Data Compression Flashcards
1
Q
What is lossless compression?
A
When the size of a file is reduced with out losing any data
2
Q
What is lossy compression?
A
When the size of a file is reduced and some of the data is lost
3
Q
What kind of files is lossy compression used on?
A
Image, video and audio
4
Q
What kind of file is lossless compression used on?
A
Text files
5
Q
Why can’t lossy compression be used on text files?
A
Because some of the data is lost, the text would be missing characters so it wouldn’t make any sense
6
Q
What is the sample rate of an audio file?
A
The number of samples taken per second
7
Q
What is the bit depth of an audio file?
A
The amount of bits used to represent one sample.
8
Q
What is the metadata of an image?
A
Data about the file, such as name and last modified date
