摘要
在数字音频技术中，过取样可以降低量化噪声，但却带来一种新的噪声，即空闲信道噪声。本文叙述空闲信道噪声的产生过程，以及采用加上抖晃信号以消除空闲信道噪声的方法。
In digital audio technology, oversampling can reduce quantizing noise,but a new noise,idle noise is produced during the oversampling process,andit can be eliminated by adding a dither signal into the processed signal.This dither used in the digital AM fransmiffer is also described as an application example.
出处
《广播与电视技术》
北大核心
1995年第10期6-10,共5页
Radio & TV Broadcast Engineering
关键词
过取样
空闲信道噪声
抖晃信号
Oversampling
idle channel noise
dither signal
