公开(公告)号：US10388298B1

公开(公告)日：2019-08-20

申请号：US15585486

申请日：2017-05-03

Applicant: Amazon Technologies, Inc.

Inventor： Ramya Gopalan ,  Carlo Murgia ,  Sridhar Pilli

IPC: G10L21/0208 ,  H04M9/08 ,  G10L21/0232 ,  H04B3/23 ,  H04B3/466 ,  G10L21/00 ,  H04B3/20

Abstract: A system configured to improve speech quality by performing residual echo suppression (RES). The system may detect when double talk is present in a voice conversation and may use different attenuation parameters based on a frequency of audio data. The system may perform RES on the audio data using a low attenuation value for low frequencies and a high attenuation value for high frequencies and determine that double talk is present when a difference in energy level between the low frequencies and the high frequencies is below a threshold. If double talk is present, the RES may generate output audio data using a low attenuation value for low frequencies and a high attenuation value for high frequencies. If double talk is not present, the RES may generate output audio data using a high attenuation value for low frequencies and a high attenuation value for high frequencies.