All Digital Visual Intercom System Based On ARM+DSP

With the development of science and technology in our country,people’s demand for economic growth and living standard are continuously improved,also their demand for home environment has become relatively high.At the same time,people gradually found that selecting a visual intercom system has become an indispensable basic equipment in normal life.Due to the choice of the installation of visual intercom system can make people’s normal living standards get better promotion,meanwhile it has guaranteed the safety level of the whole community.As for some traditional access control and monitoring system,its overall design and installation process is complex,and has a high cost of design and installation.It is also very easy to cause the system busy when with a large flow of people,result in the working distance of the whole system is greatly limited.The system itself does not have strong anti-interference ability,and its stability is relatively poor,lead to the system itself cannot have a good compatibility.So in this paper,the visual intercom system based on digitization will occupy a better market competitiveness in the future market..To develop this system can make up for some problems existing in the current visual intercom system.In the paper,the design of the system is completed in a modular way,the hardware and software of the system are designed in detail.The overall structure of the system designed in this paper is the ARM+DSP dual chip structure.The main feature of ARM structure is to control the program,moreover,it can control the audio and video information which will be transferred and sent instructions in this system.The main work of DSP structure is to ensure that the audio and video data can be compressed and decoded.These two can be better combined,and can better play their characteristics.Therefore the design the this project is of good practical value.This paper is to develop an advanced visual intercom system,and the system has been tested and analyzed in detail.Data transmission between ARM and DSP dual chip and data coding are come true in this system.The system better solves the problem of current VGA(640*480)resolution,and it can achieve the video data transmission speed of 30 /second.So the design of this system can better solve the problem of visual terminal system construction.At the same time,the image quality of the system is solved to a great extent,greatly reduce the cost of the system.The scope of its application can be largely expanded in a large range..