公开(公告)号：US07826523B2

公开(公告)日：2010-11-02

申请号：US11395412

申请日：2006-03-31

申请人： Ahmed Said ,  Elias J. Nemer ,  Gregory R. Goslin

发明人： Ahmed Said ,  Elias J. Nemer ,  Gregory R. Goslin

IPC分类号： H03H7/30 ,  H04L27/06 ,  H04B1/10

CPC分类号： H04L25/0307 ,  H03H2021/0056 ,  H04L2025/03356 ,  H04L2025/03566 ,  H04L2025/03694

摘要： A noise level of an input signal is determined by a noise calculation module. based on the noise level, a boundary setting module sets a reduced constellation boundary interval. This reduced constellation boundary interval is employed by an equalizer to perform adaptive equalization of the input signal.

摘要翻译： 输入信号的噪声电平由噪声计算模块确定。 基于噪声水平，边界设置模块设置缩小的星座边界间隔。 均衡器采用这种减小的星座边界间隔来执行输入信号的自适应均衡。

公开(公告)号：US07369990B2

公开(公告)日：2008-05-06

申请号：US11447365

申请日：2006-06-05

申请人： Elias J. Nemer

发明人： Elias J. Nemer

IPC分类号： G10L21/02

CPC分类号： G10L21/0208

摘要： Acoustic noise for wireless or landline telephony is reduced through optimal filtering in which each frequency band of every time frame is filtered as a function of the estimated signal-to-noise ratio and the estimated total noise energy for the frame. Non-speech bands, non-speech frames and other special frames are further attenuated by one or more predetermined multiplier values. Noise in a transmitted signal formed of frames each formed of frequency bands is reduced. A respective total signal energy and a respective current estimate of the noise energy for at least one of the frequency bands is determined. A respective local signal-to-noise ratio for at least one of the frequency bands is determined as a function of the respective signal energy and the respective current estimate of the noise energy. A respective smoothed signal-to-noise ratio is determined from the respective local signal-to-noise ratio and another respective signal-to-noise ratio estimated for a previous frame. A respective filter gain value is calculated for the frequency band from the respective smoothed signal-to-noise ratio. Also, it is determined whether at least a respective one as a plurality of frames is a non-speech frame. When the frame is a non-speech frame, a noise energy level of at least one of the frequency bands of the frame is estimated. The band is filtered as a function of the estimated noise energy level.

摘要翻译： 用于无线或座机电话的声学噪声通过最佳滤波而减少，其中每个时间帧的每个频带根据估计的信噪比和帧的估计总噪声能量被滤波。 非语音频带，非语音帧和其他特殊帧被一个或多个预定乘数值进一步衰减。 由每个由频带形成的帧形成的发送信号中的噪声减小。 确定对于至少一个频带的相应的总信号能量和相应的噪声能量的估计。 根据相应的信号能量和噪声能量的相应电流估计，确定用于至少一个频带的相应的本地信噪比。 根据相应的本地信噪比和针对前一帧估计的另一个相应的信噪比确定相应的平滑信噪比。 从各个平滑的信噪比对频带计算出相应的滤波器增益值。 此外，确定至少是作为多个帧的相应的一个是非语音帧。 当帧是非语音帧时，估计帧的至少一个频带的噪声能级。 该频带作为估计的噪声能级的函数进行滤波。

公开(公告)号：US07333558B2

公开(公告)日：2008-02-19

申请号：US10403576

申请日：2003-03-31

申请人： Elias J. Nemer ,  Vladimir Kravtsov

发明人： Elias J. Nemer ,  Vladimir Kravtsov

IPC分类号： H04L27/04

CPC分类号： H04L25/03343 ,  H04L25/03878 ,  H04L2025/03477 ,  H04L2025/03522

摘要： In one embodiment, the present invention includes an transmitter apparatus having a digital filter to compensate in a baseband frequency for magnitude and delay slopes occurring in the transmitter's analog path.

摘要翻译： 在一个实施例中，本发明包括具有数字滤波器的发射机设备，用于在发射机的模拟路径中出现的幅度和延迟斜率的基带频率中进行补偿。

公开(公告)号：US07058572B1

公开(公告)日：2006-06-06

申请号：US09493709

申请日：2000-01-28

申请人： Elias J. Nemer

发明人： Elias J. Nemer

IPC分类号： G10L21/02

CPC分类号： G10L21/0208

摘要： Acoustic noise for wireless or landline telephony is reduced through optimal filtering in which each frequency band of every time frame is filtered as a function of the estimated signal-to-noise ratio and the estimated total noise energy for the frame. Non-speech bands and other special frames are further attenuated by one or more predetermined multiplier values. Noise in a transmitted signal formed of frames each formed of frequency bands is reduced. A respective total signal energy and a respective current estimate of the noise energy for at least one of the frequency bands is determined. A respective local signal-to-noise ratio for at least one of the frequency bands is determined as a function of the respective signal energy and the respective current estimate of the noise energy. A respective smoothed signal-to-noise ratio is determined from the respective local signal-to-noise ratio and another respective signal-to-noise ratio estimated for a previous frame. A respective filter gain value is calculated for the frequency band from the respective smoothed signal-to-noise ratio. Also, it is determined whether at least a respective one as a plurality of frames is a non-speech frame. When the frame is a non-speech frame, a noise energy level of at least one of the frequency bands of the frame is estimated. The band is filtered as a function of the estimated noise energy level.

摘要翻译： 用于无线或座机电话的声学噪声通过最佳滤波而减少，其中每个时间帧的每个频带根据估计的信噪比和帧的估计总噪声能量被滤波。 非语音频带和其他特殊帧由一个或多个预定乘数值进一步衰减。 由每个由频带形成的帧形成的发送信号中的噪声减小。 确定对于至少一个频带的相应的总信号能量和相应的噪声能量的估计。 根据相应的信号能量和噪声能量的相应电流估计，确定用于至少一个频带的相应的本地信噪比。 根据相应的本地信噪比和针对前一帧估计的另一个相应的信噪比确定相应的平滑信噪比。 从各个平滑的信噪比对频带计算出相应的滤波器增益值。 此外，确定至少是作为多个帧的相应的一个是非语音帧。 当帧是非语音帧时，估计帧的至少一个频带的噪声能级。 该频带作为估计的噪声能级的函数进行滤波。