Research And Implementation Of The Asi-ds3 Network Adapter

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.