計(jì)算機(jī)專業(yè)英語(yǔ)輸入和輸出市公開(kāi)課獲獎(jiǎng)?wù)n件

1、5CHAPTERInput and output（輸入和輸出）computing ESSENTIALS 1第1頁(yè)第1頁(yè)Competencies（能力）Input devicesDigitizingOutput devicesMultifunctional devicesTelephonyTerminalscomputing ESSENTIALS 2第2頁(yè)第2頁(yè)Input（輸入）Data or instructionsDirectly from userFrom other sourcesInput deviceHardware to provide input to computercompu

2、ting ESSENTIALS 3第3頁(yè)第3頁(yè)Input Devices（輸入設(shè)備）KeyboardsPointing devicesScannersImage capture devicesAudio capturecomputing ESSENTIALS 4第4頁(yè)第4頁(yè)Keyboards（鍵盤）Most common input deviceCharacters, numbers, symbols converted to electrical signalTypewriter keyboard, numeric keypad, special keysNavigation keysFun

3、ction keysWindows keycomputing ESSENTIALS 5第5頁(yè)第5頁(yè)Keyboards（鍵盤）Toggle keysTurns a feature on or offCaps LockCombination keysHeld down in combination with another keyControl key, Alt keycomputing ESSENTIALS 6第6頁(yè)第6頁(yè)P(yáng)ointing Devices（定點(diǎn)設(shè)備）Control a pointer on the monitorUsed to select buttons, menus, lin

4、ks MouseMost common pointing deviceMechanicalOpticalWirelesscomputing ESSENTIALS 7第7頁(yè)第7頁(yè)P(yáng)ointing Devices （定點(diǎn)設(shè)備）Trackball(軌跡球)Move roller ball with thumbTouch surface(觸摸板)Move finger across surface of padTap to selectPointing stick (觸摸桿)Middle of keyboardMove with fingercomputing ESSENTIALS 8第8頁(yè)第8頁(yè)P(yáng)o

5、inting Devices （定點(diǎn)設(shè)備）Joystick(操縱桿)Popular for computer gamesUser grips stick to maneuverTouch screen (觸摸屏)Special monitorScreen layer with crisscrossed beams of infrared lightSelect by touching screen directlycomputing ESSENTIALS 9第9頁(yè)第9頁(yè)Scanning Devices（掃描設(shè)備）Copy data from a sourceTypes of scannersO

6、ptical scanner Bar code readersCharacter and Mark recognitioncomputing ESSENTIALS 10第10頁(yè)第10頁(yè)Optical Scanners（光電掃描儀）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頁(yè)第11頁(yè)Bar Code Readers（條形碼閱讀器）Photoelectric scannerRead bar codesAlternating black & white vertical barsUniversal Product Code (UPC)Seen in grocery stores, retail storescomputing ESSENTIALS 12第12頁(yè)第12頁(yè)Character & Mark Recognition（字符和標(biāo)志辨認(rèn)）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頁(yè)第13頁(yè)Image Capturing Devices（圖像捕獲設(shè)備）Create or capture original i

9、mages (圖像/影像創(chuàng)建或捕獲)Digital camera (數(shù)碼攝像機(jī))Image recorded digitally to memoryDigital video cameras(數(shù)碼照相機(jī))Capture motionWebcams(網(wǎng)絡(luò)照相)Capture images for broadcast on Internetcomputing ESSENTIALS 14第14頁(yè)第14頁(yè)Digitizing Devices（數(shù)字化設(shè)備）Capture sketches, maps, drawingsFlat surface, writing deviceTypesGraphics t

10、abletsSpecial tablet, stylusDigital notepadsRegular paper, pencomputing ESSENTIALS 15第15頁(yè)第15頁(yè)Audio-Input Devices（音頻輸入設(shè)備）Convert sound into digital formatVoice recognition systemOperate computer by voice commandDictationMicrophone, sound card, softwareDiscrete Continuouscomputing ESSENTIALS 16第16頁(yè)第16

11、頁(yè)Voice Recognition Systems Types（聲音辨認(rèn)系統(tǒng)類型）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頁(yè)第17頁(yè)Output（輸出）Processed data from a comp

12、uterText, graphics, photos, audio, videoCommon output devicesMonitorPrinterPlotterVoicecomputing ESSENTIALS 18第18頁(yè)第18頁(yè)Monitors（監(jiān)視器）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頁(yè)第19頁(yè)Monitor Standards（監(jiān)視器規(guī)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頁(yè)第20頁(yè)Monit

14、or Types（監(jiān)視器類型）Cathode-Ray Tubes (CRT)Most commonFlat-panel monitorsPassive-matrixActive-matrixeBook readersData projectorsHigh-definition television (HDTV) computing ESSENTIALS 21第21頁(yè)第21頁(yè)P(yáng)rinters（打印機(jī)）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頁(yè)第22頁(yè)Other Printers（其它打印機(jī)）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頁(yè)第23頁(yè)Audio Output Devices（音頻輸出設(shè)備）Translate computer data into understandable soundsMP3 filesComponentsSound cardSpeaker system or headphonescomputing ESSENTIALS 24第24頁(yè)第24頁(yè)Combination Input/Output Devices（輸入輸出聯(lián)合設(shè)備）Devices are combined into one deviceSave roomSpeci

17、alized applicationsFax machineMultifunctional deviceTelephonyTerminalscomputing ESSENTIALS 25第25頁(yè)第25頁(yè)Fax Machine（傳真機(jī)）Facsimile transmission machineSends and receives images across telephone linesFax/modem boardGive computer same capabilitycomputing ESSENTIALS 26第26頁(yè)第26頁(yè)Multifunctional Device（多功效設(shè)備）C

18、ombinesScannerPrinterFax machineCopying machineCost effectiveSaves spacePopular in small offices or homecomputing ESSENTIALS 27第27頁(yè)第27頁(yè)Telephony（電話）Uses Internet rather than traditional communication linesRequiresInternet telephoneInternetSpecial service providercomputing ESSENTIALS 28第28頁(yè)第28頁(yè)Terminals（終端設(shè)備）Devices connected to serversInput and outputTypesDumb terminalI