DETECTION AND SUPPRESSION OF WIND NOISE IN MICROPHONE SIGNALS
    83.
    发明申请
    DETECTION AND SUPPRESSION OF WIND NOISE IN MICROPHONE SIGNALS 有权
    麦克风信号中风噪声的检测和抑制

    公开(公告)号:US20080226098A1

    公开(公告)日:2008-09-18

    申请号:US11925323

    申请日:2007-10-26

    IPC分类号: H04B15/00

    摘要: To reliably and consistently detect desirable sounds, a system detects the presence of wind noise based on the power levels of audio signals. A first transducer detects sound originating from a first direction and a second transducer detects sound originating from a second direction. The power levels of the sound are compared. When the power level of the sound received from the second transducer is less than the power level of the sound received from the first transducer by a predetermined value, wind noise may be present. A signal processor may generate an output from one or a combination of the audio signals, based on a wind noise detection.

    摘要翻译: 为了可靠和一致地检测所需声音,系统基于音频信号的功率电平来检测风噪声的存在。 第一换能器检测源于第一方向的声音,第二换能器检测来自第二方向的声音。 比较声音的功率级别。 当从第二换能器接收的声音的功率水平小于从第一换能器接收的声音的功率水平预定值时,可能存在风噪声。 信号处理器可以基于风噪声检测从一个音频信号或其组合生成输出。

    VOICE COMMAND PROCESSING SYSTEM IN A VEHICLE ENVIRONMENT
    84.
    发明申请
    VOICE COMMAND PROCESSING SYSTEM IN A VEHICLE ENVIRONMENT 审中-公开
    车辆环境中的语音指令处理系统

    公开(公告)号:US20080154613A1

    公开(公告)日:2008-06-26

    申请号:US11834591

    申请日:2007-08-06

    IPC分类号: G10L11/00

    CPC分类号: B60R25/257

    摘要: A voice processing system for a vehicle environment is provided for detecting a sound signal in the vehicle environment and identifying a voice command that originates from a vehicle user outside the vehicle. The voice processing system, in the detected the sound signal, takes into account position information relating to the position of the vehicle user in the vehicle environment. Information on the position of the vehicle user may be obtained from a keyless-go-system or another monitoring device of the motor vehicle, for example an optical imaging device of a parking-assistance system or a driver-assistance system.

    摘要翻译: 提供了一种用于车辆环境的语音处理系统,用于检测车辆环境中的声音信号,并且识别来自车辆外的车辆用户的语音命令。 在检测到声音信号中的语音处理系统考虑与车辆用户在车辆环境中的位置有关的位置信息。 关于车辆用户的位置的信息可以从机动车辆的无钥匙系统或其他监视装置,例如停车辅助系统的光学成像装置或驾驶员辅助系统获得。

    LOW COMPLEXITY ECHO COMPENSATION SYSTEM
    85.
    发明申请
    LOW COMPLEXITY ECHO COMPENSATION SYSTEM 有权
    低复杂度ECHO补偿系统

    公开(公告)号:US20080144848A1

    公开(公告)日:2008-06-19

    申请号:US11955862

    申请日:2007-12-13

    IPC分类号: H04B3/20

    CPC分类号: H04M9/082

    摘要: An echo reduction system includes a signal analysis filter that converts an input into sub-band signals. A signal down-sampling circuit down-samples the sub-band signals at a first down-sampling rate. An echo analysis filter converts a loudspeaker signal into echo sub-band signal that are further processed by an echo down-sampling circuit. The circuit down-samples the echo sub-band signals at a second down-sampling rate to generate down-sampled echo sub-band signals. An echo compensation filter folds the down-sampled echo sub-band signals with an estimated impulse response of a loudspeaker-room-input system. A second echo down-sampling circuit down-samples the folded down-sampled echo sub-band signals at a third down-sampling rate to generate estimated echo sub-band signals. The first down-sampling rate is equal to the product of the second and third down-sampling rates.

    摘要翻译: 回波减少系统包括将输入转换为子带信号的信号分析滤波器。 信号下采样电路以第一下采样率对子带信号进行下采样。 回波分析滤波器将扬声器信号转换成由回波下采样电路进一步处理的回波子带信号。 电路以第二次下采样率对回波子带信号进行下采样以产生下采样的回波子带信号。 回波补偿滤波器用扬声器室输入系统的估计的脉冲响应折叠下采样的回波子带信号。 第二回波下采样电路以三次下采样率对折叠的下采样回波子带信号进行下采样,以产生估计的回波子带信号。 第一个下采样率等于第二次和第三次下采样率的乘积。

    System for automatic recognition of vehicle operating noises
    86.
    发明申请
    System for automatic recognition of vehicle operating noises 审中-公开
    自动识别车辆运行噪声的系统

    公开(公告)号:US20060253282A1

    公开(公告)日:2006-11-09

    申请号:US11376001

    申请日:2006-03-14

    IPC分类号: G10L15/20

    CPC分类号: G07C5/0808

    摘要: A system automatically recognizes a vehicle operating condition through a microphone positioned within the vehicle. The microphone detects acoustic signals. A database stores speech templates and operating noise templates. A feature extracting module receives microphone signals and extracts a set of operating noise feature parameters or speech feature parameters from the microphone signals. A speech and noise recognition module may determine an operating noise template that best matches a set of extracted operating noise feature parameters and/or a speech template. The speech template best matches the set of extracted speech feature parameters.

    摘要翻译: 系统通过位于车辆内的麦克风自动识别车辆操作状态。 麦克风检测声信号。 数据库存储语音模板和操作噪声模板。 特征提取模块从麦克风信号接收麦克风信号并提取一组操作噪声特征参数或语音特征参数。 语音和噪声识别模块可以确定与提取的操作噪声特征参数和/或语音模板的一组最佳匹配的操作噪声模板。 语音模板最适合提取的语音特征参数集合。

    Microphone non-uniformity compensation system
    87.
    发明申请
    Microphone non-uniformity compensation system 有权
    麦克风不均匀补偿系统

    公开(公告)号:US20060147054A1

    公开(公告)日:2006-07-06

    申请号:US11271503

    申请日:2005-11-12

    IPC分类号: H04R3/00 H04R1/02

    CPC分类号: H04R3/005 H04R2430/25

    摘要: A microphone compensation system responds to changes in the characteristics of individual microphones in an array of microphones. The microphone compensation system provides a communication system with consistent performance despite microphone aging, widely varying environmental conditions, and other factors that alter the characteristics of the microphones. Furthermore, lengthy, complex, and costly measurement and analysis phases for determining initial settings for filters in the communication system are eliminated.

    摘要翻译: 麦克风补偿系统可以响应麦克风阵列中各个麦克风的特性变化。 麦克风补偿系统提供了具有一致性能的通信系统,尽管麦克风老化,广泛变化的环境条件以及改变麦克风特性的其它因素。 此外,消除了用于确定通信系统中的滤波器的初始设置的冗长,复杂且昂贵的测量和分析阶段。