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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Chapter 3
Understanding Input Peripherals
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Pada akhir pertemuan ini, diharapkan mahasiswa
akan mampu :
• menjelaskan tentang contoh-contoh
perangkat input pada komputer
Learning Outcomes
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• Pointing Devices
• Voice Input
• Input Devices for Mobile User
• Scanners
Outline Materi
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Input device is any hardware component used
to enter data or instructions
Data or instructions entered into memory
of computer
What Is Input?
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• What are the two types of input?
Unprocessed text,
numbers, images,
audio, and video
Instructions
Programs
Commands
User responses
Data
What Is Input?
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• How is the keyboard
divided?
Typing area
Numeric keypad
Function keys, special
keys that issue
commands
The Keyboard
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• A keyboard is an input device that contains keys users
press to enter data and instructions into a computer
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
The Keyboard
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
The Keyboard
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• Keyboards on mobile devices typically are smaller
and/or have fewer keys
• Some phones have predictive text input, which saves
time when entering text using the phone’s keypad
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Pointing Devices
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Pointing Devices
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• A mouse is a pointing device that fits under the palm of
your hand comfortably Most widely used pointing device on desktop computers
• A mouse can be wired or wireless
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Pointing Devices
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• Mouse operations
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Other Pointing Devices
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Other Pointing Devices
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Touch Screens and Touch-Sensitive Pads
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• A touch screen is a touch-sensitive display device
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Touch Screens and Touch-Sensitive Pads
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Pen Input
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• With pen input, you touch a stylus or digital pen
on a flat surface to write, draw, or make selections
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Pen Input
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• Where is a stylus used?
Some desktop computers
Many mobile computers
and devices
Handwriting recognition
software translates
handwriting into characters
that computer can process
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Other Input for Smart Phones
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Game Controllers
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• Video games and computer games use a game
controller as the input device that directs movements
and actions of on-screen objects
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Game Controllers
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Voice Input
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• Voice input is the process of entering input by
speaking into a microphone
• Voice recognition is the computer’s capability of
distinguishing spoken words
• Audio input is the process of entering any sound into
the computer
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• How does voice recognition work?
Step 2. An analog-to-digital converter (ADC) translates
sound waves into digital measurements computer can
process. Measurements include pitch, volume, silences, and
phonemes. Phonemes are sound units such as aw and guh.
10010111010110101100001101
Step 3. Software compares
spoken measurements with those
in its database to find a match or
list of possible matches.
Matches
Step 4. To narrow a list down, 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.
Natural Language Engine
Step 1. A user dictates text into a microphone.
Voice Input
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Voice Input
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• Music production software allows users to
record, compose, mix, and edit music and
sounds
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• What is a digital camera?
A digital camera is a
mobile device that
allows users to take
pictures and store them
digitally
Images viewable
immediately on
camera
Digital Cameras
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• What is video input?
Process of entering full-motion images
into computer
Video capture card is
adapter card that converts
analog video signal into
digital signal that
computer can use
Digital video (DV)
camera records video as
digital signals
Video Input
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• What are a PC video camera and a Web cam?
PC video camerac—cDV camera used to capture video
and still images, and to make
video telephone calls on Internet
Also called PC camera
Web camc—cvideo camera
whose output displays on
a Web page
Video Input
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• What is video conferencing?
Whiteboard is
another window on
screen that can
display notes and
drawings
simultaneously on
all participants’
screens
Two or more geographically separated people
who use network on Internet to transmit
audio and video data
Video Input
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• What is a scanner? Flatbed
Pen or
Handheld
Sheet-fed
Drum
Light-sensing device that
reads printed text and
graphics
Used for image processing,
converting paper documents
into electronic images
Scanners and Reading Devices
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• What is an optical reader?
Optical character recognition
(OCR) reads characters in
OCR font
Optical mark recognition
(OMR) reads hand-drawn pencil
marks, such as small circles
MICR (magnetic ink character
recognition) devices read text
printed with magnetized ink
Bar code scanner
Device that uses light source to read characters, marks,
and codes and then converts them into digital data
Scanners and Reading Devices
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• What is a bar code reader?
Uses laser beams to read bar codes
Scanners and Reading Devices
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Scanners and Reading Devices
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• QR code (abbreviated from Quick Response Code) is the
trademark for a type of matrix barcode (or two-dimensional
barcode) first designed for the automotive industry in
Japan. A barcode is a machine-readable optical label that
contains information about the item to which it is attached.
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Scanners and Reading Devices
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• RFID (radio frequency identification) uses radio signals to communicate
with a tag placed in or attached to an object
• An RFID reader reads information on the tag via radio waves
• RFID can track:
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Scanners and Reading Devices
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Magnetic stripe card readers read the
magnetic stripe on the back of cards such
as:
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• What is a data collection device?
Obtains data directly at location where transaction
or event takes place
Transmits data over
network
or Internet
Scanners and Reading Devices
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Used in:
Restaurants
Grocery stores
Factories
Warehouses
The outdoors
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• What is a point of sale (POS) terminal?
Records purchases,
processes credit or debit
cards, and updates inventory
Swipe credit or debit card
through card readerc—creads
customer’s personal data
from magnetic strip
Terminals
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• What is an automated teller machine (ATM)?
Self-service banking machine that connects to a host
computer through a network
Terminals
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• What is a smart display?
Thin monitor that detaches from computer to function
as portable wireless touch screen
Terminals
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Biometric Input
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Biometrics authenticates a person’s identity
by verifying a personal characteristic
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Fingerprint scanner captures
curves and indentations of
fingerprint
Hand geometry system measures
shape and size of person’s hand
Biometric Input
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
Biometric Input
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Face Recognition System
Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• What are examples of biometric technology?
Voice verification system compares live
speech with stored voice pattern
Signature verification system recognizes
shape of signature
Iris recognition system reads
patterns in blood vessels in back
of eye
Biometric data is sometimes stored
on smart card, which stores
personal data on microprocessor
embedded in card
Biometric Input
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Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi
• Source : Shelly, Gary B. Discovering
Computers (2004/2005/2006). Thomson
Course Technology. PPT for Chapter 5.
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