2013icme-background proportion adaptive lagrange multiplier selection method for surveilICME A背景比例自适应Lagrange乘数选择上监视方法.pdf

ABACKGROUNDPROPORTIONADAPTIVELAGRANGEMULTIPLIERSELECTION

METHODFORSURVEILLANCEONHEVC

LongZhao,XianguoZhang,YonghongTian,RonggangWang,TiejunHuang

NationalEngineeringLaboratoryforTechnology,PekingUniversity,Beijing100871,

{yhtian,tjhuang}@

derivedtherelationshipbetweentheLagrangemultiplier,

thedistortionandtherateinthefollowingequation,

Intherecentcodingstandards,theselectionof

(1)

Lagrangemultiplieriscrucialtoachievetrade-offbetween

thechoicesoflow-distortionandlow-bitratepredictionwhererepresentedtheLagrangemultiplier,denotedthe

modes.Forsurveillancecoding,therate-distortiondistortionandwasthecodingrate.Theyfinallyderived

analysisshowsthat,alargerLagrangemultipliershouldbethecomputationmethodoftheLagrangemultiplierinthe

usedifthebackgroundinacodingunittookalargerfollowingequation,

proportion.Therefore,amodifiedLagrangemultipliermight(2)

bterforrate-distortionoptimization.Toaddressthiswhererepresentedthequantvalueandrepresenteda

problem,weperformanin-depthanalys