Table of Contents
1Scope
2Normativereferences
3Definitions,symbolsandabbreviations
3.1Definitions
3.2Symbols
3.3Abbreviations
4Outlinedescription
4.1Functionaldescriptionofaudioparts
4.2Preparationofspeechsamples
4.3Principlesoftheadaptivemultiratewideband
speechencoder
4.4Principlesoftheadaptivemultiratespeechdecoder
4.5Sequenceandsubjectiveimportanceofencoded
parameters
5Functionaldescriptionoftheencoder
5.1Preprocessing
5.2Linearpredictionanalysisandquantization
5.3Perceptualweighting
5.4Open-looppitchanalysis
5.5Impulseresponsecomputation
5.6Targetsignalcomputation
5.7Adaptivecodebook
5.8Algebraiccodebook
5.9Quantizationoftheadaptiveandfixedcodebook
gains
5.10Memoryupdate
5.11High-bandgaingeneration
6Functionaldescriptionofthedecoder
6.1Decodingandspeechsynthesis
6.2High-passfiltering,up-scalingandinterpolation
6.3Highfrequencyband
7Detailedbitallocationoftheadaptivemulti-rate
widebandcodec
8Homingsequences
8.1Functionaldescription
8.2Definitions
8.3Encoderhoming
8.4Decoderhoming
9VoiceActivityDetector(VAD)
9.1VADSymbols
9.2Functionaldescription
10MandatoryAMR-WBcodecmodesforthespeechtelephony
servicein3GPP
BIBLIOGRAPHY Abstract
Describes the high quality Adaptive Multi-rate Wideband (AMR-WB) encoder and decoder that is primarily intended for 7 kHz bandwidth speech signals.
