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About: Adaptive Multi-Rate audio codec     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatITU-TRecommendations, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: softwareyago:WikicatComputerFileFormatsyago:Abstraction100002137yago:Advice106671484yago:Communication100033020yago:Format106636806yago:Information106634376yago:Message106598915yago:Proposal107162194yago:Recommendation106671637yago:WikicatITU-TRecommendations New Facet based on Instances of this Class

The Adaptive Multi-Rate (AMR, AMR-NB or GSM-AMR) audio codec is an audio compression format optimized for speech coding. AMR speech codec consists of a multi-rate narrowband speech codec that encodes narrowband (200–3400 Hz) signals at variable bit rates ranging from 4.75 to 12.2 kbit/s with toll quality speech starting at 7.4 kbit/s. AMR was adopted as the standard speech codec by 3GPP in October 1999 and is now widely used in GSM and UMTS. It uses link adaptation to select from one of eight different bit rates based on link conditions.