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Adaptive Multi-Rate audio codec - Wikipedia
https://en.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_codec#:~:text=The%20Adaptive%20Multi-Rate%20%28AMR%2C%20AMR-NB%20or%20GSM-AMR%29%20audio,with%20toll%20quality%20speech%20starting%20at%207.4%20kbit%2Fs.
AMR Audio Encoding - CodeProject
https://www.codeproject.com/articles/332109/amr-audio-encoding
AMR, Adaptive Multi-Rate Speech Codec
https://www.loc.gov/preservation/digital/formats/fdd/fdd000254.shtml
AMR, Adaptive Multi-Rate Speech Codec: Description: 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).
AMR Player, Free AMR audio player and AMR to MP3 or …
http://www.amrplayer.com/
Adaptive Multi-Rate (AMR) is an audio data compression scheme optimized for speech coding. AMR was adopted as the standard speech codec by 3GPP in October 1998 and is now widely used in GSM and UMTS. It uses link adaptation to select from one of eight different bit rates based on link conditions.
Android AMR-WB encoding issue - Stack Overflow
https://stackoverflow.com/questions/61432575/android-amr-wb-encoding-issue
MediaCodec mc = MediaCodec.createEncoderByType(MediaFormat.MIMETYPE_AUDIO_AMR_WB); MediaFormat mf = MediaFormat.createAudioFormat(MediaFormat.MIMETYPE_AUDIO_AMR_WB, 4000, 1); mf.setInteger(MediaFormat.KEY_BIT_RATE, 6600); mc.configure(mf, null, null, …
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.
AMR to MP3 (Online & Free) — Convertio
https://convertio.co/amr-mp3/
Adaptive Multi Rate. This format was originally intended for voice compression and is able to change the bit rates of encoded audio data. AMR is actively used for encoding and decoding voice while its being transmitted over network channels. The format allows one to consider network capacity and adapt it to channel loads.
Comparison of audio coding formats - Wikipedia
https://en.wikipedia.org/wiki/Comparison_of_audio_coding_formats
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