摘要
从可视图文表示层句法出发，根据特殊功能编码扩充原理，提出了通过增加Windows对象编码集G4，由调用序列调用G4来启动WindowsBase可视图文终端系统的设计方法，并论述了面向Windows结构对象的具体编码方法和相应的应用层协议。应用效果表明，此设计方案即能与目前国内承担商业运行的DosBase字符方式可视图文兼容又能适应国际未来多媒体可视图文的发展趋势。
From the angle of videotext presentation layer syntax and according to the principle of extended coding for special videotext functions, this article proposes a program for building a WindowsBase video platform which is composed of an extended code set-WINCS and the relevant WINCS protocols. This WindowsBase videotext design has been used in practical video terminal systems. Results show that such a design is both compatible with old DosBase systems and well adapted to the multimedia development in the future.
出处
《数字通信》
1999年第1期10-11,14,共3页
Digital Communications and Networks
关键词
可视图文
面向对象
重定义
WINDOWS
平台设计
videotext, object-oriented, redefinition, transferring array, graphics mode, interface between person andmachine
