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公开(公告)号：US09431982B1
公开(公告)日：2016-08-30
申请号：US14672293
申请日：2015-03-30
Applicant: Amazon Technologies, Inc.
Inventor： Jun Yang , Philip Ryan Hilmes , Chad Georges Seguin
IPC: H03G3/20
Abstract: A loudness learning and balancing system for one or more audio channels. The system learns user volume preferences from manual interventions, providing effective and robust loudness learning to provide a consistent and balanced sonic experience. The system also reduces and/or eliminates incorrect attenuation or over-amplification of quiet interludes in the audio material, thereby eliminating artifacts such as noise pumping or breathing. In addition, the system reduces low level noise in the audio signals while preserving a wide dynamic range at most listening levels.
Abstract translation: 一个或多个音频通道的响度学习和平衡系统。 该系统从手动干预中学习用户体积偏好，提供有效和鲁棒的响度学习，以提供一致和平衡的声音体验。 该系统还减少和/或消除音频材料中的安静插入物的不正确衰减或过度放大，从而消除噪声抽吸或呼吸等伪像。 此外，该系统降低了音频信号中的低电平噪声，同时在大多数聆听电平下保持了宽的动态范围。
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公开(公告)号：US10897670B1
公开(公告)日：2021-01-19
申请号：US16176849
申请日：2018-10-31
Applicant: Amazon Technologies, Inc.
Inventor： Jun Yang
Abstract: A system manages temperature and excursion effects on a loudspeaker. Data corresponding to a temperature of the loudspeaker and data corresponding to an excursion (i.e., displacement) of a membrane of the loudspeaker are determined. The dynamic ranges of the temperature and excursion data are compressed, combined, and smoothed. This smoothed data is multiplied with a delayed version of audio data; peak values of the result may be limited. This operation may be performed on multiple frequency bands of audio data. The final output data is combined to form a full-band signal and sent to a loudspeaker.
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公开(公告)号：US09749741B1
公开(公告)日：2017-08-29
申请号：US15130355
申请日：2016-04-15
Applicant: Amazon Technologies, Inc.
Inventor： Jun Yang , Colin Randall McEnroe , Jian Guo
IPC: H04R3/00
CPC classification number: H04R3/007 , H04R3/005 , H04R2430/01 , H04R2430/03
Abstract: Methods and devices for reducing intermodulation distortion are described herein. In response to receiving an audio input signal, N filtered audio signals may be generated by a filter bank, corresponding to N different frequency bands. The N filtered audio signals may be delayed by a delay time D, and a determination of whether an audio frame of the filtered audio signals includes an audio event or a non-audio event. A signal level estimation may then be determined, the signal level estimation indicating an expander, a compressor, or no compression effects being present. An amount of gain is determined and applied to the delayed audio signals, which are summed across the N frequency bands to generate a full-band audio signal. In some embodiments, the full-band audio signal may be applied to a limiter to reduce any audio clipping, and a final audio signal may be generated.
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公开(公告)号：US09391575B1
公开(公告)日：2016-07-12
申请号：US14106529
申请日：2013-12-13
Applicant: Amazon Technologies, Inc.
Inventor： Jun Yang
CPC classification number: H03G3/3005 , H03G3/3089 , H03G3/32 , H03G9/005 , H03G9/025
Abstract: Loudness control is performed by estimating the energy and loudness of an audio signal. Loudness of the audio signal is determined by decomposing the audio signal into multiple frequency bands at different center frequencies. The energy of the audio signal in each frequency band is calculated and converted to a loudness, using a function that models human loudness perceptions of audio energies at different frequencies. The loudnesses are summed to obtain the total loudness of the audio signal. A signal gain is calculated as a function of a loudness setting provided by a human listener, the estimated signal energy, and the total loudness of the audio signal.
Abstract translation: 通过估计音频信号的能量和响度来进行响度控制。 通过将音频信号分解成不同中心频率的多个频带来确定音频信号的响度。 使用对不同频率的音频能量的人类响度感知的函数来计算每个频带中的音频信号的能量并将其转换成响度。 将响度相加以获得音频信号的总响度。 根据人类听众提供的响度设置，估计的信号能量和音频信号的总响度来计算信号增益。
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公开(公告)号：USD970498S1
公开(公告)日：2022-11-22
申请号：US29660336
申请日：2018-08-20
Applicant: Amazon Technologies, Inc.
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Patent Agency Ranking
公开(公告)号：US10461712B1
公开(公告)日：2019-10-29
申请号：US15714717
申请日：2017-09-25
Applicant: Amazon Technologies, Inc.
Inventor： Jun Yang , Craig McFarland , Yingbin Liu
Abstract: Devices and techniques are generally described for automatic volume leveling of an audio signal. An audio signal may be received and a first portion of the audio signal may be stored in a buffer. A root mean square (RMS) estimate of a level of the first portion of the audio signal may be determined based at least in part on a second portion of the audio signal previous to the first portion. A modified audio signal may be generated by multiplying the first portion of the audio signal in the buffer by a variable gain. The variable gain may be based at least in part on the RMS estimate. The modified audio signal may be sent to a loudspeaker.
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公开(公告)号：US10250975B1
公开(公告)日：2019-04-02
申请号：US15726831
申请日：2017-10-06
Applicant: Amazon Technologies, Inc.
Inventor： Jun Yang
IPC: H04R3/00
Abstract: A hands-free audio device has a receive path and a transmit path, which may operate at different audio sampling rates. The transmit path has an interference suppressor that receives a reference signal from the receive path and that suppresses interference in microphone signals received from a microphone array. The interference suppressor is followed in the transmit path by a multi-channel adaptive beamformer that produce a plurality of directional audio signals. A beam selector is configured to select one of the directional audio signals based on voice activity, echo detection, and signal energy.
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公开(公告)号：USD908693S1
公开(公告)日：2021-01-26
申请号：US29598854
申请日：2017-03-29
Applicant: Amazon Technologies, Inc.
Designer： Jonathan Howard Biddle , Jun Yang , Robert Brian Curtis
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公开(公告)号：US09813808B1
公开(公告)日：2017-11-07
申请号：US13826740
申请日：2013-03-14
Applicant: Amazon Technologies, Inc.
Inventor： Jun Yang
IPC: H04R3/00
Abstract: A hands-free audio device has a receive path and a transmit path, which may operate at different audio sampling rates. The transmit path has an interference suppressor that receives a reference signal from the receive path and that suppresses interference in microphone signals received from a microphone array. The interference suppressor is followed in the transmit path by a multi-channel adaptive beamformer that produce a plurality of directional audio signals. A beam selector is configured to select one of the directional audio signals based on voice activity, echo detection, and signal energy.
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公开(公告)号：US09614486B1
公开(公告)日：2017-04-04
申请号：US14984770
申请日：2015-12-30
Applicant: Amazon Technologies, Inc.
Inventor： Jun Yang , Philip Ryan Hilmes , Colin McEnroe , Chad G Seguin
CPC classification number: H03G3/3005 , H03G3/3089 , H03G7/002 , H03G7/007
Abstract: A gain control system is responsive to a user gain setting and to an effective signal level to calculate and adaptively vary an output gain to avoid output clipping. The effective signal level is calculated by smoothing the energy of an input audio signal in accordance with selected attenuation factors. In times during which fast transient sounds are occurring, attenuation factors corresponding to relatively low levels of attenuation are selected. In times during which fast transient sounds are not detected, attenuation factors corresponding to relatively higher levels of attenuation are selected. The effective signal level is held at a constant level during periods of silence in order to avoid increasing the output gain during these periods. The output gain is calculated based on a comparison of the effective signal level to a compression threshold.
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