Number Systems
How many bits are in one byte?
8 bits
This measures how many samples of sound are taken per second.
sample rate
This compression permanently removes data.
lossy compression
Convert binary 001010 to denary.
10
Data stored in continuous signals is called this.
analogue data
What number system is base 16?
Hexadecimal
This describes how accurately each sound sample is stored.
Sample resolution
This compression reduces file size without losing data.
lossless compression
Convert hexadecimal B5 to binary.
10110101
Data stored using binary numbers is called this.
digital data
Computers use this number system to process data.
Binary
This system converts text characters into binary codes.
ASCII
One main reason files are compressed
to reduce storage space
Convert denary 57 to binary.
00111001
State what is meant by image resolution
The dimensions of an image // Number of pixels wide by number of pixels high
This part of a MAC address identifies the manufacturer.
first six hexadecimal digits
This character system supports many more languages than ASCII.
UNICODE
Compression helps files do this faster over the internet.
transfer faster
Convert hexadecimal 4AF to binary
010010101111
This is the number system humans normally use in everyday life.
Denary
hy do programmers often use hexadecimal instead of binary?
it is shorter and easier to read
Increasing this in an image allows more colours to be displayed.
colour depth
Georgia compresses photographs to store them on the USB flash memory drive. It is important that the compression does not affect the quality of the photographs in any way.
State which type of compression is the most suitable.
lossless compression
Convert denary 179 to hexadecimal.
B3
Give your answer in binary.
00110011
+01100001
10010100