Opus is one of two voice codecs selected as mandatory to implement in WebRTC (the other codec is G.711).

As a codec, Opus is capable of supporting narrowband and up to stereo fullband while using low bitrates with high resiliency.

Opus is a relatively new voice codec defined in the IETF RFC 6716.


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The WebRTC Glossary is an ongoing project where users can learn more about WebRTC related terms. It is maintained by Tsahi Levent-Levi of BlogGeek.me.

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