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ID:44057151
大小:196.06 KB
页数:31页
时间:2019-10-18
《ITU-R BT.601-5 STUDIO ENCODING PARAMETERS OF DIGITAL》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、Rec.ITU-RBT.601-51SECTION11B:DIGITALTELEVISIONRECOMMENDATIONITU-RBT.601-5STUDIOENCODINGPARAMETERSOFDIGITALTELEVISIONFORSTANDARD4:3ANDWIDE-SCREEN16:9ASPECTRATIOS(QuestionITU-R206/11)(1982-1986-1990-1992-1994-1995)Rec.ITU-RBT.601-5TheITURadiocommunicationAssembly,consideringa)thatthe
2、reareclearadvantagesfortelevisionbroadcastersandprogrammeproducersindigitalstudiostandardswhichhavethegreatestnumberofsignificantparametervaluescommonto525-lineand625-linesystems;b)thataworldwidecompatibledigitalapproachwillpermitthedevelopmentofequipmentwithmanycommonfeatures,perm
3、itoperatingeconomiesandfacilitatetheinternationalexchangeofprogrammes;c)thatanextensiblefamilyofcompatibledigitalcodingstandardsisdesirable.Membersofsuchafamilycouldcorrespondtodifferentqualitylevels,differentaspectratios,facilitateadditionalprocessingrequiredbypresentproductiontec
4、hniques,andcaterforfutureneeds;d)thatasystembasedonthecodingofcomponentsisabletomeetthesedesirableobjectives;e)thattheco-sitingofsamplesrepresentingluminanceandcolour-differencesignals(or,ifused,thered,greenandbluesignals)facilitatestheprocessingofdigitalcomponentsignals,requiredby
5、presentproductiontechniques,recommendsthatthefollowingbeusedasabasisfordigitalcodingstandardsfortelevisionstudiosincountriesusingthe525-linesystemaswellasinthoseusingthe625-linesystem:1IntroductionThisRecommendationspecifiesmethodsfordigitallycodingvideosignals.Itincludesa13.5MHzsa
6、mplingrateforboth4:3and16:9aspectratioswithperformanceadequateforpresenttransmissionsystems.Analternative18MHzsamplingrateforthose16:9systemswhichrequireproportionatelyhigherhorizontalresolutionisalsospecified.Specificationsapplicabletoanymemberofthisfamilyofstandardsarepresentedfi
7、rst.ThenfollowsinPartAthespecificcharacteristicsfor13.5MHzsamplingandinPartBthespecificcharacteristicsfor18MHzsampling.2Extensiblefamilyofcompatibledigitalcodingstandards2.1Thedigitalcodingshouldallowtheestablishmentandevolutionofanextensiblefamilyofcompatibledigitalcodingstandards
8、.Itshouldbepossibletointer
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