With that decision, an increasing number of applications were being developed to natively work with and export AMR files, gradually setting the AMR file format as the standard for storing audio on mobile devices. In October 1998, AMR was adopted by the 3GPP organization as the standard audio codec for the 3G mobile system specification, making Adaptive Multi-Rate encoding dominant in VoIP and mobile communications. The AMR codec is based primarily on the Algebraic Code-Excited Linear Prediction algorithm (ACELP), developed by the VoiceAge Corporation. The format was originally introduced and popularized by the Ericsson corporation, but can now be found on every modern mobile device. AMR (Adaptive Multi-Rate) is a compressed audio file format used for storing audio data encoded with the patented Adaptive Multi-Rate audio codec.
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