公开(公告)号：US07912567B2

公开(公告)日：2011-03-22

申请号：US11714746

申请日：2007-03-07

申请人： Harprit Singh Chhatwal ,  Hui Li ,  Andrew Linkens ,  Mark Smith

发明人： Harprit Singh Chhatwal ,  Hui Li ,  Andrew Linkens ,  Mark Smith

IPC分类号： G06F17/00

CPC分类号： G10L21/0208 ,  G10L2021/02168

摘要： A method of determining noise in an audio stream, the method comprising: acquiring a plurality of consecutive time frames of the audio stream each comprising samples of the audio stream; generating a discrete frequency spectrum for each frame responsive to the frame samples; partitioning the frequency spectrum of each frame into a plurality of same frequency bands; determining an audio energy for each frequency band in each frame; and determining an estimate of noise energy for each frequency band in a temporally last time frame responsive to a relatively small number of smallest values for the audio energy in the frequency band of the plurality of time frames.

摘要翻译： 一种确定音频流中的噪声的方法，所述方法包括：获取音频流的多个连续时间帧，每个音频流包括音频流的采样; 响应于帧样本为每个帧生成离散频谱; 将每个帧的频谱划分成多个相同的频带; 确定每帧中每个频带的音频能量; 以及响应于所述多个时间帧中的频带中的音频能量的相对较小数量的最小值，在时间上最后一帧中确定每个频带的噪声能量的估计。

公开(公告)号：US20080219472A1

公开(公告)日：2008-09-11

申请号：US11714746

申请日：2007-03-07

申请人： Harprit Singh Chhatwal ,  Hui Ll ,  Andrew Linkens ,  Mark Smith

发明人： Harprit Singh Chhatwal ,  Hui Ll ,  Andrew Linkens ,  Mark Smith

IPC分类号： H04B15/00

CPC分类号： G10L21/0208 ,  G10L2021/02168

摘要： A method of determining noise in an audio stream, the method comprising: acquiring a plurality of consecutive time frames of the audio stream each comprising samples of the audio stream; generating a discrete frequency spectrum for each frame responsive to the frame samples; partitioning the frequency spectrum of each frame into a plurality of same frequency bands; determining an audio energy for each frequency band in each frame; and determining an estimate of noise energy for each frequency band in a temporally last time frame responsive to a relatively small number of smallest values for the audio energy in the frequency band of the plurality of time frames.

摘要翻译： 一种确定音频流中的噪声的方法，所述方法包括：获取音频流的多个连续时间帧，每个音频流包括音频流的采样; 响应于帧样本为每个帧生成离散频谱; 将每个帧的频谱划分成多个相同的频带; 确定每帧中每个频带的音频能量; 以及响应于所述多个时间帧中的频带中的音频能量的相对较小数量的最小值，在时间上最后一帧中确定每个频带的噪声能量的估计。