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1,Chapter32Multimedia:Audio,Video,SpeechSynthesisandRecognition,Outline32.1Introduction32.2AddingBackgroundSoundswiththeBGSOUNDElement32.3AddingVideowiththeIMGElementsDYNSRCProperty32.4AddingAudioorVideowiththeEMBEDElement32.5UsingtheWindowsMediaPlayerActiveXControl32.6MicrosoftAgentControl32.7RealPlayerActivexControl32.8EmbeddingVRMLinaWebpage32.9UsingStreamingMedia,2,32.1Introduction,MultimediaPerformanceintensiveInternetbandwidthandprocessorspeedCarefullydesignmultimedia-basedWebapplicationsMultimediafileslargeSometechnologiesrequirecompletedownloadStreamingmediaAudioandvideofilescanbeginplayingwhilefilesaredownloading,3,32.2AddingBackgroundSoundswiththeBGSOUNDElement,BGSOUNDelementSpecifictoIEPlaceinHEADsectionEndingtagoptionalFourpropertiesSRCURLofaudioclipLOOP-1(default)loopsuntiluserbrowsesdifferentWebpageorclicksStopbuttonPositiveintegerspecifiesnumberoftimestoloopNegativevalues(otherthan1)andzeroplaycliponce,4,32.2AddingBackgroundSoundswiththeBGSOUNDElement,Fourproperties(continued)BALANCERangefrom10000to10000-10000:soundonlyfromleftspeaker10000:soundonlyfromrightspeaker0:default,soundbalancedbetweenleftandrightspeakersCannotbesetviascriptingVOLUMEBetween10000(minimumvolume)and0(maximumvolume)Default:0,1.1EmbedaudiofilewithBGSOUNDelement1.2DefinefunctionchangePropertiestoupdatetousersinput1.3UseparseInttoconvertinput,7,DemonstratingbackgroundaudiowithBGSOUND,8,32.3AddingVideowiththeIMGElementsDYNSRCProperty,IncludevideowithIMGelementUseDYNSRC(dynamicsource)attributeinsteadofSRCDYNSRCattributespecifictoIESTARTpropertyfileopen:videostartsplayingassoonasitloadsmouseover:videoplayswhenuserpositionsmouseovervideo,1.1EmbedvideousingDYNSRCpropertyofIMGelement1.2SetSTARTtomouseovertohavevideoplaywhenuserfirstpositionscursorovervideo,10,PlayingavideowiththeIMGelementsDYNSRCproperty,11,32.4AddingAudioorVideowiththeEMBEDElement,EMBEDelementEmbedsmediaclipinWebpageAllowsgraphicaluserinterfacetogiveusercontroloverclipBrowseroftenincludesGUIofplayerregisteredtohandlemediatypeWindowsMediaPlayerHIDDENpropertyPreventGUIfrombeingdisplayedGUIdisplayedbydefaultLOOPpropertyLoopclipforever,EmbedaudioclipusingEMBEDelement,14,EmbeddingaudiowiththeEMBEDelement,EmbedvideoclipusingEMBEDelement,16,EmbeddingvideowiththeEMBEDelement,17,32.5UsingtheWindowsMediaPlayerActiveXControl,WindowsMediaPlayerActiveXcontrolAccesstorangeofmediaformatsEmbedusingOBJECTelementParameters:FileNameSpecifiesfilecontainingmediaclipAutoStartBooleanforwhetherclipshouldstartplayingwhenitloadsShowControlsBooleanforwhethercontrolsshouldbedisplayedLoopBooleanforwhetherclipshouldloopinfinitelyMethods:PlayPause,1.1DefinefunctiontoggleVideotoplay/pausevideo1.2EmbedWindowsMediaPlayerActiveXcontrolforvideoclipusingOBJECTelement1.3Specifyparametersforcontrol,1.4EmbedaudioclipusingWindowsMediaPlayerActiveXcontrolwithOBJECTelement1.5Createbuttontoallowusertoplay/pausevideo,20,UsingtheOBJECTelementtoembedtheWindowsMediaPlayerActiveXcontrolinaWebpage,21,32.6MicrosoftAgentControl,MicrosoftAgentControlInteractiveanimatedcharactersFourpredefined:PeedytheParrotGenieMerlinRobbytheRobotMouseandkeyboardinteractionsSpeech(iftext-to-speechengineinstalled)LernoutandHauspieTruVoicetext-to-speechengineSpeechrecognition(ifspeechrecognitionengineinstalled)CreatecharacterswithMicrosoftCharacterEditorandMicrosoftLinguisticSoundEditingTool,1.1EmbedMicrosoftAgentusingOBJECTelement1.2EmbedLernoutandHauspieTruVoiceTTSengineusingOBJECTelement1.2.1CODEBASEspecifiesURLtodownloadcontrolandversionofcontrol1.3ScriptPeedytointeractwithuser,1.4DefinefunctionloadAgenttoloadMicrosoftAgentcharacter1.5LoadvariousanimationsforPeedy1.5.1UseGetmethodtodownloadstatesforcharacter,1.6CreateTABLEofitemsforPeedytodescribe,28,DemonstratingMicrosoftAgentandtheLernoutandHauspieTruVoiceTTSengine,29,DemonstratingMicrosoftAgentandtheLernoutandHauspieTruVoiceTTSengine,30,DemonstratingMicrosoftAgentandtheLernoutandHauspieTruVoiceTTSengine,31,32.6MicrosoftAgentControl,MicrosoftAgentActiveXcontrolsEmbeddedintoWebpagesCODEBASEpropertySpecifiesURLtodownloadnecessarysoftwareCharacterscollectionLoadmethodCharactermethodCharacterobjectGetmethod,Enhancepreviousexampletoincludevoicerecognition1.1IncludeMicrosoftSpeechRecognitionEnginewithOBJECTtag,Optionalwordsorphrasesenclosedinbrackets,1.2AddvoicecommandswithCommandscollectionsAddmethod,1.3CommandsobjectspropertiesCaption,VoiceandVisible,40,MicrosoftVoiceRecognitionEngineandMicrosoftAgent,41,MicrosoftVoiceRecognitionEngineandMicrosoftAgent,42,MicrosoftVoiceRecognitionEngineandMicrosoftAgent,43,32.6UsingMicrosoftAgentControl,OthereventsforMicrosoftAgentcontrol,44,32.6UsingMicrosoftAgentControl,OtherpropertiesofCharactersobject,45,32.7RealPlayerActiveXControl,EMBEDRealPlayerAddstreamingaudioinWebpageAttributes:TYPEMIMEtypeofembeddedfileWIDTHandHEIGHTSpecifydimensionsofcontrolAUTOSTARTBooleanforwhetheraudioshouldstartplayingwhenpageloadsCONTROLSSpecifieswhichcontrolsavailabletouserPlaybutton,Pausebutton,volumecontrol,etc.SRCLocationofstreamingaudio,1.1UseJavaScripttodynamicallychangestation,1.2InsertRealPlayerusingEMBEDelement,48,EmbeddingRealPlayerinaWebpage,49,32.8EmbeddingVRMLinaWebpage,VRMLVirtualRealityModelingLanguageMarkuplanguageforspecifying3DobjectsandscenesPurelytextVRMLfilesknownasworldsEndin.wrlfileextensionUseEMBEDelementtoplace.wrlfileIEandNetscapehavedownloadableplug-insforVRMLControlsallowyoutorotateworld,walkaroundorchangedirection,1.UseEMBEDelementtoincludeVRMLfileinaWebpage,51,EmbeddingVRM
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