Adaptive Multi-Rate Wideband (AMR-WB) is a patented wideband speech audio coding standard developed based on Adaptive Multi-Rate encoding, using similar methodology as Algebraic Code Excited Linear Prediction (ACELP). 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. The AMR-WB format has the following parameters:

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dbo:abstract
  • Adaptive Multi-Rate Wideband (AMR-WB) is a patented wideband speech audio coding standard developed based on Adaptive Multi-Rate encoding, using similar methodology as Algebraic Code Excited Linear Prediction (ACELP). 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 (AMR-WB). 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. The AMR-WB format has the following parameters: * Frequency bands processed: 50-6400 Hz (all modes) plus 6400-7000 Hz (23.85 kbit/s mode only) * Delay frame size: 20 ms * Look ahead: 5ms * AMR-WB codec employs a bandsplitting filter; the one-way delay of this filter is 0.9375 ms * Complexity: 38 WMOPS, RAM 5.3KWords * Voice activity detection, Discontinuous Transmission, Comfort Noise Generator * Fixed point: Bit-exact C * Floating point: under work. A common file extension for AMR-WB file format is .awb. There also exists another storage format for AMR-WB 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. 3GP also allows use of AMR-WB bit streams for stereo sound. (en)
  • Le G.722.2 est une norme de compression audio de l'UIT-T (Union internationale des télécommunications). Ce protocole est également normalisé par l'ETSI sous le nom AMR-WB (Adaptive Multi Rate - Wide Band).Ce codec est appelé « large bande » car il permet une bande passante plus grande que celle des téléphones classiques (fixes et mobiles). * Fréquence d'échantillonnage : 16 000 Hz * Bande passante audio : 50 à 7000 Hz * Débit sur le réseau : de 6,60 à 23,85 kbit/s (fr)
  • AMR-WB(Adaptive Multi-Rate Wideband)は、Adaptive Multi-Rate(AMR)をベースとするマルチレートの広帯域音声符号化方式で、GSMやW-CDMA 方式の第三世代携帯電話で利用される。AMR-WB と区別するため、従来の AMR は AMR-NB(Adaptive Multi-Rate Narrowband)と呼ばれることもある。 同じ仕様は ITU-T が勧告した広帯域音声符号化方式 G.722.2 でも使用されている。 (ja)
dbo:wikiPageExternalLink
dbo:wikiPageID
  • 1079509 (xsd:integer)
dbo:wikiPageRevisionID
  • 742502748 (xsd:integer)
dbp:extension
  • .awb
dbp:genre
  • Audio
dbp:mime
  • audio/amr-wb, audio/3gpp
dbp:name
  • Adaptive Multi-Rate Wideband
dbp:standard
  • ITU-T G.722.2
dct:subject
http://purl.org/linguistics/gold/hypernym
rdf:type
rdfs:comment
  • Le G.722.2 est une norme de compression audio de l'UIT-T (Union internationale des télécommunications). Ce protocole est également normalisé par l'ETSI sous le nom AMR-WB (Adaptive Multi Rate - Wide Band).Ce codec est appelé « large bande » car il permet une bande passante plus grande que celle des téléphones classiques (fixes et mobiles). * Fréquence d'échantillonnage : 16 000 Hz * Bande passante audio : 50 à 7000 Hz * Débit sur le réseau : de 6,60 à 23,85 kbit/s (fr)
  • AMR-WB(Adaptive Multi-Rate Wideband)は、Adaptive Multi-Rate(AMR)をベースとするマルチレートの広帯域音声符号化方式で、GSMやW-CDMA 方式の第三世代携帯電話で利用される。AMR-WB と区別するため、従来の AMR は AMR-NB(Adaptive Multi-Rate Narrowband)と呼ばれることもある。 同じ仕様は ITU-T が勧告した広帯域音声符号化方式 G.722.2 でも使用されている。 (ja)
  • Adaptive Multi-Rate Wideband (AMR-WB) is a patented wideband speech audio coding standard developed based on Adaptive Multi-Rate encoding, using similar methodology as Algebraic Code Excited Linear Prediction (ACELP). 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. The AMR-WB format has the following parameters: (en)
rdfs:label
  • Adaptive Multi-Rate Wideband (en)
  • G.722.2 (fr)
  • AMR-WB (ja)
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