EVRC operates at three bit rates, depending on the source signal: full rate (8.5 kbps), half rate (4 kbps), and eighth rate (800 bps). The lowest rate is for background noise.
The VoiceAge EVRC (IS-127) implementation is fully compliant with the TIA-EIA-IS-127 technical requirements for an Enhanced Variable Rate Codec for use in wideband spread spectrum (CDMA) systems.
