Sound images and compression in binary

Question 1

What are factors that affect the file size of images?

Answer 1

colour depth and resolution

Question 2

What factors affect the size of sound files

Answer 2

sample rate, bit depth and duration

Question 3

What are 2 types of compression?

Answer 3

lossy and lossless

Question 4

What is lossy compression?

Answer 4

This is where file size is reduced by removing some of the data compromising on quality

Question 5

What is lossless compression?

Answer 5

This is where the original data is preserved by finding a different way to represent the file in binary this is not as effective as lossy but doesn’t compromise on quality.

Question 6

What is colour depth?

Answer 6

Colour depth is where a colour is assigned a value in binary the more colours the more binary needed to store each colour.

Question 7

What is resolution?

Answer 7

This is the number of pixels used to display an image

Question 8

What is sample rate?

Answer 8

This is the frequency at which sounds are recorded in a sound file

Question 9

What is bit depth in sound files?

Answer 9

The range and depth of sounds that a computer can detect the higher this is the more accurate the sound file becomes.

Question 10

What is metadata?

Answer 10

Metadata is the data before a file that explains the parameters of a file e.g. bit depth sample rate resolution etc.