Vehicle-mounted video acquisition system and vehicle equipment

Abstract

The utility model relates to a vehicle-mounted video acquisition system and vehicle equipment, and belongs to the field of electronics and electrics. The vehicle-mounted video acquisition system comprises a camera device, a coaxial cable and a vehicle controller, the camera device is connected to the vehicle controller through the coaxial cable, the camera device comprises an interface circuit, and a first signal end of the interface circuit is connected with a central lead of the coaxial cable; the input end of the voltage converter is connected with the voltage connecting end of the interface circuit; the output end of the serializer is connected with the second signal end of the interface circuit, and the power supply end of the deserializer is connected with the output end of the voltage converter; the power supply end of the image sensor is connected with the output end of the voltage converter, and the video signal output end of the image sensor is connected with the output end of the serializer. The method can help to improve the definition of the video collected by the vehicle-mounted camera equipment.

Description

Technical Field

[0001] The present application relates to the field of electronic and electrical technology, and in particular to a vehicle-mounted video acquisition system and vehicle equipment. Background Art

[0002] With the rapid evolution of automobile intelligent driving assistance systems, there have been many advances in reducing environmental load, improving driving comfort, and realizing automobile safety assisted driving. In recent years, in order to improve the intelligent parking assisted driving and other functions of the IVI (In-Vehicle Infotainment) system, in addition to vehicle-mounted electronic equipment, car navigation systems, and car audio, camera-type devices have continued to increase, and the system's requirements for cameras and their transmission lines have become increasingly higher.

[0003] In current vehicle equipment, various cameras with standard interfaces are generally used. Each camera is connected to the power supply system and the control host, and transmits video data based on the corresponding interface standard or format (such as composite synchronous video broadcast signal CVBS). However, the video transmission that can be achieved by such equipment has gradually failed to meet application requirements in terms of clarity and transmission rate. For example, if the clarity of the reversing video image is too low or the delay is too high, it will easily cause the driver to misjudge the surrounding objects and cause an accident. Summary of the invention

[0004] The present application provides a vehicle-mounted video acquisition system and vehicle equipment, which can help improve the clarity of videos captured by vehicle-mounted camera equipment.

[0005] The present application provides a vehicle-mounted video acquisition system, the vehicle-mounted video acquisition system comprising a camera device, a coaxial cable and a vehicle controller, the camera device being connected to the vehicle controller via the coaxial cable, the camera device comprising:

[0006] An interface circuit, wherein a first signal terminal of the interface circuit is connected to a center conductor of the coaxial cable;

[0007] A voltage converter, wherein an input end of the voltage converter is connected to a voltage connection end of the interface circuit;

[0008] A serializer, wherein an output terminal of the serializer is connected to the second signal terminal of the interface circuit, and a power supply terminal of the serializer is connected to an output terminal of the voltage converter;

[0009] An image sensor, wherein a power supply terminal of the image sensor is connected to an output terminal of the voltage converter, and a video signal output terminal of the image sensor is connected to an output terminal of the serializer.

[0010] In some possible implementations, the interface circuit includes:

[0011] an inductor unit, wherein a first end of the inductor unit is connected to a first signal end of the interface circuit, and a second end of the inductor unit is connected to a voltage connection end of the interface circuit;

[0012] A capacitor unit, wherein a first end of the capacitor unit is connected to a first signal end of the interface circuit, and a second end of the capacitor unit is connected to a second signal end of the interface circuit;

[0013] Wherein, the grounding end of the inductor unit and the grounding end of the capacitor unit are both connected to the peripheral grounding wire of the coaxial cable.

[0014] In some possible implementations, the second signal end of the interface circuit includes a first terminal and a second terminal, the output end of the serializer includes a first output end and a second output end, the capacitor unit includes a first capacitor, a second capacitor, a common mode inductor and a first resistor,

[0015] The first end of the first capacitor is connected to the first output end of the serializer via the first terminal, the second end of the first capacitor is connected to the first signal end via the two ends of the first winding in the common-mode inductor, the first end of the second capacitor is connected to the second output end of the serializer via the second terminal, the second end of the second capacitor is connected to the first end of the first resistor via the two ends of the second winding in the common-mode inductor, and the second end of the first resistor is connected to the ground end of the capacitor unit.

[0016] In some possible implementations, the inductance unit includes a magnetic bead inductor, a broadband high-impedance inductor and a second resistor, the first end of the magnetic bead inductor is respectively connected to the first signal end and one end of the first winding in the common-mode inductor, the second end of the magnetic bead inductor is respectively connected to the first end of the broadband high-impedance inductor and the first end of the second resistor, the second end of the broadband high-impedance inductor and the second end of the second resistor are both connected to the voltage connection end of the interface circuit.

[0017] In some possible implementations, the inductor unit further includes a third capacitor and a fourth capacitor.

[0018] A first end of the third capacitor is connected to the voltage connection end, a second end of the third capacitor is connected to the ground end of the inductor unit, and a capacitance value of the third capacitor is 0.1 microfarad;

[0019] A first end of the fourth capacitor is connected to the voltage connection end, a second end of the fourth capacitor is connected to the ground end of the inductor unit, and a capacitance value of the fourth capacitor matches the ripple frequency of the voltage converter.

[0020] In some possible implementations, the interface circuit further includes a bidirectional transient voltage suppression diode, and two ends of the bidirectional transient voltage suppression diode are respectively connected to the first signal terminal of the interface circuit and the peripheral ground wire of the coaxial cable.

[0021] In some possible implementations, the vehicle controller includes an input interface circuit, a deserializer, a voltage output circuit and a processor, the input interface circuit has the same circuit structure as the interface circuit, the first signal end of the input interface circuit is connected to the center conductor of the coaxial cable, the second signal end of the input interface circuit is connected to the input end of the deserializer, the voltage connection end of the input interface circuit is connected to the output end of the voltage output circuit, the output end of the deserializer is connected to the signal input end of the processor, and the control end of the voltage output circuit is connected to the signal output end of the processor.

[0022] In some possible implementations, the voltage converter is configured to provide corresponding output voltages to at least two output terminals of the output end based on the voltage of the input end, the at least two output terminals include an analog power supply voltage output terminal and a digital power supply voltage output terminal, and the power supply end of the serializer includes a first power supply end connected to the analog power supply voltage output terminal and a second power supply end connected to the digital power supply voltage output terminal.

[0023] In some possible implementations, the ground terminal of the voltage converter, the ground terminal of the serializer, and the ground terminal of the image sensor are all connected to the peripheral ground line of the coaxial cable via the ground terminal of the interface circuit.

[0024] The present application also provides a vehicle device, which includes any one of the above-mentioned vehicle-mounted video acquisition systems.

[0025] In the vehicle-mounted video acquisition system of the present application, a coaxial cable is used to connect the camera device and the vehicle controller. The interface circuit in the camera device transmits the electrical energy in the cable transmission signal to the voltage converter to power other components such as the serializer and the image sensor, and outputs the signal output from the video signal output end of the image sensor to the coaxial cable via the serializer, so as to transmit the signal to the vehicle controller through the cable transmission signal; in this way, a single coaxial cable can carry both power and signal transmission at the same time, and the transmission capacity of the coaxial cable makes high-speed transmission of high-definition video signals possible. Therefore, the present application can help improve the clarity of the video captured by the vehicle-mounted camera equipment, help reduce the number of cables and simplify wiring, help improve the safety performance of vehicle equipment, and help improve the reliability of various intelligent driving systems.

[0026] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0028] Figure 1 It is a structural block diagram of a vehicle-mounted video acquisition system provided in an embodiment of the present application;

[0029] Figure 2 is a circuit structure diagram of an interface circuit of a camera device in a vehicle-mounted video acquisition system provided in an embodiment of the present application;

[0030] Figure 3 It is a structural block diagram of a vehicle device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0032] The terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure, and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with ordinary skills in the field to which the present disclosure belongs. The words "first", "second", "third" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limit, but indicate that there is at least one. Words such as "include" or "include" mean that the elements or objects appearing in front of "include" or "include" include the elements or objects listed after "include" or "include" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] Figure 1 is a structural block diagram of a vehicle-mounted video acquisition system provided in an embodiment of the present application. Figure 1 The vehicle-mounted video acquisition system includes a camera device 10, a coaxial cable CC and a vehicle controller 20, and the camera device 10 is connected to the vehicle controller 20 via the coaxial cable CC.

[0034] See also Figure 1The camera device 10 includes an interface circuit 11, a voltage converter 12, a serializer 13 and an image sensor 14, wherein: a first signal terminal S1 of the interface circuit 11 is connected to a central conductor of a coaxial cable CC, an input terminal of the voltage converter 12 is connected to a voltage connection terminal V1 of the interface circuit 11, an output terminal of the serializer 13 is connected to a second signal terminal S2 of the interface circuit 11, a power terminal of the serializer 13 is connected to an output terminal of the voltage converter 12, a power terminal of the image sensor 14 is connected to an output terminal of the voltage converter 12, and a video signal output terminal of the image sensor 14 is connected to an output terminal of the serializer 13.

[0035] It should be noted that the above-mentioned image sensor refers to the component in the camera device that generates a video signal by sensing external light, the above-mentioned serializer refers to the component that converts the signal at the input end into a serial data signal and outputs it at the output end, the above-mentioned voltage converter refers to the component that provides a voltage output to the output end based on the power supply at the input end, and the above-mentioned interface circuit is a circuit structure for coupling the signal inside the camera device into the coaxial cable and coupling the power on the coaxial cable out to the voltage converter. Figure 1 In the example shown, the video signal output end of the image sensor 14 is connected to the central conductor of the coaxial cable CC via the input end and the output end of the serializer 13 and the second signal end S2 and the first signal end S1 of the interface circuit 11, so that the video signal generated by the image sensor 14 is converted into a serial data signal via the serializer 13 and coupled into the central conductor of the coaxial cable CC via the interface circuit 11, so that the video signal can be transmitted from the camera device 10 to the vehicle controller 20 in a serial communication manner; at the same time, the interface circuit 11 couples the power on the central conductor of the coaxial cable CC to the voltage converter 12, so that the voltage converter 12 provides a power supply voltage for the serializer 13 and the image sensor 14, thereby realizing the internal power supply of the camera device 10.

[0036] It can be seen that the vehicle-mounted video acquisition system of the embodiment of the present application uses a coaxial cable to connect the camera device and the vehicle controller. The interface circuit in the camera device transmits the electrical energy in the cable transmission signal to the voltage converter to power the serializer and other components such as the image sensor, and outputs the signal output by the video signal output end of the image sensor to the coaxial cable via the serializer, so as to transmit the signal to the vehicle controller through the cable transmission signal; in this way, a single coaxial cable can carry power and signal transmission at the same time, and at the same time, the transmission capacity of the coaxial cable makes high-speed transmission of high-definition video signals possible. Therefore, the embodiment of the present application can help improve the clarity of the video captured by the vehicle-mounted camera equipment, help reduce the number of cables and simplify wiring, help improve the safety performance of vehicle equipment, and help improve the reliability of various intelligent driving systems.

[0037] In one example, see Figure 2 The vehicle controller 20 includes an input interface circuit 21, a deserializer 22, a voltage output circuit 23 and a processor 24. The first signal terminal S1 of the input interface circuit 21 is connected to the center conductor of the coaxial cable CC, the second signal terminal S2 of the input interface circuit 21 is connected to the input terminal of the deserializer 22, the voltage connection terminal V1 of the input interface circuit 21 is connected to the output terminal of the voltage output circuit 23, the output terminal of the deserializer 22 is connected to the signal input terminal of the processor 24, and the control terminal of the voltage output circuit 23 is connected to the signal output terminal of the processor 24. In one example, the voltage output circuit 23 in the vehicle controller 20 is a DC-DC converter that contains switching elements (such as transistors, relays, etc.) to make the output voltage adjustable. Its processor 24 outputs a switch control signal that switches between a high level and a low level to the control end of the voltage output circuit 23, so that the voltage output circuit 23 can switch between output voltages of different voltage values, thereby adjusting the power transmission method on the center conductor of the coaxial cable CC; in addition, the serial data signal transmitted on the center conductor of the coaxial cable CC is coupled to the input end of the deserializer 22 via the input interface circuit 21, so that the processor 24 can receive the video signal recovered from the serial data signal by the deserializer 22 through the signal input end, thereby realizing the transmission of the video signal from the camera device 10 to the vehicle controller 20.

[0038] In one example, the vehicle controller 20 is a vehicle electronic controller (ECU, Electronic Control Unit), and the processor 24 may be, for example, one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components.

[0039] In one example, not in Figure 1 As shown in the figure, the ground terminal of the voltage converter 12, the ground terminal of the serializer 13 and the ground terminal of the image sensor 14 are all connected to the peripheral ground wire of the coaxial cable CC via the ground terminal of the interface circuit 11, thereby realizing the common ground connection of various parts inside the camera device 10; correspondingly, in the vehicle controller 20, the ground terminal of the deserializer 22, the ground terminal of the voltage output circuit 23 and the ground terminal of the processor 24 are connected to the peripheral ground wire of the coaxial cable CC via the ground terminal of the input interface circuit 21, thereby realizing the overall common ground connection of the vehicle-mounted video acquisition system.

[0040] Figure 2 is a circuit structure diagram of an interface circuit of a camera device in a vehicle-mounted video acquisition system provided by an embodiment of the present application. Figure 2The interface circuit 11 as a whole includes an inductor unit 111 and a capacitor unit 112. The first end of the inductor unit 111 is connected to the first signal terminal S1 of the interface circuit 11, the second end of the inductor unit 111 is connected to the voltage connection terminal V1 of the interface circuit 11, the first end of the capacitor unit 112 is connected to the first signal terminal S1 of the interface circuit 11, and the second end of the capacitor unit 112 is connected to the second signal terminal ( Figure 2 In the example, the second signal end includes the first terminal S21 and the second terminal S22), and in addition, the grounding end of the inductor unit 111 and the grounding end of the capacitor unit 112 are both connected to the peripheral grounding wire of the coaxial cable CC. It should be noted that the above-mentioned inductor unit refers to a circuit structure in which the reactance part of the impedance is inductive reactance, and the above-mentioned capacitor unit refers to a circuit structure in which the reactance part of the impedance is capacitive reactance. It can be seen that since the DC signal can pass through the inductor unit but cannot pass through the capacitor unit, the DC voltage component on the center conductor of the coaxial cable can be coupled into the voltage connection terminal V1 but will not reach the second signal end; and since the AC signal can pass through the capacitor unit but will be greatly hindered by the inductor unit, the AC data signal output by the second signal end can be coupled into the center conductor of the coaxial cable to become its AC component.

[0041] In one example, see Figure 2 The output end of the serializer 13 includes a first output end OU1 and a second output end OUT2, and the capacitor unit 112 includes a first capacitor C1, a second capacitor C2, a common mode inductor CMI and a first resistor R1, wherein: the first end of the first capacitor C1 is connected to the first output end OUT1 of the serializer 13 via the first terminal S21, and the second end of the first capacitor C1 is connected to the first winding ( Figure 2 The two ends of the second capacitor C2 are connected to the first signal terminal S1, the first end of the second capacitor C2 is connected to the second output terminal OUT2 of the serializer 13 via the second terminal S22, and the second end of the second capacitor C2 is connected to the second winding ( Figure 2 Two ends of the winding at the lower middle part of the inductor 111 are connected to the first end of the first resistor R1, and the second end of the first resistor R1 is connected to the ground end of the capacitor unit 112. In this circuit structure, the common mode inductor CMI can cooperate with the inductor in the inductor unit 111 to suppress common mode noise (which may partially come from the switching noise of the voltage converter 12), thereby helping to reduce noise in the signal transmission and processing process.

[0042] In one example, see Figure 2, the inductor unit 111 includes a magnetic bead inductor L1, a broadband high-impedance inductor L2, and a second resistor R2. The first end of the magnetic bead inductor L1 is respectively connected to the first signal terminal S1 and one end of the first winding in the common mode inductor CMI, the second end of the magnetic bead inductor L1 is respectively connected to the first end of the broadband high-impedance inductor L2 and the first end of the second resistor R2, and the second end of the broadband high-impedance inductor L2 and the second end of the second resistor R2 are both connected to the voltage connection terminal V1 of the interface circuit 11. In this circuit structure, the broadband high-impedance inductor L2 refers to an inductor that maintains a large impedance within a wider frequency range, wherein the frequency range can be determined according to the frequency range of the transmission signal, and the impedance size can be selected according to the required degree of noise reduction. In one example, the magnetic bead inductor L1 selects a patch magnetic bead inductor with an impedance of 10μH, and the broadband high-impedance inductor L2 selects an inductor element with an impedance value of 47μH and a frequency range of approximately 4MHz to 1GHz, so that the number of inductors used can be reduced under the same noise reduction effect.

[0043] In one example, see Figure 2 , the inductor unit 111 further includes a third capacitor C3 and a fourth capacitor C4, the first end of the third capacitor C3 is connected to the voltage connection terminal V1, the second end of the third capacitor C3 is connected to the ground terminal of the inductor unit 111, and the capacitance value of the third capacitor C3 is 0.1μF; the first end of the fourth capacitor C4 is connected to the voltage connection terminal V1, the second end of the fourth capacitor C4 is connected to the ground terminal of the inductor unit 111, and the capacitance value of the fourth capacitor matches the ripple frequency of the voltage converter 12 (for example, 10μF is selected). In this way, the third capacitor C3 and the fourth capacitor C4 can cooperate with each other to filter out high-frequency noise in two directions within a wider frequency range (both the high-frequency noise brought by the first signal terminal S1 to the voltage connection terminal V1 and the switching noise brought by the voltage connection terminal V1 to the first signal terminal S1 can be suppressed).

[0044] In one example, see Figure 2 The interface circuit 11 also includes a bidirectional transient voltage suppression diode TVS1, the two ends of which are respectively connected to the first signal terminal S1 of the interface circuit 11 and the peripheral ground wire of the coaxial cable CC, so as to suppress transient voltage and protect other circuit components.

[0045] In addition, in one example, the voltage converter is configured to provide corresponding output voltages to at least two output terminals of the output terminal based on the voltage of the input terminal, wherein the at least two output terminals include an analog power supply voltage output terminal N1 and a digital power supply voltage output terminal N2, and the power supply terminal of the serializer 13 includes a first power supply terminal AVDD connected to the analog power supply voltage output terminal N1 and a second power supply terminal DVDD connected to the digital power supply voltage output terminal N2. Similarly, the voltage converter can also be configured to have more output terminals according to actual applications, so as to provide the required power supply voltages for different circuit components.

[0046] It should be understood that the input interface circuit 21 may have the same circuit structure as the interface circuit 11 and a similar circuit operating principle, which will not be described in detail herein.

[0047] It should be noted that the circuit structures of the various parts of the above vehicle-mounted video acquisition system are merely examples, and the circuit structures of any one or more parts of the vehicle-mounted video acquisition system can be replaced by other circuit structures with the same functions. In addition, the driving circuit can also include other circuit structures not shown according to application requirements, and the embodiments of the present application are not limited to this.

[0048] Figure 3 is a structural block diagram of a vehicle device provided by an embodiment of the present application. Figure 3 The vehicle equipment in the embodiment of the present application includes any of the above-mentioned vehicle-mounted video acquisition systems, which includes a vehicle controller 20 and at least one camera device 10, wherein the vehicle controller 20 includes a processor 24 and a peripheral circuit 25, and each camera device 10 is connected to the processor 24 through a corresponding coaxial cable and a peripheral circuit 25, wherein the peripheral circuit 25 can be, for example, an integrated circuit structure including an input interface circuit 21, a deserializer 22 and a voltage output circuit 23. Figure 3 In addition to the structure shown in , the automobile equipment may, for example, also include one or more of a chassis, a body, and other electrical equipment, and the vehicle controller 20 may, for example, also include other circuit components, which is not limited in the embodiments of the present application.

[0049] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A vehicle-mounted video acquisition system, characterized in that: The vehicle-mounted video acquisition system comprises a camera device, a coaxial cable and a vehicle controller, wherein the camera device is connected to the vehicle controller via the coaxial cable, and the camera device comprises: An interface circuit, wherein a first signal terminal of the interface circuit is connected to a center conductor of the coaxial cable; A voltage converter, wherein an input end of the voltage converter is connected to a voltage connection end of the interface circuit; A serializer, wherein an output terminal of the serializer is connected to the second signal terminal of the interface circuit, and a power supply terminal of the serializer is connected to an output terminal of the voltage converter; An image sensor, wherein a power supply terminal of the image sensor is connected to an output terminal of the voltage converter, and a video signal output terminal of the image sensor is connected to an output terminal of the serializer.

2. The vehicle-mounted video acquisition system according to claim 1, characterized in that: The interface circuit comprises: an inductor unit, wherein a first end of the inductor unit is connected to a first signal end of the interface circuit, and a second end of the inductor unit is connected to a voltage connection end of the interface circuit; A capacitor unit, wherein a first end of the capacitor unit is connected to a first signal end of the interface circuit, and a second end of the capacitor unit is connected to a second signal end of the interface circuit; Wherein, the grounding end of the inductor unit and the grounding end of the capacitor unit are both connected to the peripheral grounding wire of the coaxial cable.

3. The vehicle-mounted video acquisition system according to claim 2, characterized in that: The second signal end of the interface circuit includes a first terminal and a second terminal, the output end of the serializer includes a first output end and a second output end, the capacitor unit includes a first capacitor, a second capacitor, a common mode inductor and a first resistor, The first end of the first capacitor is connected to the first output end of the serializer via the first terminal, the second end of the first capacitor is connected to the first signal end via the two ends of the first winding in the common-mode inductor, the first end of the second capacitor is connected to the second output end of the serializer via the second terminal, the second end of the second capacitor is connected to the first end of the first resistor via the two ends of the second winding in the common-mode inductor, and the second end of the first resistor is connected to the ground end of the capacitor unit.

4. The vehicle-mounted video acquisition system according to claim 3, characterized in that: The inductor unit includes a magnetic bead inductor, a broadband high impedance inductor and a second resistor. The first end of the magnetic bead inductor is respectively connected to the first signal end and one end of the first winding in the common-mode inductor, the second end of the magnetic bead inductor is respectively connected to the first end of the wide-band high-impedance inductor and the first end of the second resistor, and the second end of the wide-band high-impedance inductor and the second end of the second resistor are both connected to the voltage connection end of the interface circuit.

5. The vehicle-mounted video acquisition system according to claim 4, characterized in that: The inductor unit further includes a third capacitor and a fourth capacitor, A first end of the third capacitor is connected to the voltage connection end, a second end of the third capacitor is connected to the ground end of the inductor unit, and a capacitance value of the third capacitor is 0.1 microfarad; A first end of the fourth capacitor is connected to the voltage connection end, a second end of the fourth capacitor is connected to the ground end of the inductor unit, and a capacitance value of the fourth capacitor matches the ripple frequency of the voltage converter.

6. The vehicle-mounted video acquisition system according to claim 5, characterized in that: The interface circuit further includes a bidirectional transient voltage suppression diode, two ends of which are respectively connected to a first signal end of the interface circuit and a peripheral grounding wire of the coaxial cable.

7. The vehicle-mounted video acquisition system according to any one of claims 1 to 6, characterized in that: The vehicle controller includes an input interface circuit, a deserializer, a voltage output circuit and a processor. The input interface circuit has the same circuit structure as the interface circuit, the first signal end of the input interface circuit is connected to the center conductor of the coaxial cable, the second signal end of the input interface circuit is connected to the input end of the deserializer, the voltage connection end of the input interface circuit is connected to the output end of the voltage output circuit, the output end of the deserializer is connected to the signal input end of the processor, and the control end of the voltage output circuit is connected to the signal output end of the processor.

8. The vehicle-mounted video acquisition system according to any one of claims 1 to 6, characterized in that: The voltage converter is configured to provide corresponding output voltages to at least two output terminals of the output end based on the voltage of the input end, the at least two output terminals include an analog power supply voltage output terminal and a digital power supply voltage output terminal, and the power supply end of the serializer includes a first power supply end connected to the analog power supply voltage output terminal and a second power supply end connected to the digital power supply voltage output terminal.

9. The vehicle-mounted video acquisition system according to any one of claims 1 to 6, characterized in that: The ground terminal of the voltage converter, the ground terminal of the serializer and the ground terminal of the image sensor are all connected to the peripheral ground line of the coaxial cable via the ground terminal of the interface circuit.

10. A vehicle device, characterized in that: The vehicle equipment includes the vehicle-mounted video acquisition system according to any one of claims 1 to 9.

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