介绍了一种基于Nios II的运动视频检测片上系统,该系统通过采用软/硬件协同设计的方法,使用Altera EP2C35 FPGA芯片与HV7131R视频摄像头配合实现了高速的数字视频处理,选用SDRAM和FLASH作为视频数据的外部存储器,满足了运动检测和保存运动现场的需要。并且采用Verilog HDL和Nios II定制指令使用硬件实现了系统的大部分功能,提高系统的处理速度,同时具有良好的灵活性和适应性。 This paper introduces a Nios II-based motion video detection system-on-chip, which uses high-speed digital video processing with the Altera EP2C35 FPGA and HV7131R video camera by adopting the software / hardware collaborative design method. SDRAM and FLASH are selected as the video The external memory of the data meets the needs of motion detection and preservation of the scene of the movement. And use Verilog HDL and Nios II custom instructions to use hardware to achieve most of the system functions, improve system processing speed, and has good flexibility and adaptability.