Lecture notes on compression techniques. View video lectures for computer science 2210 on: https://mastercscience.wordpress.com/

1. Computer Science
CIE-Syllabus 2210
Lesson 22
Compression of
sound/video files.
Tutor: Suraj Motee

2. Learning Outcomes
• Explain how sound files can be compressed.

3. Compressed sound
File size is dependent on bit rate (Sample Rate, Sample Resolution)

4. Sound Compression
• The bit rate of a sound recording means the number of bits
used to store one second of sound.
• Hence, sound compression can be achieved by reducing the
bit rate of the recording.

5. Sound compression
Using fewer
channels
Lower
sample rate
Reduced bit
depth

6. Video Compression
• High definition videos use a lot of storage space. Video
compression means reducing the bit rate. To do this you can
reduce: