Abstract: With the further developments of the Internet,besides the original Internet applications,the application of media stream communication becomes a very important kind of network communication application,which is also  a research focus.Because IP network has some inherent characters such as delay,transmit error,packet loss and bandwidth fluctuation.it can only afford best-effort service,but can not offer guarantee of service quality  for the real time video stream transmission.So it is neeessary to find a new video compression coding and transmitting method that is suitable for the IP network and network based on scalable video coding so as to meet the requirment to some extent.This text introduceds the theory of lifting wavelet and EZW in detail,and presents an scalable video coding combined lifting wavelet and EZW.It can meet the needs of Internet applications such as progressive transmission,gradual image showing,and so on.

Key words: lifting wavelet, EZW, wavelet real-time compression