Unit 3: Data Representation: Lossy Compression

Question 1

Lossy compression removes quality that can be put back. True or False?

Answer 1

False

Lossy compression permanently removes some data, making it impossible to restore the original quality.

Question 2

The number of pixels in an image is called …….?

Answer 2

Resolution

Resolution defines the detail an image holds, typically measured in pixels.

Question 3

If you increase the sample rate of a sound file you make the quality?

Answer 3

Better

A higher sample rate captures more detail in the sound, improving quality.

Question 4

If you increase the number of pixels in an image you.

Answer 4

Increase the file size

More pixels generally mean more data, leading to larger file sizes.

Question 5

Colour depth refers to?

Answer 5

The number of colours that can represent a pixel

Colour depth affects the range of colours displayed in an image.

Question 6

We compress files so they cannot be read. True or False?

Answer 6

False

Compression is used to reduce file size while keeping the data readable.