Then it focuses on the implementation of service control and adaptive control of media stream under the NGN system with regard to the service and packet transmission related features of NGN.
接下来分别就NGN的业务相关的特点和传送相关特点研究ngn架构下的业务控制与媒体流自适应控制的实现。
When video stream transmitted between different networks, Media Gateway must implement video stream format conversion, protocol process, and resource control.
在异构网络间进行视频通信时，需要通过媒体网关对视频流进行格式转换、协议处理、资源控制。
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