Based on DSP,a new method to design a video acquisition system is proposed.Low-cost DSP TMS320F2812(2812) manufactured by TI corporation is adopted to acquire and process real-timely the standard video signal output of CCD.The real-time processing of image accumulation is employed to improve the signal-to-noise ratio of images.It has some advantages such as simple structure,high reliability,high adaptability and high performance-cost ratio.The design of hardware,the flow of software and the method for full speed analog-to-digital conversion of 2812 are described in detail.