32-port Video Matrix System Design

The extensive use of the Easy-police Recorder in current society has brought great challenges to the recorder data management. In this thesis, we carried out the research of video matrix system for Easy-police Recorder DS-OIC and DS-IE. A new data management system model is proposed, it achieves to read the data recorder automatically and manage the data intelligent. By using the distributed data storage, the agencies with permission can share the data though the network. The system accomplished the reading and management of the data in Easy-police Recorder. The system connected the recorder and the host computer in USB, and implemented uploading the data of the recorder automatically by hardware circuit. By using of Qt platform, the data uploaded by USB is written to the database and managed in a unified rules, meanwhile the audio and video file completed format conversion. The circuit is divided to several blocks, using the cy7c68013microcontroller as the core control module, the XC3S50AN of the Xilinx company as10expansion module to control the state of high speed USB switch TS3USB221E.This thesis also describes the design process of FPGA and MCU, and focuses on the realization of SPI communication between FPGA and MCU. It analyses the structure of the USB switch module and the design of the hardware power module, at the time introduces the design of PCB, and shows the completed PCB design figure. Qt signal-slot mechanism and multi-threading mechanism are introduced briefly, the software is divided to several blocks, each block’s function is briefly described. The user interface designed by QWidget, the work of Qt state machine, the processing of the OpenC V library for image and video and the basic operation of Qt database are performed.Many tests have been down, the results show that the system has a high stability and practicality. The video matrix system has been used commercially at present.