公开(公告)号：WO2017147545A1

公开(公告)日：2017-08-31

申请号：PCT/US2017/019540

申请日：2017-02-24

Applicant: AVNERA CORPORATION

Inventor： WURTZ, Michael ,  SORENSEN, Eric

IPC: H04R1/10

CPC classification number: H04R1/1083 ,  A61F11/08 ,  G10K11/178 ,  G10K11/17857 ,  G10K11/17881 ,  G10K2210/1081 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3028 ,  G10K2210/3219 ,  G10K2210/3226 ,  H04R1/1016 ,  H04R23/006 ,  H04R2201/003 ,  H04R2410/05 ,  H04R2460/01

Abstract: Automatic noise-reduction (ANR) headsets include circuitry that cancels or suppress undesired noises. Recent years have seen the emergence of in-the-ear (ITE) earphones that incorporate ANR technology; however, designing them to function well usually entails many design tradeoffs, such as using larger ear nozzles that are uncomfortable to obtain desired noise reduction or that require added structures to hold the earphones to a user ear. To avoid these tradeoffs, the present inventors devised, among other things, an exemplary ITE ANR earphone that places its error measurement microphone in the ear nozzle that connects the driver front acoustic volume to a user ear canal. This placement allows use of a narrower more comfortable ear nozzle without compromising noise reduction and without requiring added holding structures. Moreover, the narrower ear nozzle also lowers the likelihood that the ANR circuitry will become unstable and produce undesirable noise.

Abstract translation: 自动降噪（ANR）耳机包括消除或抑制不想要的噪声的电路。 近年来出现了采用ANR技术的耳内（ITE）耳机; 然而，设计它们以使其良好地工作通常需要许多设计权衡，例如使用较大的耳朵喷嘴以获得期望的降噪或需要增加的结构来将耳机固定到用户耳朵。 为了避免这些折衷，本发明人尤其设计了一种示例性ITE ANR耳机，其将错误测量麦克风放置在将驾驶员前部声学音量连接到用户耳道的耳部喷嘴中。 这种放置允许使用更窄的更舒适的耳塞，而不会降低噪音并且不需要增加保持结构。 而且，较窄的耳塞也降低了ANR电路变得不稳定并产生不​​良噪声的可能性。

公开(公告)号：WO2018191425A1

公开(公告)日：2018-10-18

申请号：PCT/US2018/027180

申请日：2018-04-11

Applicant: PORTLAND STATE UNIVERSITY ,  AVNERA CORPORATION

Inventor： KUMAR, Amit ,  MCNAMES, James

IPC: G01S5/30 ,  G01S15/02

Abstract: A system includes at least one processor and at least one memory storing program instructions that, when executed by the at least one processor, cause the system to send an acoustic ranging transmitter signal between a plurality of calibration reference positions and at least one anchor point, receive an acoustic ranging receiver signal associated with the acoustic ranging transmitter signal and with distances between the plurality of calibration reference positions and the at least one anchor point, and estimate a speed of sound based on the acoustic ranging receiver signal.

公开(公告)号：WO2018148762A3

公开(公告)日：2018-08-16

申请号：PCT/US2018/018075

申请日：2018-02-13

Applicant: AVNERA CORPORATION

Inventor： AN, Jiajin ,  WURTZ, MIchael Jon ,  WURTZ, David ,  KHAIRA, Manpreet ,  KUMAR, Amit ,  O'CONNOR, Shawn ,  RATHOUD, Shankar ,  SCANLAN, James ,  SORENSEN, Eric

IPC: G10L25/78 ,  H04R3/00 ,  H04R5/033 ,  G06F1/32 ,  G10K11/16

Abstract: Many headsets include automatic noise cancellation (ANC) which dramatically reduces perceived background noise and improves user listening experience. Unfortunately, the voice microphones in these devices often capture ambient noise that the headsets output during phone calls or other communication sessions to other users. In response, many headsets and communication devices provide manual muting circuitry, but users frequently forget to turn the muting on and/or off, creating further problems as they communicate. To address this, the present inventors devised, among other things, an exemplary headset that detects the absence or presence of user speech based on two signal derived from the microphones using a matrix of transfer functions, automatically muting and unmuting the voice microphone without user intervention. Some embodiments leverage relationships between feedback and feedforward signals in ANC circuitry to detect user speech, avoiding the addition of extra hardware to the headset. Other embodiments also leverage the speech detection function to activate and deactivate keyword detectors, and/or sidetone circuits, thus extending battery.

公开(公告)号：WO2018119138A1

公开(公告)日：2018-06-28

申请号：PCT/US2017/067712

申请日：2017-12-20

Applicant: AVNERA CORPORATION

Inventor： ZHAO, Xudong ,  STANGE, Alexander, C. ,  O'CONNOR, Shawn ,  HADIASHAR, Ali

IPC: G10L25/78 ,  G10L15/22

Abstract: A system for detecting and capturing voice commands, the system comprising a voice- activity detector (VAD) configured to receive a VAD-received digital-audio signal; determine the amplitude of the VAD-received digital-audio signal; compare the amplitude of the VAD- received digital-audio signal to a first threshold and to a second threshold; withhold a VAD interrupt signal when the amplitude of the VAD-received digital-audio signal does not exceed the first threshold or the second threshold; generate the VAD interrupt signal when the amplitude of the VAD-received digital-audio signal exceeds the first threshold and the second threshold; and perform spectral analysis of the VAD-received digital-audio signal when the amplitude of the VAD-received digital-audio signal is between the first threshold and the second threshold.

公开(公告)号：WO2017156469A1

公开(公告)日：2017-09-14

申请号：PCT/US2017/021929

申请日：2017-03-10

Applicant: AVNERA CORPORATION

Inventor： NILSON, Christopher, D.

IPC: G05F3/26 ,  H03M1/74 ,  H03M1/68

CPC classification number: H03M1/747 ,  G05F3/262 ,  H03M1/00 ,  H03M1/12 ,  H03M1/68

Abstract: A current-mode, digital-to-analog converter (DAC) configured to convert a digital word input having j bits to an analog signal. The DAC has 2 j current sources, an output node, a current divider, a first switch, and a second switch. Each of the 2 j current sources is configured to produce a current having a value I 0 . The current divider has a programmable divide ratio, d, where 1/d is between 0 and 1. The first switch is configured to selectively couple 2 j -l of the 2 j current sources to the output node. One of the 2 j current sources is not coupled to the output node. The second switch is configured to selectively couple each of the 2j current sources to the current divider. This architecture ensures that the fundamental transform of input code to output current always has a slope that does not change from positive to negative or from negative to positive.

Abstract translation: 被配置为将具有j位的数字字输入转换为模拟信号的电流模式数字模拟转换器（DAC）。 DAC具有2个j电流源，一个输出节点，一个分流器，一个第一开关和一个第二开关。 每个2 电流源都配置为产生一个值为I _{0 的电流。 分流器具有可编程的分频比d，其中1 / d在0和1之间。第一开关被配置为选择性地耦合2 j -l >输出节点的电流源。 其中一个2 电流源不耦合到输出节点。 第二开关被配置为选择性地将每个2j个电流源耦合到分流器。 这种架构确保输入代码到输出电流的根本转换始终具有不会从正变负或从负变正的斜率。}

公开(公告)号：WO2017087711A1

公开(公告)日：2017-05-26

申请号：PCT/US2016/062596

申请日：2016-11-17

Applicant: AVNERA CORPORATION

Inventor： SORENSEN, Eric ,  IRRGANG, Thomas ,  WURTZ, Mike

IPC: H04M1/60 ,  H04M1/725

CPC classification number: H04M9/082 ,  H04M1/6041 ,  H04M1/62 ,  H04M1/72527

Abstract: A portable speakerphone having a housing, a receiving transducer, an electrical cable, a transmitting transducer, and a processor. The receiving transducer is affixed to the housing and is configured to receive a first electrical signal from a mobile device. The electrical cable is coupled to and extends from the housing. The transmitting transducer is affixed to the electrical cable, remote from the housing. Also, the transmitting transducer is configured to transmit a second electrical signal, and the second electrical signal is based in part on the first electrical signal. The processor is configured to suppress acoustic echo by modifying the second electrical signal. The processor is also configured to output the modified second electrical signal to the mobile device. A related method is also disclosed.

Abstract translation: 具有外壳，接收换能器，电缆，发射换能器和处理器的便携式扬声器电话。 接收换能器被固定到外壳并且被配置为从移动设备接收第一电信号。 电缆连接到外壳并从外壳延伸。 发射换能器固定在远离壳体的电缆上。 而且，发射换能器被配置为发射第二电信号，并且第二电信号部分地基于第一电信号。 处理器被配置为通过修改第二电信号来抑制声学回声。 处理器还被配置为将修改的第二电信号输出到移动设备。 还公开了一种相关的方法。

公开(公告)号：WO2017066709A1

公开(公告)日：2017-04-20

申请号：PCT/US2016/057226

申请日：2016-10-14

Applicant: AVNERA CORPORATION

Inventor： KUMAR, Amit ,  SORENSEN, Eric

IPC: G10K11/178

CPC classification number: G10K11/178 ,  G10K2210/1081 ,  G10K2210/3014 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3028

Abstract: A system including an automatic noise canceling (ANC) headphone and a processor. The ANC headphone has a microphone configured to generate a microphone signal and at least two non-zero ANC gain levels. The processor is configured to receive the microphone signal, determine a characteristic of the microphone signal, identify a revised ANC level from the ANC gain levels based on a comparison of the characteristic to at least one threshold, and output a signal corresponding to the revised ANC level. Methods are also disclosed.

Abstract translation: 包括自动噪声消除（ANC）耳机和处理器的系统。 ANC头戴式耳机具有配置成产生麦克风信号和至少两个非零ANC增益水平的麦克风。 处理器被配置为接收麦克风信号，确定麦克风信号的特性，基于特性与至少一个阈值的比较从ANC增益水平中识别修正的ANC水平，并且输出对应于修正的ANC的信号 水平。 还公开了方法。

公开(公告)号：WO2014107258A9

公开(公告)日：2014-07-10

申请号：PCT/US2013/073233

申请日：2013-12-05

Applicant: AVNERA CORPORATION

Inventor： WEN, Jianping ,  KUMAR, Amit ,  LINK, Garry, N. ,  LEE, Wai, Laing

IPC: H03M3/00

Abstract: A system and method dynamically selects digital-to-analog (DAC) circuit elements to provide a true differential-output delta-sigma (ΛΣ) DAC. The sign and magnitude m of a received N-bit input code is determined. If the input code comprises a positive value, m + r circuit elements are selected from a plurality of circuit elements by a positive element selector, in which comprises a number of rotational elements, and r circuit elements are selected by a negative element selector. Each selected circuit element comprises a circuit, element that was not selected for an immediately preceding received input code and has a corresponding minimum usage count value. If the input digital code comprises a negative value, m + r circuit elements are selected by the negative element selector, and. r circuit elements are selected by tile positive element selector. The circuit elements are capable of being configured as positive or negative circuit elements.

公开(公告)号：WO2020014151A1

公开(公告)日：2020-01-16

申请号：PCT/US2019/040868

申请日：2019-07-08

Applicant: AVNERA CORPORATION

Inventor： KUMARI, Deepika ,  DOOLITTLE, Colin, Michael ,  KUMAR, Amit

IPC: H04R1/10 ,  G10K11/178 ,  H04R3/00 ,  H04R29/00

Abstract: Disclosed is a signal processor for headphone off-ear detection. The signal processor includes an audio output to transmit an audio signal toward a headphone speaker in a headphone cup. The signal processor also includes a feedback (FB) microphone input to receive a FB signal from a FB microphone in the headphone cup. The signal processor also includes an off-ear detection (OED) signal processor to determine an audio frequency response of the FB signal over an OED frame as a received frequency response. The OED processor also determines an audio frequency response of the audio signal times an off-ear transfer function between the headphone speaker and the FB microphone as an ideal off-ear response. A difference metric is generated comparing the received frequency response to the ideal off-ear frequency response. The difference metric is employed to detect when the headphone cup is disengaged from an ear.

公开(公告)号：WO2019136475A1

公开(公告)日：2019-07-11

申请号：PCT/US2019/012767

申请日：2019-01-08

Applicant: AVNERA CORPORATION

Inventor： WURTZ, David ,  WURTZ, Michael ,  KUMAR, Amit ,  DOOLITTLE, Colin

IPC: G10L21/0208 ,  H04M9/08 ,  H04R3/00 ,  G10K11/175 ,  H04R5/033 ,  G10L21/0216 ,  G10L25/78

CPC classification number: G10L21/0216 ,  G10K11/17827 ,  G10K11/17833 ,  G10K2210/108 ,  G10L15/20 ,  G10L21/0208 ,  G10L25/78 ,  G10L2021/02082 ,  G10L2021/02165 ,  G10L2021/02166 ,  H04M9/082 ,  H04R1/1083 ,  H04R3/005 ,  H04R5/033

Abstract: The disclosure includes a voice isolation system comprising an acoustic echo-cancelation subsystem configured to receive a plurality of input signals, subtract an interference component from the input signals, and provide a plurality of output signals. The system also includes an adaptive beamformer subsystem configured to receive the plurality of output signals from the acoustic echo-cancelation subsystem and compute a signal-to-noise ratio enhanced signal based on the received output signals. The system also includes a residual noise suppressor subsystem configured to attenuate at least one portion of the SNR enhanced signal received from the adaptive beamformer subsystem based on the at least one portion having an SNR below a predetermined SNR threshold. The system also includes an automatic gain control subsystem configured to process a signal outputted from the residual noise suppressor subsystem and transmit a resulting signal as an output signal.