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本文从数字电视传输标准选择、工作频率选择、传输方案拓扑结构等方面详细介绍了昭通十一县区有线、无线数字电视节目全覆盖技术。既把全市有线电视HFC网络视为一个网络,只需搭建一个有线数字电视前端和无线数字广播电视前端,即可实现全市的有线、无线、调频广播同频率覆盖,县级广播电视局所开办的电视节目和广播节目采用相同的编码调制方式混合即可,从而实现节目全覆盖。
This paper introduces the full coverage of wired and wireless digital TV programs in Zhaotong eleven counties in terms of digital television transmission standard selection, working frequency selection and transmission scheme topology. Only the city’s cable HFC network as a network, just build a digital cable TV front-end and wireless digital radio front-end, you can achieve the city’s wired, wireless, FM radio coverage with the same frequency, the county radio and television stations run the TV Programs and radio programs using the same modulation and coding methods can be mixed in order to achieve full program coverage.