20世纪末以来,数字技术、互联网技术及现代通信技术飞速发展,给广播影视等传媒带来巨大的影响,传媒和科技都呈几何级数发展速度变化与增长。年龄稍长的人,可能都经历了电视的视图从黑白到彩色,广电技术从模拟信号到数字信号,节目从单调到越来越丰富的过程。如今广播影视传播的数字化、网络化、互动化已经成 Since the end of the 20th century, the rapid development of digital technology, Internet technology and modern communication technology has brought enormous influence to radio, film, television and other media. Both the media and technology have experienced geometric changes and growth rates. Older people may have experienced the television view from black and white to color, radio and television technology from analog signals to digital signals, programs from monotonous to more and more rich process. Nowadays, the digitalization, network and interaction of radio, film and television have become a reality