Lecture Notes for New Perspectives on Computer Concepts 2018: Comprehensive, 20th Edition

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New Perspectives on Computer Concepts 2018 Instructor’s Manual 1 of 22
© 2018 Cengage. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.
Computer Concepts
Module One: Digital Content
A Guide to This Instructor’s Manual:
We have designed this Instructor’s Manual to supplement and enhance your teaching experience
through classroom activities.
This document is organized chronologically, using the same heading in blue that you see in the
textbook. Under each heading you will find (in order): Lecture Notes that summarize the section,
Figures and Boxes found in the section (if any), Teacher Tips, and Classroom Activities. Pay
special attention to teaching tips and activities geared toward quizzing your students, enhancing
their critical thinking skills, and encouraging experimentation within the software.
In addition to this Instructor’s Manual, our Instructor’s Resources includes PowerPoint
Presentations, Test Banks, and other supplements to aid in your teaching experience.
Module Contents
Objectives 2
Section A: Digital Basics 2
Section B: Digital Sound 6
Section C: Bitmap Graphics 10
Section D: Vector Graphics 14
Section E: Digital Video 17
Glossary of Key Terms 20

New Perspectives on Computer Concepts 2018 Instructor’s Manual 2 of 22
© 2018 Cengage. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.
Objectives:
 Compress files containing various types of data, including text, photos, music, and videos.
 Record audio files.
 Select an audio sampling rate and file format for high-quality sound in files that won’t use up all
your storage space.
 Convert audio files from one format to another.
 Use voice commands to control your digital devices.
 Select the best file format for digital images, such as photos and scans, taking into account
which formats reduce image quality with lossy compression.
 Convert a paper document into a digital file that can be edited using word processing software.
 Work with RGB colors in decimal, hexadecimal, or binary notation.
 Use resolution to gauge the maximum size for an image.
 Use “photoshopping” techniques to enhance, colorize, clone, inpaint, clip, and merge photo
images.
 Capture 360-degree images on your smartphone.
 Draw vector images for logos and infographics.
 Convert vector images into bitmaps.
 Render a 3D image from a wireframe.
 Use video editing software to combine video footage with a soundtrack.
 Select output settings for a video, including aspect ratio, resolution, bit rate, compression level,
and file format.
 Transcode a video from one file format to another.
 View vector and bitmap images in a VR headset.
SECTION A: DIGITAL BASICS
Section A: OBJECTIVES
Students will have mastered the material in Section A when they can answer the following questions:
 List three technologies that digital devices use to physically store or transmit 1s and 0s.
 Write the numbers 1 through 10 in binary.
 Decipher ASCII text.
 Demonstrate how to use the terms
bit,
byte,
megabyte,
megabit, and
gigabyte in the context of
data storage and digital devices.
 Distinguish between data that would be represented by binary numbers and data that would be
represented by ASCII or Unicode.
 Explain how OCR relates to ASCII and Unicode.
 Describe the difference between lossy and lossless compression.
 Demonstrate how to compress a file.
SECTION A OPENER QUESTION:
Data refers to the symbols that represent people, events, things, and ideas. (Answer a)
a. True
b. False

New Perspectives on Computer Concepts 2018 Instructor’s Manual 3 of 22
© 2018 Cengage. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.
The Digital Revolution
LECTURE NOTES
 Is there a difference between data and information?
 What is data representation?
 What’s the difference between analog and digital?
 How does digital data work?
 How is digital data stored?
FIGURE
 Figure 1-1
CLASSROOM ACTIVITIES
 Quick Check:
Which of the devices on the left illustrate analog data representation?
a. The speedometer and YouTube
b. The television and the vinyl record
c. All but the speedometer
d. All but YouTube and the clock
Digital devices work with bits in all of the following ways except:
a. voltage variations
b. light and dark spots
c. analog values
d. orientation of magnetized particles
Representing Numbers
LECTURE NOTE
 How do digital devices represent numbers?
FIGURE
 Figure 1-2

New Perspectives on Computer Concepts 2018 Instructor’s Manual 4 of 22
© 2018 Cengage. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.
TEACHER TIP
If you need to brush up on binary numbers refer to Figure 1-2.
 Quick Check:
Which one of the following is considered numeric data?
a. Passport number 47756902231
b. Telephone number 906-222-3450
c. The $28,995.00 cost of a car
d. The address 22 E. Main Street
Figure 1-2 shows the binary equivalent for numbers 0 through 11 and 1000. What is the binary
equivalent for the number 12?
a. 10111
b. 1100
c. 10000
d. 1111
Representing Text
LECTURE NOTES
 How do digital devices represent text?
 Why are there ASCII codes for numbers?
 Where is digital text used?
 What is plain text?
 How does formatting get added to documents?
 What happens when I scan a document?
FIGURES
 Figure 1-3, Figure 1-4, Figure 1-5
TEACHER TIP
Take a look at the ASCII codes in Figure 1-3. Notice there is a code for the space character in addition
to codes for symbols, numerals, uppercase letters, and lowercase letters.
Figure 1-4 illustrates an ASCII text file and the actual binary code that is stored for it.
Figure 1-5 gives you a behind-the-scenes look at the Roller Coasters document with all the embedded
formatting codes revealed.
CLASSROOM ACTIVITIES
 Lab Activity
Scan a one-page document using a scanner or a multifunction printer. The default format for the
scan is probably a JPEG or PNG graphic. Try using your scanner’s OCR feature or a free online OCR
service to convert the scan into a document that can be edited using word processing software.

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