本科毕业设计-基于智能手机的流媒体客户端研究与实现.doc

南 京 邮 电 大 学 硕士学位论文摘要 学科、专业：信号与信息工程 研 究 方 向：语音处理与现代语音通信PC的互联网应用开始延伸至移动平台，流媒体点播业务就是其中之一。流媒体（streaming media）是指将一连串的媒体数据后，经过分段，在网络上即时传输以供观赏的一种技术与过程，使得数据包像流水一样发送，就必须在下载整个媒体文件。流式传输可现场或预存于上的影片，当在收看这些时，数据在的后立即由特定播放 Abstract As the growing popularity and performance of smart phones, smart phones-based mobile media streaming applications become increasingly popular. Streaming media are multimedia that are constantly received by, and normally presented to, an end-user while being delivered by a streaming provider. The name refers to the delivery method of the medium rather than to the medium itself. Before the birth of streaming media, videos must be fully downloaded before end-user want to watch videos. Streaming enables users to watch live or stored video on the media server. This paper has designed and developed mobile streaming media client based on Windows Mobile platform. First, it introduces the basic concept of streaming media technology and the relevant industrial standards, etc. Then study the streaming media system and the media codec technology, basic principles and standards. Other than good study of the Windows Mobile platform, the key components such as FFmpeg and SDL also have been discussed. Thereafter a detailed description of system deployment has been presented. Finally, we describe the system architecture and key components, and focus on the design and implementation of the mobile streaming client. After the tests in TD-SCDMA environment, the results demonstrate that the client obtain better playback quality and user experience. Key Words: Streaming Media, Smart Phone, Windows Mobile, RTP 目录 摘要 I Abstract II 目录 III 第一章 绪论 1 1.1项目研究背景 1 1.2主要的研究工作及内容安排 2 第二章 移动流媒体简介 4 2.1流媒体技术概述 4 2.2移动流媒体系统相关标准 5 2.2.1实时传输协议RTP 5 2.2.2会话描述协议SDP 6 2.2.3实时流媒体协议RTSP 6 第三章 视频编解码技术综述 8 3.1视频编码基本原理 8 3.1.1编解码基本结构 8 3.1.2压缩编码基本方法 10 3.2 H.264/AVC标准的主要应用与特点 11 3.3 H.264/AVC标准的构成 12 3.3.1基本概念 12 3.3.2基本分级 13 第四章 系统框架设计及实现 14 4.1系统需求 14 4.2系统方案选择 15 4.3系统框架设计 16 4.3.1系统