CodecPro OPUS Codec
IETF standard codec

OPUS is standardized by the Internet Engineering Task Force (IETF) as RFC 6716, which incorporates technology from Skype's SILK codec and Xiph.Org's CELT codec. The OPUS codec can operate in constant bitrate (CBR) or variable bitrate (VBR). OPUS is designed to encode speech or music, in mono or in multi-channel. The OPUS codec bitrate, audio bandwidth and frame size can be adjusted dynamically. The OPUS codec also includes good packet loss robustness and packet loss concealment (PLC).

The memory and CPU details are generic Standard specifications, for more detail and information about CodecPro's OPUS optimisation, please contact us at

Bandwidth 50 - (4K to 24K) Hz
Standardized IETF 2010
Technology CELP, MDCT, CELT
Bit rate 6 - 510 kbps
Delay (msec) variable
Frame size (msec) CELP:10 – 60 ; MDCT:2.5 – 20
Lookahead (msec) 5 ; 2.5
Quality Narrowband to Fullband & Music
Complexity (MIPS) 70
ROM (bytes)  
RAM (bytes)  

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2162 Laurier E. Montreal, QC Canada, H2H 1C2 Montreal, Canada
Phone: +1.514.916.3663