计算机专业英语输入和输出市公开课获奖课件

1、5CHAPTERInput and output（输入和输出）computing ESSENTIALS 1第1页第1页Competencies（能力）Input devicesDigitizingOutput devicesMultifunctional devicesTelephonyTerminalscomputing ESSENTIALS 2第2页第2页Input（输入）Data or instructionsDirectly from userFrom other sourcesInput deviceHardware to provide input to computercompu

2、ting ESSENTIALS 3第3页第3页Input Devices（输入设备）KeyboardsPointing devicesScannersImage capture devicesAudio capturecomputing ESSENTIALS 4第4页第4页Keyboards（键盘）Most common input deviceCharacters, numbers, symbols converted to electrical signalTypewriter keyboard, numeric keypad, special keysNavigation keysFun

3、ction keysWindows keycomputing ESSENTIALS 5第5页第5页Keyboards（键盘）Toggle keysTurns a feature on or offCaps LockCombination keysHeld down in combination with another keyControl key, Alt keycomputing ESSENTIALS 6第6页第6页Pointing Devices（定点设备）Control a pointer on the monitorUsed to select buttons, menus, lin

4、ks MouseMost common pointing deviceMechanicalOpticalWirelesscomputing ESSENTIALS 7第7页第7页Pointing Devices （定点设备）Trackball(轨迹球)Move roller ball with thumbTouch surface(触摸板)Move finger across surface of padTap to selectPointing stick (触摸杆)Middle of keyboardMove with fingercomputing ESSENTIALS 8第8页第8页Po

5、inting Devices （定点设备）Joystick(操纵杆)Popular for computer gamesUser grips stick to maneuverTouch screen (触摸屏)Special monitorScreen layer with crisscrossed beams of infrared lightSelect by touching screen directlycomputing ESSENTIALS 9第9页第9页Scanning Devices（扫描设备）Copy data from a sourceTypes of scannersO

6、ptical scanner Bar code readersCharacter and Mark recognitioncomputing ESSENTIALS 10第10页第10页Optical Scanners（光电扫描仪）Copy text or imagesCan be displayed, printed, or storedTypes of optical scannersFlatbed scannerSource placed on glass surfaceImage scanned from belowPortable scannerHandheld device that

7、 slides across sourcecomputing ESSENTIALS 11第11页第11页Bar Code Readers（条形码阅读器）Photoelectric scannerRead bar codesAlternating black & white vertical barsUniversal Product Code (UPC)Seen in grocery stores, retail storescomputing ESSENTIALS 12第12页第12页Character & Mark Recognition（字符和标志辨认）Magnetic-ink char

8、acter recognition (MICR)Reads magnetically encoded charactersOptical-character recognition (OCR) Reflects light off special preprinted charactersOptical-mark recognition (OMR)Senses presence or absence of markscomputing ESSENTIALS 13第13页第13页Image Capturing Devices（图像捕获设备）Create or capture original i

9、mages (图像/影像创建或捕获)Digital camera (数码摄像机)Image recorded digitally to memoryDigital video cameras(数码照相机)Capture motionWebcams(网络照相)Capture images for broadcast on Internetcomputing ESSENTIALS 14第14页第14页Digitizing Devices（数字化设备）Capture sketches, maps, drawingsFlat surface, writing deviceTypesGraphics t

10、abletsSpecial tablet, stylusDigital notepadsRegular paper, pencomputing ESSENTIALS 15第15页第15页Audio-Input Devices（音频输入设备）Convert sound into digital formatVoice recognition systemOperate computer by voice commandDictationMicrophone, sound card, softwareDiscrete Continuouscomputing ESSENTIALS 16第16页第16

11、页Voice Recognition Systems Types（声音辨认系统类型）Recognize individual words based on sound Discrete-speech recognitionCannot distinguish same-sound wordsContinuous-speech recognitionCan distinguish same-sound wordsEvaluates context of wordscomputing ESSENTIALS 17第17页第17页Output（输出）Processed data from a comp

12、uterText, graphics, photos, audio, videoCommon output devicesMonitorPrinterPlotterVoicecomputing ESSENTIALS 18第18页第18页Monitors（监视器）Most frequently used output deviceSize is measured by diagonal of screenCommon sizes: 15, 17, 19, 21 inches Clarity is indicated by resolutionMeasured in pixelsMore pixe

13、ls = better claritycomputing ESSENTIALS 19第19页第19页Monitor Standards（监视器规格）Resolution capabilities indicated by a monitors standardSuper Video Graphics Array (SVGA)Extended Graphics Array (XGA)Super Extended Graphics Array (SXGA)Ultra Extended Graphics Array (UXGA)computing ESSENTIALS 20第20页第20页Monit

14、or Types（监视器类型）Cathode-Ray Tubes (CRT)Most commonFlat-panel monitorsPassive-matrixActive-matrixeBook readersData projectorsHigh-definition television (HDTV) computing ESSENTIALS 21第21页第21页Printers（打印机）Produces hard copy outputInk-jet printerSprays droplets of inkLaser printerLaser produced imagesThe

15、rmal printerHeated element produce image on heat sensitive papercomputing ESSENTIALS 22第22页第22页Other Printers（其它打印机）Dot-matrixSeries of pins on print headInexpensive, not high qualityPhoto printerPrint photo-quality images from digital camerasPlotterMaps, architectural drawingsHigh quality, larger s

16、ized outputcomputing ESSENTIALS 23第23页第23页Audio Output Devices（音频输出设备）Translate computer data into understandable soundsMP3 filesComponentsSound cardSpeaker system or headphonescomputing ESSENTIALS 24第24页第24页Combination Input/Output Devices（输入输出联合设备）Devices are combined into one deviceSave roomSpeci

17、alized applicationsFax machineMultifunctional deviceTelephonyTerminalscomputing ESSENTIALS 25第25页第25页Fax Machine（传真机）Facsimile transmission machineSends and receives images across telephone linesFax/modem boardGive computer same capabilitycomputing ESSENTIALS 26第26页第26页Multifunctional Device（多功效设备）C

18、ombinesScannerPrinterFax machineCopying machineCost effectiveSaves spacePopular in small offices or homecomputing ESSENTIALS 27第27页第27页Telephony（电话）Uses Internet rather than traditional communication linesRequiresInternet telephoneInternetSpecial service providercomputing ESSENTIALS 28第28页第28页Terminals（终端设备）Devices connected to serversInput and outputTypesDumb terminalI