amplitude modulation(am) meaning in English

幅度调制；调幅

Digital sound broadcasting is a general term covering a wide range of systems and technologies , including eureka 147 and isdb - t , which are designed to replace frequency modulation ( fm ) broadcasting , digital radio mondiale ( drm ) , a possible successor to amplitude modulation ( am ) , as well as iboc , which is intended to complement the existing am and fm services
数码声音广播?是一个统称，技术上是分为不同的系统和制式，有取代fm广播的eureka147和isdb - t ，也有针对am广播的drm ，和可以与amfm并存的iboc等系统，它们都有一个共通点，是现时的收音机并不适用。