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}} |
|pronom={{PRONOM|fmt/356}} | |pronom={{PRONOM|fmt/356}} | ||
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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 == | ||
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* [https://www.online-convert.com/file-format/amr AMR info and sample] | * [https://www.online-convert.com/file-format/amr AMR info and sample] | ||
* [https://gerrit.pixelexperience.org/plugins/gitiles/frameworks_base/+/a539807a7c50948eec99b27e2d4d05da208ae3f1/media/tests/contents/media_api/music/test_amr_ietf.amr Sample AMR] | * [https://gerrit.pixelexperience.org/plugins/gitiles/frameworks_base/+/a539807a7c50948eec99b27e2d4d05da208ae3f1/media/tests/contents/media_api/music/test_amr_ietf.amr Sample AMR] | ||
| − | * | + | * {{DexvertSamples|audio/amr}} |
== References == | == References == | ||
<references/> | <references/> | ||
Latest revision as of 04:08, 28 December 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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[edit] File Identification
The first 5 bytes of an AMR is the hex values 2321414D52 or ascii #!AMR
