基于SIP乘客信息系统的列车语音控制单元设计与实现

In order to adapt to the requirements and higher performance of train passenger information system, a design scheme of Passenger Information System based on SIP (Session Initiation Protocol) is proposed. In the scheme, a detailed solution for the train intercom and broadcast based on SIP is introduced. The software structure and unit modules of audio control unit are implemented. In order to test the scheme, a test platform of train passenger information system is built, and the system test shows that the train audio control unit can complete all the preset functions well.