中文摘要：

通过对当前国内外的数字移动多媒体广播主流标准的分析，结合数字地面电视国家标准GB20600—2006和移动多媒体广播行业标准CMMB，深入探讨信号同步、信道编码与调制、单频网等关键技术，并对数字多媒体广播的发展趋势进行预测。

英文摘要：

With analysis of international and domestic mainstream standards on digital multimedia broadcasting and recently released DMB-TH and CMMB standards, key techniques such as signal synchronization, channel coding ＆ modulation and single frequency network are discussed, and some predictions of its development are made based on our research.