Framework of a Remote Surveillance System Based on QoS
一种基于QoS的远程监控系统模型

This paper introduces the framework of a remote surveillance system and key technologies to implement the framework. A codec based on MPEG-4 is developed to encode and decode video. Both ratio and speed of compression of the codec are improved through the optimal designs of motion estimation,quatization and rate control. Error-correction functions added to entropy coding of the codec minimize the loss of quality of images due to transmission error. With a QoS mechanism of transmission and playback based on a simple RTP protocol,this framework is able to adapt bandwidth and to control congestion.