公开(公告)号：US20210120332A1

公开(公告)日：2021-04-22

申请号：US17001854

申请日：2020-08-25

Applicant: Amazon Technologies, Inc.

Inventor： Yuancheng Luo ,  Wontak Kim ,  Mihir Dhananjay Shetye

IPC: H04R1/40 ,  H04R25/00 ,  H04S3/00 ,  G10L19/008 ,  H04R5/02

Abstract: A system configured to improve spatial coverage of output audio and a corresponding user experience by performing upmixing and loudspeaker beamforming to stereo input signals. The system can perform upmixing to the stereo (e.g., two channel) input signal to extract a center channel and generate three-channel audio data. The system may then perform loudspeaker beamforming to the three-channel audio data to enable two loudspeakers to generate output audio having three distinct beams. The user may interpret the three distinct beams as originating from three separate locations, resulting in the user perceiving a wide virtual sound stage despite the loudspeakers being spaced close together on the device.

公开(公告)号：US11128953B2

公开(公告)日：2021-09-21

申请号：US17001854

申请日：2020-08-25

Applicant: Amazon Technologies, Inc.

Inventor： Yuancheng Luo ,  Wontak Kim ,  Mihir Dhananjay Shetye

IPC: H04R1/40 ,  H04R25/00 ,  H04S3/00 ,  G10L19/008 ,  H04R5/02

Abstract: A system configured to improve spatial coverage of output audio and a corresponding user experience by performing upmixing and loudspeaker beamforming to stereo input signals. The system can perform upmixing to the stereo (e.g., two channel) input signal to extract a center channel and generate three-channel audio data. The system may then perform loudspeaker beamforming to the three-channel audio data to enable two loudspeakers to generate output audio having three distinct beams. The user may interpret the three distinct beams as originating from three separate locations, resulting in the user perceiving a wide virtual sound stage despite the loudspeakers being spaced close together on the device.

公开(公告)号：US10764676B1

公开(公告)日：2020-09-01

申请号：US16573472

申请日：2019-09-17

Applicant: Amazon Technologies, Inc.

Inventor： Yuancheng Luo ,  Wontak Kim ,  Mihir Dhananjay Shetye

IPC: H04R1/40 ,  H04R25/00 ,  H04S3/00 ,  G10L19/008 ,  H04R5/02

Abstract: A system configured to improve spatial coverage of output audio and a corresponding user experience by performing upmixing and loudspeaker beamforming to stereo input signals. The system can perform upmixing to the stereo (e.g., two channel) input signal to extract a center channel and generate three-channel audio data. The system may then perform loudspeaker beamforming to the three-channel audio data to enable two loudspeakers to generate output audio having three distinct beams. The user may interpret the three distinct beams as originating from three separate locations, resulting in the user perceiving a wide virtual sound stage despite the loudspeakers being spaced close together on the device.

公开(公告)号：US11830471B1

公开(公告)日：2023-11-28

申请号：US17007681

申请日：2020-08-31

Applicant: Amazon Technologies, Inc.

Inventor： Mohamed Mansour ,  Wontak Kim ,  Yuancheng Luo

IPC: H04R3/00 ,  G10K11/36 ,  G06T15/06

CPC classification number: G10K11/36 ,  G06T15/06 ,  H04R3/005 ,  G10K2210/505 ,  H04R2203/12

Abstract: Disclosed are techniques for performing ray-based acoustic modeling that models scattering of acoustic waves by a surface of a device. The acoustic modeling uses two parameters, a room response representing acoustics and geometry of a room and a device response representing acoustics and geometry of the device. The room response is determined using ray-based acoustic modeling, such as ray tracing. The device response can be measured in an actual environment or simulated and represents an acoustic response of the device to individual acoustic plane waves. The device applies a superposition of the room response and the plane wave scattering from the device response to determine acoustic pressure values and generate microphone audio data. The device can estimate room impulse response (RIR) data using data from the microphones, and can use the RIR data to perform audio processing such as sound equalization, acoustic echo cancellation, audio beamforming, and/or the like.