Like many of the other codecs we've discussed, fractal compression is block oriented. Fractal compression is highly asymmetric because determining the mathematical equations is very compute intensive. However, decoding the image for display is very fast. While there is great promise in fractal compression, it has yet to gain significant use. Wavelet Compression Wavelet compression performs compression by breaking each frame apart based on frequency.
Wavelet compression is symmetric, compressing and decompressing quite quickly.
In addition to the codecs already discussed, there are numerous proprietary codecs in use. These range from ones designed for very high compression rates in video games, to the ones used in Sony's Digital BetaCam and Ampex's DCT, which use very low levels of compression to maintain very high quality. Summary Much work continues to be done in developing codecs. While we may eventually settle on one or two standards for each application, we are still a long way from determining what those standards will be. All rights reserved.