Opus codec
概览
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。
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
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