公开(公告)号：US12249344B1

公开(公告)日：2025-03-11

申请号：US17853773

申请日：2022-06-29

Applicant: Amazon Technologies, Inc.

Inventor： Christopher Evans ,  Sumit Garg ,  Ameya Agaskar ,  Mohammad Edris Qarghah ,  Zhengping Jin

IPC: G10L25/51 ,  G10L15/08 ,  G10L15/22 ,  G10L19/018

Abstract: Described herein is a system for encoding audio watermarks with frequency extensions to enable enhanced watermark detection. An extended audio watermark may include an existing audio watermark and a duplicate audio watermark, enabling backwards compatibility with existing watermark detection while also enabling enhanced watermark detection with increased accuracy. For example, embedding the extended audio watermark enables (i) limited devices to perform watermark detection to detect the existing audio watermark, and (ii) improved devices to perform enhanced watermark detection to detect the extended audio watermark. As the extended audio watermark includes redundancy in the form of duplicate audio watermark(s), an accuracy of performing enhanced watermark detection is increased relative to detecting the existing audio watermark alone.

公开(公告)号：US11887602B1

公开(公告)日：2024-01-30

申请号：US17547894

申请日：2021-12-10

Applicant: Amazon Technologies, Inc.

Inventor： Brendon Jude Wilson ,  Henry Michael D Souza ,  Cindy Angie Hou ,  Christopher Evans ,  Sumit Garg ,  Ravina Chopra

IPC: G10L15/30 ,  G10L19/02 ,  G10L15/22 ,  G06F3/16 ,  G10L19/018

CPC classification number: G10L15/30 ,  G06F3/165 ,  G06F3/167 ,  G10L15/22 ,  G10L19/018 ,  G10L19/02

Abstract: Techniques for performing audio-based device location determinations are described. A system may send, to a first device, a command to output audio requesting a location of the first device be determined. A second device may receive the audio and send, to the system, data representing the second device received the audio, where the received data includes spectral energy data representing a spectral energy of the audio as received by the second device. The system may, using the spectral energy data, determine attenuation data representing an attenuation experienced by the audio as it traveled from the first device to the second device. The system may generate, based on the attenuation data, spatial relationship data representing a spatial relationship between the first device and the second device, where the spatial relationship data is usable to determine a device for outputting a response to a subsequently received user input.