Meta Platforms, Inc.
Advanced comfort noise techniques

Abstract:

Various of the disclosed embodiments enable managing and augmenting "comfort noise" during a network call, such as a Voice Over Internet Protocol (VOIP) connection. Particularly, traditional systems typically send machine-generated comfort noise, or a command to generate comfort noise at the recipient, on a channel separate from the conversation content. Some embodiments reduce this overhead by embedding the comfort noise in the media stream. In other embodiments, audio encoding is stopped at the source when the speaker falls silent and the recipient, after detecting the cessation, will generate white noise at its end. These approaches may be used in conjunction with a determination of the available bandwidth and channel parameters.