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Understanding Input and Output Devices: From Keyboards to Voice Recognition

This chapter delves into the various input and output devices that facilitate data entry and output in computing. It covers essential topics such as keyboards, direct-entry input devices like bar code scanners and POS systems, and different terminal types. Additionally, it explains voice recognition systems, monitors, printers, and plotters, detailing their functions and standards. Discover the technology behind traditional input methods and modern advancements shaping the future of user interfaces and digital interaction.

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Understanding Input and Output Devices: From Keyboards to Voice Recognition

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Presentation Transcript

  1. 5 CHAPTER Input and Output

  2. Competencies 1. Keyboards 2. Direct-entry input devices 3. Terminals 4. Voice recognition systems 5. Monitors and their standards 6. Printers and plotters 7. Voice-output devices

  3. Overview • Input and output • Binary language • Output devices do the reverse

  4. Data Entry • Keyboard entry • Direct entry

  5. Data Entry • Point-of-sale (POS) • keyboard • bar scanning • Wand reader • Platform scanner A Point-of-sale transaction

  6. Windows key Traditional keyboard Numeric keypad Function keys Escape key Navigation keys Spacebar

  7. Keyboard Entry • Ctrl, Alt and Shift keys

  8. Keyboard Entry • Terminals • Dumb terminal • Intelligent terminal • Network terminal • Internet terminal

  9. Direct Entry • Machine-readable format • Three categories • Pointing devices • Scanning devices • Voice-input devices

  10. Pointing Devices Traditional keyboard • Mouse • Trackball • Touch-surface • Touch screen

  11. Pointing Devices • Light pen • Digitizer • Digital camera • Digital notebook

  12. Pen-based computer: recording inventory

  13. Scanning Devices • Image scanner • Fax machine • Bar-code readers

  14. Fax Machines • Fax machine • Fax modem cards

  15. Bar-Code Readers • Photoelectric scanners • Bar code

  16. Scanning Devices • Magnetic-ink character recognition (MICR) • Optical-character recognition (OCR) • Optical-mark recognition (OMR)

  17. Voice-Input Devices • Convert speech into digital code • Microphone • Voice recognition systems

  18. Voice Recognition Systems • Continuous speech • Discrete-word

  19. Monitor Standards • VGA • Super VGA or SVGA • XGA

  20. Serial mouse, modem, keyboard Video monitor Cables

  21. Monitors • CRTs • Flat-Panel or LCD • Passive-matrix or dual-scan • Active-matrix • Pixel size

  22. Printers • Ink-jet Printer • Laser Printer

  23. Printers • Thermal Printer • Dot-matrix • Chain printer

  24. Plotters • Pen Plotter • Ink-Jet Plotter • Electrostatic Plotter • Direct Imaging Plotter

  25. Plotters • Direct Imaging Plotter • Electrically heated pins create images on heat-sensitive paper • Expensive paper required • Two-color output only

  26. Voice-Output Devices • Prerecorded vocalized sounds • A sound card and a speaker system

  27. A Look into the Future • Digital TV • Federal Communications Commission • PC/TV

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