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Multimedia Transmission System on FDDI

FDDI上的多媒体传输系统

基本信息

批准号：
04555074
负责人：
SEZAKI Kaoru
金额：
$ 5.89万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

项目摘要

Recently, various types of very high-speed Local Area Networks have been proposed. Among them, FDDI (Fiber Distributed Data Interface) is the most promising one. At present, it is mainly used as back-bone LAN of Data Terminals. It has, however, the potential to be used as Multimedia LAN since its speed is enough affording the multimedia communication. From this point of view, we newly developed flow control algorithm to control the flow of multimedia signals, especially moving images and voices. We also studied the image coding technique matched with the above flow control.First, we studied the constant rate moving image transimission using the asynchronous class of FDDI.We examined the relationship between the traffic and the threshold valuewhich defines the priority level of transmission. Then, we fined the network configuration, namely the number of stations, which can handle such a real time communication.We also discussed the variable bit rate image transmission using the asynchrouns class. As a result we proposed a new algorithm in which the transmission of high priority image signals, which generally correspond to the low frequency signals, is guranteed even if the total traffic is very high.For the image coding, we studid the sub-band coding, since it suits the priority control very well. For exmaple, we proposed various types of very short type filters. We also composed M channel filter banks in which M is not a power of two.

最近，已经提出了各种类型的超高速局域网。其中，FDDI（光纤分布式数据接口）是最有前途的一种。目前，它主要用作数据终端的骨干局域网。然而，它有潜力被用作多媒体局域网，因为它的速度足以提供多媒体通信。从这个角度来看，我们新开发的流量控制算法来控制多媒体信号，特别是运动图像和语音的流量。本文还研究了与上述流量控制相匹配的图像编码技术。首先，我们研究了使用FDDI异步类的恒速率运动图像传输，分析了流量与定义传输优先级的阈值之间的关系。然后，我们确定了网络的结构，即可以处理这种真实的时间通信的站点数，并讨论了利用类的可变比特率图像传输。因此，我们提出了一种新的算法，该算法可以保证高优先级图像信号的传输，而这些信号通常对应于低频信号，即使总的业务量很大。对于图像编码，我们研究了子带编码，因为它非常适合优先级控制。例如，我们提出了各种类型的甚短型滤波器。我们还组成了M个通道滤波器组，其中M不是2的幂。