GSM-AMR (AMR-NB) Vocoder
Last updated: July 7, 2005
Company:
- Gao Research
Description:
- 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. GAO´s algorithm utilizes the Algebraic Code Excited Linear Prediction (ACELP) technique for all bit rates.
FEATURES:
-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.
Product Properties
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