ITU G.711.1:2008
ITU G.711.1:2008 Wideband Embedded Extension For G.711 Pulse Code Modulation Specifies a G.711 embedded wideband speech and audio coding algorithm operating at 64, 80 and 96 kbit/s.
Table of Contents
1Scope2References
3Definitions
4Abbreviationsandacronyms
5Conventions
6Generaldescriptionofthecoder
6.1Encoder
6.2Decoder
6.3Codermodes
6.4Bitallocation
6.5Algorithmicdelay
6.6Computationalcomplexityandstoragerequirements
6.7Coderdescription
6.8Transcodingbetweendifferentmodes,andlegacyG.711
7Functionaldescriptionoftheencoder
7.1Pre-processinghigh-passfilter
7.2AnalysisQMF
7.3Lower-bandencoding
7.4MDCT
7.5Higher-bandencoding(Layer2)
8Functionaldescriptionofthedecoder
8.1Embeddedlower-bandPCMdecoder
8.2Higher-banddecoder(Layer2)
8.3InverseMDCTandoverlap-add
8.4Lower-bandFERC
8.5Higher-bandFERC
8.6SynthesisQMF
8.7Noisegate
9Descriptionofthetransmittedparameterindices
10Bit-exactdescriptionoftheG.711.1codec
10.1Useofthesimulationsoftware
10.2Organizationofthesimulationsoftware
AnnexA-Floating-pointimplementation
A.1Algorithmicdescription
A.2ANSICcode
AnnexB-G.711.1usageinH.245
B.1Scope
B.2PacketstructureforG.711.1frames
B.3G.711.1capabilitydefinitionsforH.245
B.4InteroperabilitywithG.711
AppendixI-Lower-bandpostfilteringforR1mode
I.1WindowingandFFT
I.2PSDofthequantizationnoise
I.3Postfiltercomputation
I.4Timedomainpostfiltering(timeOLSwithinterpolation)
I.5Amplitudemodificationcontrol
I.6Bit-exactdescriptionofthepostfilterElectronic
attachment-Floating-pointreferenceimplementation-
Associatedtestvectors