Adaptive Multi-Rate Audio
From Just Solve the File Format Problem
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===Specifications=== | ===Specifications=== | ||
| − | * [https://datatracker.ietf.org/doc/html/rfc4867 RFC 4867 RTP Payload Format and File Storage Format for the Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate Wideband (AMR-WB) | + | * [https://datatracker.ietf.org/doc/html/rfc4867 RFC 4867 RTP Payload Format and File Storage Format for the Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate Wideband (AMR-WB)] |
== Software == | == Software == | ||
Revision as of 15:52, 21 June 2023
Adaptive Multi-Rate Audio is a narrowband audio compression format optimized for speech. AMR is a codec adopted by 3GPP and used by many mobile systems.[1][2][3] Apple iOS used the format for voice recordings and voicemail, but changed to the CAF in iOS 12.2[4]
See also AMR-WB
Contents |
File Identification
The first 5 bytes of an AMR is the hex values 2321414D52 or ascii #!AMR
