Adaptive Multi-Rate Audio
From Just Solve the File Format Problem
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|wikidata={{wikidata|Q4676210}} | |wikidata={{wikidata|Q4676210}} | ||
|locfdd={{LoCFDD|fdd000254}} | |locfdd={{LoCFDD|fdd000254}} | ||
| − | |mimetype={{mimetype|audio/ | + | |mimetype={{mimetype|audio/AMR}} |
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==File Identification== | ==File Identification== | ||
The first 5 bytes of an AMR is the hex values {{magic|2321414D52}} or ascii <code>#!AMR</code> | The first 5 bytes of an AMR is the hex values {{magic|2321414D52}} or ascii <code>#!AMR</code> | ||
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| + | ===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)] | ||
== Software == | == Software == | ||
Revision as of 23:18, 23 October 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
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File Identification
The first 5 bytes of an AMR is the hex values 2321414D52 or ascii #!AMR
