高性能600MHz的TMS320DM642是可编程的数字多媒体处理器，为了了解其对于多媒体数据通信的支持，本文针对DSP芯片上的网络开发工具NDK进行了研究，测试了其在UDP传输过程中的CPU效率，对其在不同传输速率和二级缓存大小的条件下的表现给出了比较。说明了DM642是一款很适用于多媒体通信的数字信号处理器-The TMS320DM642 is a 600MHz high-performance programmable digital multimedia processor, in order to understand their data communication for multi-media support, this article on a chip for DSP development tools NDK Network conducted a study to test its presence in the UDP transmission efficiency of the CPU its at different transmission rates and secondary cache size is given under the conditions of performance are compared. Describes the DM642 is a very applicable to multimedia communications, digital signal processor