公开(公告)号：US20050281418A1

公开(公告)日：2005-12-22

申请号：US10871551

申请日：2004-06-21

申请人： Meir Shashoua

发明人： Meir Shashoua

IPC分类号： H03G3/00 ,  H03G7/00 ,  H04B1/00

CPC分类号： H03G9/005 ,  H03G7/002

摘要： A method for processing audio signal that includes receiving a plurality of digital audio signals and calculating signal levels of them. The next step is calculating smooth attenuation signal for each one of the input audio signals. The smooth attenuation signals are calculated according to the signal levels and smoothing criteria, such that the mixing of signals that include the input audio signals multiplied by their respective smooth attenuation signals is peak limited by a given threshold level.

摘要翻译： 一种用于处理音频信号的方法，包括接收多个数字音频信号并计算它们的信号电平。 下一步是计算每个输入音频信号的平滑衰减信号。 根据信号电平和平滑标准计算平滑衰减信号，使得包括输入音频信号乘以它们各自的平滑衰减信号的信号的混合受限于给定阈值电平。

公开(公告)号：US06535846B1

公开(公告)日：2003-03-18

申请号：US09634885

申请日：2000-08-07

申请人： Meir Shashoua

发明人： Meir Shashoua

IPC分类号： G10L1100

CPC分类号： H03G7/002

摘要： A voice signal processing system with multiple parallel control paths, each of which address different problems, such as the high peak-to-RMS signal ratios characteristic of speech, wide variations in RMS speech levels, and high background noise levels. Different families of input-output control curves are used simultaneously to achieve efficient peak limiting and dynamic range compression as well as low-level dynamic expansion to prevent excessive amplification of background noise. In addition, a delay in the audio path relative to the control path makes it possible to employ an effective look-ahead in the control path, with FIR filtering smoothing-matched to the look-ahead. Digital domain peak interpolators are used for estimating the peaks of the input signal in the continuous time domain.

摘要翻译： 具有多个并行控制路径的语音信号处理系统，每个路径分别解决不同的问题，例如语音的高峰值到均方根信号比特性，RMS语音电平的宽泛变化以及高背景噪声电平。 输入输出控制曲线的不同系列同时用于实现有效的峰值限制和动态范围压缩以及低级动态扩展，以防止背景噪声的过度放大。 此外，相对于控制路径的音频路径的延迟使得可以在控制路径中采用与先行平滑匹配的FIR滤波的有效预览。 数字域峰值内插器用于估计连续时域中输入信号的峰值。