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1. 发明公开

EP4035153A1 SYSTEMS AND METHODS FOR NOISE CONTROL 审中-实审
公开(公告)号：EP4035153A1
公开(公告)日：2022-08-03
申请号：EP19955436.1
申请日：2019-12-12
申请人： Shenzhen Shokz Co., Ltd.
发明人： ZHANG, Chengqian , LIAO, Fengyun , QI, Xin
IPC分类号： G10L21/02

2. 发明公开

EP4325885A1 ACOUSTIC APPARATUS AND TRANSFER FUNCTION DETERMINATION METHOD THEREFOR 审中-实审
公开(公告)号：EP4325885A1
公开(公告)日：2024-02-21
申请号：EP22894118.3
申请日：2022-03-03
申请人： Shenzhen Shokz Co., Ltd.
发明人： ZHENG, Jinbo , ZHANG, Chengqian , XIAO, Le , LIAO, Fengyun , QI, Xin
IPC分类号： H04R1/10
摘要： Embodiments of the present disclosure disclose an acoustic device and a method for determining a transfer function thereof. The acoustic device includes a sound production unit, a first detector, a processor, and a fixing structure. The sound production unit is configured to generate a first sound signal based on a noise reduction control signal. The first detector is configured to obtain a first residual signal. The first residual signal includes a residual noise signal formed by superposition of an environmental noise and the first sound signal at a location where the first detector is located. The processor is configured to estimate a second residual signal at a target spatial location based on the first sound signal and the first residual signal, and update the noise reduction control signal based on the second residual signal. The fixing structure is configured to place the acoustic device at a location near a user's ear but not blocking the user's ear canal. The target spatial location is closer to the user's ear canal than the first detector.

3. 发明公开

EP4004915A1 SYSTEMS AND METHODS FOR NOISE REDUCTION USING SUB-BAND NOISE REDUCTION TECHNIQUE 有权
公开(公告)号：EP4004915A1
公开(公告)日：2022-06-01
申请号：EP19947586.4
申请日：2019-09-30
申请人： Shenzhen Shokz Co., Ltd.
发明人： ZHANG, Chengqian , LIAO, Fengyun , QI, Xin
IPC分类号： G10L21/0208 , G10L21/0216

4. 发明公开

EP4307298A1 VOICE ACTIVITY DETECTION METHOD AND SYSTEM, AND VOICE ENHANCEMENT METHOD AND SYSTEM 审中-实审
公开(公告)号：EP4307298A1
公开(公告)日：2024-01-17
申请号：EP21968425.5
申请日：2021-12-20
申请人： Shenzhen Shokz Co., Ltd.
发明人： XIAO, Le , ZHANG, Chengqian , LIAO, Fengyun , QI, Xin
IPC分类号： G10L25/78 , G10L21/0232 , G10L21/0208
摘要： A voice activity detection method and system and a voice enhancement method and system are provided. A voice presence probability of a target voice signal present in microphone signals may be determined by calculating a linear correlation between a signal subspace where the microphone signals are located and a target subspace where the target voice signal is located. The voice enhancement method and system may be used to calculate filter coefficients based on the voice presence probability, so as to perform voice enhancement on the microphone signals. The calculation accuracy of the voice presence probability is improved, and the voice enhancement effect is also improved.

5. 发明公开

EP4227941A1 SPEECH PRESENCE PROBABILITY CALCULATING METHOD AND SYSTEM, SPEECH ENHANCEMENT METHOD AND SYSTEM, AND HEADPHONES 审中-实审
公开(公告)号：EP4227941A1
公开(公告)日：2023-08-16
申请号：EP21960151.5
申请日：2021-10-11
申请人： Shenzhen Shokz Co., Ltd.
发明人： XIAO, Le , ZHANG, Chengqian , LIAO, Fengyun , QI, Xin
IPC分类号： G10L25/78 , H04R1/00
摘要： The present disclosure provides a method and system for determining a speech presence probability, a speech enhancement method and system, and a headphone. The speech presence probability and a speech absence probability in an iteration operation may be corrected by comparing an entropy of the speech presence probability and an entropy of a speech absence probability, such that a faster convergence speed and better convergence results may be obtained, thereby improving accuracy of an estimation of the speech presence probability and an accuracy of an estimation of a noise spatial covariance matrix, and then improving a speech enhancement effect of a minimum variance distortionless response (MVDR).

6. 发明公开

EP4131997A1 EARPHONE 审中-实审
公开(公告)号：EP4131997A1
公开(公告)日：2023-02-08
申请号：EP21938133.2
申请日：2021-11-19
申请人： Shenzhen Shokz Co., Ltd.
发明人： ZHENG, Jinbo , ZHANG, Chengqian , XIAO, Le , LIAO, Fengyun , QI, Xin
IPC分类号： H04R1/10 , H04R25/00
摘要： One or more embodiments of the present disclosure disclose an earphone. The earphone may include: a fixing structure configured to fix the earphone near a user's ear without blocking the user's ear canal and including a hook-shaped component and a body part, wherein when the user wears the earphone, the hook-shaped component is hung between a first side of the ear and a head of the user, and the body part contacts a second side of the ear; a first microphone array located in the body part and configured to pick up environmental noise; a processor located in the hook-shaped component or the body part and configured to: estimate a sound field at a target spatial position using the first microphone array, the target spatial position being closer to the user's ear canal than any microphone in the first microphone array, and generate a noise reduction signal based on the estimated sound field at the target spatial position; and a speaker located in the body part and configured to output a target signal according to the noise reduction signal. The target signal may be transmitted to outside of the earphone through a sound outlet hole for reducing the environmental noise.

7. 发明公开

EP4307296A1 VOICE ACTIVITY DETECTION METHOD AND SYSTEM, AND VOICE ENHANCEMENT METHOD AND SYSTEM 审中-实审
公开(公告)号：EP4307296A1
公开(公告)日：2024-01-17
申请号：EP21963588.5
申请日：2021-11-11
申请人： Shenzhen Shokz Co., Ltd.
发明人： XIAO, Le , ZHANG, Chengqian , LIAO, Fengyun , QI, Xin
IPC分类号： G10L21/02 , G10L15/14 , G10L17/04 , G10L17/06
摘要： A voice activity detection method and system, and a voice enhancement method and system are provided in this specification. The microphone signals output by the microphone array satisfy a first model corresponding to a noise signal or a second model corresponding to a target voice signal mixed with a noise signal. The method and system may optimize the first model and the second model respectively by using maximization of a likelihood function and rank minimization of a noise covariance matrix as joint optimization objectives, and determine a first estimate of a noise covariance matrix of the first model and a second estimate of a noise covariance matrix of the second model; and determine, by using a statistical hypothesis testing method, whether the microphone signals satisfy the first model or the second model, so as to determine whether the target voice signal is present in the microphone signals, determine a noise covariance matrix of the microphone signals, and further perform voice enhancement on the microphone signals. The method and system may improve accuracy of noise covariance estimation, and further improve the voice enhancement effects.

8. 发明公开

EP4273853A1 ACTIVE NOISE REDUCTION AUDIO DEVICE, METHOD, AND STORAGE MEDIUM 审中-实审
公开(公告)号：EP4273853A1
公开(公告)日：2023-11-08
申请号：EP22922538.8
申请日：2022-02-08
申请人： Shenzhen Shokz Co., Ltd.
发明人： ZHANG, Chengqian , ZHENG, Jinbo
IPC分类号： G10K11/178 , H04R3/00 , H04R1/10
摘要： The present disclosure provides an active noise control audio device, method and storage medium. The device includes: a speaker, a microphone, an analog filter, and a processing circuit. The speaker used to generate a noise reduction sound; the microphone used to collect an environmental noise and the noise reduction sound and generate a first analog signal; the analog filter used to provide a gain for the first analog signal and to generate a second analog signal, the second analog signal driving the speaker to generate the noise reduction sound; and the processing circuit used to send a control instruction to the analog filter to adjust the gain and a phase shift of the analog filter according to the first analog signal and the second analog signal. By using the analog filter to adjust the amplitude and phase of the analog signal and generating the noise reduction sound in this way, this present disclosure can reduce the time delay caused by the signal transformation link and the digital filter processing, making it possible for the audio device to respond to noise reduction in a timely manner, and thus, improving the noise reduction effect.

9. 发明公开

EP4210350A1 OPEN ACOUSTIC APPARATUS 审中-实审
公开(公告)号：EP4210350A1
公开(公告)日：2023-07-12
申请号：EP22793098.9
申请日：2022-02-25
申请人： Shenzhen Shokz Co., Ltd.
发明人： ZHANG, Chengqian , ZHENG, Jinbo , XIAO, Le , LIAO, Fengyun , QI, Xin
IPC分类号： H04R3/00 , H04R1/10 , G10K11/178
摘要： An open acoustic device (100) may include a fixing structure (120) configured to fix the acoustic device (100) near an ear of a user without blocking an ear canal of the user; a first microphone array (130) configured to acquire environmental noise (410); a signal processor (140) configured to: determine, based on the environmental noise, a primary route transfer function (420) between the first microphone array (130) and the ear canal of the user; estimate, based on the environmental noise and the primary route transfer function, a noise signal (430) at the ear canal of the user; and generate, based on the noise signal at the ear canal of the user, a noise reduction signal (440); and a speaker (150) configured to output, according to the noise reduction signal, a noise reduction acoustic wave (450), the noise reduction acoustic wave being configured to eliminate the noise signal.

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