数据库多媒体数据对象的处理

在MIS中处理多媒体数据对象一般要解决两个问题 :一是如何将长度没有界限的多媒体数据对象写入数据库 ,二是在数据库中如何对多媒体数据对象进行操作。如果只是将声音、图形、图像等多媒体数据连接、嵌入到数据库中 ,不能对其进行查询、修改、运算等操作。然而 ,大多数开发工具并不支持多媒体信息向数据库的输入。因此 ,研究一种简单、实用的解决方案 ,为多媒体数据库的实现提供一种简捷的方法 ,具有实际意义。使用PowerBuilder 6.5,在解决多媒体数据输入数据库问题的基础上 ,实现了图像、声音、视频等多媒体信息的查询、修改、播放等操作 ,并给出了具体实现代码。

Processing Multimedia Objects With DBMS

Processing multimedia objects with data base management systems (DBMS) must solve two problems: one is how to input quite long multimedia data into data bases; the other is how to manipulate multimedia objects to data bases, it is generally impossible to conduct such operations as retrieval, revision and calculation on multimedia objects with the way to operate the general objects. Most data base developing tools do not support inputting multimedia objects to data bases. Hence, it is meaningful to develop a simple and practical solution to process multimedia objects in data bases. In this paper, with the use of Power Builder 6.5, we present a method to retrieve, revise and play common multimedia objects such as image, voice, and video. Some key implementation codes are given in detail.