【摘要】： 隨著互聯(lián)網技術、信息技術和多媒體技術的不斷發(fā)展,網絡應用的種類越來越豐富,以流式傳輸為特點的流媒體系統(tǒng)逐漸成為研究的熱點。同時,無線網絡研究的發(fā)展以及嵌入式設備在各個領域的廣泛使用,給流媒體應用的研究開辟了新的方向。因此,本文提出了運行在有線和無線環(huán)境下的流媒體系統(tǒng)的設計方案,旨在通過該方案對流媒體技術進行新的研究。 本文設計了可以運行在有線和無線環(huán)境下的支持多用戶并發(fā)使用的系統(tǒng)結構。文中就整個系統(tǒng)的模型、系統(tǒng)工作流程和系統(tǒng)關鍵功能模塊的技術支持和設計細節(jié)做了詳細闡述。在系統(tǒng)中,通過對RTSP協(xié)議工作原理的分析實現(xiàn)了對系統(tǒng)的實時控制功能,包括服務器與用戶端之間的會話控制、媒體流傳輸通道的控制以及類似VCR的控制功能。同時,系統(tǒng)實現(xiàn)了三個層次,即對象間交互式的、媒體流內和流間的同步控制。除此以外基于流媒體系統(tǒng)的商業(yè)應用特征,還實現(xiàn)了對插播廣告時的同步控制。最后,將有線環(huán)境下的用戶端移植到嵌入式系統(tǒng)下,實現(xiàn)了無線環(huán)境下的流媒體應用。 本文通過對該系統(tǒng)設計方案的實現(xiàn),實現(xiàn)了工作在無線以及有線網絡環(huán)境下的流媒體應用系統(tǒng),并通過實驗證實了文中采用的實時控制方案能很好地達到控制的目的;同步控制方案也能很好地完成預定的流內和流間的同步任務,這保證了媒體播放的順利進行;最后移植到嵌入式系統(tǒng)下的用戶端也能按照預期順利地完成各項功能。實驗結果證明了系統(tǒng)設計方案的有效和合理性,為將來更進一步的研究打下了良好的基礎。
[Abstract]:With the continuous development of Internet technology, information technology and multimedia technology, the variety of network applications is more and more abundant. Streaming media system characterized by streaming transmission has gradually become a hot research topic. At the same time, the development of wireless network and the wide use of embedded devices in various fields have opened up a new direction for streaming media applications. Therefore, this paper proposes a design scheme of streaming media system running in wired and wireless environment, which aims to carry out new research on streaming media technology. In this paper, we design a system structure that can run in wired and wireless environments to support multi-user concurrent use. In this paper, the model of the whole system, the workflow of the system and the technical support and design details of the key function modules of the system are described in detail. In the system, the real-time control function of the system is realized by analyzing the working principle of the RTSP protocol, including the session control between the server and the client, the control of the media stream transmission channel and the control function similar to the VCR. At the same time, the system realizes three levels, that is, the synchronization control between objects, media streams and streams. In addition, based on the commercial application characteristics of streaming media system, the synchronization control is also realized. Finally, the client in wired environment is transplanted to embedded system, and streaming media application in wireless environment is realized. In this paper, the streaming media application system working in the wireless and wired network environment is realized through the realization of the design scheme of the system, and the experiment results show that the real-time control scheme can achieve the purpose of the control well. The synchronization control scheme can also accomplish the scheduled tasks of synchronization in and between streams, which ensures the smooth progress of media playback. Finally, the client can finish all functions smoothly as expected when transplanted to embedded system. The experimental results show that the system design scheme is effective and reasonable, which will lay a good foundation for further research in the future.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2008
【分類號】：TN919.8;TP368.12

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