公开(公告)号：WO2023014738A1

公开(公告)日：2023-02-09

申请号：PCT/US2022/039205

申请日：2022-08-02

Applicant: ZOOM VIDEO COMMUNICATIONS, INC.

Inventor： RAO, Yu

IPC: G10L21/0316 ,  H03G9/00 ,  H04M3/56 ,  H04R27/00 ,  G10L21/0216 ,  H03G7/002 ,  H03G7/007 ,  H03G9/005 ,  H04M3/18 ,  H04M3/568

Abstract: Disclosed are systems and methods for a frontend capture module of a video conferencing application, which can modify an input signal, received from a microphone device to match predetermined signal characteristics, such as voice signal level and expected noise floor. An Input stage, a suppression module and an output stage amplify the voice signal portion of the input signal and suppress the noise signal of input signal to predetermined ranges. The input stage selectively applies gains defined by a gain table, based on signal level of the input signal. The suppression module selectively applies a suppression gain to the input signal based on presence or absence of voice signal in the input signal. The output stage further amplifies the input signal in portions having a voice signal and applies a gain table to maintain a consistent noise floor.

公开(公告)号：WO2021247135A1

公开(公告)日：2021-12-09

申请号：PCT/US2021/025692

申请日：2021-04-05

Applicant: MICROSOFT TECHNOLOGY LICENSING, LLC

Inventor： KUIVALAINEN, Jani Samuli ,  MIDDLETON, Eric Lee

IPC: H03G3/32 ,  H03G7/00 ,  H03G9/18 ,  H03G9/00 ,  G06F3/165 ,  G10L19/02 ,  G10L25/51 ,  H03G3/3005 ,  H03G7/002 ,  H03G7/007 ,  H03G9/005

Abstract: Techniques are described herein that are capable of adaptively modulating audio content based on background noise. For instance, a loudness difference between a loudness of the audio content and a loudness of the background noise is determined. The loudness of the audio content is compared to an upper loudness threshold. A modulation is selected from multiple modulations based on the loudness difference and/or the comparison. Subsequent outputted audio content is modulated using the selected modulation.