1.2.4 Data Storage Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

ASCII Character Set.

A
  • 7 bits per character
  • 128 max characters
  • represents English
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Advantage of ASCII.

A
  • takes up less space as it only has 128 characters
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Disadvantage of ASCII.

A
  • limited amount of characters can be held
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Extended ASCII Character Set.

A
  • 8 bits per character
  • 256 max characters
  • represents English
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is included with Metadata?

A

Location
Date
Width
Height
Colour Depth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How do you calculate file size of an image?

A

Height x Width x Colour Depth

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is Sample Rate?

A

How many samples are recorded per second.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is Bit Depth?

A

Amount of information stored with each sample.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How do you calculate Bit Rate?

A

Sample rate x Bit Depth x No. of Channels (1/2/3 bit etc.)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How do you calculate file size of a sample?

A

Bit Depth x Duration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Lossy Compression.

A

Original data can be disregarded (permanently), so less data needs to be stored.
File size decreases massively.
Doesn’t work on written documents.
Works on music, images, videos.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Lossless Compression.

A

Reduces file sizes by using patterns.
No loss of quality.
Less effective at reducing file sizes.
Reversible.
Works on audio, images, text documents.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly