Digital Communication Systems

1
Digital Communication Systems

• Explain the uses of current and emerging
  alternative input devices.

2
What are Digital Camcorders?

• Digital Camcorders put camcorders and computers
  together
• Videos can be transferred directly to a computer
  without having to convert
• Images are better quality

3
Tablet PC

• A type of notebook computer that has an LCD
  screen on which the user can write using a
  special-purpose pen, or stylus.
• The handwriting is digitized and can be converted
  to standard text through handwriting recognition,
  or it can remain as handwritten text.
• Tablet PCs also typically have a keyboard and/or
  a mouse for input.

4
Interactive Whiteboards

• Whiteboards are connected to a computer.
• Input can be accomplished by writing or tapping
  on the whiteboard through interactive software.

5
Laptop Computers

• A small, portable computer small enough that it
  can sit on your lap.
• Laptop computers are more frequently called
  notebook computers.

6
Web TVs

• WebTV Classic and Plus services consist of two
  parts the WebTV Reference Design, on which WebTV
  licensees such as Sony and Philips base their
  boxes, and the WebTV Network, a
  subscription-based online service that is an
  essential part of what makes the TV-based Web
  browser feasible.
• Web TVs cost approximately 75.00
• The Keyboard costs approximately 25.00

7
Biometric Devices

• Authentication techniques that rely on measurable
  physical characteristics that can be
  automatically checked.
• Thumb prints, retina scan, finger prints, etc.

8
Pocket PCs and PDAs

• Pocket PC
• Fits in your pocket
• Electronic PC that can access the Internet and
  allows you to do anything you need to do.

9
Software For Palm Devices

• Bachman PrintBoy Anywhere
• Vivonic Fitness Planner Software
• Palm Mobile Mentor Student CD
• Imagiworks Water Quality ImagiLab Software

10
Web Cell Phone

• A cellular telephone that also allows users to
  access the Internet via wireless communication

11
Magnetic Scanner

• A device that scans magnetic strips on credit
  cards and other types of cards to input the data
  from the strips into a computer.

12
Barcode Scanner

• Input devices that read bar codes that allow you
  to track both assets and inventory, check items
  in, manage item locations, maintain physical
  inventory, and control fixed assets.

13
Web Camera

• A camera that broadcasts images through the
  Internet or web cell phone.
• Also known as a Webcam.

14
Digital Cameras

• People can take pictures and save them to a disk
  so they can have them on their computer.
• Digital cameras also provide the option of adding
  different backgrounds or making the picture look
  different.

15
What is a GPS?

• The Global Positioning System (GPS) is a
  worldwide radio-navigation system formed from a
  constellation of 24 satellites and their ground
  stations.
• GPS uses these "man-made stars" as reference
  points to calculate positions accurate to a
  matter of meters. In fact, with advanced forms of
  GPS you can make measurements to better than a
  centimeter!

16
How GPS Works

• The basis of GPS is triangulation from
  satellites.
• To "triangulate," a GPS receiver measures
  distance using the travel time of radio signals.
• To measure travel time, GPS needs very accurate
  timing which it achieves with some tricks.

17
What is a USB Drive? 

• The USB Drive is an exciting advancement in the
  personal data storage market.
• Because of its tiny size, large capacities, and
  use of the USB standard, the USB Drive
  revolutionizes the way people deal with large
  amounts of information.

18
Headset with Microphone

• Lightweight
• Allows people to hear game sounds and command
  notifications.
• Designed for comfort through long game sessions.
• Input device for speech recognition.

19
Microphones

• The attached microphone broadcasts your voice to
  chat session participants and allows you to issue
  voice commands.
• The noise-cancelling microphone has been
  optimized for voice command recognition and lets
  you communicate clearly while playing online.

20
What other input devices can you think of?