CS-iGCSE-CIE-Notes

   
Word Definition
Colour Depth Number of bits per pixel
Amplitude The maximum extent of a sound wave (measure of its change in a single period)
Binary Base 2 number system used in computing
Hexadecimal Base 16 number system used by programmers
Bit A value of either 1 or 0 determined by logic gates in the CPU
Register Small amounts of fast data stored in the cpu
Byte An 8-bit sequence
Upper Nibble The first four digits of a bite
Lower Nibble The last 4 digits of a bite
Sample resolution Number of bits per sample
Sample rate Number of samples taken per second
Resolution Number of pixels in bitmap
Bitmap 2D matrix of pixels used to represent an image
Colour depth Number of bits used to represent each pixel
Lossless compression Compresses files without losing data
Lossy Compresses files while permanently losing data

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