求翻译：08年之前，中国几乎所有城市都没有16：9的高清晰度电视节目信号，但是从北京奥组委承诺2008北京奥运会28个比赛项目的电视转播将全部采用高清信号进行转播开始，“高清奥运”口号开始叫响，中国的家用投影屏幕市场也由此正式走向16：9的显示方向，并且有望为主流显示。是什么意思？

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Before 08 years, Chinese nearly all cities do not have 16:9 high-definition television program signal, but from the Beijing Olympic Organizing Committee pledged 2008 Beijing Olympic Games 28 event television relay completely will use the high clear signal to carry on the retransmission start, “high

Prior to 08, almost all cities have HDTV signal without 16:9, but from the Beijing Olympic Organizing Committee promised 28 game projects for 2008 Beijing Olympic Games television will be broadcasting all HD signals starting, "HD Olympic Games" slogans began to be known all over the, China's domesti

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