RTP协议标准，RTP 在多点传送（多播）或单点传送（单播）的网络服务上，提供端对端的网络传输功能，适合应用程序传输实时数据.-RTP protocol standard, RTP multicast (multicast) or unicast (unicast) network services, providing end-to-end network transport functions suitable for applications transmit real-time data