Video overlapping module applied to unmanned aerial vehicle

Abstract

The invention discloses a video overlapping module applied to an unmanned aerial vehicle. The video overlapping module comprises a master controller, a power circuit, a video overlapping chip, a standard video signal simulation output circuit and a video signal output module, wherein the master controller is provided with a sensor expansion interface circuit, a mini SD card interface circuit and a USB interface circuit; the master controller adopts an STM32 microcontroller; and the video overlapping chip adopts DP7456 supporting Chinese. The video overlapping module provided by the invention is more practical, greatly enhanced from a hardware structure to a software system design compared with the traditional video overlapping module, can be applied to special unmanned aerial vehicles such as aerial survey unmanned aerial vehicles, aerial photographing unmanned aerial vehicles and investigation unmanned aerial vehicles.

Description

technical field [0001] The invention relates to the field of video processing, in particular to a video superimposition module applied to drones. Background technique [0002] Video overlay OSD (On Screen Display) is to overlay date, parameters and other information on the original video. This technology is applied to drones, which can superimpose flight data on the output video of the camera, and then transmit it to the receiving end through the image transmission system (referred to as image transmission), which is usually used for FPV (First Person View). The receiving end intuitively understands the flight status of the aircraft through real-time images and flight data. [0003] At present, the most used video overlay modules at home and abroad are all originated from the minimosd project on Google. The project version ended in 2012, and the final version number is 2.0. Due to the technical limitations of that era, the hardware solution used Atmel's 8-bit microprocesso...

AI Technical Summary

Problems solved by technology

The project version ended in 2012, and the final version number is 2.0. Due to the technical limitations of that era, the hardware solution used Atmel's 8-bit microprocessor ATMEGA328 as the main control chip, and the video character overlay chip used Maxim ) company’s MAX7456, the current existing technology still uses the hardware structure and software system of this video overlay module, because of the lack of internal resources, the function only completes the reading of flight data and superimposes it on the image, and does not support Chinese display. After reading the data, the operator needs to go through a series of conversions to know the current flight status of the drone

Another disadvantage of this video overlay module is that it cannot superimpose video information normally when the image transmission signal is lost or the image transmission system fails, so this module needs to power on the camera first or both at the same time

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