-
1.发明授权Adaptive identification method and device, and adaptive echo canceller implementing such method 有权自适应识别方法和装置，以及实现这种方法的自适应回波消除器公开(公告)号：US06895094B1
公开(公告)日：2005-05-17
申请号：US09528952
申请日：2000-03-20
Applicant: Pascal Scalart , Franck Bouteille
Inventor： Pascal Scalart , Franck Bouteille
Abstract: The device receives an input signal xt and an observation signal yt, one component of which is the response of a system to the input signal. It determines an error signal et at an instant t in accordance with the equation et=yt−XtTHt−1, where Ht−1 is a vector made up of L coefficients of an identification filter having a finite impulse response representative of the impulse response of the system and XtT=(xt, xt−1, . . . , xt−L+1). A predictive analysis of the input signal is performed by a computation applied to frames of the input signal. The L coefficients of the identification filter are adapted by adding to the vector Ht−1 a vector proportional to e t X t T U t + λ U t , where Ut is a vector made up of the L values of a prediction residue of the input signal at the instant t and at the preceding L−1 instants, and λ is a positive or zero coefficient.
Abstract translation: 该装置接收一个输入信号和一个观测信号，其一个分量是系统对输入信号的响应。 它根据等式e在时刻t确定一个误差信号e t t t t t t T t t t t 其中H t-1是由具有有限脉冲的识别滤波器的L个系数组成的向量，其中，H t-1 < 表示系统的脉冲响应的响应，以及X
，...，x T-L + 1）。 通过应用于输入信号的帧的计算来执行输入信号的预测分析。 标识滤波器的L个系数通过将与 -
Patent Agency Ranking
公开(公告)号：US07313518B2
公开(公告)日：2007-12-25
申请号：US10466816
申请日：2001-11-19
Applicant: Pascal Scalart , Claude Marro , Laurent Mauuary
Inventor： Pascal Scalart , Claude Marro , Laurent Mauuary
IPC: G10L21/02
CPC classification number: G10L21/0208
Abstract: The device calculates a first frequency-dependent useful signal level estimator for the frame. The transfer function of a first noise-reducing filter is determined on the basis of the first useful signal level estimator and of a frequency-dependent noise level estimator. A second frequency-dependent useful signal level estimator for the frame is then calculated by combining the spectrum of the input signal and the transfer function of the first noise-reducing filter. The transfer function of a second noise-reducing filter is determined on the basis of the second useful signal level estimator and of the noise level estimator. The latter transfer function is used in a frame filtering operation to produce a signal with reduced noise.
Abstract translation: 该装置计算该帧的第一频率相关有用信号电平估计器。 基于第一有用信号电平估计器和频率依赖噪声电平估计器来确定第一降噪滤波器的传递函数。 然后通过组合输入信号的频谱和第一噪声降低滤波器的传递函数来计算用于该帧的第二频率相关有用信号电平估计器。 基于第二有用信号电平估计器和噪声电平估计器确定第二降噪滤波器的传递函数。 后一种传递函数用于帧滤波操作以产生具有降低的噪声的信号。
-
3.发明授权Method of processing a noisy sound signal and device for implementing said method 有权用于处理噪声信号的方法和用于实现所述方法的装置公开(公告)号：US07359838B2
公开(公告)日：2008-04-15
申请号：US11662979
申请日：2005-09-14
Applicant: Claude Marro , Cyril Plapous , Pascal Scalart
Inventor： Claude Marro , Cyril Plapous , Pascal Scalart
Abstract: The invention relates to a method of processing a noisy sound signal and to a device for implementing said method. The inventive method includes the following steps which are performed for each frame of a noisy sound signal, consisting in: applying a frequency-domain transform; estimating a power spectral density (PSD) of the noise for the frame; calculating a first noise reduction filter from the estimated PSD of the noise and from an estimation of the PSD of a wanted signal corresponding to the frame; filtering the frame with the aid of the calculated noise reduction filter, in order to obtain a first noise-corrected estimation for the frame; and obtaining a frame of a second signal from the first noise-corrected estimation of the aforementioned frame, comprising harmonics which are essentially at the same positions as the wanted signal corresponding to the frame of the noisy sound signal.
Abstract translation: 本发明涉及一种处理嘈杂声音信号的方法以及用于实现所述方法的装置。 本发明的方法包括对噪声声音信号的每个帧执行的以下步骤，其包括：应用频域变换; 估计帧的噪声的功率谱密度（PSD）; 根据噪声的估计PSD和对应于该帧的有用信号的PSD的估计来计算第一降噪滤波器; 借助于所计算的噪声降低滤波器对帧进行滤波，以便获得帧的第一噪声校正估计; 并且从上述帧的第一噪声校正估计中获得第二信号的帧，包括基本上与对应于噪声声音信号的帧的有用信号相同位置的谐波。
-
4.发明授权Method and device for the optimized processing of a disturbing signal during a sound capture 失效用于在声音捕获期间优化处理干扰信号的方法和装置
公开(公告)号：US6122609A
公开(公告)日：2000-09-19
申请号：US93740
申请日：1998-06-08
Applicant: Pascal Scalart , Andre Gilloire
Inventor： Pascal Scalart , Andre Gilloire
Abstract: A method and a device adapted to hands-free mobile radiotelephony for the optimized processing of a disturbing signal during a sound capture, on the basis of an observation signal y(t) formed of an original useful signal s(t) and of this disturbing signal p(t), the disturbing signal is estimated as a signal p(t) and the useful signal as an estimated useful signal su. An optimal filtering of the observation signal y(t) is carried out on the basis of the signal p(t) and of a minimizing of the error e(su,su) between the useful signal su and the estimated useful signal su. The estimated useful signal su and the useful signal converge towards the original useful signal s(t) for a substantially zero error e(su,su).
Abstract translation: 基于由原始有用信号s（t）形成的观测信号y（t）和这种干扰的方法和装置，适用于免提移动无线电话，用于在声音捕获期间对干扰信号进行优化处理 信号p（t），扰动信号被估计为信号+ E，cir p + EE（t），有用信号被估计为估计有用信号+ E，cir s + EE u。 基于信号+ E，cir p + EE（t）和最小化误差e（su，+ E，cir s + EE u）来进行观测信号y（t）的最优滤波， 在有用信号su和估计有用信号+ E，cir s + EE u之间。 对于基本为零误差e（su，+ E，cir s + EE u），估计的有用信号+ E，cir s + EE u和有用信号朝着原始有用信号s（t）收敛。
-
公开(公告)号：US07023986B2
公开(公告)日：2006-04-04
申请号：US10149027
申请日：2000-12-08
Applicant: Pascal Scalart , Grégoire Le Tourneur , Franck Bouteille , Christophe Beaugeant
Inventor： Pascal Scalart , Grégoire Le Tourneur , Franck Bouteille , Christophe Beaugeant
IPC: H04M1/00
CPC classification number: H04M9/082
Abstract: A terminal in a communication system includes emitting and receiving transducers and an echo processor having an adaptive echo canceler that processes a residual echo output from the adaptive echo canceler.
Abstract translation: 通信系统中的终端包括发射和接收换能器以及具有自适应回波消除器的回波处理器，其处理来自自适应回波消除器的残留回波输出。
-
6.发明授权Process and device for adaptive identification and adaptive echo canceller relating thereto 失效用于自适应识别和自适应回波消除器的过程和设备
公开(公告)号：US5734715A
公开(公告)日：1998-03-31
申请号：US705529
申请日：1996-08-29
Applicant: Pascal Scalart , Pierre Duhamel , Abdelkrim Benamar
Inventor： Pascal Scalart , Pierre Duhamel , Abdelkrim Benamar
IPC: G10K11/178 , H03H17/02 , H03H21/00 , H04B3/23 , H04M1/60 , H04M9/08 , H04R3/02 , H04R29/00 , H04M9/00
CPC classification number: H04R3/02 , H04B3/23 , H04M9/082 , H04M9/085 , H03H2021/0078 , H03H2021/0089
Abstract: To estimate the response of a system to an input signal, on the one hand the input signal and on the other hand an observation signal, a component of which is said response to the input signal, are received, an error signal is determined by subtracting from the observation signal the input signal filtered by an identification filter representative of the response of said system, and the coefficients of the identification filter are adapted by taking into account the input signal and the error signal. If the adaptation takes into account an adaption stepsize .mu..sub.t, the latter is varied according to: .mu..sub.t =a/(c+d. P2.sub.t /P1.sub.t), where a, c and d denote positive constants, P1.sub.t denotes an estimate of the power of the input signal and P2.sub.t denotes an estimate of the power of the observation signal or of a disturbance component of said observation signal. The variable .mu..sub.t can also be employed to adapt the gains of an echo canceller with adaptive gains.
Abstract translation: 为了估计系统对输入信号的响应，一方面接收输入信号，另一方面接收一个分量是对输入信号的响应的观测信号，通过减去误差信号来确定误差信号 从观察信号中，通过表示所述系统的响应的识别滤波器滤波的输入信号和识别滤波器的系数通过考虑输入信号和误差信号来适应。 如果适应性考虑到适应步长度μ，则后者根据μt = a /（c + d。P2t / P1t）而变化，其中a，c和d表示正常数，P1t表示 输入信号的功率和P2t表示观测信号的功率或所述观测信号的干扰分量的估计。 也可以采用变量μt来使回波消除器的增益适应自适应增益。
-
-
-
-
-
Search Results
6
records
(took 0.01 seconds)
