广播影视面临着自诞生以来最大的一次技术变革。 回顾广播影视技术的发展史,广播从调幅到调频、立体声,电视从黑白到彩色,电影从无声到有声、从黑白到彩色,传输从无线到有线、卫星,每一次技术进步无疑都使广播影视得到了很大发展,但这些都是基于模拟技术,主要是量的变化和外延的扩张。 Radio and Television is facing the biggest technological change since it was born. Recalling the history of the development of radio and television technology, radio from AM to FM, stereo, television from black and white to color, the movie from no sound to sound, from black and white to color, transmission from wireless to cable, satellite, every technical progress undoubtedly make radio and television Have been greatly developed, but these are based on analog technology, mainly the amount of change and extension of the expansion.