广播由模拟向数字发展已经成为一种趋势,广播系统的数字化改造正在全世界范围内进行,广播数字化的技术也层出不穷。本文介绍了数字广播DAB、DRM和HDRADIO系统,并依次就其国内外发展动态、系统工作原理以及与传统广播相比各自改进的优点等方面进行比较分析。 The development of broadcasting from analog to digital has become a trend. The digital transformation of broadcasting system is being carried out all over the world. The broadcasting digitalization technology is also emerging. This article introduces the DAB, DRM and HDRADIO systems of digital broadcasting, and then compares and analyzes the development dynamics at home and abroad, the working principle of the system, and the advantages of their respective improvements compared with traditional broadcasting.