Research And Implementation Of Streaming Multimedia Based On Smart Mobile Phones

"Streaming media" is a kind of multimedia applied streaming technology which is transmited in internet. It is played in internet by adopting "streaming transmission mode". This mode firstly processes video and audio in some compress ways in the video server, then continuously sends them to clients. Its real-time transmission's ability helps to achieve download and play simultaneously. So it can achieve a high real-time video transmission. Now streaming multimedia technology is the major method to release media with the rapidly growing internet. At an unbelievable speed, streaming multimedia stands for the trend of internet applications, takes important shares of Internet market with its special fascination and promotes the overall framework of the Internet innovation. It will develop farther with special advantages of data transmission in 3G networks.This paper realizes a wireless streaming multimedia system based on smart mobile phone. At first, it's an introduction of streaming multimedia and MPEG-4 decoding and encoding. Then it's an introduction of the development of the smartphone platform, interface and wireless streaming media framework in the realization of smartphones. This system introduces packet lose processing module with frame layer rate control and error control algorithm while optimizing the client coding algorithm and controlling the server. It overcomes smartphones'shortcomings such as low processing speed, the limited capacity of the buffer and etc. It realizes real-time streaming media transmission. Moreover, the system puts forward an end-to-end feedback congestion control strategy based on RTP protocol, and solves wireless network transmission at high error rate and the time-varying bandwidth issues. With this system, users can receive streaming media at any moment through a wireless network in any place.