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Fundamentals of Data Representation

Binary
A number system that uses two bits: 0 and 1.

Bit
Binary Digit; It can be 0 or 1.

Byte
A group of 8 bits.
MWS Binary

Pixel
Picture Element, the smallest addressable area or solid block of colour in an image.

Bitmap
Where pixels are mapped to positions in memory, that store the binary code representing its colour.

Colour Depth
The number of bits needed to represent the colour in a single pixel.

Vector Graphic
An image comprised of shapes called objects and their properties.
MWS Graphics

Analogue Data Data that varies continuously.
Digital Data Data that has discrete values.

PAM
Produces an electrical signal proportional to the regular sample of the analogue signal.

PCM
Codes the sampled analogue signal into its binary equivalent.

Quantisation Noise
The difference between the original amplitude and the sampled value.

Nyquist Theorem
Sample at least twice the highest frequency of sample.

MWS Sound

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