【作者】 万明磊；

【导师】 刘卫忠；

【作者基本信息】 华中科技大学 ， 微电子学与固体电子学， 2005， 硕士

【摘要】 现阶段,数字电视正在全球范围内迅速发展,关于数字电视技术的各种研究正在全面开展。数字电视系统丰富了节目的内容,提高了画面的清晰度,多元化的数据广播服务也逐渐发展起来。适应数字电视的需要,数字电视终端产品——机顶盒也向着综合多媒体应用平台的方向发展。人们对信息的需求不再满足于被动的看电视,而对宽带交互式业务有了更高的要求。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,很适宜移植到数字电视领域,实现机顶盒用户界面和操作方式的巨大进化,促进数字电视交互式业务的开发。为此,本文设计实现了实用的数字机顶盒SWF解码器,分析解决了解码器开发中的重点和难点。整个系统的开发采用标准ANSI-C语言,基于国内目前普遍使用的国际标准,不涉及到特定的机顶盒硬件或操作系统,是一个独立通用的解码系统。本文同时还设计了符合DVB标准的SWF数据压缩传输,与SWF解码器配合,可以实现数字电视机顶盒上的各种SWF交互应用。从技术要点和应用前景上,本文详细分析了SWF在嵌入式浏览器Flash插件、定制机顶盒GUI以及交互电视中间件中的作用,给出了具体的技术细节和实现方案。SWF技术在数字电视领域具有很大应用潜力,结合数字电视标准、收费模式进行进一步的开发是它将来的研究方向。更多还原

【Abstract】 At the present stage, the Digital TV is being developed rapidly in the global range. Various kinds of research about the technology of the DTV are being studied in an all-round way. The DTV has enriched the content of the program, has improved the definition of the picture. Rich and colorful data broadcasting serves are developed gradually too. Meet the need of the DTV, the terminal of DTV—Set Top Box is developed towards the direction of the multimedia application platform. People are no longer satisfied with passive watching TV for information, but have higher demands for the interactive serves of broadband. SWF is a popular interactive vector file format of multimedia on Internet, usually called Flash too. The webpage based on SWF technology has realized rich and colorful interactive application, and elegant in appearance. SWF technology is open and ripe now, available resources are quite abundant, very suitable for transplanting to the DTV field. SWF will realize the enormous evolution of user’s interface and operation mode of STB, promote the development of the interactive serves of the DTV. For the reason, the practical digital STB SWF decoder was designed and realized in this paper, focal point and difficult point of the decoder was analysed. The development of the whole system adopts standard ANSI-C language, based on the international standard to generally using at present. Decoder is an interchangeable independent decode system, not involving the specific STB hardware or operating system. SWF data compressed transport based on DVB standard was also designed in this paper. Cooperated with SWF decoder, they can realize the interactive application of various kinds of SWF on STB of the DTV. From technology point and applicable prospect, using of SWF in embedded browser Flash plug-in, STB’s GUI customizing and Interactive TV Middleware was analysed in this paper. There also provided the concrete technological detail and implement scheme. SWF technology has very great potentiality of using in the field of DTV. When carry on further development, its research direction in the future is to combine DTV standard and charge mode.更多还原