目前，能够传输高品质视频信号的两种总线接口（ＵＳＢ和ＩＥＥＥ １３９４接口）都支持即插即用，且具有易扩展、使用方便等特点。但是ＩＥＥＥ １３９４接口的价格相对较高，因此，当前采用更多的是ＵＳＢ接口。-At present, be able to transmit high quality video signals of the two bus interfaces (USB and IEEE 1394 interface) support the Plug and Play, and

The project aims to provide a robust hardware solution towards blind navigation in mass-transit, crowded public transportation systems (airports, bus stations, railways, etc.). The IEEE 802.15.4/Zigbee based transceiver and RFID tags would be used to