GSM-AMR (AMR-NB) Vocoder

GSM-AMR (AMR-NB) Vocoder

GSM-AMR is a standard 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. GAO's 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. The algorithm utilizes the Algebraic Code Excited Linear Prediction (ACELP) technique for all bit rates.

Features of GSM-AMR (AMR-NB) Vocoder

• Adaptive Multi-Rate ranges from 4.75 kbit/s to 12.2 kbit/s.
• Optimized C or Assembly code.
• Low program and data memory requirements.

For a complete list of GAO's Speech Vocoders Software products, please see GAO's Speech Vocoders List.

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  Soft Modems
  

  Fax Software
  

  Vocoders/Speech
  

  Telephony
  

  Fax over IP
  

  Video Codecs
  

  VoIP
  

  V2 over IP Stacks
  

  V2 over IP Solutions
  

  Video Phone Solution
  

  Supported Platforms

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  Custom Software
  

  Firmware Integration
  

  Protocols
  

  RTOS

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