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Adaptive Multi-Rate audio codec - Wikipedia
https://en.m.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_codec#:~:text=The%20Adaptive%20Multi-Rate%20%28AMR%2C%20AMR-NB%20or%20GSM-AMR%29%20audio,the%20standard%20speech%20codec%20by%203GPP%20in%20
AMR, Adaptive Multi-Rate Speech Codec
https://www.loc.gov/preservation/digital/formats/fdd/fdd000254.shtml
Format Description for AMR -- Audio data compression scheme optimized for speech coding, adopted in October 1998 as the standard speech codec by 3GPP (3d Generation Partnership Project) and now widely used in GSM (Global System for Mobile Communications). The AMR bit rates of 12.2, 10.2, 7.95, 7.40, 6.70, 5.90, 5.15 and 4.75 kb/s are based on frames …
AMR - Adaptive Multi-Rate Codec File
https://docs.fileformat.com/audio/amr/
The file with .amr extension is an audio data format relevant to Adaptive Multi-Rate audio codec; consists of a multi-rate narrowband speech codec which encodes narrowband signals at 4.75-12.2 kbit/s bit rate with toll quality speech starting at 7.4 kbit/s; uses link adaptation to select from one of eight different bit rates based.
How To Fix Amr-nb Codec – Bashogist
https://bashogist.com/en/amr-nb-codec/
Adaptive Multi-Rate Audio Codec (AMR or amr-nb GSM-AMR) is an audio print format optimized for speech encoding. The AMR codec language is a huge multi-rate narrowband codec language that encodes narrowband signals (200-3400 Hz) with variable bitrates from 4.75 to 12.2 kbps, and quality over long distances [3 ] starting at 7.4 kbps.
GSM Audio Codec: Vocoder: AMR, CELP etc .. » …
https://www.electronics-notes.com/articles/connectivity/2g-gsm/audio-codecs-vocoders-amr-celp.php
GSM Audio Codec / Vocoder Audio / voice codecs and vocoders convert the voice signals required to be transmitted over a GSM link into a compact digital format. Voice codec technologies used with GSM include LPC-RPE, EFR, Full Rate, Half Rate, AMR codec and AMR-WB codec & CELP, ACELP, VSELP, speech codec technologies.
Amr Codec - CNET Download
https://download.cnet.com/s/amr-codec/
Amr Codec free download - Media Player Codec Pack, IDT High Definition Audio CODEC, Codec Decoder Pack, and many more programs
Web audio codec guide - Web media technologies | MDN
https://developer.mozilla.org/en-US/docs/Web/Media/Formats/Audio_codecs
AMR is a narrowband codec, encoding only the frequencies between 200 Hz and 3,400 Hz at bit rates typically around 7.4 kbps, while G.722 is a wideband codec that expands the audio bandwidth to 50 Hz to 7,000 Hz at much higher bit rates—usually 64 kbps.
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