摘要： 在图像处理中单片DSP往往无法满足实时性要求，而需要多DSP进行协同工作。该文针对图像信号的特点以及DM642视频接口原理，设计了多DM642处理系统中视频接口的有效扩展。设计中利用FPGA进行数字视频信号的预处理，并根据具体的系统实现了视频数据的分流，同时提供了DM642视频接口的无缝连接。该设计大大提高了DSP系统的数据吞吐能力及并行处理能力，有效地解决了DSP在高数据带宽应用中的瓶颈。

关键词: DM642, 视频接口, 多处理器, FPGA

Abstract: During image processing, a single DSP sometimes couldn’t meet the need of real-time, thus it is needed to use multiple DSPs to cooperation. According to the features of image signal and the principle of DM642 video port, the paper provides an available video port expansion based on multiprocessor. In the design, FPGA is used as preprocessing of digital video signal and realizes the flow-distribution of video data. In the mean time, FPGA provides the seamless connection with DM642 video port. The design greatly improves the DSP system’s throughput and concurrent processing abilities. It effectively solves the bottleneck during high-bandwidth application using DSP.

Key words: DM642, Video port, Multiprocessor, FPGA