1.2 - Text, Sound & Images Flashcards
What is a bitmap image? [2]
an image using bits and pixels
What is a pixel? [2]
- small elements of colour that make up a bitmap image
What is colour depth? [2]
number of bits in a bitmap image
What is screen resolution? [2]
how good the resolution of the screen is
What is image resolution? [2]
number of pixels in the X-Y direction of an image
What happens if you increase the colour depth in terms of file size? [1]
file size also increases
What is the formula for sample rate? [2]
RATE = FILE SIZE / SAMPLE RESOLUTION x LENGTH
What is the formula for sample resolution? [2]
RESOLUTION = FILE SIZE / LENGTH x SAMPLE RATE
What is the formula for file size? [2]
SAMPLE RATE x SAMPLE RESOLUTION x LENGTH
What is the formula for length? [2]
FILE SIZE / SAMPLE RESOLUTION x SAMPLE RATE
What unit should you always convert sample rate into? [1]
Hertz (Hz)
What unit should you always convert sample resolution into? [1]
Bits
What unit should you always convert time into? [1]
Seconds
What is the formula for resolution with colour depth involved? [2]
resolution = file size / colour depth
What is the formula for file size with colour depth involved? [2]
resolution x colour depth
What is the formula for colour depth? [2]
file size / resolution
How do you convert from bits to byte in binary? [1]
divide by 8
How do you convert from byte to bits in binary? [1]
multiply by 8
How do you get from Byte to Kib, Kib to Mib, MiB to Gib, Gib to Tib? [4]
divide by 1024 EACH TIME
What is 1024 in indice shortcut? [1]
2^10
How do you get from Tib to Gib, Gib to Mib, MiB to Kib, Kib to Byte? [4]
multiply by 1024 EACH TIME
How do you convert from bits to byte in denary? [1]
divide by 8
How do you convert from byte to bits in denary? [1]
multiply by 8
How do you get from Byte to KB, KB to MB, MB to GB, GB to TB? [4]
divide by 1000 EACH TIME
What is 1000 in indice shortcut? [1]
10^3
How do you get from TB to GB, GB to MB, MB to KB, KB to Byte? [4]
multiply by 1000 EACH TIME
What is sampling resolution? [2]
number of bits used to represent sound amplitude
What is sampling rate? [2]
number of sound samples taken per second
