1 Information Representation Flashcards
Binary
Base 2 number system based on values of 0 and 1
Bit
abbreviation for binary digit
One’s Complement
Each binary digit is reversed to allow representation of positive and negative numbers
Two’s Complement
Each binary digit is reversed and a 1 is added to the right-most position to represent positive and negative numbers
Hexadecimal
A base 16 number system
Memory Dump
content of the computers memory is outputted on the screen
Binary Coded Decimal (BCD)
a number system that uses 4 bits to represent each deanery digit
ASCII code
coding system for all characters on a keyboard and control codes
Unicode
coding system that represents all languages in the world, the first 128 characters are the same as ASCII)
Bit map Image
system that uses pixels to make up an image
pixel
smallest picture element that makes up an image
Colour depth
number of bits used to represent the colors in a pixel
Bit depth
number of bits used to represent the smallest unit in a sound or image file
Image resolution
number of pixels that make up an image
Screen resolution
number of horizontal and vertical pixels that make up a screen display
Sampling resolution
number of bits used to represent sound amplitude
Sampling rate
number of sound samples taken per second
Frame rate
number of video frames that make up a video per second
Lossless File Compression
A file compression method where the original file could be restored after decompression.
Lossy File Compression
A file compression method where parts of the original file cannot be recovered during decompression.
