中央及地方广播电视节目无线数字化覆盖工程单频网信源改造方案的设计与应用  

Design and Application of Single Frequency Network Source Transformation Scheme in the Wireless Digital Coverage Project of Central and Local Radio and Television Programs

作　　者：覃晓志 庞美军 韦杰萍 Qin Xiaozhi;Pang Meijun;Wei Jieping(Guangxi Press and Publication Technical School,Guangxi 530000,China;Guangxi Radio and Television Technology Center,Guangxi 530000,China)

机构地区：[1]广西新闻出版技工学校,广西530000 [2]广西广播电视技术中心,广西530000

出　　处：《广播与电视技术》2024年第10期94-101,共8页Radio & TV Broadcast Engineering

摘　　要：本文针对700兆赫频率迁移完成后单频网组网中“同频同源同时间”的技术难点以及组网后台站数字电视仅依赖卫星信号单信源播出的安全隐患,提出了信源改造的解决方案。通过对现有数字信源前端系统的拓扑结构和传输过程进行分析,为省(区)、市、县、台站各级信源系统分别设计了改造方案。在保持台站原有设备连接不变的情况下,通过更改设备配置实现单频网的改造。同时,通过增加备用信源,解决了单一卫星信号源播出存在的安全隐患。This article proposes a solution for source transformation to address the technical difficulties of“same frequency,same source,and same time”in single frequency network after the completion of 700 MHz frequency migration,as well as the security risks of relying solely on satellite signals for single source broadcasting in the network backend station digital TV.Through the analysis of the topology structure and transmission process of the front-end system of the digital source at the present stage,the transformation schemes of the provincial(district),city,county,and station are designed respectively.Under the condition that the topology of the original equipment is unchanged,the single-frequency network transformation of the signal source is realized by changing the equipment configuration.At the same time,by adding standby information sources,the hidden dangers of single information source broadcast of satellite signals are solved.

关 键 词：单频网 信源改造 地面数字电视 

分 类 号：TN948.1[电子电信—信号与信息处理]