Topic 1: Data Representation Flashcards
Hexadecimal
A base 16 number system thatr uses the value 0-9 and characters A-F
Binary
A base 2 numbers system that uses the values 1 and 0
Analogue data
A continous stream of data that is processed by humans
Logic Gate
A very small componenet in a computer system that controls the flow of electricty.
Digital data
Discrete data that only uses the values 1 and 0
Register
A small componenet in a computer system that is used to temproarliy store data.
Denary
A base 10 number system that uses the values 0-9
MAC Address
A unique address that is given to a somputer at the manufacturing stage that can be used to identify the computer.
Overflow error
A type of error that occurs when a number larger than a register can be store is generated.
Character Set
It contains all the characters that are in the character set and the binary value that is assigned to each character.
Pixel
A very small dot of color that is displayed with many other to create an image.
Resolution
The dimenstion of an image
Metadata
additional data that is stored with an image that can provide information such as the dimension of the image and the time and date the image was taken.
colour depth
The number of bits that are used to create each color in an image.
Sound Sampling
A little piece of sound that is recorded at regualr 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 the file.
Lossy
A compression method that reudce the size of a file by permenatly removing data.
Lossless
A compression method that reduces the size of a file by temporrliy alternating the data.
Perceputal music shaping
A process that is used in lossy compression that removes sounds that are not normorally heard by the human ear.
Run length encoding (RLE)
An algorithm that groups together repeating patterns and indexes them.
