用系统指标占用系数分析法优选提高质量指标措施的方法

An Approach to Improve the System Quality Index by Optimizing the Index Occupation

为实现数字电视平移转换而对有线电视系统所做的更新或改造中,有些地方可能与接下来的双向传输改造不相适应,需要重复改造,造成不同程度的浪费。简单分析指标占用系数和指标劣化量的关系,并提出在数字电视平移前,可用系统指标占用系数分析法分析核算系统各个单元器件的质量指标,找出系统中指标劣化量超大的器件,优选出指标劣化量小的器件,在此基础上总结几条减少指标劣化量的措施,对系统进行局部调整,即可提高系统的质量指标,满足数字电视平移转换的需要。

The reconstruction of CATV system for transformation to digital system may be inconsistent with the transformation to bi-directional system, which leads to another round of consumptive reconstruction. With the help of index occupation analysis, the components and tuning which is most responsible for the deterioration of the system quality can be probed out, and the best components and tuning can be filtered out at the same time. Therefore, quality improvements with cheap minor local adjustment to meet the requirement for transformation to digital system are possible.