Lesson activities for

Download 363.63 Kb.

Page	1/5
Date	28.01.2017
Size	363.63 Kb.
	#9623

1 2 3 4 5

LESSON ACTIVITIES FOR

Block 3: Compression & Encryption and Block 4: Computers & Assembly Language Programming

Lesson 1 activities

Activity 1.1

Fill in this table to help you see what a difference compression makes to file size.
	File A	File B	File C
How many characters does the file contain?
What type of content does the file contain?
What is its file size before compression?
What is its file size after compression?
What is its compression ratio (decompressed size/compressed file size)?

Which file compresses the most? Explain why.

Activity 1.2

Your teacher is going to read out a series of binary numbers. The first pair of binary numbers represents a colour code as follows:

00 = blue

01 = white

10 = yellow

11 = green

The second set of binary numbers represents the run length of the colour. So, for example, 00, 1101 represents 13 blue pixels.

Assuming each of the squares in the grid below represents one pixel, listen to the series of binary numbers and shade the squares. The first line of pixels has been done for you.

Line 1: 00 0001 01 0011 00 1100

Activity 1.3 (homework)

Use four different colours to “draw” an image in the grid below.

Now encode the image using a 2-bit binary number to represent the colour depth and a 4-bit binary number to specify the run length of the pixels to be filled with that colour.

Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
Line 9
Line 10
Line 11
Line 12
Line 13
Line 14
Line 15
Line 16

Directory: content -> dam -> pdf -> GCSE
dam -> American bar association adopted by the house of delegates
dam -> Chevrolet – the Story of a Global Brand A. Louis Chevrolet and the Legend of Beaune
dam -> Embargo until 12/17/12
dam -> October/November 2015 Teacher's Guide Table of Contents
dam -> Boston College Athletics Advisory Board Annual Report, 2011-12
dam -> Executive Board of the United Nations Development Programme, the United Nations Population Fund and the United Nations Office for Project Services
dam -> Boston College Athletics Advisory Board Annual Report, 2010-11
GCSE -> Gcse 09 German Vocabulary book Version- draft 1 gcse german

Download 363.63 Kb.

Share with your friends:

1 2 3 4 5