Application And Study Of Network Public Broadcast Based On Streaming Media Technology

The public broadcast of the intelligence building contains background music, business, urgent broadcast and so on. Generally public broadcast terminals are usually installed further and dispersedly, which consists of different ways to play such as palying continuously and urgent broadcasting. These features choose the transmission way, function requesting and dependability that public broadcast need to analyse.Recently along with the fast development of multi-media techniques, computer networks and the communication techniques, network public broadcast system becomes the hot study that numerous manufacturers pursue to research. The public broadcast system makes use of networks and related equipments (hardware and software) to transmit, deal with and control numerical voice signal in voice expanding and public broadcast systems. The whole system has abilities to solve the problems such as complex circuitry, high cost, signal reducing and so on in the transmission way of analog signal through complete digital process. This paper aims at putting forward the project of network public broadcast system about network voice technique in intelligence buildings. Using the server, the net line, digital trumpet which replace the original console, electric cable and analog trumpet, causing the working method of the traditional public broadcast system to the new working method, giving fully preparation for the development of dependability and function of public broadcast system, being a new network public broadcast system based on streaming media techinique.Streaming Media technique becomes most popular and has fast arisen in the last few years, which is a kind of new technique that adopts the medium data to transmit by flow in Internet and Intranet, realizing multi-media data to be playing continuously. Adopting this streaming media technique resolves problems of limited capacity in digital trumpet, and plays multi-media data in real time. The target of this topic is to design such a network public broadcast server system according to Streaming Media technical.The research contents include:(1) Discuss the structure and the principle of network public broadcast system, and emphasize Server subsystem.(2) Elaborate the concept of streaming media, basic structure and work principle of streaming media technique, media file format, related network protocol and so on. Introduce Microsoft techniques on developing streaming media applications.(3) Discuss to design and realization minimum system of network public broadcast. Introduce the module of collection and streaming.(4) Expand the function of the broadcast system on the foundation of minimum system. Introduce the implementation of background music function, record and remote control.Finally it built up an integrated Server subsystem based on above theoretics and methods.