新型DVB码流监控仪的设计与实现 

\DVB码流监控仪是数字视频广播系统的开发和运行中的重要调试工具和监测仪器，用来检验传输流是否符合MPEG2 ISO/IEC 138181{SYSTERM}标准。传统的码流分析仪都是基于PC硬件平台的，价格昂贵，操作不便。提出了一种新的DVB码流监控仪实现方案，硬件基于现场可编程门阵列，完成码流缓存和接口转换，软件基于嵌入式软核Nios，完成DMA传送按键控制、LCD显示以及应用程序对DVB码流的分析与检错。提出的码流监控仪价格低廉，操作方便，便携性好，与传统码流分析仪相比，具有较高的性价比。

Design and implementation of a new DVB stream monitor

DVB stream monitor is an important debugging and monitoring tool during the development of DVB system. It is used for checking whether transport streams are in accordance with the MPEG-2 ISO/IEC 13818-1{SYSTERM} standard. Traditional instruments are usually based on PC and always costly and difficult to use. This paper introduces a new systematic scheme for the implementation of DVB stream monitors. The hardware design is based on field programmable gate array which helps to deposit the DVB stream and make a transformation between different interfaces. The software design is based on the embedded soft-core Nios to accomplish DMA transfer, key press control, LCD display and analysis and checking of DVB stream. Compared with traditional instruments this DVB stream monitor has a higher ratio of quality to price.