Chapter 3 - Understanding Input Peripherals

Aris Haryanto, S.Kom, MM Pengantar Teknologi Informasi

Chapter 3

Understanding Input Peripherals


Pada akhir pertemuan ini, diharapkan mahasiswa

akan mampu :

• menjelaskan tentang contoh-contoh

perangkat input pada komputer

Learning Outcomes

2


• Pointing Devices

• Voice Input

• Input Devices for Mobile User

• Scanners

Outline Materi

3


Input device is any hardware component used

to enter data or instructions

Data or instructions entered into memory

of computer

What Is Input?

4


• What are the two types of input?

Unprocessed text,

numbers, images,

audio, and video

Instructions

Programs

Commands

User responses

Data

What Is Input?

5


• How is the keyboard

divided?

Typing area

Numeric keypad

Function keys, special

keys that issue

commands

The Keyboard

6

• A keyboard is an input device that contains keys users

press to enter data and instructions into a computer


The Keyboard

7


The Keyboard

8

• 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


Pointing Devices

9


Pointing Devices

10

• 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


Pointing Devices

11

• Mouse operations


Other Pointing Devices

12


Other Pointing Devices

13


Touch Screens and Touch-Sensitive Pads

14

• A touch screen is a touch-sensitive display device


Touch Screens and Touch-Sensitive Pads

15


Pen Input

16

• With pen input, you touch a stylus or digital pen

on a flat surface to write, draw, or make selections


Pen Input

17

• Where is a stylus used?

Some desktop computers

Many mobile computers

and devices

Handwriting recognition

software translates

handwriting into characters

that computer can process


Other Input for Smart Phones

18


Game Controllers

19

• Video games and computer games use a game

controller as the input device that directs movements

and actions of on-screen objects


Game Controllers

20


Voice Input

21

• 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


• 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

22


Voice Input

23

• Music production software allows users to

record, compose, mix, and edit music and

sounds


• 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

24


• 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

25


• 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

26


• 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

27


• 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

28


• 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


29


• What is a bar code reader?

Uses laser beams to read bar codes


30



31

• 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.



32

• 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:



33

Magnetic stripe card readers read the

magnetic stripe on the back of cards such

as:


• What is a data collection device?

Obtains data directly at location where transaction

or event takes place

Transmits data over

network

or Internet


34

Used in:

Restaurants

Grocery stores

Factories

Warehouses

The outdoors


• 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

35


• What is an automated teller machine (ATM)?

Self-service banking machine that connects to a host

computer through a network

Terminals

36


• What is a smart display?

Thin monitor that detaches from computer to function

as portable wireless touch screen

Terminals

37


Biometric Input

38

Biometrics authenticates a person’s identity

by verifying a personal characteristic


Fingerprint scanner captures

curves and indentations of

fingerprint

Hand geometry system measures

shape and size of person’s hand

Biometric Input

39


Biometric Input

40

Face Recognition System


• 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

41


• Source : Shelly, Gary B. Discovering

Computers (2004/2005/2006). Thomson

Course Technology. PPT for Chapter 5.

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Chapter 3 - Understanding Input Peripherals

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