嵌入式数字家庭安防视频采集系统设计

Design of Embedded Digital Home Security Video Capture System

针对安防监控系统中视频采集的需求,设计了嵌入式视频采集系统.采用ARM/DSP双核协同工作方式,其中ARM采用三星的ARM微处理器S3C2440,主要实现网络传输和控制功能;DSP采用专用于视频处理的芯片TMS320DM6437,对视频流进行压缩处理,两者通过DSP的主机接口进行通信.网络传输基于RTP协议,根据网络状态调节编码传输速率自适应网络带宽,实现面向服务的QoS控制.实验表明,系统具有成本低、稳定性和实时性好、易于扩展等优点,可用于数字家庭等场所.

For the requirements of video capture in security monitoring system,an embedded video capture system was proposed.ARM/DSP dual-core collaborative work was adopted,in which Samsung＇s ARM processor S3C2440 was used for network transmission and control,DSP processing chip TMS320DM6437 was used for video processing,the two cores com-municate through the HPI.RTP based network transmission adjust coding transmission rate according to network state for adaptive network bandwidth,which realize service-oriented QoS.Experiments show the system has the advantage of low cost,good stability and real-time,scalability and so on and can be used for digital home and other place.