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公开(公告)号：US20100061564A1
公开(公告)日：2010-03-11
申请号：US12525889
申请日：2008-02-06
IPC分类号： G10K11/16
CPC分类号： H04R1/1083 , G10K11/17833 , G10K11/17881 , G10K11/17885 , G10K2210/1081 , G10K2210/3028 , G10K2210/3039 , G10K2210/503 , H04R5/033
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US08737633B2
公开(公告)日：2014-05-27
申请号：US12808616
申请日：2008-12-11
IPC分类号： G10K11/178
CPC分类号： G10K11/178 , G10K2210/1081 , G10K2210/3056
摘要： A noise cancellation system is provided, for generating a noise cancellation signal to be added to a wanted signal to mitigate the effects of ambient noise. The system comprises: an input, for receiving an input signal representing ambient noise; a detector, for detecting a magnitude of said input signal; and a voice activity detector, for determining voiceless periods when said input signal does not contain a signal representing a voice. The detector is adapted to detect the magnitude of said input signal during said voiceless periods, and the system is adapted to operate in a first mode when said input signal is above a threshold value, and a second mode when said input signal is below the threshold value. The first mode comprises generating a noise cancellation signal with a first magnitude for at least partially cancelling the ambient noise. The second mode comprises generating a noise cancellation signal with a second magnitude that is less than the first magnitude.
摘要翻译： 提供了一种噪声消除系统，用于产生要添加到所需信号的噪声消除信号以减轻环境噪声的影响。 该系统包括：用于接收表示环境噪声的输入信号的输入; 检测器，用于检测所述输入信号的大小; 以及语音活动检测器，用于当所述输入信号不包含表示语音的信号时确定无声时段。 所述检测器适于在所述无声周期期间检测所述输入信号的幅度，并且当所述输入信号高于阈值时，所述系统适于在第一模式下工作;以及当所述输入信号低于阈值时，所述系统适于在第一模式下操作 值。 第一模式包括产生具有第一量值的噪声消除信号以至少部分地消除环境噪声。 第二模式包括产生具有小于第一量值的第二量值的噪声消除信号。
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公开(公告)号：US20100266137A1
公开(公告)日：2010-10-21
申请号：US12808616
申请日：2008-12-11
CPC分类号： G10K11/178 , G10K2210/1081 , G10K2210/3056
摘要： A noise cancellation system is provided, for generating a noise cancellation signal to be added to a wanted signal to mitigate the effects of ambient noise. The system comprises: an input, for receiving an input signal representing ambient noise; a detector, for detecting a magnitude of said input signal; and a voice activity detector, for determining voiceless periods when said input signal does not contain a signal representing a voice. The detector is adapted to detect the magnitude of said input signal during said voiceless periods, and the system is adapted to operate in a first mode when said input signal is above a threshold value, and a second mode when said input signal is below the threshold value. The first mode comprises generating a noise cancellation signal with a first magnitude for at least partially cancelling the ambient noise. The second mode comprises generating a noise cancellation signal with a second magnitude that is less than the first magnitude.
摘要翻译： 提供了一种噪声消除系统，用于产生要添加到所需信号的噪声消除信号以减轻环境噪声的影响。 该系统包括：用于接收表示环境噪声的输入信号的输入; 检测器，用于检测所述输入信号的大小; 以及语音活动检测器，用于当所述输入信号不包含表示语音的信号时确定无声时段。 所述检测器适于在所述无声周期期间检测所述输入信号的幅度，并且当所述输入信号高于阈值时，所述系统适于在第一模式下工作;以及当所述输入信号低于阈值时，所述系统适于在第一模式下操作 值。 第一模式包括产生具有第一量值的噪声消除信号以至少部分地消除环境噪声。 第二模式包括产生具有小于第一量值的第二量值的噪声消除信号。
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公开(公告)号：US20090029681A1
公开(公告)日：2009-01-29
申请号：US12161952
申请日：2007-01-26
CPC分类号： H04M19/04 , G06F9/451 , G06F9/542 , G06F2209/545 , H04M1/72544 , H04M1/72569 , H04M1/72572 , H04M1/72597
摘要： 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.
摘要翻译： 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所需的事件通知简档。 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。
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