公开(公告)号：US07283956B2

公开(公告)日：2007-10-16

申请号：US10245963

申请日：2002-09-18

申请人： James Patrick Ashley ,  Tenkasi Vaideeswaran Ramabadran ,  Michael Joseph McLaughlin

发明人： James Patrick Ashley ,  Tenkasi Vaideeswaran Ramabadran ,  Michael Joseph McLaughlin

IPC分类号： G10L21/00 ,  G10L21/02

CPC分类号： H04B1/1027

摘要： A method and apparatus for noise suppression is described herein. The channel gain is controlled based on a degree of variability of the background noise. The noise variability estimate is used in conjunction with a variable attenuation concept to produce a family of gain curves that are adaptively suited for a variety of combinations of long-term peak SNR and noise variability. More specifically, a measure of the variability of the background noise is used to provide an optimized threshold that reduces the occurrence of non-stationary background noise entering into the transition region of the gain curve.

摘要翻译： 本文描述了用于噪声抑制的方法和装置。 基于背景噪声的变化程度控制信道增益。 噪声可变性估计与可变衰减概念一起使用，以产生适应于长期峰值SNR和噪声变异性的各种组合的增益曲线族。 更具体地，使用背景噪声的可变性的度量来提供优化的阈值，其减少进入增益曲线的过渡区域的非平稳背景噪声的发生。