(AMR / AMR-NB / GSM-AMR)
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*the adaptive multi-rate audio codec is an ‘audio compression format’ optimized for ‘speech coding’*
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(‘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 1 of 8 different ‘bit rates’ based on ‘link conditions’)
(‘AMR’ is also a ‘file format’ for storing ‘spoken audio’ using the ‘AMR codec’)
(many ‘modern mobile telephone handsets’ can store short ‘audio recordings’ in the ‘AMR format’, and both ‘free’ and ‘proprietary’ programs exist (see ‘software support’) to convert between this and other formats, although ‘AMR’ is a ‘speech format’ and is unlikely to give ideal results for other ‘audio’)
(the common ‘filename extension’ is .amr)
(there also exists another ‘storage format’ for ‘AMR’ that is suitable for ‘applications’ with more advanced demands on the ‘storage format’, like ‘random access’ or ‘synchronization’ with ‘video’)
(this format is the 3GPP-specified 3GP container format based on ‘ISO base media file format’)
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(used by ‘blackberry’ to record ‘voice memos’)
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*👨🔬🕵️♀️🙇♀️*SKETCHES*🙇♂️👩🔬🕵️♂️*
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👈👈👈☜*“AUDIO FILE FORMATS”* ☞ 👉👉👉
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥🔥