Research And Realization Of DVR Monitored Control System

Now security systems into the network stage with the leading of big data and intelligent network. With the rapid development of embedded system, multimedia and computer network technology, video surveillance as that an important part of the security system has not only been used in public places, but also earned a position at the other private. Video surveillance base on embedded system, with the characteristics of the economic cost, strong networking and real-time, provide timely and intuitive information.Embedded and Linux operating systems is a computer technology hotspot, and the combination of them has become the most widely used. Linux, which there are some characteristics like open source code, the kernel can be streamlined, to support a variety of device drivers and a powerful network functions and so on, is the most widely used embedded operating system. Our design is one application of a binding of both.This design a Linux-based embedded DVR(Digital Video Recorder, Digital Video Recorder) surveillance system. Hass Kit for receiving video driver can not complete analog HD video receiver designed to receive an external video chip kernel driver to control its Hi3520 D for receiving data mode, complete analog HD video reception, allowing video data collected through the camera, after BT.656 interface to transfer data to the receiving chip AD conversion and data preprocessing, and then transferred to the main chip Hi3520 D, the last video playback output interfaces and transmitted over the network. In this process also we need for the questionnaire module can not work together, adding thread design mode, make video input and output, codecs and network transmission module can be run simultaneously. For networked DVR device designed using RTP \ TCP \ IP network protocol combinations of network video surveillance capabilities.This design uses a modular design concept, so that the development of systems be for secondary development. Through testing, each module can function not only implemented separately, can also joint realization. Eventually be able to achieve the desired video monitoring.