Research And Development Of Airborne Multi-channel Digital Video Recording System

In order to solve the problem of recording important Video information during flight,an airborne multi-channel Digital Video Recorder(DVR)system based on Zynq Ultra Scale+MPSo C series chip was adopted,which has the function of video data acquisition,compression and storage.In the aircraft cabin environment,the aircraft multiplex video data is recorded,so as to reflect the aircraft operation status,after the flight is over,for ground researchers to analyze.The research content of this paper mainly includes the following points:(1)Aiming at aircraft cockpit display data recording,this paper designs a scheme of multi-channel digital video recording system.H.264/AVC video coding standard is used as the core video compression algorithm to solve the problem of large data storage.The system is designed by combining software and hardware,and its applicability,stability and expansibility are discussed.(2)Develop a hardware platform with Zynq as the main control chip according to the functional requirements of the system.On the premise of fully studying the functions of each IP core,Vivado is used to develop software to complete the hardware logic design of the video acquisition module,video compression and coding module,video storage module,and comprehensively realize the whole logic engineering.(3)Developed embedded Linux software on the basis of hardware logic design.The acquisition,coding and storage components in Gstreamer framework are connected into video processing pipelines.Using Petalinux software to write relevant device tree code,compile the kernel,load the driver,realize the hardware configuration and control of the system,and complete the software design of the system.Through the actual test of the airborne multichannel digital video recording system,the system can collect 4 channels of video data with a resolution of 1920×1080 HDMI,compress the video data and store it in the solid-state hard disk.The data in the hard disk can be decoded and played back through VLC software,and the video has no obvious lag phenomenon,which has certain engineering application value.