数字视频广播传输流接收专用芯片的设计  

ASIC design of DVB transport stream receiving chip

作　　者：贺光辉[1] 俞伟[1] 赵行波[1] 周祖成[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2007年第1期53-56,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高技术项目(2002AA1Z1380)

摘　　要：为了满足计算机能够接收数字视频广播(DVB)内容的需要,针对DVB传输数据量大,实时性要求高的业务特性,提出了一种DVB传输流接收专用芯片的设计。按照自顶向下的设计流程,通过合理划分软硬件结构,围绕高速数据通道的设计,采用流水线结构和链式直接存储器访问(DMA)的方式来提高数据处理速度,并利用理论建模的方法定制链式DMA的参数以及系统缓存大小。实验结果表明:链式DMA策略的硬件带宽达到476.6 Mb/s,为传统DMA方式的25倍,有效提高了接收芯片的数据处理能力。该芯片已采用Fujitsu 0.35μm的CMOS工艺流片。In order to receive digital video broadcasting （DVB） program with computer, this paper presents an application specific integrated circuits （ASIC） design of DVB transport stream receiving chip based on PCI interface. Hardware-software partitioning strategy is based on real-time requirement and complexity profiles of DVB system. Data path architecture is focused on the design of high-speed channel to improve the bandwidth. Furthermore, the parameters of chaining mode direct memory access （DMA） and the depth of buffer are optimized by theory analysis. The result indicates the bandwidth of chaining mode DMA is up to 476.6 Mb/s, which is 25 times as much as original DMA strategy. The chip can enhance the ability of receiving data and has been fabricated in 0.35μm CMOS process of Fujitsu.

关 键 词：专用集成电路 数字视频广播 直接存储器访问 

分 类 号：TN492[电子电信—微电子学与固体电子学]