VLC系统在室内视频传输中的应用

摘要

In order to realize a rapid and safe access mode between equipments, the Ethernet video transmission and indoor visi-ble light communication principle are combined to achieve a one-way visible light video transmission system. This paper puts for-ward a method using 4B5B, NRZI and UDP protocol, then uses the CDR (Clock and Data Recovery) chip to recovery synchronous clock and data. Finally, it designs a transmitting circuit and receiving circuit, and tests the performance of CDR and overall system. The results demonstrate that the system based on 4B5B can realize video transmission at 1M distance.%为了实现设备之间快速、安全的通信接入，将以太网视频传输与室内可见光通信原理相结合，实现了单向可见光视频传输系统。提出了对视频数据进行4B5B和NRZI编码，利用UDP协议进行传输，并由CDR（Clock and Data Recovery）芯片恢复同步时钟数据。最终，设计了发送电路和接收电路，并对时钟恢复和系统整体性能进行了测试。测试结果表明，基于4B5B编码的可见光视频传输系统可以实现1M距离以内的以太网视频传输。