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    • 85. 发明申请
    • NOISE ADAPTIVE BEAMFORMING FOR MICROPHONE ARRAYS
    • 用于麦克风阵列的噪声自适应波束形成
    • WO2012119100A2
    • 2012-09-07
    • PCT/US2012/027540
    • 2012-03-02
    • MICROSOFT CORPORATION
    • KIKKERI, Harshavardhana N.
    • G10L21/02
    • H04R3/005G10L21/0216G10L2021/02166G10L2021/02168
    • The subject disclosure is directed towards a noise adaptive beamformer that dynamically selects between microphone array channels, based upon noise energy floor levels that are measured when no actual signal (e.g., no speech) is present. When speech (or a similar desired signal) is detected, the beamformer selects which microphone signal to use in signal processing, e.g., corresponding to the lowest noise channel. Multiple channels may be selected, with their signals combined. The beamformer transitions back to the noise measurement phase when the actual signal is no longer detected, so that the beamformer dynamically adapts as noise levels change, including on a per-microphone basis, to account for microphone hardware differences, changing noise sources, and individual microphone deterioration.
    • 本发明涉及一种噪声自适应波束形成器,其基于当不存在实际信号(例如,无语音)时所测量的噪声能量底层电平,在麦克风阵列信道之间动态选择。 当检测到语音(或类似的期望信号)时,波束形成器选择在信号处理中使用哪个麦克风信号,例如对应于最低噪声信道。 可以选择多个信道,其信号组合。 当不再检测到实际信号时,波束形成器转换回到噪声测量阶段,使得波束形成器随着噪声电平的变化而动态地适应,包括基于每麦克风的麦克风硬件差异,改变噪声源和个体 麦克风恶化。
    • 86. 发明申请
    • POST-PROCESSING INCLUDING MEDIAN FILTERING OF NOISE SUPPRESSION GAINS
    • 后处理,包括噪声抑制增益中值滤波
    • WO2012109385A1
    • 2012-08-16
    • PCT/US2012/024372
    • 2012-02-08
    • DOLBY LABORATORIES LICENSING CORPORATIONDICKINS, Glenn N.
    • DICKINS, Glenn N.
    • G10L21/02
    • G10L21/0208G10L2021/02166
    • A method of post-processing banded gains for applying to an audio signal, an apparatus to banded post-processed gains, and a tangible computer-readable storage medium comprising instructions that when executed carry out the method. The banded gains are determined by input processing one or more input audio signals. The method includes post-processing the banded gains to generate banded post-processed gains, generating a particular post-processed gain for a particular frequency band, including median filtering using gain values from gain values for frequency bands adjacent to the particular frequency band. One or more properties of the post-processing depends on classification of the one or more input audio signals.
    • 一种后处理用于应用于音频信号的带状增益的方法,用于带状后处理增益的装置以及包括当被执行时执行该方法的指令的有形计算机可读存储介质的方法。 带状增益由输入处理一个或多个输入音频信号确定。 该方法包括后处理带状增益以产生带状后处理增益,为特定频带生成特定的后处理增益,包括使用与特定频带相邻的频带的增益值的增益值的中值滤波。 后处理的一个或多个属性取决于一个或多个输入音频信号的分类。