当前,经济全球化的发展趋势和科学技术的迅猛发展,使综合国力竞争的前沿已推移到创新领域,社会经济的发展已经主要依赖于科学技术的进步。科技的创新和进步不但提高了生产力和降低了生产成本,而且大大增加了信息的辐射量。 广播电视是科技发明的直接产物,广播从声音发展为图像、电视从黑白到彩色、声音广 At present, the trend of economic globalization and the rapid development of science and technology have pushed the frontier of competition in overall national strength to the field of innovation. The development of the society and economy has largely relied on the progress of science and technology. Innovation and progress in science and technology not only improve productivity and reduce production costs, but also greatly increase the amount of information radiation. Radio and television are the direct result of invention of science and technology. Broadcasting evolves from sound to image. Television is from black and white to color with wide sound