Studied by 2 people
how many bits are in a byte
8
what does resolution mean
number of pixels per inch
what is colour depth
the number of colours displayed in an image
more colours means what?
There will be more bits per pixel
how does a ADC work
we sample the analog sound, measure and record the amplitude, which is then stored as a binary number, After a certain time interval, this is repeated
what happens when the sample rate is increased
more binary numbers need to be stored and the file size is larger. But it provides better quality
what happens when sample rate is decreased
the file size is smaller bc less bits stored, sound quality decreases
what's lossy compression
when a file is decompressed it's not identical to the original, some data has been lost
what's lossless compression
when a file is decompressed, it's identical to the original.
when is lossy compression used
with sound or image files
when is lossless compression used
for text files, when all data is essential and cannot be lost
what are vector graphics made up of
geographical shapes
what are bitmaps made up of
pixels
which is more realistic: bitmaps or vector graphics?
bitmaps- as vector graphics have a limit on the number of geometrical shapes
