Opus codec
2012-09-16 21:37:11 
阿炯
Opus codec是用来在因特网上传输互动的视频和音频的。它是由IETF Codec工作组协同Skype的SILK codec和Xiph.Org的CELT codec设计的。
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.
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.
技术细节
Opus codec 被设计来处理大部分的交互式音频和视频包括，Voice over IP，网络会议，游戏中聊天，甚至远程音乐会。它可以在不同的网络带宽环境中自适应。目前的功能有：
Sampling rates from 8 to 48 kHz
Bit-rates from 6 kb/s 510 kb/s (*)
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 (*)
Frame sizes from 2.5 ms to 60 ms (*)
Good loss robustness and packet loss concealment (PLC)
Floating point and fixed-point implementation
最新版本：0.1
官方主页：http://opus-codec.org/