iGCSE Decimal, Binary and Hexadecimal number systems
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
