Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Computer Science > Chapter 3 - Part 2 > Flashcards

Chapter 3 - Part 2 Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

Analogue

A

Has no discrete value and varies continuously. Represented as a wave

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

Bit depth

A

No. Of bits used for each sample

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

Sampling rate

A

No. Of samples taken per second

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

Sample

A

Measure of amplitude @ a given time

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

How is analogue converted to digital

A

Analogue to digital converter will take in the sound wave and convert it to electrical signals.

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

Higher sample rate does what to quality?

A

Higher quality of sound

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

Units for sample rate

A

Hertz (Hz)

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

File size of single channel sound file (bits) = …

A

sampling rate x sample resolution x seconds

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

Data compression

A

Reducing the number of bits needed to store data

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

Advantage of data compression

A

Sending files takes less time to transfer

If on a web page, then it will take less time to load and open

Ensures that it can be received on anyones’ device

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

2 types of data compression

A

Lossy

Lossless

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

Lossy compression

A

Parts of a file are lost when compressed and can not be retrieved

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Examples of lossy compression

A

JPEG for images

MP3, mp4 and ogg for sound

WMV and mpeg for Videos

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Lossless data compression

A

Reduces the file size without Losing any data

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Examples of lossless compression

A

PNG for images

Flac and alac for sound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Reasons for using lossy compression

A

Videos can NOT be compressed with lossless

Lossy can compress files to a smaller size than lossless

17
Q

Run length encoding (RLE)

A

Method of LOSSLESS compression. Groups together any binary

E.g. 00001100000111111

becomes…

40 21 50 61

18
Q

Huffman coding

A

Method of LOSSLESS compression. Reduces the number of bits required to store data

19
Q

Extended ASCII uses how many bits

A

8

Computer Science (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions