Opus is a totally open, royalty-free, highly versatile audio codec. Opus is unmatched for interactive speech and music transmission over the Internet, but also intended for storage and streaming applications. It is standardized by the Internet Engineering Task Force (IETF) as RFC 6716 which incorporated technology from Skype's SILK codec and Xiph.Org's CELT codec.
Technology
Opus can handle a wide range of audio applications, including Voice over IP, videoconferencing, in-game chat, and even remote live music performances. It can scale from low bit-rate narrowband speech to very high quality stereo music. Supported features are: More Info »
Bit-rates from 6 kb/s to 510 kb/s
Sampling rates from 8 kHz (narrowband) to 48 kHz (fullband)
Frame sizes from 2.5 ms to 60 ms
Support for both constant bit-rate (CBR) and variable bit-rate (VBR)
Audio bandwidth from narrowband to full-band
Support for speech and music
Support for mono and stereo
Support for up to 255 channels (multistream frames)
Dynamically adjustable bitrate, audio bandwidth, and frame size
Good loss robustness and packet loss concealment (PLC)
Floating point and fixed-point implementation
You can read the full specification, including the reference implementation, in RFC 6716.
Link to official Opus Interactive Audio Codec site
Official Website
Features
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Category
Audio & Music
Tags
audio-codec ietf
Opus Interactive Audio Codec (sometimes referred to as Opus) was added by Apaosha in
Sep 2012 and the latest update was made in
Sep 2018. The list of alternatives was updated Mar 2016 There is a history of all activites on
Opus Interactive Audio Codec in our Activity Log.
It's possible to update the information on Opus Interactive Audio Codec or report it as discontinued, duplicated or spam.
