Research and development of the onboard digital multimedia system for subway

As using IT systems that can efficiently plan trains, manage operations and provide passengers with information, the art of state of onboard digital multimedia system is introduced. The structure and main functions of onboard digital multimedia System for subway are described. The Media Controller, audio communications, video display, content management, CCTV Surveillance and communications interface are designed in this paper. The video decoder steps and Software hierarch of Media Player are introduced. The proven complete onboard digital multimedia solutions have been successfully implemented in some city subway.The onboard digital multimedia solutions can also operate in a variety of public mass transit transportation modes.