Arm + Dsp Architecture-based Video Processing System

With the increasing of video application in embedded area, the complexity of embedded video system is enhanced and the application scale is enlarged. On the other hand, the duration of designing video products is shortened to get hold of the market. That is, the embedded video system faces the problems with complex functions and short market time. Meanwhile, the development of video scenario and application foreground is promoted by the standard of video compression such as H.264. It is urgent to research the video scenario with high- efficiency, feasibility and re-configuration.The ARM+DSP Video Architecture (ADVA) is one of best methods for the video system whose kernel is embedded operation. ARM has many merits, such as little-size, light-weight, high-reliability, plenty of peripheral interfaces, low-power-consumption etc. It is widely used in automatization area. But there's no floating-point calculatation in hardware module. With special hardware multiplication module and piplines operation, DSP is suitable for the system like video operation. However, the extending application and expanding function of video system are limited by the DSP weakness, such as few of peripheral interfaces, weakness for controlling capability, etc. The advantages of ARM and DSP can be used very well in ADVA. In this architecture, embedded system and video system can work independently at the same time.This thesis elaborates design thoughts and implement principles of video system based ADVA. In this scenario, video system is divided into system control module and video module, which can both be designed and debugged independently. The two modules are connected by HPI. The degree of software and hardware modularization has been enhanced, while the stability and reliability has been increased. The ADVA can meet the function requirement of embedded video system, in the face of increasing complex video application. This thesis has analysed the key problems in ADVA, such as system expansibility, the power supply design of dual-CPU, video data storage, etc. This is instructed for developing video application system. Video system based on ADVA will be in the trend in the future. At last, an embedded video system based on S3C2410 and TMS320VC642 has been designed, and been put into a example, which is Vehicle Data Recorder with functions of the collection,record,replay of video . System hardware design and some device drivers have been completed, too. The successful development will offer a valuable method for embedded video system, and it is good to improve current design status and extending application of video system.