我国代码方式图文电视广播差错控制码的开发

DEVELOPMENT OF AN ERROR-CONTROL CODE FOR CODED TRANSMISSION TELETEXT

提出了一种适合我国电视制式的代码方式图文电视广播差错控制码方案——RS码方案。该码具有较强的纠错能力和较高的编码效率。讨论提出的最佳RS码频域编码缩短方法可以使得接收端在一场电视信号周期内完成实时软件译码。文末给出了采用该码的图文电视广播系统进行的室内开路实验实际接收效果。

In this paper, an error-control scheme—RS Code scheme, suitable for coded transmission teletext of China, is presented. In addition, an efficient frequecy domain shorten method for RS Codes is proposed. The result shows that, this code can be perfectly decoded by microprocessor-Z80A in one TV singnal field period (1/50S). At last, indoor experiment for the scheme is performed, and a good result is gained.