ITU G.168:2012
ITU G.168:2012 Digital Network Echo Cancellers Specifies the characteristics of an echo canceller, including the requirement for in-band tone disabling and other control mechanisms.
Table of Contents
1Scope2References
3Termsanddefinitions
4Abbreviationsandacronyms
5Testsignals
6Characteristicsofechocancellers
7Characteristicsofanechocancellertonedisabler
8Non-linearprocessors(NLPs)foruseinechocancellers
AnnexA-Descriptionofanechocancellerreferencetone
disabler
AnnexB-Descriptionofareferencenon-linearprocessor
AnnexC-Compositesourcesignalsfortestingofspeechecho
cancellers-Signal,descriptionandanalysis
AnnexD-Echo-pathmodelsfortestingofspeechechocancellers
AppendixI-Guidanceforapplicationofechocancellers
AppendixII-Measurementmethodsforcharacteristicsof
echopaths
AppendixIII-Multipletailcircuits
AppendixIV-Guidelinesontheuseofparametersfortestingecho
cancellers
AppendixV-Listoflowspeedmodemsforoptionalusewith
TestNo.14
AppendixVII-Guidanceonechocancellerorientationin
conferencebridgeapplications
Bibliography