Design And Implemetation Of A Streaming Audio Media Player Based On Embedded Linux

With the development of network technologies, the performance of IP networks gets great improvement. At the same time, compression technologies make the data size of multimedia much smaller. As a result, real time transmissions of audio multimedia over networks can be realized. As more and more traditional radio stations use computer networks as media of broadcasting, the device that can receive audio media from radio stations over networks as the traditional radio receiver does is needed. With the development of embedded technologies, embedded systems that can receive media information from remote radio stations over networks become possible.Firstly, the dissertation discusses the design of a real time transmission client framework of audio multimedia based on embedded Linux operating system. Secondly, the dissertation describes the implement of MPEGI-LayerIII audio stream receiving and playing process via real time protocol. Thirdly, based on analysing the distribution of packets delay time, strategy is designed to reduce the jitter of audio streams, and test indicates that the strategy work well and the system get better performance; in addition, a new real-time protocol based on HTTP tunneling is designed to cross firewalls in the complex network enjoinments. Performance proves that this system has better applicability and real-time characteristic. At last, the dissertation also presents further work in funture.