Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Adaptive Multi-Rate Codec(also: AMR, AMR Codec, AMR-NB)
- A family of audio codecs used in mobile telephony to encode voice for transmission. AMR-NB (narrowband) operates at 300-3,400 Hz with bit rates from 4.75-12.2 kbps, while AMR-WB (wideband, also called HD Voice) extends to 50-7,000 Hz at 6.6-23.85 kbps. AMR-WB is adopted by 3GPP…
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