摘要
本文通过从彩铃播放原理出发,阐述了通过分析传统GSM规范中VAD算法的原理和条件,推导出该原始算法必然对彩铃音质产生影响的结论。同时在此基础上,对GSM规范提出了创新性的改进方案(智能VAD算法和智能DTX算法),使VAD算法既能正常应用,又不会影响彩铃音质,彻底解决了多年来GSM网络中无法避免的问题。
This article starts with color ring back tone, elaborating how to derive the conclusion that the original VAD algorithm must affect the CRBT sound quality by analyzing the theory and terms of this algorithm of the traditional GSM standard. Meanwhile, on the basis of it, proposing the innovative improvement for the GSM standard（intelligent algorithms） by which VAD algorithm can be used normally but not affect CRBT sound quality so that absolutely resolves the inevitable problems for the past years on the GSM network.
出处
《电信工程技术与标准化》
2010年第6期41-44,共4页
Telecom Engineering Technics and Standardization
