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Effective Methods for Sending and Receiving Broadcast Data in Digital Broadcast Environments

在数字广播环境中发送和接收广播数据的有效方法

基本信息

批准号：
12480095
负责人：
TSUKAMOTO Masahiko
金额：
$ 3.97万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12480095/
关键词：
Digital Broadcast Push-Based Delivery Data Correlation Scheduling Strategy Caching Strategy Broadcast Filtering

项目摘要

In this research project, we have made several studies on fundamental technologies for sending and receiving broadcast data efficiently in the digital broadcast environments. The main achievements in our studies are as follows :First, we have focused our studies in the scheduling and the caching strategies of correlated broadcast data items in the push-based information systems. In a real world broadcast environment, clients often requests for correlated data items collectively. Thus, we have proposed several scheduling strategies to compose a broadcast program considering the subsequent requests. The proposed caching strategy replaces the cached data items at each client based on the degree of correlation and the remaining time for the subsequent broadcast item.Second, we have achieved a methodology to extract the intended data efficiently from a large volume of broadcast data. The methodology includes a mathematical foundation for filtering intended data from the receiving broadcast … More data. In the methodology, we have made careful consideration for the functional properties in filtering and the relationships among the filtering functions. The methodology also includes a mechanism to insert and delete a received data item based on the pre-defined ECA rules in the active database systems.Third focusing on the applications in which a server broadcasts continuous media data such as video and sound, we have proposed an effective scheduling method of a broadcast program. This method ensures the continuous replay of the broadcast data at each client, and also shortens the waiting time.Our ultimate goal was to integrate all of the above findings in a real system and to evaluate them on a practical platform. We regretfully could not achieve this aim due to time limitation. However, each of the above findings has received high appraisals in several international journals and conferences. We believe that these achievements are contributing to the advancement of fundamental technologies in the digital broadcast environments. Less

在本研究项目中，我们对在数字广播环境中高效发送和接收广播数据的基本技术进行了一些研究。本文的主要研究成果如下：首先，重点研究了基于推送的信息系统中相关广播数据项的调度和缓存策略。在现实世界的广播环境中，客户端经常集体请求相关的数据项。因此，考虑到后续的请求，我们提出了几种编排广播节目的调度策略。该缓存策略根据关联程度和后续广播项的剩余时间替换每个客户端缓存的数据项，从而实现了从海量广播数据中高效地提取预期数据的方法。该方法包括用于从接收广播…过滤预期数据的数学基础更多数据。在该方法中，我们仔细考虑了滤波中的函数性质和滤波函数之间的关系。该方法还包括在主动数据库系统中根据预定义的ECA规则对接收到的数据项进行插入和删除的机制。再次，针对服务器播放视频和声音等连续媒体数据的应用，提出了一种有效的广播节目调度方法。该方法保证了广播数据在每个客户端的连续回放，缩短了等待时间，最终目标是将上述结果集成到一个真实的系统中，并在一个实用的平台上对其进行评估。遗憾的是，由于时间限制，我们未能实现这一目标。然而，上述每一项发现都在几个国际期刊和会议上得到了高度评价。我们认为，这些成就正在推动数字广播环境中基本技术的进步。较少