GSM-EFR

In comparison to the GSM Full Rate codec (GSM-FR), GSM-EFR has improved speech quality and better robustness to network impairments. This codec provides one of the rates of AMR.

The VoiceAge GSM-EFR implementation is fully compliant with the ETSI GSM 06.60 Enhanced Full Rate (EFR) speech transcoding specification.

Platforms

CodecLib API (for Intel®/Windows®, Linux/Unix®, Sun Solaris™, Mac OS®)
For implementations of this codec on other platforms, please contact sales@voiceage.com

Technology

	Encoded bandwidth	~ 200-3400 Hz
	Standardized	ETSI 1997
	Coding type	ACELP® (Algebraic Code Excited Linear Prediction)
	Bit rate	12.2 kbps
	Delay (ms): Frame size Lookahead	20 0
	Quality	Toll
	Complexity: MIPS RAM (words)	15-20 4 K

Applications

Digital telephony – Wi-Fi, VoIP, wireless (GSM, GPRS, EDGE)
Audio and videoconferencing
Media players
Media servers
Media gateways
Content creation tools
PDA/handset-hosted applications