ITU-T H.Sup1 (05 1999) (英) Application profile - Sign language……

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1、INTERNATIONALTELECOMMUNICATIONUNIONSeriesHTELECOMMUNICATIONSupplement1STANDARDIZATIONSECTOR(05/99)OFITUSERIESH:AUDIOVISUALANDMULTIMEDIASYSTEMSApplicationprofile–Signlanguageandlip-readingreal-timeconversationusinglowbit-ratevideocommunicationITU-TH-seriesRecommendations–Supplement1(Previ

2、ouslyCCITTRecommendations)ITU-TH-SERIESRECOMMENDATIONSAUDIOVISUALANDMULTIMEDIASYSTEMSCharacteristicsoftransmissionchannelsusedforotherthantelephonepurposesH.10–H.19Useoftelephone-typecircuitsforvoice-frequencytelegraphyH.20–H.29Telephonecircuitsorcablesusedforvarioustypesoftelegraphtrans

3、missionorH.30–H.39simultaneoustransmissionTelephone-typecircuitsusedforfacsimiletelegraphyH.40–H.49CharacteristicsofdatasignalsH.50–H.99CHARACTERISTICSOFVISUALTELEPHONESYSTEMSH.100–H.199INFRASTRUCTUREOFAUDIOVISUALSERVICESGeneralH.200–H.219TransmissionmultiplexingandsynchronizationH.220–H

4、.229SystemsaspectsH.230–H.239CommunicationproceduresH.240–H.259CodingofmovingvideoH.260–H.279RelatedsystemsaspectsH.280–H.299SystemsandterminalequipmentforaudiovisualservicesH.300–H.399SupplementaryservicesformultimediaH.450–H.499Forfurtherdetails,pleaserefertoITU-TListofRecommendations.

5、SUPPLEMENT1TOITU-TH-SERIESRECOMMENDATIONSAPPLICATIONPROFILE–SIGNLANGUAGEANDLIP-READINGREAL-TIMECONVERSATIONUSINGLOWBIT-RATEVIDEOCOMMUNICATIONSummarySignlanguageandlip-readingaretwoimportantapplicationareasofvideocommunication.Forthesuccessfultransmissionofthecomponentsofvisuallanguage,ce

6、rtainqualityrequirementsmustbemet.Thissupplementisanapplicationprofiledocumentthatgivesthebackgroundtotherequirementsandoffersaswellguidanceonhowtheserequirementscanbemet.Thepurposeofthissupplementisnottoproposenewvideocodingschemes,butrathertoindicatehowcurrentandfuturevideocodingscheme

7、scanbeappliedtothesetwoareasofapplication,withgoodresults.SourceSupplement1toITU-TH-seriesRecommendationswaspreparedbyITU-TStudyGroup16(1997-2000)andwasapprovedundertheWTSCResolutionNo.5procedureon27May1999.Hseries–Supplement1(05/99)iFOREWORDITU(InternationalTelecommunica