With the improvement of the technology, especially in the fields such as computer technology , data coding and compress , digital modulation and VLSI. , the world electronic information industry enter into the digital era.

• 随着科学技术的进步，特别是计算机技术、数据编码与压缩技术、数字调制技术和超大规模集成电路技术的发展，全球迎来了电子信息产业数字化的新时代。