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    IMPLICIT TARGET SELECTION FOR MULTIPLE AUDIO PLAYBACK DEVICES IN AN ENVIRONMENT
    1.
    发明申请
    IMPLICIT TARGET SELECTION FOR MULTIPLE AUDIO PLAYBACK DEVICES IN AN ENVIRONMENT 有权

    公开(公告)号：US20210074291A1

    公开(公告)日：2021-03-11

    申请号：US17099060

    申请日：2020-11-16

    Applicant: Amazon Technologies, Inc.

    Inventor： Fred Torok ,  Michael Alan Pogue ,  Vikram Kumar Gundeti ,  Dharini Sundaram

    IPC: G10L15/22 ,  G06F3/16

    Abstract: A user can utter a voice command in an environment where multiple audio playback devices are located to have audio output on a single device, or a predefined group of devices in a synchronized manner. In instances when the voice command uttered by the user does not specify a target for audio output, an implicit target selection algorithm can evaluate one or more criteria to determine an appropriate target for output of the audio corresponding to the voice command. An example criterion is met if a predetermined time period has lapsed since a last utterance was detected by a device in the environment. However, other criteria can be evaluated for determining a target output device(s).

    Detecting Self-Generated Wake Expressions
    2.
    发明申请
    Detecting Self-Generated Wake Expressions 有权

    公开(公告)号：US20210005197A1

    公开(公告)日：2021-01-07

    申请号：US16933904

    申请日：2020-07-20

    Applicant: Amazon Technologies, Inc.

    Inventor： Michael Alan Pogue ,  Philip Ryan Hilmes

    IPC: G10L15/22

    Abstract: A speech-based audio device may be configured to detect a user-uttered wake expression. For example, the audio device may generate a parameter indicating whether output audio is currently being produced by an audio speaker, whether the output audio contains speech, whether the output audio contains a predefined expression, loudness of the output audio, loudness of input audio, and/or an echo characteristic. Based on the parameter, the audio device may determine whether an occurrence of the predefined expression in the input audio is a result of an utterance of the predefined expression by a user.

    SELECTION OF MASTER DEVICE FOR SYNCHRONIZED AUDIO
    4.
    发明申请
    SELECTION OF MASTER DEVICE FOR SYNCHRONIZED AUDIO 审中-公开

    公开(公告)号：US20190238983A1

    公开(公告)日：2019-08-01

    申请号：US16377044

    申请日：2019-04-05

    Applicant: Amazon Technologies, Inc.

    Inventor： Fred Torok ,  Michael Alan Pogue ,  Vikram Kumar Gundeti ,  Dharini Sundaram

    IPC: H04R3/12 ,  H04R27/00 ,  G06F3/16

    CPC classification number: H04R3/12 ,  G06F3/165 ,  G06F3/167 ,  H04R27/00 ,  H04R2227/005 ,  H04R2420/03 ,  H04R2420/07

    Abstract: Synchronized output of audio on a group of devices can comprise sending audio data from an audio distribution master device to one or more slave devices in the group. Scores can be assigned to respective audio playback devices, the scores being indicative of a performance level of the respective audio playback devices acting as a master device. The device with the highest score is designated as a candidate master device and one or more remaining devices are designated as a candidate slave(s). A throughput test is conducted with the highest scoring device acting as the candidate master device. The results of the throughput test are used to determine a master device for a group of devices. Latency of the throughput test can be reduced by using a prescribed time period for completion of the throughput test, and/or by selecting a first group configuration to passes the throughput test.

    Multiple device audio-video synchronization
    6.
    发明授权
    Multiple device audio-video synchronization 有权

    公开(公告)号：US11089183B1

    公开(公告)日：2021-08-10

    申请号：US16546245

    申请日：2019-08-20

    Applicant: Amazon Technologies, Inc.

    Inventor： Michael Alan Pogue ,  Shao-Cheng Wang

    IPC: H04N21/4425 ,  H04N21/6375 ,  H04N21/647 ,  H04N5/04 ,  H04N21/439 ,  H04N21/43

    Abstract: Systems and methods for adaptive information packet transmission are disclosed. For example, one or more backup packets may be generated for a given data packet and a packet-spacing value and/or packet-sending order may be determined based at least in part on packet-loss data and/or other factors. The data packets and backup packets may be sent according to the packet-spacing value and packet-sending order, and feedback data may be provided by the receiving device. The feedback data may be utilized by the sending device to adapt the packet transmission parameters.

    Detecting self-generated wake expressions
    7.
    发明授权
    Detecting self-generated wake expressions 有权

    公开(公告)号：US10720155B2

    公开(公告)日：2020-07-21

    申请号：US15652019

    申请日：2017-07-17

    Applicant: Amazon Technologies, Inc.

    Inventor： Michael Alan Pogue ,  Philip Ryan Hilmes

    IPC: G10L15/22 ,  G10L21/0208 ,  G10L15/08 ,  G10L21/0216

    Abstract: A speech-based audio device may be configured to detect a user-uttered wake expression. For example, the audio device may generate a parameter indicating whether output audio is currently being produced by an audio speaker, whether the output audio contains speech, whether the output audio contains a predefined expression, loudness of the output audio, loudness of input audio, and/or an echo characteristic. Based on the parameter, the audio device may determine whether an occurrence of the predefined expression in the input audio is a result of an utterance of the predefined expression by a user.

    Cyclically variable signal delays for acoustic echo cancellation
    9.
    发明授权
    Cyclically variable signal delays for acoustic echo cancellation 有权

    公开(公告)号：US09787825B1

    公开(公告)日：2017-10-10

    申请号：US14788032

    申请日：2015-06-30

    Applicant: Amazon Technologies, Inc.

    Inventor： Robert Ayrapetian ,  Arnaud Jean-Louis Charton ,  Yuwen Su ,  Michael Alan Pogue

    IPC: H04M9/08 ,  H04M3/00

    CPC classification number: H04M3/002 ,  H04B3/20

    Abstract: A multi-channel audio communication system is configured to receive highly correlated input audio signals, generated as an example by multiple microphones at a far-end site. Each input audio signal is cyclically stepped through a range of discrete delay amounts, between upper and lower limits, using a step size that is a fraction of the sample period of the input audio signals. Delay cycles applied to the different input audio signals are configured to have different phases, thereby reducing the inter-signal correlation of the input audio signals. The delayed input audio signals are then played by loudspeakers. Microphone output, which may contain sound generated by the loudspeakers, is then subjected to multi-channel acoustic echo cancellation.

    Multichannel acoustic echo cancellation with unique individual channel estimations
    10.
    发明授权
    Multichannel acoustic echo cancellation with unique individual channel estimations 有权
    具有独特的单个通道估计的多通道声学回声消除

    公开(公告)号：US09554210B1

    公开(公告)日：2017-01-24

    申请号：US14750540

    申请日：2015-06-25

    Applicant: Amazon Technologies, Inc.

    Inventor： Robert Ayrapetian ,  Michael Alan Pogue ,  Kenneth Edgar Hild, II

    IPC: H04B3/20 ,  H04R3/00

    CPC classification number: H04R3/002 ,  G10L21/0208 ,  G10L2021/02082 ,  H04M9/082 ,  H04R3/02

    Abstract: A multi-channel echo cancellation system that dynamically adapts to changes in acoustic conditions. The system does not require a sequence of “start-up” tones to determine the impulse responses. Rather, the adaptive filters approximate estimated transfer functions for each channel. A secondary adaptive filter adjusts cancellation to adapt to changes in the actual transfer functions over time after the adaptive filters have been trained, even if the reference signals are not unique relative to each other.

    Abstract translation: 多声道回声消除系统，动态适应声学条件的变化。 该系统不需要一系列“启动”音来确定脉冲响应。 相反，自适应滤波器近似估计每个信道的传递函数。 辅助自适应滤波器调整取消以适应自适应滤波器已被训练之后随时间推移的实际传递函数的变化，即使参考信号彼此不是唯一的。

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