【摘要】 文中介绍了基于QL5032的PCI总线控制器的DVBTS(传输流)发送卡的构成及其应用,并给出了发送卡的硬件设计和软件设计的实现方案。数据经由PCI桥上的DMA控制器从PC系统内存传送到DVB-ASI发送卡上的输入缓冲,随后对字节进行8B/10B编码,接着使这些10比特字通过以固定输出比特率270Mb/s工作的并/串交换器。最后,通过标准DVB输出接口将计算机内的MPEG2传输流数据以指定的速率发送给各种数字视频设备。更多还原

【Abstract】 In this paper, we introduce the design and implementation of the sending card For DVB TS Based on QL5032’s PCI Bus-controller. Then the implementation scheme of hardware and software of the sending card are described. Data are send from PC system memory to the input buffer of DVB-ASI sending card through DMA controller on PCI bridge and bytes are coded with 8 B/10 B coding, and these ten byte words will be transited to a parallel / serial exchanger which works on fixed output bit rate 280 Mb/s. Finally, through standard DVB output interface, MPEG 2 transmission stream data are sent to various data video equipment according to assigned speed.更多还原