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About Adaptive Multi-Rate
AMR (Adaptive Multi-Rate) is an audio data compression scheme optimized for speech coding. AMR was adopted as the standard speech codec by 3GPP and is now widely used in GSM. It uses link adaptation to select from 1 of 8 different bitrates based on link conditions.
AMR is also a file format for storing spoken audio using the AMR codec. Many modern mobile telephone handsets allow to store short recordings in the AMR format, and some commercial programs convert between this and other formats such as MP3. In AMR the sampling frequency is 8 kHz/16-bit. |
Supported by converters
Convertability