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Input & Output

Chapter 5. Input & Output. Overview. Describe Types of Input Identify Types of Pointing Devices Explain How Voice Recognition Works Describe Types of Scanners Identify the Three Output Types Identify Devices For Physical Challenges. Input Device. Hardware to Enter Data & Instructions

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Input & Output

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  1. Chapter 5 Input & Output

  2. Overview • Describe Types of Input • Identify Types of Pointing Devices • Explain How Voice Recognition Works • Describe Types of Scanners • Identify the Three Output Types • Identify Devices For Physical Challenges

  3. Input Device • Hardware to Enter Data & Instructions • Data • Text, Numbers, Images, Audio, Video • Instructions • Programs, Commands, User Responses

  4. Keyboard • Sections • Typing Area • Numeric Keypad • Function Keys • Special Keys • Wired • Uses USB • Wireless • Bluetooth, IrDA

  5. Keyboard • Mobile Devices • Smaller • Fewer Keys • Predictive Text • Predict Word Being Typed as It’s Typed • Allows for Faster Typing

  6. Pointing Devices • Mouse • Fits Under Palm of Hand • Controls Movement of On Screen Pointer • Pointer Shapes Indicate Current Function • Most Widely Used on Desktop Computers • Wired or Wireless

  7. Pointing Devices • Notebooks • Touchpad • Sensitive to Pressure & Motion • Pointing Stick • Shaped Like Pencil Eraser

  8. Pointing Devices • Touch Screen • Touch Sensitive Display • Often Used with Kiosks • Touch Pad

  9. Pointing Devices • Pen • Digital / Stylus • Uses Pressure to Write & Draw • As Legal as Ink Signature

  10. Pointing Devices • Pen • Handwriting Recognition • Translates Handwritten Characters • Graffiti

  11. Step 1. User dictates text into microphone. 10010111010110101100001101 Voice • Recognition Mechanics Step 2. Analog-to-digital converter (ADC) translates sound waves into digital measurements including pitch, volume, silences, and phonemes. Step 4. Software presents user with a list of choices or uses a natural language component to predict most likely match. User may correct any selection made by software. Step 3. Software compares spoken measurements with those in its database to find a match or list of possible matches. yore, your, you’reright, rite, write Matches

  12. Voice • Recognition Challenges • 80% Accuracy • ESL Speakers • Women (High-pitched Voices) • People with Accents • Children

  13. Controllers • Gaming & Simulation • Gamepad • Joystick • Wheel • Light Gun • Dance Pad • Motion-sensing

  14. Smartphone • Navigation Receiver • Keyboard • Microphone • Camera • USB Sync

  15. Digital Camera • Resolution • Sharpness & Clarity of Image • Pixel • Single Point in Electronic Image • More Pixels Results in Better Image Quality

  16. Music • Record • Compose • Mix • Edit

  17. Video • Video Capture • Full-motion Recording into Computer • PC Camera • Record, Edit, & Capture Video • Web Cam • Video Camera Output Displayed on Web • Videoconferencing • Whiteboard

  18. Flatbed Handheld Sheet-fed Drum Scanning • Light-sensing Device • Reads Printed Text & Graphics

  19. Scanning • Image Processing • AKA Imaging • Capture, Store, View, Print, & Edit Images • Convert Paper into Electronic Document • OCR (Optical Character Recognition) • Characters’ Shapes Determined • Converts Into Editable Text • OMR (Optical Mark Recognition) • Reads Hand-drawn Pencil Marks

  20. Scanning • Bar Code • Uses Laser Beam to Read Bar Codes • Vertical Lines / Spaces of Different Widths • Symbology • 1/300 v. 1/3,000,000

  21. Scanning • RFID • Reads Tag Via Radio Waves • Uses • Manage Inventory • Toll Payments • Gauge Tire Pressure • Airline Baggage • Magnetic Stripe • Reads Magnetic Stripe on Back of Card

  22. Mobile Data Collection • Collect Data Where Transaction Occurs • Capture Data Directly From Source • Data Transfer • Wireless / Docking Station • Uses • Grocery Stores • Restaurants • Warehouses • Outdoors

  23. Mobile Data Collection • Advantages: • Saves Time • Lowers Labor Cost • Reduces Errors • Eliminates Extra Handling • Available Sooner for Analysis

  24. Biometrics • Authenticates Person’s Identity • Verifies Personal Characteristic • Fingerprint • Hand Geometry • Shape & Size of Person’s Hand • Iris Recognition • Blood Vessel Patterns in Eye • Face Recognition • Voice Recognition

  25. Terminals • Send / Receive Data To / From Host • POS (Point-Of-Sale) • Record Purchases • Process Credit / Debit • Update Inventory • ATM (Automated Teller Machine) • Self-service Banking Machine

  26. Physically Challenged • Keyguard • Large Key Keyboards • Head-mounted Pointer • Controls Pointer on Screen • Gesture Recognition • Computerized Implant Devices

  27. Output • Data Processed into a Useful Form • AKA Information

  28. Display Devices • Monitor • Packaged as Separate Component • Quality • Resolution • Response Time • Brightness • Dot Pitch • Diagonal Distance Between Pixels • Contrast Ratio • Difference of Brightest White & Darkest Black

  29. Display Devices • LCD (Liquid Crystal Display) • Crystals Between Two Sheets of Material • Plasma • Applies Voltage to Layer of Gas • Larger Screen Size • More Expensive

  30. Display Devices • Video Card • AKA Graphics Card or Video Adapter

  31. Display Devices • Bit Depth • Number of Bits Used to Store Pixel Data • Determines Number of Colors Displayed • 32-bit Video Card • 232 = 4.3 Billion Colors

  32. Display Devices • Resolution • Number of Horizontal / Vertical Pixels • Sharpness & Clarity of Image • Higher Resolution • Sharper Image • More can be Displayed on Monitor • Some Elements Smaller

  33. Portrait Orientation Landscape Orientation Printers • Produces Text & Graphics on Paper • Result is Hard Copy • AKA Printout • Orientations • Portrait • Landscape

  34. Printers • Resolution • Sharpness & Clarity • Measured by DPI (Dots per Inch) • Speed • Measured by PPM (Pages per Minute)

  35. Printers • Non-impact • Doesn’t Strike Paper • Types • Ink-jet • Laser • Thermal • Photo • Label • Plotter • Portable

  36. Non-impact Printers • Ink-jet • Sprays Tiny Drops of Ink onto Paper

  37. Non-impact Printers • Photo • Produces Photo-lab-quality Pictures • Many have Built-in Card Slot • Use Ink-jet Technology

  38. Non-impact Printers • Laser • High-speed, High-quality • DPI ranges from 600 to 2,400 dpi

  39. Non-impact Printers • Thermal • Uses Electrically Heated Pins • Heat-sensitive Paper • Thermal Wax-transfer • Dye-sublimation

  40. Non-impact Printers • Mobile • Small • Lightweight • Battery-powered • Print from: • Notebook • Smart Phone • Mobile Device

  41. Non-impact Printers • Label • Uses Adhesive-type Material • Most Print Bar Codes • Plotter • Produces High-quality Drawings

  42. Printers • Impact • Mechanism Strikes Inked Ribbon • Ribbon Contacts Paper • Ideal for Multipart Forms • Can Withstand • Dusty Environments • Vibrations • Extreme Temperatures

  43. Impact Printers • Dot-matrix • Pins on Print Head Strike Inked Ribbon • Line Printer • High Speed

  44. Audio • Produces Music, Speech, & Sounds • Speakers • Subwoofer • Headset • Earbuds • Sound Card

  45. Audio • Voice • Computer Talks to You Through Speakers • Internet Telephony • AKA VoIP • Make Voice Calls Using Internet • Comcast

  46. Other Output Devices • Multifunction • AKA All-In-One • Provides Functionality of • Printer • Scanner • Copy Machine • Fax Machine

  47. Other Output Devices • Data Projector • Projects Computer Image to Larger Screen • Force Feedback • Sends Resistance to Device • In Response to User Actions • Interactive Whiteboard • Displays Image on Connected Computer

  48. Other Output Devices • Physical Challenges • Magnifier • Enlarges Items in Window on Screen • Braille Printer • Windows Settings • Increase Size / Change Color

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