Input & Output

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