Ch.1 Data representation Flashcards
(19 cards)
analogue data
a continuous stream of data that is processed by humans
logic gate
a very small component in a computer system that controls the flow of electricity
digital data
discrete data that only uses the value 0 and 1
register
a small component in a computer system that is used to temporarily store data
denary
a base-10 number system that uses the values 0-9
MAC address
a unique address that is given to a computer at the manufacturing stage that can be used to identify the computer
character set
it contains all the characters that are in that character set and the binary value that is assigned to each character
pixel
a very small dot of colour that is displayed with many others to create an image
resolution
the dimensions of an image
metadata
additional data that is stored with an image that can provide information such as the dimensions of the image and the time and date the image was taken
colour depth
the number of bits that are used to create each colour in an image
sound sampling
a little piece of sound that is recorded at regular time intervals
sample rate
the number of samples recorded each second
sample resolution
the number of bits that are used to record each sound sample
compression
a method that uses an algorithm to reduce the size of a file
lossy
a compression method that reduces the size of a file by permanently removing data
lossless
a compression method that reduces the size of a file by temporarily altering the data
perceptual music shaping
a process that is used in lossy compression that removes sounds that are not normally heard by the human ear
run length encoding (RLE)
an algorithm that groups together repeating patterns and indexes them
