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Fundamentals of Data representation (Storage (Bit (1), Byte (8 bits),…
Fundamentals of Data representation
Storage
Bit
1
Byte
8 bits
kilobyte
1000 bytes
megabyte
1000 kilobytes
Gigabyte
1000 megabyte
terabyte
1000 gigabytes
Representing images
pixel
smallest possible unit within an image
first byte
11111111
second byte
10001011
third byte
00000000
colour depth
a measure of how many colours are available
Analogue
sound is an analogue signal, which is opposite of digital.
sampling rate
a measured of how often sample is taken
sample resoloution
the number of bits used to store each sample
compression
techniques used to reduce the size of files
run length encoding
a form of compression that is effective when dealing with repeating data
calculate image
w x h x d
width,height,depth
Run length encoding
uncompressed
qqqwwwwtttp
compressed
3q4w3t1p