Interaction DevicesUser CommunicationPointing Device TasksSpeech TechnologyDiscrete Word RecognitionWhen should you use it?Speech Store and ForwardWhen to use computer generated speech?1Interaction DevicesCIS 375Bruce R. MaximUM-Dearborn2User Communication•Keyboard remains the user’s primary input device•Most GUI systems expect pointing devices as well–Light pen –Touch screen –Mouse –Trackball –Joystick –Graphics tablet –Touch pad –Foot controls –Gloves –Eye movement detectors3Pointing Device Tasks•Selection •Positioning objects •Orienting objects on screen •Path tracing •Quantify •Text entry/editing (not easily done)4Speech Technology•Discrete word recognition •Continuous speech recognition •Speech store and forward •Speech generation5Discrete Word Recognition•90 to 98% reliability for small vocabulary •Usually requires speaker dependent training •Most people would rather type than dictate6When should you use it?•Speakers hands are busy •Mobility required •Speakers eyes are occupied •Harsh or cramped conditions prevent use of key board7Speech Store and Forward•Voice mail type technology •Video games •Low cost •Resource intensive8When to use computer generated speech?•Message is simple •Message is short •Message will not be referred to later •Message deals with events in time •Message requires immediate response •Visual communications channels are overloaded •Environment lighting is bad •User must move around •User subjected to high G forces or lack of
View Full Document
Unlocking...