In image processing

large image data need be exchanged among memories

so the transmission of image data is key link in image capture and processing system. EDMA is important technology in DSP that is used to realize the rapid exchange data

and it has the ability of transmission data that isn't dependent on CPU. In this paper

the video signal capture and processing system is designed based on TMS320DM642 chip of TI company. And in the system the EDMA data transmission mode is utilized to realize the high-speed and real-time transmission for the video signal data. The combination with the EMIFA of DSP and FIFO storage of the FPGA which is used in the data transmission is introduced in this paper

and the design of overall structure and the function of logic control are analyzed. Especially the principle

realization method and application based on the EDMA Ping-Pong data transmission mode is analyzed. In addition

the program of EDMA interrupt service is used in the image to process the moved image data

and the CPU is mainly used in video signal proce-ssing and system function control. This method not only improved the transmission efficiency of the data but also make the high-speed performance of DSP get full application

so as to lay a foundation for the real-time performance of video signal processing.