The overall design of a video surveillance system based on FPGA is presented in this paper. The system begins with the configuration of the video processing chip using an I2C bus module implemented in FPGA. Following that, the video signal processing flow is outlined. The processed video data is stored in an SDRAM buffer using a ping-pong mechanism to ensure continuous and efficient data handling. Finally, the video is sent to a VGA display according to VGA timing specifications. The system was developed using Verilog HDL, simulated with Modelsim, and deployed on a Virtex-II XC2VP30 FFG896 development board.
A typical video surveillance system includes components such as a light source, camera, video conversion unit, digital image transmission and control system, input/output units, and a monitor. Traditional systems rely on industrial PCs and video acquisition cards, which are often expensive and less stable. In contrast, FPGAs offer advantages such as shorter design cycles, flexibility, and improved reliability and integration. Combined with the ease of use of Verilog HDL, which resembles the C language, this paper proposes a more efficient and cost-effective video surveillance system based on FPGA.
The system is divided into five main functional modules: the video interface module, video conversion module, asynchronous FIFO module, image storage module, and VGA control module. Each module plays a crucial role in ensuring smooth operation and high-quality video output.
The video acquisition module uses the SAA7113 chip, which can be configured via the I2C bus to capture video signals in different formats. The video conversion module decodes the incoming video stream, identifies synchronization signals, and converts the YUV data to RGB format for display. The asynchronous FIFO module helps manage the clock mismatch between the video processor and SDRAM, ensuring seamless data transfer. The image storage module uses a ping-pong mechanism to store and retrieve video frames efficiently. Lastly, the VGA control module generates the necessary synchronization signals for proper display on a VGA monitor.
The design also covers the working principles of SDRAM and its controller, as well as the implementation of the VGA interface using the FMS3818 DAC. The hardware connections between the camera, FPGA, SDRAM, and VGA display are described in detail.
This system demonstrates the potential of FPGA-based solutions in video surveillance, offering flexibility, scalability, and real-time performance. It can be further enhanced by integrating additional algorithms for tasks such as pattern recognition or object detection.
Tinned Copper Wire,Tinned Copper,Tin Coated Copper Wire,Tin Plated Copper Wire
Sowell Electric CO., LTD. , https://www.sowellsolar.com