先介绍了USB系统，重点阐述了USB的通信模型和USB的通信协议，并且对USB的传输方式也做了详细的叙述。接着在详细分析了USB系统的基础上，围绕着数字电视信源的特点对DVB Application整体设计进行了描述。最后对DVB Application的硬件部分、固件部分、驱动程序部分和应用软件部分的设计和开发进行了详细的介绍，并且结合实际的运行情况对DVB Application提出了改进意见。-first introduced the USB system, focusing on the communication model of USB and USB communication protocol, USB and the right means of transmission have also done a detailed descr iption. Then in a detailed analysis of the USB system on the basis of Digital TV around the source and the characteristics of the DVB Application overall design was described. Finally, the DVB Application of the hardware, firmware, Driver segment and the application software part of the design and development of a detailed presentation and the light of the actual operation of the DVB Application suggesting improvements.