今年上半年,青岛海信集团向社会推出了我国第一代图文电视,在市场上引起了强烈的反响。那么图文电视究竟是什么东西,会使人们产生如此浓厚的兴趣呢? 图文电视实际上是普通电视机与图文解码器的二合一机。普通电视图像是按照每秒50场的速率一场一场地传递,两场之间有一段不传送图像信息的空隙,称为“场消隐期”,图文信息就是经过数字化编码处理后插入到场消隐期中的。一页图文电视广播画 In the first half of this year, Qingdao Hisense Group launched the first-generation Teletext in China to the community, arousing strong repercussions in the market. So what exactly is Teletext, will make people have such a strong interest in it? Teletext is actually a common television and graphics decoder combo. Normal TV images are delivered on a field-by-field basis at a rate of 50 fields per second. There is a gap between the two fields that does not transmit image information, called a “field-blanking period.” The teletext information is digitally encoded and inserted into the field Blanking period One page of teletext picture