单向的地面数字电视广播， 由于缺乏回传机制，只能给用户提 供高质量的影音节目，满足基本的 互动需求，限制了新业务的推广和 新商业模式的采用。欧洲...

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单向的地面数字电视广播， 由于缺乏回传机制，只能给用户提 供高质量的影音节目，满足基本的 互动需求，限制了新业务的推广和 新商业模式的采用。欧洲的DVB组 织在原有的DVB-T架构下，制订了 新的地面数字电视广播回传标准 DVB-RCT (Return Channel Terrestrial) 来支持互动服务。本文阐述了该标 准的关键技术及应用。-A one-way terrestrial digital television broadcasting, due to the lack of return mechanism, can only give users high-quality audio-visual programs to meet their basic needs of the interaction, limiting the promotion of new business and new business models adoption. The European DVB organization in the original DVB-T framework, the development of new terrestrial digital TV broadcasting standard return DVB-RCT (Return Channel Terrestrial) to support interactive services. In this paper the standard key technology and applications.