电视播控系统音频调整分析  

The Analysis of Volumn Adjustment in TV Broadcasting System

作　　者：金浩[1] 

机构地区：[1]舟山广播电视总台,浙江舟山316000

出　　处：《中国有线电视》2013年第7期814-818,共5页China Digital Cable TV

摘　　要：记录了对舟山广播电视总台3套频道音频信道通路的检查、测试与调整的过程。此次调整工程使用了-20dBFS的标准信号,并针对几种不同信号源的信道通路环节以及共用的后端响度处理与编码设备,进行了细致的测试并得到了可靠的结论。根据发现的问题,结合不同信道的特点,提出了切实可行且有效的解决方案。其中具体分析了对播出素材的结构组成,得出了对原有素材进行快速提升的几种可选择的方法,并结合播出音频标准选择了以有效平均峰值为依据的提升算法。经过一段时间的检验,证明此次调整工程取得了显著的效果。This paper records the process of check and analysis of volumn ajustment in broadcasting system in ZSTV.In this project several different channels sorted by source were checked with-20dBFS 1000Hz sinusoidal signal inputs and reliable conclusions were conducted from which some solutions dedicated have been implemented.The material structure in storage and PCM encoding standard is analyzed to obtain the algorithm for the average max volumn of wav file.Obvious effect has been made after the adjustment project.

关 键 词：响度 编码 信号 PCM 采样率 量化比特数 

分 类 号：TN912.3[电子电信—通信与信息系统]