Is a standard ACELP vocoder adapted by the 3rd Generation Partnership Project (3GPP). It is an Adaptive Multi Rate-Narrow Band (AMR-NB) speech codec. This vocoder is used mainly in 3rd generation mobile telephony devices to compress toll-quality speech at 8000 samples/second. GSM-AMR codec has eight basic bit rates, 12.2, 10.2, 7.95, 7.40, 6.70, 5.90, 5.15 and 4.75 Kbit/s

Features

• Eight coding rates in range of 4.75 to 12.2 kbps
• Sampling rate 8 kHz
• Full 3GPP TS 26.073 compliance
• 16-bit linear signal input
• C-callable program interface
• Multi-channel capable
• Demo available for target and PC
• Fully portable ANSI C code

Applications

• Communication Devices
• VoIP
• Telephony

List of supported platforms:

• Texas Instruments C64/C67, DaVinci
• ARM9E, ARM11 (Linux, Android 2.2, iOS)
  
• Marvell Sheeva, Kirkwood, Armada
  
• x86 (MS Windows, Linux, Mac OS X)

GSM AMR-NB is delivered with fully automated IntegrIT Testing Environment (ITE) for target platform based on reference ITU-T vectors set along with extended IntegrIT proprietary vectors and methods. Evaluation version for for PC and your target is available upon request.