It produces a close match of the data after decompression whereas lossless creates exact original data.
1 of 16
How does Lossless Compression work?
The size of the file is reduced without sacrificing image quality. Unlike lossy, it doesn't lose any data from the file
2 of 16
Advantages of Compression
1)Require less storage. 2)Data transmission time is faster. 3)Communication bandwidth
3 of 16
Disadvantages of Compression
1)Results in loss of quality 2)Bandwidth is limited 3)Unknown bite and pixel relationship
4 of 16
What is RLE?
It is a simple method of compressing data by specifying the number of times character or pixels colour repeats followed by the value of the character or pixel.
5 of 16
Examples of Lossy things
JPEG, PEG, GIFS, MP3, MP4
6 of 16
What is dictionary coding?
Dictionary coding is another form of lossless compression which looks to replace the file's data with a reference to what the data is.
7 of 16
What is sampling?
Sampling is simply recording snippets of sound at set intervals
8 of 16
Why is a fast sampling rate beneficial?
As it reduces the size of gaps between each sound recordings
9 of 16
What it bit rate?
The number of bits stored per sample
10 of 16
An example of how to calculate bit rate
(320,000 x 180) / 8 = 7.2 mb
11 of 16
How to calculate bit rate
(Bits per second x Number of seconds it was recorded for) / 8 = Bytes
12 of 16
What does Metadata do?
It tells the computer how to split up the binary values and how quickly they need to be played back
13 of 16
What are bitmaps?
Bitmap images are made up of rows of dots called pixels. Each pixel is represented by a binary number.
14 of 16
8 bit colour
The byte represents 256 colors
15 of 16
Higher DPI means?
Higher resolution which in turn means a more defined image
16 of 16
Other cards in this set
Card 2
Front
How does Lossless Compression work?
Back
The size of the file is reduced without sacrificing image quality. Unlike lossy, it doesn't lose any data from the file
Comments
No comments have yet been made