公开(公告)号：WO2008090342A3

公开(公告)日：2008-10-30

申请号：PCT/GB2008000237

申请日：2008-01-23

Applicant: WOLFSON MICROELECTRONICS PLC ,  SIBBALD ALASTAIR ,  HOWLE MARTIN

Inventor： SIBBALD ALASTAIR ,  HOWLE MARTIN

IPC: H04R3/00 ,  G10K11/178

CPC classification number: H04R3/00 ,  G10K11/178 ,  G10K2210/1081 ,  H04R1/1083

Abstract: The invention provides improved ambient noise reduction for ear-worn devices, such as earphones and headphones and for other devices worn upon or used in close proximity to the ear, such as cellular telephone handsets, and it provides, in particular, improvements to "feed-forward" ambient noise-reduction systems. Most feed-forward noise-reduction systems available hitherto purport to operate only below about 1 kHz and, even then, provide only relatively modest amounts of noise reduction. In accordance with this invention, predetermined filter parameters, such as the gain and cut-off frequency of a selected filter stage used in the noise-reduction processing, are mathematically modelled and the model is adjusted in real-time, in response to user-interpretation of a graphical display of a predicted residual noise amplitude spectrum. This allows the user to inspect the predicted residual noise level amplitude spectrum and to iteratively adjust the filter parameters to minimise residual noise in a chosen environment. Instead of being made manually by a user, the iterative adjustments may be automated and implemented under computer control, using known data-fitting methods and/or neural networks.

Abstract translation: 本发明为诸如耳机和头戴式耳机之类的耳戴式设备以及佩戴在耳朵上或靠近耳朵使用的其他设备（诸如蜂窝式电话手持设备）提供了改善的环境噪声降低，并且特别地提供了对“馈送 前向“环境降噪系统。 迄今为止，大多数可用的前馈降噪系统只能在约1kHz以下工作，即使这样，也只能提供相对适中的降噪量。 根据本发明，响应于用户定义的参数，在数学上建模预定的滤波器参数（例如在降噪处理中使用的选定滤波器级的增益和截止频率）并且实时调节模型， 解释预测的残余噪声振幅谱的图形显示。 这允许用户检查预测的残余噪声电平幅度谱并且迭代地调整滤波器参数以最小化所选环境中的残余噪声。 使用已知的数据拟合方法和/或神经网络，代替由用户手动进行，迭代调整可以被自动化并且在计算机控制下实现。

公开(公告)号：WO2008139155A8

公开(公告)日：2009-02-19

申请号：PCT/GB2008001601

申请日：2008-05-08

Applicant: WOLFSON MICROELECTRONICS PLC ,  SIBBALD ALASTAIR

Inventor： SIBBALD ALASTAIR

IPC: G10K11/178 ,  H04R3/00

CPC classification number: G10K11/16 ,  G10K11/178 ,  G10K2210/1081 ,  H04M1/6066 ,  H04M1/7253 ,  H04R1/1041 ,  H04R1/1083 ,  H04R5/033 ,  H04R2420/05 ,  H04R2499/11

Abstract: Noise reduction circuitry for a communication apparatus can apply different noise reduction transfer functions, depending on whether a listening device is connected to the apparatus. If no listening device is connected, the noise reduction transfer function can be adapted for use with microphones (12) and speakers (28) that form an integral part of the communication apparatus, which may be a cellular telephone. If a listening device is connected, the noise reduction transfer function can be adapted for use with microphones (12) and speakers (28) that form a part of the listening device. This allows the noise reduction circuitry to provide improved noise reduction performance.

Abstract translation: 用于通信设备的降噪电路可以根据听音设备是否连接到该设备来应用不同的降噪传递功能。 如果没有连接听音装置，则降噪传递功能可适用于形成通信装置的组成部分的麦克风（12）和扬声器（28），扬声器可以是蜂窝电话。 如果连接了听音装置，则降噪传递功能可适用于构成听音装置一部分的麦克风（12）和扬声器（28）。 这允许降噪电路提供改进的降噪性能。

公开(公告)号：WO2008096125A3

公开(公告)日：2009-01-15

申请号：PCT/GB2008000403

申请日：2008-02-06

Applicant: WOLFSON MICROELECTRONICS PLC ,  CLEMOW RICHARD ,  SIBBALD ALASTAIR ,  ALCOCK ROBERT DAVID

Inventor： CLEMOW RICHARD ,  SIBBALD ALASTAIR ,  ALCOCK ROBERT DAVID

IPC: G10K11/178

CPC classification number: H04R1/1083 ,  G10K11/17833 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/1081 ,  G10K2210/3028 ,  G10K2210/3039 ,  G10K2210/503 ,  H04R5/033

Abstract: An adaptive, feed-forward, ambient noise-reduction system includes a reference microphone for generating first electrical signals representing incoming ambient noise, and a connection path including a circuit for inverting these signals and applying them to a loudspeaker directed into the ear of a user. The system also includes an error microphone for generating second electrical signals representative of sound (including that generated by the loudspeaker in response to the inverted first electrical signals) approaching the user's ear. An adaptive electronic filter is provided in the connection path, together with a controller for automatically adjusting one or more characteristics of the filter in response to the first and second electrical signals. The system is configured to constrain the operation of the adaptive filter such that it always conforms to one of a predetermined family of filter responses, thereby restricting the filter to operation within a predetermined and limited set of amplitude and phase characteristics.

Abstract translation: 自适应前馈环境降噪系统包括用于产生表示进入的环境噪声的第一电信号的参考麦克风，以及包括用于反转这些信号的电路的连接路径，并将其应用到定向到用户耳朵的扬声器 。 该系统还包括误差麦克风，用于产生代表用户耳朵的代表声音（包括由扬声器产生的响应于倒置的第一电信号）的第二电信号。 连接路径中提供自适应电子滤波器以及响应于第一和第二电信号自动调整滤波器的一个或多个特性的控制器。 该系统被配置为约束自适应滤波器的操作，使得它总是符合预定的滤波器响应族中的一个，从而将滤波器限制在预定和有限的幅度和相位特性集合内的操作。

公开(公告)号：WO9842161A3

公开(公告)日：1998-12-17

申请号：PCT/GB9800813

申请日：1998-03-18

Applicant: CENTRAL RESEARCH LAB LTD ,  MONTEITH DAVID ,  SIBBALD ALASTAIR ,  TODD MARTIN PETER

Inventor： MONTEITH DAVID ,  SIBBALD ALASTAIR ,  TODD MARTIN PETER

IPC: H04S1/00

CPC classification number: H04S1/00

Abstract: The invention relates to telephonic transmission of 3D sound. Existing video conferencing systems suffer from the disadvantage that following transmission of a person speaking, the speaker's voice tends to become 'disembodied'. That is, if a person moves with respect to a microphone, the reproduced voice tends not to move with the speaker. The invention overcomes or reduces this effect by obtaining left and right monophonic signals, modifying the signals to compensate for head related air-to-ear transfer functions and performing equalisation and cross-talk cancellation on the signals. Eventually signals are compressed to produce a compressed binaural signal for transmission along a telephone link so that frequencies are split into separate bands, but relative phase differences between signals in different frequency bands are preserved. 3D sounds are therefore able to be transmitted via telephone links, and reproduced more effectively, than was previously possible.

公开(公告)号：WO2011061483A3

公开(公告)日：2011-08-11

申请号：PCT/GB2010002108

申请日：2010-11-17

Applicant: INCUS LAB LTD ,  SIBBALD ALASTAIR

Inventor： SIBBALD ALASTAIR

IPC: H04R1/10 ,  G10K11/178

CPC classification number: H04R1/1075 ,  H04R1/1016 ,  H04R2460/01 ,  Y10T29/4957

Abstract: The invention is intended to facilitate the production of ambient noise- cancelling earphones and, to that end, provides a module (30) comprising a microspeaker (34) and an electret microphone (38) both carried on a common substrate (32) which is also configured to incorporate an acoustic resistor (33, 35). The module (30) is incorporated into an earpiece having electrical connections to noise-cancelling electronic circuitry that is provided separately from the earpiece and is housed, for example, in a separate pod (82, 102) or incorporated within the body of a cellular telephone. The performances of the microspeaker (34) and microphone (38) are classified against one or more predetermined operational criteria, enabling the noise-cancelling circuitry to be configured to allow for departures from such criteria. In some embodiments, the module (30) further comprises an information storage device (40) capable of recording data concerning departures from the aforementioned criteria and of providing, upon interrogation, information over the electrical connection to automatically compensate for such departures. The invention also comprises a method of producing ambient noise-cancelling earphones in which the components on the module (30) are classified inter alia by feeding known signals to the microphone (38) and noting the response of the speaker (34) thereto.

Abstract translation: 本发明旨在促进环境噪音消除耳机的生产，并且为此目的，提供一种模块（30），其包括均承载在公共基板（32）上的微型扬声器（34）和驻极体麦克风（38） 还配置成包含声学电阻器（33,35）。 模块（30）被结合到耳机中，该耳机具有与噪音消除电子电路的电连接，所述电子电路独立于耳机提供并且被容纳在例如单独的容器（82,102）中或者被并入蜂窝体 电话。 微型扬声器（34）和麦克风（38）的性能根据一个或多个预定操作标准分类，使得噪声消除电路能够被配置为允许偏离这些标准。 在一些实施例中，模块（30）还包括信息存储装置（40），其能够记录关于偏离前述标准的数据并且在询问时提供关于电连接的信息以自动补偿这种偏离。 本发明还包括一种制造环境噪音消除耳机的方法，其中模块（30）上的部件尤其通过将已知信号馈送到麦克风（38）并注意扬声器（34）对其的响应来分类。

公开(公告)号：WO0178486A3

公开(公告)日：2002-06-06

申请号：PCT/GB0101597

申请日：2001-04-10

Applicant: CENTRAL RESEARCH LAB LTD ,  SIBBALD ALASTAIR

Inventor： SIBBALD ALASTAIR

IPC: G10K15/08 ,  H04M1/19 ,  H04M1/60 ,  H04S5/00 ,  H04S7/00 ,  H04R5/033 ,  H04R3/00

CPC classification number: H04M1/19 ,  G10K15/08 ,  H04M1/6016 ,  H04R2499/11 ,  H04S5/00 ,  H04S7/305

Abstract: A method of audio signal processing for loudspeaker (1) located close to an ear (2), the method consisting of or including creating a reverberant signal from an original monophonic signal, modifying the spectral characteristics of the original signal using a first pinna transfer function, modifying the spectral characteristics of the reverberant signal using a further pinna transfer function, combining the modified reverberant signal and the modified original signal to form a combined signal, and feeding the combined signal to said loudspeaker, thereby providing cues for enabling the listener to perceive the source of the sound of the original audio signal to be located remote from said ear. The method is particularly advantageous for use in communications apparatus such as telephones or radio transceivers.

Abstract translation: 一种用于靠近耳朵（2）定位的扬声器（1）的音频信号处理方法，该方法包括或包括从原始单声道信号产生混响信号，使用第一针刺传递函数修改原始信号的频谱特性 ，使用另外的针刺传递函数来修改混响信号的频谱特性，组合改进的混响信号和修改的原始信号以形成组合信号，并将组合信号馈送到所述扬声器，由此提供线索以使听众能够察觉 原始音频信号的声音源将位于远离所述耳朵的位置。 该方法特别有利于在诸如电话或无线电收发机的通信设备中使用。

公开(公告)号：WO9827768A2

公开(公告)日：1998-06-25

申请号：PCT/GB9703440

申请日：1997-12-15

Applicant: CENTRAL RESEARCH LAB LTD ,  SIBBALD ALASTAIR ,  TODD MARTIN PETER

Inventor： SIBBALD ALASTAIR ,  TODD MARTIN PETER

IPC: H04W12/00 ,  H04Q7/32 ,  H04Q7/22

CPC classification number: H04M1/68 ,  H04K1/10 ,  H04L63/126 ,  H04M1/727 ,  H04W12/10

Abstract: The invention is a method of making a mobile telephone more secure and includes generating an identification code, inserting the code into transmitted speech, detecting the code at a base station and comparing it with stored information to verify the authenticity of the mobile telephone. The identification code comprises two portions: the first portion (which stores the code) being produced during manufacture of a chip and the second portion being formed by a randomised process during commissioning of the telephone. The invention overcomes problems associated with similar, prior art systems because the chip containing the identification code has part of its code randomly selected because it is an irreversible process.

Abstract translation: 本发明是一种使移动电话更安全的方法，包括生成识别码，将码插入发送的语音中，检测基站的码，并与存储的信息进行比较，以验证移动电话的真实性。 识别码包括两部分：芯片制造期间产生的第一部分（存储代码），第二部分是在调试电话期间通过随机化处理形成的。 本发明克服了与类似的现有技术系统相关的问题，因为包含识别码的芯片由于是不可逆的过程而随机选择了其代码的一部分。

公开(公告)号：WO2007088332A2

公开(公告)日：2007-08-09

申请号：PCT/GB2007000284

申请日：2007-01-26

Applicant: SONAPTIC LTD ,  CLEMOW RICHARD DAVID ,  SIBBALD ALASTAIR ,  ALCOCK ROBERT DAVID

Inventor： CLEMOW RICHARD DAVID ,  SIBBALD ALASTAIR ,  ALCOCK ROBERT DAVID

CPC classification number: H04M19/04 ,  G06F9/4443 ,  G06F9/542 ,  G06F2209/545 ,  H04M1/72544 ,  H04M1/72569 ,  H04M1/72572 ,  H04M1/72597

Abstract: A mobile electronic device is programmed so that when the device is running a an application and an event occurs that the device needs to notify the user about, then the device alters the visual and/or sonic behaviour of the application according to, a pre- defined event notification profile. The user can select a desired event notification profile from a menu of available profiles stored in the device. For example, the event notification profile could be graphics and/or audio in the application gently fading to an alternative state using a pre-defined transition effect.

Abstract translation: 移动电子设备被编程，使得当设备正在运行应用程序并且发生设备需要通知用户的事件时，设备根据预先设定的方式更改应用程序的视觉和/或声音行为， 定义的事件通知配置文件。 用户可以从存储在设备中的可用简档的菜单中选择期望的事件通知简档。 例如，事件通知简档可以是应用中的图形和/或音频，使用预定义的转换效果轻轻地衰落到替代状态。

公开(公告)号：WO0225999A2

公开(公告)日：2002-03-28

申请号：PCT/GB0104055

申请日：2001-09-10

Applicant: CENTRAL RESEARCH LAB LTD ,  SIBBALD ALASTAIR

Inventor： SIBBALD ALASTAIR

IPC: H04R5/033 ,  H04S1/00 ,  H04S7/00 ,  H04S

CPC classification number: H04S7/305 ,  H04S1/005 ,  H04S2420/01

Abstract: A method of audio signal processing for a loudspeaker located close to an ear in use, the method consisting of or including: creating one or more derived signal from an original monophonic input signal, the derived signals being representative of the original signal being scattered by one or more bodies remote from said ear (excluding room boundary reflection or reverberation), combining the derived signal or signals with said input signal to form a combined signal, and feeding the combined signal to said loudspeaker, thereby providing cues for enabling the listener to perceive the source of the sound of the original monophonic input signal to be located remote from said ear.

Abstract translation: 一种用于在使用中靠近耳朵的扬声器的音频信号处理方法，所述方法包括或包括：从原始单声道输入信号产生一个或多个导出信号，所述导出信号代表原始信号被一个 或更多的远离所述耳朵的物体（不包括房间边界反射或混响），将导出的信号或信号与所述输入信号组合以形成组合信号，并将组合的信号馈送到所述扬声器，由此提供线索以使听众能够察觉 原始单声道输入信号的声音源将位于远离所述耳朵的位置。

公开(公告)号：WO0119138A3

公开(公告)日：2001-11-15

申请号：PCT/GB0003393

申请日：2000-09-04

Applicant: CENTRAL RESEARCH LAB LTD ,  PERCY MICHAEL ,  SIBBALD ALASTAIR

Inventor： PERCY MICHAEL ,  SIBBALD ALASTAIR

IPC: H04S5/00 ,  H04S1/00 ,  G10K15/12

CPC classification number: H04S5/00

Abstract: A method of generating a second decorrelated audio signal from a first audio signal, for use in synthesising a 3D sound field, includes: a) deriving from the first signal a first delayed signal; b) multiplying this first delayed signal by a gain factor between zero and minus one to give a first delayed gain-adjusted signal; c) deriving from the first audio signal a second delayed signal, having a different delay time from the first delayed signal; d) multiplying this second delayed signal by a gain factor between zero and plus one (such that the said gain factors sum to zero) to give a second delayed gain-adjusted signal; e) combining said first and said second delayed gain-adjusted signals with the first audio signal to provide a second decorrelated audio signal. The first and second delayed signals are delayed by time periods which change in a substantially random manner.

Abstract translation: 一种从第一音频信号生成用于合成3D声场的第二去相关音频信号的方法包括：a）从第一信号中导出第一延迟信号; b）将该第一延迟信号乘以零与负1之间的增益因子以给出第一延迟增益调整信号; c）从第一音频信号导出具有与第一延迟信号不同的延迟时间的第二延迟信号; d）将该第二延迟信号乘以零与加1之间的增益因子（使得所述增益因子加到零），以产生第二延迟增益调整信号; e）将所述第一和第二延迟增益调整信号与第一音频信号组合以提供第二解相关音频信号。 第一和第二延迟信号被以基本随机的方式改变的时间段延迟。