分前端本地及VOD节目插播技术研究

Analysis ofinserting and broadcasting technology of local and VOD programs in front end

通过分前端两种插播方式的介绍和比较,提出小型前端插播方案建议;以直调光发(凌云天博MOT2300)为例,讨论具体调试方法及注意事项,对插播设备调试过程中常遇到的问题提供解决方案,确保主路及插播信号均获得优良指标。本文重点讨论光插调试,对分前端本地节目编码复用调制等信号处理部分不做论述。

Through the introduction and comparison of the two front-end insertion methods,the proposal of a small front-end insertion scheme is proposed;the direct adjustment optical transmitter(Lingyun Tianbo MOT2300)is taken as an example to discuss the specific debugging methods and precautions.To provide solutions to ensure that the main circuit and the interleaved signal have good indicators.This article focuses on optical plug-in debugging,and does not discuss signal processing parts such as local front-end local program coding,multiplexing and modulation.