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    • 1. 发明申请
    • Audio system based on at least second-order eigenbeams
    • 基于至少二阶本征束的音响系统
    • US20050123149A1
    • 2005-06-09
    • US10500938
    • 2003-01-10
    • Gary ElkoRobert KubliJens Meyer
    • Gary ElkoRobert KubliJens Meyer
    • H04R1/02H04R1/40H04R3/00
    • H04R5/027H04R3/005H04R2201/401H04S3/00H04S2400/15
    • A microphone array-based audio system that supports representations of auditory scenes using second-order (or higher) harmonic expansions based on the audio signals generated by the microphone array. In one embodiment, a plurality of audio sensors are mounted on the surface of an acoustically rigid sphere. The number and location of the audio sensors on the sphere are designed to enable the audio signals generated by those sensors to be decomposed into a set of eigenbeams having at least one eigenbeam of order two (or higher). Beamforming (e.g., steering, weighting, and summing) can then be applied to the resulting eigenbeam outputs to generate one or more channels of audio signals that can be utilized to accurately render an auditory scene. Alternative embodiments include using shapes other than spheres, using acoustically soft spheres and/or positioning audio sensors in two or more concentric patterns.
    • 基于麦克风阵列的音频系统,其基于由麦克风阵列产生的音频信号,支持使用二阶(或更高)谐波扩展的听觉场景的表示。 在一个实施例中,多个音频传感器安装在声学刚性球体的表面上。 球体上的音频传感器的数量和位置被设计成使得由这些传感器产生的音频信号能够分解成具有至少一个二阶(或更高)的本征光束的一组本征束。 然后可以将波束形成(例如,导向,加权和求和)应用于所产生的本征波束输出以产生可用于准确地渲染听觉场景的一个或多个音频信号通道。 替代实施例包括使用球形以外的形状,使用声软球和/或以两个或多个同心图案定位音频传感器。