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    Architecture for ensuring monotonicity in a digital-to-analog converter
    92.
    发明授权
    Architecture for ensuring monotonicity in a digital-to-analog converter 有权
    用于确保数模转换器中单调性的架构

    公开(公告)号：US09520893B1

    公开(公告)日：2016-12-13

    申请号：US15067500

    申请日：2016-03-11

    Applicant: AVNERA CORPORATION

    Inventor： Christopher D. Nilson

    IPC: H03M1/06 ,  H03M1/66 ,  G05F3/26 ,  H03M1/00 ,  H03M1/74 ,  H03M1/12

    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 2j current sources, an output node, a current divider, a first switch, and a second switch. Each of the 2j current sources is configured to produce a current having a value I0. 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 2j−1 of the 2j current sources to the output node. One of the 2j 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: 电流模式的数模转换器（DAC），被配置为将具有j位的数字字输入转换为模拟信号。 DAC具有2j电流源，输出节点，分流器，第一开关和第二开关。 每个2j电流源被配置为产生具有值I0的电流。 电流分压器具有可编程分频比d，其中1 / d在0和1之间。第一开关被配置为选择性地将2j电流源的2j-1耦合到输出节点。 2j电流源中的一个未耦合到输出节点。 第二开关被配置为选择性地将2j电流源中的每一个耦合到电流分配器。 这种架构确保输入代码对输出电流的基本变换总是具有不会从正变化到负变化或从负变为正的斜率。

    RATE CONVERTOR
    93.
    发明申请
    RATE CONVERTOR 有权
    速率转换器

    公开(公告)号：US20160140983A1

    公开(公告)日：2016-05-19

    申请号：US14857681

    申请日：2015-09-17

    Applicant: AVNERA CORPORATION

    Inventor： Xudong Zhao

    IPC: G10L21/043 ,  G10L19/008 ,  G10L21/0232 ,  G10L19/02 ,  G10L19/24 ,  G10L21/0224

    CPC classification number: H03H17/0628 ,  G10L19/00 ,  G10L19/24 ,  G10L21/0316 ,  G10L21/0356 ,  G10L2019/001 ,  H03H17/028 ,  H03M5/00 ,  H03M7/00 ,  H03M13/00 ,  H03M13/27 ,  H03M13/33

    Abstract: Embodiments of the invention may be used to implement a rate converter that includes: 6 channels in forward (audio) path, each channel having a 24-bit signal path per channel, an End-to-end SNR of 110 dB, all within the 20 Hz to 20 KHz bandwidth. Embodiment may also be used to implement a rate converter having: 2 channels in a reverse path, such as for voice signals, 16-bit signal path per channel, an End-to-end SNR of 93 dB, all within 20 Hz to 20 KHz bandwidth. The rate converter may include sample rates such as 8, 11.025, 12, 16, 22.05, 24, 32 44.1, 48, and 96 KHz. Further, rate converters according to embodiments may include a gated clock in low-power mode to conserve power.

    Abstract translation: 本发明的实施例可以用于实现速率转换器，其包括：正向（音频）路径中的6个信道，每个信道具有每信道24位信号路径，110dB的端到端SNR，全部在 20 Hz至20 KHz带宽。 实施例还可以用于实现速率转换器，其具有：在反向路径中的2个信道，例如用于语音信号，每信道16位信号路径，93dB的端到端SNR，均在20Hz至20 KHz带宽。 速率转换器可以包括诸如8,11.025,12,16,22.05,24,34,44,48和96KHz的采样率。 此外，根据实施例的速率转换器可以包括低功率模式的门控时钟以节省功率。

    ACOUSTIC LAYER IN MEDIA DEVICE PROVIDING ENHANCED AUDIO PERFORMANCE
    94.
    发明申请
    ACOUSTIC LAYER IN MEDIA DEVICE PROVIDING ENHANCED AUDIO PERFORMANCE 有权
    在提供增强音频性能的媒体设备中的声音层

    公开(公告)号：US20140219490A1

    公开(公告)日：2014-08-07

    申请号：US14231664

    申请日：2014-03-31

    Applicant: Avnera Corporation

    Inventor： Patrick A. Quinn ,  Robert C. Proebstel ,  Manpreet S. Khaira ,  Thomas Irrgang ,  Nigel D. Waites ,  Ian J. Myles

    IPC: H04R1/32

    CPC classification number: H04R1/32 ,  H04R1/026 ,  H04R1/2803 ,  H04R3/005 ,  H04R29/00 ,  H04R2225/33 ,  H04R2400/03 ,  H04R2420/07

    Abstract: An acoustic layer is added to a laptop-type personal computing device, comprising: enclosing walls, optionally—one or more microphones, a signal processing device, at least one audio transducer, and an acoustic waveguide. The acoustic layer adjoins one or more internal areas of a laptop-type device. The signal processing device receives an internal signal from a laptop-type device. The signal processing device provides a directive sound enhancement of the audio input signals based on room acoustics, such as reverberation, echo, noise, delay, frequency response, and/or speaker-positional information that is determined by the signal processing device. The audio transducer device generates an audible audio output in response to an audio signal output from the signal processing device. The acoustic waveguide receives the audible audio output and generates an enhanced bass audio output from the acoustic waveguide.

    Abstract translation: 声学层被添加到笔记本电脑型个人计算设备中，包括：封闭墙壁，可选地一个或多个麦克风，信号处理设备，至少一个音频换能器和声波导。 声学层邻接膝上型设备的一个或多个内部区域。 信号处理装置从笔记本电脑型装置接收内部信号。 信号处理装置基于由信号处理装置确定的诸如混响，回波，噪声，延迟，频率响应和/或扬声器位置信息的房间声学来提供音频输入信号的指令声音增强。 音频换能器装置响应于从信号处理装置输出的音频信号产生可听音频输出。 声波导接收可听音频输出，并从声波导产生增强的低音音频输出。

    Earbud operation during earbud insertion detection
    96.
    发明授权
    Earbud operation during earbud insertion detection 有权

    公开(公告)号：US11611822B2

    公开(公告)日：2023-03-21

    申请号：US17806295

    申请日：2022-06-10

    Applicant: AVNERA CORPORATION

    Inventor： Michael Jon Wurtz ,  Amit Kumar ,  Jiajin An

    IPC: H04R1/10 ,  H04R29/00 ,  H04R3/04 ,  H04R1/08 ,  G10K11/178 ,  H03F13/00 ,  H03G7/00 ,  H03F3/181 ,  H03F3/60

    Abstract: A method of operating a headphone configured to be removed from and placed in close proximity to a user's ear can include generating an input signal by an input signal generating device. The method can also include determining whether an insertion event has occurred based on the generated input signal and causing the headphone to operate in 5 a low power mode responsive to an absence of an insertion event determination after a first period of time. The method can also include causing the headphone to operate in an ultra-low power mode responsive to the absence of an insertion event determination after a second period of time that occurs after the first period of time, the ultra-low power mode having a lower power consumption than the low power mode.

    Automatic playback time adjustment
    97.
    发明授权
    Automatic playback time adjustment 有权

    公开(公告)号：US11366633B2

    公开(公告)日：2022-06-21

    申请号：US16017800

    申请日：2018-06-25

    Applicant: AVNERA CORPORATION

    Inventor： Shawn O'Connor ,  Eric Sorensen ,  Manpreet S. Khaira ,  Sydney Newton

    IPC: G06F3/16 ,  H04R1/10 ,  H04R5/033

    Abstract: An apparatus can include an audio playback device configured to provide an audio output to a user, and a controller configured to: receive an initial playback position within the audio output; determine that an off-ear event has occurred; identify a time corresponding to the off-ear event; instruct the audio playback device to pause the audio output at the identified time; and calculate a new playback position within the audio output based at least in part on the identified time.

    Real-time acoustic processor
    98.
    发明授权
    Real-time acoustic processor 有权

    公开(公告)号：US10650797B2

    公开(公告)日：2020-05-12

    申请号：US16404514

    申请日：2019-05-06

    Applicant: Avnera Corporation

    Inventor： Amit Kumar

    IPC: G10K11/175 ,  G10K11/178

    Abstract: The disclosure includes an acoustic processing network comprising a Digital Signal Processor (DSP) operating at a first frequency and a Real-Time Acoustic Processor (RAP) operating at a second frequency higher than the first frequency. The DSP receives a noise signal from at least one microphone. The DSP then generates a noise filter based on the noise signal. The RAP receives the noise signal from the microphone and the noise filter from the DSP. The RAP then generates an anti-noise signal based on the noise signal and the noise filter for use in Active Noise Cancellation (ANC).

    Hybrid flash architecture of successive approximation register analog to digital converter
    99.
    发明授权
    Hybrid flash architecture of successive approximation register analog to digital converter 有权

    公开(公告)号：US10574254B2

    公开(公告)日：2020-02-25

    申请号：US16173398

    申请日：2018-10-29

    Applicant: Avnera Corporation

    Inventor： Wai Lee ,  Jianping Wen ,  Garry N. Link

    IPC: H03M1/46 ,  H03M1/44 ,  H03M1/10 ,  H03M1/18

    Abstract: The disclosure includes a mechanism for mitigating electrical current leakage in a Successive Approximation Register (SAR) Analog to Digital Converter (ADC) by using a Flash ADC in conjunction with the SAR ADC. A sequence controller in the SAR ADC uses the output of the Flash ADC to control a switch array. Depending on the output of the Flash ADC, the sequence controller can control the switch array to couple at least one capacitor in the capacitor network of the SAR ADC to a voltage that reduces charge leakage in the SAR ADC. The voltage may be a pre-defined positive or negative reference voltage.

    User voice activity detection methods, devices, assemblies, and components
    100.
    发明授权
    User voice activity detection methods, devices, assemblies, and components 有权

    公开(公告)号：US10564925B2

    公开(公告)日：2020-02-18

    申请号：US15711793

    申请日：2017-09-21

    Applicant: Avnera Corporation

    Inventor： Jiajin An ,  Michael Jon Wurtz ,  David Wurtz ,  Manpreet Khaira ,  Amit Kumar ,  Shawn O'Connor ,  Shankar Rathoud ,  James Scanlan ,  Eric Sorensen

    IPC: G10L25/00 ,  G06F3/16 ,  G10L25/84 ,  H04R1/10 ,  H04R3/00 ,  G10L15/08 ,  G10L15/22 ,  H04R1/40

    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, 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.

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