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1、...../n...../DesigningRoomLightingForVideoconferencingThenewDesignGuidefromIESNAistheclosestthingproAVhastoaninternationalstandardforvideoconferencinglightingdesign.Source:PROAVMagazinePublicationdate:December1,2005ByTimCape,CTS-D20/20Whiletheultimategoalin
2、videoconferencingisgoodinteractivitybetweennear-andfar-endrooms,onecommonlightingdesignproblemcanbesummedupinaquestionthat'sremainedconstantthroughouttheevolutionofvideoconferencingtechnology:Howcanyouprovidegood,comfortablelightingtooptimizethecameraandvid
3、eocodecoperationinanarchitecturalenvironmentratherthaninastudio?Althoughit'safairlysimplequestion,theanswercanbequitecomplicated.Theremustbesomelightintheroomofthespaceyou'redesigningjustforthecameratoproduceanimage,butmakingthatimagelookgoodwhilemaintainin
4、gagoodprojectedvideoimagecanbeeasiersaidthandone.Ontopofjustgettingthecameratoproduceadecentimage,youalsohavetobeconcernedaboutwhatthecodecwilldotothatimage(particularlyatlowbitrates),puttingmore20/20constraintsonnotjustthelightingdesignbutalsotheinteriorde
5、signoftheroomitself—onceagaingoingbeyondthetenetsofabasicAVsystem.Upuntilnow,AVprofessionalshaven'thadmuchconsistentguidanceonvideoconferencingroomlightingdesign,butthenewdesignguide,offeredbytheIlluminatingEngineeringSocietyofNorthAmerica(IESNA),givesthema
6、nauthoritativeplacetostart.ThenewdesignguideIndevelopmentsince2002,the“VideoconferencingLightingDesignGuide,”DG-17-05,isnowavailableforpurchasethroughtheIESNAwebsite(..iesna.org).Itincludesawiderangeofrecommendedcriteriaandgeneralrecommendationsforapproache
7、stolightingforvideoconferencingfacilities.It'sspecificallyorientedtowardsmall-tomid-sizedvideoconferencingroomswithasinglecameraaxis(fromdisplaystoseatedparticipants).Itdoesn'tspecificallycover20/20dual-axisroomsthatincludeapresenternearthedisplaysorlargerf
8、acilities,thoughmuchofthecriteriacanbeappliedtothiswiderrangeofrooms.TheGuideisintendedtosomeextentfordesignersbothwithandwithoutabackgroundinlightingdesign.TheolddesignproblemBeforeansweringthequestio