Zoom Video Communications, Inc.
TWO-STAGE DIGITAL AUTOMATIC GAIN CONTROL

Last updated:

Abstract:

Disclosed are systems and methods for automatic control of gain in audio and video conferencing applications to maintain a predetermined and stable audio level. In one embodiment, a first stage applies a first stage gain based on a long-term estimate of signal level, while a second stage gain, based on a short-term estimate of signal level assists the first stage gain to achieve a target level. Some embodiments of long-term level estimation utilize statistical analysis of a buffer to validate or arrive at a more accurate long-term signal level estimate.

Status:
Application
Type:

Utility

Filling date:

11 Jan 2022

Issue date:

11 Aug 2022