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1. 发明授权

US07088831B2 Real-time audio source separation by delay and attenuation compensation in the time domain 有权
公开(公告)号：US07088831B2
公开(公告)日：2006-08-08
申请号：US10010255
申请日：2001-12-06
申请人： Justinian Rosca , Ning Ping Fan , Radu Victor Balan
发明人： Justinian Rosca , Ning Ping Fan , Radu Victor Balan
IPC分类号： H04R3/00
CPC分类号： H04R3/005 , G06K9/624
摘要： A system is provided for separating two audio channels recorded by an array of microphones. The system includes a calibration module for normalizing gain levels between a plurality of channels on each of a plurality of date frames, wherein each data frame is expressed in terms of time. The system further includes a delay parameter estimation module for accepting an output comprising the normalized channels, and estimating a delay parameter for a plurality of data frame sizes over a plurality of lag times, and sorting delays to generate corresponding source separated outputs.

2. 发明申请

US20090323528A1 Method and Apparatus to Inspect Wireless Traffic and Mitigate Packet Elimination for Wireless Saturation Avoidance 有权
标题翻译：检测无线通信的方法和设备，减少无线饱和度避免的数据包消除
公开(公告)号：US20090323528A1
公开(公告)日：2009-12-31
申请号：US12206053
申请日：2008-09-08
申请人： Michael T. Loiacono , Justinian Rosca , Octavian Sarca , Radu Victor Balan
发明人： Michael T. Loiacono , Justinian Rosca , Octavian Sarca , Radu Victor Balan
IPC分类号： H04L12/56
CPC分类号： H04L47/10 , H04L41/142 , H04L43/0882 , H04L47/11 , H04L47/12 , H04L47/14 , H04L47/263 , H04L47/29 , H04L47/32 , Y02D50/10
摘要： A method for controlling packet flow in a packet transmission network. The method includes determining a parameter representative of packet congestion on the network, and adjusting a flow of packets onto the network in accordance with such parameter. The adjusting is a function of the time history of the parameter and the time average of such parameter relative to predetermined threshold levels. The adjusting selects one of a plurality of states, transitions between the states being a function of the time history of the parameter and the time average of such parameter relative to predetermined threshold levels.
摘要翻译：一种用于控制分组传输网络中的分组流的方法。该方法包括确定表示网络上的分组拥塞的参数，以及根据该参数调整分组到网络上的流。调整是参数的时间历程和这种参数相对于预定阈值水平的时间平均的函数。调整选择多个状态之一，状态之间的转换是参数的时间历程和相对于预定阈值水平的这种参数的时间平均的函数。

3. 发明授权

US07302066B2 Method for eliminating an unwanted signal from a mixture via time-frequency masking 有权
标题翻译：通过时频屏蔽从混合中消除不需要的信号的方法
公开(公告)号：US07302066B2
公开(公告)日：2007-11-27
申请号：US10678372
申请日：2003-10-03
申请人： Radu Victor Balan , Scott Rickard , Justinian Rosca
发明人： Radu Victor Balan , Scott Rickard , Justinian Rosca
IPC分类号： H04B3/00
CPC分类号： G10L21/0208 , G10L2021/02165
摘要： A method is presented for eliminating an unwanted signal (e.g., background music, interference, etc.) from a mixture of a desired signal and the unwanted signal via time-frequency masking. Given a mixture of the desired signal and the unwanted signal, the goal of the present invention is to eliminate or at least reduce the effects of the unwanted signal to obtain an estimate of the desired signal.
摘要翻译：提出了一种用于通过时频屏蔽从期望信号和不期望信号的混合中消除不需要的信号（例如，背景音乐，干扰等）的方法。给定期望信号和不想要的信号的混合，本发明的目标是消除或至少减少不想要的信号的影响以获得期望信号的估计。

4. 发明授权

US07218741B2 System and method for adaptive multi-sensor arrays 有权
标题翻译：自适应多传感器阵列的系统和方法
公开(公告)号：US07218741B2
公开(公告)日：2007-05-15
申请号：US10454849
申请日：2003-06-04
申请人： Radu Victor Balan , Justinian Rosca , Liang Hong , Volkmar Hamacher , Eghart Fischer
发明人： Radu Victor Balan , Justinian Rosca , Liang Hong , Volkmar Hamacher , Eghart Fischer
IPC分类号： H04R3/00
CPC分类号： H04R3/005 , G06K9/0057 , G10L2021/02166 , H04R25/407 , H04R2430/21 , H04R2499/13
摘要： An adaptive differential microphone array method comprises receiving a signal, estimating a measured signal spectral covariance matrix of the signal, and estimating a direction of arrival of the signal based on the measured signal spectral covariance matrix of the signal. The method further comprises determining a fractional delay, and applying a differential microphone array filter to the signal based on the direction of arrival and the fractional delay.
摘要翻译：自适应差分麦克风阵列方法包括：接收信号，估计所述信号的测量信号频谱协方差矩阵，以及基于所述信号的测量信号频谱协方差矩阵来估计所述信号的到达方向。该方法还包括确定分数延迟，以及基于到达方向和分数延迟将差分麦克风阵列滤波器应用于信号。

5. 发明授权

US07110944B2 Method and apparatus for noise filtering 失效
标题翻译：用于噪声滤波的方法和装置
公开(公告)号：US07110944B2
公开(公告)日：2006-09-19
申请号：US11191105
申请日：2005-07-27
申请人： Radu Victor Balan , Justinian Rosca
发明人： Radu Victor Balan , Justinian Rosca
IPC分类号： G10L21/02
CPC分类号： G10L21/0208 , H04R3/005
摘要： A method of filtering noise from a mixed sound signal to obtain a filtered target signal, includes inputting the mixed signal through a plurality of sensors into a plurality of channels, separately Fourier transforming each the mixed signal into the frequency domain, computing a signal short-time spectral amplitude |Ŝ| from the transformed signals, computing a signal short-time spectral complex exponential ei arg(S) from said transformed signals, where arg(S) is the phase of the target signal in the frequency domain, computing said target signal S in the frequency domain from said spectral amplitude and said complex exponential, and computing a spectral power matrix and using the spectral power matrix to compute the spectral amplitude and the spectral complex exponential.
摘要翻译：一种从混合声音信号中滤除噪声以获得滤波的目标信号的方法，包括通过多个传感器将混合信号输入多个信道，将混合信号中的每一个分别进行傅里叶变换到频域，时间谱振幅| S | 从变换的信号中，从所述变换的信号计算信号短时频谱复指数e（S），其中arg（S）是频域中的目标信号的相位，计算从所述频谱幅度和所述复指数的频域中的所述目标信号S，并计算频谱功率矩阵并使用频谱功率矩阵来计算频谱幅度和频谱复数指数。

6. 发明授权

US06868365B2 Optimal ratio estimator for multisensor systems 失效
标题翻译：多传感器系统的最优比率估计器
公开(公告)号：US06868365B2
公开(公告)日：2005-03-15
申请号：US10435206
申请日：2003-05-09
申请人： Radu Victor Balan , Justinian Rosca
发明人： Radu Victor Balan , Justinian Rosca
IPC分类号： G06K9/00 , G06K9/62 , G06F15/17
CPC分类号： G06K9/6245
摘要： A signal processing technique can be effectively used for source separation, signal enhancement, and noise reduction when using a twin microphone system. The class of stochastic signals for which ratio-estimates can be computed from histograms is defined. This class fits real-world signals of interest such as voice signals. Theoretical computation in closed form of the optimal estimator for this class of signals is disclosed. Two practical implementation solutions are disclosed, as is a practical solution to exploit an echoic environment model. Furthermore, two novel techniques for signal demixing are presented. The application of the optimal estimator and the suboptimal estimator to the case of more than two channels is disclosed.
摘要翻译：当使用双麦克风系统时，信号处理技术可以有效地用于源分离，信号增强和降噪。定义可以从直方图计算比率估计的随机信号类。这个类适合现实世界的信号，如语音信号。公开了这类信号的最优估计器的封闭形式的理论计算。公开了两个实际的实现解决方案，作为利用回波环境模型的实际解决方案。此外，提出了两种用于信号分类的新颖技术。公布了最佳估计器和次优估计器在多于两个通道情况下的应用。

7. 发明授权

US07916658B2 Method for congestion detection in packet transmission networks 有权
标题翻译：分组传输网络拥塞检测方法
公开(公告)号：US07916658B2
公开(公告)日：2011-03-29
申请号：US12206069
申请日：2008-09-08
申请人： Radu Victor Balan , Chih-Wei Huang , Justinian Rosca , Octavian Sarca
发明人： Radu Victor Balan , Chih-Wei Huang , Justinian Rosca , Octavian Sarca
IPC分类号： G06F11/30 , H04L12/56
CPC分类号： H04L47/10 , H04L43/00 , H04L43/0847 , H04L43/0888 , H04L43/0894 , H04L47/11 , H04L47/14 , H04L47/28 , H04W28/10
摘要： A method for measuring degree of packet congestion on a channel of a packet communication network. The method includes: during a training mode, generating an mathematical relationship between the degree of packet congestion on the channel and a plurality of measurable features of the network over a plurality of network conditions; and, during a subsequent normal operating mode, periodically measuring the plurality of measurable features and applying the generated mathematical relationship to such periodically measured plurality of measurable features to determine actual degree of congestion on the channel; and comparing the actual degree of congestion on the channel with a predetermined channel congestion threshold level. The degree of packet congestion on the channel is saturation level. The measurable features include: time delay between transmission starts and terminations of the previously transmitted packet; the fraction of time the channel is busy; and, average number of packet transmission retries.
摘要翻译：一种用于测量分组通信网络的信道上的分组拥塞程度的方法。该方法包括：在训练模式期间，在多个网络条件下，在信道上的分组拥塞程度与网络的多个可测量特征之间产生数学关系; 并且在随后的正常操作模式期间，周期性地测量所述多个可测量特征并将所生成的数学关系应用于所述周期性测量的多个可测量特征以确定所述信道上的实际拥塞程度; 以及将所述信道上的实际拥塞程度与预定信道拥塞阈值级别进行比较。信道上的分组拥塞程度是饱和度。可测量的特征包括：传输开始之间的时间延迟和先前发送的分组的终止; 频道繁忙时间的一小部分; 并且平均分组传输重试次数。

8. 发明授权

US07839793B2 Method and apparatus for estimating collision probability in a wireless network 有权
标题翻译：用于估计无线网络中的冲突概率的方法和装置
公开(公告)号：US07839793B2
公开(公告)日：2010-11-23
申请号：US12206059
申请日：2008-09-08
申请人： Radu Victor Balan , Justinian Rosca
发明人： Radu Victor Balan , Justinian Rosca
IPC分类号： H04L12/26
CPC分类号： H04W24/00 , H04L41/142 , H04L41/147 , H04L43/0829 , H04L43/16 , H04W88/08
摘要： A method for estimating packet collisions within a wireless network, comprising: for each transmit packet an Access Point (AP) of the network records statistics transmission information; based on this statistical information the AP computes: Total number of slot times generated during this transmission, n; Total number of deferrals, m; and Total number of unsuccessful transmissions, Q s; and using a sequence (m,n,Q) of statistics for each access category (AC), the AP computes the probability of collision for unsuccessful packets, p.
摘要翻译：一种用于估计无线网络内的分组冲突的方法，包括：对于每个发送分组，所述网络的接入点（AP）记录统计传输信息; 基于该统计信息，AP计算：在该传输期间生成的时隙总数，n; 延期总数，m; 和不成功的传输总数，Q s; 并且使用每个接入类别（AC）的统计序列（m，n，Q），AP计算不成功分组的冲突概率p。

9. 发明申请

US20090141650A1 Method for Congestion Detection in Packet Transmission Networks 有权
标题翻译：分组传输网络拥塞检测方法
公开(公告)号：US20090141650A1
公开(公告)日：2009-06-04
申请号：US12206069
申请日：2008-09-08
申请人： Radu Victor Balan , Chih-Wei Huang , Justinian Rosca , Octavian Sarca
发明人： Radu Victor Balan , Chih-Wei Huang , Justinian Rosca , Octavian Sarca
IPC分类号： G06F11/30
CPC分类号： H04L47/10 , H04L43/00 , H04L43/0847 , H04L43/0888 , H04L43/0894 , H04L47/11 , H04L47/14 , H04L47/28 , H04W28/10
摘要： A method for measuring degree of packet congestion on a channel of a packet communication network. The method includes: during a training mode, generating an mathematical relationship between the degree of packet congestion on the channel and a plurality of measurable features of the network over a plurality of network conditions; and, during a subsequent normal operating mode, periodically measuring the plurality of measurable features and applying the generated mathematical relationship to such periodically measured plurality of measurable features to determine actual degree of congestion on the channel; and comparing the actual degree of congestion on the channel with a predetermined channel congestion threshold level. The degree of packet congestion on the channel is saturation level. The measurable features include: time delay between transmission starts and terminations of the previously transmitted packet; the fraction of time the channel is busy; and, average number of packet transmission retries.
摘要翻译：一种用于测量分组通信网络的信道上的分组拥塞程度的方法。该方法包括：在训练模式期间，在多个网络条件下，在信道上的分组拥塞程度与网络的多个可测量特征之间产生数学关系; 并且在随后的正常操作模式期间，周期性地测量所述多个可测量特征并将所生成的数学关系应用于所述周期性测量的多个可测量特征以确定所述信道上的实际拥塞程度; 以及将所述信道上的实际拥塞程度与预定信道拥塞阈值级别进行比较。信道上的分组拥塞程度是饱和度。可测量的特征包括：传输开始之间的时间延迟和先前发送的分组的终止; 频道繁忙时间的一小部分; 并且平均分组传输重试次数。

10. 发明授权

US07146315B2 Multichannel voice detection in adverse environments 有权
标题翻译：不利环境中的多声道语音检测
公开(公告)号：US07146315B2
公开(公告)日：2006-12-05
申请号：US10231613
申请日：2002-08-30
申请人： Radu Victor Balan , Justinian Rosca , Christophe Beaugeant
发明人： Radu Victor Balan , Justinian Rosca , Christophe Beaugeant
IPC分类号： G10L15/20
CPC分类号： G10L25/78 , G10L2021/02165
摘要： A multichannel source activity detection system, e.g., a voice activity detection (VAD) system, and method that exploits spatial localization of a target audio source is provided. The method includes the steps of receiving a mixed sound signal by at least two microphones; Fast Fourier transforming each received mixed sound signal into the frequency domain; filtering the transformed signals to output a signal corresponding to a spatial signature of a source; summing an absolute value squared of the filtered signal over a predetermined range of frequencies; and comparing the sum to a threshold to determine if a voice is present. Additionally, the filtering step includes multiplying the transformed signals by an inverse of a noise spectral power matrix, a vector of channel transfer function ratios, and a source signal spectral power.
摘要翻译：提供了多通道源活动检测系统，例如语音活动检测（VAD）系统和利用目标音频源的空间定位的方法。该方法包括通过至少两个麦克风接收混合声音信号的步骤; 将每个接收的混合声音信号快速傅里叶变换到频域; 对经变换的信号进行滤波以输出与源的空间签名相对应的信号; 在预定的频率范围内对滤波信号的绝对值进行求和; 以及将所述和与阈值进行比较以确定是否存在语音。另外，滤波步骤包括将经变换的信号乘以噪声频谱功率矩阵的倒数，信道传递函数比的向量和源信号频谱功率。

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