Remote video monitoring has become increasingly important for monitoring the security of purpose locations. Most of the surveillance system needs high-definition (HD) video. Multi-channel HD video data real-time transmission and data transmission security are two of the factors restricting the development of remote monitoring system. To solve this problem, this paper presents a new high-definition video surveillance system program, high-definition camera video by video relay input to high-definition video encoder, high-definition video encoder for data compression, compressed data input HD video decoder after long-distance transmission by Gigabit Ethernet, high-definition video decoder to decode the compressed data, then the video data input DVR after decompression, the video data may be stored and can be displayed in real time. A balanced algorithm is used to adapt transmission bandwidth and a iterative algorithm is used to smooth out random packets loss rate. After testing, the system can transmits five hundred compressed video data and have excellent expansibility; data transmission is very secure because of independent Ethernet and encryption algorithm.
KEYWORDS: Cameras, Field programmable gate arrays, Video, Imaging systems, Video processing, Data conversion, Signal processing, RGB color model, Digital signal processing
CameraLink technology is a high-speed serial data connection standard widely applied in industrial cameras. In order to realize the displaying and processing of video based on industrial cameras with CameraLink interface, this paper has presented a video protocol conversion system based on Altera’s Cyclone Ⅲ FPGA. The system is able to convert CameraLink video outputted from the camera into High Definition Multimedia Interface (HDMI) signals for displaying. The system consists of power module, CameraLink receiver module, FPGA, as well as HDMI output module. The PCB of the system is designed with Altium Designer 16 and the software is designed on the Quartus II platform using Verilog HDL. The FPGA accomplishes CameraLink signal processing, color space conversion from RGB to YCbCr 4:2:2 and HDMI output chip configuration. The experiment results show that this system is stable enough that can reliably achieve HDMI video displaying, which is able to be applied to video displaying of industrial cameras with CameraLink interface.
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