iGCSE Decimal, Binary and Hexadecimal number systems

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Lossy Compression

MP3, MP4, JPG are types of ___ compression

A bit can hold the value of _____ or _____.

0,1

In hexadecimal, A = _____

10

1 Kilobyte =

1024 bytes

1 Megabyte =

1024 kilobytes

1 Gigabyte =

1024 megabytes

In hexadecimal, B = _____

11

In hexadecimal, C = _____

12

In hexadecimal, D = _____

13

In hexadecimal, E = _____

14

In hexadecimal, F = _____

15

1 byte =

8 bits

#000000 is .....

black

#0000FF

blue

ASCII is a _____ for encoding text.

character set

Each value encodes the _____ at that position in the image.

color

The process of encoding information, using fewer bits that the original representation. _____ allows for smaller file sizes which leads to faster transfer speeds.

compression

The _____ number system uses base 10, 0-9.

decimal

#00FF00 is .....

green

An image can be represented as a _____ of ____.

grid, values

3D is a _____ number.

hexadecimal

The _____ number system uses base 16. 0-F.

hexadecimal

A _____ is the smallest element of a digital image.

pixel

#FF0000 is .....

red

Colors are represented using the _____.

rgb color code

#FFFFFF is .....

white

The _____ number system uses base 2, 1 and 0.

binary

The name for a binary digit.

bit

Computers only understand _____.

Binary

MP3

Perceptual music shaping removes sounds that human ear cannot hear properly to effect the compression.

Lossy Compression

Reduction of file size by permanently removing some redundant information from the file

Lossless Compression

The file is reduced in size for transmission and storage, it is then put back together again later restore the file identical to the original

Manufacturer ID

The first 6 digits of a MAC Address represents..

Unique ID

The last 6 digits of a MAC Address represents..

JPG

This compression algorithm removes colours that the human eye cannot detect and matches them to similar colours that the human eye can detect.

Lossless Compression

Zip files, png, run length encoding and keyword encoding are types of ___ compression


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