公开(公告)号：US20070014419A1

公开(公告)日：2007-01-18

申请号：US10596122

申请日：2004-08-11

申请人： Brenton Steele

发明人： Brenton Steele

IPC分类号： H04R3/00

CPC分类号： H04R1/406 ,  H04R3/005 ,  H04R25/407 ,  H04R2499/11

摘要： The invention relates to adaptive directional systems, and more particularly to a method and apparatus for producing adaptive directional signals. The invention may be applied to the provision of audio frequency adaptive directional microphone systems for devices such as hearing aids and mobile telephones. The method involves constructing the adaptive directional signal (46) from a weighted sum of a first signal (42A) having an omni-directional polar pattern and a second signal (42B) having a bi-directional polar pattern, wherein the weights are calculated to give the combined signal a constant gain in a predetermined direction and to minimise the power of the combined signal. The method has particular application in producing signals in digital hearing aids, the predetermined direction being in the forward direction with respect to the wearer.

摘要翻译： 本发明涉及自适应定向系统，更具体地涉及用于产生自适应方向信号的方法和装置。 本发明可以应用于为诸如助听器和移动电话的设备提供音频自适应定向麦克风系统。 该方法包括从具有全向极坐标图案的第一信号（42A）和具有双向极坐标图案的第二信号（42B）的加权和构建自适应方向信号（46），其中权重为 被计算为使组合信号在预定方向上具有恒定增益并且使组合信号的功率最小化。 该方法特别适用于在数字助听器中产生信号，预定方向相对于佩戴者处于向前方向。

公开(公告)号：US20070106530A1

公开(公告)日：2007-05-10

申请号：US10557534

申请日：2004-05-26

申请人： Peter Blamey ,  Benjamin Smith ,  Brenton Steele

发明人： Peter Blamey ,  Benjamin Smith ,  Brenton Steele

IPC分类号： G06Q10/00

CPC分类号： H04R3/02 ,  G06Q50/22 ,  H04R25/453

摘要： The invention relates to oscillation suppression and, more particularly, concerns a method and apparatus for suppressing oscillation in a signal identified as or suspected of containing an oscillation due to feedback. The method involves converting the signal into frequency bands in the frequency domain, applying, for a selected period of time, a randomly changing phase to the signal in at least one of said frequency bands, and reconverting the converted signal into an output wave form signal. The selected period is divided into a series of successive time windows, and for each successive time window a newly generated random or pseudo-random phase is applied to the signal. The method can be used in combination with a method for detecting oscillation in said signal in each of the frequency bands, a randomly changing phase applied in each frequency band for which said oscillation has been detected. The invention has particular application in hearing aid devices.

摘要翻译： 本发明涉及振荡抑制，更具体地说，涉及一种用于抑制由于反馈而被识别为或怀疑包含振荡的信号中的振荡的方法和装置。 该方法包括将信号转换成频域中的频带，在选定的时间段内将随机改变的相位施加到至少一个所述频带中的信号，并将转换的信号重新转换为输出波形信号 。 所选择的周期被分成一系列连续的时间窗口，并且对于每个连续的时间窗口，新产生的随机或伪随机相位被施加到该信号。 该方法可以与用于检测每个频带中的所述信号中的振荡的方法组合使用，在已经检测到所述振荡的每个频带中应用随机变化的相位。 本发明在助听器装置中具有特别的应用。

公开(公告)号：US20060126865A1

公开(公告)日：2006-06-15

申请号：US11011493

申请日：2004-12-13

申请人： Peter Blamey ,  Bonar Dickson ,  Brenton Steele ,  Margaret Steinberg

发明人： Peter Blamey ,  Bonar Dickson ,  Brenton Steele ,  Margaret Steinberg

IPC分类号： H03G7/00 ,  H03G9/00

CPC分类号： H03G9/005 ,  H03G3/32 ,  H03G7/08 ,  H03G9/025

摘要： An input sound signal (210) is processed in order to meet a target dynamic range (910, 920). At least one gain, specific to the input sound signal (210), is applied to the input sound signal (210) to produce a processed sound signal (214). A dynamic range of the processed sound signal is measured, and a match of the measured dynamic range with the target dynamic range (910, 920) is determined. The gain is adjusted in accordance with at least one input sound signal-specific parameter, to improve the match of dynamic range of the processed sound signal (214) to the target dynamic range (910, 920). The input sound signal-specific parameter is adaptive in response to at least one monitored signal condition.

摘要翻译： 处理输入声音信号（210）以便满足目标动态范围（910,920）。 特定于输入声音信号（210）的至少一个增益被施加到输入声音信号（210）以产生经处理的声音信号（214）。 测量经处理的声音信号的动态范围，并且确定所测量的动态范围与目标动态范围（910,920）的匹配。 根据至少一个输入声音信号特定参数来调整增益，以改善经处理的声音信号（214）的动态范围与目标动态范围（910,920）的匹配。 响应于至少一个监视信号条件，输入声音信号特定参数是自适应的。

公开(公告)号：US20070118367A1

公开(公告)日：2007-05-24

申请号：US11283540

申请日：2005-11-18

申请人： Bonar Dickson ,  Brenton Steele

发明人： Bonar Dickson ,  Brenton Steele

IPC分类号： G10L19/12

CPC分类号： G10L19/0204 ,  H03H21/0027

摘要： Adaptive processing of an input signal is achieved by offline analysis, with inline processing comprising an adaptive filter. The method comprises passing the input signal through an adaptive time domain filter to produce an output signal. The input signal and/or output signal is used as an offline analysis signal. The analysis signal is transformed into a transform domain (eg frequency domain) to produce a transformed analysis signal. The transformed analysis signal is analysed, for example by ADRO, to produce a plurality of desired gains each corresponding to a respective transform domain sub-band. A time domain filter characteristic is synthesised to at least approach the desired gains. The adaptive filter is updated with the synthesised filter characteristic. Minimum phase adaptive filter techniques are found to possess particular benefits in this scheme.

摘要翻译： 通过离线分析实现输入信号的自适应处理，其中内联处理包括自适应滤波器。 该方法包括使输入信号通过自适应时域滤波器以产生输出信号。 输入信号和/或输出信号用作离线分析信号。 分析信号被转换成变换域（例如频域）以产生变换分析信号。 例如通过ADRO分析变换的分析信号，以产生多个期望的增益，每个增益对应于相应的变换域子带。 合成时域滤波器特性以至少接近期望的增益。 自适应滤波器用合成滤波器特性进行更新。 发现最小相位自适应滤波技术在该方案中具有特别的优点。