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公开(公告)号：US20180268798A1
公开(公告)日：2018-09-20
申请号：US15922848
申请日：2018-03-15
CPC分类号： G10K11/16 , G10K11/1785 , G10K11/17885 , G10K2210/1081 , G10K2210/3025 , G10K2210/3028 , G10K2210/3035 , G10K2210/3056 , G10L21/0232 , G10L25/78 , G10L2021/02165 , H04M1/6058 , H04R1/08 , H04R1/1083 , H04R3/005 , H04R3/04 , H04R2201/107 , H04R2410/05 , H04R2430/03
摘要： Systems and methods for enhancing a headset user's own voice include an outside microphone, an inside microphone, audio input components operable to receive a plurality of time-domain microphone signals, including an outside microphone signal from the outside microphone and an inside microphone signal from the inside microphone, a subband decomposition module operable to transform the time-domain microphone signals to frequency domain subband signals, a voice activity detector operable to detect speech presence and absence in the subband signals, a speech extraction module operable to predict a clean speech signal in each of the inside microphone signal and the outside microphone signal, and cancel audio sources other than a headset user's own voice by combining the predicted clean speech signal from the inside microphone signal and the predicted clean speech signal from the outside microphone signal, and a postfiltering module operable to reduce residual noise.
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公开(公告)号：US10679617B2
公开(公告)日：2020-06-09
申请号：US15833977
申请日：2017-12-06
IPC分类号： G10L21/00 , G10L15/20 , G10L15/22 , G10L21/038 , G10L25/84 , H04R3/00 , G10L21/0232 , G10L25/21 , H04R27/00 , H04R1/40 , G10L25/78 , H04R5/04 , G10L21/0216 , H04R5/02
摘要： A real-time audio signal processing system includes an audio signal processor configured to process audio signals using a modified generalized eigenvalue (GEV) beamforming technique to generate an enhanced target audio output signal. The digital signal processor includes a sub-band decomposition circuitry configured to decompose the audio signal into sub-band frames in the frequency domain and a target activity detector configured to detect whether a target audio is present in the sub-band frames. Based on information related to the sub-band frames and the determination of whether the target audio is present in the sub-band frames, the digital signal processor is configured to use the modified GEV technique to estimate the relative transfer function (RTF) of the target audio source, and generate a filter based on the estimated RTF. The filter may then be applied to the audio signals to generate the enhanced audio output signal.
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公开(公告)号：US20190172450A1
公开(公告)日：2019-06-06
申请号：US15833977
申请日：2017-12-06
IPC分类号： G10L15/20 , G10L15/22 , G10L21/038 , G10L25/84 , G10L25/21 , G10L21/0232
摘要： A real-time audio signal processing system includes an audio signal processor configured to process audio signals using a modified generalized eigenvalue (GEV) beamforming technique to generate an enhanced target audio output signal. The digital signal processor includes a sub-band decomposition circuitry configured to decompose the audio signal into sub-band frames in the frequency domain and a target activity detector configured to detect whether a target audio is present in the sub-band frames. Based on information related to the sub-band frames and the determination of whether the target audio is present in the sub-band frames, the digital signal processor is configured to use the modified GEV technique to estimate the relative transfer function (RTF) of the target audio source, and generate a filter based on the estimated RTF. The filter may then be applied to the audio signals to generate the enhanced audio output signal.
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