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1. 发明授权

US11418874B2 Techniques for sharing stereo sound between multiple users 有权
公开(公告)号：US11418874B2
公开(公告)日：2022-08-16
申请号：US14634687
申请日：2015-02-27
申请人： HARMAN INTERNATIONAL INDUSTRIES, INC.
发明人： James M. Kirsch , Ajay Iyer , Branden Sheffield
IPC分类号： H04R1/10 , H04R3/00 , H03G3/32 , H04R5/033 , G10L21/0208 , H03G7/00 , H04R3/02 , H04R27/00
摘要： A first digital signal processor (DSP) associated with a first user outputs audio to the first user via first headphones, and captures speech from the first user via a first microphone. Similarly, a second DSP associated with a second user outputs audio to the second user via second headphones, and captures speech from the second user via a second microphone. The first DSP is coupled to the second DSP in order to allow the first and second users to share music and communicate with one another. The first user may speak into the first microphone, and the first and second DSPs may then interoperate to output that speech to the second user without substantially disrupting audio output to the second user. Each of the first and second users may also select between first and second audio sources that may be coupled to the first and second DSPs, respectively.

2. 发明授权

US09820046B2 Compensation of air path distortions using backpropagation 有权
公开(公告)号：US09820046B2
公开(公告)日：2017-11-14
申请号：US15130794
申请日：2016-04-15
申请人： Harman International Industries, Inc.
发明人： Shreyas Srikanth Payal , V. John Mathews , Douglas J. Button , Ajay Iyer , Russell H. Lambert
IPC分类号： H04B15/00 , H04R3/04 , H04R29/00 , H04R27/00
CPC分类号： H04R3/04 , H04R27/00 , H04R29/001 , H04R29/007
摘要： In one embodiment, a pre-correcting engine generates a pre-corrected signal that may be used to mitigate air path distortions in sounds generated by loudspeaker systems that include loudspeakers coupled to waveguides. In operation, the pre-correcting engine virtually propagates a target signal in a reverse direction from the output of the waveguide to the output of a driver. Notably, the pre-correcting engine implements a propagation distortion compensation model that, when applied to the target signal, corrects for the effects of air path distortions on the target signal. The pre-correcting engine then transmits the pre-corrected signal to the driver. As the driver drives the waveguide based on the pre-corrected signal, effects of the pre-corrected distortions negate effects of air path distortions and the loudspeaker system generates high-fidelity sounds. By contrast, conventional loudspeaker systems that drive the waveguide based on the target signal typically generate lower fidelity sounds that include air path distortions.

3. 发明申请

US20150358730A1 Approach for partially preserving music in the presence of intelligible speech 有权
标题翻译：在可理解语音的情况下部分保留音乐的方法
公开(公告)号：US20150358730A1
公开(公告)日：2015-12-10
申请号：US14545672
申请日：2015-06-04
申请人： HARMAN INTERNATIONAL INDUSTRIES, INC
发明人： James M. Kirsch , Ajay Iyer , Richard Allen Kreifeldt
IPC分类号： H04R3/00 , G10L21/02 , G10L25/78
CPC分类号： H04R3/002 , G10L21/02 , G10L21/0364 , G10L25/78 , G10L25/84 , H03G9/005 , H03G9/025 , H04R1/1041 , H04R3/005 , H04R3/04 , H04R2420/01 , H04R2420/07 , H04R2430/01
摘要： An audio processing system for a listening device includes an input device, a voice activity detector and a ratio-based attenuator. The input device is configured to receive a first audio signal emanating from an environment and including a signal of interest. The voice activity detector is configured to generate a control signal in response to the first audio signal. The ratio-based attenuator is configured to receive the control signal and determine whether the signal level of the first audio signal exceeds the signal level of an audio signal received from an audio playback device by at least a target difference. If so, then the audio level of the playback audio signal is maintained. Otherwise, the audio level of the playback audio signal is adjusted, where, at the adjusted value, the first signal level exceeds the playback signal level by at least the target difference.
摘要翻译：用于听音装置的音频处理系统包括输入装置，语音活动检测器和基于比率的衰减器。输入设备被配置为接收从环境发出并包括感兴趣的信号的第一音频信号。语音活动检测器被配置为响应于第一音频信号而产生控制信号。基于比率的衰减器被配置为接收控制信号，并且确定第一音频信号的信号电平是否超过从音频播放装置接收的至少目标差的音频信号的信号电平。如果是，则保持回放音频信号的音频电平。否则，调整回放音频信号的音频电平，其中在调整后的值下，第一信号电平至少超过重放信号电平至少目标差值。

4. 发明申请

US20170223451A1 Approach for partially preserving music in the presence of intelligible speech 审中-公开
公开(公告)号：US20170223451A1
公开(公告)日：2017-08-03
申请号：US15530989
申请日：2017-03-31
申请人： HARMAN INTERNATIONAL INDUSTRIES, INC.
发明人： James M. Kirsch , Ajay Iyer , Richard Allen Kreifeldt
IPC分类号： H04R3/00 , G10L25/84 , H04R3/04 , G10L21/0364
CPC分类号： H04R3/002 , G10L21/02 , G10L21/0364 , G10L25/78 , G10L25/84 , H03G9/005 , H03G9/025 , H04R1/1041 , H04R3/005 , H04R3/04 , H04R2420/01 , H04R2420/07 , H04R2430/01
摘要： An audio processing system for a listening device includes an input device, a voice activity detector and a ratio-based attenuator. The input device is configured to receive a first audio signal emanating from an environment and including a signal of interest. The voice activity detector is configured to generate a control signal in response to the first audio signal. The ratio-based attenuator is configured to receive the control signal and determine whether the signal level of the first audio signal exceeds the signal level of an audio signal received from an audio playback device by at least a target difference. If so, then the audio level of the playback audio signal is maintained. Otherwise, the audio level of the playback audio signal is adjusted, where, at the adjusted value, the first signal level exceeds the playback signal level by at least the target difference.

5. 发明申请

US20160345094A1 COMPENSATION OF AIR PATH DISTORTIONS USING BACKPROPAGATION 有权
标题翻译：使用背景补偿空气路径失真
公开(公告)号：US20160345094A1
公开(公告)日：2016-11-24
申请号：US15130794
申请日：2016-04-15
申请人： Harman International Industries, Inc.
发明人： Shreyas Srikanth Payal , V. John Mathews , Douglas J. Button , Ajay Iyer , Russell H. Lambert
IPC分类号： H04R3/04 , H04R29/00
CPC分类号： H04R3/04 , H04R27/00 , H04R29/001 , H04R29/007
摘要： In one embodiment, a pre-correcting engine generates a pre-corrected signal that may be used to mitigate air path distortions in sounds generated by loudspeaker systems that include loudspeakers coupled to waveguides. In operation, the pre-correcting engine virtually propagates a target signal in a reverse direction from the output of the waveguide to the output of a driver. Notably, the pre-correcting engine implements a propagation distortion compensation model that, when applied to the target signal, corrects for the effects of air path distortions on the target signal. The pre-correcting engine then transmits the pre-corrected signal to the driver. As the driver drives the waveguide based on the pre-corrected signal, effects of the pre-corrected distortions negate effects of air path distortions and the loudspeaker system generates high-fidelity sounds. By contrast, conventional loudspeaker systems that drive the waveguide based on the target signal typically generate lower fidelity sounds that include air path distortions.
摘要翻译：在一个实施例中，预校正引擎产生预校正的信号，其可以用于减轻由包括耦合到波导的扬声器的扬声器系统产生的声音中的空气路径失真。在操作中，预校正引擎将从波导的输出到驱动器的输出的相反方向虚拟地传播目标信号。值得注意的是，预校正引擎实现了传播失真补偿模型，当应用于目标信号时，校正气道失真对目标信号的影响。预校正引擎然后将预校正的信号发送到驾驶员。当驱动器基于预校正的信号驱动波导时，预校正的失真的影响否定空气路径失真的影响，并且扬声器系统产生高保真声音。相比之下，基于目标信号驱动波导的常规扬声器系统通常产生包括气道失真的较低保真声音。

6. 发明授权

US09628926B2 Modeling loudspeakers based on cascading lumped parameter models with neural networks 有权
公开(公告)号：US09628926B2
公开(公告)日：2017-04-18
申请号：US14702382
申请日：2015-05-01
申请人： HARMAN INTERNATIONAL INDUSTRIES, INC
发明人： Ajay Iyer
IPC分类号： H04R29/00 , H04R3/00 , H03G11/00
CPC分类号： H04R29/001 , H03G11/00 , H04R3/007
摘要： In one embodiment of the present invention, a loudspeaker modeling subsystem configures a neural lumped parameter loudspeaker (NeLP) model to represent the behavior of a loudspeaker. The NeLP model is implemented as a cascaded combination of a lumped parameter model (LPM) and a neural network (NN) model. To configure the model, the loudspeaker modeling subsystem first estimates values for the parameters used in the LPM. The loudspeaker modeling subsystem then “fixes” these parameters and trains the NN model to act on a predicted output pressure that is generated via the LPM. More specifically, the loudspeaker modeling subsystem configures the NN to modify the predicted output pressure to minimize the error between the predicted output pressure and a measured loudspeaker output pressure. Notably, by strategically fusing the LPM and the NN model, the NeLP model leverages the strengths and mitigates the weaknesses typically associated with conventional loudspeaker modeling techniques.

7. 发明授权

US09615170B2 Approach for partially preserving music in the presence of intelligible speech 有权
公开(公告)号：US09615170B2
公开(公告)日：2017-04-04
申请号：US14545672
申请日：2015-06-04
申请人： HARMAN INTERNATIONAL INDUSTRIES, INC
发明人： James M. Kirsch , Ajay Iyer , Richard Allen Kreifeldt
IPC分类号： G10K11/16 , H04R3/00 , G10L25/78 , G10L21/02 , G10L21/0364 , H04R1/10 , H03G9/00 , H03G9/02 , G10L25/84
CPC分类号： H04R3/002 , G10L21/02 , G10L21/0364 , G10L25/78 , G10L25/84 , H03G9/005 , H03G9/025 , H04R1/1041 , H04R3/005 , H04R3/04 , H04R2420/01 , H04R2420/07 , H04R2430/01
摘要： An audio processing system for a listening device includes an input device, a voice activity detector and a ratio-based attenuator. The input device is configured to receive a first audio signal emanating from an environment and including a signal of interest. The voice activity detector is configured to generate a control signal in response to the first audio signal. The ratio-based attenuator is configured to receive the control signal and determine whether the signal level of the first audio signal exceeds the signal level of an audio signal received from an audio playback device by at least a target difference. If so, then the audio level of the playback audio signal is maintained. Otherwise, the audio level of the playback audio signal is adjusted, where, at the adjusted value, the first signal level exceeds the playback signal level by at least the target difference.

8. 发明申请

US20170243111A1 NEURAL NETWORK-BASED PARAMETER ESTIMATION OF LOUDSPEAKERS 审中-公开
公开(公告)号：US20170243111A1
公开(公告)日：2017-08-24
申请号：US15051452
申请日：2016-02-23
申请人： Harman International Industries, Inc.
发明人： Ajay Iyer , Meenakshi Barjatia
IPC分类号： G06N3/08 , H04R29/00
CPC分类号： H04R29/001 , G06N3/084
摘要： A technique for estimating a set of parameter values for a lumped parameter model of a loudspeaker. The technique includes determining, via a neural network model, a first set of parameter values for the LPM of the loudspeaker based on an audio input signal and a first measured response of a loudspeaker that corresponds to the audio input signal. The technique further includes generating a first LPM response based on the first set of parameter values and comparing the first LPM response to the first measured response of the loudspeaker to determine a first error value. The technique further includes generating, via the neural network model, a second set of parameter values for the LPM of the loudspeaker based on the first error value.

9. 发明授权

US10757519B2 Neural network-based parameter estimation of loudspeakers 有权
公开(公告)号：US10757519B2
公开(公告)日：2020-08-25
申请号：US15051452
申请日：2016-02-23
申请人： Harman International Industries, Inc.
发明人： Ajay Iyer , Meenakshi Barjatia
IPC分类号： H04R29/00 , G06N3/08
摘要： A technique for estimating a set of parameter values for a lumped parameter model of a loudspeaker. The technique includes determining, via a neural network model, a first set of parameter values for the LPM of the loudspeaker based on an audio input signal and a first measured response of a loudspeaker that corresponds to the audio input signal. The technique further includes generating a first LPM response based on the first set of parameter values and comparing the first LPM response to the first measured response of the loudspeaker to determine a first error value. The technique further includes generating, via the neural network model, a second set of parameter values for the LPM of the loudspeaker based on the first error value.

10. 发明授权

US10368164B2 Approach for partially preserving music in the presence of intelligible speech 有权
公开(公告)号：US10368164B2
公开(公告)日：2019-07-30
申请号：US15530989
申请日：2017-03-31
申请人： HARMAN INTERNATIONAL INDUSTRIES, INC.
发明人： James M. Kirsch , Ajay Iyer , Richard Allen Kreifeldt
IPC分类号： A61F11/06 , G10K11/16 , H03B29/00 , H04R3/00 , G10L25/78 , G10L21/02 , G10L21/0364 , G10L25/84 , H04R1/10 , H03G9/00 , H03G9/02 , H04R3/04
摘要： An audio processing system for a listening device includes an input device, a voice activity detector and a ratio-based attenuator. The input device is configured to receive a first audio signal emanating from an environment and including a signal of interest. The voice activity detector is configured to generate a control signal in response to the first audio signal. The ratio-based attenuator is configured to receive the control signal and determine whether the signal level of the first audio signal exceeds the signal level of an audio signal received from an audio playback device by at least a target difference. If so, then the audio level of the playback audio signal is maintained. Otherwise, the audio level of the playback audio signal is adjusted, where, at the adjusted value, the first signal level exceeds the playback signal level by at least the target difference.

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