Adaptive Multi-Rate Wideband is a patented wideband speech audio coding standard developed based on Adaptive Multi-Rate encoding, using similar methodology as Algebraic Code Excited Linear Prediction. AMR-WB provides improved speech quality due to a wider speech bandwidth of 50–7000 Hz compared to narrowband speech coders which in general are optimized for POTS wireline quality of 300–3400 Hz. AMR-WB was developed by Nokia and VoiceAge and it was first specified by 3GPP. AMR-WB is codified as G.722.2, an ITU-T standard speech codec, formally known as Wideband coding of speech at around 16 kbit/s using Adaptive Multi-Rate Wideband. G.722.2 AMR-WB is the same codec as the 3GPP AMR-WB. The corresponding 3GPP specifications are TS 26.190 for the speech codec and TS 26.194 for the Voice Activity Detector. This video is targeted to blind users.
![The Adaptive Multirate Wideband Speech Codec Amr Wb The Adaptive Multirate Wideband Speech Codec Amr Wb](https://slideplayer.com/slide/7264783/24/images/2/Contents+of+the+presentation.jpg)
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The Adaptive Multi-Rate Wideband (AMR-WB) speech codec algorithm has been selected for wideband speech coding in wireless and wireline.