Opus audio codec, functioning as a completely open and royalty-free audio codec, showcases remarkable versatility. It stands as an unparalleled solution for facilitating interactive transmission of both speech as well as music via the Internet. Nevertheless, its scope extends beyond that, encompassing storage and streaming scenarios.
Opus Audio Codec
Notably, Opus has achieved standardization under the jurisdiction of the Internet Engineering Task Force (IETF) through RFC 6716. This standardization amalgamates elements from Skype’s SILK codec and Xiph.Org’s CELT codec. You can also find a comparison to the audio codecs in Handbrake compression rates on here. Likewise you can also see the Kodi Media Player on here.
In terms of its technological prowess, Opus admirably caters to an extensive array of audio applications. These span from Voice over IP and videoconferencing to in-game chat as well as remote live music performances. Impressively, Opus’s capabilities span the spectrum, accommodating everything from low bitrate narrowband speech to top-tier stereo music quality. Likewise see also the HEIF and HEVC media extensions as well as the LAME MP3 Encoder.
Opus Audio Codec Features
This remarkable codec boasts a multitude of supported features:
- Bitrate Variability: It supports a broad range of bitrates, spanning from 6 kb/s up to 510 kb/s.
- Sampling Rate Flexibility: Opus encompasses sampling rates that range from 8 kHz for narrowband applications to 48 kHz for fullband scenarios.
- Frame Size Options: With frame sizes ranging from 2.5 ms up to 60 ms, Opus can adapt to various demands.
- Bitrate Strategies: It offers support for the constant bitrate (CBR) as well as the variable bitrate (VBR) modes.
- Audio Bandwidth Coverage: Opus can cover audio bandwidths spanning from narrowband to full band.
- Audio Content Inclusion: The codec seamlessly handles both speech and music content.
- Stereo and Mono Support: It adeptly accommodates both mono and stereo audio configurations.
- Multichannel Capability: Opus remarkably supports up to 255 channels, facilitated by multistream frames.
- Dynamic Adjustability: The codec enables real-time adaptability in terms of bitrate, audio bandwidth, and frame size.
- Robustness and Concealment: Opus demonstrates robustness in the face of loss, complemented by effective packet loss concealment (PLC) mechanisms.
- Dual Implementation: It offers both floating-point and fixed-point implementation alternatives.
For comprehensive insights, including the reference implementation, the complete Opus specification is detailed in RFC 6716. Additionally, an up-to-date implementation covering the Opus standard is readily accessible from the downloads page, further reinforcing its position as a dynamic and versatile audio codec. Lastly also see the LameXP on here.