一种嵌入式SWF解码器的设计与实现

发布时间：2018-03-20 23:02

本文选题：SWF　切入点：DVB标准　出处：《武汉科技大学》2008年硕士论文　论文类型：学位论文

【摘要】： 近几年,消费类电子产品发展成为世界潮流,市场迅速扩大。作为消费类电子产品核心的嵌入式多媒体平台获得了巨大的发展空间,如Web可视电话、机顶盒、PDA、多媒体手机、导航设备等。各消费电子厂商纷纷以产品能支持丰富多彩的音视频播放,以及动漫和游戏作为卖点和产品发展方向。与此同时,嵌入式多媒体平台接入Internet也已经实现。 SWF是互联网上流行的多媒体矢量交互格式,通常也称为Flash。基于SWF技术的网页实现了丰富多彩的交互应用,界面美观大方。现在SWF技术开放成熟,可用资源相当丰富,很适宜集成到嵌入式多媒体平台上,实现用户界面和操作方式的巨大进化,丰富娱乐节目。在详细介绍SWF技术的基础上,本文详细介绍了SWF解码器的系统架构和各个核心模块,分析了利用矩阵运算无失真地改变画面大小的算法和帧间复用算法,使解码器达到了预定的播放性能的目标,该解码器已在机顶盒LSI和ST平台实际运行,取得了令人满意的效果。整个系统的开发基于国内目前普遍使用的国际标准,设计了与系统独立的图形函数库,规范了解码器与系统的接口。由于可移植性强,独立于任何嵌入式操作系统的特点,使该解码器成为一个独立通用的SWF解码系统。最后本文分析了SWF在数字电视机顶盒上的应用。
[Abstract]:In recent years, consumer electronic products have become the trend of the world and the market has expanded rapidly. As the core of consumer electronic products, embedded multimedia platform has got a huge development space, such as Web videophone, set-top box PDAs, multimedia mobile phones. Various consumer electronics manufacturers have to support a variety of audio and video play, as well as animation and games as the selling point and product development direction. At the same time, embedded multimedia platform access to Internet has also been realized. SWF is a popular multimedia vector interactive format on the Internet, also known as Flash. Web pages based on SWF technology have realized rich and colorful interactive applications, and the interface is beautiful and generous. Now SWF technology is open and mature, and the available resources are quite rich. It is suitable to integrate into embedded multimedia platform to realize the huge evolution of user interface and operation mode and enrich entertainment programs. Based on the detailed introduction of SWF technology, this paper introduces the system architecture and each core module of SWF decoder in detail, and analyzes the algorithm of changing picture size without distortion by matrix operation and the algorithm of inter-frame multiplexing. The decoder has achieved the target of predetermined playback performance. The decoder has been running in the set-top box LSI and St platform and achieved satisfactory results. The development of the whole system is based on the international standard which is widely used in our country at present. The graphic function library which is independent of the system is designed, and the interface between the decoder and the system is standardized. Because of its portability, it is independent of any embedded operating system. It makes the decoder an independent and universal SWF decoding system. Finally, this paper analyzes the application of SWF in digital TV set-top box.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2008
【分类号】：TP311.52

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