Vehicle-mounted video conversion and switching module

Abstract

The utility model discloses a vehicle-mounted video conversion and switching module, and belongs to the technical field of vehicle-mounted videos. Comprising a video acquisition circuit which is used for receiving two paths of video signal input and carrying out deserialization processing on video signals; the analog switch circuit is electrically connected with the video acquisition circuit and is used for switching and selecting the two paths of video signals obtained by de-serialization processing; the master control MCU circuit is electrically connected with the analog switch circuit and is used for controlling the analog switch circuit to select to output the first-path video signal or the second-path video signal; and the video output circuit is electrically connected with the analog switch circuit and is used for carrying out signal conversion on the selected output video signal and outputting the video signal. According to the utility model, a video signal conversion function and a video input signal switching function are integrated together, a user can select and control the switching function of two paths of video signals, and finally one path of video signal is output through video signal conversion, so that the switching is faster and more reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted video, and particularly relates to a vehicle-mounted video conversion and switching module. Background Art

[0002] The vehicle-mounted video conversion module is an important part of modern automotive electronic systems. It is responsible for converting various video sources into a format suitable for use on vehicle-mounted displays. The main function of the vehicle-mounted video switching module is to switch between multiple video sources and output the selected video signal to one or more displays. These video sources may include built-in cameras, navigation systems, rearview cameras, etc. With the continuous development of automotive intelligent systems, the technology of vehicle-mounted video conversion modules has also undergone significant evolution. The following are some key background technologies:

[0003] 1. Serialization and deserialization technology

[0004] Serializer and deserializer technologies play a core role in vehicle-mounted camera systems. They are responsible for converting parallel data into high-speed serial data for long-distance transmission, and then restoring the serial data to parallel data at the receiving end. This technology reduces the number and weight of cables, improves transmission efficiency and anti-interference ability.

[0005] 2. AVT video transmission technology

[0006] AVT technology, full name Advanced Video Transmission technology, as a digital coaxial high-definition video transmission technology, with its superior image performance and outstanding system characteristics, fully supports the visual lossless and real-time transmission of vehicle-mounted high-definition video devices. AVT technology was initially developed by Realtek. It mainly uses the LVDS (Low Voltage Differential Signaling) principle to achieve long-distance, low-power, and low-cost digital video signal transmission.

[0007] 3. Video output interface

[0008] Vehicle-mounted video displays may use different video interface standards, such as HDMI (High-Definition Multimedia Interface), DisplayPort, VGA (Video Graphics Array), etc. These standards define the physical connection, electrical characteristics, and data transmission protocols of video signals.

[0009] 4. Video format compatibility

[0010] The vehicle-mounted video conversion and switching module needs to be able to identify and process video signals with different resolutions, frame rates, and encoding formats to ensure compatibility with various video sources.

[0011] 5. Video processing

[0012] The module may contain a video processor internally, which is used for functions such as scaling, cropping, format conversion, and quality enhancement. For example, adapting high-definition video signals to screens of different sizes, or upgrading low-resolution signals to higher clarity.

[0013] 6. Multiplexing and Switching Control

[0014] The core function of the switching module is to be able to intelligently select and switch video sources. This usually involves hardware switches and software control logic to ensure that the correct video source is displayed at the correct time.

[0015] 7. User Interface and Control

[0016] Users can control the switching of video sources through physical buttons, touchscreens, or voice commands. The control logic needs to be simple and intuitive to reduce driver distraction.

[0017] 8. Safety Features

[0018] For safety-related video sources, such as reverse cameras, the switching module requires a priority mechanism to ensure that the relevant video source is automatically displayed under specific circumstances, such as immediately showing the rear view when the vehicle is in reverse gear.

[0019] Currently, in-vehicle video conversion and switching devices are mainly for automotive use, for switching video devices such as in-vehicle surveillance cameras and reverse rearview mirrors. For some cars or special-purpose vehicles with only one video display device in the vehicle on the market, it is necessary to switch the video display to observe multi-directional surrounding environment information.

[0020] In the patent CN201810026419, "An In-vehicle Video Switching Method and Switching Device", a video automatic switching scheme is provided. The video switching device in this scheme judges the monitoring signal through a software communication protocol processing module to control the relay for switching the video signal for output display. The disadvantage of this scheme is that using a relay for signal switching has poor reliability, the judgment and processing of video signals are complex, and the video switching delay is long, reducing the user experience. Utility Model Content

[0021] To solve the problems of the existing technology, the present utility model provides an in-vehicle video conversion and switching module, including:

[0022] A video acquisition circuit, which is used to receive two-way video signal inputs and perform deserialization processing on the video signals;

[0023] An analog switch circuit, electrically connected to the video acquisition circuit, which is used to switch and select the two-way video signals obtained from the deserialization processing;

[0024] The main control MCU circuit, electrically connected to the analog switch circuit, is used to control the analog switch circuit to select and output the first or second video signal;

[0025] The video output circuit, electrically connected to the analog switch circuit, converts and outputs the selected video signal.

[0026] Furthermore, it further includes: a power supply circuit, electrically connected to the video acquisition circuit and the main control MCU circuit, for providing a suitable working voltage.

[0027] Furthermore, it further includes: an AVT camera, electrically connected to the video acquisition circuit, for inputting two AVT video signals to the video acquisition circuit.

[0028] Furthermore, the main control MCU circuit controls the analog switch circuit through keys or RS422 communication commands.

[0029] Furthermore, it further includes: a display terminal, electrically connected to the video output circuit, for converting the selected AVT video signal output by the video output circuit into a VGA video signal and then displaying it.

[0030] Furthermore, the video acquisition circuit, the analog switch circuit, the main control MCU circuit and the video output circuit are assembled on the surface of the circuit board and attached with heat dissipation fins.

[0031] The beneficial effects brought by the technical solution provided by the embodiment of the present utility model are as follows: First, in the present utility model, the video signal conversion function and the video input signal switching function are integrated. Two video signals are collected through the input interface. Then, the user can select to control the switching function of the two video signals. Finally, after video signal conversion, one video signal is output to a display or other display control terminal. The switching of the two video input signals is realized by using an analog switch, and the switching is faster and more reliable, and the user experience is good.

[0032] In addition, the main control MCU circuit controls the analog switch circuit through keys or RS422 communication commands. During use, the user can choose to use a hardware physical switch or RS422 communication commands to control the switching function of the two AVT video signals. Finally, after video signal conversion, one VGA video signal is output to the display terminal. The switching function provides multiple control methods for the user to choose by themselves to be applicable to different application scenarios. Description of the Drawings

[0033] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0034] Figure 1 is the architecture diagram of a vehicle-mounted video conversion and switching module provided by the present utility model;

[0035] Figure 2 is the flowchart of a vehicle-mounted video conversion and switching method provided by the present utility model;

[0036] Figure 3 is the structural schematic diagram of a vehicle-mounted video conversion and switching module provided by the present utility model;

[0037] Reference numerals: 1 - circuit board; 2 - heat dissipation fins. Detailed implementation manners

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0039] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will further describe the embodiments of the present utility model in detail with reference to the drawings.

[0040] See Figure 1 and Figure 3 , a vehicle-mounted video conversion and switching module, includes: a video acquisition circuit, an analog switch circuit, a main control MCU circuit, and a video output circuit.

[0041] Among them, the video acquisition circuit can be an NS2521 video acquisition circuit, the analog switch circuit can be an RS2299XTQC16 analog switch circuit, the main control MCU circuit can be an STC15W4K32S4 main control MCU, and the video output circuit can be a CV2880 video output circuit.

[0042] The video acquisition circuit receives one or two video signal inputs from surveillance cameras, and deserializes the video signals to the subsequent integrated circuit; the analog switch circuit is electrically connected to the video acquisition circuit and the main control MCU circuit, and the main control MCU circuit controls the analog switch circuit to switch and control the analog switch circuit. The analog switch circuit receives an on or off signal sent by the main control MCU, and switches and selects the two video signals obtained by the deserialization process to select the first or second video signal for output; the video output circuit is electrically connected to the analog switch circuit, and the video output circuit converts and outputs the selected video signal, and the signal conversion utilizes digital / analog, parallel / serial conversion, etc. to implement the processing process.

[0043] It is worth mentioning that the utility model integrates the video signal conversion function and the video input signal switching function together, collects two-way video signals through the input interface, and then the user can choose to control the switching function of the two-way video signals. Finally, after the video signal conversion, one video signal is output to the display or other display control terminal. The analog switch is used to realize the switching of the two-way video input signals. The switching is faster and more reliable, and the user practical experience is good.

[0044] In addition, the design module takes up little space, is easy to integrate, and is convenient for installation of vehicle-mounted video processing terminal equipment; it is also simple to operate, making it more convenient for users to use.

[0045] Furthermore, the vehicle-mounted video conversion and switching module also includes: a power supply circuit, which is electrically connected to the video acquisition circuit and the main control MCU circuit to provide a suitable working voltage.

[0046] Furthermore, the vehicle-mounted video conversion and switching module also includes: an AVT camera. For the AVT camera used in the vehicle-mounted video terminal, there are few corresponding video conversion devices on the market. The vehicle-mounted video conversion and switching module in this application can place the position of the AVT camera according to the actual application scenario, such as a close-up camera and a long-range camera. The driver can switch the displayed video screen as needed, which is convenient for the driver to observe and operate.

[0047] In addition, the video output circuit is also electrically connected to a display terminal. The video output circuit converts the selected AVT video signal, converts the AVT lossless 1080p30 frame video format into a VGA video signal of the same format and outputs it to the display terminal, supporting high-definition video format output display.

[0048] Further, in the present utility model, the main control MCU circuit controls the analog switch circuit through buttons or RS422 communication commands. During use, the user can choose to use the hardware physical switch or RS422 communication commands to control the switching function of two AVT video signals. Finally, after video signal conversion, a VGA video signal is output to the display terminal. The switching function adopts multiple control methods for the user to choose by themselves to be applicable to different application scenarios. During the driver's driving process, it is convenient to access the AVT camera and switch the video output manually or automatically, enabling the driver to concentrate on driving, solving the trouble of the single method for AVT video signal display and in-vehicle video switching, and being safer and more convenient.

[0049] Further, the video acquisition circuit, the analog switch circuit, the main control MCU circuit, and the video output circuit are assembled on the surface of the circuit board and attached with heat dissipation fins to facilitate heat dissipation and increase the service life of the product.

[0050] The serial numbers of the above embodiments of the present utility model are only for description and do not represent the advantages or disadvantages of the embodiments.

[0051] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A vehicle-mounted video conversion and switching module, characterized in that: include: The video acquisition circuit is used to receive two-way video signal input and perform deserialization processing on the video signals; An analog switch circuit, electrically connected to the video acquisition circuit, for switching and selecting two video signals obtained by deserialization processing; A main control MCU circuit is electrically connected to the analog switch circuit and is used to control the analog switch circuit to select the output of the first channel or the second channel video signal; The video output circuit is electrically connected to the analog switch circuit, and performs signal conversion on a video signal selected for output and outputs the signal.

2. The vehicle-mounted video conversion and switching module according to claim 1, characterized in that: Also includes: The power supply circuit is electrically connected to the video acquisition circuit and the main control MCU circuit, and is used to provide a suitable operating voltage.

3. The vehicle-mounted video conversion and switching module according to claim 1, characterized in that: Also includes: AV The T camera is electrically connected to the video acquisition circuit and is used to input two channels of AVT video signals to the video acquisition circuit.

4. The vehicle-mounted video conversion and switching module according to claim 1, characterized in that: The main control MCU circuit controls the analog switch circuit through buttons or RS422 communication commands.

5. The vehicle-mounted video conversion and switching module according to claim 3, characterized in that: Also includes: The display terminal is electrically connected to the video output circuit and is used to convert the AVT video signal selected and output by the video output circuit into a VGA video signal for display.

6. The vehicle-mounted video conversion and switching module according to any one of claims 1 to 5, characterized in that: The video acquisition circuit, the analog switch circuit, the main control MCU circuit and the video output circuit are assembled on the surface of the circuit board and attached to the heat dissipation fins.

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