User guide

60

VQmon/HDcalculatesqualitymetricsintheseburstandgapstates,andthencombinesthem
togeneratetheoverallqualityscoreonuserexperi ence.Thesecalculationsarebasedonthe
resultsofnumerouss ubjectivevoice/videoqualityanalysisteststhatindicatethereisnotan
instantaneouschangeinperceivedqualitywhenatransitionbetw
eenthegapandburststates
occurs,butratherthattheperceivedqualityexponentially“decays”fromonelevelto
another.Forexample,a100‐millisecondburstof“noise”ismuchlessannoyingthana10
secondburstof“noise”.
Figure2‐8illustratestheVQmon4‐stateMarkovmodel.TheVQmon4‐stateMarkovmodelis
define
dashavingthefollowingstatesandassociatedtransitions:
Table2‐1.VQmon4‐stateMarkovmodelstatetransitiondescriptions


