Cgmb 324: multimedia system design. Chapter 9: Video Compression. Objectives. Upon completing this chapter, you should be able to: understand the terms and concept related to video compression identify the commonly available video codec
Chapter 9: Video Compression
Upon completing this chapter, you should be able to:
big problems for storage and network communications.
(adapted from www.wikipedia.org)
1. What is MPEG ?
2. Differences from H. 261
3. Decoding MPEG Video in Software
IDCT – Inverse DCT
3. MPEG-7 (Multimedia Content Description Interface)
Left : Divx Pro 5.0.4 Codec
Near DVD Quality compression
Below : MPEG-1 Codec
VHS Quality compression
Video that suffers from the blocky effect would not be suitable to depict the ants above.
Music videos require high quality codecs at good file sizes so that the fans (and artiste) are not disappointed. The one above isn’t good enough.
Sceneries do not pack much detail, so sometimes, even a poor codec can do the job.