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本文针对图形制VIDEOTEX系统,传送一页画面所需时间太长的缺点,提出了一种简单易行的汉字图形数据压缩方法,已在现有的VIDEOTEX实验系统上调试成功。汉字图形数据的压缩量为30％,一页画面的字符图形数据压缩量理论上可达56％。对由此产生的误码敏感问题也采取了一些适当的措施加以解决。在图象中心Z80微机上建立了VIDEOTEX固定画面和滚动画面的编辑系统,实现了三相闪烁、逐行滚动、隐匿显示、逐字横写、逐字竖写等各种图象表现手段,特别是增加了用户终端回送信息的通信功能,使现有VIDEOTEX实验系统向实用化推进了一步。
This paper presents a simple and easy method of compressing Chinese character graphic data, which has been successfully debugged on the existing VIDEOTEX experiment system. The amount of compression of Chinese graphic data is 30%, and the amount of compression of character graphic data on a single page is theoretically 56%. The resulting error-sensitive issues also took some appropriate measures to be resolved. VIDEOTEX fixed screen and scroll screen editing system have been set up in the center of Z80 of the image center to realize various image display means such as three-phase flashing, line-by-line rolling, hiding display, word-by- Is to increase the user terminal to send back information communication capabilities, the existing VIDEOTEX experimental system to practical one step forward.