计算机专业英语输入和输出公开课一等奖优质课大赛微课获奖课件.pptx

computing ESSENTIALS 5 5CHAPTERInput and output（输入和输出）输入和输出）computing ESSENTIALS 1第1页第1页Competencies（能力）能力）Input devicesDigitizingOutput devicesMultifunctional devicesTelephonyTerminalscomputing ESSENTIALS 2第2页第2页Input（输入）输入）lData or instructionslDirectly from userlFrom other sourceslInput devicelHardware to provide input to computercomputing ESSENTIALS 3第3页第3页Input Devices（输入设备）输入设备）lKeyboardslPointing deviceslScannerslImage capture deviceslAudio capturecomputing ESSENTIALS 4第4页第4页Keyboards（键盘）键盘）lMost common input devicelCharacters,numbers,symbols converted to electrical signallTypewriter keyboard,numeric keypad,special keyslNavigation keyslFunction keyslWindows keycomputing ESSENTIALS 5第5页第5页Keyboards（键盘）键盘）lToggle keyslTurns a feature on or offlCaps LocklCombination keyslHeld down in combination with another keylControl key,Alt keycomputing ESSENTIALS 6第6页第6页Pointing Devices（定点设备）定点设备）lControl a pointer on the monitorlUsed to select buttons,menus,links lMouselMost common pointing devicelMechanicallOpticallWirelesscomputing ESSENTIALS 7第7页第7页Pointing Devices（定点设备）定点设备）lTrackball(轨迹球)lMove roller ball with thumblTouch surface(触摸板)lMove finger across surface of padlTap to selectlPointing stick(触摸杆)lMiddle of keyboardlMove with fingercomputing ESSENTIALS 8第8页第8页Pointing Devices（定点设备）定点设备）lJoystick(操纵杆)lPopular for computer gameslUser grips stick to maneuverlTouch screen(触摸屏)lSpecial monitorlScreen layer with crisscrossed beams of infrared lightlSelect by touching screen directlycomputing ESSENTIALS 9第9页第9页Scanning Devices（扫描设备）扫描设备）lCopy data from a sourcelTypes of scannerslOptical scanner lBar code readerslCharacter and Mark recognitioncomputing ESSENTIALS 10第10页第10页Optical Scanners（光电扫描仪）光电扫描仪）lCopy text or imageslCan be displayed,printed,or storedlTypes of optical scannerslFlatbed scannerlSource placed on glass surfacelImage scanned from belowlPortable scannerlHandheld device that slides across sourcecomputing ESSENTIALS 11第11页第11页Bar Code Readers（条形码阅读器）条形码阅读器）lPhotoelectric scannerlRead bar codeslAlternating black&white vertical barslUniversal Product Code(UPC)lSeen in grocery stores,retail storescomputing ESSENTIALS 12第12页第12页Character&Mark Recognition（字符和标志辨认）字符和标志辨认）lMagnetic-ink character recognition(MICR)lReads magnetically encoded characterslOptical-character recognition(OCR)lReflects light off special preprinted characterslOptical-mark recognition(OMR)lSenses presence or absence of markscomputing ESSENTIALS 13第13页第13页Image Capturing Devices（图像捕获设备）图像捕获设备）lCreate or capture original images(图像/影像创建或捕获)lDigital camera(数码摄像机)lImage recorded digitally to memorylDigital video cameras(数码照相机)lCapture motionlWebcams(网络照相)lCapture images for broadcast on Internetcomputing ESSENTIALS 14第14页第14页Digitizing Devices（数字化设备）数字化设备）lCapture sketches,maps,drawingslFlat surface,writing devicelTypeslGraphics tabletslSpecial tablet,styluslDigital notepadslRegular paper,pencomputing ESSENTIALS 15第15页第15页Audio-Input Devices（音频输入设备）音频输入设备）lConvert sound into digital formatlVoice recognition systemlOperate computer by voice commandlDictationlMicrophone,sound card,softwarelDiscrete lContinuouscomputing ESSENTIALS 16第16页第16页Voice Recognition Systems Types（声音辨认系统类型）声音辨认系统类型）lRecognize individual words based on sound lDiscrete-speech recognitionlCannot distinguish same-sound wordslContinuous-speech recognitionlCan distinguish same-sound wordslEvaluates context of wordscomputing ESSENTIALS 17第17页第17页Output（输出）输出）lProcessed data from a computerlText,graphics,photos,audio,videolCommon output deviceslMonitorlPrinterlPlotterlVoicecomputing ESSENTIALS 18第18页第18页Monitors（监视器）监视器）lMost frequently used output devicelSize is measured by diagonal of screenlCommon sizes:15,17,19,21 inchesl Clarity is indicated by resolutionlMeasured in pixelslMore pixels=better claritycomputing ESSENTIALS 19第19页第19页Monitor Standards（监视器规格）监视器规格）lResolution capabilities indicated by a monitors standardlSuper Video Graphics Array(SVGA)lExtended Graphics Array(XGA)lSuper Extended Graphics Array(SXGA)lUltra Extended Graphics Array(UXGA)computing ESSENTIALS 20第20页第20页Monitor Types（监视器类型）监视器类型）lCathode-Ray Tubes(CRT)lMost commonlFlat-panel monitorslPassive-matrixlActive-matrixleBook readerslData projectorslHigh-definition television(HDTV)computing ESSENTIALS 21第21页第21页Printers（打印机）打印机）lProduces hard copy outputlInk-jet printerlSprays droplets of inklLaser printerlLaser produced imageslThermal printerlHeated element produce image on heat sensitive papercomputing ESSENTIALS 22第22页第22页Other Printers（其它打印机）其它打印机）lDot-matrixlSeries of pins on print headlInexpensive,not high qualitylPhoto printerlPrint photo-quality images from digital cameraslPlotterlMaps,architectural drawingslHigh quality,larger sized outputcomputing ESSENTIALS 23第23页第23页Audio Output Devices（音频输出设备）音频输出设备）lTranslate computer data into understandable soundslMP3 fileslComponentslSound cardlSpeaker system or headphonescomputing ESSENTIALS 24第24页第24页Combination Input/Output Devices（输入输出联合设备）输入输出联合设备）lDevices are combined into one devicelSave roomlSpecialized applicationslFax machinelMultifunctional devicelTelephonylTerminalscomputing ESSENTIALS 25第25页第25页Fax Machine（传真机）传真机）lFacsimile transmission machinelSends and receives images across telephone lineslFax/modem boardlGive computer same capabilitycomputing ESSENTIALS 26第26页第26页Multifunctional Device（多功效设备）多功效设备）lCombineslScannerlPrinterlFax machinelCopying machinelCost effectivelSaves spacelPopular in small offices or homecomputing ESSENTIALS 27第27页第27页Telephony（电话）电话）lUses Internet rather than traditional communication lineslRequireslInternet telephonelInternetlSpecial service providercomputing ESSENTIALS 28第28页第28页Terminals（终端设备）终端设备）lDevices connected to serverslInput and outputlTypeslDumb terminallIntelligent terminallNetwork terminallInternet terminalcomputing ESSENTIALS 29第29页第29页A Look to the Future（前景）前景）lBrain-machine interfacelSignal interceptor in brain translates into action on the computerlRestore mobility to paralyzedlProsthetic limbslVirtual realitycomputing ESSENTIALS 30第30页第30页