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On-Campus Data Streaming based on Broadcast Computing

基于广播计算的校园数据流

基本信息

批准号：
14580456
负责人：
OKADA Ken-ichi
金额：
$ 2.24万
依托单位：
Keio University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

Recently, in many fields, digitization of information is spreading in the world by the progress of the compression technology of digitized data and transmission technology. Digitization is progressing also in the broadcast industry and the mainstream of broadcast is shifting to digital broadcasting from analog broadcasting. On the other hand, because of the communication infrastructure for getting the digital information, such as the high-speed LAN environment of hundreds Mbps and the spread of PCs, the information environment in a university is put on place. Various information, such as an intramural event in a university homepage, is not only acquirable, but Web is used in case of getting enrolled. However in the broadcast in a university, it is only voice broadcast of an analog and the present condition is not used not much frequently from the reason for moreover becoming the disturbance of a class.In this paper, the information delivery platform supposing digital school public addr … More ess system of the next generation is proposed. In school public address system of this next generation, it assumes being aimed at various contents, such as not only on voice broadcast but also the message on the board. Moreover, since it is predicted that the contents of video form also increase with progress of the creation technology of not only an image but also a video in the form of contents, and a video is also targeted.A proposal with the following features is performed in such assumption environment.First, unicast which can secure communication and broadcast which can perform information distribution, without lowering communication quality because even if the number of data receiving persons increases, the cost of data distribution does not change so much, are used in data communication. Second, by the conventional broadcasting, although the place to broadcast is fixed, free broadcasting which all users can broadcast is realized in this proposal. Thirdly, flexible broadcast is realized by adding the attribute of the broadcast channel a broadcast, place for broadcast, broadcast importance, and the term of validity. Furthermore, it is necessary to consider the broadcasting which broadcasts different kinds of contents, such as an image and a video and there are not so much contents like TV broadcasting. Then finally, playing time of an image and a repetition broadcasting interval are set, and the broadcast schedule which is calculated by the broadcast importance and the term of validity which are the attribute of contents is proposed. Less

近年来，随着数字化数据压缩技术和传输技术的进步，信息的数字化在世界范围内得到了广泛的应用。数字化也在广播行业中取得进展，广播的主流正在从模拟广播转向数字广播。另一方面，由于获得数字信息的通信基础设施，如数百Mbps的高速LAN环境和PC的普及，大学中的信息环境已经到位。各种信息，如大学主页上的校内活动，不仅可以获取，而且在入学的情况下可以使用Web。然而在高校广播中，由于只是模拟的语音广播，使用不太频繁的现状，而且成为了课堂的干扰，本文提出了一种基于数字校园广播的信息发布平台，并对该平台的实现进行了详细的分析和研究，提出了一种基于数字校园广播的信息发布平台的实现方法，并对该平台的实现过程进行了详细的分析和研究。 ...更多信息提出了下一代ESS系统。在下一代的学校广播系统中，它假设针对各种内容，例如不仅在语音广播上，而且在板上的消息。另外，不仅是图像，而且随着内容形式的视频的制作技术的发展，预测视频形式的内容也会增加，因此也以视频为对象，在这样假设环境下，提出了具有以下特征的方案：首先，能够确保通信安全的单播和能够进行信息分发的广播，因为即使数据接收人数增加，数据分发的成本也不会改变太多，所以不会降低通信质量。第二，通过传统广播，虽然广播的地点是固定的，但在该方案中实现了所有用户都可以广播的自由广播。第三，通过增加广播频道的属性广播、广播地点、广播重要性和有效期，实现了灵活广播。此外，有必要考虑广播不同种类的内容（诸如图像和视频）的广播，并且没有像TV广播那样的那么多内容。然后，最后，设置图像的播放时间和重复广播间隔，并且提出通过作为内容的属性的广播重要性和有效期限计算的广播调度。少