio and video signals are sent with imaging sensor is converted to jointly Serial data, and serial data is sent to rear end control equipment.

Optionally, microphone circuit includes microphone circuit and/or external microphone wind-powered electricity generation road on plate.

Optionally, audio signal conversion circuit includes: D class amplification circuit；

D class amplification circuit, it is dedicated with microphone circuit and figure respectively and turn serial core piece and be electrically connected, for by analogue audio frequency Signal is converted to pwm signal, and to be sent to figure dedicated and turn serial core piece.

Optionally, a kind of image capture device of the utility model embodiment, further includes: the first operational amplification circuit；

First operational amplification circuit is electrically connected with microphone circuit and D class amplification circuit respectively, for microphone circuit The audio signal of acquisition carries out gain, and the audio signal after gain is sent to D class amplification circuit.

Optionally, image capture device further include: level shifting circuit；

Level shifting circuit is dedicated with D class amplification circuit and figure respectively and turns serial core piece and is electrically connected, for believing PWM Number level conversion be predetermined level, and the pwm signal for being converted into predetermined level exports dedicated to figure and turns serial core piece.

Optionally, imaging sensor is dedicated with figure and turns the image input pin of serial core piece and is electrically connected；Audio signal turns It is dedicated with figure and turn the universal input output pin of serial core piece and be electrically connected to change circuit.

In the other side of the utility model embodiment, the utility model embodiment additionally provides a kind of control of rear end and sets Standby, rear end control equipment includes: that the dedicated string of figure turns simultaneously chip, audio signal restoring circuit and processor；

The dedicated string of figure turns and chip is electrically connected with processor and audio signal restoring circuit respectively, for receiving string After row data, serial data is separated, obtains picture signal and pwm signal, and picture signal is sent to processor, it will Pwm signal is sent to audio signal restoring circuit；

Audio signal restoring circuit turns respectively with the dedicated string of figure and chip and processor are electrically connected；For by pwm signal Analog audio signal is reverted to, and analog audio signal is sent to processor；

Processor is used to carry out fusion treatment to the analog audio signal and picture signal received, and obtaining fusion has audio The image data of data.

Optionally, audio signal restoring circuit includes: low-pass filter circuit；

Low-pass filter circuit turns respectively with the dedicated string of figure and chip and processor are electrically connected, for turning the dedicated string of figure And the pwm signal of chip output reverts to analog audio signal.

Optionally, a kind of rear end of the utility model embodiment controls equipment, further includes: the second operational amplification circuit；

Second operational amplification circuit is electrically connected with low-pass filter circuit and processor respectively, for defeated to low-pass filter circuit Analog audio signal out carries out gain, and the analog audio signal after gain is sent to processor.

Optionally, audio signal restoring circuit turns with the dedicated string of figure and the universal input output pin of chip is electrically connected； Processor turns with the dedicated string of figure and the image output pin of chip is electrically connected.

In the other side of the utility model embodiment, the utility model embodiment additionally provides a kind of monitoring camera system System, the monitored video camera system include: image capture device, rear end control equipment and signal transmission line；Image capture device is logical Signal transmission line is crossed to be electrically connected with rear end control equipment.

The image capture device is any of the above-described image capture device, and it is any of the above-described institute which, which controls equipment, The rear end control equipment stated.

A kind of image capture device, rear end control equipment and a kind of monitoring camera system provided by the embodiment of the utility model System can be in the analogue audio frequency letter for collecting monitoring site by the way that audio signal conversion circuit to be electrically connected with microphone circuit Number, which is converted into pwm signal, it is image is dedicated and turn serial core piece and audio conversion circuit and image sensing The pwm signal can be converted to digital audio and video signals, then the digital audio and video signals and imaging sensor are sent by device electrical connection Picture signal be converted to serial data jointly, and serial data is sent to rear end control equipment.It is being adopted so as to realize While collecting picture signal, the audio signal of monitoring site is acquired, and the audio signal of acquisition and picture signal are sent jointly Equipment is controlled to rear end.Certainly, implement the utility model any product or method it is not absolutely required to and meanwhile reach the above institute All advantages stated.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the structural schematic diagram of image capturing system in the prior art；

Fig. 2 is a kind of structural schematic diagram of the first embodiment of image capture device of the utility model embodiment；

Fig. 3 is the structural schematic diagram of microphone circuit on a kind of plate of image capture device of the utility model embodiment；

Fig. 4 is the structural schematic diagram of microphone circuit on a kind of plate of image capture device of the utility model embodiment；

Fig. 5 is principle of signal conversion schematic diagram in a kind of image capture device of the utility model embodiment；

Fig. 6 is a kind of structural schematic diagram of second of embodiment of image capture device of the utility model embodiment；

Fig. 7 is the structural schematic diagram of D class amplification circuit in a kind of image capture device of the utility model embodiment；

Fig. 8 is a kind of structural schematic diagram of the third embodiment of image capture device of the utility model embodiment；

Fig. 9 is the structural representation of the first operational amplification circuit in a kind of image capture device of the utility model embodiment Figure；

Figure 10 is a kind of structural schematic diagram of the 4th kind of embodiment of image capture device of the utility model embodiment；

Figure 11 is that a kind of rear end of the utility model embodiment controls the structural schematic diagram of the first embodiment of equipment；

Figure 12 is that a kind of rear end of the utility model embodiment controls signal recovery schematic illustration in equipment；

Figure 13 is a kind of structural schematic diagram of second of embodiment of image capture device of the utility model embodiment；

Figure 14 is the structural schematic diagram that a kind of rear end of the utility model embodiment controls the third embodiment of equipment；

Figure 15 is a kind of structural schematic diagram of monitored video camera system of the utility model embodiment.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

In order to solve the problems in the existing technology, the utility model embodiment provide a kind of image capture device, Rear end controls equipment and a kind of monitored video camera system, to realize while acquiring picture signal, acquires the audio of monitoring site Signal, and the audio signal of acquisition and picture signal are sent to rear end control equipment jointly.

In the following, a kind of image capture device of the utility model embodiment is introduced first, as shown in Fig. 2, for this A kind of structural schematic diagram of the first embodiment of image capture device of utility model embodiment, in Fig. 2, the Image Acquisition Equipment may include: microphone circuit 210, audio signal conversion circuit 220, figure is dedicated and turns serial core piece 230 and image Sensor 240；

Wherein, microphone circuit 210 is used to acquire the analog audio signal of monitoring site；

Audio signal conversion circuit 220 is electrically connected with microphone circuit 210, for analog audio signal to be converted to pulse Width modulated pwm signal.

Figure is dedicated and turns serial core piece 230 and is electrically connected respectively with audio signal conversion circuit 220 and imaging sensor 240, For pwm signal to be converted to digital audio and video signals, by the data image signal of digital audio and video signals and imaging sensor transmission Serial data is converted to jointly, and serial data is sent to rear end control equipment.

In some instances, the figure is dedicated and turns serial core piece and can be based on GMSL (Gigabit multimedia Serial link, gigabit multimedia serial link), FPD-Link III (Flat Panel Display Link III, the third generation Video serial mechanics of communication) or FPD-Link II (Flat Panel Display Link II, the communication of second generation video serial Technology) and turn serial core piece.

In some instances, above-mentioned image capture device can use more when acquiring the audio signal of monitoring site Kind mode is acquired, and it is, for example, possible to use the acquisitions of built-in microphone, and external microphone acquisition also can be used, therefore, Above-mentioned microphone circuit 210 can wrap microphone circuit and/or external microphone wind-powered electricity generation road on rubbing board.

In some instances, as shown in figure 3, for Mike on a kind of plate of image capture device of the utility model embodiment The structural schematic diagram on wind-powered electricity generation road, in Fig. 3, microphone circuit may include: microphone chip, first resistor and on the plate One capacitor；Wherein, the first grounding pin of microphone chip and the electrical connection of the second grounding pin, and be grounded, microphone chip It is electrically connected between power pins and the first grounding pin and the second grounding pin by first capacitor；The output of microphone chip is drawn Foot is connected with first resistor, for the audio of acquisition to be converted to analog audio signal, and analog audio signal is passed through first Resistance output.

In some instances, above-mentioned microphone chip can be microphone chip in the prior art, such as can be DMK-7324 microphone chip.

In some instances, as shown in figure 4, for Mike on a kind of plate of image capture device of the utility model embodiment The structural schematic diagram on wind-powered electricity generation road, in Fig. 4, the external microphone wind-powered electricity generation road may include: external microphone wind interface, the second capacitor with And second resistance, wherein external microphone wind interface is for connecting external microphone wind；The second pin of external microphone wind interface, Three pins and the electrical connection of the 4th pin, and be grounded；First pin of external microphone wind interface is electrically connected with second resistance；It is external First pin of microphone interface also with second pin, third pin and the 4th pin, is electrically connected by the second capacitor.

In some instances, in order to enable figure it is dedicated and turn serial core piece can transmit image capture device acquisition audio Signal, the figure is dedicated and turns serial core piece after receiving pwm signal, can convert to the signal, specifically, such as Fig. 5 It is shown, it is principle of signal conversion schematic diagram in a kind of image capture device of the utility model embodiment, in Fig. 5, the figure It is dedicated and turn serial core piece and can realize and PWM audio signal is converted into number by the way that sampling clock and the pwm signal to be combined Word signal.

Specifically, to be input to figure dedicated and after turning serial core piece for above-mentioned pwm signal, figure it is dedicated and turn serial core piece with than Higher sample frequency samples the pwm signal, and the number so as to which the pwm signal is converted to higher resolution is believed Number, in some instances, which can be 100MHz, that is, the waveform in each period can be converted into 200 numbers Word signal.It is converted into the PWM signal of digital signal, it can be dedicated by figure and turn serial core piece with the data of image section together Coded transmission control equipment to rear end.

A kind of image capture device of the utility model embodiment, by by audio signal conversion circuit and microphone circuit Electrical connection, can be converted to pwm signal for the analog audio signal, will scheme in the analog audio signal for collecting monitoring site As dedicated and turn serial core piece and be electrically connected with audio conversion circuit and imaging sensor, which can be converted to digital sound Frequency signal, then the picture signal that the digital audio and video signals and imaging sensor are sent is converted into serial data jointly, and will string Row data are sent to rear end control equipment.So as to realize while acquiring picture signal, the audio of monitoring site is acquired Signal, and the audio signal of acquisition and picture signal are sent to rear end control equipment jointly.

On the basis of a kind of image capture device shown in Fig. 2, the utility model embodiment additionally provides a kind of possibility Implementation, as shown in fig. 6, for the utility model embodiment a kind of image capture device second of embodiment knot Structure schematic diagram, in Fig. 6, which may include: D class amplification circuit 221；

D class amplification circuit 221, it is dedicated with microphone circuit 210 and figure respectively and turn serial core piece 230 and be electrically connected, it is used for Analog audio signal is converted to pwm signal, and to be sent to figure dedicated and turn serial core piece.

In some instances, above-mentioned D class amplification circuit 221 can use the triangular-wave generator of 500KHz, so as to So that the frequency of the pwm signal of D class amplification circuit output is also 500KHz.

In some instances, as shown in fig. 7, for D class amplification in a kind of image capture device of the utility model embodiment The structural schematic diagram of circuit, in Fig. 7, which may include: class-D amplifier, the tenth resistance, the 11st electricity Resistance, twelfth resistor, thirteenth resistor, the 14th resistance and the 15th resistance；

The reversed input pin of class-D amplifier is electrically connected by the tenth resistance and eleventh resistor with operational amplification circuit；D The positive input pin of class A amplifier A is grounded by twelfth resistor and thirteenth resistor；The positive output of class-D amplifier is drawn Foot by the 14th resistance with and turn universal input/output pin of serial core piece and be electrically connected；The anti-phase output pin of class-D amplifier Pass through the 15th resistance eutral grounding.

In a kind of possible scene, the signal amplitude of the analog audio signal of microphone circuit acquisition may be suitble to audio Signal conversion circuit is converted, it is also possible to there are signal amplitude is too low or Tai Gao and be not suitable for audio signal conversion circuit into Row conversion.

In this regard, the utility model embodiment additionally provides one kind on the basis of a kind of image capture device shown in Fig. 6 Possible implementation, as shown in figure 8, a kind of the third embodiment of image capture device for the utility model embodiment Structural schematic diagram, in fig. 8, above-mentioned image capture device can also include: the first operational amplification circuit 250；

First operational amplification circuit 250 is electrically connected with microphone circuit 210 and D class amplification circuit 221 respectively, for wheat The audio signal of gram wind-powered electricity generation road acquisition carries out gain, and the audio signal after gain is sent to D class amplification circuit 221.

For example, it is assumed that the signal amplitude for the analog audio signal that microphone circuit 210 acquires is 60mV, well below D class Signal amplitude when amplifying circuit is converted, then the first above-mentioned operational amplification circuit 250 can be provided to the analog audio signal The gain of one 10dB, the signal amplitude of the audio signal after gain are 600mV, the signal amplitude be suitble to D class amplification circuit into Row conversion.

It should be understood that the amplitude of the gain is in the utility model embodiment and failed call, it can be according to practical feelings Gain range is increased or is reduced by condition.

In some instances, as shown in figure 9, for the first operation in a kind of image capture device of the utility model embodiment The structural schematic diagram of amplifying circuit, in Fig. 9, which may include: operational amplifier, third electricity Resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance and the 9th resistance；Wherein, operational amplifier Inverting input terminal is electrically connected by 3rd resistor with microphone circuit；

3rd resistor is also electrically connected with the 4th resistance and the 5th resistance；The normal phase input end of operational amplifier passes through the 6th electricity Resistance, is electrically connected, the 7th resistance eutral grounding with the 7th resistance and the 8th resistance；8th resistance also with the power pins of operational amplifier Electrical connection；The inverting input terminal of operational amplifier also passes through the 9th resistance and is electrically connected with the output end of operational amplifier.

In a kind of possible scene, the level of the pwm signal of D class amplification circuit output may be dedicated with figure and turns string Chip matching, it is also possible to it is dedicated with figure and turn serial core piece mismatch.

When the level of the pwm signal of D class amplification circuit output is dedicated with figure and turns serial core piece mismatches, in Fig. 8 institute On the basis of a kind of image capture device shown, the utility model embodiment additionally provides a kind of possible implementation, such as schemes Shown in 10, it is a kind of structural schematic diagram of the 4th kind of embodiment of image capture device of the utility model embodiment, is scheming In 10, above-mentioned image capture device can also include: level shifting circuit 260；

Level shifting circuit 260 is dedicated with D class amplification circuit and figure respectively and turns serial core piece and is electrically connected, for by PWM The level conversion of signal is predetermined level, and the pwm signal for being converted into predetermined level exports dedicated to figure and turns serial core piece.

In some instances, imaging sensor 240 is dedicated with figure and turns the image input pin of serial core piece 230 and is electrically connected It connects；Audio signal conversion circuit 220 is dedicated with figure and turns the universal input output pin of serial core piece 230 and is electrically connected.

By increasing electrical level transferring chip, the level and figure for the pwm signal that D class amplification circuit can be made to export are dedicated And turns serial core piece and match.

For example, it is assumed that class-D amplifier output is the pwm signal of 3.3V, and figure is dedicated and turns the level of serial core piece and is 1.8V, the two obviously mismatch, then can be believed the PWM that the pwm signal of 3.3V is transformed to 1.8V by electrical level transferring chip Number, conversion front and back, only signal amplitude changes, and pulsewidth of pwm signal etc. remains unchanged.

Corresponding to above-mentioned image capture device, the utility model embodiment additionally provides a kind of rear end control equipment, with The picture signal and audio signal for allowing to transmit image capture device are handled, practical new for this as shown in Figure 11 A kind of structural schematic diagram of rear end control the first embodiment of equipment of type embodiment, in Figure 11, which controls equipment It may include: that the dedicated string of figure turns simultaneously chip 1110, audio signal restoring circuit 1120 and processor 1130；

The dedicated string of figure turns and chip 1110 is electrically connected with processor 1130 and audio signal restoring circuit 1120 respectively, uses In after receiving serial data, serial data is separated, obtains picture signal and PWM signal, and picture signal is sent out It send to processor 1130, pwm signal is sent to and states audio signal restoring circuit 1120；

Audio signal restoring circuit 1120 turns respectively with the dedicated string of figure and chip 1110 and processor 1130 are electrically connected；With In pwm signal is reverted to analog audio signal, and analog audio signal is sent to processor 1130；

Processor 1130 is used to carry out fusion treatment to the analog audio signal and picture signal received, and obtaining fusion has The image data of audio data.

In some instances, the dedicated string of the figure turns and chip can be based on GMSL (Gigabit multimedia Serial link, gigabit multimedia serial link), FPD-Link III (Flat Panel Display Link III, the third generation Video serial mechanics of communication) or FPD-Link II (Flat Panel Display Link II, the communication of second generation video serial Technology) string turn and chip.

In some instances, rear end control equipment is after the serial data for receiving image capture device transmission, in order to make User is obtained when obtaining video by rear end control equipment viewing monitoring image, can hear audio-frequency information simultaneously, rear end control is set It is standby the serial data to be separated.

Specifically, above-mentioned figure it is dedicated string turn and chip can to image capture device transmit serial data first into Row decoding, then separates decoded serial data, in separation, serial data can be reverted to parallel data.

After being separated to serial data, in order to enable processor 1130 can identify the audio signal after the separation, The dedicated string of above-mentioned figure turns and chip, the conversion regime opposite with signal conversion regime shown in fig. 5 can be used, to this point Audio signal from after carries out sampling recovery processing, as shown in figure 12, sets for a kind of rear end control of the utility model embodiment Standby middle signal restores schematic illustration, and in Figure 12, digital signal obtained after separation, can by being combined with sampling clock PWM signal is converted digital signals into realize.

In some instances, turned by the dedicated string of figure and chip 1110 restore obtained pwm signal can not direct quilt Processor 1130 identifies that therefore, which can further restore by audio signal restoring circuit 1120, and obtaining can be with The analog audio signal identified by processor 1130.

In some instances, the audio signal restoring circuit 1120 can turn with the dedicated string of figure and chip 1110 it is logical It is electrically connected with input and output pin；Processor 1130 can turn with the dedicated string of figure and the image output pin of chip 1110 is electrically connected It connects.

It in some instances, can be using in the prior art when being synthesized to analog audio signal and picture signal Synthetic technology synthesized, which is not described herein again.

A kind of rear end provided by the embodiment of the utility model controls equipment, by by the dedicated string of figure turn and chip respectively with Processor is connected with audio signal restoring circuit, can be separated after receiving serial data to serial data, be obtained figure As signal and pwm signal, and picture signal is sent to processor, PWM signal is sent to audio signal restoring circuit, led to It crosses and audio signal restoring circuit is turned into simultaneously chip and processor 1130 with the dedicated string of figure respectively, pwm signal can be reverted to Analog audio signal, and analog audio signal is sent to processor；By processor 1130 to the analog audio signal received Fusion treatment is carried out with picture signal, obtains the image data that fusion has audio data.Image is being received so as to realize After acquiring the serial data that equipment is sent, which is handled, the picture number that can synthesize audio signal is obtained According to and then other equipment can to get synthesis from rear end control equipment have the image data of audio signal, and can be with It directly plays out, does not need to carry out synthesis processing again.

On the basis of a kind of rear end control equipment shown in Figure 11, the utility model embodiment additionally provides a kind of possibility Implementation be as shown in figure 13 that a kind of rear end of the utility model embodiment controls second embodiment of equipment Structural schematic diagram, in Figure 13, audio signal restoring circuit 1120 may include: low-pass filter circuit 1121；Wherein, low pass Filter circuit 1121 turns respectively with the dedicated string of figure and chip 1110 and processor 1130 are electrically connected, and is used for the dedicated string of figure Turn and the pwm signal of the output of chip 1110 reverts to analog audio signal.

In some instances, which may include: inductance and capacitor；The input terminal and string of inductance turn And the universal input of chip/output pin electrical connection；The output end of inductance is electrically connected with operational amplification circuit and capacitor respectively；Electricity Hold ground connection.

In some instances, the filter cutoff frequency of the low-pass filter circuit 1121 can be set to 20KHz.

On the basis of a kind of rear end control equipment shown in Figure 13, the utility model embodiment additionally provides a kind of possibility Implementation be as shown in figure 14 that a kind of rear end of the utility model embodiment controls the third embodiment of equipment Structural schematic diagram, the rear end control equipment stated in fig. 14, upper, can also include: the second operational amplification circuit 1140；

Second operational amplification circuit 1140 is electrically connected with low-pass filter circuit 1121 and processor 1130 respectively, for low The analog audio signal that bandpass filter circuit 1121 exports carries out gain, and the analog audio signal after gain is sent to processor 1130。

In some instances, which can be using the same or similar with the first operational amplification circuit Amplifying circuit carries out gain process to the analog audio signal that low-pass filter circuit exports to realize.For example, can be to low pass filtered The gain of the analog audio signal progress -3dB of wave circuit output.

In some instances, which can be increase, is also possible to reduce, be not required here, can basis Practical application is configured.

In some instances, the dedicated string of figure turns and chip can pass through MIPI (Mobile Industry Processor Interface, mobile industry processor interface) interface, LVDS (Low Voltage Differential Signaling, it is low Press difference signal technique) interface, BT1120 interface etc. is electrically connected with processor.

Equipment is controlled corresponding to above-mentioned image capture device and rear end, the utility model embodiment additionally provides a kind of prison Camera system is controlled, is a kind of structural schematic diagram of monitored video camera system of the utility model embodiment, in Figure 15 as shown in figure 15 In, it may include image capture device 1510, rear end control equipment 1520 and signal transmission line 1530；

Wherein, image capture device 1510 controls equipment 1520 with rear end by signal transmission line 1530 and is electrically connected.

In some instances, which can be coaxial line or twisted pair.

In some instances, which can be any of the above-described image capture device, after this End control equipment can be any of the above-described rear end control equipment.

By a kind of monitored video camera system provided by the embodiment of the utility model, image capture device can collected After the analog audio signal of monitoring site, which is converted into digital audio and video signals, then by the digital audio and video signals and scheme As sensor send picture signal be converted to serial data jointly, finally by serial data be sent to rear end control equipment.From And may be implemented while acquiring picture signal, acquire the audio signal of monitoring site, and by the audio signal and figure of acquisition As signal is sent to rear end control equipment jointly.Rear end control equipment, can after receiving serial data, to serial data into Row separation, is then sent to processor for isolated picture signal, isolated pwm signal is sent to audio signal Pwm signal is reverted to analog audio signal by audio signal restoring circuit, is finally docked by processor 1130 by restoring circuit The analog audio signal and picture signal received carries out fusion treatment, obtains the image data that fusion has audio data.So as to To realize after the serial data for receiving image capture device transmission, which is handled, obtains to synthesize There is the image data of audio signal, and then other equipment can be made to get synthesis from rear end control equipment audio signal Image data, and can directly play out, not need to carry out synthesis processing again.

The above is only the preferred embodiment of the utility model only, is not intended to limit the protection model of the utility model It encloses.Any modification, equivalent substitution, improvement and etc. made within the spirit and principle of the present invention, are all contained in this reality With in novel protection scope.

Claims (11)

1. a kind of image capture device, which is characterized in that described image acquisition equipment includes: microphone circuit, audio signal turn It is dedicated and turn serial core piece and imaging sensor to change circuit, figure；

The microphone circuit is used to acquire the analog audio signal of monitoring site；

The audio signal conversion circuit is electrically connected with microphone circuit, wide for the analog audio signal to be converted to pulse Spend modulation (PWM) signal；

The figure is dedicated and turns serial core piece and is electrically connected respectively with the audio signal conversion circuit and described image sensor, uses In the pwm signal is converted to digital audio and video signals, by the number of the digital audio and video signals and described image sensor transmission Word picture signal is converted to serial data jointly, and the serial data is sent to rear end control equipment.

2. image capture device according to claim 1, which is characterized in that the microphone circuit includes microphone on plate Circuit and/or external microphone wind-powered electricity generation road.

3. image capture device according to claim 1, which is characterized in that the audio signal conversion circuit includes: D class Amplifying circuit；

The D class amplification circuit, it is dedicated with the microphone circuit and the figure respectively and turn serial core piece and be electrically connected, for will The analog audio signal is converted to the pwm signal, and to be sent to the figure dedicated and turn serial core piece.

4. image capture device according to claim 3, which is characterized in that described image acquires equipment further include: first Operational amplification circuit；

First operational amplification circuit is electrically connected with the microphone circuit and the D class amplification circuit respectively, for institute The audio signal for stating microphone circuit acquisition carries out gain, and the audio signal after gain is sent to D class amplification circuit.

5. image capture device according to claim 4, which is characterized in that described image acquires equipment further include: level Conversion circuit；

The level shifting circuit is dedicated with the D class amplification circuit and the figure respectively and turns serial core piece and is electrically connected, and is used for By the level conversion of the pwm signal be predetermined level, and the pwm signal for being converted into predetermined level export it is special to the figure With and turn serial core piece.

6. described in any item image capture devices according to claim 1~5, which is characterized in that described image sensor and institute State figure it is dedicated and turn serial core piece image input pin electrical connection；The audio signal conversion circuit and the figure are dedicated simultaneously Turn the universal input output pin electrical connection of serial core piece.

7. a kind of rear end controls equipment, which is characterized in that the rear end control equipment includes: that the dedicated string of figure turns simultaneously chip, sound Frequency signal recovery circuitry and processor；

The dedicated string of figure turns and chip is electrically connected with the processor and the audio signal restoring circuit respectively, is used for After receiving serial data, the serial data is separated, obtains picture signal and pwm signal, and described image is believed Number it is sent to the processor, the pwm signal is sent to the audio signal restoring circuit；

The audio signal restoring circuit turns respectively with the dedicated string of the figure and chip and the processor are electrically connected；For inciting somebody to action The pwm signal reverts to analog audio signal, and the analog audio signal is sent to processor；

The processor is used to carry out fusion treatment to the analog audio signal and picture signal received, and obtaining fusion has audio The image data of data.

8. rear end according to claim 7 controls equipment, which is characterized in that the audio signal restoring circuit includes: low Bandpass filter circuit；

The low-pass filter circuit turns respectively with the dedicated string of the figure and chip and the processor are electrically connected, and being used for will be described The dedicated string of figure turns and the pwm signal of chip output reverts to analog audio signal.

9. rear end according to claim 8 controls equipment, which is characterized in that the rear end controls equipment further include: second Operational amplification circuit；

Second operational amplification circuit is electrically connected with the low-pass filter circuit and the processor respectively, for described low The analog audio signal of bandpass filter circuit output carries out gain, and the analog audio signal after gain is sent to the processing Device.

10. controlling equipment according to the described in any item rear ends of claim 7~9, which is characterized in that the audio signal restores electricity Road turns with the dedicated string of the figure and the universal input output pin of chip is electrically connected；The processor and the dedicated string of the figure Turn and the image output pin of chip is electrically connected.

11. a kind of monitored video camera system, which is characterized in that the system comprises: the described in any item images of claim 1~6 Acquire the described in any item rear end control equipment of equipment, claim 7~10 and signal transmission line；

Described image acquires equipment and is electrically connected by the signal transmission line with rear end control equipment.