公开(公告)号：US11721316B2

公开(公告)日：2023-08-08

申请号：US17723164

申请日：2022-04-18

申请人： SteadyBeat Technology Corp.

发明人： Hao Ming Chen ,  Ju Chieh Liu

IPC分类号： G10K11/178

CPC分类号： G10K11/17879 ,  G10K11/17854 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3028

摘要： A low-delay hybrid noise reduction system includes a reference audio receiving device, an error audio receiving device, an audio output device, and an audio processing device. The audio processing device includes a feedforward noise reduction filter module, a feedback noise reduction filter module, and a mixer. The feedforward noise reduction filter module includes a feedforward least mean squares (LMS) filter, a low-stage finite impulse response (FIR) filter, and 1st to Nth-stage biquad filters. The 1st to Nth-stage biquad filters is set on the input end of the low-stage finite impulse response filter to perform low-delay filtering on the reference source audio signal received and outputs to the low-stage FIR filter so as to output the feedforward noise reduction signal through the low-stage FIR filter.

公开(公告)号：US11699424B2

公开(公告)日：2023-07-11

申请号：US17677387

申请日：2022-02-22

申请人： SteadyBeat Technology Corp.

发明人： Hao-Ming Chen

IPC分类号： G10K11/178

CPC分类号： G10K11/17817 ,  G10K11/17854

摘要： The present invention provides an improved noise separation hybrid type ANC system, which includes a reference audio receiving device, an error audio receiving device, an audio output device, and an audio processing device. The audio processing device includes a feed-forward noise cancellation filter module, a feedback noise cancellation filter module, a mixer, a noise shaper, a first infinite impulse response filter, and a second infinite impulse response filter. When the noise bandwidth detector detects irregular noise, it adjusts the coefficient of the first infinite impulse response filter to set it as a low-pass filter; when regular noise is detected, the coefficient of the second infinite impulse response filter is adjusted to set it as a band-pass filter.

公开(公告)号：US20230178064A1

公开(公告)日：2023-06-08

申请号：US17723164

申请日：2022-04-18

申请人： SteadyBeat Technology Corp.

发明人： HAO MING CHEN ,  JU CHIEH LIU

IPC分类号： G10K11/178

CPC分类号： G10K11/17879 ,  G10K11/17854 ,  G10K2210/3028 ,  G10K2210/3027 ,  G10K2210/3026

摘要： A low-delay hybrid noise reduction system includes a reference audio receiving device, an error audio receiving device, an audio output device, and an audio processing device. The audio processing device includes a feedforward noise reduction filter module, a feedback noise reduction filter module, and a mixer. The feedforward noise reduction filter module includes a feedforward least mean squares (LMS) filter, a low-stage finite impulse response (FIR) filter, and 1st to Nth-stage biquad filters. The 1st to Nth-stage biquad filters is set on the input end of the low-stage finite impulse response filter to perform low-delay filtering on the reference source audio signal received and outputs to the low-stage FIR filter so as to output the feedforward noise reduction signal through the low-stage FIR filter.

公开(公告)号：US20220277722A1

公开(公告)日：2022-09-01

申请号：US17677387

申请日：2022-02-22

申请人： SteadyBeat Technology Corp.

发明人： HAO-MING CHEN

IPC分类号： G10K11/178

摘要： The present invention provides an improved noise separation hybrid type ANC system, which includes a reference audio receiving device, an error audio receiving device, an audio output device, and an audio processing device. The audio processing device includes a feed-forward noise cancellation filter module, a feedback noise cancellation filter module, a mixer, a noise shaper, a first infinite impulse response filter, and a second infinite impulse response filter. When the noise bandwidth detector detects irregular noise, it adjusts the coefficient of the first infinite impulse response filter to set it as a low-pass filter; when regular noise is detected, the coefficient of the second infinite impulse response filter is adjusted to set it as a band-pass filter.