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    • 2. 发明申请
    • SYSTEMS, METHODS, AND APPARATUS FOR DIRECTING SOUND IN A VEHICLE
    • 用于指挥车辆声音的系统,方法和装置
    • US20140294210A1
    • 2014-10-02
    • US13977572
    • 2011-12-29
    • Jennifer HealeyDavid L. Graumann
    • Jennifer HealeyDavid L. Graumann
    • H04S7/00
    • H04S7/303H04R3/12H04R27/00H04R2499/13
    • Certain embodiments of the invention may include systems, methods, and apparatus for directing sound in a vehicle. According to an example embodiment of the invention, a method is provided for steering sound within a vehicle. The method includes receiving one or more images from at least one camera attached to the vehicle; locating, from the one or more images, one or more body features associated with one or more occupants of the vehicle; generating at least one signal for controlling one or more sound transducers; and routing, based at least on the locating, the one or more generated signals to the one or more sound transducers for directing sound waves to at least one of the one or more body features.
    • 本发明的某些实施例可以包括用于在车辆中引导声音的系统,方法和装置。 根据本发明的示例性实施例,提供了一种用于在车辆内转向声音的方法。 所述方法包括从附接到所述车辆的至少一个照相机接收一个或多个图像; 从一个或多个图像定位与车辆的一个或多个乘员相关联的一个或多个身体特征; 产生用于控制一个或多个声音换能器的至少一个信号; 以及至少基于所述定位将所述一个或多个生成的信号路由到所述一个或多个声音换能器,用于将声波引导到所述一个或多个身体特征中的至少一个。
    • 6. 发明授权
    • Adjustment of temporal acoustical characteristics
    • 时间声学特性的调整
    • US08447609B2
    • 2013-05-21
    • US12347977
    • 2008-12-31
    • Giuseppe RaffaLama NachmanDavid L. GraumannMichael E. Deisher
    • Giuseppe RaffaLama NachmanDavid L. GraumannMichael E. Deisher
    • G10L13/00G10L13/08
    • G06F17/2775G10L13/00
    • Embodiments may be a standalone module or part of mobile devices, desktop computers, servers, stereo systems, or any other systems that might benefit from condensed audio presentations of item structures such as lists or tables. Embodiments may comprise logic such as hardware and/or code to adjust the temporal characteristics of items comprising words. The items maybe included in a structure such as a text listing or table, an audio listing or table, or a combination thereof, or may be individual words or phrases. For instance, embodiments may comprise a keyword extractor to extract keywords from the items and an abbreviations generator to generate abbreviations based upon the keywords. Further embodiments may comprise a text-to-speech generator to generate audible items based upon the abbreviations to render to a user while traversing the item structure.
    • 实施例可以是独立模块或移动设备,台式计算机,服务器,立体声系统或可能受益于诸如列表或表的项目结构的聚合音频呈现的任何其他系统的独立模块或部分。 实施例可以包括诸如硬件和/或代码的逻辑,以调整包括单词的项目的时间特征。 项目可以包括在诸如文本列表或表格,音频列表或表格或其组合的结构中,或者可以是单独的单词或短语。 例如,实施例可以包括从项目中提取关键词的关键字提取器和缩写生成器,以基于关键字生成缩写。 另外的实施例可以包括文本到语音生成器,以便在遍历项目结构的同时基于缩写来生成可听见的项目以呈现给用户。
    • 9. 发明授权
    • Automatic microphone calibration for video teleconferencing
    • 视频电话会议的自动麦克风校准
    • US5844994A
    • 1998-12-01
    • US520032
    • 1995-08-28
    • David L. Graumann
    • David L. Graumann
    • H04N7/15H04R29/00
    • H04R29/004H04N7/15
    • A method of automatically calibrating a microphone having a microphone input gain comprises the steps of receiving an input signal generated by the microphone in response to an audio input, sampling the input signal to produce a plurality of samples, detecting a plurality of instances of voice energy in the samples, creating a power density function (PDF) from the detected instances of voice energy, wherein the acquired signal level differs from a predefined voice reference level by an offset amount, and adjusting the value of the input gain so that the acquired signal level equals the predefined voice reference level. The step of detecting a plurality of instances of voice energy comprises the step of generating a noise floor by creating a noise power density function (NPDF) from the samples. The NPDF is based on a relationship between an approximate peak power level of the signal and a current power level of the signal and based on a plurality of standard deviation values of the signal, each of the standard deviation values corresponding to one of a plurality of time intervals. The NPDF is repeatedly updated to produce a current state of the NPDF to update the noise floor. If a predetermined relationship exists between the current power level of the audio signal and the updated noise floor, an instance of voice energy is detected.
    • 一种自动校准具有麦克风输入增益的麦克风的方法包括以下步骤:响应于音频输入接收由麦克风产生的输入信号,对输入信号进行采样以产生多个样本,检测多个语音能量的实例 在样本中,从检测到的语音能量的实例创建功率密度函数(PDF),其中所获取的信号电平与预定义的语音参考电平相差偏移量,并且调整输入增益的值,使得获取的信号 电平等于预定义的语音参考电平。 检测语音能量的多个实例的步骤包括通过从样本产生噪声功率密度函数(NPDF)来产生噪声本底的步骤。 NPDF基于信号的近似峰值功率电平与信号的当前功率电平之间的关系,并且基于信号的多个标准偏差值,每个标准偏差值对应于多个 时间间隔。 NPDF被重复更新以产生NPDF的当前状态,以更新本底噪声。 如果在音频信号的当前功率电平和更新的噪声本底之间存在预定的关系,则检测到语音能量的一个实例。