MPEG-4 and Divx
Chapter 3: MPEG-4 and Divx
MPEG-4 is a graphics and video lossy compression algorithm standard. It is based on MPEG-1 and MPEG-2 and Apple Quicktime technology. Wavelet based MPEG-4 files are smaller than JPEG or Quicktime files, so they are designed to transmit video with text, graphics and 2-D and
3-D animation layers. Wavelet technology can compress color images at rates of 20:1 up to 300:1 and grayscale images at 2 to 50:1
DIVX is based on the MPEG-4 compression format. It is a new pay-per-view version of the DVD movie-on-a-CD format. The discs are cheap to buy. DIVX discs are encrypted and cannot be played in normal DVD players nor in the DVD-ROM drives in newer computers.
Currently, the version of DIVX have DIVX 3.11, DIVX 4.12 and DIVX 5.05. Support MP subtitle, includes: English, simplified Chinese, complicated Chinese, Japanese, Russian, West Europe and Middle Europe languages but doesn’t support several subtitles at the same time.
