公开(公告)号：US10887710B1

公开(公告)日：2021-01-05

申请号：US15132058

申请日：2016-04-18

Applicant: Amazon Technologies, Inc.

Inventor： Preethi Parasseri Narayanan

IPC: H04R29/00 ,  G10L15/065 ,  G10L17/10 ,  H04R3/04

Abstract: A voice-activated computing device configured to transmit a pilot tone and then capture or receive a signal, which corresponds to the pilot tone, reflected from within the environment containing the voice-activated computing device. The voice-activated computing device, or some other computing system or device, analyzes the received signal in order to determine analyze one or more characteristics present within the signal, i.e. noise, echo, etc. Based upon the analysis, models for signal processing can be determined, selected and/or altered. Future signals received by the voice-activated computing device can be processed with such models. The analysis can also allow for the models to be dynamically updated and for models to be dynamically created.

公开(公告)号：US12087318B1

公开(公告)日：2024-09-10

申请号：US17963652

申请日：2022-10-11

Applicant: Amazon Technologies, Inc.

Inventor： Michael Alan Pogue ,  Kavitha Velusamy ,  Preethi Parasseri Narayanan ,  Tony David ,  Philip Ryan Hilmes

IPC: G10L25/00 ,  G06F3/16 ,  H04R3/00 ,  H04R27/00

CPC classification number: G10L25/00 ,  G06F3/167 ,  H04R3/005 ,  H04R27/00 ,  H04R2227/003 ,  H04R2227/005 ,  H04R2227/007

Abstract: A distributed voice controlled system has a primary assistant and at least one secondary assistant. The primary assistant has a housing to hold one or more microphones, one or more speakers, and various computing components. The secondary assistant is similar in structure, but is void of speakers. The voice controlled assistants perform transactions and other functions primarily based on verbal interactions with a user. The assistants within the system are coordinated and synchronized to perform acoustic echo cancellation, selection of a best audio input from among the assistants, and distributed processing.

公开(公告)号：US10515653B1

公开(公告)日：2019-12-24

申请号：US16114993

申请日：2018-08-28

Applicant: Amazon Technologies, Inc.

Inventor： Michael Alan Pogue ,  Kavitha Velusamy ,  Preethi Parasseri Narayanan ,  Tony David ,  Philip Ryan Hilmes

IPC: G10L25/00

Abstract: A distributed voice controlled system has a primary assistant and at least one secondary assistant. The primary assistant has a housing to hold one or more microphones, one or more speakers, and various computing components. The secondary assistant is similar in structure, but is void of speakers. The voice controlled assistants perform transactions and other functions primarily based on verbal interactions with a user. The assistants within the system are coordinated and synchronized to perform acoustic echo cancellation, selection of a best audio input from among the assistants, and distributed processing.

公开(公告)号：US11501792B1

公开(公告)日：2022-11-15

申请号：US17135570

申请日：2020-12-28

Applicant: Amazon Technologies, Inc.

Inventor： Michael Alan Pogue ,  Kavitha Velusamy ,  Preethi Parasseri Narayanan ,  Tony David ,  Philip Ryan Hilmes

IPC: G10L25/00 ,  H04R3/00 ,  G06F3/16 ,  H04R27/00

Abstract: A distributed voice controlled system has a primary assistant and at least one secondary assistant. The primary assistant has a housing to hold one or more microphones, one or more speakers, and various computing components. The secondary assistant is similar in structure, but is void of speakers. The voice controlled assistants perform transactions and other functions primarily based on verbal interactions with a user. The assistants within the system are coordinated and synchronized to perform acoustic echo cancellation, selection of a best audio input from among the assistants, and distributed processing.

公开(公告)号：US12230279B1

公开(公告)日：2025-02-18

申请号：US17396535

申请日：2021-08-06

Applicant: Amazon Technologies, Inc.

Inventor： Preethi Parasseri Narayanan

IPC: G10L17/24 ,  G06F21/32 ,  G10L15/22 ,  G10L17/06 ,  G10L17/22

Abstract: Techniques for authenticating users at devices that interact with the users via voice input. For instance, the described techniques may allow a voice-input device to safely verify the identity of a user by engaging in a back-and-forth conversation. The device or another device coupled thereto may then verify the accuracy of the responses from the user during the conversation, as well as compare an audio signature associated with the user's responses to a pre-stored audio signature associated with the user. By utilizing multiple checks, the described techniques are able to accurately and safely authenticate the user based solely on an audible conversation between the user and the voice-input device.

公开(公告)号：US09966086B1

公开(公告)日：2018-05-08

申请号：US15184765

申请日：2016-06-16

Applicant: Amazon Technologies, Inc.

Inventor： Kurt Wesley Piersol ,  Preethi Parasseri Narayanan ,  Robert Ayrapetian ,  Arnaud Jean-Louis Charton ,  Gabe Beddingfield ,  Michael Alan Pogue ,  Yuwen Su

IPC: G10L21/0232 ,  G10L21/0264 ,  G10L21/0208 ,  G10L21/0216

CPC classification number: G10L21/0232 ,  G10K11/175 ,  G10L21/0208 ,  G10L21/0264 ,  G10L2021/02082 ,  G10L2021/02166 ,  H04R3/02

Abstract: A system may be configured to interact with a user through speech using a first and second audio devices, where the first device produces audio and the second device captures audio. The second device may be configured to perform acoustic echo cancellation with respect to a microphone signal based on a reference signal provided by the first device. The reference and microphone signals may have the same nominal signal rates. However, the signal rates may drift from each other over time. In order to synchronize the rates of the signals, each of the devices maintains a signal index. The second device compares the values of the two signal indexes over time to determine rate differences between the reference and microphone signals and then corrects for the rate differences.