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1. 发明授权

US07908138B2 Low complexity noise reduction method 有权
标题翻译：低复杂度降噪方法
公开(公告)号：US07908138B2
公开(公告)日：2011-03-15
申请号：US11463377
申请日：2006-08-09
申请人： Gary Qu Jin , Dean Morgan
发明人： Gary Qu Jin , Dean Morgan
IPC分类号： G10L21/02
CPC分类号： G10L21/0208 , G10L2021/02168
摘要： To reduce noise in an input signal that may contain speech, first an estimate of the noise level in the signal is obtained. The level of the input signal is then compared with the noise level estimate signal to determine whether speech is dominant. Less aggressive noise reduction is applied to the input signal when speech is dominant than when only noise is present.
摘要翻译：为了减少可能包含语音的输入信号中的噪声，首先获得信号中的噪声电平的估计。然后将输入信号的电平与噪声电平估计信号进行比较，以确定语音是否占优势。当语音占优势时，输入信号的噪声降低不如仅存在噪声。

2. 发明授权

US07327793B2 DMT peak reduction without affecting transmission signal 失效
标题翻译： DMT峰值降低而不影响传输信号
公开(公告)号：US07327793B2
公开(公告)日：2008-02-05
申请号：US10085061
申请日：2002-03-01
申请人： Gary Qu Jin
发明人： Gary Qu Jin
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L27/2624
摘要： In a method of effecting peak reduction in a DMT signal, a predetermined signature waveform is first produced. This is then subtracted from the DMT signal in the region of a signal peak whenever the DMT signal is above a predetermined maximum level.
摘要翻译：在实现DMT信号中的峰值降低的方法中，首先产生预定的签名波形。每当DMT信号高于预定最大电平时，在信号峰值区域中，从DMT信号中减去该信号。

3. 发明申请

US20070262819A1 AUTOMATIC GAIN CONTROL FOR MOBILE MICROPHONE 有权
标题翻译：自动增益控制手机麦克风
公开(公告)号：US20070262819A1
公开(公告)日：2007-11-15
申请号：US11740332
申请日：2007-04-26
申请人： Gary Qu Jin , Yonghong Huang
发明人： Gary Qu Jin , Yonghong Huang
IPC分类号： H03G3/00
CPC分类号： H03G3/32 , G10L25/78 , H04M1/6008
摘要： An automatic gain control unit controls the gain applied to an input signal produced by a microphone subject to ambient noise. The automatic gain control circuit continually monitors the signal level of said input signal. A first gain control circuit decreases the gain applied to the input signal in increments of a first size when the input signal exceeds a first predetermined level. A second gain control circuit increases the gain applied to said input signal in increments of a smaller size when the input signal falls below a second predetermined level and in response to the presence of a speech present signal. The second predetermined level is less than said first predetermined level. In one embodiment, the first gain control circuit controls the analog gain of a codec and the second gain control circuit controls the digital gain of the codec.
摘要翻译：自动增益控制单元控制由受到环境噪声的麦克风产生的输入信号的增益。自动增益控制电路连续监视所述输入信号的信号电平。当输入信号超过第一预定电平时，第一增益控制电路减小以第一大小为增量施加到输入信号的增益。第二增益控制电路当输入信号下降到低于第二预定电平并且响应于存在语音存在信号时，以较小尺寸的增量增加施加到所述输入信号的增益。第二预定水平小于所述第一预定水平。在一个实施例中，第一增益控制电路控制编解码器的模拟增益，第二增益控制电路控制编解码器的数字增益。

4. 发明授权

US06282286B1 Nonlinear processor for acoustic echo canceller with background noise preservation and long echo tail suppression 有权
标题翻译：用于声学回声消除器的非线性处理器，具有背景噪声保护和长回波尾部抑制
公开(公告)号：US06282286B1
公开(公告)日：2001-08-28
申请号：US09143973
申请日：1998-08-31
申请人： Gordon J. Reesor , Gary Qu Jin , Thomas Qian
发明人： Gordon J. Reesor , Gary Qu Jin , Thomas Qian
IPC分类号： H04B320
CPC分类号： H04B3/234
摘要： A nonlinear processor (NLP) for selectively removing or reducing residual echo signals from an acoustic echo canceller associated with a telephony terminal is provided. Low level background noise and near end speech signals pass through the NLP structure substantially unaltered. Distortion, background noise above a preset threshold and echo signals including long duration echoes are replaced with a linear combination of previous noise data.
摘要翻译：提供了用于从与电话终端相关联的声学回声消除器中选择性地去除或减少残余回波信号的非线性处理器（NLP）。低电平背景噪声和近端语音信号通过NLP结构基本上未改变。高于预设阈值的失真，背景噪声以及包括长持续时间回波的回波信号被先前噪声数据的线性组合替代。

5. 发明授权

US08135148B2 Automatic gain control for mobile microphone 有权
标题翻译：移动麦克风的自动增益控制
公开(公告)号：US08135148B2
公开(公告)日：2012-03-13
申请号：US11740332
申请日：2007-04-26
申请人： Gary Qu Jin , Yonghong Huang
发明人： Gary Qu Jin , Yonghong Huang
IPC分类号： H03G3/00
CPC分类号： H03G3/32 , G10L25/78 , H04M1/6008
摘要： An automatic gain control unit controls the gain applied to an input signal produced by a microphone subject to ambient noise. The automatic gain control circuit continually monitors the signal level of said input signal. A first gain control circuit decreases the gain applied to the input signal in increments of a first size when the input signal exceeds a first predetermined level. A second gain control circuit increases the gain applied to said input signal in increments of a smaller size when the input signal falls below a second predetermined level and in response to the presence of a speech present signal. The second predetermined level is less than said first predetermined level. In one embodiment, the first gain control circuit controls the analog gain of a codec and the second gain control circuit controls the digital gain of the codec.
摘要翻译：自动增益控制单元控制由受到环境噪声的麦克风产生的输入信号的增益。自动增益控制电路连续监视所述输入信号的信号电平。当输入信号超过第一预定电平时，第一增益控制电路减小以第一大小为增量施加到输入信号的增益。第二增益控制电路当输入信号下降到低于第二预定电平并且响应于存在语音存在信号时，以较小尺寸的增量增加施加到所述输入信号的增益。第二预定水平小于所述第一预定水平。在一个实施例中，第一增益控制电路控制编解码器的模拟增益，第二增益控制电路控制编解码器的数字增益。

6. 发明授权

US06999507B2 DMT bit allocation with imperfect TEQ 失效
标题翻译： DMT位分配不完全的TEQ
公开(公告)号：US06999507B2
公开(公告)日：2006-02-14
申请号：US09739979
申请日：2000-12-20
申请人： Gary Qu Jin
发明人： Gary Qu Jin
IPC分类号： H04B17/00
CPC分类号： H04L5/0046 , H04B3/46 , H04L5/0007 , H04L5/006 , H04L5/0062 , H04L25/03133 , H04L2025/03414 , H04L2025/03477
摘要： A method of determining cross channel interference in an Discrete Multitone (DMT) implementation of a Digital Subscriber Line (DSL) system. The cross channel interference is determined utilizing a residual impulse spectrum after implementation of a Time Equalization (TEQ) algorithm. In one application the cross channel interference value is used in a bit allocation algorithm to improve such that more bits are allocated to the channels with low interference and fewer bits are allocated to those channels having high interference. In this application the bit allocation algorithm is run twice, once before the interference measurement and once after.
摘要翻译：一种确定数字用户线（DSL）系统的离散多音（DMT）实现中的交叉信道干扰的方法。在实施时间均衡（TEQ）算法之后，利用残余脉冲频谱确定交叉信道干扰。在一个应用中，跨信道干扰值用于比特分配算法以改进，使得更多比特被分配给具有低干扰的信道，并且较少的比特被分配给具有高干扰的那些信道。在本应用中，位分配算法运行两次，一次在干扰测量之前和之后。

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