Image and Sound representation

Question 1

What is each pixel assigned with?

Answer 1

A binary value which represents the colour of that pixel

Question 2

What is image resolution?

Answer 2

The quality of the bitmap image depends on the total amount of pixels, known as image resolution

Question 3

How do you calculate the file size of the bitmap?

Answer 3

Resolution (height x width in bits) x colour depth

Question 4

What is colour depth?

Answer 4

The number of bits in a pixel

Question 5

What is metadata?

Answer 5

Additional data about a file

Question 6

Examples of metadata?

Answer 6

Colour depth, file depth, and resolution

Question 7

What must analogue sound waves be converted to?

Answer 7

Must be digitally recorded and stored in binary

Question 8

How do we record the sound?

Answer 8

Amplitude (height) of the analogue sound wave is measured and recorded into binary at specific intervals

Question 9

What is sample rate?

Answer 9

The number of times per second the amplitude of the sound wave is measured. It is measured in kilohertz

Question 10

What is bit depth?

Answer 10

Is the number of bits available for each sample. The higher the bit depth, the more bits are available to be used for each sample

Question 11

How do you calculate the sound file size?

Answer 11

Sample rate x bit depth x duration