ASI-DS3网络适配器的研究与实现

【作者】 谢由超；

【导师】 钟洪声；

【作者基本信息】 电子科技大学 ， 信号与信息处理， 2005， 硕士

【摘要】 随着数字电视技术的成熟,尤其是DVB 系列标准的推行,数字电视信号在信源基带数据和信道传输等方面进一步标准化,数字电视传播途径也越来越广,在卫星、地面及有线电视网中传输数字电视信号都到迅速发展。SDH 网络的众多优点,使它在数字电视的传输中脱颖而出,在数字电视的传输过程中担任重要的角色。本文在研究现有的数字电视网络和各种网络适配产品的基础上,提出了连接数字视频设备与SDH 传输网络的ASI-DS3 双向网络适配器的解决方案,应用了嵌入式ARM 芯片、cyclone 系列FPGA、专用ASI&DS3 接口芯片和相关的开发软件,实现了帧同步、空包过滤、RS 编解码、交织/解交织、PCR 的校正等功能,完成了适配器方案设计、硬件原理图设计、PCB 设计、软件开发到产品调试、上SDH 网试验等过程,达到了与国内外多种DS3 协议适配的良好效果。更多还原

【Abstract】 Based on the maturation of digital TV technique, especially releasingDVB(Digital Video Broadcasting) series standards, digital TV signal has been furtherstandardized in the aspects such as baseband source-signal data and channeltransmission. The transmission methods of digital TV become wider and wider, suchas satellites, earth land and CATV networks are developing quickly. The numerousadvantages of SDH(Synchronous Digital Hierarchy) network ensure it outstands outof other digital TV transmissions, and plays an important role.According to the research in the existing digital TV networks and some kinds ofnetwork adapter products, this paper offers a project of ASI-DS3 bidirectionalnetwork adapter that connects digital video equipments and SDH transmissionnetworks. Many techniques for example embed ARM, the cyclone series’FPGA, theinterface IC of ASI&DS3 and the corresponding software, are applied in this project,which realized some kinds of functions, like as frame synchronization, invalid packetsfiltering, RS code/decode, interweave/de-interweave, PCR(Program Clock Reference)correction, etc. Many work and designs are compolected in this project, such as theframe design, the hardware schematic diagram design, the PCB design, and thesoftware design, also completed production debugging and testing in SDH networks.The production can connect with many DS3 network protocols.更多还原