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1. 发明授权

US07584235B2 Variable passband autoregressive moving average filter 有权
标题翻译：可变通带自回归移动平均滤波器
公开(公告)号：US07584235B2
公开(公告)日：2009-09-01
申请号：US10804663
申请日：2004-03-18
申请人： Kevin M. Ferguson
发明人： Kevin M. Ferguson
IPC分类号： G06F17/10
CPC分类号： H03H17/0258 , H03H17/0416 , H03H2017/0247
摘要： A variable passband ARMA filter has as inputs a signal to be filtered, a reverse version of the signal to be filtered and a variable coefficient to produce as an output a filtered signal. The variable coefficient is generated by a variable equivalent sample rate coefficient converter having as inputs an initial coefficient and a variable resampling rate parameter which controls the passband.
摘要翻译：可变通带ARMA滤波器具有要滤波的信号，要滤波的信号的反向版本和可变系数，以产生滤波信号作为输出。可变系数由具有作为输入的可变等效采样率系数转换器产生，初始系数和控制通带的可变重采样率参数。

2. 发明授权

US08756265B1 Audio filter bank design 失效
标题翻译：音频滤波器组设计
公开(公告)号：US08756265B1
公开(公告)日：2014-06-17
申请号：US13097633
申请日：2011-04-29
申请人： Shalom Halevy , Douglas A. Moore
发明人： Shalom Halevy , Douglas A. Moore
IPC分类号： G06F17/10
CPC分类号： H03H17/0258 , H03H17/0266
摘要： A system, method, and computer program product are provided for reducing ripple in a filter bank. For a given fixed number of linearly-spaced filters in the filter bank, a monotonically increasing function for a Q-factor is specified for the filter bank. Adjustments to each filter's Q-factor based on the Q-factor function are made in order to produce a nearly constant filter bank ripple throughout the filter bank's frequency response range.
摘要翻译：提供了一种用于减少滤波器组中的纹波的系统，方法和计算机程序产品。对于滤波器组中给定的固定数量的线性间隔滤波器，为滤波器组指定了用于Q因子的单调递增函数。基于Q因子函数对每个滤波器的Q因子进行调整，以便在滤波器组的频率响应范围内产生几乎恒定的滤波器组纹波。

3. 发明申请

US20060129389A1 Spectrum modeling 审中-公开
标题翻译：频谱建模
公开(公告)号：US20060129389A1
公开(公告)日：2006-06-15
申请号：US11345993
申请日：2006-02-02
申请人： Albertus Den Brinker , Arnoldus Oomen
发明人： Albertus Den Brinker , Arnoldus Oomen
IPC分类号： G10L19/04
CPC分类号： G10L19/06 , G10L21/0208 , G10L25/12 , G10L25/18 , H03H17/0258
摘要： Modeling a target spectrum (S) is provided by determining (21) filter parameters (pi,qi) of a filter which has a frequency response approximating the target spectrum (S), wherein the target spectrum is split in at least a first part and a second part, a first modeling operation is used on the first part of the target spectrum to obtain auto-regressive parameters, a second modeling operation is used on the second part of the target spectrum to obtain moving-average parameters, and the auto-regressive parameters and the moving-average parameters are combined to obtain the filter parameters. The invention is preferably applied in audio coding, wherein a spectrum of a noise component (S) in the signal (A) is modeled.
摘要翻译：通过确定具有近似于目标光谱的频率响应的滤波器的滤波器参数（21），来提供对目标频谱（S）的建模（ S），其中目标光谱在至少第一部分和第二部分中分裂，在目标光谱的第一部分上使用第一建模操作以获得自回归参数，在第二部分使用第二建模操作获得移动平均参数的目标频谱的一部分，并且组合自回归参数和移动平均参数以获得滤波器参数。本发明优选地应用于音频编码，其中对信号（A）中的噪声分量（S）的频谱进行建模。

4. 发明申请

US20050210092A1 Variable passband autoregressive moving average filter 有权
标题翻译：可变通带自回归移动平均滤波器
公开(公告)号：US20050210092A1
公开(公告)日：2005-09-22
申请号：US10804663
申请日：2004-03-18
申请人： Kevin Ferguson
发明人： Kevin Ferguson
IPC分类号： G06F17/10 , H03H17/02
CPC分类号： H03H17/0258 , H03H17/0416 , H03H2017/0247
摘要： A variable passband ARMA filter has as inputs a signal to be filtered, a reverse version of the signal to be filtered and a variable coefficient to produce as an output a filtered signal. The variable coefficient is generated by a variable equivalent sample rate coefficient converter having as inputs an initial coefficient and a variable resampling rate parameter which controls the passband.
摘要翻译：可变通带ARMA滤波器具有要滤波的信号，要滤波的信号的反向版本和可变系数，以产生滤波信号作为输出。可变系数由具有作为输入的可变等效采样率系数转换器产生，初始系数和控制通带的可变重采样率参数。

5. 发明授权

US09641157B2 Method and device for filtering during a change in an ARMA filter 有权
公开(公告)号：US09641157B2
公开(公告)日：2017-05-02
申请号：US14005801
申请日：2012-03-14
申请人： Alexandre Guerin , Julien Faure , Claude Marro
发明人： Alexandre Guerin , Julien Faure , Claude Marro
IPC分类号： H03H21/00 , H03H17/02
CPC分类号： H03H17/0258 , G10H2250/081 , H03H17/0294 , H03H21/0032 , H03H2017/0295
摘要： A method and device are provided for filtering digital audio signals using at least one ARMA filter, particularly during a filter change. The method includes the following steps: a step of receiving a first request to change filtering to or from filtering by a first ARMA filter; and, in response to the first request, a step of gradually switching, at each of a plurality of cascaded first filtering blocks, between digital-signal filtering by a first basic filtering cell and digital-signal filtering by another associated basic filtering cell, the first basic filtering cells of the plurality of first filtering blocks factorizing the first filter.

6. 发明申请

US20140019504A1 METHOD AND DEVICE FOR FILTERING DURING A CHANGE IN AN ARMA FILTER 有权
标题翻译：在ARMA过滤器中更换过滤器的方法和装置
公开(公告)号：US20140019504A1
公开(公告)日：2014-01-16
申请号：US14005801
申请日：2012-03-14
申请人： Alexandre Guerin , Julien Faure , Claude Marro
发明人： Alexandre Guerin , Julien Faure , Claude Marro
IPC分类号： H03H17/02
CPC分类号： H03H17/0258 , G10H2250/081 , H03H17/0294 , H03H21/0032 , H03H2017/0295
摘要： A method and device are provided for filtering digital audio signals using at least one ARMA filter, particularly during a filter change. The method includes the following steps: a step of receiving a first request to change filtering to or from filtering by a first ARMA filter; and, in response to the first request, a step of gradually switching, at each of a plurality of cascaded first filtering blocks, between digital-signal filtering by a first basic filtering cell and digital-signal filtering by another associated basic filtering cell, the first basic filtering cells of the plurality of first filtering blocks factorizing the first filter.
摘要翻译：提供了一种用于使用至少一个ARMA滤波器来滤波数字音频信号的方法和装置，特别是在滤波器改变期间。该方法包括以下步骤：接收向第一ARMA滤波器滤波或从第一ARMA滤波器滤波的第一请求的步骤; 并且响应于所述第一请求，在多个级联的第一滤波块中的每一个在由第一基本滤波单元进行数字信号滤波之间和由另一相关联的基本滤波单元进行数字信号滤波之间逐渐切换的步骤，所述多个第一滤波块中的第一基本滤波单元对所述第一滤波器进行分解。

7. 发明授权

US4188667A ARMA filter and method for designing the same 失效
标题翻译： ARMA滤波器及其设计方法
公开(公告)号：US4188667A
公开(公告)日：1980-02-12
申请号：US852917
申请日：1977-11-18
申请人： Daniel Graupe , Aloysius A. Beex , G. Donald Causey
发明人： Daniel Graupe , Aloysius A. Beex , G. Donald Causey
IPC分类号： H04R25/04 , H03H11/04 , H03H17/02 , H03H17/04 , H04R25/00 , G06F15/34
CPC分类号： H04R25/505 , H03H17/0258 , H03H17/04 , H04R25/453
摘要： A near minimum order ARMA type recursive filter with guaranteed stability and convergence is provided together with a method for obtaining the parameters of such filter. The amplitude/frequency response of the filter approximates an arbitrarily selected frequency spectrum of amplitude, and the phase response approximates a substantially linear function of frequency with an arbitrarily selected slope because the parameters are identified, off-line, using a minimization process that minimizes an integral error norm. The first step involves performing an inverse discrete Fourier transform of the arbitrarily selected frequency spectrum of amplitude to obtain a truncated sequence of coefficients of a stable, pure moving-average filter model, i.e., the parameters of a non-recursive filter model. The truncated sequence of coefficients, which has N+1 terms, is then convolved with a random sequence to obtain an output sequence associated with the random sequence. A time-domain, convergent parameter identification is then performed, in a manner that minimizes an integral error function norm, to obtain the near minimum order parameters .alpha..sub.i and .beta..sub.j of the model having the desired amplitude- and phase-frequency responses, the parameters satisfying the relationship: ##EQU1## where: .alpha..sub.i is the ith auto-regressive parameter, and .beta..sub.j is the jth moving-average parameter, respectively, of an ARMA-type recursive filter; n and m denote the order of the auto-regressive and the moving-average parts of the ARMA model, respectively; y.sub.k and u.sub.k are associated elements of the kth element of the output sequence and the random sequence, respectively; k is an integer; and v is a shift integer selected to provide the desired slope of the phase response given by 2.pi.(v-N/2).
摘要翻译：提供具有保证稳定性和收敛性的近最小订单ARMA类型递归滤波器以及用于获得这种滤波器的参数的方法。滤波器的幅度/频率响应近似于任意选择的幅度频谱，并且相位响应以任意选择的斜率近似于频率的基本上线性的函数，因为参数被离线地识别，使用最小化处理使得积分误差范数。第一步涉及执行任意选择的振幅频谱的离散傅里叶逆变换，以获得稳定的纯移动平均滤波器模型的截断序列，即非递归滤波器模型的参数。具有N + 1项的截断的系数序列然后与随机序列进行卷积以获得与随机序列相关联的输出序列。然后以最小化积分误差函数范数的方式执行时域收敛参数识别，以获得具有期望幅度和相位频率响应的模型的近似最小阶次参数αi和βj，满足以下关系的参数：其中：αi是第i个自回归参数，βj分别是ARMA型递归滤波器的第j个移动平均参数; n和m分别表示ARMA模型的自回归和移动平均部分的顺序; yk和uk分别是输出序列的第k个元素和随机序列的相关元素; k是整数; 并且v是选择为提供由2π（v-N / 2）给出的相位响应的期望斜率的移位整数。

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