Storing Images and sound

Images are stored using a grid of ______.

• Pixels

• Dots

• Bits

A high quality image means

• its file size is larger.

• its file size is smaller.

• it has few colours

• it is blurry and pixelated

What is a pixel?

• Picture element - the small dots that make up an image.
• How an image is stored on the computer.
• A type of image
• A special type of photograph

Computers store images as....

• 0s and 1s

• colours and sizes

• black and white

What is the effect of increasing the resolution of an image?

• The image has more white
• The image gets bigger
• The image quality improves
• The image gets smaller

Which image has the highest resolution?

• 8 x 8 pixels
• 16 x 16 pixels
• 32 x 32 pixels
• 64 x 64 pixels

Which is true of sound waves and computers?

• Sound waves are analogue but computers only understand digital signals.

• Sound waves are digital but computers only understand analogue signals.

• Sound waves and computers both use digital signals

• Sound waves and computers both use analogue signals

When recording a sound, computers take measurements at regular intervals. This is called

• Interval selection

• Parameters

• Sampling

• Digital signals

A higher sample rate means (tick all that apply)

• A better quality/more accurate recording

• A lower quality/less accurate recording

• A larger file size required to store the final recording

• A small file size required to store the final recording

A lower sample rate means (tick all that apply)

• A better quality/more accurate recording

• A lower quality/less accurate recording

• A larger file size required to store the final recording

• A small file size required to store the final recording